diff options
author | Mystery Man <unknown@mandriva.org> | 2005-08-30 18:55:27 +0000 |
---|---|---|
committer | Mystery Man <unknown@mandriva.org> | 2005-08-30 18:55:27 +0000 |
commit | ea3a905b182f34bba2f071111d5263f1868c4a6f (patch) | |
tree | 45713836a82198448c93696b30f3c9ab7ba9aa4a /mdk-stage1/insmod-modutils/obj/obj_reloc.c | |
parent | f5427227e11f6025648f9537ffd3110c003f7e25 (diff) | |
download | drakx-ea3a905b182f34bba2f071111d5263f1868c4a6f.tar drakx-ea3a905b182f34bba2f071111d5263f1868c4a6f.tar.gz drakx-ea3a905b182f34bba2f071111d5263f1868c4a6f.tar.bz2 drakx-ea3a905b182f34bba2f071111d5263f1868c4a6f.tar.xz drakx-ea3a905b182f34bba2f071111d5263f1868c4a6f.zip |
This commit was manufactured by cvs2svn to create tagV10_3_0_50mdk
'V10_3_0_50mdk'.
Diffstat (limited to 'mdk-stage1/insmod-modutils/obj/obj_reloc.c')
-rw-r--r-- | mdk-stage1/insmod-modutils/obj/obj_reloc.c | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/mdk-stage1/insmod-modutils/obj/obj_reloc.c b/mdk-stage1/insmod-modutils/obj/obj_reloc.c deleted file mode 100644 index 3f2c8aab0..000000000 --- a/mdk-stage1/insmod-modutils/obj/obj_reloc.c +++ /dev/null @@ -1,413 +0,0 @@ -/* Elf 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. */ - -#include <string.h> -#include <assert.h> -#include <alloca.h> - -#include <obj.h> -#include <util.h> - -/*======================================================================*/ - -int -obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - const char *string) -{ - struct obj_string_patch_struct *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, 0); - 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; -} - -int -obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - struct obj_symbol *sym) -{ - struct obj_symbol_patch_struct *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; -} - -int -obj_check_undefineds(struct obj_file *f, int quiet) -{ - 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 (ELFW(ST_BIND)(sym->info) == STB_WEAK) - { - sym->secidx = SHN_ABS; - sym->value = 0; - } - else if (sym->r_type) /* assumes R_arch_NONE is 0 on all arch */ - { - if (!quiet) - error("unresolved symbol %s", sym->name); - ret = 0; - } - } - } - - return ret; -} - -void -obj_clear_undefineds(struct obj_file *f) -{ - unsigned long i; - struct obj_symbol *sym; - for (i = 0; i < HASH_BUCKETS; ++i) - { - for (sym = f->symtab[i]; sym ; sym = sym->next) - if (sym->secidx == SHN_UNDEF) - { - sym->secidx = SHN_ABS; - sym->value = 0; - } - } -} - -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) - s->contents = memset(xmalloc(s->header.sh_size), - 0, s->header.sh_size); - else - s->contents = NULL; - s->header.sh_type = SHT_PROGBITS; - } - } -} - -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; -} - -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. */ - - arch_finalize_section_address(f, 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; - unsigned long nsyms; - - 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]; - - if (!(targsec->header.sh_flags & SHF_ALLOC)) - continue; - - rel = (ElfW(RelM) *)relsec->contents; - relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); - symtab = (ElfW(Sym) *)symsec->contents; - nsyms = symsec->header.sh_size / symsec->header.sh_entsize; - strtab = (const char *)strsec->contents; - - for (; rel < relend; ++rel) - { - ElfW(Addr) value = 0; - struct obj_symbol *intsym = NULL; - unsigned long symndx; - const char *errmsg; - - /* Attempt to find a value to use for this relocation. */ - - symndx = ELFW(R_SYM)(rel->r_info); - if (symndx) - { - /* Note we've already checked for undefined symbols. */ - - if (symndx >= nsyms) - { - error("Bad symbol index: %08lx >= %08lx", - symndx, nsyms); - continue; - } - - obj_find_relsym(intsym, f, f, rel, symtab, strtab); - value = obj_symbol_final_value(f, intsym); - } - -#if SHT_RELM == SHT_RELA - 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"; - goto bad_reloc; - case obj_reloc_constant_gp: - errmsg = "Modules compiled with -mconstant-gp cannot be loaded"; - goto bad_reloc; - bad_reloc: - error("%s of type %ld for %s", errmsg, - (long)ELFW(R_TYPE)(rel->r_info), intsym->name); - ret = 0; - break; - } - } - } - - /* Finally, take care of the patches. */ - - if (f->string_patches) - { - struct obj_string_patch_struct *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_struct *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; -} - -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) - 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; -} |