stage2/i386-elf.h - platform/external/grub - Git at Google

 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 2001,2002  Free Software Foundation, Inc.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 /* 32-bit data types */

 typedef unsigned long Elf32_Addr;
 typedef unsigned short Elf32_Half;
 typedef unsigned long Elf32_Off;
 typedef signed long Elf32_Sword;
 typedef unsigned long Elf32_Word;
 /* "unsigned char" already exists */

 /* ELF header */
 typedef struct
 {

 #define EI_NIDENT 16

   /* first four characters are defined below */
 #define EI_MAG0		0
 #define ELFMAG0		0x7f
 #define EI_MAG1		1
 #define ELFMAG1		'E'
 #define EI_MAG2		2
 #define ELFMAG2		'L'
 #define EI_MAG3		3
 #define ELFMAG3		'F'

 #define EI_CLASS	4	/* data sizes */
 #define ELFCLASS32	1	/* i386 -- up to 32-bit data sizes present */

 #define EI_DATA		5	/* data type and ordering */
 #define ELFDATA2LSB	1	/* i386 -- LSB 2's complement */

 #define EI_VERSION	6	/* version number.  "e_version" must be the same */
 #define EV_CURRENT      1	/* current version number */

 #define EI_OSABI	7	/* operating system/ABI indication */
 #define ELFOSABI_FREEBSD	9

 #define EI_ABIVERSION	8	/* ABI version */

 #define EI_PAD		9	/* from here in is just padding */

 #define EI_BRAND	8	/* start of OS branding (This is
 				   obviously illegal against the ELF
 				   standard.) */

   unsigned char e_ident[EI_NIDENT];	/* basic identification block */

 #define ET_EXEC		2	/* we only care about executable types */
   Elf32_Half e_type;		/* file types */

 #define EM_386		3	/* i386 -- obviously use this one */
   Elf32_Half e_machine;	/* machine types */
   Elf32_Word e_version;	/* use same as "EI_VERSION" above */
   Elf32_Addr e_entry;		/* entry point of the program */
   Elf32_Off e_phoff;		/* program header table file offset */
   Elf32_Off e_shoff;		/* section header table file offset */
   Elf32_Word e_flags;		/* flags */
   Elf32_Half e_ehsize;		/* elf header size in bytes */
   Elf32_Half e_phentsize;	/* program header entry size */
   Elf32_Half e_phnum;		/* number of entries in program header */
   Elf32_Half e_shentsize;	/* section header entry size */
   Elf32_Half e_shnum;		/* number of entries in section header */

 #define SHN_UNDEF       0
 #define SHN_LORESERVE   0xff00
 #define SHN_LOPROC      0xff00
 #define SHN_HIPROC      0xff1f
 #define SHN_ABS         0xfff1
 #define SHN_COMMON      0xfff2
 #define SHN_HIRESERVE   0xffff
   Elf32_Half e_shstrndx;	/* section header table index */
 }
 Elf32_Ehdr;


 #define BOOTABLE_I386_ELF(h) \
  ((h.e_ident[EI_MAG0] == ELFMAG0) & (h.e_ident[EI_MAG1] == ELFMAG1) \
   & (h.e_ident[EI_MAG2] == ELFMAG2) & (h.e_ident[EI_MAG3] == ELFMAG3) \
   & (h.e_ident[EI_CLASS] == ELFCLASS32) & (h.e_ident[EI_DATA] == ELFDATA2LSB) \
   & (h.e_ident[EI_VERSION] == EV_CURRENT) & (h.e_type == ET_EXEC) \
   & (h.e_machine == EM_386) & (h.e_version == EV_CURRENT))

 /* section table - ? */
 typedef struct
 {
   Elf32_Word	sh_name;		/* Section name (string tbl index) */
   Elf32_Word	sh_type;		/* Section type */
   Elf32_Word	sh_flags;		/* Section flags */
   Elf32_Addr	sh_addr;		/* Section virtual addr at execution */
   Elf32_Off	sh_offset;		/* Section file offset */
   Elf32_Word	sh_size;		/* Section size in bytes */
   Elf32_Word	sh_link;		/* Link to another section */
   Elf32_Word	sh_info;		/* Additional section information */
   Elf32_Word	sh_addralign;		/* Section alignment */
   Elf32_Word	sh_entsize;		/* Entry size if section holds table */
 }
 Elf32_Shdr;

 /* symbol table - page 4-25, figure 4-15 */
 typedef struct
 {
   Elf32_Word st_name;
   Elf32_Addr st_value;
   Elf32_Word st_size;
   unsigned char st_info;
   unsigned char st_other;
   Elf32_Half st_shndx;
 }
 Elf32_Sym;

 /* symbol type and binding attributes - page 4-26 */

 #define ELF32_ST_BIND(i)    ((i) >> 4)
 #define ELF32_ST_TYPE(i)    ((i) & 0xf)
 #define ELF32_ST_INFO(b,t)  (((b)<<4)+((t)&0xf))

 /* symbol binding - page 4-26, figure 4-16 */

 #define STB_LOCAL    0
 #define STB_GLOBAL   1
 #define STB_WEAK     2
 #define STB_LOPROC  13
 #define STB_HIPROC  15

 /* symbol types - page 4-28, figure 4-17 */

 #define STT_NOTYPE   0
 #define STT_OBJECT   1
 #define STT_FUNC     2
 #define STT_SECTION  3
 #define STT_FILE     4
 #define STT_LOPROC  13
 #define STT_HIPROC  15


 /* Macros to split/combine relocation type and symbol page 4-32 */

 #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 - page 5-2, figure 5-1 */

 typedef struct
 {
   Elf32_Word p_type;
   Elf32_Off p_offset;
   Elf32_Addr p_vaddr;
   Elf32_Addr p_paddr;
   Elf32_Word p_filesz;
   Elf32_Word p_memsz;
   Elf32_Word p_flags;
   Elf32_Word p_align;
 }
 Elf32_Phdr;

 /* segment types - page 5-3, figure 5-2 */

 #define PT_NULL		0
 #define PT_LOAD		1
 #define PT_DYNAMIC	2
 #define PT_INTERP	3
 #define PT_NOTE		4
 #define PT_SHLIB	5
 #define PT_PHDR		6

 #define PT_LOPROC	0x70000000
 #define PT_HIPROC	0x7fffffff

 /* segment permissions - page 5-6 */

 #define PF_X		0x1
 #define PF_W		0x2
 #define PF_R		0x4
 #define PF_MASKPROC	0xf0000000


 /* dynamic structure - page 5-15, figure 5-9 */

 typedef struct
 {
   Elf32_Sword d_tag;
   union
   {
     Elf32_Word d_val;
     Elf32_Addr d_ptr;
   }
   d_un;
 }
 Elf32_Dyn;

 /* Dynamic array tags - page 5-16, figure 5-10.  */

 #define DT_NULL		0
 #define DT_NEEDED	1
 #define DT_PLTRELSZ	2
 #define DT_PLTGOT	3
 #define DT_HASH		4
 #define DT_STRTAB	5
 #define DT_SYMTAB	6
 #define DT_RELA		7
 #define DT_RELASZ	8
 #define DT_RELAENT      9
 #define DT_STRSZ	10
 #define DT_SYMENT	11
 #define DT_INIT		12
 #define DT_FINI		13
 #define DT_SONAME	14
 #define DT_RPATH	15
 #define DT_SYMBOLIC	16
 #define DT_REL		17
 #define DT_RELSZ	18
 #define DT_RELENT	19
 #define DT_PLTREL	20
 #define DT_DEBUG	21
 #define DT_TEXTREL	22
 #define DT_JMPREL	23
	/*
	* GRUB -- GRand Unified Bootloader
	* Copyright (C) 2001,2002 Free Software Foundation, Inc.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	/* 32-bit data types */

	typedef unsigned long Elf32_Addr;
	typedef unsigned short Elf32_Half;
	typedef unsigned long Elf32_Off;
	typedef signed long Elf32_Sword;
	typedef unsigned long Elf32_Word;
	/* "unsigned char" already exists */

	/* ELF header */
	typedef struct
	{

	#define EI_NIDENT 16

	/* first four characters are defined below */
	#define EI_MAG0 0
	#define ELFMAG0 0x7f
	#define EI_MAG1 1
	#define ELFMAG1 'E'
	#define EI_MAG2 2
	#define ELFMAG2 'L'
	#define EI_MAG3 3
	#define ELFMAG3 'F'

	#define EI_CLASS 4 /* data sizes */
	#define ELFCLASS32 1 /* i386 -- up to 32-bit data sizes present */

	#define EI_DATA 5 /* data type and ordering */
	#define ELFDATA2LSB 1 /* i386 -- LSB 2's complement */

	#define EI_VERSION 6 /* version number. "e_version" must be the same */
	#define EV_CURRENT 1 /* current version number */

	#define EI_OSABI 7 /* operating system/ABI indication */
	#define ELFOSABI_FREEBSD 9

	#define EI_ABIVERSION 8 /* ABI version */

	#define EI_PAD 9 /* from here in is just padding */

	#define EI_BRAND 8 /* start of OS branding (This is
	obviously illegal against the ELF
	standard.) */

	unsigned char e_ident[EI_NIDENT]; /* basic identification block */

	#define ET_EXEC 2 /* we only care about executable types */
	Elf32_Half e_type; /* file types */

	#define EM_386 3 /* i386 -- obviously use this one */
	Elf32_Half e_machine; /* machine types */
	Elf32_Word e_version; /* use same as "EI_VERSION" above */
	Elf32_Addr e_entry; /* entry point of the program */
	Elf32_Off e_phoff; /* program header table file offset */
	Elf32_Off e_shoff; /* section header table file offset */
	Elf32_Word e_flags; /* flags */
	Elf32_Half e_ehsize; /* elf header size in bytes */
	Elf32_Half e_phentsize; /* program header entry size */
	Elf32_Half e_phnum; /* number of entries in program header */
	Elf32_Half e_shentsize; /* section header entry size */
	Elf32_Half e_shnum; /* number of entries in section header */

	#define SHN_UNDEF 0
	#define SHN_LORESERVE 0xff00
	#define SHN_LOPROC 0xff00
	#define SHN_HIPROC 0xff1f
	#define SHN_ABS 0xfff1
	#define SHN_COMMON 0xfff2
	#define SHN_HIRESERVE 0xffff
	Elf32_Half e_shstrndx; /* section header table index */
	}
	Elf32_Ehdr;


	#define BOOTABLE_I386_ELF(h) \
	((h.e_ident[EI_MAG0] == ELFMAG0) & (h.e_ident[EI_MAG1] == ELFMAG1) \
	& (h.e_ident[EI_MAG2] == ELFMAG2) & (h.e_ident[EI_MAG3] == ELFMAG3) \
	& (h.e_ident[EI_CLASS] == ELFCLASS32) & (h.e_ident[EI_DATA] == ELFDATA2LSB) \
	& (h.e_ident[EI_VERSION] == EV_CURRENT) & (h.e_type == ET_EXEC) \
	& (h.e_machine == EM_386) & (h.e_version == EV_CURRENT))

	/* section table - ? */
	typedef struct
	{
	Elf32_Word sh_name; /* Section name (string tbl index) */
	Elf32_Word sh_type; /* Section type */
	Elf32_Word sh_flags; /* Section flags */
	Elf32_Addr sh_addr; /* Section virtual addr at execution */
	Elf32_Off sh_offset; /* Section file offset */
	Elf32_Word sh_size; /* Section size in bytes */
	Elf32_Word sh_link; /* Link to another section */
	Elf32_Word sh_info; /* Additional section information */
	Elf32_Word sh_addralign; /* Section alignment */
	Elf32_Word sh_entsize; /* Entry size if section holds table */
	}
	Elf32_Shdr;

	/* symbol table - page 4-25, figure 4-15 */
	typedef struct
	{
	Elf32_Word st_name;
	Elf32_Addr st_value;
	Elf32_Word st_size;
	unsigned char st_info;
	unsigned char st_other;
	Elf32_Half st_shndx;
	}
	Elf32_Sym;

	/* symbol type and binding attributes - page 4-26 */

	#define ELF32_ST_BIND(i) ((i) >> 4)
	#define ELF32_ST_TYPE(i) ((i) & 0xf)
	#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))

	/* symbol binding - page 4-26, figure 4-16 */

	#define STB_LOCAL 0
	#define STB_GLOBAL 1
	#define STB_WEAK 2
	#define STB_LOPROC 13
	#define STB_HIPROC 15

	/* symbol types - page 4-28, figure 4-17 */

	#define STT_NOTYPE 0
	#define STT_OBJECT 1
	#define STT_FUNC 2
	#define STT_SECTION 3
	#define STT_FILE 4
	#define STT_LOPROC 13
	#define STT_HIPROC 15


	/* Macros to split/combine relocation type and symbol page 4-32 */

	#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 - page 5-2, figure 5-1 */

	typedef struct
	{
	Elf32_Word p_type;
	Elf32_Off p_offset;
	Elf32_Addr p_vaddr;
	Elf32_Addr p_paddr;
	Elf32_Word p_filesz;
	Elf32_Word p_memsz;
	Elf32_Word p_flags;
	Elf32_Word p_align;
	}
	Elf32_Phdr;

	/* segment types - page 5-3, figure 5-2 */

	#define PT_NULL 0
	#define PT_LOAD 1
	#define PT_DYNAMIC 2
	#define PT_INTERP 3
	#define PT_NOTE 4
	#define PT_SHLIB 5
	#define PT_PHDR 6

	#define PT_LOPROC 0x70000000
	#define PT_HIPROC 0x7fffffff

	/* segment permissions - page 5-6 */

	#define PF_X 0x1
	#define PF_W 0x2
	#define PF_R 0x4
	#define PF_MASKPROC 0xf0000000


	/* dynamic structure - page 5-15, figure 5-9 */

	typedef struct
	{
	Elf32_Sword d_tag;
	union
	{
	Elf32_Word d_val;
	Elf32_Addr d_ptr;
	}
	d_un;
	}
	Elf32_Dyn;

	/* Dynamic array tags - page 5-16, figure 5-10. */

	#define DT_NULL 0
	#define DT_NEEDED 1
	#define DT_PLTRELSZ 2
	#define DT_PLTGOT 3
	#define DT_HASH 4
	#define DT_STRTAB 5
	#define DT_SYMTAB 6
	#define DT_RELA 7
	#define DT_RELASZ 8
	#define DT_RELAENT 9
	#define DT_STRSZ 10
	#define DT_SYMENT 11
	#define DT_INIT 12
	#define DT_FINI 13
	#define DT_SONAME 14
	#define DT_RPATH 15
	#define DT_SYMBOLIC 16
	#define DT_REL 17
	#define DT_RELSZ 18
	#define DT_RELENT 19
	#define DT_PLTREL 20
	#define DT_DEBUG 21
	#define DT_TEXTREL 22
	#define DT_JMPREL 23