int gelf_update_dyn(Elf_Data *ed, int ndx, GElf_Dyn *ds) { int ec; Elf *e; size_t msz; Elf_Scn *scn; Elf32_Dyn *dyn32; Elf64_Dyn *dyn64; uint32_t sh_type; struct _Libelf_Data *d; d = (struct _Libelf_Data *) ed; if (d == NULL || ndx < 0 || ds == NULL || (scn = d->d_scn) == NULL || (e = scn->s_elf) == NULL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } ec = e->e_class; assert(ec == ELFCLASS32 || ec == ELFCLASS64); if (ec == ELFCLASS32) sh_type = scn->s_shdr.s_shdr32.sh_type; else sh_type = scn->s_shdr.s_shdr64.sh_type; if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } msz = _libelf_msize(ELF_T_DYN, ec, e->e_version); assert(msz > 0); assert(ndx >= 0); if (msz * (size_t) ndx >= d->d_data.d_size) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } if (ec == ELFCLASS32) { dyn32 = (Elf32_Dyn *) d->d_data.d_buf + ndx; LIBELF_COPY_S32(dyn32, ds, d_tag); LIBELF_COPY_U32(dyn32, ds, d_un.d_val); } else { dyn64 = (Elf64_Dyn *) d->d_data.d_buf + ndx; *dyn64 = *ds; } return (1); }
int gelf_update_rela(Elf_Data *d, int ndx, GElf_Rela *dr) { int ec; Elf *e; Elf_Scn *scn; Elf32_Rela *rela32; Elf64_Rela *rela64; size_t msz; uint32_t sh_type; if (d == NULL || ndx < 0 || dr == NULL || (scn = d->d_scn) == NULL || (e = scn->s_elf) == NULL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } ec = e->e_class; assert(ec == ELFCLASS32 || ec == ELFCLASS64); if (ec == ELFCLASS32) sh_type = scn->s_shdr.s_shdr32.sh_type; else sh_type = scn->s_shdr.s_shdr64.sh_type; if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } msz = _libelf_msize(ELF_T_RELA, ec, e->e_version); assert(msz > 0); if (msz * ndx >= d->d_size) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } if (ec == ELFCLASS32) { rela32 = (Elf32_Rela *) d->d_buf + ndx; LIBELF_COPY_U32(rela32, dr, r_offset); if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) || ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) { LIBELF_SET_ERROR(RANGE, 0); return (0); } rela32->r_info = ELF32_R_INFO(ELF64_R_SYM(dr->r_info), ELF64_R_TYPE(dr->r_info)); LIBELF_COPY_S32(rela32, dr, r_addend); } else { rela64 = (Elf64_Rela *) d->d_buf + ndx; *rela64 = *dr; } return (1); }