static char* _elf_item(Elf *elf, Elf_Type type, size_t n, size_t off, int *flag) { Elf_Data src, dst; *flag = 0; elf_assert(n); elf_assert(valid_type(type)); if (off > elf->e_size) { seterr(ERROR_OUTSIDE); return NULL; } src.d_type = type; src.d_version = elf->e_version; src.d_size = n * _fsize(elf->e_class, src.d_version, type); elf_assert(src.d_size); if ((elf->e_size - off) < src.d_size) { seterr(truncerr(type)); return NULL; } dst.d_version = _elf_version; dst.d_size = n * _msize(elf->e_class, dst.d_version, type); elf_assert(dst.d_size); elf_assert(elf->e_data); if (elf->e_rawdata != elf->e_data && dst.d_size <= src.d_size) { dst.d_buf = elf->e_data + off; } else if (!(dst.d_buf = malloc(dst.d_size))) { seterr(memerr(type)); return NULL; } else { *flag = 1; } if (elf->e_rawdata) { src.d_buf = elf->e_rawdata + off; } else { src.d_buf = elf->e_data + off; } if (_elf_xlatetom(elf, &dst, &src)) { if (!*flag) { elf->e_cooked = 1; } return (char*)dst.d_buf; } if (*flag) { free(dst.d_buf); *flag = 0; } return NULL; }
static char* _elf_item(void *buf, Elf *elf, Elf_Type type, size_t off) { Elf_Data src, dst; elf_assert(valid_type(type)); if (off < 0 || off > elf->e_size) { seterr(ERROR_OUTSIDE); return NULL; } src.d_type = type; src.d_version = elf->e_version; src.d_size = _fsize(elf->e_class, src.d_version, type); elf_assert(src.d_size); if ((elf->e_size - off) < src.d_size) { seterr(truncerr(type)); return NULL; } dst.d_version = _elf_version; dst.d_size = _msize(elf->e_class, dst.d_version, type); elf_assert(dst.d_size); if (!(dst.d_buf = buf) && !(dst.d_buf = malloc(dst.d_size))) { seterr(memerr(type)); return NULL; } elf_assert(elf->e_data); if (elf->e_rawdata) { src.d_buf = elf->e_rawdata + off; } else { src.d_buf = elf->e_data + off; } if (_elf_xlatetom(elf, &dst, &src)) { return (char*)dst.d_buf; } if (dst.d_buf != buf) { free(dst.d_buf); } return NULL; }