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author | Mystery Man <unknown@mandriva.org> | 2001-08-07 17:40:36 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2001-08-07 17:40:36 +0000 |
commit | 068d599562888a36a50e5bbdeb8b70f83fa7c287 (patch) | |
tree | 18f5eed8353b3af647412875d438b55ef8c07670 /mdk-stage1/insmod-modutils/obj/obj_load.c | |
parent | be838931607e1ab14c8c699e20dd807b55579f7b (diff) | |
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This commit was manufactured by cvs2svn to create branchtopic/v_webmin_0_87
'v_webmin_0_87'.
Diffstat (limited to 'mdk-stage1/insmod-modutils/obj/obj_load.c')
-rw-r--r-- | mdk-stage1/insmod-modutils/obj/obj_load.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/mdk-stage1/insmod-modutils/obj/obj_load.c b/mdk-stage1/insmod-modutils/obj/obj_load.c deleted file mode 100644 index 4db20a998..000000000 --- a/mdk-stage1/insmod-modutils/obj/obj_load.c +++ /dev/null @@ -1,354 +0,0 @@ -/* Elf file reader. - Copyright 1996, 1997 Linux International. - - Contributed by Richard Henderson <rth@tamu.edu> - obj_free() added by Björn Ekwall <bj0rn@blox.se> March 1999 - Support for kallsyms Keith Owens <kaos@ocs.com.au> April 2000 - - 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. */ - -#ident "$Id$" - -#include <alloca.h> -#include <string.h> -#include <stdlib.h> -#include <unistd.h> - -#include "obj.h" -#include "util.h" - -/*======================================================================*/ - -struct obj_file * -obj_load (int fp, Elf32_Half e_type, const char *filename) -{ - 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; - - gzf_lseek(fp, 0, SEEK_SET); - if (gzf_read(fp, &f->header, sizeof(f->header)) != sizeof(f->header)) - { - error("error reading ELF header %s: %m", filename); - 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) - { - error("%s is not an ELF file", filename); - return NULL; - } - if (f->header.e_ident[EI_CLASS] != ELFCLASSM - || f->header.e_ident[EI_DATA] != ELFDATAM - || f->header.e_ident[EI_VERSION] != EV_CURRENT - || !MATCH_MACHINE(f->header.e_machine)) - { - error("ELF file %s not for this architecture", filename); - return NULL; - } - if (f->header.e_type != e_type && e_type != ET_NONE) - { - switch (e_type) { - case ET_REL: - error("ELF file %s not a relocatable object", filename); - break; - case ET_EXEC: - error("ELF file %s not an executable object", filename); - break; - default: - error("ELF file %s has wrong type, expecting %d got %d", - filename, e_type, f->header.e_type); - break; - } - return NULL; - } - - /* Read the section headers. */ - - if (f->header.e_shentsize != sizeof(ElfW(Shdr))) - { - error("section header size mismatch %s: %lu != %lu", - filename, - (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); - gzf_lseek(fp, f->header.e_shoff, SEEK_SET); - if (gzf_read(fp, section_headers, sizeof(ElfW(Shdr))*shnum) != sizeof(ElfW(Shdr))*shnum) - { - error("error reading ELF section headers %s: %m", filename); - 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; - - switch (sec->header.sh_type) - { - case SHT_NULL: - case SHT_NOTE: - case SHT_NOBITS: - /* ignore */ - break; - - case SHT_PROGBITS: - case SHT_SYMTAB: - case SHT_STRTAB: - case SHT_RELM: - if (sec->header.sh_size > 0) - { - sec->contents = xmalloc(sec->header.sh_size); - gzf_lseek(fp, sec->header.sh_offset, SEEK_SET); - if (gzf_read(fp, sec->contents, sec->header.sh_size) != sec->header.sh_size) - { - error("error reading ELF section data %s: %m", filename); - return NULL; - } - } - else - sec->contents = NULL; - break; - -#if SHT_RELM == SHT_REL - case SHT_RELA: - if (sec->header.sh_size) { - error("RELA relocations not supported on this architecture %s", filename); - return NULL; - } - break; -#else - case SHT_REL: - if (sec->header.sh_size) { - error("REL relocations not supported on this architecture %s", filename); - return NULL; - } - break; -#endif - - default: - if (sec->header.sh_type >= SHT_LOPROC) - { - if (arch_load_proc_section(sec, fp) < 0) - return NULL; - break; - } - - error("can't handle sections of type %ld %s", - (long)sec->header.sh_type, filename); - 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 and .modstring should be contents only but gcc has no - * attribute for that. The kernel may have marked these sections as - * ALLOC, ignore the allocate bit. - */ - if (strcmp(sec->name, ".modinfo") == 0 || - strcmp(sec->name, ".modstring") == 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))) - { - error("symbol size mismatch %s: %lu != %lu", - filename, - (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 = xmalloc(j *= sizeof(struct obj_symbol *)); - memset(f->local_symtab, 0, j); - - /* 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 - 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; - } - } - - /* second pass to add relocation data to symbols */ - for (i = 0; i < shnum; ++i) - { - struct obj_section *sec = f->sections[i]; - switch (sec->header.sh_type) - { - case SHT_RELM: - { - unsigned long nrel, j; - ElfW(RelM) *rel; - struct obj_section *symtab; - char *strtab; - if (sec->header.sh_entsize != sizeof(ElfW(RelM))) - { - error("relocation entry size mismatch %s: %lu != %lu", - filename, - (unsigned long)sec->header.sh_entsize, - (unsigned long)sizeof(ElfW(RelM))); - return NULL; - } - - nrel = sec->header.sh_size / sizeof(ElfW(RelM)); - rel = (ElfW(RelM) *) sec->contents; - symtab = f->sections[sec->header.sh_link]; - strtab = f->sections[symtab->header.sh_link]->contents; - - /* Save the relocate type in each symbol entry. */ - for (j = 0; j < nrel; ++j, ++rel) - { - ElfW(Sym) *extsym; - struct obj_symbol *intsym; - unsigned long symndx; - symndx = ELFW(R_SYM)(rel->r_info); - if (symndx) - { - extsym = ((ElfW(Sym) *) symtab->contents) + symndx; - if (ELFW(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); - } - intsym->r_type = ELFW(R_TYPE)(rel->r_info); - } - } - } - break; - } - } - - f->filename = xstrdup(filename); - - return f; -} - -void obj_free(struct obj_file *f) -{ - struct obj_section *sec; - struct obj_symbol *sym; - struct obj_symbol *next; - int i; - int n; - - if (f->sections) { - n = f->header.e_shnum; - for (i = 0; i < n; ++i) { - if ((sec = f->sections[i]) != NULL) { - if (sec->contents) - free(sec->contents); - free(sec); - } - } - free(f->sections); - } - - for (i = 0; i < HASH_BUCKETS; ++i) { - for (sym = f->symtab[i]; sym; sym = next) { - next = sym->next; - free(sym); - } - } - - if (f->local_symtab) - free(f->local_symtab); - - if (f->filename) - free((char *)(f->filename)); - - if (f->persist) - free((char *)(f->persist)); - - free(f); -} |