/* vi: set sw=4 ts=4: */
/*
* Mini insmod implementation for busybox
+ * This version of insmod now supports x86, ARM, SH3/4, powerpc, and MIPS.
*
* Copyright (C) 1999,2000,2001 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>
#include <string.h>
#include <getopt.h>
#include <sys/utsname.h>
-#include <sys/syscall.h>
-#include <linux/unistd.h>
#include "busybox.h"
+#ifdef BB_FEATURE_NEW_MODULE_INTERFACE
+# define new_sys_init_module init_module
+#else
+# define old_sys_init_module init_module
+#endif
+
#if defined(__powerpc__)
#define BB_USE_PLT_ENTRIES
#define BB_PLT_ENTRY_SIZE 16
#ifndef MODUTILS_MODULE_H
static const int MODUTILS_MODULE_H = 1;
-#ident "$Id: insmod.c,v 1.50 2001/02/24 20:01:53 andersen Exp $"
+#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* This file contains the structures used by the 2.0 and 2.1 kernels.
We do not use the kernel headers directly because we do not wish
#ifndef MODUTILS_OBJ_H
static const int MODUTILS_OBJ_H = 1;
-#ident "$Id: insmod.c,v 1.50 2001/02/24 20:01:53 andersen Exp $"
+#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* The relocatable object is manipulated using elfin types. */
#elif defined(__mips__)
+/* 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 MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
#define SHT_RELM SHT_REL
#define Elf32_RelM Elf32_Rel
int n_ext_modules_used;
-
-/* Some firendly syscalls to cheer everyone's day... */
-#define __NR_new_sys_init_module __NR_init_module
-_syscall2(int, new_sys_init_module, const char *, name,
- const struct new_module *, info)
-#define __NR_old_sys_init_module __NR_init_module
-_syscall5(int, old_sys_init_module, const char *, name, char *, code,
- unsigned, codesize, struct old_mod_routines *, routines,
- struct old_symbol_table *, symtab)
-#ifndef BB_RMMOD
-_syscall1(int, delete_module, const char *, name)
-#else
extern int delete_module(const char *);
-#endif
+
/* This is kind of troublesome. See, we don't actually support
the m68k or the arm the same way we support i386 and (now)
-- Bryan Rittmeyer <bryan@ixiacom.com> */
-#ifdef BB_FEATURE_OLD_MODULE_INTERFACE
-_syscall1(int, get_kernel_syms, struct old_kernel_sym *, ks)
-#endif
-
-#if defined(__i386__) || defined(__m68k__) || defined(__arm__) \
- || defined(__powerpc__)
-/* Jump through hoops to fixup error return codes */
-#define __NR__create_module __NR_create_module
-static inline _syscall2(long, _create_module, const char *, name, size_t,
- size)
-unsigned long create_module(const char *name, size_t size)
-{
- long ret = _create_module(name, size);
-
- if (ret == -1 && errno > 125) {
- ret = -errno;
- errno = 0;
- }
- return ret;
-}
-#else
-_syscall2(unsigned long, create_module, const char *, name, size_t, size)
-#endif
-static char m_filename[BUFSIZ + 1] = "\0";
-static char m_fullName[BUFSIZ + 1] = "\0";
+static char m_filename[BUFSIZ + 1];
+static char m_fullName[BUFSIZ + 1];
/*======================================================================*/
tmp++;
if (check_wildcard_match(tmp, fullName) == TRUE) {
/* Stop searching if we find a match */
- memcpy(m_filename, fileName, strlen(fileName)+1);
+ safe_strncpy(m_filename, fileName, sizeof(m_filename));
return (FALSE);
}
}
ElfW(RelM) *rel, ElfW(Addr) v)
{
struct arch_file *ifile = (struct arch_file *) f;
+#if !(defined(__mips__))
struct arch_symbol *isym = (struct arch_symbol *) sym;
+#endif
ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
#if defined(BB_USE_GOT_ENTRIES)
if (got_offset) {
- struct obj_section* relsec = obj_find_section(f, ".got");
+ struct obj_section* myrelsec = obj_find_section(f, ".got");
- if (relsec) {
- obj_extend_section(relsec, got_offset);
+ if (myrelsec) {
+ obj_extend_section(myrelsec, got_offset);
} else {
- relsec = obj_create_alloced_section(f, ".got",
+ myrelsec = obj_create_alloced_section(f, ".got",
BB_GOT_ENTRY_SIZE,
got_offset);
- assert(relsec);
+ assert(myrelsec);
}
- ifile->got = relsec;
+ ifile->got = myrelsec;
}
#endif
void *obj_extend_section(struct obj_section *sec, unsigned long more)
{
unsigned long oldsize = sec->header.sh_size;
- sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
+ if (more) {
+ sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
+ }
return sec->contents + oldsize;
}
while (*q++ == ',');
} else {
char *contents = f->sections[sym->secidx]->contents;
- char *loc = contents + sym->value;
+ char *myloc = contents + sym->value;
char *r; /* To search for commas */
/* Break the string with comas */
while ((r = strchr(q, ',')) != (char *) NULL) {
*r++ = '\0';
- obj_string_patch(f, sym->secidx, loc - contents, q);
- loc += sizeof(char *);
+ obj_string_patch(f, sym->secidx, myloc - contents, q);
+ myloc += sizeof(char *);
q = r;
}
/* last part */
- obj_string_patch(f, sym->secidx, loc - contents, q);
+ obj_string_patch(f, sym->secidx, myloc - contents, q);
}
argc--, argv++;
int nks, nms, nmod, i;
nks = get_kernel_syms(NULL);
- if (nks < 0) {
- perror_msg("get_kernel_syms: %s", m_name);
+ if (nks <= 0) {
+ if (nks)
+ perror_msg("get_kernel_syms: %s", m_name);
+ else
+ error_msg("No kernel symbols");
return 0;
}
while (k->name[0] == '#' && k->name[1]) {
struct old_kernel_sym *k2;
- struct new_module_symbol *s;
/* Find out how many symbols this module has. */
for (k2 = k + 1; k2->name[0] != '#'; ++k2)
module_names = xmalloc(bufsize = 256);
retry_modules_load:
if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
- if (errno == ENOSPC) {
+ if (errno == ENOSPC && bufsize < ret) {
module_names = xrealloc(module_names, bufsize = ret);
goto retry_modules_load;
}
}
n_ext_modules = nmod = ret;
- ext_modules = modules = xmalloc(nmod * sizeof(*modules));
- memset(modules, 0, nmod * sizeof(*modules));
/* Collect the modules' symbols. */
- 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;
- }
- 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:
- perror_msg("query_module: QM_SYMBOLS: %s", mn);
+ 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;
+ }
+ perror_msg("query_module: QM_INFO: %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;
+
+ 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:
+ 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;
+ }
}
}
syms = xmalloc(bufsize = 16 * 1024);
retry_kern_sym_load:
if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
- if (errno == ENOSPC) {
+ if (errno == ENOSPC && bufsize < ret) {
syms = xrealloc(syms, bufsize = ret);
goto retry_kern_sym_load;
}
tgt_long m_addr;
sec = obj_find_section(f, ".this");
+ if (!sec || !sec->contents) {
+ perror_msg_and_die("corrupt module %s?",m_name);
+ }
module = (struct new_module *) sec->contents;
m_addr = sec->header.sh_addr;
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);
/* Allocate space for a table of local symbols. */
j = f->local_symtab_size = sec->header.sh_info;
- f->local_symtab = xmalloc(j *=
- sizeof(struct obj_symbol *));
- memset(f->local_symtab, 0, j);
+ f->local_symtab = xcalloc(j, sizeof(struct obj_symbol *));
/* Insert all symbols into the hash table. */
for (j = 1, ++sym; j < nsym; ++j, ++sym) {
const char *name;
if (sym->st_name)
name = strtab + sym->st_name;
- else
+ else
name = f->sections[sym->st_shndx]->name;
obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
sym->st_value, sym->st_size);
- }
- }
+ }
+ }
break;
case SHT_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(). */
}
}
if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o')
len -= 2;
- strncpy(m_fullName, tmp, len);
+ memcpy(m_fullName, tmp, len);
+ m_fullName[len]='\0';
if (*m_name == '\0') {
strcpy(m_name, m_fullName);
}
} else
error_msg_and_die("No module named '%s' found in '%s'", m_fullName, _PATH_MODULES);
} else
- memcpy(m_filename, argv[optind], strlen(argv[optind]));
+ safe_strncpy(m_filename, argv[optind], sizeof(m_filename));
if ((f = obj_load(fp)) == NULL)
projects / oweals / busybox.git / blobdiff