diff options
| -rw-r--r-- | misc/elf-abi/elf-abi.c | 147 |
1 files changed, 85 insertions, 62 deletions
diff --git a/misc/elf-abi/elf-abi.c b/misc/elf-abi/elf-abi.c index 0a271ba..fb53391 100644 --- a/misc/elf-abi/elf-abi.c +++ b/misc/elf-abi/elf-abi.c @@ -7,25 +7,21 @@ * * Supported identifiers: * - * alpha_{32,64} - * arm_{32,64} - * hppa_{32,64} - * ia_{32,64} - * m68k_{32,64} + * alpha_64 + * arm_{oabi,eabi} + * arm_64 + * hppa_32 + * ia_64 + * m68k_32 * mips_{n32,n64,o32} * ppc_{32,64} * s390_{32,64} - * sh_{32,64} + * sh_32 * sparc_{32,64} * x86_{32,x32,64} * * NOTES: * - * * The ABIs referenced by some of the above *_32 and *_64 identifiers - * may be imaginary, but they are listed anyway, since the goal is to - * establish a naming convention that is as consistent and uniform as - * possible. - * * * The Elf header's e_ident[EI_OSABI] byte is completely ignored, * since OS-independence is one of the goals. The assumption is that, * for given installation, we are only interested in tracking multilib @@ -85,19 +81,13 @@ #define EM_IA_64 50 /* Intel Merced */ #define EM_X86_64 62 /* AMD x86-64 architecture */ #define EM_AARCH64 183 /* ARM AARCH64 */ -#define EM_ALPHA 0x9026 +#define EM_ALPHA 0x9026 /* Unofficial, but needed in Gentoo */ +#define EM_HPPA 0x0F00 /* Unofficial, but needed in Gentoo */ -#define EF_MIPS_ABI2 32 -#define EF_MIPS_ABI_ON32 64 -/* -E_MIPS_ABI_O32 = 0x00001000 -E_MIPS_ABI_O64 = 0x00002000 -E_MIPS_ABI_EABI32 = 0x00003000 -E_MIPS_ABI_EABI64 = 0x00004000 -*/ +#define EF_MIPS_ABI 0x0000F000 +#define E_MIPS_ABI_O32 0x00001000 -#define EF_ARM_NEW_ABI 0x80 -#define EF_ARM_OLD_ABI 0x100 +#define EF_ARM_EABIMASK 0XFF000000 int @@ -117,44 +107,100 @@ get_wordsize(uint8_t ei_class) char * get_abi(uint16_t e_machine, int width, uint32_t e_flags) { + /* The following arrives at the abstract ABI name by a process of elimination based on the assumption + * that we are only interested in the ABIs supported in Gentoo. If a new ABIs is added, you need to + * rethink the logic to avoid false positives/negatives. + */ switch(e_machine) { + + /* alpha: We support only one 64-bit ABI. */ case EM_ALPHA: case EM_FAKE_ALPHA: - return "alpha"; + return "alpha_64"; + + /* amd64 + x86: We support X86-64, X86-X32, and X86-32 ABI. The first + * two are 64-bit ABIs and the third is 32-bit. All three will run on + * amd64 architecture, but only the 32-bit will run on the x86 family. + */ case EM_X86_64: - return "amd64"; + if (width == 64) + return "x86_64"; + else + return "x86_x32"; + case EM_386: + return "x86_32"; + + /* arm: We support two 32-bit ABIs, eabi and oabi. */ case EM_ARM: - return "arm"; + if (e_flags & EF_ARM_EABIMASK) + return "arm_eabi"; + else + return "arm_oabi"; + + /* arm64: We support only one 64-bit ABI. */ case EM_AARCH64: - return "arm64"; + return "arm_64"; + + /* m68k: We support only one 32-bit ABI. */ case EM_68K: - return "m68k"; + return "m68k_32"; + + /* mips: We support o32, n32 and n64. The first is 32-bits and the + * latter two are 64-bit ABIs. + */ case EM_MIPS_RS3_LE: case EM_MIPS: - return "mips"; + if (width == 64) + return "mips_n64"; + else + if ((e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32) + return "mips_o32"; + else + return "mips_n32"; + + /* ia64: We support only one 64-bit ABI. */ case EM_IA_64: - return "ia64"; + return "ia_64"; + + /* hppa: We support only one 32-bit ABI. */ case EM_PARISC: - return "hppa"; + case EM_HPPA: + return "hppa_32"; + + /* ppc: We support only one 32-bit ABI. */ case EM_PPC: - return "ppc"; + return "ppc_32"; + + /* ppc64: We support only one 64-bit ABI. */ case EM_PPC64: - return "ppc64"; + return "ppc_64"; + + /* s390: We support one 32-bit and one 64-bit ABI. */ case EM_S390: - return "s390"; + if (width == 64) + return "s390_64"; + else + return "s390_32"; + + /* sh: We support only one 32-bit ABI. */ case EM_SH: - return "sh"; + return "sh_32"; + + /* sparc: We support one 32-bit and one 64-bit ABI. */ case EM_SPARC32PLUS: case EM_SPARCV9: case EM_SPARC: - return "sparc"; - case EM_386: - return "x86"; + if (width == 64) + return "sparc_64"; + else + return "sparc_32"; + default: - return "unknown_arch"; + return "unknown"; } } + int main(int argc, char* argv[]) { @@ -218,35 +264,12 @@ main(int argc, char* argv[]) if (lseek(fd, e_flags_offset, SEEK_SET) == -1) err(1, "lseek() e_flags failed"); - if (read(fd, &e_flags, 2) == -1) + if (read(fd, &e_flags, 4) == -1) err(1, "read() e_flags failed"); abi = get_abi(e_machine, width, e_flags); - printf("%s\n", abi); - -/* - if (!strcmp(arch, "mips")) ; - switch (e_flags & EF_MIPS_ABI) { - case E_MIPS_ABI_O32: - abi = "o32"; - break; - - if mips_abi == E_MIPS_ABI_O32: - name = "o32" - elif mips_abi == E_MIPS_ABI_O64: - name = "o64" - elif mips_abi == E_MIPS_ABI_EABI32: - name = "eabi32" - elif mips_abi == E_MIPS_ABI_EABI64: - name = "eabi64" - elif elf_header.e_flags & EF_MIPS_ABI2: - name = "n32" - elif elf_header.ei_class == ELFCLASS64: - name = "n64" - } -*/ close(fd); exit(EXIT_SUCCESS); } |