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nasm/output/elf.h
Cyrill Gorcunov a95a8e6d7f output: elf -- Add ELF32_R_INFO, ELF64_R_INFO helpers 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
2017-03-18 15:16:10 +03:00

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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2009 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "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 COPYRIGHT OWNER OR
* CONTRIBUTORS 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 OUTPUT_ELF_H
#define OUTPUT_ELF_H
/*
* Since NASM support both Elf32/64 file formats
* we need to cover all types, structures, typedefs and etc
*/
#include "compiler.h"
/* Segment types */
#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_LOOS 0x60000000
#define PT_HIOS 0x6fffffff
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PT_GNU_EH_FRAME 0x6474e550 /* Extension, eh? */
/* ELF file types */
#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4
#define ET_LOPROC 0xff00
#define ET_HIPROC 0xffff
/* ELF machine types */
#define EM_NONE 0
#define EM_M32 1
#define EM_SPARC 2
#define EM_386 3
#define EM_68K 4
#define EM_88K 5
#define EM_486 6 /* Not used in Linux at least */
#define EM_860 7
#define EM_MIPS 8 /* R3k, bigendian(?) */
#define EM_MIPS_RS4_BE 10 /* R4k BE */
#define EM_PARISC 15
#define EM_SPARC32PLUS 18
#define EM_PPC 20
#define EM_PPC64 21
#define EM_S390 22
#define EM_SH 42
#define EM_SPARCV9 43 /* v9 = SPARC64 */
#define EM_H8_300H 47
#define EM_H8S 48
#define EM_IA_64 50
#define EM_X86_64 62
#define EM_CRIS 76
#define EM_V850 87
#define EM_ALPHA 0x9026 /* Interrim Alpha that stuck around */
#define EM_CYGNUS_V850 0x9080 /* Old v850 ID used by Cygnus */
#define EM_S390_OLD 0xA390 /* Obsolete interrim value for S/390 */
/* Dynamic type values */
#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
#define DT_LOPROC 0x70000000
#define DT_HIPROC 0x7fffffff
/* Auxilliary table entries */
#define AT_NULL 0 /* end of vector */
#define AT_IGNORE 1 /* entry should be ignored */
#define AT_EXECFD 2 /* file descriptor of program */
#define AT_PHDR 3 /* program headers for program */
#define AT_PHENT 4 /* size of program header entry */
#define AT_PHNUM 5 /* number of program headers */
#define AT_PAGESZ 6 /* system page size */
#define AT_BASE 7 /* base address of interpreter */
#define AT_FLAGS 8 /* flags */
#define AT_ENTRY 9 /* entry point of program */
#define AT_NOTELF 10 /* program is not ELF */
#define AT_UID 11 /* real uid */
#define AT_EUID 12 /* effective uid */
#define AT_GID 13 /* real gid */
#define AT_EGID 14 /* effective gid */
#define AT_PLATFORM 15 /* string identifying CPU for optimizations */
#define AT_HWCAP 16 /* arch dependent hints at CPU capabilities */
#define AT_CLKTCK 17 /* frequency at which times() increments */
/* 18..22 = ? */
#define AT_SECURE 23 /* secure mode boolean */
/* Program header permission flags */
#define PF_X 0x1
#define PF_W 0x2
#define PF_R 0x4
/* Section header types */
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_NUM 12
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7fffffff
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xffffffff
/* Section header flags */
#define SHF_WRITE (1 << 0) /* Writable */
#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
#define SHF_EXECINSTR (1 << 2) /* Executable */
#define SHF_MERGE (1 << 4) /* Might be merged */
#define SHF_STRINGS (1 << 5) /* Contains nul-terminated strings */
#define SHF_INFO_LINK (1 << 6) /* `sh_info' contains SHT index */
#define SHF_LINK_ORDER (1 << 7) /* Preserve order after combining */
#define SHF_OS_NONCONFORMING (1 << 8) /* Non-standard OS specific handling required */
#define SHF_GROUP (1 << 9) /* Section is member of a group. */
#define SHF_TLS (1 << 10) /* Section hold thread-local data. */
/* Special section numbers */
#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
/* Section align flag */
#define SHA_ANY 1 /* No alignment constraint */
/* Lenght of magic at the start of a file */
#define EI_NIDENT 16
/* Magic number constants... */
#define EI_MAG0 0 /* e_ident[] indexes */
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4
#define EI_DATA 5
#define EI_VERSION 6
#define EI_OSABI 7
#define EI_ABIVERSION 8
#define EI_NINDENT 16
#define ELFMAG0 0x7f /* EI_MAG */
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFMAG "\177ELF"
#define SELFMAG 4
#define ELFCLASSNONE 0 /* EI_CLASS */
#define ELFCLASS32 1
#define ELFCLASS64 2
#define ELFCLASSNUM 3
#define ELFDATANONE 0 /* e_ident[EI_DATA] */
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2
#define EV_NONE 0 /* e_version, EI_VERSION */
#define EV_CURRENT 1
#define EV_NUM 2
#define ELFOSABI_NONE 0
#define ELFOSABI_LINUX 3
/* Legal values for ST_BIND subfield of st_info (symbol binding). */
#define STB_LOCAL 0 /* Local symbol */
#define STB_GLOBAL 1 /* Global symbol */
#define STB_WEAK 2 /* Weak symbol */
#define STB_NUM 3 /* Number of defined types. */
#define STB_LOOS 10 /* Start of OS-specific */
#define STB_HIOS 12 /* End of OS-specific */
#define STB_LOPROC 13 /* Start of processor-specific */
#define STB_HIPROC 15 /* End of processor-specific */
/* Symbol types */
#define STT_NOTYPE 0 /* Symbol type is unspecified */
#define STT_OBJECT 1 /* Symbol is a data object */
#define STT_FUNC 2 /* Symbol is a code object */
#define STT_SECTION 3 /* Symbol associated with a section */
#define STT_FILE 4 /* Symbol's name is file name */
#define STT_COMMON 5 /* Symbol is a common data object */
#define STT_TLS 6 /* Symbol is thread-local data object*/
#define STT_NUM 7 /* Number of defined types. */
/* Symbol visibilities */
#define STV_DEFAULT 0 /* Default symbol visibility rules */
#define STV_INTERNAL 1 /* Processor specific hidden class */
#define STV_HIDDEN 2 /* Sym unavailable in other modules */
#define STV_PROTECTED 3 /* Not preemptible, not exported */
/* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field */
#define ELF32_ST_BIND(i) ((i) >> 4)
#define ELF32_ST_MKBIND(i) ((i) << 4) /* just a helper */
#define ELF32_ST_TYPE(i) ((i) & 0xf)
#define ELF32_ST_INFO(b, i) (ELF32_ST_MKBIND(b) + ELF32_ST_TYPE(i))
#define ELF64_ST_BIND(i) ELF32_ST_BIND(i)
#define ELF64_ST_MKBIND(i) ELF32_ST_MKBIND(i)
#define ELF64_ST_TYPE(i) ELF32_ST_TYPE(i)
#define ELF64_ST_INFO(b, i) ELF32_ST_INFO(b, i)
/*
* ELF standard typedefs (yet more proof that <stdint.h> was way overdue)
*/
typedef uint16_t Elf32_Half;
typedef int16_t Elf32_SHalf;
typedef uint32_t Elf32_Word;
typedef int32_t Elf32_Sword;
typedef uint64_t Elf32_Xword;
typedef int64_t Elf32_Sxword;
typedef uint32_t Elf32_Off;
typedef uint32_t Elf32_Addr;
typedef uint16_t Elf32_Section;
typedef uint16_t Elf64_Half;
typedef int16_t Elf64_SHalf;
typedef uint32_t Elf64_Word;
typedef int32_t Elf64_Sword;
typedef uint64_t Elf64_Xword;
typedef int64_t Elf64_Sxword;
typedef uint64_t Elf64_Off;
typedef uint64_t Elf64_Addr;
typedef uint16_t Elf64_Section;
/*
* Dynamic header
*/
typedef struct elf32_dyn {
Elf32_Sword d_tag;
union {
Elf32_Sword d_val;
Elf32_Addr d_ptr;
} d_un;
} Elf32_Dyn;
typedef struct elf64_dyn {
Elf64_Sxword d_tag;
union {
Elf64_Xword d_val;
Elf64_Addr d_ptr;
} d_un;
} Elf64_Dyn;
/*
* Relocations
*/
#define ELF32_R_SYM(x) ((x) >> 8)
#define ELF32_R_TYPE(x) ((x) & 0xff)
#define ELF32_R_INFO(s,t) (((Elf32_Word)(s) << 8) + ELF32_R_TYPE(t))
typedef struct elf32_rel {
Elf32_Addr r_offset;
Elf32_Word r_info;
} Elf32_Rel;
typedef struct elf32_rela {
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
} Elf32_Rela;
enum reloc32_type {
R_386_32 = 1, /* ordinary absolute relocation */
R_386_PC32 = 2, /* PC-relative relocation */
R_386_GOT32 = 3, /* an offset into GOT */
R_386_PLT32 = 4, /* a PC-relative offset into PLT */
R_386_COPY = 5, /* ??? */
R_386_GLOB_DAT = 6, /* ??? */
R_386_JUMP_SLOT = 7, /* ??? */
R_386_RELATIVE = 8, /* ??? */
R_386_GOTOFF = 9, /* an offset from GOT base */
R_386_GOTPC = 10, /* a PC-relative offset _to_ GOT */
R_386_TLS_TPOFF = 14, /* Offset in static TLS block */
R_386_TLS_IE = 15, /* Address of GOT entry for static TLS block offset */
/* These are GNU extensions, but useful */
R_386_16 = 20, /* A 16-bit absolute relocation */
R_386_PC16 = 21, /* A 16-bit PC-relative relocation */
R_386_8 = 22, /* An 8-bit absolute relocation */
R_386_PC8 = 23 /* An 8-bit PC-relative relocation */
};
#define ELF64_R_SYM(x) ((x) >> 32)
#define ELF64_R_TYPE(x) ((x) & 0xffffffff)
#define ELF64_R_INFO(s,t) (((Elf64_Xword)(s) << 32) + ELF64_R_TYPE(t))
typedef struct elf64_rel {
Elf64_Addr r_offset;
Elf64_Xword r_info;
} Elf64_Rel;
typedef struct elf64_rela {
Elf64_Addr r_offset;
Elf64_Xword r_info;
Elf64_Sxword r_addend;
} Elf64_Rela;
enum reloc64_type {
R_X86_64_NONE = 0, /* No reloc */
R_X86_64_64 = 1, /* Direct 64 bit */
R_X86_64_PC32 = 2, /* PC relative 32 bit signed */
R_X86_64_GOT32 = 3, /* 32 bit GOT entry */
R_X86_64_PLT32 = 4, /* 32 bit PLT address */
R_X86_64_COPY = 5, /* Copy symbol at runtime */
R_X86_64_GLOB_DAT = 6, /* Create GOT entry */
R_X86_64_JUMP_SLOT = 7, /* Create PLT entry */
R_X86_64_RELATIVE = 8, /* Adjust by program base */
R_X86_64_GOTPCREL = 9, /* 32 bit signed PC relative offset to GOT */
R_X86_64_32 = 10, /* Direct 32 bit zero extended */
R_X86_64_32S = 11, /* Direct 32 bit sign extended */
R_X86_64_16 = 12, /* Direct 16 bit zero extended */
R_X86_64_PC16 = 13, /* 16 bit sign extended pc relative */
R_X86_64_8 = 14, /* Direct 8 bit sign extended */
R_X86_64_PC8 = 15, /* 8 bit sign extended pc relative */
R_X86_64_DTPMOD64 = 16, /* ID of module containing symbol */
R_X86_64_DTPOFF64 = 17, /* Offset in module's TLS block */
R_X86_64_TPOFF64 = 18, /* Offset in initial TLS block */
R_X86_64_TLSGD = 19, /* 32 bit signed PC relative offset to two GOT entries for GD symbol */
R_X86_64_TLSLD = 20, /* 32 bit signed PC relative offset to two GOT entries for LD symbol */
R_X86_64_DTPOFF32 = 21, /* Offset in TLS block */
R_X86_64_GOTTPOFF = 22, /* 32 bit signed PC relative offset to GOT entry for IE symbol */
R_X86_64_TPOFF32 = 23, /* Offset in initial TLS block */
R_X86_64_PC64 = 24, /* word64 S + A - P */
R_X86_64_GOTOFF64 = 25, /* word64 S + A - GOT */
R_X86_64_GOTPC32 = 26, /* word32 GOT + A - P */
R_X86_64_GOT64 = 27, /* word64 G + A */
R_X86_64_GOTPCREL64 = 28, /* word64 G + GOT - P + A */
R_X86_64_GOTPC64 = 29, /* word64 GOT - P + A */
R_X86_64_GOTPLT64 = 30, /* word64 G + A */
R_X86_64_PLTOFF64 = 31, /* word64 L - GOT + A */
R_X86_64_SIZE32 = 32, /* word32 Z + A */
R_X86_64_SIZE64 = 33, /* word64 Z + A */
R_X86_64_GOTPC32_TLSDESC = 34, /* word32 */
R_X86_64_TLSDESC_CALL = 35, /* none */
R_X86_64_TLSDESC = 36 /* word64?2 */
};
/*
* Symbol
*/
typedef struct elf32_sym {
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;
typedef struct elf64_sym {
Elf64_Word st_name;
unsigned char st_info;
unsigned char st_other;
Elf64_Half st_shndx;
Elf64_Addr st_value;
Elf64_Xword st_size;
} Elf64_Sym;
/*
* Main file header
*/
typedef struct elf32_hdr {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
} Elf32_Ehdr;
typedef struct elf64_hdr {
unsigned char e_ident[EI_NIDENT];
Elf64_Half e_type;
Elf64_Half e_machine;
Elf64_Word e_version;
Elf64_Addr e_entry;
Elf64_Off e_phoff;
Elf64_Off e_shoff;
Elf64_Word e_flags;
Elf64_Half e_ehsize;
Elf64_Half e_phentsize;
Elf64_Half e_phnum;
Elf64_Half e_shentsize;
Elf64_Half e_shnum;
Elf64_Half e_shstrndx;
} Elf64_Ehdr;
/*
* Program header
*/
typedef struct elf32_phdr {
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;
typedef struct elf64_phdr {
Elf64_Word p_type;
Elf64_Word p_flags;
Elf64_Off p_offset;
Elf64_Addr p_vaddr;
Elf64_Addr p_paddr;
Elf64_Xword p_filesz;
Elf64_Xword p_memsz;
Elf64_Xword p_align;
} Elf64_Phdr;
/*
* Section header
*/
typedef struct elf32_shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
} Elf32_Shdr;
typedef struct elf64_shdr {
Elf64_Word sh_name;
Elf64_Word sh_type;
Elf64_Xword sh_flags;
Elf64_Addr sh_addr;
Elf64_Off sh_offset;
Elf64_Xword sh_size;
Elf64_Word sh_link;
Elf64_Word sh_info;
Elf64_Xword sh_addralign;
Elf64_Xword sh_entsize;
} Elf64_Shdr;
/*
* Note header
*/
typedef struct elf32_note {
Elf32_Word n_namesz; /* Name size */
Elf32_Word n_descsz; /* Content size */
Elf32_Word n_type; /* Content type */
} Elf32_Nhdr;
typedef struct elf64_note {
Elf64_Word n_namesz; /* Name size */
Elf64_Word n_descsz; /* Content size */
Elf64_Word n_type; /* Content type */
} Elf64_Nhdr;
#endif /* OUTPUT_ELF_H */
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