From: "Anthony G. Basile" <blueness@gentoo.org>
To: gentoo-commits@lists.gentoo.org
Subject: [gentoo-commits] proj/elfix:master commit in: misc/elf-abi/
Date: Tue, 6 Jan 2015 17:26:10 +0000 (UTC) [thread overview]
Message-ID: <1420565232.51e620eef945c3af2c2d8c92fedbacb99ba55d3d.blueness@gentoo> (raw)
commit: 51e620eef945c3af2c2d8c92fedbacb99ba55d3d
Author: Anthony G. Basile <blueness <AT> gentoo <DOT> org>
AuthorDate: Tue Jan 6 17:27:12 2015 +0000
Commit: Anthony G. Basile <blueness <AT> gentoo <DOT> org>
CommitDate: Tue Jan 6 17:27:12 2015 +0000
URL: http://sources.gentoo.org/gitweb/?p=proj/elfix.git;a=commit;h=51e620ee
misc/elf-abi: sort out EM numbers for gentoo -- except mips
---
misc/elf-abi/elf-abi.c | 116 +++++++++++++++++++++++--------------------------
1 file changed, 55 insertions(+), 61 deletions(-)
diff --git a/misc/elf-abi/elf-abi.c b/misc/elf-abi/elf-abi.c
index fb53391..13ec542 100644
--- a/misc/elf-abi/elf-abi.c
+++ b/misc/elf-abi/elf-abi.c
@@ -58,50 +58,38 @@
#include <unistd.h>
#include <fcntl.h>
-/* We steal this from <elf.h> but don't include it so as to not increase our dependancies. */
+/* We reorder the big endian EM_ numbers to avoid also reading endian information from
+ * the Elf file. For a mapping between common macine names and EM_ see <elf.h>. For a
+ * more complete mapping, see elfutil's machines[] defined in libebl/eblopenbackend.c.
+ */
#define ELFMAG "\177ELF"
#define ELFCLASS32 1 /* 32-bit objects */
#define ELFCLASS64 2 /* 64-bit objects */
-#define EM_SPARC 2 /* SUN SPARC */
-#define EM_386 3 /* Intel 80386 */
-#define EM_68K 4 /* Motorola m68k family */
+#define EM_ALPHA 0x9026 /* alpha */
+#define EM_ARM 40 /* arm */
+#define EM_AARCH64 183 /* arm64 */
+#define EM_PARISC_BE 0x0F00 /* hppa - big endian reordering of EM_PARISC = 15 */
+#define EM_IA_64 50 /* ia64 */
+#define EM_68K_BE 0x0400 /* m68k - big endian reordering of EM_68K = 4 */
+
#define EM_MIPS 8 /* MIPS R3000 big-endian */
#define EM_MIPS_RS3_LE 10 /* MIPS R3000 little-endian */
-#define EM_PARISC 15 /* HPPA */
-#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
-#define EM_PPC 20 /* PowerPC */
-#define EM_PPC64 21 /* PowerPC 64-bit */
-#define EM_S390 22 /* IBM S390 */
-#define EM_ARM 40 /* ARM */
-#define EM_FAKE_ALPHA 41 /* Digital Alpha */
-#define EM_SH 42 /* Hitachi SH */
-#define EM_SPARCV9 43 /* SPARC v9 64-bit */
-#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 /* Unofficial, but needed in Gentoo */
-#define EM_HPPA 0x0F00 /* Unofficial, but needed in Gentoo */
-#define EF_MIPS_ABI 0x0000F000
-#define E_MIPS_ABI_O32 0x00001000
+#define EM_PPC_BE 0x1400 /* ppc - big endian reordering of EM_PPC = 20 */
+#define EM_PPC64_BE 0x1500 /* ppc64 - bit endian reordering of EM_PPC64 = 21 */
+#define EM_S390_BE 0x1600 /* s390 - big endian reordering of EM_S390 */
+#define EM_SH 42 /* Hitachi SH */
+#define EM_SPARC32_BE 0x1200 /* sparc - big endian reordering of EM_SPARC32PLUS = 18 */
+#define EM_SPARC64_BE 0x2B00 /* sparc - big endian reordinger of EM_SPARCV9 = 43 */
+#define EM_386 3 /* x86 */
+#define EM_X86_64 62 /* amd64 */
-#define EF_ARM_EABIMASK 0XFF000000
-
-
-int
-get_wordsize(uint8_t ei_class)
-{
- switch (ei_class) {
- case ELFCLASS32:
- return 32;
- case ELFCLASS64:
- return 64;
- default:
- return 0;
- }
-}
+/* The arm and mips ABI flags housed in e_flags */
+#define EF_MIPS_ABI 0x0000F000 /* Mask for mips ABI */
+#define E_MIPS_ABI_O32 0x00001000 /* Value for o32 */
+#define EF_ARM_EABIMASK 0XFF000000 /* Mask for arm EABI - we dont' destinguish versions */
char *
@@ -115,21 +103,8 @@ get_abi(uint16_t e_machine, int width, uint32_t e_flags)
/* alpha: We support only one 64-bit ABI. */
case EM_ALPHA:
- case EM_FAKE_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:
- 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:
if (e_flags & EF_ARM_EABIMASK)
@@ -142,7 +117,7 @@ get_abi(uint16_t e_machine, int width, uint32_t e_flags)
return "arm_64";
/* m68k: We support only one 32-bit ABI. */
- case EM_68K:
+ case EM_68K_BE:
return "m68k_32";
/* mips: We support o32, n32 and n64. The first is 32-bits and the
@@ -163,20 +138,19 @@ get_abi(uint16_t e_machine, int width, uint32_t e_flags)
return "ia_64";
/* hppa: We support only one 32-bit ABI. */
- case EM_PARISC:
- case EM_HPPA:
+ case EM_PARISC_BE:
return "hppa_32";
/* ppc: We support only one 32-bit ABI. */
- case EM_PPC:
+ case EM_PPC_BE:
return "ppc_32";
/* ppc64: We support only one 64-bit ABI. */
- case EM_PPC64:
+ case EM_PPC64_BE:
return "ppc_64";
/* s390: We support one 32-bit and one 64-bit ABI. */
- case EM_S390:
+ case EM_S390_BE:
if (width == 64)
return "s390_64";
else
@@ -187,13 +161,22 @@ get_abi(uint16_t e_machine, int width, uint32_t e_flags)
return "sh_32";
/* sparc: We support one 32-bit and one 64-bit ABI. */
- case EM_SPARC32PLUS:
- case EM_SPARCV9:
- case EM_SPARC:
+ case EM_SPARC32_BE:
+ return "sparc_32";
+ case EM_SPARC64_BE:
+ return "sparc_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_386:
+ return "x86_32";
+ case EM_X86_64:
if (width == 64)
- return "sparc_64";
+ return "x86_64";
else
- return "sparc_32";
+ return "x86_x32";
default:
return "unknown";
@@ -231,10 +214,19 @@ main(int argc, char* argv[])
if (strncmp(magic, ELFMAG, 4) != 0)
errx(1, "%s is not an ELF object", argv[1]);
- /* 32 or 64 bits? */
+ /* 32 or 64 bits machine word size? */
if (read(fd, &ei_class, 1) == -1)
err(1, "read() ei_class failed");
- width = get_wordsize(ei_class);
+ switch (ei_class) {
+ case ELFCLASS32:
+ width = 32;
+ break;
+ case ELFCLASS64:
+ width = 64;
+ break;
+ default:
+ errx(1, "Unknown machine word size.");
+ }
/*
All Elf files begin with the following Elf header:
@@ -261,6 +253,8 @@ main(int argc, char* argv[])
err(1, "lseek() e_machine failed");
if (read(fd, &e_machine, 2) == -1)
err(1, "read() e_machine failed");
+ printf("%x\n", e_machine);
+ printf("%d\n", e_machine);
if (lseek(fd, e_flags_offset, SEEK_SET) == -1)
err(1, "lseek() e_flags failed");
next reply other threads:[~2015-01-06 17:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-06 17:26 Anthony G. Basile [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-01-06 21:43 [gentoo-commits] proj/elfix:master commit in: misc/elf-abi/ Anthony G. Basile
2015-01-06 21:34 Anthony G. Basile
2015-01-06 20:47 Anthony G. Basile
2015-01-06 18:22 Anthony G. Basile
2015-01-06 15:13 Anthony G. Basile
2015-01-05 16:26 Anthony G. Basile
2015-01-05 16:23 Anthony G. Basile
2015-01-03 23:53 Anthony G. Basile
2015-01-03 23:49 Anthony G. Basile
2015-01-03 23:19 Anthony G. Basile
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