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* r_bin

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- More refactoring
  - Remove dupped code from Elf_(get_import_addr)
This commit is contained in:
Nibble 2009-07-08 02:06:27 +02:00
parent c9501effc9
commit e55dbb5858
1 changed files with 50 additions and 84 deletions
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134
libr/bin/format/elf/elf.c
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@ -162,96 +162,62 @@ static u64 Elf_(r_bin_elf_get_section_offset)(struct Elf_(r_bin_elf_obj_t) *bin,
return -1;
}
/*XXX*/
static u64 Elf_(get_import_addr)(struct Elf_(r_bin_elf_obj_t) *bin, int sym)
{
u64 got_addr, got_offset;
Elf_(Rel) *rel;
Elf_(Addr) plt_sym_addr;
int i, j, k;
u64 got_addr, got_offset;
int i, j, k, tsize;
if ((got_addr = Elf_(r_bin_elf_get_section_offset)(bin, ".got")) == -1)
return -1;
for (i = 0; i < bin->ehdr.e_shnum; i++) {
if (!strcmp(&bin->strtab[bin->shdr[i].sh_name], ".rel.plt")) {
Elf_(Rel) *rel;
if ((rel = (Elf_(Rel) *)malloc(bin->shdr[i].sh_size)) == NULL) {
perror("malloc (rel)");
return -1;
}
if (lseek(bin->fd, bin->shdr[i].sh_offset, SEEK_SET) != bin->shdr[i].sh_offset) {
perror("lseek (rel)");
return -1;
}
if (read(bin->fd, rel, bin->shdr[i].sh_size) != bin->shdr[i].sh_size) {
perror("read (rel)");
return -1;
}
if (!strcmp(&bin->strtab[bin->shdr[i].sh_name], ".rel.plt"))
tsize = sizeof(Elf_(Rel));
else if (!strcmp(&bin->strtab[bin->shdr[i].sh_name], ".rela.plt"))
tsize = sizeof(Elf_(Rela));
else continue;
for (j = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Rel))) {
r_mem_copyendian((u8*)&(rel[j].r_offset), (u8*)&(rel[j].r_offset), sizeof(Elf_(Addr)), !bin->endian);
r_mem_copyendian((u8*)&(rel[j].r_info), (u8*)&(rel[j].r_info), sizeof(Elf_Vword), !bin->endian);
}
got_offset = (rel->r_offset - bin->baddr - got_addr) & ELF_GOTOFF_MASK;
for (j = k = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Rel)), k++) {
if (ELF_R_SYM(rel[k].r_info) == sym) {
if (lseek(bin->fd, rel[k].r_offset-bin->baddr-got_offset, SEEK_SET)
!= rel[k].r_offset-bin->baddr-got_offset) {
perror("lseek (got)");
return -1;
}
if (read(bin->fd, &plt_sym_addr, sizeof(Elf_(Addr))) != sizeof(Elf_(Addr))) {
perror("read (got)");
return -1;
}
return (u64)(plt_sym_addr - 6);
}
}
break;
} else if (!strcmp(&bin->strtab[bin->shdr[i].sh_name], ".rela.plt")) {
Elf_(Rela) *rel;
if ((rel = (Elf_(Rela) *)malloc(bin->shdr[i].sh_size)) == NULL) {
perror("malloc (rel)");
return -1;
}
if (lseek(bin->fd, bin->shdr[i].sh_offset, SEEK_SET) != bin->shdr[i].sh_offset) {
perror("lseek (rel)");
return -1;
}
if (read(bin->fd, rel, bin->shdr[i].sh_size) != bin->shdr[i].sh_size) {
perror("read (rel)");
return -1;
}
for (j = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Rela))) {
r_mem_copyendian((u8*)&(rel[j].r_offset), (u8*)&(rel[j].r_offset), sizeof(Elf_(Addr)), !bin->endian);
r_mem_copyendian((u8*)&(rel[j].r_info), (u8*)&(rel[j].r_info), sizeof(Elf_Vword), !bin->endian);
}
got_offset = (rel->r_offset - bin->baddr - got_addr) & ELF_GOTOFF_MASK;
for (j = k = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Rela)), k++) {
if (ELF_R_SYM(rel[k].r_info) == sym) {
if (lseek(bin->fd, rel[k].r_offset-bin->baddr-got_offset, SEEK_SET)
!= rel[k].r_offset-bin->baddr-got_offset) {
perror("lseek (got)");
return -1;
}
if (read(bin->fd, &plt_sym_addr, sizeof(Elf_(Addr))) != sizeof(Elf_(Addr))) {
perror("read (got)");
return -1;
}
return (u64)(plt_sym_addr - 6);
}
}
break;
if ((rel = (Elf_(Rel) *)malloc((int)(bin->shdr[i].sh_size / tsize) * sizeof(Elf_(Rel)))) == NULL) {
perror("malloc (rel)");
return -1;
}
for (j = k = 0; j < bin->shdr[i].sh_size; j += tsize, k++) {
if (lseek(bin->fd, bin->shdr[i].sh_offset + j, SEEK_SET) != bin->shdr[i].sh_offset + j) {
perror("lseek (rel)");
return -1;
}
if (read(bin->fd, &rel[k], sizeof(Elf_(Rel))) != sizeof(Elf_(Rel))) {
perror("read (rel)");
return -1;
}
}
}
for (j = k = 0; j < bin->shdr[i].sh_size; j += tsize, k++) {
r_mem_copyendian((u8*)&(rel[k].r_offset), (u8*)&(rel[k].r_offset), sizeof(Elf_(Addr)), !bin->endian);
r_mem_copyendian((u8*)&(rel[k].r_info), (u8*)&(rel[k].r_info), sizeof(Elf_Vword), !bin->endian);
}
got_offset = (rel[0].r_offset - bin->baddr - got_addr) & ELF_GOTOFF_MASK;
for (j = k = 0; j < bin->shdr[i].sh_size; j += tsize, k++) {
if (ELF_R_SYM(rel[k].r_info) == sym) {
if (lseek(bin->fd, rel[k].r_offset-bin->baddr-got_offset, SEEK_SET)
!= rel[k].r_offset-bin->baddr-got_offset) {
perror("lseek (got)");
return -1;
}
if (read(bin->fd, &plt_sym_addr, sizeof(Elf_(Addr))) != sizeof(Elf_(Addr))) {
perror("read (got)");
return -1;
}
return (u64)(plt_sym_addr - 6);
}
}
break;
}
return -1;
}
@ -518,11 +484,11 @@ struct r_bin_elf_symbol_t* Elf_(r_bin_elf_get_symbols)(struct Elf_(r_bin_elf_obj
return NULL;
}
for (j = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Sym))) {
r_mem_copyendian((u8*)&(sym[i].st_name), (u8*)&(sym[i].st_name), sizeof(Elf_(Word)), !bin->endian);
r_mem_copyendian((u8*)&(sym[i].st_value), (u8*)&(sym[i].st_value), sizeof(Elf_(Addr)), !bin->endian);
r_mem_copyendian((u8*)&(sym[i].st_size), (u8*)&(sym[i].st_size), sizeof(Elf_Vword), !bin->endian);
r_mem_copyendian((u8*)&(sym[i].st_shndx), (u8*)&(sym[i].st_shndx), sizeof(Elf_(Section)), !bin->endian);
for (j = k = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Sym)), k++) {
r_mem_copyendian((u8*)&(sym[k].st_name), (u8*)&(sym[k].st_name), sizeof(Elf_(Word)), !bin->endian);
r_mem_copyendian((u8*)&(sym[k].st_value), (u8*)&(sym[k].st_value), sizeof(Elf_(Addr)), !bin->endian);
r_mem_copyendian((u8*)&(sym[k].st_size), (u8*)&(sym[k].st_size), sizeof(Elf_Vword), !bin->endian);
r_mem_copyendian((u8*)&(sym[k].st_shndx), (u8*)&(sym[k].st_shndx), sizeof(Elf_(Section)), !bin->endian);
}
for (j = k = ret_ctr = 0; j < bin->shdr[i].sh_size; j += sizeof(Elf_(Sym)), k++) {