linux-sgx-trts-modified/common/inc/internal/elfheader

Note, the files `elf_common.h' and `elfstructs.h' are from FreeBSD.
git://github.com/freebsd/freebsd.git

But with slight modifications shown below:

diff --git a/sys/sys/elf_common.h b/sys/sys/elf_common.h
index 8f02ef1..7601abb 100644
--- a/sys/sys/elf_common.h
+++ b/sys/sys/elf_common.h
@@ -30,6 +30,9 @@
#ifndef _SYS_ELF_COMMON_H_
#define _SYS_ELF_COMMON_H_ 1

+typedef uint32_t u_int32_t;
+typedef uint32_t Elf_Symndx;
+
/*
* ELF definitions that are independent of architecture or word size.
*/
@@ -117,9 +120,6 @@ typedef struct {
#define ELFOSABI_ARM 97 /* ARM */
#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */

-#define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */
-#define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */
-
/* e_ident */
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
@@ -242,7 +242,6 @@ typedef struct {
#define EM_486 6 /* Intel i486. */
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
#define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */
-#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */

/* Special section indexes. */
#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
@@ -441,6 +440,8 @@ typedef struct {
#define DT_MOVETAB 0x6ffffefe /* move table */
#define DT_SYMINFO 0x6ffffeff /* syminfo table */
#define DT_ADDRRNGHI 0x6ffffeff
+#define DT_ADDRTAGIDX(tag) (DT_ADDRRNGHI - (tag)) /* Reverse order! */
+#define DT_ADDRNUM 11

#define DT_VERSYM 0x6ffffff0 /* Address of versym section. */
#define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */
@@ -505,12 +506,9 @@ typedef struct {
#define STT_FILE 4 /* Source file. */
#define STT_COMMON 5 /* Uninitialized common block. */
#define STT_TLS 6 /* TLS object. */
-#define STT_NUM 7
#define STT_LOOS 10 /* Reserved range for operating system */
#define STT_GNU_IFUNC 10
#define STT_HIOS 12 /* specific semantics. */
-#define STT_LOPROC 13 /* reserved range for processor */
-#define STT_HIPROC 15 /* specific semantics. */

/* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */
#define STV_DEFAULT 0x0 /* Default visibility (see binding). */