int rel2(void)
{
if(rand() % 3 < 2)
return 0;
if(rand() % 4 < 3) { // 75% chance to only change its related Symbol Table index
Elf_Section sym_ndx;
if(rand() % 2)
sym_ndx = rand() % orcHDR->e_shnum; // A random but valid Symbol Table index within the SHT
else
sym_ndx = getElf_Section();
if(orcSHT->sh_type == SHT_REL)
orcREL->r_info = ELF_R_INFO(sym_ndx, ELF_R_TYPE(orcREL->r_info));
else
orcRELA->r_info = ELF_R_INFO(sym_ndx, ELF_R_TYPE(orcRELA->r_info));
} else {
if(orcSHT->sh_type == SHT_REL)
#if defined(__i386__)
orcREL->r_info = getElf_Word();
#elif defined(__x86_64__)
orcREL->r_info = getElf_Xword();
#endif
else
#if defined(__i386__)
orcRELA->r_info = getElf_Word();
#elif defined(__x86_64__)
orcRELA->r_info = getElf_Xword();
#endif
}
void
renum_reloc_syms(Elf_Ehdr * ehdr, Symmap * symmap, int symtabsecnum)
{
Elf_Shdr *pshdr;
int i, j;
int num_reloc;
Elf_Rel *prel;
Elf_RelA *prela;
int symnum;
for (i = 0; i < ehdr->e_shnum; i++) {
pshdr = (Elf_Shdr *) (pexe + ehdr->e_shoff +
(i * ehdr->e_shentsize));
if ((pshdr->sh_type == SHT_RELA) &&
pshdr->sh_link == symtabsecnum) {
#ifdef DEBUG
printf("section %d has rela relocations in symtab\n", i);
#endif
prela = (Elf_RelA *) (pexe + pshdr->sh_offset);
num_reloc = pshdr->sh_size / sizeof(Elf_RelA);
for (j = 0; j < num_reloc; j++) {
symnum = ELF_R_SYM(prela[j].r_info);
#ifdef DEBUG
printf("sym num o %d n %d\n", symnum,
symmap[symnum]);
#endif
prela[j].r_info = ELF_R_INFO(symmap[symnum],
ELF_R_TYPE(prela[j].r_info));
}
}
if ((pshdr->sh_type == SHT_REL) &&
pshdr->sh_link == symtabsecnum) {
#ifdef DEBUG
printf("section %d has rel relocations in symtab\n", i);
#endif
prel = (Elf_Rel *) (pexe + pshdr->sh_offset);
num_reloc = pshdr->sh_size / sizeof(Elf_Rel);
for (j = 0; j < num_reloc; j++) {
symnum = ELF_R_SYM(prel[j].r_info);
#ifdef DEBUG
printf("sym num o %d n %d\n", symnum,
symmap[symnum]);
#endif
prel[j].r_info = ELF_R_INFO(symmap[symnum],
ELF_R_TYPE(prel[j].r_info));
}
}
}
}
/*
* Clear a relocation record. The relocation has been applied to the image and
* thus the relocation must not occur again.
*/
void
clear_reloc(void *vrel)
{
Rela *rel = vrel;
rel->r_offset = 0;
rel->r_info = ELF_R_INFO(0, R_AMD64_NONE);
rel->r_addend = 0;
}