#include #include #include #include #include #include struct grub_module_verifier_arch archs[] = { { "i386", 4, 0, EM_386, GRUB_MODULE_VERIFY_SUPPORTS_REL, (int[]){ R_386_32, R_386_PC32, -1 } }, { "x86_64", 8, 0, EM_X86_64, GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_X86_64_64, R_X86_64_PC64, /* R_X86_64_32, R_X86_64_32S are supported but shouldn't be used because of their limited range. */ -1 }, (int[]){ R_X86_64_PC32, R_X86_64_PLT32, -1 } }, { "powerpc", 4, 1, EM_PPC, GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ GRUB_ELF_R_PPC_ADDR16_LO, GRUB_ELF_R_PPC_REL24, /* It has limited range but GRUB adds trampolines when necessarry. */ GRUB_ELF_R_PPC_ADDR16_HA, GRUB_ELF_R_PPC_ADDR32, GRUB_ELF_R_PPC_REL32, -1 } }, { "sparc64", 8, 1, EM_SPARCV9, GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_SPARC_WDISP30, /* It has limited range but GRUB adds trampolines when necessarry. */ R_SPARC_HH22, R_SPARC_HM10, R_SPARC_LM22, R_SPARC_LO10, R_SPARC_64, R_SPARC_OLO10, /* Following 2 relocations have limited range but unfortunately clang generates them, as it doesn't implement mcmodel=large properly. At least our heap and core are under 4G, so it's not a problem usually. */ R_SPARC_HI22, R_SPARC_32, -1 } }, { "ia64", 8, 0, EM_IA_64, GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_IA64_PCREL21B, /* We should verify that it's pointing either to a function or to a section in the same module. Checking that external symbol is a function is non-trivial and I have never seen this relocation used for anything else, so assume that it always points to a function. */ R_IA64_SEGREL64LSB, R_IA64_FPTR64LSB, R_IA64_DIR64LSB, R_IA64_PCREL64LSB, R_IA64_LTOFF22X, R_IA64_LTOFF22, R_IA64_GPREL64I, R_IA64_LTOFF_FPTR22, R_IA64_LDXMOV, -1 }, (int[]){ R_IA64_GPREL22, -1 } }, { "mipsel", 4, 0, EM_MIPS, GRUB_MODULE_VERIFY_SUPPORTS_REL | GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_MIPS_HI16, R_MIPS_LO16, R_MIPS_32, R_MIPS_GPREL32, R_MIPS_26, R_MIPS_GOT16, R_MIPS_CALL16, R_MIPS_JALR, -1 } }, { "mips", 4, 1, EM_MIPS, GRUB_MODULE_VERIFY_SUPPORTS_REL | GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_MIPS_HI16, R_MIPS_LO16, R_MIPS_32, R_MIPS_GPREL32, R_MIPS_26, R_MIPS_GOT16, R_MIPS_CALL16, R_MIPS_JALR, -1 } }, { "arm", 4, 0, EM_ARM, GRUB_MODULE_VERIFY_SUPPORTS_REL, (int[]){ /* Some relocations are range-limited but trampolines are added when necessarry. */ R_ARM_ABS32, R_ARM_CALL, R_ARM_JUMP24, R_ARM_THM_CALL, R_ARM_THM_JUMP24, R_ARM_V4BX, R_ARM_THM_MOVW_ABS_NC, R_ARM_THM_MOVT_ABS, R_ARM_THM_JUMP19, -1 } }, { "arm64", 8, 0, EM_AARCH64, GRUB_MODULE_VERIFY_SUPPORTS_REL | GRUB_MODULE_VERIFY_SUPPORTS_RELA, (int[]){ R_AARCH64_ABS64, R_AARCH64_CALL26, R_AARCH64_JUMP26, R_AARCH64_ADR_GOT_PAGE, R_AARCH64_LD64_GOT_LO12_NC, -1 }, (int[]){ R_AARCH64_ADR_PREL_PG_HI21, R_AARCH64_ADD_ABS_LO12_NC, R_AARCH64_LDST64_ABS_LO12_NC, R_AARCH64_PREL32, -1 } }, }; struct platform_whitelist { const char *arch; const char *platform; const char **whitelist_empty; }; static struct platform_whitelist whitelists[] = { {"i386", "xen", (const char *[]) {"all_video", 0}}, {"x86_64", "xen", (const char *[]) {"all_video", 0}}, {"sparc64", "ieee1275", (const char *[]) {"all_video", 0}}, /* video is compiled-in on MIPS. */ {"mipsel", "loongson", (const char *[]) {"all_video", 0}}, {"mipsel", "qemu_mips", (const char *[]) {"all_video", 0}}, {"mipsel", "arc", (const char *[]) {"all_video", 0}}, {"mips", "qemu_mips", (const char *[]) {"all_video", 0}}, {"mips", "arc", (const char *[]) {"all_video", 0}}, }; int main (int argc, char **argv) { size_t module_size; unsigned arch, whitelist; const char **whitelist_empty = 0; char *module_img; if (argc != 4) { fprintf (stderr, "usage: %s FILE ARCH PLATFORM\n", argv[0]); return 1; } for (arch = 0; arch < ARRAY_SIZE(archs); arch++) if (strcmp(archs[arch].name, argv[2]) == 0) break; if (arch == ARRAY_SIZE(archs)) grub_util_error("unknown arch: %s", argv[2]); for (whitelist = 0; whitelist < ARRAY_SIZE(whitelists); whitelist++) if (strcmp(whitelists[whitelist].arch, argv[2]) == 0 && strcmp(whitelists[whitelist].platform, argv[3]) == 0) break; if (whitelist != ARRAY_SIZE(whitelists)) whitelist_empty = whitelists[whitelist].whitelist_empty; module_size = grub_util_get_image_size (argv[1]); module_img = grub_util_read_image (argv[1]); if (archs[arch].voidp_sizeof == 8) grub_module_verify64(module_img, module_size, &archs[arch], whitelist_empty); else grub_module_verify32(module_img, module_size, &archs[arch], whitelist_empty); return 0; }