--- /dev/null
+/* $Id: elf_abi.h,v 1.1 1996/02/15 07:36:38 etheisen Exp $
+/*
+ * Copyright (c) 1995 Erik Theisen
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met: * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _ELF_ABI_H_
+#define _ELF_ABI_H_
+
+#include <machine/types.h>
+
+/*
+ * These typedefs need to be handled better -
+ * doesn't work on 64-bit machines. Note:
+ * there currently isn't a 64-bit ABI.
+ */
+typedef u_int32_t Elf32_Addr; /* Unsigned program address */
+typedef u_int32_t Elf32_Off; /* Unsigned file offset */
+typedef int32_t Elf32_Sword; /* Signed large integer */
+typedef u_int32_t Elf32_Word; /* Unsigned large integer */
+typedef u_int16_t Elf32_Half; /* Unsigned medium integer */
+
+/* e_ident[] identification indexes */
+#define EI_MAG0 0 /* file ID */
+#define EI_MAG1 1 /* file ID */
+#define EI_MAG2 2 /* file ID */
+#define EI_MAG3 3 /* file ID */
+#define EI_CLASS 4 /* file class */
+#define EI_DATA 5 /* data encoding */
+#define EI_VERSION 6 /* ELF header version */
+#define EI_PAD 7 /* start of pad bytes */
+#define EI_NIDENT 16 /* Size of e_ident[] */
+
+/* e_ident[] magic number */
+#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */
+#define ELFMAG1 'E' /* e_ident[EI_MAG1] */
+#define ELFMAG2 'L' /* e_ident[EI_MAG2] */
+#define ELFMAG3 'F' /* e_ident[EI_MAG3] */
+#define ELFMAG "\177ELF" /* magic */
+#define SELFMAG 4 /* size of magic */
+
+/* e_ident[] file class */
+#define ELFCLASSNONE 0 /* invalid */
+#define ELFCLASS32 1 /* 32-bit objs */
+#define ELFCLASS64 2 /* 64-bit objs */
+#define ELFCLASSNUM 3 /* number of classes */
+
+/* e_ident[] data encoding */
+#define ELFDATANONE 0 /* invalid */
+#define ELFDATA2LSB 1 /* Little-Endian */
+#define ELFDATA2MSB 2 /* Big-Endian */
+#define ELFDATANUM 3 /* number of data encode defines */
+
+/* e_ident */
+#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
+ (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
+ (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
+ (ehdr).e_ident[EI_MAG3] == ELFMAG3)
+
+/* ELF Header */
+typedef struct elfhdr{
+ unsigned char e_ident[EI_NIDENT]; /* ELF Identification */
+ Elf32_Half e_type; /* object file type */
+ Elf32_Half e_machine; /* machine */
+ Elf32_Word e_version; /* object file version */
+ Elf32_Addr e_entry; /* virtual entry point */
+ Elf32_Off e_phoff; /* program header table offset */
+ Elf32_Off e_shoff; /* section header table offset */
+ Elf32_Word e_flags; /* processor-specific flags */
+ Elf32_Half e_ehsize; /* ELF header size */
+ Elf32_Half e_phentsize; /* program header entry size */
+ Elf32_Half e_phnum; /* number of program header entries */
+ Elf32_Half e_shentsize; /* section header entry size */
+ Elf32_Half e_shnum; /* number of section header entries */
+ Elf32_Half e_shstrndx; /* section header table's "section
+ header string table" entry offset */
+} Elf32_Ehdr;
+
+/* e_type */
+#define ET_NONE 0 /* No file type */
+#define ET_REL 1 /* relocatable file */
+#define ET_EXEC 2 /* executable file */
+#define ET_DYN 3 /* shared object file */
+#define ET_CORE 4 /* core file */
+#define ET_NUM 5 /* number of types */
+#define ET_LOPROC 0xff00 /* reserved range for processor */
+#define ET_HIPROC 0xffff /* specific e_type */
+
+/* e_machine */
+#define EM_NONE 0 /* No Machine */
+#define EM_M32 1 /* AT&T WE 32100 */
+#define EM_SPARC 2 /* SPARC */
+#define EM_386 3 /* Intel 80386 */
+#define EM_68K 4 /* Motorola 68000 */
+#define EM_88K 5 /* Motorola 88000 */
+#define EM_486 6 /* Intel 80486 - unused? */
+#define EM_860 7 /* Intel 80860 */
+#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */
+/*
+ * Don't know if EM_MIPS_RS4_BE,
+ * EM_SPARC64, EM_PARISC,
+ * or EM_PPC are ABI compliant
+ */
+#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
+#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */
+#define EM_PARISC 15 /* HPPA */
+#define EM_PPC 20 /* PowerPC */
+#define EM_NUM 13 /* number of machine types */
+
+/* Version */
+#define EV_NONE 0 /* Invalid */
+#define EV_CURRENT 1 /* Current */
+#define EV_NUM 2 /* number of versions */
+
+/* Section Header */
+typedef struct {
+ Elf32_Word sh_name; /* name - index into section header
+ string table section */
+ Elf32_Word sh_type; /* type */
+ Elf32_Word sh_flags; /* flags */
+ Elf32_Addr sh_addr; /* address */
+ Elf32_Off sh_offset; /* file offset */
+ Elf32_Word sh_size; /* section size */
+ Elf32_Word sh_link; /* section header table index link */
+ Elf32_Word sh_info; /* extra information */
+ Elf32_Word sh_addralign; /* address alignment */
+ Elf32_Word sh_entsize; /* section entry size */
+} Elf32_Shdr;
+
+/* Special Section Indexes */
+#define SHN_UNDEF 0 /* undefined */
+#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */
+#define SHN_LOPROC 0xff00 /* reserved range for processor */
+#define SHN_HIPROC 0xff1f /* specific section indexes */
+#define SHN_ABS 0xfff1 /* absolute value */
+#define SHN_COMMON 0xfff2 /* common symbol */
+#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */
+
+/* sh_type */
+#define SHT_NULL 0 /* inactive */
+#define SHT_PROGBITS 1 /* program defined information */
+#define SHT_SYMTAB 2 /* symbol table section */
+#define SHT_STRTAB 3 /* string table section */
+#define SHT_RELA 4 /* relocation section with addends*/
+#define SHT_HASH 5 /* symbol hash table section */
+#define SHT_DYNAMIC 6 /* dynamic section */
+#define SHT_NOTE 7 /* note section */
+#define SHT_NOBITS 8 /* no space section */
+#define SHT_REL 9 /* relation section without addends */
+#define SHT_SHLIB 10 /* reserved - purpose unknown */
+#define SHT_DYNSYM 11 /* dynamic symbol table section */
+#define SHT_NUM 12 /* number of section types */
+#define SHT_LOPROC 0x70000000 /* reserved range for processor */
+#define SHT_HIPROC 0x7fffffff /* specific section header types */
+#define SHT_LOUSER 0x80000000 /* reserved range for application */
+#define SHT_HIUSER 0xffffffff /* specific indexes */
+
+/* Section names */
+#define ELF_BSS ".bss" /* uninitialized data */
+#define ELF_DATA ".data" /* initialized data */
+#define ELF_DEBUG ".debug" /* debug */
+#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */
+#define ELF_DYNSTR ".dynstr" /* dynamic string table */
+#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */
+#define ELF_FINI ".fini" /* termination code */
+#define ELF_GOT ".got" /* global offset table */
+#define ELF_HASH ".hash" /* symbol hash table */
+#define ELF_INIT ".init" /* initialization code */
+#define ELF_REL_DATA ".rel.data" /* relocation data */
+#define ELF_REL_FINI ".rel.fini" /* relocation termination code */
+#define ELF_REL_INIT ".rel.init" /* relocation initialization code */
+#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */
+#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */
+#define ELF_REL_TEXT ".rel.text" /* relocation code */
+#define ELF_RODATA ".rodata" /* read-only data */
+#define ELF_SHSTRTAB ".shstrtab" /* section header string table */
+#define ELF_STRTAB ".strtab" /* string table */
+#define ELF_SYMTAB ".symtab" /* symbol table */
+#define ELF_TEXT ".text" /* code */
+
+/* Section Attribute Flags - sh_flags */
+#define SHF_WRITE 0x1 /* Writable */
+#define SHF_ALLOC 0x2 /* occupies memory */
+#define SHF_EXECINSTR 0x4 /* executable */
+#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */
+ /* specific section attributes */
+
+/* Symbol Table Entry */
+typedef struct elf32_sym {
+ Elf32_Word st_name; /* name - index into string table */
+ Elf32_Addr st_value; /* symbol value */
+ Elf32_Word st_size; /* symbol size */
+ unsigned char st_info; /* type and binding */
+ unsigned char st_other; /* 0 - no defined meaning */
+ Elf32_Half st_shndx; /* section header index */
+} Elf32_Sym;
+
+/* Symbol table index */
+#define STN_UNDEF 0 /* undefined */
+
+/* Extract symbol info - st_info */
+#define ELF32_ST_BIND(x) ((x) >> 4)
+#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
+#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
+
+/* Symbol Binding - ELF32_ST_BIND - st_info */
+#define STB_LOCAL 0 /* Local symbol */
+#define STB_GLOBAL 1 /* Global symbol */
+#define STB_WEAK 2 /* like global - lower precedence */
+#define STB_NUM 3 /* number of symbol bindings */
+#define STB_LOPROC 13 /* reserved range for processor */
+#define STB_HIPROC 15 /* specific symbol bindings */
+
+/* Symbol type - ELF32_ST_TYPE - st_info */
+#define STT_NOTYPE 0 /* not specified */
+#define STT_OBJECT 1 /* data object */
+#define STT_FUNC 2 /* function */
+#define STT_SECTION 3 /* section */
+#define STT_FILE 4 /* file */
+#define STT_NUM 5 /* number of symbol types */
+#define STT_LOPROC 13 /* reserved range for processor */
+#define STT_HIPROC 15 /* specific symbol types */
+
+/* Relocation entry with implicit addend */
+typedef struct
+{
+ Elf32_Addr r_offset; /* offset of relocation */
+ Elf32_Word r_info; /* symbol table index and type */
+} Elf32_Rel;
+
+/* Relocation entry with explicit addend */
+typedef struct
+{
+ Elf32_Addr r_offset; /* offset of relocation */
+ Elf32_Word r_info; /* symbol table index and type */
+ Elf32_Sword r_addend;
+} Elf32_Rela;
+
+/* Extract relocation info - r_info */
+#define ELF32_R_SYM(i) ((i) >> 8)
+#define ELF32_R_TYPE(i) ((unsigned char) (i))
+#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t))
+
+/* Program Header */
+typedef struct {
+ Elf32_Word p_type; /* segment type */
+ Elf32_Off p_offset; /* segment offset */
+ Elf32_Addr p_vaddr; /* virtual address of segment */
+ Elf32_Addr p_paddr; /* physical address - ignored? */
+ Elf32_Word p_filesz; /* number of bytes in file for seg. */
+ Elf32_Word p_memsz; /* number of bytes in mem. for seg. */
+ Elf32_Word p_flags; /* flags */
+ Elf32_Word p_align; /* memory alignment */
+} Elf32_Phdr;
+
+/* Segment types - p_type */
+#define PT_NULL 0 /* unused */
+#define PT_LOAD 1 /* loadable segment */
+#define PT_DYNAMIC 2 /* dynamic linking section */
+#define PT_INTERP 3 /* the RTLD */
+#define PT_NOTE 4 /* auxiliary information */
+#define PT_SHLIB 5 /* reserved - purpose undefined */
+#define PT_PHDR 6 /* program header */
+#define PT_NUM 7 /* Number of segment types */
+#define PT_LOPROC 0x70000000 /* reserved range for processor */
+#define PT_HIPROC 0x7fffffff /* specific segment types */
+
+/* Segment flags - p_flags */
+#define PF_X 0x1 /* Executable */
+#define PF_W 0x2 /* Writable */
+#define PF_R 0x4 /* Readable */
+#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */
+ /* specific segment flags */
+
+
+#if 0
+#error No ELF RTLD support yet
+/* Dynamic structure */
+typedef struct
+{
+ Elf32_Sword d_tag; /* controls meaning of d_val */
+ union
+ {
+ Elf32_Word d_val; /* Multiple meanings - see d_tag */
+ Elf32_Addr d_ptr; /* program virtual address */
+ } d_un;
+} Elf32_Dyn;
+
+extern Elf32_Dyn _DYNAMIC[];
+
+/* Dynamic Array Tags - d_tag */
+#define DT_NULL 0 /* marks end of _DYNAMIC array */
+#define DT_NEEDED 1 /* string table offset of needed lib */
+#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */
+#define DT_PLTGOT 3 /* address PLT/GOT */
+#define DT_HASH 4 /* address of symbol hash table */
+#define DT_STRTAB 5 /* address of string table */
+#define DT_SYMTAB 6 /* address of symbol table */
+#define DT_RELA 7 /* address of relocation table */
+#define DT_RELASZ 8 /* size of relocation table */
+#define DT_RELAENT 9 /* size of relocation entry */
+#define DT_STRSZ 10 /* size of string table */
+#define DT_SYMENT 11 /* size of symbol table entry */
+#define DT_INIT 12 /* address of initialization func. */
+#define DT_FINI 13 /* address of termination function */
+#define DT_SONAME 14 /* string table offset of shared obj */
+#define DT_RPATH 15 /* string table offset of library
+ /* search path */
+#define DT_SYMBOLIC 16 /* start sym search in shared obj. */
+#define DT_REL 17 /* address of rel. tbl. w addends */
+#define DT_RELSZ 18 /* size of DT_REL relocation table */
+#define DT_RELENT 19 /* size of DT_REL relocation entry */
+#define DT_PLTREL 20 /* PLT referenced relocation entry */
+#define DT_DEBUG 21 /* bugger */
+#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */
+#define DT_JMPREL 23 /* add. of PLT's relocation entries */
+#define DT_LOPROC 0x70000000 /* reserved range for processor */
+#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */
+#endif
+
+
+#endif /* _ELF_ABI_H_ */
+
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