diff options
| author | Denis Vlasenko <vda.linux@googlemail.com> | 2006-12-27 04:35:09 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2006-12-27 04:35:09 +0000 |
| commit | 7b76233290bd9dead1848f28ed6d0edfcceb8e09 (patch) | |
| tree | b963999fc54eddb65f1929b894f868e24851fc9c /modutils | |
Correcting tag name to be like previous ones1_3_0
Diffstat (limited to 'modutils')
| -rw-r--r-- | modutils/Config.in | 158 | ||||
| -rw-r--r-- | modutils/Kbuild | 11 | ||||
| -rw-r--r-- | modutils/insmod.c | 4316 | ||||
| -rw-r--r-- | modutils/lsmod.c | 188 | ||||
| -rw-r--r-- | modutils/modprobe.c | 905 | ||||
| -rw-r--r-- | modutils/rmmod.c | 96 |
6 files changed, 5674 insertions, 0 deletions
diff --git a/modutils/Config.in b/modutils/Config.in new file mode 100644 index 000000000..6a6956755 --- /dev/null +++ b/modutils/Config.in @@ -0,0 +1,158 @@ +# +# For a description of the syntax of this configuration file, +# see scripts/kbuild/config-language.txt. +# + +menu "Linux Module Utilities" + +config INSMOD + bool "insmod" + default n + help + insmod is used to load specified modules in the running kernel. + +config FEATURE_INSMOD_VERSION_CHECKING + bool "Module version checking" + default n + depends on INSMOD && FEATURE_2_4_MODULES + help + Support checking of versions for modules. This is used to + ensure that the kernel and module are made for each other. + +config FEATURE_INSMOD_KSYMOOPS_SYMBOLS + bool "Add module symbols to kernel symbol table" + default n + depends on INSMOD && FEATURE_2_4_MODULES + help + By adding module symbols to the kernel symbol table, Oops messages + occuring within kernel modules can be properly debugged. By enabling + this feature, module symbols will always be added to the kernel symbol + table for properly debugging support. If you are not interested in + Oops messages from kernel modules, say N. + +config FEATURE_INSMOD_LOADINKMEM + bool "In kernel memory optimization (uClinux only)" + default n + depends on INSMOD && FEATURE_2_4_MODULES + help + This is a special uClinux only memory optimization that lets insmod + load the specified kernel module directly into kernel space, reducing + memory usage by preventing the need for two copies of the module + being loaded into memory. + +config FEATURE_INSMOD_LOAD_MAP + bool "Enable load map (-m) option" + default n + depends on INSMOD && ( FEATURE_2_4_MODULES || FEATURE_2_6_MODULES ) + help + Enabling this, one would be able to get a load map + output on stdout. This makes kernel module debugging + easier. + If you don't plan to debug kernel modules, you + don't need this option. + +config FEATURE_INSMOD_LOAD_MAP_FULL + bool "Symbols in load map" + default y + depends on FEATURE_INSMOD_LOAD_MAP + help + Without this option, -m will only output section + load map. With this option, -m will also output + symbols load map. + +config RMMOD + bool "rmmod" + default n + help + rmmod is used to unload specified modules from the kernel. + +config LSMOD + bool "lsmod" + default n + help + lsmod is used to display a list of loaded modules. + +config FEATURE_LSMOD_PRETTY_2_6_OUTPUT + bool "lsmod pretty output for 2.6.x Linux kernels " + default n + depends on LSMOD + help + This option makes output format of lsmod adjusted to + the format of module-init-tools for Linux kernel 2.6. + +config MODPROBE + bool "modprobe" + default n + help + Handle the loading of modules, and their dependencies on a high + level. + + Note that in the state, modprobe does not understand multiple + module options from the configuration file. See option below. + +config FEATURE_MODPROBE_MULTIPLE_OPTIONS + bool + prompt "Multiple options parsing" if NITPICK + default y + depends on MODPROBE + help + Allow modprobe to understand more than one option to pass to + modules. + + This is a WIP, while waiting for a common argument parsing + common amongst all BB applets (shell, modprobe, etc...) and + adds around 600 bytes on x86, 700 bytes on ARM. The code is + biggish and uggly, but just works. + + Saying Y here is not a bad idea if you're not that short + on storage capacity. + +config FEATURE_MODPROBE_FANCY_ALIAS + bool + prompt "Fancy alias parsing" if NITPICK + default y + depends on MODPROBE && FEATURE_2_6_MODULES + help + Say 'y' here to enable parsing of aliases with underscore/dash + mismatch between module name and file name, along with bus-specific + aliases (such as pci:... or usb:... aliases). + +comment "Options common to multiple modutils" + depends on INSMOD || RMMOD || MODPROBE || LSMOD + +config FEATURE_CHECK_TAINTED_MODULE + # Simulate indentation + bool "Support tainted module checking with new kernels" + default y + depends on INSMOD || LSMOD + help + Support checking for tainted modules. These are usually binary + only modules that will make the linux-kernel list ignore your + support request. + This option is required to support GPLONLY modules. + +config FEATURE_2_4_MODULES + # Simulate indentation + bool "Support version 2.2.x to 2.4.x Linux kernels" + default y + depends on INSMOD || RMMOD || MODPROBE + help + Support module loading for 2.2.x and 2.4.x Linux kernels. + +config FEATURE_2_6_MODULES + # Simulate indentation + bool "Support version 2.6.x Linux kernels" + default y + depends on INSMOD || RMMOD || MODPROBE + help + Support module loading for newer 2.6.x Linux kernels. + + +config FEATURE_QUERY_MODULE_INTERFACE + bool + default y + depends on FEATURE_2_4_MODULES && !FEATURE_2_6_MODULES + + +endmenu + diff --git a/modutils/Kbuild b/modutils/Kbuild new file mode 100644 index 000000000..cff02b4f2 --- /dev/null +++ b/modutils/Kbuild @@ -0,0 +1,11 @@ +# Makefile for busybox +# +# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org> +# +# Licensed under the GPL v2, see the file LICENSE in this tarball. + +lib-y:= +lib-$(CONFIG_INSMOD) += insmod.o +lib-$(CONFIG_LSMOD) += lsmod.o +lib-$(CONFIG_MODPROBE) += modprobe.o +lib-$(CONFIG_RMMOD) += rmmod.o diff --git a/modutils/insmod.c b/modutils/insmod.c new file mode 100644 index 000000000..7b715b9c3 --- /dev/null +++ b/modutils/insmod.c @@ -0,0 +1,4316 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini insmod implementation for busybox + * + * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64, + * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64. + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * and Ron Alder <alder@lineo.com> + * + * Rodney Radford <rradford@mindspring.com> 17-Aug-2004. + * Added x86_64 support. + * + * Miles Bader <miles@gnu.org> added NEC V850E support. + * + * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4 + * and (theoretically) SH3. I have only tested SH4 in little endian mode. + * + * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and + * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only + * very minor changes required to also work with StrongArm and presumably + * all ARM based systems. + * + * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004. + * added Renesas H8/300 support. + * + * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003. + * Integrated support for sh64 (SH-5), from preliminary modutils + * patches from Benedict Gaster <benedict.gaster@superh.com>. + * Currently limited to support for 32bit ABI. + * + * Magnus Damm <damm@opensource.se> 22-May-2002. + * The plt and got code are now using the same structs. + * Added generic linked list code to fully support PowerPC. + * Replaced the mess in arch_apply_relocation() with architecture blocks. + * The arch_create_got() function got cleaned up with architecture blocks. + * These blocks should be easy maintain and sync with obj_xxx.c in modutils. + * + * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001. + * PowerPC specific code stolen from modutils-2.3.16, + * written by Paul Mackerras, Copyright 1996, 1997 Linux International. + * I've only tested the code on mpc8xx platforms in big-endian mode. + * Did some cleanup and added USE_xxx_ENTRIES... + * + * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001. + * based on modutils-2.4.2 + * MIPS specific support for Elf loading and relocation. + * Copyright 1996, 1997 Linux International. + * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu> + * + * Based almost entirely on the Linux modutils-2.3.11 implementation. + * Copyright 1996, 1997 Linux International. + * New implementation contributed by Richard Henderson <rth@tamu.edu> + * Based on original work by Bjorn Ekwall <bj0rn@blox.se> + * Restructured (and partly rewritten) by: + * Björn Ekwall <bj0rn@blox.se> February 1999 + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "busybox.h" +#include <libgen.h> +#include <sys/utsname.h> + +#if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES +#define ENABLE_FEATURE_2_4_MODULES 1 +#endif + +#if !ENABLE_FEATURE_2_4_MODULES +#define insmod_ng_main insmod_main +#endif + +#if ENABLE_FEATURE_2_6_MODULES +extern int insmod_ng_main( int argc, char **argv); +#endif + + +#if ENABLE_FEATURE_2_4_MODULES + + +#if ENABLE_FEATURE_INSMOD_LOADINKMEM +#define LOADBITS 0 +#else +#define LOADBITS 1 +#endif + + +/* Alpha */ +#if defined(__alpha__) +#define MATCH_MACHINE(x) (x == EM_ALPHA) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +/* ARM support */ +#if defined(__arm__) +#define MATCH_MACHINE(x) (x == EM_ARM) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#endif + +/* blackfin */ +#if defined(BFIN) +#define MATCH_MACHINE(x) (x == EM_BLACKFIN) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* CRIS */ +#if defined(__cris__) +#define MATCH_MACHINE(x) (x == EM_CRIS) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#ifndef EM_CRIS +#define EM_CRIS 76 +#define R_CRIS_NONE 0 +#define R_CRIS_32 3 +#endif +#endif + +/* H8/300 */ +#if defined(__H8300H__) || defined(__H8300S__) +#define MATCH_MACHINE(x) (x == EM_H8_300) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_SINGLE +#define SYMBOL_PREFIX "_" +#endif + +/* PA-RISC / HP-PA */ +#if defined(__hppa__) +#define MATCH_MACHINE(x) (x == EM_PARISC) +#define SHT_RELM SHT_RELA +#if defined(__LP64__) +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#else +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif +#endif + +/* x86 */ +#if defined(__i386__) +#ifndef EM_486 +#define MATCH_MACHINE(x) (x == EM_386) +#else +#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) +#endif +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +#endif + +/* IA64, aka Itanium */ +#if defined(__ia64__) +#define MATCH_MACHINE(x) (x == EM_IA_64) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +/* m68k */ +#if defined(__mc68000__) +#define MATCH_MACHINE(x) (x == EM_68K) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +#endif + +/* Microblaze */ +#if defined(__microblaze__) +#define USE_SINGLE +#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* MIPS */ +#if defined(__mips__) +#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +/* Account for ELF spec changes. */ +#ifndef EM_MIPS_RS3_LE +#ifdef EM_MIPS_RS4_BE +#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE +#else +#define EM_MIPS_RS3_LE 10 +#endif +#endif /* !EM_MIPS_RS3_LE */ +#define ARCHDATAM "__dbe_table" +#endif + +/* Nios II */ +#if defined(__nios2__) +#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* PowerPC */ +#if defined(__powerpc64__) +#define MATCH_MACHINE(x) (x == EM_PPC64) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#elif defined(__powerpc__) +#define MATCH_MACHINE(x) (x == EM_PPC) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 16 +#define USE_PLT_LIST +#define LIST_ARCHTYPE ElfW(Addr) +#define USE_LIST +#define ARCHDATAM "__ftr_fixup" +#endif + +/* S390 */ +#if defined(__s390__) +#define MATCH_MACHINE(x) (x == EM_S390) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#endif + +/* SuperH */ +#if defined(__sh__) +#define MATCH_MACHINE(x) (x == EM_SH) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +/* the SH changes have only been tested in =little endian= mode */ +/* I'm not sure about big endian, so let's warn: */ +#if defined(__sh__) && BB_BIG_ENDIAN +# error insmod.c may require changes for use on big endian SH +#endif +/* it may or may not work on the SH1/SH2... Error on those also */ +#if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__)) +#error insmod.c may require changes for SH1 or SH2 use +#endif +#endif + +/* Sparc */ +#if defined(__sparc__) +#define MATCH_MACHINE(x) (x == EM_SPARC) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* v850e */ +#if defined (__v850e__) +#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_SINGLE +#ifndef EM_CYGNUS_V850 /* grumble */ +#define EM_CYGNUS_V850 0x9080 +#endif +#define SYMBOL_PREFIX "_" +#endif + +/* X86_64 */ +#if defined(__x86_64__) +#define MATCH_MACHINE(x) (x == EM_X86_64) +#define SHT_RELM SHT_RELA +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +#ifndef SHT_RELM +#error Sorry, but insmod.c does not yet support this architecture... +#endif + + +//---------------------------------------------------------------------------- +//--------modutils module.h, lines 45-242 +//---------------------------------------------------------------------------- + +/* Definitions for the Linux module syscall interface. + Copyright 1996, 1997 Linux International. + + Contributed by Richard Henderson <rth@tamu.edu> + + This file is part of the Linux modutils. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 2 of the License, or (at your + option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#ifndef MODUTILS_MODULE_H +/* Why? static const int MODUTILS_MODULE_H = 1;*/ + +/*======================================================================*/ +/* For sizeof() which are related to the module platform and not to the + environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */ + +#define tgt_sizeof_char sizeof(char) +#define tgt_sizeof_short sizeof(short) +#define tgt_sizeof_int sizeof(int) +#define tgt_sizeof_long sizeof(long) +#define tgt_sizeof_char_p sizeof(char *) +#define tgt_sizeof_void_p sizeof(void *) +#define tgt_long long + +#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64) +#undef tgt_sizeof_long +#undef tgt_sizeof_char_p +#undef tgt_sizeof_void_p +#undef tgt_long +enum { + tgt_sizeof_long = 8, + tgt_sizeof_char_p = 8, + tgt_sizeof_void_p = 8 +}; +#define tgt_long long long +#endif + +/*======================================================================*/ +/* The structures used in Linux 2.1. */ + +/* Note: new_module_symbol does not use tgt_long intentionally */ +struct new_module_symbol { + unsigned long value; + unsigned long name; +}; + +struct new_module_persist; + +struct new_module_ref { + unsigned tgt_long dep; /* kernel addresses */ + unsigned tgt_long ref; + unsigned tgt_long next_ref; +}; + +struct new_module { + unsigned tgt_long size_of_struct; /* == sizeof(module) */ + unsigned tgt_long next; + unsigned tgt_long name; + unsigned tgt_long size; + + tgt_long usecount; + unsigned tgt_long flags; /* AUTOCLEAN et al */ + + unsigned nsyms; + unsigned ndeps; + + unsigned tgt_long syms; + unsigned tgt_long deps; + unsigned tgt_long refs; + unsigned tgt_long init; + unsigned tgt_long cleanup; + unsigned tgt_long ex_table_start; + unsigned tgt_long ex_table_end; +#ifdef __alpha__ + unsigned tgt_long gp; +#endif + /* Everything after here is extension. */ + unsigned tgt_long persist_start; + unsigned tgt_long persist_end; + unsigned tgt_long can_unload; + unsigned tgt_long runsize; + const char *kallsyms_start; /* All symbols for kernel debugging */ + const char *kallsyms_end; + const char *archdata_start; /* arch specific data for module */ + const char *archdata_end; + const char *kernel_data; /* Reserved for kernel internal use */ +}; + +#ifdef ARCHDATAM +#define ARCHDATA_SEC_NAME ARCHDATAM +#else +#define ARCHDATA_SEC_NAME "__archdata" +#endif +#define KALLSYMS_SEC_NAME "__kallsyms" + + +struct new_module_info { + unsigned long addr; + unsigned long size; + unsigned long flags; + long usecount; +}; + +/* Bits of module.flags. */ +enum { + NEW_MOD_RUNNING = 1, + NEW_MOD_DELETED = 2, + NEW_MOD_AUTOCLEAN = 4, + NEW_MOD_VISITED = 8, + NEW_MOD_USED_ONCE = 16 +}; + +int init_module(const char *name, const struct new_module *); +int query_module(const char *name, int which, void *buf, + size_t bufsize, size_t *ret); + +/* Values for query_module's which. */ +enum { + QM_MODULES = 1, + QM_DEPS = 2, + QM_REFS = 3, + QM_SYMBOLS = 4, + QM_INFO = 5 +}; + +/*======================================================================*/ +/* The system calls unchanged between 2.0 and 2.1. */ + +unsigned long create_module(const char *, size_t); +int delete_module(const char *); + + +#endif /* module.h */ + +//---------------------------------------------------------------------------- +//--------end of modutils module.h +//---------------------------------------------------------------------------- + + + +//---------------------------------------------------------------------------- +//--------modutils obj.h, lines 253-462 +//---------------------------------------------------------------------------- + +/* Elf object file loading and relocation routines. + Copyright 1996, 1997 Linux International. + + Contributed by Richard Henderson <rth@tamu.edu> + + This file is part of the Linux modutils. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 2 of the License, or (at your + option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#ifndef MODUTILS_OBJ_H +/* Why? static const int MODUTILS_OBJ_H = 1; */ + +/* The relocatable object is manipulated using elfin types. */ + +#include <stdio.h> +#include <elf.h> +#include <endian.h> + +#ifndef ElfW +# if ELFCLASSM == ELFCLASS32 +# define ElfW(x) Elf32_ ## x +# define ELFW(x) ELF32_ ## x +# else +# define ElfW(x) Elf64_ ## x +# define ELFW(x) ELF64_ ## x +# endif +#endif + +/* For some reason this is missing from some ancient C libraries.... */ +#ifndef ELF32_ST_INFO +# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) +#endif + +#ifndef ELF64_ST_INFO +# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) +#endif + +#define ELF_ST_BIND(info) ELFW(ST_BIND)(info) +#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info) +#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type) +#define ELF_R_TYPE(val) ELFW(R_TYPE)(val) +#define ELF_R_SYM(val) ELFW(R_SYM)(val) + +struct obj_string_patch; +struct obj_symbol_patch; + +struct obj_section +{ + ElfW(Shdr) header; + const char *name; + char *contents; + struct obj_section *load_next; + int idx; +}; + +struct obj_symbol +{ + struct obj_symbol *next; /* hash table link */ + const char *name; + unsigned long value; + unsigned long size; + int secidx; /* the defining section index/module */ + int info; + int ksymidx; /* for export to the kernel symtab */ + int referenced; /* actually used in the link */ +}; + +/* Hardcode the hash table size. We shouldn't be needing so many + symbols that we begin to degrade performance, and we get a big win + by giving the compiler a constant divisor. */ + +#define HASH_BUCKETS 521 + +struct obj_file { + ElfW(Ehdr) header; + ElfW(Addr) baseaddr; + struct obj_section **sections; + struct obj_section *load_order; + struct obj_section **load_order_search_start; + struct obj_string_patch *string_patches; + struct obj_symbol_patch *symbol_patches; + int (*symbol_cmp)(const char *, const char *); + unsigned long (*symbol_hash)(const char *); + unsigned long local_symtab_size; + struct obj_symbol **local_symtab; + struct obj_symbol *symtab[HASH_BUCKETS]; +}; + +enum obj_reloc { + obj_reloc_ok, + obj_reloc_overflow, + obj_reloc_dangerous, + obj_reloc_unhandled +}; + +struct obj_string_patch { + struct obj_string_patch *next; + int reloc_secidx; + ElfW(Addr) reloc_offset; + ElfW(Addr) string_offset; +}; + +struct obj_symbol_patch { + struct obj_symbol_patch *next; + int reloc_secidx; + ElfW(Addr) reloc_offset; + struct obj_symbol *sym; +}; + + +/* Generic object manipulation routines. */ + +static unsigned long obj_elf_hash(const char *); + +static unsigned long obj_elf_hash_n(const char *, unsigned long len); + +static struct obj_symbol *obj_find_symbol (struct obj_file *f, + const char *name); + +static ElfW(Addr) obj_symbol_final_value(struct obj_file *f, + struct obj_symbol *sym); + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +static void obj_set_symbol_compare(struct obj_file *f, + int (*cmp)(const char *, const char *), + unsigned long (*hash)(const char *)); +#endif + +static struct obj_section *obj_find_section (struct obj_file *f, + const char *name); + +static void obj_insert_section_load_order (struct obj_file *f, + struct obj_section *sec); + +static struct obj_section *obj_create_alloced_section (struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size); + +static struct obj_section *obj_create_alloced_section_first (struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size); + +static void *obj_extend_section (struct obj_section *sec, unsigned long more); + +static int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + const char *string); + +static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + struct obj_symbol *sym); + +static int obj_check_undefineds(struct obj_file *f); + +static void obj_allocate_commons(struct obj_file *f); + +static unsigned long obj_load_size (struct obj_file *f); + +static int obj_relocate (struct obj_file *f, ElfW(Addr) base); + +static struct obj_file *obj_load(FILE *f, int loadprogbits); + +static int obj_create_image (struct obj_file *f, char *image); + +/* Architecture specific manipulation routines. */ + +static struct obj_file *arch_new_file (void); + +static struct obj_section *arch_new_section (void); + +static struct obj_symbol *arch_new_symbol (void); + +static enum obj_reloc arch_apply_relocation (struct obj_file *f, + struct obj_section *targsec, + struct obj_section *symsec, + struct obj_symbol *sym, + ElfW(RelM) *rel, ElfW(Addr) value); + +static void arch_create_got (struct obj_file *f); +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE +static int obj_gpl_license(struct obj_file *f, const char **license); +#endif /* FEATURE_CHECK_TAINTED_MODULE */ +#endif /* obj.h */ +//---------------------------------------------------------------------------- +//--------end of modutils obj.h +//---------------------------------------------------------------------------- + + +/* SPFX is always a string, so it can be concatenated to string constants. */ +#ifdef SYMBOL_PREFIX +#define SPFX SYMBOL_PREFIX +#else +#define SPFX "" +#endif + + +#define _PATH_MODULES "/lib/modules" +enum { STRVERSIONLEN = 64 }; + +/*======================================================================*/ + +#define OPTION_STR "sLo:fkvqx" USE_FEATURE_INSMOD_LOAD_MAP("m") +enum { + OPT_s = 0x1, // -s /* log to syslog */ + /* Not supported but kernel needs this for request_module(), + as this calls: modprobe -k -s -- <module> + so silently ignore this flag */ + OPT_L = 0x2, // -L /* Stub warning */ + /* Compatibility with modprobe. + In theory, this does locking, but we don't do + that. So be careful and plan your life around not + loading the same module 50 times concurrently. */ + OPT_o = 0x4, // -o /* name the output module */ + OPT_f = 0x8, // -f /* force loading */ + OPT_k = 0x10, // -k /* module loaded by kerneld, auto-cleanable */ + OPT_v = 0x20, // -v /* verbose output */ + OPT_q = 0x40, // -q /* silent */ + OPT_x = 0x80, // -x /* do not export externs */ + OPT_m = 0x100, // -m /* print module load map */ +}; +#define flag_force_load (option_mask32 & OPT_f) +#define flag_autoclean (option_mask32 & OPT_k) +#define flag_verbose (option_mask32 & OPT_v) +#define flag_quiet (option_mask32 & OPT_q) +#define flag_noexport (option_mask32 & OPT_x) +#if ENABLE_FEATURE_INSMOD_LOAD_MAP +#define flag_print_load_map (option_mask32 & OPT_m) +#else +#define flag_print_load_map 0 +#endif + +/*======================================================================*/ + +#if defined(USE_LIST) + +struct arch_list_entry +{ + struct arch_list_entry *next; + LIST_ARCHTYPE addend; + int offset; + int inited : 1; +}; + +#endif + +#if defined(USE_SINGLE) + +struct arch_single_entry +{ + int offset; + int inited : 1; + int allocated : 1; +}; + +#endif + +#if defined(__mips__) +struct mips_hi16 +{ + struct mips_hi16 *next; + ElfW(Addr) *addr; + ElfW(Addr) value; +}; +#endif + +struct arch_file { + struct obj_file root; +#if defined(USE_PLT_ENTRIES) + struct obj_section *plt; +#endif +#if defined(USE_GOT_ENTRIES) + struct obj_section *got; +#endif +#if defined(__mips__) + struct mips_hi16 *mips_hi16_list; +#endif +}; + +struct arch_symbol { + struct obj_symbol root; +#if defined(USE_PLT_ENTRIES) +#if defined(USE_PLT_LIST) + struct arch_list_entry *pltent; +#else + struct arch_single_entry pltent; +#endif +#endif +#if defined(USE_GOT_ENTRIES) + struct arch_single_entry gotent; +#endif +}; + + +struct external_module { + const char *name; + ElfW(Addr) addr; + int used; + size_t nsyms; + struct new_module_symbol *syms; +}; + +static struct new_module_symbol *ksyms; +static size_t nksyms; + +static struct external_module *ext_modules; +static int n_ext_modules; +static int n_ext_modules_used; +extern int delete_module(const char *); + +static char *m_filename; +static char *m_fullName; + + +/*======================================================================*/ + + +static int check_module_name_match(const char *filename, struct stat *statbuf, + void *userdata, int depth) +{ + char *fullname = (char *) userdata; + + if (fullname[0] == '\0') + return FALSE; + else { + char *tmp, *tmp1 = xstrdup(filename); + tmp = bb_get_last_path_component(tmp1); + if (strcmp(tmp, fullname) == 0) { + free(tmp1); + /* Stop searching if we find a match */ + m_filename = xstrdup(filename); + return FALSE; + } + free(tmp1); + } + return TRUE; +} + + +/*======================================================================*/ + +static struct obj_file *arch_new_file(void) +{ + struct arch_file *f; + f = xmalloc(sizeof(*f)); + + memset(f, 0, sizeof(*f)); + + return &f->root; +} + +static struct obj_section *arch_new_section(void) +{ + return xmalloc(sizeof(struct obj_section)); +} + +static struct obj_symbol *arch_new_symbol(void) +{ + struct arch_symbol *sym; + sym = xmalloc(sizeof(*sym)); + + memset(sym, 0, sizeof(*sym)); + + return &sym->root; +} + +static enum obj_reloc +arch_apply_relocation(struct obj_file *f, + struct obj_section *targsec, + struct obj_section *symsec, + struct obj_symbol *sym, + ElfW(RelM) *rel, ElfW(Addr) v) +{ + struct arch_file *ifile = (struct arch_file *) f; + enum obj_reloc ret = obj_reloc_ok; + ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); + ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + struct arch_symbol *isym = (struct arch_symbol *) sym; +#endif +#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) || defined(__sh__) || defined(__s390__) +#if defined(USE_GOT_ENTRIES) + ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; +#endif +#endif +#if defined(USE_PLT_ENTRIES) + ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; + unsigned long *ip; +# if defined(USE_PLT_LIST) + struct arch_list_entry *pe; +# else + struct arch_single_entry *pe; +# endif +#endif + + switch (ELF_R_TYPE(rel->r_info)) { + +#if defined(__arm__) + + case R_ARM_NONE: + break; + + case R_ARM_ABS32: + *loc += v; + break; + + case R_ARM_GOT32: + goto bb_use_got; + + case R_ARM_GOTPC: + /* relative reloc, always to _GLOBAL_OFFSET_TABLE_ + * (which is .got) similar to branch, + * but is full 32 bits relative */ + + *loc += got - dot; + break; + + case R_ARM_PC24: + case R_ARM_PLT32: + goto bb_use_plt; + + case R_ARM_GOTOFF: /* address relative to the got */ + *loc += v - got; + break; + +#elif defined(__cris__) + + case R_CRIS_NONE: + break; + + case R_CRIS_32: + /* CRIS keeps the relocation value in the r_addend field and + * should not use whats in *loc at all + */ + *loc = v; + break; + +#elif defined(__H8300H__) || defined(__H8300S__) + + case R_H8_DIR24R8: + loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1); + *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v); + break; + case R_H8_DIR24A8: + *loc += v; + break; + case R_H8_DIR32: + case R_H8_DIR32A16: + *loc += v; + break; + case R_H8_PCREL16: + v -= dot + 2; + if ((ElfW(Sword))v > 0x7fff || + (ElfW(Sword))v < -(ElfW(Sword))0x8000) + ret = obj_reloc_overflow; + else + *(unsigned short *)loc = v; + break; + case R_H8_PCREL8: + v -= dot + 1; + if ((ElfW(Sword))v > 0x7f || + (ElfW(Sword))v < -(ElfW(Sword))0x80) + ret = obj_reloc_overflow; + else + *(unsigned char *)loc = v; + break; + +#elif defined(__i386__) + + case R_386_NONE: + break; + + case R_386_32: + *loc += v; + break; + + case R_386_PLT32: + case R_386_PC32: + *loc += v - dot; + break; + + case R_386_GLOB_DAT: + case R_386_JMP_SLOT: + *loc = v; + break; + + case R_386_RELATIVE: + *loc += f->baseaddr; + break; + + case R_386_GOTPC: + *loc += got - dot; + break; + + case R_386_GOT32: + goto bb_use_got; + + case R_386_GOTOFF: + *loc += v - got; + break; + +#elif defined (__microblaze__) + case R_MICROBLAZE_NONE: + case R_MICROBLAZE_64_NONE: + case R_MICROBLAZE_32_SYM_OP_SYM: + case R_MICROBLAZE_32_PCREL: + break; + + case R_MICROBLAZE_64_PCREL: { + /* dot is the address of the current instruction. + * v is the target symbol address. + * So we need to extract the offset in the code, + * adding v, then subtrating the current address + * of this instruction. + * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000" + */ + + /* Get split offset stored in code */ + unsigned int temp = (loc[0] & 0xFFFF) << 16 | + (loc[1] & 0xFFFF); + + /* Adjust relative offset. -4 adjustment required + * because dot points to the IMM insn, but branch + * is computed relative to the branch instruction itself. + */ + temp += v - dot - 4; + + /* Store back into code */ + loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16; + loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF); + + break; + } + + case R_MICROBLAZE_32: + *loc += v; + break; + + case R_MICROBLAZE_64: { + /* Get split pointer stored in code */ + unsigned int temp1 = (loc[0] & 0xFFFF) << 16 | + (loc[1] & 0xFFFF); + + /* Add reloc offset */ + temp1+=v; + + /* Store back into code */ + loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16; + loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF); + + break; + } + + case R_MICROBLAZE_32_PCREL_LO: + case R_MICROBLAZE_32_LO: + case R_MICROBLAZE_SRO32: + case R_MICROBLAZE_SRW32: + ret = obj_reloc_unhandled; + break; + +#elif defined(__mc68000__) + + case R_68K_NONE: + break; + + case R_68K_32: + *loc += v; + break; + + case R_68K_8: + if (v > 0xff) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_68K_16: + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_68K_PC8: + v -= dot; + if ((ElfW(Sword))v > 0x7f || + (ElfW(Sword))v < -(ElfW(Sword))0x80) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_68K_PC16: + v -= dot; + if ((ElfW(Sword))v > 0x7fff || + (ElfW(Sword))v < -(ElfW(Sword))0x8000) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_68K_PC32: + *(int *)loc = v - dot; + break; + + case R_68K_GLOB_DAT: + case R_68K_JMP_SLOT: + *loc = v; + break; + + case R_68K_RELATIVE: + *(int *)loc += f->baseaddr; + break; + + case R_68K_GOT32: + goto bb_use_got; + +# ifdef R_68K_GOTOFF + case R_68K_GOTOFF: + *loc += v - got; + break; +# endif + +#elif defined(__mips__) + + case R_MIPS_NONE: + break; + + case R_MIPS_32: + *loc += v; + break; + + case R_MIPS_26: + if (v % 4) + ret = obj_reloc_dangerous; + if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000)) + ret = obj_reloc_overflow; + *loc = + (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) & + 0x03ffffff); + break; + + case R_MIPS_HI16: + { + struct mips_hi16 *n; + + /* We cannot relocate this one now because we don't know the value + of the carry we need to add. Save the information, and let LO16 + do the actual relocation. */ + n = (struct mips_hi16 *) xmalloc(sizeof *n); + n->addr = loc; + n->value = v; + n->next = ifile->mips_hi16_list; + ifile->mips_hi16_list = n; + break; + } + + case R_MIPS_LO16: + { + unsigned long insnlo = *loc; + ElfW(Addr) val, vallo; + + /* Sign extend the addend we extract from the lo insn. */ + vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; + + if (ifile->mips_hi16_list != NULL) { + struct mips_hi16 *l; + + l = ifile->mips_hi16_list; + while (l != NULL) { + struct mips_hi16 *next; + unsigned long insn; + + /* Do the HI16 relocation. Note that we actually don't + need to know anything about the LO16 itself, except where + to find the low 16 bits of the addend needed by the LO16. */ + insn = *l->addr; + val = + ((insn & 0xffff) << 16) + + vallo; + val += v; + + /* Account for the sign extension that will happen in the + low bits. */ + val = + ((val >> 16) + + ((val & 0x8000) != + 0)) & 0xffff; + + insn = (insn & ~0xffff) | val; + *l->addr = insn; + + next = l->next; + free(l); + l = next; + } + + ifile->mips_hi16_list = NULL; + } + + /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */ + val = v + vallo; + insnlo = (insnlo & ~0xffff) | (val & 0xffff); + *loc = insnlo; + break; + } + +#elif defined(__nios2__) + + case R_NIOS2_NONE: + break; + + case R_NIOS2_BFD_RELOC_32: + *loc += v; + break; + + case R_NIOS2_BFD_RELOC_16: + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_NIOS2_BFD_RELOC_8: + if (v > 0xff) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_NIOS2_S16: + { + Elf32_Addr word; + + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_U16: + { + Elf32_Addr word; + + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_PCREL16: + { + Elf32_Addr word; + + v -= dot + 4; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); + } + break; + + case R_NIOS2_GPREL: + { + Elf32_Addr word, gp; + /* get _gp */ + gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp")); + v-=gp; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); + } + break; + + case R_NIOS2_CALL26: + if (v & 3) + ret = obj_reloc_dangerous; + if ((v >> 28) != (dot >> 28)) + ret = obj_reloc_overflow; + *loc = (*loc & 0x3f) | ((v >> 2) << 6); + break; + + case R_NIOS2_IMM5: + { + Elf32_Addr word; + + if (v > 0x1f) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0x7c0; + *loc = word | ((v & 0x1f) << 6); + } + break; + + case R_NIOS2_IMM6: + { + Elf32_Addr word; + + if (v > 0x3f) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0xfc0; + *loc = word | ((v & 0x3f) << 6); + } + break; + + case R_NIOS2_IMM8: + { + Elf32_Addr word; + + if (v > 0xff) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0x3fc0; + *loc = word | ((v & 0xff) << 6); + } + break; + + case R_NIOS2_HI16: + { + Elf32_Addr word; + + word = *loc; + *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_LO16: + { + Elf32_Addr word; + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_HIADJ16: + { + Elf32_Addr word1, word2; + + word1 = *loc; + word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff; + *loc = ((((word1 >> 22) << 16) | word2) << 6) | + (word1 & 0x3f); + } + break; + +#elif defined(__powerpc64__) + /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */ + +#elif defined(__powerpc__) + + case R_PPC_ADDR16_HA: + *(unsigned short *)loc = (v + 0x8000) >> 16; + break; + + case R_PPC_ADDR16_HI: + *(unsigned short *)loc = v >> 16; + break; + + case R_PPC_ADDR16_LO: + *(unsigned short *)loc = v; + break; + + case R_PPC_REL24: + goto bb_use_plt; + + case R_PPC_REL32: + *loc = v - dot; + break; + + case R_PPC_ADDR32: + *loc = v; + break; + +#elif defined(__s390__) + + case R_390_32: + *(unsigned int *) loc += v; + break; + case R_390_16: + *(unsigned short *) loc += v; + break; + case R_390_8: + *(unsigned char *) loc += v; + break; + + case R_390_PC32: + *(unsigned int *) loc += v - dot; + break; + case R_390_PC16DBL: + *(unsigned short *) loc += (v - dot) >> 1; + break; + case R_390_PC16: + *(unsigned short *) loc += v - dot; + break; + + case R_390_PLT32: + case R_390_PLT16DBL: + /* find the plt entry and initialize it. */ + pe = (struct arch_single_entry *) &isym->pltent; + if (pe->inited == 0) { + ip = (unsigned long *)(ifile->plt->contents + pe->offset); + ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */ + ip[1] = 0x100607f1; + if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) + ip[2] = v - 2; + else + ip[2] = v; + pe->inited = 1; + } + + /* Insert relative distance to target. */ + v = plt + pe->offset - dot; + if (ELF_R_TYPE(rel->r_info) == R_390_PLT32) + *(unsigned int *) loc = (unsigned int) v; + else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) + *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1); + break; + + case R_390_GLOB_DAT: + case R_390_JMP_SLOT: + *loc = v; + break; + + case R_390_RELATIVE: + *loc += f->baseaddr; + break; + + case R_390_GOTPC: + *(unsigned long *) loc += got - dot; + break; + + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + if (!isym->gotent.inited) + { + isym->gotent.inited = 1; + *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v; + } + if (ELF_R_TYPE(rel->r_info) == R_390_GOT12) + *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff; + else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16) + *(unsigned short *) loc += isym->gotent.offset; + else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32) + *(unsigned int *) loc += isym->gotent.offset; + break; + +# ifndef R_390_GOTOFF32 +# define R_390_GOTOFF32 R_390_GOTOFF +# endif + case R_390_GOTOFF32: + *loc += v - got; + break; + +#elif defined(__sh__) + + case R_SH_NONE: + break; + + case R_SH_DIR32: + *loc += v; + break; + + case R_SH_REL32: + *loc += v - dot; + break; + + case R_SH_PLT32: + *loc = v - dot; + break; + + case R_SH_GLOB_DAT: + case R_SH_JMP_SLOT: + *loc = v; + break; + + case R_SH_RELATIVE: + *loc = f->baseaddr + rel->r_addend; + break; + + case R_SH_GOTPC: + *loc = got - dot + rel->r_addend; + break; + + case R_SH_GOT32: + goto bb_use_got; + + case R_SH_GOTOFF: + *loc = v - got; + break; + +# if defined(__SH5__) + case R_SH_IMM_MEDLOW16: + case R_SH_IMM_LOW16: + { + ElfW(Addr) word; + + if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16) + v >>= 16; + + /* + * movi and shori have the format: + * + * | op | imm | reg | reserved | + * 31..26 25..10 9.. 4 3 .. 0 + * + * so we simply mask and or in imm. + */ + word = *loc & ~0x3fffc00; + word |= (v & 0xffff) << 10; + + *loc = word; + + break; + } + + case R_SH_IMM_MEDLOW16_PCREL: + case R_SH_IMM_LOW16_PCREL: + { + ElfW(Addr) word; + + word = *loc & ~0x3fffc00; + + v -= dot; + + if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL) + v >>= 16; + + word |= (v & 0xffff) << 10; + + *loc = word; + + break; + } +# endif /* __SH5__ */ + +#elif defined (__v850e__) + + case R_V850_NONE: + break; + + case R_V850_32: + /* We write two shorts instead of a long because even + 32-bit insns only need half-word alignment, but + 32-bit data needs to be long-word aligned. */ + v += ((unsigned short *)loc)[0]; + v += ((unsigned short *)loc)[1] << 16; + ((unsigned short *)loc)[0] = v & 0xffff; + ((unsigned short *)loc)[1] = (v >> 16) & 0xffff; + break; + + case R_V850_22_PCREL: + goto bb_use_plt; + +#elif defined(__x86_64__) + + case R_X86_64_NONE: + break; + + case R_X86_64_64: + *loc += v; + break; + + case R_X86_64_32: + *(unsigned int *) loc += v; + if (v > 0xffffffff) + { + ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */ + /* error("Possibly is module compiled without -mcmodel=kernel!"); */ + } + break; + + case R_X86_64_32S: + *(signed int *) loc += v; + break; + + case R_X86_64_16: + *(unsigned short *) loc += v; + break; + + case R_X86_64_8: + *(unsigned char *) loc += v; + break; + + case R_X86_64_PC32: + *(unsigned int *) loc += v - dot; + break; + + case R_X86_64_PC16: + *(unsigned short *) loc += v - dot; + break; + + case R_X86_64_PC8: + *(unsigned char *) loc += v - dot; + break; + + case R_X86_64_GLOB_DAT: + case R_X86_64_JUMP_SLOT: + *loc = v; + break; + + case R_X86_64_RELATIVE: + *loc += f->baseaddr; + break; + + case R_X86_64_GOT32: + case R_X86_64_GOTPCREL: + goto bb_use_got; +# if 0 + if (!isym->gotent.reloc_done) + { + isym->gotent.reloc_done = 1; + *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v; + } + /* XXX are these really correct? */ + if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL) + *(unsigned int *) loc += v + isym->gotent.offset; + else + *loc += isym->gotent.offset; + break; +# endif + +#else +# warning "no idea how to handle relocations on your arch" +#endif + + default: + printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info)); + ret = obj_reloc_unhandled; + break; + +#if defined(USE_PLT_ENTRIES) + +bb_use_plt: + + /* find the plt entry and initialize it if necessary */ + +#if defined(USE_PLT_LIST) + for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;) + pe = pe->next; +#else + pe = &isym->pltent; +#endif + + if (! pe->inited) { + ip = (unsigned long *) (ifile->plt->contents + pe->offset); + + /* generate some machine code */ + +#if defined(__arm__) + ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */ + ip[1] = v; /* sym@ */ +#endif +#if defined(__powerpc__) + ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */ + ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */ + ip[2] = 0x7d6903a6; /* mtctr r11 */ + ip[3] = 0x4e800420; /* bctr */ +#endif +#if defined (__v850e__) + /* We have to trash a register, so we assume that any control + transfer more than 21-bits away must be a function call + (so we can use a call-clobbered register). */ + ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */ + ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */ +#endif + pe->inited = 1; + } + + /* relative distance to target */ + v -= dot; + /* if the target is too far away.... */ +#if defined (__arm__) || defined (__powerpc__) + if ((int)v < -0x02000000 || (int)v >= 0x02000000) +#elif defined (__v850e__) + if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000) +#endif + /* go via the plt */ + v = plt + pe->offset - dot; + +#if defined (__v850e__) + if (v & 1) +#else + if (v & 3) +#endif + ret = obj_reloc_dangerous; + + /* merge the offset into the instruction. */ +#if defined(__arm__) + /* Convert to words. */ + v >>= 2; + + *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff); +#endif +#if defined(__powerpc__) + *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc); +#endif +#if defined (__v850e__) + /* We write two shorts instead of a long because even 32-bit insns + only need half-word alignment, but the 32-bit data write needs + to be long-word aligned. */ + ((unsigned short *)loc)[0] = + (*(unsigned short *)loc & 0xffc0) /* opcode + reg */ + | ((v >> 16) & 0x3f); /* offs high part */ + ((unsigned short *)loc)[1] = + (v & 0xffff); /* offs low part */ +#endif + break; +#endif /* USE_PLT_ENTRIES */ + +#if defined(USE_GOT_ENTRIES) +bb_use_got: + + /* needs an entry in the .got: set it, once */ + if (!isym->gotent.inited) { + isym->gotent.inited = 1; + *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v; + } + /* make the reloc with_respect_to_.got */ +#if defined(__sh__) + *loc += isym->gotent.offset + rel->r_addend; +#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__) + *loc += isym->gotent.offset; +#endif + break; + +#endif /* USE_GOT_ENTRIES */ + } + + return ret; +} + + +#if defined(USE_LIST) + +static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list, + int offset, int size) +{ + struct arch_list_entry *pe; + + for (pe = *list; pe != NULL; pe = pe->next) { + if (pe->addend == rel->r_addend) { + break; + } + } + + if (pe == NULL) { + pe = xmalloc(sizeof(struct arch_list_entry)); + pe->next = *list; + pe->addend = rel->r_addend; + pe->offset = offset; + pe->inited = 0; + *list = pe; + return size; + } + return 0; +} + +#endif + +#if defined(USE_SINGLE) + +static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single, + int offset, int size) +{ + if (single->allocated == 0) { + single->allocated = 1; + single->offset = offset; + single->inited = 0; + return size; + } + return 0; +} + +#endif + +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + +static struct obj_section *arch_xsect_init(struct obj_file *f, char *name, + int offset, int size) +{ + struct obj_section *myrelsec = obj_find_section(f, name); + + if (offset == 0) { + offset += size; + } + + if (myrelsec) { + obj_extend_section(myrelsec, offset); + } else { + myrelsec = obj_create_alloced_section(f, name, + size, offset); + } + + return myrelsec; +} + +#endif + +static void arch_create_got(struct obj_file *f) +{ +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + struct arch_file *ifile = (struct arch_file *) f; + int i; +#if defined(USE_GOT_ENTRIES) + int got_offset = 0, got_needed = 0, got_allocate; +#endif +#if defined(USE_PLT_ENTRIES) + int plt_offset = 0, plt_needed = 0, plt_allocate; +#endif + struct obj_section *relsec, *symsec, *strsec; + ElfW(RelM) *rel, *relend; + ElfW(Sym) *symtab, *extsym; + const char *strtab, *name; + struct arch_symbol *intsym; + + for (i = 0; i < f->header.e_shnum; ++i) { + relsec = f->sections[i]; + if (relsec->header.sh_type != SHT_RELM) + continue; + + symsec = f->sections[relsec->header.sh_link]; + strsec = f->sections[symsec->header.sh_link]; + + rel = (ElfW(RelM) *) relsec->contents; + relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); + symtab = (ElfW(Sym) *) symsec->contents; + strtab = (const char *) strsec->contents; + + for (; rel < relend; ++rel) { + extsym = &symtab[ELF_R_SYM(rel->r_info)]; + +#if defined(USE_GOT_ENTRIES) + got_allocate = 0; +#endif +#if defined(USE_PLT_ENTRIES) + plt_allocate = 0; +#endif + + switch (ELF_R_TYPE(rel->r_info)) { +#if defined(__arm__) + case R_ARM_PC24: + case R_ARM_PLT32: + plt_allocate = 1; + break; + + case R_ARM_GOTOFF: + case R_ARM_GOTPC: + got_needed = 1; + continue; + + case R_ARM_GOT32: + got_allocate = 1; + break; + +#elif defined(__i386__) + case R_386_GOTPC: + case R_386_GOTOFF: + got_needed = 1; + continue; + + case R_386_GOT32: + got_allocate = 1; + break; + +#elif defined(__powerpc__) + case R_PPC_REL24: + plt_allocate = 1; + break; + +#elif defined(__mc68000__) + case R_68K_GOT32: + got_allocate = 1; + break; + +#ifdef R_68K_GOTOFF + case R_68K_GOTOFF: + got_needed = 1; + continue; +#endif + +#elif defined(__sh__) + case R_SH_GOT32: + got_allocate = 1; + break; + + case R_SH_GOTPC: + case R_SH_GOTOFF: + got_needed = 1; + continue; + +#elif defined (__v850e__) + case R_V850_22_PCREL: + plt_needed = 1; + break; + +#endif + default: + continue; + } + + if (extsym->st_name != 0) { + name = strtab + extsym->st_name; + } else { + name = f->sections[extsym->st_shndx]->name; + } + intsym = (struct arch_symbol *) obj_find_symbol(f, name); +#if defined(USE_GOT_ENTRIES) + if (got_allocate) { + got_offset += arch_single_init( + rel, &intsym->gotent, + got_offset, GOT_ENTRY_SIZE); + + got_needed = 1; + } +#endif +#if defined(USE_PLT_ENTRIES) + if (plt_allocate) { +#if defined(USE_PLT_LIST) + plt_offset += arch_list_add( + rel, &intsym->pltent, + plt_offset, PLT_ENTRY_SIZE); +#else + plt_offset += arch_single_init( + rel, &intsym->pltent, + plt_offset, PLT_ENTRY_SIZE); +#endif + plt_needed = 1; + } +#endif + } + } + +#if defined(USE_GOT_ENTRIES) + if (got_needed) { + ifile->got = arch_xsect_init(f, ".got", got_offset, + GOT_ENTRY_SIZE); + } +#endif + +#if defined(USE_PLT_ENTRIES) + if (plt_needed) { + ifile->plt = arch_xsect_init(f, ".plt", plt_offset, + PLT_ENTRY_SIZE); + } +#endif + +#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */ +} + +/*======================================================================*/ + +/* Standard ELF hash function. */ +static unsigned long obj_elf_hash_n(const char *name, unsigned long n) +{ + unsigned long h = 0; + unsigned long g; + unsigned char ch; + + while (n > 0) { + ch = *name++; + h = (h << 4) + ch; + if ((g = (h & 0xf0000000)) != 0) { + h ^= g >> 24; + h &= ~g; + } + n--; + } + return h; +} + +static unsigned long obj_elf_hash(const char *name) +{ + return obj_elf_hash_n(name, strlen(name)); +} + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +/* String comparison for non-co-versioned kernel and module. */ + +static int ncv_strcmp(const char *a, const char *b) +{ + size_t alen = strlen(a), blen = strlen(b); + + if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R') + return strncmp(a, b, alen); + else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R') + return strncmp(a, b, blen); + else + return strcmp(a, b); +} + +/* String hashing for non-co-versioned kernel and module. Here + we are simply forced to drop the crc from the hash. */ + +static unsigned long ncv_symbol_hash(const char *str) +{ + size_t len = strlen(str); + if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R') + len -= 10; + return obj_elf_hash_n(str, len); +} + +static void +obj_set_symbol_compare(struct obj_file *f, + int (*cmp) (const char *, const char *), + unsigned long (*hash) (const char *)) +{ + if (cmp) + f->symbol_cmp = cmp; + if (hash) { + struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; + int i; + + f->symbol_hash = hash; + + memcpy(tmptab, f->symtab, sizeof(tmptab)); + memset(f->symtab, 0, sizeof(f->symtab)); + + for (i = 0; i < HASH_BUCKETS; ++i) + for (sym = tmptab[i]; sym; sym = next) { + unsigned long h = hash(sym->name) % HASH_BUCKETS; + next = sym->next; + sym->next = f->symtab[h]; + f->symtab[h] = sym; + } + } +} + +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + +static struct obj_symbol * +obj_add_symbol(struct obj_file *f, const char *name, + unsigned long symidx, int info, + int secidx, ElfW(Addr) value, + unsigned long size) +{ + struct obj_symbol *sym; + unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; + int n_type = ELF_ST_TYPE(info); + int n_binding = ELF_ST_BIND(info); + + for (sym = f->symtab[hash]; sym; sym = sym->next) + if (f->symbol_cmp(sym->name, name) == 0) { + int o_secidx = sym->secidx; + int o_info = sym->info; + int o_type = ELF_ST_TYPE(o_info); + int o_binding = ELF_ST_BIND(o_info); + + /* A redefinition! Is it legal? */ + + if (secidx == SHN_UNDEF) + return sym; + else if (o_secidx == SHN_UNDEF) + goto found; + else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) { + /* Cope with local and global symbols of the same name + in the same object file, as might have been created + by ld -r. The only reason locals are now seen at this + level at all is so that we can do semi-sensible things + with parameters. */ + + struct obj_symbol *nsym, **p; + + nsym = arch_new_symbol(); + nsym->next = sym->next; + nsym->ksymidx = -1; + + /* Excise the old (local) symbol from the hash chain. */ + for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) + continue; + *p = sym = nsym; + goto found; + } else if (n_binding == STB_LOCAL) { + /* Another symbol of the same name has already been defined. + Just add this to the local table. */ + sym = arch_new_symbol(); + sym->next = NULL; + sym->ksymidx = -1; + f->local_symtab[symidx] = sym; + goto found; + } else if (n_binding == STB_WEAK) + return sym; + else if (o_binding == STB_WEAK) + goto found; + /* Don't unify COMMON symbols with object types the programmer + doesn't expect. */ + else if (secidx == SHN_COMMON + && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) + return sym; + else if (o_secidx == SHN_COMMON + && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) + goto found; + else { + /* Don't report an error if the symbol is coming from + the kernel or some external module. */ + if (secidx <= SHN_HIRESERVE) + bb_error_msg("%s multiply defined", name); + return sym; + } + } + + /* Completely new symbol. */ + sym = arch_new_symbol(); + sym->next = f->symtab[hash]; + f->symtab[hash] = sym; + sym->ksymidx = -1; + + if (ELF_ST_BIND(info) == STB_LOCAL && symidx != -1) { + if (symidx >= f->local_symtab_size) + bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld", + name, (long) symidx, (long) f->local_symtab_size); + else + f->local_symtab[symidx] = sym; + } + +found: + sym->name = name; + sym->value = value; + sym->size = size; + sym->secidx = secidx; + sym->info = info; + + return sym; +} + +static struct obj_symbol * +obj_find_symbol(struct obj_file *f, const char *name) +{ + struct obj_symbol *sym; + unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; + + for (sym = f->symtab[hash]; sym; sym = sym->next) + if (f->symbol_cmp(sym->name, name) == 0) + return sym; + + return NULL; +} + +static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym) +{ + if (sym) { + if (sym->secidx >= SHN_LORESERVE) + return sym->value; + + return sym->value + f->sections[sym->secidx]->header.sh_addr; + } else { + /* As a special case, a NULL sym has value zero. */ + return 0; + } +} + +static struct obj_section *obj_find_section(struct obj_file *f, const char *name) +{ + int i, n = f->header.e_shnum; + + for (i = 0; i < n; ++i) + if (strcmp(f->sections[i]->name, name) == 0) + return f->sections[i]; + + return NULL; +} + +static int obj_load_order_prio(struct obj_section *a) +{ + unsigned long af, ac; + + af = a->header.sh_flags; + + ac = 0; + if (a->name[0] != '.' || strlen(a->name) != 10 || + strcmp(a->name + 5, ".init")) + ac |= 32; + if (af & SHF_ALLOC) + ac |= 16; + if (!(af & SHF_WRITE)) + ac |= 8; + if (af & SHF_EXECINSTR) + ac |= 4; + if (a->header.sh_type != SHT_NOBITS) + ac |= 2; + + return ac; +} + +static void +obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec) +{ + struct obj_section **p; + int prio = obj_load_order_prio(sec); + for (p = f->load_order_search_start; *p; p = &(*p)->load_next) + if (obj_load_order_prio(*p) < prio) + break; + sec->load_next = *p; + *p = sec; +} + +static struct obj_section *obj_create_alloced_section(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size) +{ + int newidx = f->header.e_shnum++; + struct obj_section *sec; + + f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); + f->sections[newidx] = sec = arch_new_section(); + + memset(sec, 0, sizeof(*sec)); + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->header.sh_size = size; + sec->header.sh_addralign = align; + sec->name = name; + sec->idx = newidx; + if (size) + sec->contents = xmalloc(size); + + obj_insert_section_load_order(f, sec); + + return sec; +} + +static struct obj_section *obj_create_alloced_section_first(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size) +{ + int newidx = f->header.e_shnum++; + struct obj_section *sec; + + f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); + f->sections[newidx] = sec = arch_new_section(); + + memset(sec, 0, sizeof(*sec)); + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->header.sh_size = size; + sec->header.sh_addralign = align; + sec->name = name; + sec->idx = newidx; + if (size) + sec->contents = xmalloc(size); + + sec->load_next = f->load_order; + f->load_order = sec; + if (f->load_order_search_start == &f->load_order) + f->load_order_search_start = &sec->load_next; + + return sec; +} + +static void *obj_extend_section(struct obj_section *sec, unsigned long more) +{ + unsigned long oldsize = sec->header.sh_size; + if (more) { + sec->contents = xrealloc(sec->contents, sec->header.sh_size += more); + } + return sec->contents + oldsize; +} + + +/* Conditionally add the symbols from the given symbol set to the + new module. */ + +static int +add_symbols_from( struct obj_file *f, + int idx, struct new_module_symbol *syms, size_t nsyms) +{ + struct new_module_symbol *s; + size_t i; + int used = 0; +#ifdef SYMBOL_PREFIX + char *name_buf = 0; + size_t name_alloced_size = 0; +#endif +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE + int gpl; + + gpl = obj_gpl_license(f, NULL) == 0; +#endif + for (i = 0, s = syms; i < nsyms; ++i, ++s) { + /* Only add symbols that are already marked external. + If we override locals we may cause problems for + argument initialization. We will also create a false + dependency on the module. */ + struct obj_symbol *sym; + char *name; + + /* GPL licensed modules can use symbols exported with + * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the + * exported names. Non-GPL modules never see any GPLONLY_ + * symbols so they cannot fudge it by adding the prefix on + * their references. + */ + if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) { +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE + if (gpl) + s->name += 8; + else +#endif + continue; + } + name = (char *)s->name; + +#ifdef SYMBOL_PREFIX + /* Prepend SYMBOL_PREFIX to the symbol's name (the + kernel exports `C names', but module object files + reference `linker names'). */ + size_t extra = sizeof SYMBOL_PREFIX; + size_t name_size = strlen (name) + extra; + if (name_size > name_alloced_size) { + name_alloced_size = name_size * 2; + name_buf = alloca (name_alloced_size); + } + strcpy (name_buf, SYMBOL_PREFIX); + strcpy (name_buf + extra - 1, name); + name = name_buf; +#endif /* SYMBOL_PREFIX */ + + sym = obj_find_symbol(f, name); + if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) { +#ifdef SYMBOL_PREFIX + /* Put NAME_BUF into more permanent storage. */ + name = xmalloc (name_size); + strcpy (name, name_buf); +#endif + sym = obj_add_symbol(f, name, -1, + ELF_ST_INFO(STB_GLOBAL, + STT_NOTYPE), + idx, s->value, 0); + /* Did our symbol just get installed? If so, mark the + module as "used". */ + if (sym->secidx == idx) + used = 1; + } + } + + return used; +} + +static void add_kernel_symbols(struct obj_file *f) +{ + struct external_module *m; + int i, nused = 0; + + /* Add module symbols first. */ + + for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) + if (m->nsyms + && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, + m->nsyms)) m->used = 1, ++nused; + + n_ext_modules_used = nused; + + /* And finally the symbols from the kernel proper. */ + + if (nksyms) + add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms); +} + +static char *get_modinfo_value(struct obj_file *f, const char *key) +{ + struct obj_section *sec; + char *p, *v, *n, *ep; + size_t klen = strlen(key); + + sec = obj_find_section(f, ".modinfo"); + if (sec == NULL) + return NULL; + p = sec->contents; + ep = p + sec->header.sh_size; + while (p < ep) { + v = strchr(p, '='); + n = strchr(p, '\0'); + if (v) { + if (p + klen == v && strncmp(p, key, klen) == 0) + return v + 1; + } else { + if (p + klen == n && strcmp(p, key) == 0) + return n; + } + p = n + 1; + } + + return NULL; +} + + +/*======================================================================*/ +/* Functions relating to module loading after 2.1.18. */ + +static int +new_process_module_arguments(struct obj_file *f, int argc, char **argv) +{ + while (argc > 0) { + char *p, *q, *key, *sym_name; + struct obj_symbol *sym; + char *contents, *loc; + int min, max, n; + + p = *argv; + if ((q = strchr(p, '=')) == NULL) { + argc--; + continue; + } + + key = alloca(q - p + 6); + memcpy(key, "parm_", 5); + memcpy(key + 5, p, q - p); + key[q - p + 5] = 0; + + p = get_modinfo_value(f, key); + key += 5; + if (p == NULL) { + bb_error_msg("invalid parameter %s", key); + return 0; + } + +#ifdef SYMBOL_PREFIX + sym_name = alloca (strlen (key) + sizeof SYMBOL_PREFIX); + strcpy (sym_name, SYMBOL_PREFIX); + strcat (sym_name, key); +#else + sym_name = key; +#endif + sym = obj_find_symbol(f, sym_name); + + /* Also check that the parameter was not resolved from the kernel. */ + if (sym == NULL || sym->secidx > SHN_HIRESERVE) { + bb_error_msg("symbol for parameter %s not found", key); + return 0; + } + + if (isdigit(*p)) { + min = strtoul(p, &p, 10); + if (*p == '-') + max = strtoul(p + 1, &p, 10); + else + max = min; + } else + min = max = 1; + + contents = f->sections[sym->secidx]->contents; + loc = contents + sym->value; + n = (*++q != '\0'); + + while (1) { + if ((*p == 's') || (*p == 'c')) { + char *str; + + /* Do C quoting if we begin with a ", else slurp the lot. */ + if (*q == '"') { + char *r; + + str = alloca(strlen(q)); + for (r = str, q++; *q != '"'; ++q, ++r) { + if (*q == '\0') { + bb_error_msg("improperly terminated string argument for %s", + key); + return 0; + } else if (*q == '\\') + switch (*++q) { + case 'a': + *r = '\a'; + break; + case 'b': + *r = '\b'; + break; + case 'e': + *r = '\033'; + break; + case 'f': + *r = '\f'; + break; + case 'n': + *r = '\n'; + break; + case 'r': + *r = '\r'; + break; + case 't': + *r = '\t'; + break; + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + { + int c = *q - '0'; + if (q[1] >= '0' && q[1] <= '7') { + c = (c * 8) + *++q - '0'; + if (q[1] >= '0' && q[1] <= '7') + c = (c * 8) + *++q - '0'; + } + *r = c; + } + break; + + default: + *r = *q; + break; + } else + *r = *q; + } + *r = '\0'; + ++q; + } else { + char *r; + + /* In this case, the string is not quoted. We will break + it using the coma (like for ints). If the user wants to + include comas in a string, he just has to quote it */ + + /* Search the next coma */ + r = strchr(q, ','); + + /* Found ? */ + if (r != (char *) NULL) { + /* Recopy the current field */ + str = alloca(r - q + 1); + memcpy(str, q, r - q); + + /* I don't know if it is useful, as the previous case + doesn't nul terminate the string ??? */ + str[r - q] = '\0'; + + /* Keep next fields */ + q = r; + } else { + /* last string */ + str = q; + q = ""; + } + } + + if (*p == 's') { + /* Normal string */ + obj_string_patch(f, sym->secidx, loc - contents, str); + loc += tgt_sizeof_char_p; + } else { + /* Array of chars (in fact, matrix !) */ + unsigned long charssize; /* size of each member */ + + /* Get the size of each member */ + /* Probably we should do that outside the loop ? */ + if (!isdigit(*(p + 1))) { + bb_error_msg("parameter type 'c' for %s must be followed by" + " the maximum size", key); + return 0; + } + charssize = strtoul(p + 1, (char **) NULL, 10); + + /* Check length */ + if (strlen(str) >= charssize) { + bb_error_msg("string too long for %s (max %ld)", key, + charssize - 1); + return 0; + } + + /* Copy to location */ + strcpy((char *) loc, str); + loc += charssize; + } + } else { + long v = strtoul(q, &q, 0); + switch (*p) { + case 'b': + *loc++ = v; + break; + case 'h': + *(short *) loc = v; + loc += tgt_sizeof_short; + break; + case 'i': + *(int *) loc = v; + loc += tgt_sizeof_int; + break; + case 'l': + *(long *) loc = v; + loc += tgt_sizeof_long; + break; + + default: + bb_error_msg("unknown parameter type '%c' for %s", *p, key); + return 0; + } + } + +retry_end_of_value: + switch (*q) { + case '\0': + goto end_of_arg; + + case ' ': + case '\t': + case '\n': + case '\r': + ++q; + goto retry_end_of_value; + + case ',': + if (++n > max) { + bb_error_msg("too many values for %s (max %d)", key, max); + return 0; + } + ++q; + break; + + default: + bb_error_msg("invalid argument syntax for %s", key); + return 0; + } + } + +end_of_arg: + if (n < min) { + bb_error_msg("too few values for %s (min %d)", key, min); + return 0; + } + + argc--, argv++; + } + + return 1; +} + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +static int new_is_module_checksummed(struct obj_file *f) +{ + const char *p = get_modinfo_value(f, "using_checksums"); + if (p) + return xatoi(p); + else + return 0; +} + +/* Get the module's kernel version in the canonical integer form. */ + +static int +new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) +{ + char *p, *q; + int a, b, c; + + p = get_modinfo_value(f, "kernel_version"); + if (p == NULL) + return -1; + safe_strncpy(str, p, STRVERSIONLEN); + + a = strtoul(p, &p, 10); + if (*p != '.') + return -1; + b = strtoul(p + 1, &p, 10); + if (*p != '.') + return -1; + c = strtoul(p + 1, &q, 10); + if (p + 1 == q) + return -1; + + return a << 16 | b << 8 | c; +} + +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + +/* Fetch the loaded modules, and all currently exported symbols. */ + +static int new_get_kernel_symbols(void) +{ + char *module_names, *mn; + struct external_module *modules, *m; + struct new_module_symbol *syms, *s; + size_t ret, bufsize, nmod, nsyms, i, j; + + /* Collect the loaded modules. */ + + module_names = xmalloc(bufsize = 256); +retry_modules_load: + if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) { + if (errno == ENOSPC && bufsize < ret) { + module_names = xrealloc(module_names, bufsize = ret); + goto retry_modules_load; + } + bb_perror_msg("QM_MODULES"); + return 0; + } + + n_ext_modules = nmod = ret; + + /* Collect the modules' symbols. */ + + if (nmod) { + ext_modules = modules = xmalloc(nmod * sizeof(*modules)); + memset(modules, 0, nmod * sizeof(*modules)); + for (i = 0, mn = module_names, m = modules; + i < nmod; ++i, ++m, mn += strlen(mn) + 1) { + struct new_module_info info; + + if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) { + if (errno == ENOENT) { + /* The module was removed out from underneath us. */ + continue; + } + bb_perror_msg("query_module: QM_INFO: %s", mn); + return 0; + } + + syms = xmalloc(bufsize = 1024); +retry_mod_sym_load: + if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) { + switch (errno) { + case ENOSPC: + syms = xrealloc(syms, bufsize = ret); + goto retry_mod_sym_load; + case ENOENT: + /* The module was removed out from underneath us. */ + continue; + default: + bb_perror_msg("query_module: QM_SYMBOLS: %s", mn); + return 0; + } + } + nsyms = ret; + + m->name = mn; + m->addr = info.addr; + m->nsyms = nsyms; + m->syms = syms; + + for (j = 0, s = syms; j < nsyms; ++j, ++s) { + s->name += (unsigned long) syms; + } + } + } + + /* Collect the kernel's symbols. */ + + syms = xmalloc(bufsize = 16 * 1024); +retry_kern_sym_load: + if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) { + if (errno == ENOSPC && bufsize < ret) { + syms = xrealloc(syms, bufsize = ret); + goto retry_kern_sym_load; + } + bb_perror_msg("kernel: QM_SYMBOLS"); + return 0; + } + nksyms = nsyms = ret; + ksyms = syms; + + for (j = 0, s = syms; j < nsyms; ++j, ++s) { + s->name += (unsigned long) syms; + } + return 1; +} + + +/* Return the kernel symbol checksum version, or zero if not used. */ + +static int new_is_kernel_checksummed(void) +{ + struct new_module_symbol *s; + size_t i; + + /* Using_Versions is not the first symbol, but it should be in there. */ + + for (i = 0, s = ksyms; i < nksyms; ++i, ++s) + if (strcmp((char *) s->name, "Using_Versions") == 0) + return s->value; + + return 0; +} + + +static int new_create_this_module(struct obj_file *f, const char *m_name) +{ + struct obj_section *sec; + + sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long, + sizeof(struct new_module)); + memset(sec->contents, 0, sizeof(struct new_module)); + + obj_add_symbol(f, SPFX "__this_module", -1, + ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0, + sizeof(struct new_module)); + + obj_string_patch(f, sec->idx, offsetof(struct new_module, name), + m_name); + + return 1; +} + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS +/* add an entry to the __ksymtab section, creating it if necessary */ +static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym) +{ + struct obj_section *sec; + ElfW(Addr) ofs; + + /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section. + * If __ksymtab is defined but not marked alloc, x out the first character + * (no obj_delete routine) and create a new __ksymtab with the correct + * characteristics. + */ + sec = obj_find_section(f, "__ksymtab"); + if (sec && !(sec->header.sh_flags & SHF_ALLOC)) { + *((char *)(sec->name)) = 'x'; /* override const */ + sec = NULL; + } + if (!sec) + sec = obj_create_alloced_section(f, "__ksymtab", + tgt_sizeof_void_p, 0); + if (!sec) + return; + sec->header.sh_flags |= SHF_ALLOC; + /* Empty section might be byte-aligned */ + sec->header.sh_addralign = tgt_sizeof_void_p; + ofs = sec->header.sh_size; + obj_symbol_patch(f, sec->idx, ofs, sym); + obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name); + obj_extend_section(sec, 2 * tgt_sizeof_char_p); +} +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + +static int new_create_module_ksymtab(struct obj_file *f) +{ + struct obj_section *sec; + int i; + + /* We must always add the module references. */ + + if (n_ext_modules_used) { + struct new_module_ref *dep; + struct obj_symbol *tm; + + sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p, + (sizeof(struct new_module_ref) + * n_ext_modules_used)); + if (!sec) + return 0; + + tm = obj_find_symbol(f, SPFX "__this_module"); + dep = (struct new_module_ref *) sec->contents; + for (i = 0; i < n_ext_modules; ++i) + if (ext_modules[i].used) { + dep->dep = ext_modules[i].addr; + obj_symbol_patch(f, sec->idx, + (char *) &dep->ref - sec->contents, tm); + dep->next_ref = 0; + ++dep; + } + } + + if (!flag_noexport && !obj_find_section(f, "__ksymtab")) { + size_t nsyms; + int *loaded; + + sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0); + + /* We don't want to export symbols residing in sections that + aren't loaded. There are a number of these created so that + we make sure certain module options don't appear twice. */ + + loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); + while (--i >= 0) + loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; + + for (nsyms = i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (ELF_ST_BIND(sym->info) != STB_LOCAL + && sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE + || loaded[sym->secidx])) { + ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p; + + obj_symbol_patch(f, sec->idx, ofs, sym); + obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, + sym->name); + + nsyms++; + } + } + + obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p); + } + + return 1; +} + + +static int +new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size) +{ + struct new_module *module; + struct obj_section *sec; + void *image; + int ret; + tgt_long m_addr; + + sec = obj_find_section(f, ".this"); + if (!sec || !sec->contents) { + bb_perror_msg_and_die("corrupt module %s?",m_name); + } + module = (struct new_module *) sec->contents; + m_addr = sec->header.sh_addr; + + module->size_of_struct = sizeof(*module); + module->size = m_size; + module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0; + + sec = obj_find_section(f, "__ksymtab"); + if (sec && sec->header.sh_size) { + module->syms = sec->header.sh_addr; + module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p); + } + + if (n_ext_modules_used) { + sec = obj_find_section(f, ".kmodtab"); + module->deps = sec->header.sh_addr; + module->ndeps = n_ext_modules_used; + } + + module->init = + obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module")); + module->cleanup = + obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module")); + + sec = obj_find_section(f, "__ex_table"); + if (sec) { + module->ex_table_start = sec->header.sh_addr; + module->ex_table_end = sec->header.sh_addr + sec->header.sh_size; + } + + sec = obj_find_section(f, ".text.init"); + if (sec) { + module->runsize = sec->header.sh_addr - m_addr; + } + sec = obj_find_section(f, ".data.init"); + if (sec) { + if (!module->runsize || + module->runsize > sec->header.sh_addr - m_addr) + module->runsize = sec->header.sh_addr - m_addr; + } + sec = obj_find_section(f, ARCHDATA_SEC_NAME); + if (sec && sec->header.sh_size) { + module->archdata_start = (void*)sec->header.sh_addr; + module->archdata_end = module->archdata_start + sec->header.sh_size; + } + sec = obj_find_section(f, KALLSYMS_SEC_NAME); + if (sec && sec->header.sh_size) { + module->kallsyms_start = (void*)sec->header.sh_addr; + module->kallsyms_end = module->kallsyms_start + sec->header.sh_size; + } + + /* Whew! All of the initialization is complete. Collect the final + module image and give it to the kernel. */ + + image = xmalloc(m_size); + obj_create_image(f, image); + + ret = init_module(m_name, (struct new_module *) image); + if (ret) + bb_perror_msg("init_module: %s", m_name); + + free(image); + + return ret == 0; +} + + +/*======================================================================*/ + +static int +obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + const char *string) +{ + struct obj_string_patch *p; + struct obj_section *strsec; + size_t len = strlen(string) + 1; + char *loc; + + p = xmalloc(sizeof(*p)); + p->next = f->string_patches; + p->reloc_secidx = secidx; + p->reloc_offset = offset; + f->string_patches = p; + + strsec = obj_find_section(f, ".kstrtab"); + if (strsec == NULL) { + strsec = obj_create_alloced_section(f, ".kstrtab", 1, len); + p->string_offset = 0; + loc = strsec->contents; + } else { + p->string_offset = strsec->header.sh_size; + loc = obj_extend_section(strsec, len); + } + memcpy(loc, string, len); + + return 1; +} + +static int +obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + struct obj_symbol *sym) +{ + struct obj_symbol_patch *p; + + p = xmalloc(sizeof(*p)); + p->next = f->symbol_patches; + p->reloc_secidx = secidx; + p->reloc_offset = offset; + p->sym = sym; + f->symbol_patches = p; + + return 1; +} + +static int obj_check_undefineds(struct obj_file *f) +{ + unsigned long i; + int ret = 1; + + for (i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx == SHN_UNDEF) { + if (ELF_ST_BIND(sym->info) == STB_WEAK) { + sym->secidx = SHN_ABS; + sym->value = 0; + } else { + if (!flag_quiet) { + bb_error_msg("unresolved symbol %s", sym->name); + } + ret = 0; + } + } + } + + return ret; +} + +static void obj_allocate_commons(struct obj_file *f) +{ + struct common_entry { + struct common_entry *next; + struct obj_symbol *sym; + } *common_head = NULL; + + unsigned long i; + + for (i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx == SHN_COMMON) { + /* Collect all COMMON symbols and sort them by size so as to + minimize space wasted by alignment requirements. */ + { + struct common_entry **p, *n; + for (p = &common_head; *p; p = &(*p)->next) + if (sym->size <= (*p)->sym->size) + break; + + n = alloca(sizeof(*n)); + n->next = *p; + n->sym = sym; + *p = n; + } + } + } + + for (i = 1; i < f->local_symtab_size; ++i) { + struct obj_symbol *sym = f->local_symtab[i]; + if (sym && sym->secidx == SHN_COMMON) { + struct common_entry **p, *n; + for (p = &common_head; *p; p = &(*p)->next) + if (sym == (*p)->sym) + break; + else if (sym->size < (*p)->sym->size) { + n = alloca(sizeof(*n)); + n->next = *p; + n->sym = sym; + *p = n; + break; + } + } + } + + if (common_head) { + /* Find the bss section. */ + for (i = 0; i < f->header.e_shnum; ++i) + if (f->sections[i]->header.sh_type == SHT_NOBITS) + break; + + /* If for some reason there hadn't been one, create one. */ + if (i == f->header.e_shnum) { + struct obj_section *sec; + + f->sections = xrealloc(f->sections, (i + 1) * sizeof(sec)); + f->sections[i] = sec = arch_new_section(); + f->header.e_shnum = i + 1; + + memset(sec, 0, sizeof(*sec)); + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->name = ".bss"; + sec->idx = i; + } + + /* Allocate the COMMONS. */ + { + ElfW(Addr) bss_size = f->sections[i]->header.sh_size; + ElfW(Addr) max_align = f->sections[i]->header.sh_addralign; + struct common_entry *c; + + for (c = common_head; c; c = c->next) { + ElfW(Addr) align = c->sym->value; + + if (align > max_align) + max_align = align; + if (bss_size & (align - 1)) + bss_size = (bss_size | (align - 1)) + 1; + + c->sym->secidx = i; + c->sym->value = bss_size; + + bss_size += c->sym->size; + } + + f->sections[i]->header.sh_size = bss_size; + f->sections[i]->header.sh_addralign = max_align; + } + } + + /* For the sake of patch relocation and parameter initialization, + allocate zeroed data for NOBITS sections now. Note that after + this we cannot assume NOBITS are really empty. */ + for (i = 0; i < f->header.e_shnum; ++i) { + struct obj_section *s = f->sections[i]; + if (s->header.sh_type == SHT_NOBITS) { + if (s->header.sh_size != 0) + s->contents = memset(xmalloc(s->header.sh_size), + 0, s->header.sh_size); + else + s->contents = NULL; + + s->header.sh_type = SHT_PROGBITS; + } + } +} + +static unsigned long obj_load_size(struct obj_file *f) +{ + unsigned long dot = 0; + struct obj_section *sec; + + /* Finalize the positions of the sections relative to one another. */ + + for (sec = f->load_order; sec; sec = sec->load_next) { + ElfW(Addr) align; + + align = sec->header.sh_addralign; + if (align && (dot & (align - 1))) + dot = (dot | (align - 1)) + 1; + + sec->header.sh_addr = dot; + dot += sec->header.sh_size; + } + + return dot; +} + +static int obj_relocate(struct obj_file *f, ElfW(Addr) base) +{ + int i, n = f->header.e_shnum; + int ret = 1; + + /* Finalize the addresses of the sections. */ + + f->baseaddr = base; + for (i = 0; i < n; ++i) + f->sections[i]->header.sh_addr += base; + + /* And iterate over all of the relocations. */ + + for (i = 0; i < n; ++i) { + struct obj_section *relsec, *symsec, *targsec, *strsec; + ElfW(RelM) * rel, *relend; + ElfW(Sym) * symtab; + const char *strtab; + + relsec = f->sections[i]; + if (relsec->header.sh_type != SHT_RELM) + continue; + + symsec = f->sections[relsec->header.sh_link]; + targsec = f->sections[relsec->header.sh_info]; + strsec = f->sections[symsec->header.sh_link]; + + rel = (ElfW(RelM) *) relsec->contents; + relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); + symtab = (ElfW(Sym) *) symsec->contents; + strtab = (const char *) strsec->contents; + + for (; rel < relend; ++rel) { + ElfW(Addr) value = 0; + struct obj_symbol *intsym = NULL; + unsigned long symndx; + ElfW(Sym) * extsym = 0; + const char *errmsg; + + /* Attempt to find a value to use for this relocation. */ + + symndx = ELF_R_SYM(rel->r_info); + if (symndx) { + /* Note we've already checked for undefined symbols. */ + + extsym = &symtab[symndx]; + if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) { + /* Local symbols we look up in the local table to be sure + we get the one that is really intended. */ + intsym = f->local_symtab[symndx]; + } else { + /* Others we look up in the hash table. */ + const char *name; + if (extsym->st_name) + name = strtab + extsym->st_name; + else + name = f->sections[extsym->st_shndx]->name; + intsym = obj_find_symbol(f, name); + } + + value = obj_symbol_final_value(f, intsym); + intsym->referenced = 1; + } +#if SHT_RELM == SHT_RELA +#if defined(__alpha__) && defined(AXP_BROKEN_GAS) + /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */ + if (!extsym || !extsym->st_name || + ELF_ST_BIND(extsym->st_info) != STB_LOCAL) +#endif + value += rel->r_addend; +#endif + + /* Do it! */ + switch (arch_apply_relocation + (f, targsec, symsec, intsym, rel, value) + ) { + case obj_reloc_ok: + break; + + case obj_reloc_overflow: + errmsg = "Relocation overflow"; + goto bad_reloc; + case obj_reloc_dangerous: + errmsg = "Dangerous relocation"; + goto bad_reloc; + case obj_reloc_unhandled: + errmsg = "Unhandled relocation"; +bad_reloc: + if (extsym) { + bb_error_msg("%s of type %ld for %s", errmsg, + (long) ELF_R_TYPE(rel->r_info), + strtab + extsym->st_name); + } else { + bb_error_msg("%s of type %ld", errmsg, + (long) ELF_R_TYPE(rel->r_info)); + } + ret = 0; + break; + } + } + } + + /* Finally, take care of the patches. */ + + if (f->string_patches) { + struct obj_string_patch *p; + struct obj_section *strsec; + ElfW(Addr) strsec_base; + strsec = obj_find_section(f, ".kstrtab"); + strsec_base = strsec->header.sh_addr; + + for (p = f->string_patches; p; p = p->next) { + struct obj_section *targsec = f->sections[p->reloc_secidx]; + *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) + = strsec_base + p->string_offset; + } + } + + if (f->symbol_patches) { + struct obj_symbol_patch *p; + + for (p = f->symbol_patches; p; p = p->next) { + struct obj_section *targsec = f->sections[p->reloc_secidx]; + *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) + = obj_symbol_final_value(f, p->sym); + } + } + + return ret; +} + +static int obj_create_image(struct obj_file *f, char *image) +{ + struct obj_section *sec; + ElfW(Addr) base = f->baseaddr; + + for (sec = f->load_order; sec; sec = sec->load_next) { + char *secimg; + + if (sec->contents == 0 || sec->header.sh_size == 0) + continue; + + secimg = image + (sec->header.sh_addr - base); + + /* Note that we allocated data for NOBITS sections earlier. */ + memcpy(secimg, sec->contents, sec->header.sh_size); + } + + return 1; +} + +/*======================================================================*/ + +static struct obj_file *obj_load(FILE * fp, int loadprogbits) +{ + struct obj_file *f; + ElfW(Shdr) * section_headers; + int shnum, i; + char *shstrtab; + + /* Read the file header. */ + + f = arch_new_file(); + memset(f, 0, sizeof(*f)); + f->symbol_cmp = strcmp; + f->symbol_hash = obj_elf_hash; + f->load_order_search_start = &f->load_order; + + fseek(fp, 0, SEEK_SET); + if (fread(&f->header, sizeof(f->header), 1, fp) != 1) { + bb_perror_msg("error reading ELF header"); + return NULL; + } + + if (f->header.e_ident[EI_MAG0] != ELFMAG0 + || f->header.e_ident[EI_MAG1] != ELFMAG1 + || f->header.e_ident[EI_MAG2] != ELFMAG2 + || f->header.e_ident[EI_MAG3] != ELFMAG3) { + bb_error_msg("not an ELF file"); + return NULL; + } + if (f->header.e_ident[EI_CLASS] != ELFCLASSM + || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN + ? ELFDATA2MSB : ELFDATA2LSB) + || f->header.e_ident[EI_VERSION] != EV_CURRENT + || !MATCH_MACHINE(f->header.e_machine)) { + bb_error_msg("ELF file not for this architecture"); + return NULL; + } + if (f->header.e_type != ET_REL) { + bb_error_msg("ELF file not a relocatable object"); + return NULL; + } + + /* Read the section headers. */ + + if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { + bb_error_msg("section header size mismatch: %lu != %lu", + (unsigned long) f->header.e_shentsize, + (unsigned long) sizeof(ElfW(Shdr))); + return NULL; + } + + shnum = f->header.e_shnum; + f->sections = xmalloc(sizeof(struct obj_section *) * shnum); + memset(f->sections, 0, sizeof(struct obj_section *) * shnum); + + section_headers = alloca(sizeof(ElfW(Shdr)) * shnum); + fseek(fp, f->header.e_shoff, SEEK_SET); + if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) { + bb_perror_msg("error reading ELF section headers"); + return NULL; + } + + /* Read the section data. */ + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec; + + f->sections[i] = sec = arch_new_section(); + memset(sec, 0, sizeof(*sec)); + + sec->header = section_headers[i]; + sec->idx = i; + + if(sec->header.sh_size) { + switch (sec->header.sh_type) { + case SHT_NULL: + case SHT_NOTE: + case SHT_NOBITS: + /* ignore */ + break; + + case SHT_PROGBITS: +#if LOADBITS + if (!loadprogbits) { + sec->contents = NULL; + break; + } +#endif + case SHT_SYMTAB: + case SHT_STRTAB: + case SHT_RELM: + if (sec->header.sh_size > 0) { + sec->contents = xmalloc(sec->header.sh_size); + fseek(fp, sec->header.sh_offset, SEEK_SET); + if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { + bb_perror_msg("error reading ELF section data"); + return NULL; + } + } else { + sec->contents = NULL; + } + break; + +#if SHT_RELM == SHT_REL + case SHT_RELA: + bb_error_msg("RELA relocations not supported on this architecture"); + return NULL; +#else + case SHT_REL: + bb_error_msg("REL relocations not supported on this architecture"); + return NULL; +#endif + + default: + if (sec->header.sh_type >= SHT_LOPROC) { + /* Assume processor specific section types are debug + info and can safely be ignored. If this is ever not + the case (Hello MIPS?), don't put ifdefs here but + create an arch_load_proc_section(). */ + break; + } + + bb_error_msg("can't handle sections of type %ld", + (long) sec->header.sh_type); + return NULL; + } + } + } + + /* Do what sort of interpretation as needed by each section. */ + + shstrtab = f->sections[f->header.e_shstrndx]->contents; + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec = f->sections[i]; + sec->name = shstrtab + sec->header.sh_name; + } + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec = f->sections[i]; + + /* .modinfo should be contents only but gcc has no attribute for that. + * The kernel may have marked .modinfo as ALLOC, ignore this bit. + */ + if (strcmp(sec->name, ".modinfo") == 0) + sec->header.sh_flags &= ~SHF_ALLOC; + + if (sec->header.sh_flags & SHF_ALLOC) + obj_insert_section_load_order(f, sec); + + switch (sec->header.sh_type) { + case SHT_SYMTAB: + { + unsigned long nsym, j; + char *strtab; + ElfW(Sym) * sym; + + if (sec->header.sh_entsize != sizeof(ElfW(Sym))) { + bb_error_msg("symbol size mismatch: %lu != %lu", + (unsigned long) sec->header.sh_entsize, + (unsigned long) sizeof(ElfW(Sym))); + return NULL; + } + + nsym = sec->header.sh_size / sizeof(ElfW(Sym)); + strtab = f->sections[sec->header.sh_link]->contents; + sym = (ElfW(Sym) *) sec->contents; + + /* Allocate space for a table of local symbols. */ + j = f->local_symtab_size = sec->header.sh_info; + f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *)); + + /* Insert all symbols into the hash table. */ + for (j = 1, ++sym; j < nsym; ++j, ++sym) { + ElfW(Addr) val = sym->st_value; + const char *name; + if (sym->st_name) + name = strtab + sym->st_name; + else if (sym->st_shndx < shnum) + name = f->sections[sym->st_shndx]->name; + else + continue; +#if defined(__SH5__) + /* + * For sh64 it is possible that the target of a branch + * requires a mode switch (32 to 16 and back again). + * + * This is implied by the lsb being set in the target + * address for SHmedia mode and clear for SHcompact. + */ + val |= sym->st_other & 4; +#endif + + obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx, + val, sym->st_size); + } + } + break; + + case SHT_RELM: + if (sec->header.sh_entsize != sizeof(ElfW(RelM))) { + bb_error_msg("relocation entry size mismatch: %lu != %lu", + (unsigned long) sec->header.sh_entsize, + (unsigned long) sizeof(ElfW(RelM))); + return NULL; + } + break; + /* XXX Relocation code from modutils-2.3.19 is not here. + * Why? That's about 20 lines of code from obj/obj_load.c, + * which gets done in a second pass through the sections. + * This BusyBox insmod does similar work in obj_relocate(). */ + } + } + + return f; +} + +#if ENABLE_FEATURE_INSMOD_LOADINKMEM +/* + * load the unloaded sections directly into the memory allocated by + * kernel for the module + */ + +static int obj_load_progbits(FILE * fp, struct obj_file* f, char* imagebase) +{ + ElfW(Addr) base = f->baseaddr; + struct obj_section* sec; + + for (sec = f->load_order; sec; sec = sec->load_next) { + + /* section already loaded? */ + if (sec->contents != NULL) + continue; + + if (sec->header.sh_size == 0) + continue; + + sec->contents = imagebase + (sec->header.sh_addr - base); + fseek(fp, sec->header.sh_offset, SEEK_SET); + if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { + bb_perror_msg("error reading ELF section data"); + return 0; + } + + } + return 1; +} +#endif + +static void hide_special_symbols(struct obj_file *f) +{ + static const char *const specials[] = { + SPFX "cleanup_module", + SPFX "init_module", + SPFX "kernel_version", + NULL + }; + + struct obj_symbol *sym; + const char *const *p; + + for (p = specials; *p; ++p) { + sym = obj_find_symbol(f, *p); + if (sym != NULL) + sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info)); + } +} + + +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE +static int obj_gpl_license(struct obj_file *f, const char **license) +{ + struct obj_section *sec; + /* This list must match *exactly* the list of allowable licenses in + * linux/include/linux/module.h. Checking for leading "GPL" will not + * work, somebody will use "GPL sucks, this is proprietary". + */ + static const char * const gpl_licenses[] = { + "GPL", + "GPL v2", + "GPL and additional rights", + "Dual BSD/GPL", + "Dual MPL/GPL", + }; + + sec = obj_find_section(f, ".modinfo"); + if (sec) { + const char *value, *ptr, *endptr; + ptr = sec->contents; + endptr = ptr + sec->header.sh_size; + while (ptr < endptr) { + value = strchr(ptr, '='); + if (value && strncmp(ptr, "license", value-ptr) == 0) { + int i; + if (license) + *license = value+1; + for (i = 0; i < sizeof(gpl_licenses)/sizeof(gpl_licenses[0]); ++i) { + if (strcmp(value+1, gpl_licenses[i]) == 0) + return 0; + } + return 2; + } + if (strchr(ptr, '\0')) + ptr = strchr(ptr, '\0') + 1; + else + ptr = endptr; + } + } + return 1; +} + +#define TAINT_FILENAME "/proc/sys/kernel/tainted" +#define TAINT_PROPRIETORY_MODULE (1<<0) +#define TAINT_FORCED_MODULE (1<<1) +#define TAINT_UNSAFE_SMP (1<<2) +#define TAINT_URL "http://www.tux.org/lkml/#export-tainted" + +static void set_tainted(struct obj_file *f, int fd, char *m_name, + int kernel_has_tainted, int taint, const char *text1, const char *text2) +{ + char buf[80]; + int oldval; + static int first = 1; + if (fd < 0 && !kernel_has_tainted) + return; /* New modutils on old kernel */ + printf("Warning: loading %s will taint the kernel: %s%s\n", + m_name, text1, text2); + if (first) { + printf(" See %s for information about tainted modules\n", TAINT_URL); + first = 0; + } + if (fd >= 0) { + read(fd, buf, sizeof(buf)-1); + buf[sizeof(buf)-1] = '\0'; + oldval = strtoul(buf, NULL, 10); + sprintf(buf, "%d\n", oldval | taint); + write(fd, buf, strlen(buf)); + } +} + +/* Check if loading this module will taint the kernel. */ +static void check_tainted_module(struct obj_file *f, char *m_name) +{ + static const char tainted_file[] = TAINT_FILENAME; + int fd, kernel_has_tainted; + const char *ptr; + + kernel_has_tainted = 1; + fd = open(tainted_file, O_RDWR); + if (fd < 0) { + if (errno == ENOENT) + kernel_has_tainted = 0; + else if (errno == EACCES) + kernel_has_tainted = 1; + else { + perror(tainted_file); + kernel_has_tainted = 0; + } + } + + switch (obj_gpl_license(f, &ptr)) { + case 0: + break; + case 1: + set_tainted(f, fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", ""); + break; + case 2: + /* The module has a non-GPL license so we pretend that the + * kernel always has a taint flag to get a warning even on + * kernels without the proc flag. + */ + set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr); + break; + default: + set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", ""); + break; + } + + if (flag_force_load) + set_tainted(f, fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", ""); + + if (fd >= 0) + close(fd); +} +#else /* FEATURE_CHECK_TAINTED_MODULE */ +#define check_tainted_module(x, y) do { } while(0); +#endif /* FEATURE_CHECK_TAINTED_MODULE */ + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS +/* add module source, timestamp, kernel version and a symbol for the + * start of some sections. this info is used by ksymoops to do better + * debugging. + */ +static int +get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) +{ +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + return new_get_module_version(f, str); +#else /* FEATURE_INSMOD_VERSION_CHECKING */ + strncpy(str, "???", sizeof(str)); + return -1; +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ +} + +/* add module source, timestamp, kernel version and a symbol for the + * start of some sections. this info is used by ksymoops to do better + * debugging. + */ +static void +add_ksymoops_symbols(struct obj_file *f, const char *filename, + const char *m_name) +{ + static const char symprefix[] = "__insmod_"; + struct obj_section *sec; + struct obj_symbol *sym; + char *name, *absolute_filename; + char str[STRVERSIONLEN], real[PATH_MAX]; + int i, l, lm_name, lfilename, use_ksymtab, version; + struct stat statbuf; + + static const char *section_names[] = { + ".text", + ".rodata", + ".data", + ".bss", + ".sbss" + }; + + if (realpath(filename, real)) { + absolute_filename = xstrdup(real); + } + else { + int save_errno = errno; + bb_error_msg("cannot get realpath for %s", filename); + errno = save_errno; + perror(""); + absolute_filename = xstrdup(filename); + } + + lm_name = strlen(m_name); + lfilename = strlen(absolute_filename); + + /* add to ksymtab if it already exists or there is no ksymtab and other symbols + * are not to be exported. otherwise leave ksymtab alone for now, the + * "export all symbols" compatibility code will export these symbols later. + */ + use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport; + + if ((sec = obj_find_section(f, ".this"))) { + /* tag the module header with the object name, last modified + * timestamp and module version. worst case for module version + * is 0xffffff, decimal 16777215. putting all three fields in + * one symbol is less readable but saves kernel space. + */ + l = sizeof(symprefix)+ /* "__insmod_" */ + lm_name+ /* module name */ + 2+ /* "_O" */ + lfilename+ /* object filename */ + 2+ /* "_M" */ + 2*sizeof(statbuf.st_mtime)+ /* mtime in hex */ + 2+ /* "_V" */ + 8+ /* version in dec */ + 1; /* nul */ + name = xmalloc(l); + if (stat(absolute_filename, &statbuf) != 0) + statbuf.st_mtime = 0; + version = get_module_version(f, str); /* -1 if not found */ + snprintf(name, l, "%s%s_O%s_M%0*lX_V%d", + symprefix, m_name, absolute_filename, + (int)(2*sizeof(statbuf.st_mtime)), statbuf.st_mtime, + version); + sym = obj_add_symbol(f, name, -1, + ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } + free(absolute_filename); +#ifdef _NOT_SUPPORTED_ + /* record where the persistent data is going, same address as previous symbol */ + + if (f->persist) { + l = sizeof(symprefix)+ /* "__insmod_" */ + lm_name+ /* module name */ + 2+ /* "_P" */ + strlen(f->persist)+ /* data store */ + 1; /* nul */ + name = xmalloc(l); + snprintf(name, l, "%s%s_P%s", + symprefix, m_name, f->persist); + sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } +#endif /* _NOT_SUPPORTED_ */ + /* tag the desired sections if size is non-zero */ + + for (i = 0; i < sizeof(section_names)/sizeof(section_names[0]); ++i) { + if ((sec = obj_find_section(f, section_names[i])) && + sec->header.sh_size) { + l = sizeof(symprefix)+ /* "__insmod_" */ + lm_name+ /* module name */ + 2+ /* "_S" */ + strlen(sec->name)+ /* section name */ + 2+ /* "_L" */ + 8+ /* length in dec */ + 1; /* nul */ + name = xmalloc(l); + snprintf(name, l, "%s%s_S%s_L%ld", + symprefix, m_name, sec->name, + (long)sec->header.sh_size); + sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } + } +} +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + +#if ENABLE_FEATURE_INSMOD_LOAD_MAP +static void print_load_map(struct obj_file *f) +{ + struct obj_symbol *sym; + struct obj_symbol **all, **p; + struct obj_section *sec; + int i, nsyms, *loaded; + + /* Report on the section layout. */ + + printf("Sections: Size %-*s Align\n", + (int) (2 * sizeof(void *)), "Address"); + + for (sec = f->load_order; sec; sec = sec->load_next) { + int a; + unsigned long tmp; + + for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a) + tmp >>= 1; + if (a == -1) + a = 0; + + printf("%-15s %08lx %0*lx 2**%d\n", + sec->name, + (long)sec->header.sh_size, + (int) (2 * sizeof(void *)), + (long)sec->header.sh_addr, + a); + } +#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL + /* Quick reference which section indicies are loaded. */ + + loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); + while (--i >= 0) + loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; + + /* Collect the symbols we'll be listing. */ + + for (nsyms = i = 0; i < HASH_BUCKETS; ++i) + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])) + ++nsyms; + + all = alloca(nsyms * sizeof(struct obj_symbol *)); + + for (i = 0, p = all; i < HASH_BUCKETS; ++i) + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])) + *p++ = sym; + + /* And list them. */ + printf("\nSymbols:\n"); + for (p = all; p < all + nsyms; ++p) { + char type = '?'; + unsigned long value; + + sym = *p; + if (sym->secidx == SHN_ABS) { + type = 'A'; + value = sym->value; + } else if (sym->secidx == SHN_UNDEF) { + type = 'U'; + value = 0; + } else { + sec = f->sections[sym->secidx]; + + if (sec->header.sh_type == SHT_NOBITS) + type = 'B'; + else if (sec->header.sh_flags & SHF_ALLOC) { + if (sec->header.sh_flags & SHF_EXECINSTR) + type = 'T'; + else if (sec->header.sh_flags & SHF_WRITE) + type = 'D'; + else + type = 'R'; + } + value = sym->value + sec->header.sh_addr; + } + + if (ELF_ST_BIND(sym->info) == STB_LOCAL) + type = tolower(type); + + printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value, + type, sym->name); + } +#endif +} +#else /* !FEATURE_INSMOD_LOAD_MAP */ +void print_load_map(struct obj_file *f); +#endif + +int insmod_main( int argc, char **argv) +{ + char *opt_o, *arg1; + int len; + int k_crcs; + char *tmp, *tmp1; + unsigned long m_size; + ElfW(Addr) m_addr; + struct obj_file *f; + struct stat st; + char *m_name = 0; + int exit_status = EXIT_FAILURE; + int m_has_modinfo; +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + struct utsname uts_info; + char m_strversion[STRVERSIONLEN]; + int m_version, m_crcs; +#endif +#if ENABLE_FEATURE_CLEAN_UP + FILE *fp = 0; +#else + FILE *fp; +#endif + int k_version = 0; + struct utsname myuname; + + /* Parse any options */ + getopt32(argc, argv, OPTION_STR, &opt_o); + arg1 = argv[optind]; + if (option_mask32 & OPT_o) { // -o /* name the output module */ + free(m_name); + m_name = xstrdup(opt_o); + } + + if (arg1 == NULL) { + bb_show_usage(); + } + + /* Grab the module name */ + tmp1 = xstrdup(arg1); + tmp = basename(tmp1); + len = strlen(tmp); + + if (uname(&myuname) == 0) { + if (myuname.release[0] == '2') { + k_version = myuname.release[2] - '0'; + } + } + +#if ENABLE_FEATURE_2_6_MODULES + if (k_version > 4 && len > 3 && tmp[len - 3] == '.' + && tmp[len - 2] == 'k' && tmp[len - 1] == 'o' + ) { + len -= 3; + tmp[len] = '\0'; + } else +#endif + if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') { + len -= 2; + tmp[len] = '\0'; + } + + +#if ENABLE_FEATURE_2_6_MODULES + if (k_version > 4) + m_fullName = xasprintf("%s.ko", tmp); + else +#endif + m_fullName = xasprintf("%s.o", tmp); + + if (!m_name) { + m_name = tmp; + } else { + free(tmp1); + tmp1 = 0; /* flag for free(m_name) before exit() */ + } + + /* Get a filedesc for the module. Check we we have a complete path */ + if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode) + || (fp = fopen(arg1, "r")) == NULL + ) { + /* Hmm. Could not open it. First search under /lib/modules/`uname -r`, + * but do not error out yet if we fail to find it... */ + if (k_version) { /* uname succeedd */ + char *module_dir; + char *tmdn; + char real_module_dir[FILENAME_MAX]; + + tmdn = concat_path_file(_PATH_MODULES, myuname.release); + /* Jump through hoops in case /lib/modules/`uname -r` + * is a symlink. We do not want recursive_action to + * follow symlinks, but we do want to follow the + * /lib/modules/`uname -r` dir, So resolve it ourselves + * if it is a link... */ + if (realpath(tmdn, real_module_dir) == NULL) + module_dir = tmdn; + else + module_dir = real_module_dir; + recursive_action(module_dir, TRUE, FALSE, FALSE, + check_module_name_match, 0, m_fullName, 0); + free(tmdn); + } + + /* Check if we have found anything yet */ + if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) { + char module_dir[FILENAME_MAX]; + + free(m_filename); + m_filename = 0; + if (realpath (_PATH_MODULES, module_dir) == NULL) + strcpy(module_dir, _PATH_MODULES); + /* No module found under /lib/modules/`uname -r`, this + * time cast the net a bit wider. Search /lib/modules/ */ + if (!recursive_action(module_dir, TRUE, FALSE, FALSE, + check_module_name_match, 0, m_fullName, 0) + ) { + if (m_filename == 0 + || ((fp = fopen(m_filename, "r")) == NULL) + ) { + bb_error_msg("%s: no module by that name found", m_fullName); + goto out; + } + } else + bb_error_msg_and_die("%s: no module by that name found", m_fullName); + } + } else + m_filename = xstrdup(arg1); + + if (flag_verbose) + printf("Using %s\n", m_filename); + +#if ENABLE_FEATURE_2_6_MODULES + if (k_version > 4) { + argv[optind] = m_filename; + optind--; + return insmod_ng_main(argc - optind, argv + optind); + } +#endif + + f = obj_load(fp, LOADBITS); + if (f == NULL) + bb_perror_msg_and_die("cannot load the module"); + + if (get_modinfo_value(f, "kernel_version") == NULL) + m_has_modinfo = 0; + else + m_has_modinfo = 1; + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + /* Version correspondence? */ + if (!flag_quiet) { + if (uname(&uts_info) < 0) + uts_info.release[0] = '\0'; + if (m_has_modinfo) { + m_version = new_get_module_version(f, m_strversion); + if (m_version == -1) { + bb_error_msg("cannot find the kernel version the module was " + "compiled for"); + goto out; + } + } + + if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) { + if (flag_force_load) { + bb_error_msg("warning: kernel-module version mismatch\n" + "\t%s was compiled for kernel version %s\n" + "\twhile this kernel is version %s", + m_filename, m_strversion, uts_info.release); + } else { + bb_error_msg("kernel-module version mismatch\n" + "\t%s was compiled for kernel version %s\n" + "\twhile this kernel is version %s.", + m_filename, m_strversion, uts_info.release); + goto out; + } + } + } + k_crcs = 0; +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + if (!query_module(NULL, 0, NULL, 0, NULL)) { + if (!new_get_kernel_symbols()) + goto out; + k_crcs = new_is_kernel_checksummed(); + } else { + bb_error_msg("not configured to support old kernels"); + goto out; + } + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + m_crcs = 0; + if (m_has_modinfo) + m_crcs = new_is_module_checksummed(f); + + if (m_crcs != k_crcs) + obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash); +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + /* Let the module know about the kernel symbols. */ + add_kernel_symbols(f); + + /* Allocate common symbols, symbol tables, and string tables. */ + + if (!new_create_this_module(f, m_name)) { + goto out; + } + + if (!obj_check_undefineds(f)) { + goto out; + } + obj_allocate_commons(f); + check_tainted_module(f, m_name); + + /* done with the module name, on to the optional var=value arguments */ + ++optind; + if (optind < argc) { + if (!new_process_module_arguments(f, argc - optind, argv + optind)) { + goto out; + } + } + + arch_create_got(f); + hide_special_symbols(f); + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS + add_ksymoops_symbols(f, m_filename, m_name); +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + + new_create_module_ksymtab(f); + + /* Find current size of the module */ + m_size = obj_load_size(f); + + + m_addr = create_module(m_name, m_size); + if (m_addr == -1) switch (errno) { + case EEXIST: + bb_error_msg("a module named %s already exists", m_name); + goto out; + case ENOMEM: + bb_error_msg("can't allocate kernel memory for module; needed %lu bytes", + m_size); + goto out; + default: + bb_perror_msg("create_module: %s", m_name); + goto out; + } + +#if !LOADBITS + /* + * the PROGBITS section was not loaded by the obj_load + * now we can load them directly into the kernel memory + */ + if (!obj_load_progbits(fp, f, (char*)m_addr)) { + delete_module(m_name); + goto out; + } +#endif + + if (!obj_relocate(f, m_addr)) { + delete_module(m_name); + goto out; + } + + if (!new_init_module(m_name, f, m_size)) { + delete_module(m_name); + goto out; + } + + if(flag_print_load_map) + print_load_map(f); + + exit_status = EXIT_SUCCESS; + +out: +#if ENABLE_FEATURE_CLEAN_UP + if(fp) + fclose(fp); + free(tmp1); + if(!tmp1) + free(m_name); + free(m_filename); +#endif + return exit_status; +} + + +#endif + + +#if ENABLE_FEATURE_2_6_MODULES + +#include <sys/mman.h> +#include <asm/unistd.h> +#include <sys/syscall.h> + +/* We use error numbers in a loose translation... */ +static const char *moderror(int err) +{ + switch (err) { + case ENOEXEC: + return "Invalid module format"; + case ENOENT: + return "Unknown symbol in module"; + case ESRCH: + return "Module has wrong symbol version"; + case EINVAL: + return "Invalid parameters"; + default: + return strerror(err); + } +} + +int insmod_ng_main(int argc, char **argv) +{ + long ret; + size_t len; + void *map; + char *filename, *options; + + filename = *++argv; + if (!filename) + bb_show_usage(); + + /* Rest is options */ + options = xstrdup(""); + while (*++argv) { + int optlen = strlen(options); + options = xrealloc(options, optlen + 2 + strlen(*argv) + 2); + /* Spaces handled by "" pairs, but no way of escaping quotes */ + sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv); + } + +#if 0 + /* Any special reason why mmap? It isn't performace critical... */ + int fd; + struct stat st; + unsigned long len; + fd = xopen(filename, O_RDONLY); + fstat(fd, &st); + len = st.st_size; + map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0); + if (map == MAP_FAILED) { + bb_perror_msg_and_die("cannot mmap '%s'", filename); + } + + /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */ + if (map == NULL) { + map = xmalloc(len); + xread(fd, map, len); + } +#else + len = MAXINT(ssize_t); + map = xmalloc_open_read_close(filename, &len); +#endif + + ret = syscall(__NR_init_module, map, len, options); + if (ret != 0) { + bb_perror_msg_and_die("cannot insert '%s': %s (%li)", + filename, moderror(errno), ret); + } + + return 0; +} + +#endif diff --git a/modutils/lsmod.c b/modutils/lsmod.c new file mode 100644 index 000000000..ffde3d829 --- /dev/null +++ b/modutils/lsmod.c @@ -0,0 +1,188 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini lsmod implementation for busybox + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and + * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels + * (which lack the query_module() interface). + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "busybox.h" + + +#ifndef CONFIG_FEATURE_CHECK_TAINTED_MODULE +static void check_tainted(void) { puts(""); } +#else +#define TAINT_FILENAME "/proc/sys/kernel/tainted" +#define TAINT_PROPRIETORY_MODULE (1<<0) +#define TAINT_FORCED_MODULE (1<<1) +#define TAINT_UNSAFE_SMP (1<<2) + +static void check_tainted(void) +{ + int tainted; + FILE *f; + + tainted = 0; + if ((f = fopen(TAINT_FILENAME, "r"))) { + fscanf(f, "%d", &tainted); + fclose(f); + } + if (f && tainted) { + printf(" Tainted: %c%c%c\n", + tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G', + tainted & TAINT_FORCED_MODULE ? 'F' : ' ', + tainted & TAINT_UNSAFE_SMP ? 'S' : ' '); + } + else { + printf(" Not tainted\n"); + } +} +#endif + +#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE + +struct module_info +{ + unsigned long addr; + unsigned long size; + unsigned long flags; + long usecount; +}; + + +int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret); + +enum { +/* Values for query_module's which. */ + QM_MODULES = 1, + QM_DEPS = 2, + QM_REFS = 3, + QM_SYMBOLS = 4, + QM_INFO = 5, + +/* Bits of module.flags. */ + NEW_MOD_RUNNING = 1, + NEW_MOD_DELETED = 2, + NEW_MOD_AUTOCLEAN = 4, + NEW_MOD_VISITED = 8, + NEW_MOD_USED_ONCE = 16, + NEW_MOD_INITIALIZING = 64 +}; + +int lsmod_main(int argc, char **argv) +{ + struct module_info info; + char *module_names, *mn, *deps, *dn; + size_t bufsize, depsize, nmod, count, i, j; + + module_names = deps = NULL; + bufsize = depsize = 0; + while(query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) { + if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES"); + module_names = xmalloc(bufsize = nmod); + } + + deps = xmalloc(depsize = 256); + printf("Module\t\t\tSize Used by"); + check_tainted(); + + for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) { + if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) { + if (errno == ENOENT) { + /* The module was removed out from underneath us. */ + continue; + } + /* else choke */ + bb_perror_msg_and_die("module %s: QM_INFO", mn); + } + while (query_module(mn, QM_REFS, deps, depsize, &count)) { + if (errno == ENOENT) { + /* The module was removed out from underneath us. */ + continue; + } else if (errno != ENOSPC) + bb_perror_msg_and_die("module %s: QM_REFS", mn); + deps = xrealloc(deps, count); + } + printf("%-20s%8lu%4ld", mn, info.size, info.usecount); + if (info.flags & NEW_MOD_DELETED) + printf(" (deleted)"); + else if (info.flags & NEW_MOD_INITIALIZING) + printf(" (initializing)"); + else if (!(info.flags & NEW_MOD_RUNNING)) + printf(" (uninitialized)"); + else { + if (info.flags & NEW_MOD_AUTOCLEAN) + printf(" (autoclean) "); + if (!(info.flags & NEW_MOD_USED_ONCE)) + printf(" (unused)"); + } + if (count) printf(" ["); + for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) { + printf("%s%s", dn, (j==count-1)? "":" "); + } + if (count) printf("]"); + + puts(""); + } + +#ifdef CONFIG_FEATURE_CLEAN_UP + free(module_names); +#endif + + return 0; +} + +#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ + +int lsmod_main(int argc, char **argv) +{ + FILE *file = xfopen("/proc/modules", "r"); + + printf("Module Size Used by"); + check_tainted(); +#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT) + { + char *line; + while ((line = xmalloc_fgets(file)) != NULL) { + char *tok; + + tok = strtok(line, " \t"); + printf("%-19s", tok); + tok = strtok(NULL, " \t\n"); + printf(" %8s", tok); + tok = strtok(NULL, " \t\n"); + /* Null if no module unloading support. */ + if (tok) { + printf(" %s", tok); + tok = strtok(NULL, "\n"); + if (!tok) + tok = ""; + /* New-style has commas, or -. If so, + truncate (other fields might follow). */ + else if (strchr(tok, ',')) { + tok = strtok(tok, "\t "); + /* Strip trailing comma. */ + if (tok[strlen(tok)-1] == ',') + tok[strlen(tok)-1] = '\0'; + } else if (tok[0] == '-' + && (tok[1] == '\0' || isspace(tok[1]))) + tok = ""; + printf(" %s", tok); + } + puts(""); + free(line); + } + fclose(file); + } +#else + xprint_and_close_file(file); +#endif /* CONFIG_FEATURE_2_6_MODULES */ + return EXIT_SUCCESS; +} + +#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ diff --git a/modutils/modprobe.c b/modutils/modprobe.c new file mode 100644 index 000000000..dcab493f1 --- /dev/null +++ b/modutils/modprobe.c @@ -0,0 +1,905 @@ +/* vi: set sw=4 ts=4: */ +/* + * Modprobe written from scratch for BusyBox + * + * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de + * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au + * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com + * + * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. +*/ + +#include "busybox.h" +#include <sys/utsname.h> +#include <fnmatch.h> + +struct mod_opt_t { /* one-way list of options to pass to a module */ + char * m_opt_val; + struct mod_opt_t * m_next; +}; + +struct dep_t { /* one-way list of dependency rules */ + /* a dependency rule */ + char * m_name; /* the module name*/ + char * m_path; /* the module file path */ + struct mod_opt_t * m_options; /* the module options */ + + int m_isalias : 1; /* the module is an alias */ + int m_reserved : 15; /* stuffin' */ + + int m_depcnt : 16; /* the number of dependable module(s) */ + char ** m_deparr; /* the list of dependable module(s) */ + + struct dep_t * m_next; /* the next dependency rule */ +}; + +struct mod_list_t { /* two-way list of modules to process */ + /* a module description */ + char * m_name; + char * m_path; + struct mod_opt_t * m_options; + + struct mod_list_t * m_prev; + struct mod_list_t * m_next; +}; + + +static struct dep_t *depend; + +#define main_options "acdklnqrst:vVC:" +#define INSERT_ALL 1 /* a */ +#define DUMP_CONF_EXIT 2 /* c */ +#define D_OPT_IGNORED 4 /* d */ +#define AUTOCLEAN_FLG 8 /* k */ +#define LIST_ALL 16 /* l */ +#define SHOW_ONLY 32 /* n */ +#define QUIET 64 /* q */ +#define REMOVE_OPT 128 /* r */ +#define DO_SYSLOG 256 /* s */ +#define RESTRICT_DIR 512 /* t */ +#define VERBOSE 1024 /* v */ +#define VERSION_ONLY 2048 /* V */ +#define CONFIG_FILE 4096 /* C */ + +#define autoclean (main_opts & AUTOCLEAN_FLG) +#define show_only (main_opts & SHOW_ONLY) +#define quiet (main_opts & QUIET) +#define remove_opt (main_opts & REMOVE_OPT) +#define do_syslog (main_opts & DO_SYSLOG) +#define verbose (main_opts & VERBOSE) + +static int main_opts; + +static int parse_tag_value(char *buffer, char **ptag, char **pvalue) +{ + char *tag, *value; + + buffer = skip_whitespace(buffer); + tag = value = buffer; + while (!isspace(*value)) + if (!*value) return 0; + else value++; + *value++ = 0; + value = skip_whitespace(value); + if (!*value) return 0; + + *ptag = tag; + *pvalue = value; + + return 1; +} + +/* + * This function appends an option to a list + */ +static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt) +{ + struct mod_opt_t *ol = opt_list; + + if (ol) { + while (ol->m_next) { + ol = ol->m_next; + } + ol->m_next = xmalloc(sizeof(struct mod_opt_t)); + ol = ol->m_next; + } else { + ol = opt_list = xmalloc(sizeof(struct mod_opt_t)); + } + + ol->m_opt_val = xstrdup(opt); + ol->m_next = NULL; + + return opt_list; +} + +#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS +/* static char* parse_command_string(char* src, char **dst); + * src: pointer to string containing argument + * dst: pointer to where to store the parsed argument + * return value: the pointer to the first char after the parsed argument, + * NULL if there was no argument parsed (only trailing spaces). + * Note that memory is allocated with xstrdup when a new argument was + * parsed. Don't forget to free it! + */ +#define ARG_EMPTY 0x00 +#define ARG_IN_DQUOTES 0x01 +#define ARG_IN_SQUOTES 0x02 +static char *parse_command_string(char *src, char **dst) +{ + int opt_status = ARG_EMPTY; + char* tmp_str; + + /* Dumb you, I have nothing to do... */ + if (src == NULL) return src; + + /* Skip leading spaces */ + while (*src == ' ') { + src++; + } + /* Is the end of string reached? */ + if (*src == '\0') { + return NULL; + } + /* Reached the start of an argument + * By the way, we duplicate a little too much + * here but what is too much is freed later. */ + *dst = tmp_str = xstrdup(src); + /* Get to the end of that argument */ + while (*tmp_str != '\0' + && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES))) + ) { + switch (*tmp_str) { + case '\'': + if (opt_status & ARG_IN_DQUOTES) { + /* Already in double quotes, keep current char as is */ + } else { + /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ + memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); + /* mark me: we enter or leave single quotes */ + opt_status ^= ARG_IN_SQUOTES; + /* Back one char, as we need to re-scan the new char there. */ + tmp_str--; + } + break; + case '"': + if (opt_status & ARG_IN_SQUOTES) { + /* Already in single quotes, keep current char as is */ + } else { + /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ + memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); + /* mark me: we enter or leave double quotes */ + opt_status ^= ARG_IN_DQUOTES; + /* Back one char, as we need to re-scan the new char there. */ + tmp_str--; + } + break; + case '\\': + if (opt_status & ARG_IN_SQUOTES) { + /* Between single quotes: keep as is. */ + } else { + switch (*(tmp_str+1)) { + case 'a': + case 'b': + case 't': + case 'n': + case 'v': + case 'f': + case 'r': + case '0': + /* We escaped a special character. For now, keep + * both the back-slash and the following char. */ + tmp_str++; src++; + break; + default: + /* We escaped a space or a single or double quote, + * or a back-slash, or a non-escapable char. Remove + * the '\' and keep the new current char as is. */ + memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); + break; + } + } + break; + /* Any other char that is special shall appear here. + * Example: $ starts a variable + case '$': + do_variable_expansion(); + break; + * */ + default: + /* any other char is kept as is. */ + break; + } + tmp_str++; /* Go to next char */ + src++; /* Go to next char to find the end of the argument. */ + } + /* End of string, but still no ending quote */ + if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) { + bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src); + } + *tmp_str++ = '\0'; + *dst = xrealloc(*dst, (tmp_str - *dst)); + return src; +} +#else +#define parse_command_string(src, dst) (0) +#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */ + +/* + * This function reads aliases and default module options from a configuration file + * (/etc/modprobe.conf syntax). It supports includes (only files, no directories). + */ +static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd) +{ + int continuation_line = 0; + + // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) ! + + while (reads(fd, buffer, buflen)) { + int l; + char *p; + + p = strchr(buffer, '#'); + if (p) + *p = 0; + + l = strlen(buffer); + + while (l && isspace(buffer[l-1])) { + buffer[l-1] = 0; + l--; + } + + if (l == 0) { + continuation_line = 0; + continue; + } + + if (!continuation_line) { + if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) { + char *alias, *mod; + + if (parse_tag_value(buffer + 6, &alias, &mod)) { + /* handle alias as a module dependent on the aliased module */ + if (!*current) { + (*first) = (*current) = xzalloc(sizeof(struct dep_t)); + } + else { + (*current)->m_next = xzalloc(sizeof(struct dep_t)); + (*current) = (*current)->m_next; + } + (*current)->m_name = xstrdup(alias); + (*current)->m_isalias = 1; + + if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) { + (*current)->m_depcnt = 0; + (*current)->m_deparr = 0; + } + else { + (*current)->m_depcnt = 1; + (*current)->m_deparr = xmalloc(1 * sizeof(char *)); + (*current)->m_deparr[0] = xstrdup(mod); + } + (*current)->m_next = 0; + } + } + else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) { + char *mod, *opt; + + /* split the line in the module/alias name, and options */ + if (parse_tag_value(buffer + 8, &mod, &opt)) { + struct dep_t *dt; + + /* find the corresponding module */ + for (dt = *first; dt; dt = dt->m_next) { + if (strcmp(dt->m_name, mod) == 0) + break; + } + if (dt) { + if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) { + char* new_opt = NULL; + while ((opt = parse_command_string(opt, &new_opt))) { + dt->m_options = append_option(dt->m_options, new_opt); + } + } else { + dt->m_options = append_option(dt->m_options, opt); + } + } + } + } + else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) { + int fdi; char *filename; + + filename = skip_whitespace(buffer + 8); + + if ((fdi = open(filename, O_RDONLY)) >= 0) { + include_conf(first, current, buffer, buflen, fdi); + close(fdi); + } + } + } + } +} + +/* + * This function builds a list of dependency rules from /lib/modules/`uname -r`\modules.dep. + * It then fills every modules and aliases with their default options, found by parsing + * modprobe.conf (or modules.conf, or conf.modules). + */ +static struct dep_t *build_dep(void) +{ + int fd; + struct utsname un; + struct dep_t *first = 0; + struct dep_t *current = 0; + char buffer[2048]; + char *filename; + int continuation_line = 0; + int k_version; + + if (uname(&un)) + bb_error_msg_and_die("can't determine kernel version"); + + k_version = 0; + if (un.release[0] == '2') { + k_version = un.release[2] - '0'; + } + + filename = xasprintf("/lib/modules/%s/modules.dep", un.release); + fd = open(filename, O_RDONLY); + if (ENABLE_FEATURE_CLEAN_UP) + free(filename); + if (fd < 0) { + /* Ok, that didn't work. Fall back to looking in /lib/modules */ + fd = open("/lib/modules/modules.dep", O_RDONLY); + if (fd < 0) { + return 0; + } + } + + while (reads(fd, buffer, sizeof(buffer))) { + int l = strlen(buffer); + char *p = 0; + + while (l > 0 && isspace(buffer[l-1])) { + buffer[l-1] = 0; + l--; + } + + if (l == 0) { + continuation_line = 0; + continue; + } + + /* Is this a new module dep description? */ + if (!continuation_line) { + /* find the dep beginning */ + char *col = strchr(buffer, ':'); + char *dot = col; + + if (col) { + /* This line is a dep description */ + char *mods; + char *modpath; + char *mod; + + /* Find the beginning of the module file name */ + *col = 0; + mods = strrchr(buffer, '/'); + + if (!mods) + mods = buffer; /* no path for this module */ + else + mods++; /* there was a path for this module... */ + + /* find the path of the module */ + modpath = strchr(buffer, '/'); /* ... and this is the path */ + if (!modpath) + modpath = buffer; /* module with no path */ + /* find the end of the module name in the file name */ + if (ENABLE_FEATURE_2_6_MODULES && + (k_version > 4) && (*(col-3) == '.') && + (*(col-2) == 'k') && (*(col-1) == 'o')) + dot = col - 3; + else + if ((*(col-2) == '.') && (*(col-1) == 'o')) + dot = col - 2; + + mod = xstrndup(mods, dot - mods); + + /* enqueue new module */ + if (!current) { + first = current = xmalloc(sizeof(struct dep_t)); + } + else { + current->m_next = xmalloc(sizeof(struct dep_t)); + current = current->m_next; + } + current->m_name = mod; + current->m_path = xstrdup(modpath); + current->m_options = NULL; + current->m_isalias = 0; + current->m_depcnt = 0; + current->m_deparr = 0; + current->m_next = 0; + + p = col + 1; + } + else + /* this line is not a dep description */ + p = 0; + } + else + /* It's a dep description continuation */ + p = buffer; + + while (p && *p && isblank(*p)) + p++; + + /* p points to the first dependable module; if NULL, no dependable module */ + if (p && *p) { + char *end = &buffer[l-1]; + char *deps; + char *dep; + char *next; + int ext = 0; + + while (isblank(*end) || (*end == '\\')) + end--; + + do { + /* search the end of the dependency */ + next = strchr(p, ' '); + if (next) { + *next = 0; + next--; + } + else + next = end; + + /* find the beginning of the module file name */ + deps = strrchr(p, '/'); + + if (!deps || (deps < p)) { + deps = p; + + while (isblank(*deps)) + deps++; + } else + deps++; + + /* find the end of the module name in the file name */ + if (ENABLE_FEATURE_2_6_MODULES + && (k_version > 4) && (*(next-2) == '.') + && (*(next-1) == 'k') && (*next == 'o')) + ext = 3; + else + if ((*(next-1) == '.') && (*next == 'o')) + ext = 2; + + /* Cope with blank lines */ + if ((next-deps-ext+1) <= 0) + continue; + dep = xstrndup(deps, next - deps - ext + 1); + + /* Add the new dependable module name */ + current->m_depcnt++; + current->m_deparr = xrealloc(current->m_deparr, + sizeof(char *) * current->m_depcnt); + current->m_deparr[current->m_depcnt - 1] = dep; + + p = next + 2; + } while (next < end); + } + + /* is there other dependable module(s) ? */ + if (buffer[l-1] == '\\') + continuation_line = 1; + else + continuation_line = 0; + } + close(fd); + + /* + * First parse system-specific options and aliases + * as they take precedence over the kernel ones. + */ + if (!ENABLE_FEATURE_2_6_MODULES + || (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0) + if ((fd = open("/etc/modules.conf", O_RDONLY)) < 0) + fd = open("/etc/conf.modules", O_RDONLY); + + if (fd >= 0) { + include_conf(&first, ¤t, buffer, sizeof(buffer), fd); + close(fd); + } + + /* Only 2.6 has a modules.alias file */ + if (ENABLE_FEATURE_2_6_MODULES) { + /* Parse kernel-declared aliases */ + filename = xasprintf("/lib/modules/%s/modules.alias", un.release); + fd = open(filename, O_RDONLY); + if (fd < 0) { + /* Ok, that didn't work. Fall back to looking in /lib/modules */ + fd = open("/lib/modules/modules.alias", O_RDONLY); + } + if (ENABLE_FEATURE_CLEAN_UP) + free(filename); + + if (fd >= 0) { + include_conf(&first, ¤t, buffer, sizeof(buffer), fd); + close(fd); + } + } + + return first; +} + +/* return 1 = loaded, 0 = not loaded, -1 = can't tell */ +static int already_loaded(const char *name) +{ + int fd, ret = 0; + char buffer[4096]; + + fd = open("/proc/modules", O_RDONLY); + if (fd < 0) + return -1; + + while (reads(fd, buffer, sizeof(buffer))) { + char *p; + + p = strchr (buffer, ' '); + if (p) { + const char *n; + + // Truncate buffer at first space and check for matches, with + // the idiosyncrasy that _ and - are interchangeable because the + // 2.6 kernel does weird things. + + *p = 0; + for (p = buffer, n = name; ; p++, n++) { + if (*p != *n) { + if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-')) + continue; + break; + } + // If we made it to the end, that's a match. + if (!*p) { + ret = 1; + goto done; + } + } + } + } +done: + close (fd); + return ret; +} + +static int mod_process(struct mod_list_t *list, int do_insert) +{ + int rc = 0; + char **argv = NULL; + struct mod_opt_t *opts; + int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */ + int argc; + + while (list) { + argc = 0; + if (ENABLE_FEATURE_CLEAN_UP) + argc_malloc = 0; + /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory + * each time we allocate memory for argv. + * But it is (quite) small amounts of memory that leak each + * time a module is loaded, and it is reclaimed when modprobe + * exits anyway (even when standalone shell?). + * This could become a problem when loading a module with LOTS of + * dependencies, with LOTS of options for each dependencies, with + * very little memory on the target... But in that case, the module + * would not load because there is no more memory, so there's no + * problem. */ + /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */ + argv = xmalloc(6 * sizeof(char*)); + if (do_insert) { + if (already_loaded(list->m_name) != 1) { + argv[argc++] = "insmod"; + if (ENABLE_FEATURE_2_4_MODULES) { + if (do_syslog) + argv[argc++] = "-s"; + if (autoclean) + argv[argc++] = "-k"; + if (quiet) + argv[argc++] = "-q"; + else if (verbose) /* verbose and quiet are mutually exclusive */ + argv[argc++] = "-v"; + } + argv[argc++] = list->m_path; + if (ENABLE_FEATURE_CLEAN_UP) + argc_malloc = argc; + opts = list->m_options; + while (opts) { + /* Add one more option */ + argc++; + argv = xrealloc(argv,(argc + 1)* sizeof(char*)); + argv[argc-1] = opts->m_opt_val; + opts = opts->m_next; + } + } + } else { + /* modutils uses short name for removal */ + if (already_loaded(list->m_name) != 0) { + argv[argc++] = "rmmod"; + if (do_syslog) + argv[argc++] = "-s"; + argv[argc++] = list->m_name; + if (ENABLE_FEATURE_CLEAN_UP) + argc_malloc = argc; + } + } + argv[argc] = NULL; + + if (argc) { + if (verbose) { + printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name); + } + if (!show_only) { + int rc2 = wait4pid(spawn(argv)); + + if (do_insert) { + rc = rc2; /* only last module matters */ + } + else if (!rc2) { + rc = 0; /* success if remove any mod */ + } + } + if (ENABLE_FEATURE_CLEAN_UP) { + /* the last value in the array has index == argc, but + * it is the terminating NULL, so we must not free it. */ + while (argc_malloc < argc) { + free(argv[argc_malloc++]); + } + } + } + if (ENABLE_FEATURE_CLEAN_UP) { + free(argv); + argv = NULL; + } + list = do_insert ? list->m_prev : list->m_next; + } + return (show_only) ? 0 : rc; +} + +/* + * Check the matching between a pattern and a module name. + * We need this as *_* is equivalent to *-*, even in pattern matching. + */ +static int check_pattern(const char* pat_src, const char* mod_src) { + int ret; + + if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) { + char* pat; + char* mod; + char* p; + + pat = xstrdup (pat_src); + mod = xstrdup (mod_src); + + for (p = pat; (p = strchr(p, '-')); *p++ = '_'); + for (p = mod; (p = strchr(p, '-')); *p++ = '_'); + + ret = fnmatch(pat, mod, 0); + + if (ENABLE_FEATURE_CLEAN_UP) { + free (pat); + free (mod); + } + + return ret; + } else { + return fnmatch(pat_src, mod_src, 0); + } +} + +/* + * Builds the dependency list (aka stack) of a module. + * head: the highest module in the stack (last to insmod, first to rmmod) + * tail: the lowest module in the stack (first to insmod, last to rmmod) + */ +static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail) +{ + struct mod_list_t *find; + struct dep_t *dt; + struct mod_opt_t *opt = 0; + char *path = 0; + + /* Search for the given module name amongst all dependency rules. + * The module name in a dependency rule can be a shell pattern, + * so try to match the given module name against such a pattern. + * Of course if the name in the dependency rule is a plain string, + * then we consider it a pattern, and matching will still work. */ + for (dt = depend; dt; dt = dt->m_next) { + if (check_pattern(dt->m_name, mod) == 0) { + break; + } + } + + if (!dt) { + bb_error_msg("module %s not found", mod); + return; + } + + // resolve alias names + while (dt->m_isalias) { + if (dt->m_depcnt == 1) { + struct dep_t *adt; + + for (adt = depend; adt; adt = adt->m_next) { + if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0) + break; + } + if (adt) { + /* This is the module we are aliased to */ + struct mod_opt_t *opts = dt->m_options; + /* Option of the alias are appended to the options of the module */ + while (opts) { + adt->m_options = append_option(adt->m_options, opts->m_opt_val); + opts = opts->m_next; + } + dt = adt; + } + else { + bb_error_msg("module %s not found", mod); + return; + } + } + else { + bb_error_msg("bad alias %s", dt->m_name); + return; + } + } + + mod = dt->m_name; + path = dt->m_path; + opt = dt->m_options; + + // search for duplicates + for (find = *head; find; find = find->m_next) { + if (!strcmp(mod, find->m_name)) { + // found ->dequeue it + + if (find->m_prev) + find->m_prev->m_next = find->m_next; + else + *head = find->m_next; + + if (find->m_next) + find->m_next->m_prev = find->m_prev; + else + *tail = find->m_prev; + + break; // there can be only one duplicate + } + } + + if (!find) { // did not find a duplicate + find = xmalloc(sizeof(struct mod_list_t)); + find->m_name = mod; + find->m_path = path; + find->m_options = opt; + } + + // enqueue at tail + if (*tail) + (*tail)->m_next = find; + find->m_prev = *tail; + find->m_next = 0; + + if (!*head) + *head = find; + *tail = find; + + if (dt) { + int i; + + /* Add all dependable module for that new module */ + for (i = 0; i < dt->m_depcnt; i++) + check_dep(dt->m_deparr[i], head, tail); + } +} + +static int mod_insert(char *mod, int argc, char **argv) +{ + struct mod_list_t *tail = 0; + struct mod_list_t *head = 0; + int rc; + + // get dep list for module mod + check_dep(mod, &head, &tail); + + if (head && tail) { + if (argc) { + int i; + // append module args + for (i = 0; i < argc; i++) + head->m_options = append_option(head->m_options, argv[i]); + } + + // process tail ---> head + if ((rc = mod_process(tail, 1)) != 0) { + /* + * In case of using udev, multiple instances of modprobe can be + * spawned to load the same module (think of two same usb devices, + * for example; or cold-plugging at boot time). Thus we shouldn't + * fail if the module was loaded, and not by us. + */ + if (already_loaded(mod)) + rc = 0; + } + } + else + rc = 1; + + return rc; +} + +static int mod_remove(char *mod) +{ + int rc; + static struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL }; + + struct mod_list_t *head = 0; + struct mod_list_t *tail = 0; + + if (mod) + check_dep(mod, &head, &tail); + else // autoclean + head = tail = &rm_a_dummy; + + if (head && tail) + rc = mod_process(head, 0); // process head ---> tail + else + rc = 1; + return rc; + +} + +int modprobe_main(int argc, char** argv) +{ + int rc = EXIT_SUCCESS; + char *unused; + + opt_complementary = "?V-:q-v:v-q"; + main_opts = getopt32(argc, argv, "acdklnqrst:vVC:", + &unused, &unused); + if (main_opts & (DUMP_CONF_EXIT | LIST_ALL)) + return EXIT_SUCCESS; + if (main_opts & (RESTRICT_DIR | CONFIG_FILE)) + bb_error_msg_and_die("-t and -C not supported"); + + depend = build_dep(); + + if (!depend) + bb_error_msg_and_die("cannot parse modules.dep"); + + if (remove_opt) { + do { + if (mod_remove(optind < argc ? + argv[optind] : NULL)) { + bb_error_msg("failed to remove module %s", + argv[optind]); + rc = EXIT_FAILURE; + } + } while (++optind < argc); + } else { + if (optind >= argc) + bb_error_msg_and_die("no module or pattern provided"); + + if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1)) + bb_error_msg_and_die("failed to load module %s", argv[optind]); + } + + /* Here would be a good place to free up memory allocated during the dependencies build. */ + + return rc; +} diff --git a/modutils/rmmod.c b/modutils/rmmod.c new file mode 100644 index 000000000..22e864d57 --- /dev/null +++ b/modutils/rmmod.c @@ -0,0 +1,96 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini rmmod implementation for busybox + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "busybox.h" +#include <sys/syscall.h> + +#ifdef CONFIG_FEATURE_2_6_MODULES +static inline void filename2modname(char *modname, const char *afterslash) +{ + unsigned int i; + int kr_chk = 1; + + if (ENABLE_FEATURE_2_4_MODULES + && get_linux_version_code() <= KERNEL_VERSION(2,6,0)) + kr_chk = 0; + + /* Convert to underscores, stop at first . */ + for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) { + if (kr_chk && (afterslash[i] == '-')) + modname[i] = '_'; + else + modname[i] = afterslash[i]; + } + modname[i] = '\0'; +} +#else +void filename2modname(char *modname, const char *afterslash); +#endif + +// There really should be a header file for this... + +int query_module(const char *name, int which, void *buf, + size_t bufsize, size_t *ret); + +int rmmod_main(int argc, char **argv) +{ + int n, ret = EXIT_SUCCESS; + unsigned int flags = O_NONBLOCK|O_EXCL; + + /* Parse command line. */ + n = getopt32(argc, argv, "wfa"); + if((n & 1)) // --wait + flags &= ~O_NONBLOCK; + if((n & 2)) // --force + flags |= O_TRUNC; + if((n & 4)) { + /* Unload _all_ unused modules via NULL delete_module() call */ + /* until the number of modules does not change */ + size_t nmod = 0; /* number of modules */ + size_t pnmod = -1; /* previous number of modules */ + + while (nmod != pnmod) { + if (syscall(__NR_delete_module, NULL, flags) != 0) { + if (errno == EFAULT) + return ret; + bb_perror_msg_and_die("rmmod"); + } + pnmod = nmod; + // the 1 here is QM_MODULES. + if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL, + 1, bb_common_bufsiz1, sizeof(bb_common_bufsiz1), + &nmod)) + { + bb_perror_msg_and_die("QM_MODULES"); + } + } + return EXIT_SUCCESS; + } + + if (optind == argc) + bb_show_usage(); + + for (n = optind; n < argc; n++) { + if (ENABLE_FEATURE_2_6_MODULES) { + const char *afterslash; + + afterslash = strrchr(argv[n], '/'); + if (!afterslash) afterslash = argv[n]; + else afterslash++; + filename2modname(bb_common_bufsiz1, afterslash); + } + + if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? bb_common_bufsiz1 : argv[n], flags)) { + bb_perror_msg("%s", argv[n]); + ret = EXIT_FAILURE; + } + } + + return ret; +} |
