root/src/cmd/ld/elf.h

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INCLUDED FROM


/*
 * Derived from:
 * $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.1 2005/12/30 22:13:58 marcel Exp $
 * $FreeBSD: src/sys/sys/elf64.h,v 1.10.14.1 2005/12/30 22:13:58 marcel Exp $
 * $FreeBSD: src/sys/sys/elf_common.h,v 1.15.8.1 2005/12/30 22:13:58 marcel Exp $
 * $FreeBSD: src/sys/alpha/include/elf.h,v 1.14 2003/09/25 01:10:22 peter Exp $
 * $FreeBSD: src/sys/amd64/include/elf.h,v 1.18 2004/08/03 08:21:48 dfr Exp $
 * $FreeBSD: src/sys/arm/include/elf.h,v 1.5.2.1 2006/06/30 21:42:52 cognet Exp $
 * $FreeBSD: src/sys/i386/include/elf.h,v 1.16 2004/08/02 19:12:17 dfr Exp $
 * $FreeBSD: src/sys/powerpc/include/elf.h,v 1.7 2004/11/02 09:47:01 ssouhlal Exp $
 * $FreeBSD: src/sys/sparc64/include/elf.h,v 1.12 2003/09/25 01:10:26 peter Exp $
 *
 * Copyright (c) 1996-1998 John D. Polstra.  All rights reserved.
 * Copyright (c) 2001 David E. O'Brien
 * Portions Copyright 2009 The Go Authors.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 */

/*
 * ELF definitions that are independent of architecture or word size.
 */

/*
 * Note header.  The ".note" section contains an array of notes.  Each
 * begins with this header, aligned to a word boundary.  Immediately
 * following the note header is n_namesz bytes of name, padded to the
 * next word boundary.  Then comes n_descsz bytes of descriptor, again
 * padded to a word boundary.  The values of n_namesz and n_descsz do
 * not include the padding.
 */

typedef struct {
        uint32  n_namesz;       /* Length of name. */
        uint32  n_descsz;       /* Length of descriptor. */
        uint32  n_type;         /* Type of this note. */
} Elf_Note;

/* Indexes into the e_ident array.  Keep synced with
   http://www.sco.com/developer/gabi/ch4.eheader.html */
#define EI_MAG0         0       /* Magic number, byte 0. */
#define EI_MAG1         1       /* Magic number, byte 1. */
#define EI_MAG2         2       /* Magic number, byte 2. */
#define EI_MAG3         3       /* Magic number, byte 3. */
#define EI_CLASS        4       /* Class of machine. */
#define EI_DATA         5       /* Data format. */
#define EI_VERSION      6       /* ELF format version. */
#define EI_OSABI        7       /* Operating system / ABI identification */
#define EI_ABIVERSION   8       /* ABI version */
#define OLD_EI_BRAND    8       /* Start of architecture identification. */
#define EI_PAD          9       /* Start of padding (per SVR4 ABI). */
#define EI_NIDENT       16      /* Size of e_ident array. */

/* Values for the magic number bytes. */
#define ELFMAG0         0x7f
#define ELFMAG1         'E'
#define ELFMAG2         'L'
#define ELFMAG3         'F'
#define ELFMAG          "\177ELF"       /* magic string */
#define SELFMAG         4               /* magic string size */

/* Values for e_ident[EI_VERSION] and e_version. */
#define EV_NONE         0
#define EV_CURRENT      1

/* Values for e_ident[EI_CLASS]. */
#define ELFCLASSNONE    0       /* Unknown class. */
#define ELFCLASS32      1       /* 32-bit architecture. */
#define ELFCLASS64      2       /* 64-bit architecture. */

/* Values for e_ident[EI_DATA]. */
#define ELFDATANONE     0       /* Unknown data format. */
#define ELFDATA2LSB     1       /* 2's complement little-endian. */
#define ELFDATA2MSB     2       /* 2's complement big-endian. */

/* Values for e_ident[EI_OSABI]. */
#define ELFOSABI_NONE           0       /* UNIX System V ABI */
#define ELFOSABI_HPUX           1       /* HP-UX operating system */
#define ELFOSABI_NETBSD         2       /* NetBSD */
#define ELFOSABI_LINUX          3       /* GNU/Linux */
#define ELFOSABI_HURD           4       /* GNU/Hurd */
#define ELFOSABI_86OPEN         5       /* 86Open common IA32 ABI */
#define ELFOSABI_SOLARIS        6       /* Solaris */
#define ELFOSABI_AIX            7       /* AIX */
#define ELFOSABI_IRIX           8       /* IRIX */
#define ELFOSABI_FREEBSD        9       /* FreeBSD */
#define ELFOSABI_TRU64          10      /* TRU64 UNIX */
#define ELFOSABI_MODESTO        11      /* Novell Modesto */
#define ELFOSABI_OPENBSD        12      /* OpenBSD */
#define ELFOSABI_OPENVMS        13      /* Open VMS */
#define ELFOSABI_NSK            14      /* HP Non-Stop Kernel */
#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 && \
                         (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
                         (ehdr).e_ident[EI_MAG3] == ELFMAG3)

/* Values for e_type. */
#define ET_NONE         0       /* Unknown type. */
#define ET_REL          1       /* Relocatable. */
#define ET_EXEC         2       /* Executable. */
#define ET_DYN          3       /* Shared object. */
#define ET_CORE         4       /* Core file. */
#define ET_LOOS         0xfe00  /* First operating system specific. */
#define ET_HIOS         0xfeff  /* Last operating system-specific. */
#define ET_LOPROC       0xff00  /* First processor-specific. */
#define ET_HIPROC       0xffff  /* Last processor-specific. */

/* Values for e_machine. */
#define EM_NONE         0       /* Unknown machine. */
#define EM_M32          1       /* AT&T WE32100. */
#define EM_SPARC        2       /* Sun SPARC. */
#define EM_386          3       /* Intel i386. */
#define EM_68K          4       /* Motorola 68000. */
#define EM_88K          5       /* Motorola 88000. */
#define EM_860          7       /* Intel i860. */
#define EM_MIPS         8       /* MIPS R3000 Big-Endian only. */
#define EM_S370         9       /* IBM System/370. */
#define EM_MIPS_RS3_LE  10      /* MIPS R3000 Little-Endian. */
#define EM_PARISC       15      /* HP PA-RISC. */
#define EM_VPP500       17      /* Fujitsu VPP500. */
#define EM_SPARC32PLUS  18      /* SPARC v8plus. */
#define EM_960          19      /* Intel 80960. */
#define EM_PPC          20      /* PowerPC 32-bit. */
#define EM_PPC64        21      /* PowerPC 64-bit. */
#define EM_S390         22      /* IBM System/390. */
#define EM_V800         36      /* NEC V800. */
#define EM_FR20         37      /* Fujitsu FR20. */
#define EM_RH32         38      /* TRW RH-32. */
#define EM_RCE          39      /* Motorola RCE. */
#define EM_ARM          40      /* ARM. */
#define EM_SH           42      /* Hitachi SH. */
#define EM_SPARCV9      43      /* SPARC v9 64-bit. */
#define EM_TRICORE      44      /* Siemens TriCore embedded processor. */
#define EM_ARC          45      /* Argonaut RISC Core. */
#define EM_H8_300       46      /* Hitachi H8/300. */
#define EM_H8_300H      47      /* Hitachi H8/300H. */
#define EM_H8S          48      /* Hitachi H8S. */
#define EM_H8_500       49      /* Hitachi H8/500. */
#define EM_IA_64        50      /* Intel IA-64 Processor. */
#define EM_MIPS_X       51      /* Stanford MIPS-X. */
#define EM_COLDFIRE     52      /* Motorola ColdFire. */
#define EM_68HC12       53      /* Motorola M68HC12. */
#define EM_MMA          54      /* Fujitsu MMA. */
#define EM_PCP          55      /* Siemens PCP. */
#define EM_NCPU         56      /* Sony nCPU. */
#define EM_NDR1         57      /* Denso NDR1 microprocessor. */
#define EM_STARCORE     58      /* Motorola Star*Core processor. */
#define EM_ME16         59      /* Toyota ME16 processor. */
#define EM_ST100        60      /* STMicroelectronics ST100 processor. */
#define EM_TINYJ        61      /* Advanced Logic Corp. TinyJ processor. */
#define EM_X86_64       62      /* Advanced Micro Devices x86-64 */

/* Non-standard or deprecated. */
#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. */
#define SHN_LORESERVE   0xff00          /* First of reserved range. */
#define SHN_LOPROC      0xff00          /* First processor-specific. */
#define SHN_HIPROC      0xff1f          /* Last processor-specific. */
#define SHN_LOOS        0xff20          /* First operating system-specific. */
#define SHN_HIOS        0xff3f          /* Last operating system-specific. */
#define SHN_ABS         0xfff1          /* Absolute values. */
#define SHN_COMMON      0xfff2          /* Common data. */
#define SHN_XINDEX      0xffff          /* Escape -- index stored elsewhere. */
#define SHN_HIRESERVE   0xffff          /* Last of reserved range. */

/* 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       /* relocation section - no addends */
#define SHT_SHLIB               10      /* reserved - purpose unknown */
#define SHT_DYNSYM              11      /* dynamic symbol table section */
#define SHT_INIT_ARRAY          14      /* Initialization function pointers. */
#define SHT_FINI_ARRAY          15      /* Termination function pointers. */
#define SHT_PREINIT_ARRAY       16      /* Pre-initialization function ptrs. */
#define SHT_GROUP               17      /* Section group. */
#define SHT_SYMTAB_SHNDX        18      /* Section indexes (see SHN_XINDEX). */
#define SHT_LOOS        0x60000000      /* First of OS specific semantics */
#define SHT_HIOS        0x6fffffff      /* Last of OS specific semantics */
#define SHT_GNU_VERDEF  0x6ffffffd
#define SHT_GNU_VERNEED 0x6ffffffe
#define SHT_GNU_VERSYM  0x6fffffff
#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 */

/* Flags for sh_flags. */
#define SHF_WRITE               0x1     /* Section contains writable data. */
#define SHF_ALLOC               0x2     /* Section occupies memory. */
#define SHF_EXECINSTR           0x4     /* Section contains instructions. */
#define SHF_MERGE               0x10    /* Section may be merged. */
#define SHF_STRINGS             0x20    /* Section contains strings. */
#define SHF_INFO_LINK           0x40    /* sh_info holds section index. */
#define SHF_LINK_ORDER          0x80    /* Special ordering requirements. */
#define SHF_OS_NONCONFORMING    0x100   /* OS-specific processing required. */
#define SHF_GROUP               0x200   /* Member of section group. */
#define SHF_TLS                 0x400   /* Section contains TLS data. */
#define SHF_MASKOS      0x0ff00000      /* OS-specific semantics. */
#define SHF_MASKPROC    0xf0000000      /* Processor-specific semantics. */

/* Values for p_type. */
#define PT_NULL         0       /* Unused entry. */
#define PT_LOAD         1       /* Loadable segment. */
#define PT_DYNAMIC      2       /* Dynamic linking information segment. */
#define PT_INTERP       3       /* Pathname of interpreter. */
#define PT_NOTE         4       /* Auxiliary information. */
#define PT_SHLIB        5       /* Reserved (not used). */
#define PT_PHDR         6       /* Location of program header itself. */
#define PT_TLS          7       /* Thread local storage segment */
#define PT_LOOS         0x60000000      /* First OS-specific. */
#define PT_HIOS         0x6fffffff      /* Last OS-specific. */
#define PT_LOPROC       0x70000000      /* First processor-specific type. */
#define PT_HIPROC       0x7fffffff      /* Last processor-specific type. */
#define PT_GNU_STACK    0x6474e551
#define PT_PAX_FLAGS    0x65041580

/* Values for p_flags. */
#define PF_X            0x1             /* Executable. */
#define PF_W            0x2             /* Writable. */
#define PF_R            0x4             /* Readable. */
#define PF_MASKOS       0x0ff00000      /* Operating system-specific. */
#define PF_MASKPROC     0xf0000000      /* Processor-specific. */

/* Values for d_tag. */
#define DT_NULL         0       /* Terminating entry. */
/* String table offset of a needed shared library. */
#define DT_NEEDED       1
#define DT_PLTRELSZ     2       /* Total size in bytes of PLT relocations. */
#define DT_PLTGOT       3       /* Processor-dependent address. */
#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 ElfNN_Rela relocations. */
#define DT_RELASZ       8       /* Total size of ElfNN_Rela relocations. */
#define DT_RELAENT      9       /* Size of each ElfNN_Rela relocation entry. */
#define DT_STRSZ        10      /* Size of string table. */
#define DT_SYMENT       11      /* Size of each symbol table entry. */
#define DT_INIT         12      /* Address of initialization function. */
#define DT_FINI         13      /* Address of finalization function. */
/* String table offset of shared object name. */
#define DT_SONAME       14
#define DT_RPATH        15      /* String table offset of library path. [sup] */
#define DT_SYMBOLIC     16      /* Indicates "symbolic" linking. [sup] */
#define DT_REL          17      /* Address of ElfNN_Rel relocations. */
#define DT_RELSZ        18      /* Total size of ElfNN_Rel relocations. */
#define DT_RELENT       19      /* Size of each ElfNN_Rel relocation. */
#define DT_PLTREL       20      /* Type of relocation used for PLT. */
#define DT_DEBUG        21      /* Reserved (not used). */
/* Indicates there may be relocations in non-writable segments. [sup] */
#define DT_TEXTREL      22
#define DT_JMPREL       23      /* Address of PLT relocations. */
#define DT_BIND_NOW     24      /* [sup] */
/* Address of the array of pointers to initialization functions */
#define DT_INIT_ARRAY   25
/* Address of the array of pointers to termination functions */
#define DT_FINI_ARRAY   26
/* Size in bytes of the array of initialization functions. */
#define DT_INIT_ARRAYSZ 27
/* Size in bytes of the array of terminationfunctions. */
#define DT_FINI_ARRAYSZ 28
/* String table offset of a null-terminated library search path string. */
#define DT_RUNPATH      29
#define DT_FLAGS        30      /* Object specific flag values. */
/*      Values greater than or equal to DT_ENCODING and less than
        DT_LOOS follow the rules for the interpretation of the d_un
        union as follows: even == 'd_ptr', even == 'd_val' or none */
#define DT_ENCODING     32
/* Address of the array of pointers to pre-initialization functions. */
#define DT_PREINIT_ARRAY 32
/* Size in bytes of the array of pre-initialization functions. */
#define DT_PREINIT_ARRAYSZ 33
#define DT_LOOS         0x6000000d      /* First OS-specific */
#define DT_HIOS         0x6ffff000      /* Last OS-specific */
#define DT_LOPROC       0x70000000      /* First processor-specific type. */
#define DT_HIPROC       0x7fffffff      /* Last processor-specific type. */

#define DT_VERNEED      0x6ffffffe
#define DT_VERNEEDNUM   0x6fffffff
#define DT_VERSYM       0x6ffffff0

/* Values for DT_FLAGS */
/*      Indicates that the object being loaded may make reference to
        the $ORIGIN substitution string */
#define DF_ORIGIN       0x0001
#define DF_SYMBOLIC     0x0002  /* Indicates "symbolic" linking. */
/* Indicates there may be relocations in non-writable segments. */
#define DF_TEXTREL      0x0004
/*      Indicates that the dynamic linker should process all
        relocations for the object containing this entry before
        transferring control to the program.  */
#define DF_BIND_NOW     0x0008
/*      Indicates that the shared object or executable contains code
        using a static thread-local storage scheme.  */
#define DF_STATIC_TLS   0x0010

/* Values for n_type.  Used in core files. */
#define NT_PRSTATUS     1       /* Process status. */
#define NT_FPREGSET     2       /* Floating point registers. */
#define NT_PRPSINFO     3       /* Process state info. */

/* Symbol Binding - ELFNN_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_LOOS        10      /* Reserved range for operating system */
#define STB_HIOS        12      /*   specific semantics. */
#define STB_LOPROC      13      /* reserved range for processor */
#define STB_HIPROC      15      /*   specific semantics. */

/* Symbol type - ELFNN_ST_TYPE - st_info */
#define STT_NOTYPE      0       /* Unspecified type. */
#define STT_OBJECT      1       /* Data object. */
#define STT_FUNC        2       /* Function. */
#define STT_SECTION     3       /* Section. */
#define STT_FILE        4       /* Source file. */
#define STT_COMMON      5       /* Uninitialized common block. */
#define STT_TLS         6       /* TLS object. */
#define STT_LOOS        10      /* Reserved range for operating system */
#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). */
#define STV_INTERNAL    0x1     /* Special meaning in relocatable objects. */
#define STV_HIDDEN      0x2     /* Not visible. */
#define STV_PROTECTED   0x3     /* Visible but not preemptible. */

/* Special symbol table indexes. */
#define STN_UNDEF       0       /* Undefined symbol index. */

/*
 * ELF definitions common to all 32-bit architectures.
 */

typedef uint32  Elf32_Addr;
typedef uint16  Elf32_Half;
typedef uint32  Elf32_Off;
typedef int32           Elf32_Sword;
typedef uint32  Elf32_Word;

typedef Elf32_Word      Elf32_Hashelt;

/* Non-standard class-dependent datatype used for abstraction. */
typedef Elf32_Word      Elf32_Size;
typedef Elf32_Sword     Elf32_Ssize;

/*
 * ELF header.
 */

typedef struct {
        unsigned char   ident[EI_NIDENT];       /* File identification. */
        Elf32_Half      type;           /* File type. */
        Elf32_Half      machine;        /* Machine architecture. */
        Elf32_Word      version;        /* ELF format version. */
        Elf32_Addr      entry;  /* Entry point. */
        Elf32_Off       phoff;  /* Program header file offset. */
        Elf32_Off       shoff;  /* Section header file offset. */
        Elf32_Word      flags;  /* Architecture-specific flags. */
        Elf32_Half      ehsize; /* Size of ELF header in bytes. */
        Elf32_Half      phentsize;      /* Size of program header entry. */
        Elf32_Half      phnum;  /* Number of program header entries. */
        Elf32_Half      shentsize;      /* Size of section header entry. */
        Elf32_Half      shnum;  /* Number of section header entries. */
        Elf32_Half      shstrndx;       /* Section name strings section. */
} Elf32_Ehdr;

/*
 * Section header.
 */

typedef struct {
        Elf32_Word      name;   /* Section name (index into the
                                           section header string table). */
        Elf32_Word      type;   /* Section type. */
        Elf32_Word      flags;  /* Section flags. */
        Elf32_Addr      vaddr;  /* Address in memory image. */
        Elf32_Off       off;    /* Offset in file. */
        Elf32_Word      size;   /* Size in bytes. */
        Elf32_Word      link;   /* Index of a related section. */
        Elf32_Word      info;   /* Depends on section type. */
        Elf32_Word      addralign;      /* Alignment in bytes. */
        Elf32_Word      entsize;        /* Size of each entry in section. */
} Elf32_Shdr;

/*
 * Program header.
 */

typedef struct {
        Elf32_Word      type;           /* Entry type. */
        Elf32_Off       off;    /* File offset of contents. */
        Elf32_Addr      vaddr;  /* Virtual address in memory image. */
        Elf32_Addr      paddr;  /* Physical address (not used). */
        Elf32_Word      filesz; /* Size of contents in file. */
        Elf32_Word      memsz;  /* Size of contents in memory. */
        Elf32_Word      flags;  /* Access permission flags. */
        Elf32_Word      align;  /* Alignment in memory and file. */
} Elf32_Phdr;

/*
 * Dynamic structure.  The ".dynamic" section contains an array of them.
 */

typedef struct {
        Elf32_Sword     d_tag;          /* Entry type. */
        union {
                Elf32_Word      d_val;  /* Integer value. */
                Elf32_Addr      d_ptr;  /* Address value. */
        } d_un;
} Elf32_Dyn;

/*
 * Relocation entries.
 */

/* Relocations that don't need an addend field. */
typedef struct {
        Elf32_Addr      off;    /* Location to be relocated. */
        Elf32_Word      info;           /* Relocation type and symbol index. */
} Elf32_Rel;

/* Relocations that need an addend field. */
typedef struct {
        Elf32_Addr      off;    /* Location to be relocated. */
        Elf32_Word      info;           /* Relocation type and symbol index. */
        Elf32_Sword     addend; /* Addend. */
} Elf32_Rela;

/* Macros for accessing the fields of r_info. */
#define ELF32_R_SYM(info)       ((info) >> 8)
#define ELF32_R_TYPE(info)      ((unsigned char)(info))

/* Macro for constructing r_info from field values. */
#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))

/*
 * Relocation types.
 */

#define R_X86_64_NONE   0       /* No relocation. */
#define R_X86_64_64     1       /* Add 64 bit symbol value. */
#define R_X86_64_PC32   2       /* PC-relative 32 bit signed sym value. */
#define R_X86_64_GOT32  3       /* PC-relative 32 bit GOT offset. */
#define R_X86_64_PLT32  4       /* PC-relative 32 bit PLT offset. */
#define R_X86_64_COPY   5       /* Copy data from shared object. */
#define R_X86_64_GLOB_DAT 6     /* Set GOT entry to data address. */
#define R_X86_64_JMP_SLOT 7     /* Set GOT entry to code address. */
#define R_X86_64_RELATIVE 8     /* Add load address of shared object. */
#define R_X86_64_GOTPCREL 9     /* Add 32 bit signed pcrel offset to GOT. */
#define R_X86_64_32     10      /* Add 32 bit zero extended symbol value */
#define R_X86_64_32S    11      /* Add 32 bit sign extended symbol value */
#define R_X86_64_16     12      /* Add 16 bit zero extended symbol value */
#define R_X86_64_PC16   13      /* Add 16 bit signed extended pc relative symbol value */
#define R_X86_64_8      14      /* Add 8 bit zero extended symbol value */
#define R_X86_64_PC8    15      /* Add 8 bit signed extended pc relative symbol value */
#define R_X86_64_DTPMOD64 16    /* ID of module containing symbol */
#define R_X86_64_DTPOFF64 17    /* Offset in TLS block */
#define R_X86_64_TPOFF64 18     /* Offset in static TLS block */
#define R_X86_64_TLSGD  19      /* PC relative offset to GD GOT entry */
#define R_X86_64_TLSLD  20      /* PC relative offset to LD GOT entry */
#define R_X86_64_DTPOFF32 21    /* Offset in TLS block */
#define R_X86_64_GOTTPOFF 22    /* PC relative offset to IE GOT entry */
#define R_X86_64_TPOFF32 23     /* Offset in static TLS block */

#define R_X86_64_COUNT  24      /* Count of defined relocation types. */


#define R_ALPHA_NONE            0       /* No reloc */
#define R_ALPHA_REFLONG         1       /* Direct 32 bit */
#define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
#define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
#define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
#define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
#define R_ALPHA_GPDISP          6       /* Add displacement to GP */
#define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
#define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
#define R_ALPHA_SREL16          9       /* PC relative 16 bit */
#define R_ALPHA_SREL32          10      /* PC relative 32 bit */
#define R_ALPHA_SREL64          11      /* PC relative 64 bit */
#define R_ALPHA_OP_PUSH         12      /* OP stack push */
#define R_ALPHA_OP_STORE        13      /* OP stack pop and store */
#define R_ALPHA_OP_PSUB         14      /* OP stack subtract */
#define R_ALPHA_OP_PRSHIFT      15      /* OP stack right shift */
#define R_ALPHA_GPVALUE         16
#define R_ALPHA_GPRELHIGH       17
#define R_ALPHA_GPRELLOW        18
#define R_ALPHA_IMMED_GP_16     19
#define R_ALPHA_IMMED_GP_HI32   20
#define R_ALPHA_IMMED_SCN_HI32  21
#define R_ALPHA_IMMED_BR_HI32   22
#define R_ALPHA_IMMED_LO32      23
#define R_ALPHA_COPY            24      /* Copy symbol at runtime */
#define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
#define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
#define R_ALPHA_RELATIVE        27      /* Adjust by program base */

#define R_ALPHA_COUNT           28


#define R_ARM_NONE              0       /* No relocation. */
#define R_ARM_PC24              1
#define R_ARM_ABS32             2
#define R_ARM_REL32             3
#define R_ARM_PC13              4
#define R_ARM_ABS16             5
#define R_ARM_ABS12             6
#define R_ARM_THM_ABS5          7
#define R_ARM_ABS8              8
#define R_ARM_SBREL32           9
#define R_ARM_THM_PC22          10
#define R_ARM_THM_PC8           11
#define R_ARM_AMP_VCALL9        12
#define R_ARM_SWI24             13
#define R_ARM_THM_SWI8          14
#define R_ARM_XPC25             15
#define R_ARM_THM_XPC22         16
#define R_ARM_COPY              20      /* Copy data from shared object. */
#define R_ARM_GLOB_DAT          21      /* Set GOT entry to data address. */
#define R_ARM_JUMP_SLOT         22      /* Set GOT entry to code address. */
#define R_ARM_RELATIVE          23      /* Add load address of shared object. */
#define R_ARM_GOTOFF            24      /* Add GOT-relative symbol address. */
#define R_ARM_GOTPC             25      /* Add PC-relative GOT table address. */
#define R_ARM_GOT32             26      /* Add PC-relative GOT offset. */
#define R_ARM_PLT32             27      /* Add PC-relative PLT offset. */
#define R_ARM_CALL              28
#define R_ARM_JUMP24    29
#define R_ARM_V4BX              40
#define R_ARM_GOT_PREL          96
#define R_ARM_GNU_VTENTRY       100
#define R_ARM_GNU_VTINHERIT     101
#define R_ARM_TLS_IE32          107
#define R_ARM_TLS_LE32          108
#define R_ARM_RSBREL32          250
#define R_ARM_THM_RPC22         251
#define R_ARM_RREL32            252
#define R_ARM_RABS32            253
#define R_ARM_RPC24             254
#define R_ARM_RBASE             255

#define R_ARM_COUNT             38      /* Count of defined relocation types. */


#define R_386_NONE      0       /* No relocation. */
#define R_386_32        1       /* Add symbol value. */
#define R_386_PC32      2       /* Add PC-relative symbol value. */
#define R_386_GOT32     3       /* Add PC-relative GOT offset. */
#define R_386_PLT32     4       /* Add PC-relative PLT offset. */
#define R_386_COPY      5       /* Copy data from shared object. */
#define R_386_GLOB_DAT  6       /* Set GOT entry to data address. */
#define R_386_JMP_SLOT  7       /* Set GOT entry to code address. */
#define R_386_RELATIVE  8       /* Add load address of shared object. */
#define R_386_GOTOFF    9       /* Add GOT-relative symbol address. */
#define R_386_GOTPC     10      /* Add PC-relative GOT table address. */
#define R_386_TLS_TPOFF 14      /* Negative offset in static TLS block */
#define R_386_TLS_IE    15      /* Absolute address of GOT for -ve static TLS */
#define R_386_TLS_GOTIE 16      /* GOT entry for negative static TLS block */
#define R_386_TLS_LE    17      /* Negative offset relative to static TLS */
#define R_386_TLS_GD    18      /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_LDM   19      /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_GD_32 24      /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_GD_PUSH 25    /* pushl instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_CALL 26    /* call instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_POP 27     /* popl instruction for Sun ABI GD sequence */
#define R_386_TLS_LDM_32 28     /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_LDM_PUSH 29   /* pushl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_CALL 30   /* call instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_POP 31    /* popl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDO_32 32     /* 32 bit offset from start of TLS block */
#define R_386_TLS_IE_32 33      /* 32 bit offset to GOT static TLS offset entry */
#define R_386_TLS_LE_32 34      /* 32 bit offset within static TLS block */
#define R_386_TLS_DTPMOD32 35   /* GOT entry containing TLS index */
#define R_386_TLS_DTPOFF32 36   /* GOT entry containing TLS offset */
#define R_386_TLS_TPOFF32 37    /* GOT entry of -ve static TLS offset */

#define R_386_COUNT     38      /* Count of defined relocation types. */

#define R_PPC_NONE              0       /* No relocation. */
#define R_PPC_ADDR32            1
#define R_PPC_ADDR24            2
#define R_PPC_ADDR16            3
#define R_PPC_ADDR16_LO         4
#define R_PPC_ADDR16_HI         5
#define R_PPC_ADDR16_HA         6
#define R_PPC_ADDR14            7
#define R_PPC_ADDR14_BRTAKEN    8
#define R_PPC_ADDR14_BRNTAKEN   9
#define R_PPC_REL24             10
#define R_PPC_REL14             11
#define R_PPC_REL14_BRTAKEN     12
#define R_PPC_REL14_BRNTAKEN    13
#define R_PPC_GOT16             14
#define R_PPC_GOT16_LO          15
#define R_PPC_GOT16_HI          16
#define R_PPC_GOT16_HA          17
#define R_PPC_PLTREL24          18
#define R_PPC_COPY              19
#define R_PPC_GLOB_DAT          20
#define R_PPC_JMP_SLOT          21
#define R_PPC_RELATIVE          22
#define R_PPC_LOCAL24PC         23
#define R_PPC_UADDR32           24
#define R_PPC_UADDR16           25
#define R_PPC_REL32             26
#define R_PPC_PLT32             27
#define R_PPC_PLTREL32          28
#define R_PPC_PLT16_LO          29
#define R_PPC_PLT16_HI          30
#define R_PPC_PLT16_HA          31
#define R_PPC_SDAREL16          32
#define R_PPC_SECTOFF           33
#define R_PPC_SECTOFF_LO        34
#define R_PPC_SECTOFF_HI        35
#define R_PPC_SECTOFF_HA        36

#define R_PPC_COUNT             37      /* Count of defined relocation types. */

#define R_PPC_TLS               67
#define R_PPC_DTPMOD32          68
#define R_PPC_TPREL16           69
#define R_PPC_TPREL16_LO        70
#define R_PPC_TPREL16_HI        71
#define R_PPC_TPREL16_HA        72
#define R_PPC_TPREL32           73
#define R_PPC_DTPREL16          74
#define R_PPC_DTPREL16_LO       75
#define R_PPC_DTPREL16_HI       76
#define R_PPC_DTPREL16_HA       77
#define R_PPC_DTPREL32          78
#define R_PPC_GOT_TLSGD16       79
#define R_PPC_GOT_TLSGD16_LO    80
#define R_PPC_GOT_TLSGD16_HI    81
#define R_PPC_GOT_TLSGD16_HA    82
#define R_PPC_GOT_TLSLD16       83
#define R_PPC_GOT_TLSLD16_LO    84
#define R_PPC_GOT_TLSLD16_HI    85
#define R_PPC_GOT_TLSLD16_HA    86
#define R_PPC_GOT_TPREL16       87
#define R_PPC_GOT_TPREL16_LO    88
#define R_PPC_GOT_TPREL16_HI    89
#define R_PPC_GOT_TPREL16_HA    90

#define R_PPC_EMB_NADDR32       101
#define R_PPC_EMB_NADDR16       102
#define R_PPC_EMB_NADDR16_LO    103
#define R_PPC_EMB_NADDR16_HI    104
#define R_PPC_EMB_NADDR16_HA    105
#define R_PPC_EMB_SDAI16        106
#define R_PPC_EMB_SDA2I16       107
#define R_PPC_EMB_SDA2REL       108
#define R_PPC_EMB_SDA21         109
#define R_PPC_EMB_MRKREF        110
#define R_PPC_EMB_RELSEC16      111
#define R_PPC_EMB_RELST_LO      112
#define R_PPC_EMB_RELST_HI      113
#define R_PPC_EMB_RELST_HA      114
#define R_PPC_EMB_BIT_FLD       115
#define R_PPC_EMB_RELSDA        116

                                        /* Count of defined relocation types. */
#define R_PPC_EMB_COUNT         (R_PPC_EMB_RELSDA - R_PPC_EMB_NADDR32 + 1)


#define R_SPARC_NONE            0
#define R_SPARC_8               1
#define R_SPARC_16              2
#define R_SPARC_32              3
#define R_SPARC_DISP8           4
#define R_SPARC_DISP16          5
#define R_SPARC_DISP32          6
#define R_SPARC_WDISP30         7
#define R_SPARC_WDISP22         8
#define R_SPARC_HI22            9
#define R_SPARC_22              10
#define R_SPARC_13              11
#define R_SPARC_LO10            12
#define R_SPARC_GOT10           13
#define R_SPARC_GOT13           14
#define R_SPARC_GOT22           15
#define R_SPARC_PC10            16
#define R_SPARC_PC22            17
#define R_SPARC_WPLT30          18
#define R_SPARC_COPY            19
#define R_SPARC_GLOB_DAT        20
#define R_SPARC_JMP_SLOT        21
#define R_SPARC_RELATIVE        22
#define R_SPARC_UA32            23
#define R_SPARC_PLT32           24
#define R_SPARC_HIPLT22         25
#define R_SPARC_LOPLT10         26
#define R_SPARC_PCPLT32         27
#define R_SPARC_PCPLT22         28
#define R_SPARC_PCPLT10         29
#define R_SPARC_10              30
#define R_SPARC_11              31
#define R_SPARC_64              32
#define R_SPARC_OLO10           33
#define R_SPARC_HH22            34
#define R_SPARC_HM10            35
#define R_SPARC_LM22            36
#define R_SPARC_PC_HH22         37
#define R_SPARC_PC_HM10         38
#define R_SPARC_PC_LM22         39
#define R_SPARC_WDISP16         40
#define R_SPARC_WDISP19         41
#define R_SPARC_GLOB_JMP        42
#define R_SPARC_7               43
#define R_SPARC_5               44
#define R_SPARC_6               45
#define R_SPARC_DISP64          46
#define R_SPARC_PLT64           47
#define R_SPARC_HIX22           48
#define R_SPARC_LOX10           49
#define R_SPARC_H44             50
#define R_SPARC_M44             51
#define R_SPARC_L44             52
#define R_SPARC_REGISTER        53
#define R_SPARC_UA64            54
#define R_SPARC_UA16            55


/*
 * Magic number for the elf trampoline, chosen wisely to be an immediate
 * value.
 */
#define ARM_MAGIC_TRAMP_NUMBER  0x5c000003


/*
 * Symbol table entries.
 */

typedef struct {
        Elf32_Word      name;   /* String table index of name. */
        Elf32_Addr      value;  /* Symbol value. */
        Elf32_Word      size;   /* Size of associated object. */
        unsigned char   info;   /* Type and binding information. */
        unsigned char   other;  /* Reserved (not used). */
        Elf32_Half      shndx;  /* Section index of symbol. */
} Elf32_Sym;

/* Macros for accessing the fields of st_info. */
#define ELF32_ST_BIND(info)             ((info) >> 4)
#define ELF32_ST_TYPE(info)             ((info) & 0xf)

/* Macro for constructing st_info from field values. */
#define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))

/* Macro for accessing the fields of st_other. */
#define ELF32_ST_VISIBILITY(oth)        ((oth) & 0x3)

/*
 * ELF definitions common to all 64-bit architectures.
 */

typedef uint64  Elf64_Addr;
typedef uint16  Elf64_Half;
typedef uint64  Elf64_Off;
typedef int32           Elf64_Sword;
typedef int64           Elf64_Sxword;
typedef uint32  Elf64_Word;
typedef uint64  Elf64_Xword;

/*
 * Types of dynamic symbol hash table bucket and chain elements.
 *
 * This is inconsistent among 64 bit architectures, so a machine dependent
 * typedef is required.
 */

#ifdef __alpha__
typedef Elf64_Off       Elf64_Hashelt;
#else
typedef Elf64_Word      Elf64_Hashelt;
#endif

/* Non-standard class-dependent datatype used for abstraction. */
typedef Elf64_Xword     Elf64_Size;
typedef Elf64_Sxword    Elf64_Ssize;

/*
 * ELF header.
 */

typedef struct {
        unsigned char   ident[EI_NIDENT];       /* File identification. */
        Elf64_Half      type;           /* File type. */
        Elf64_Half      machine;        /* Machine architecture. */
        Elf64_Word      version;        /* ELF format version. */
        Elf64_Addr      entry;  /* Entry point. */
        Elf64_Off       phoff;  /* Program header file offset. */
        Elf64_Off       shoff;  /* Section header file offset. */
        Elf64_Word      flags;  /* Architecture-specific flags. */
        Elf64_Half      ehsize; /* Size of ELF header in bytes. */
        Elf64_Half      phentsize;      /* Size of program header entry. */
        Elf64_Half      phnum;  /* Number of program header entries. */
        Elf64_Half      shentsize;      /* Size of section header entry. */
        Elf64_Half      shnum;  /* Number of section header entries. */
        Elf64_Half      shstrndx;       /* Section name strings section. */
} Elf64_Ehdr;

/*
 * Section header.
 */

typedef struct Elf64_Shdr Elf64_Shdr;
struct Elf64_Shdr {
        Elf64_Word      name;   /* Section name (index into the
                                           section header string table). */
        Elf64_Word      type;   /* Section type. */
        Elf64_Xword     flags;  /* Section flags. */
        Elf64_Addr      addr;   /* Address in memory image. */
        Elf64_Off       off;    /* Offset in file. */
        Elf64_Xword     size;   /* Size in bytes. */
        Elf64_Word      link;   /* Index of a related section. */
        Elf64_Word      info;   /* Depends on section type. */
        Elf64_Xword     addralign;      /* Alignment in bytes. */
        Elf64_Xword     entsize;        /* Size of each entry in section. */
        
        int     shnum;  /* section number, not stored on disk */
        LSym*   secsym; /* section symbol, if needed; not on disk */
};

/*
 * Program header.
 */

typedef struct {
        Elf64_Word      type;           /* Entry type. */
        Elf64_Word      flags;  /* Access permission flags. */
        Elf64_Off       off;    /* File offset of contents. */
        Elf64_Addr      vaddr;  /* Virtual address in memory image. */
        Elf64_Addr      paddr;  /* Physical address (not used). */
        Elf64_Xword     filesz; /* Size of contents in file. */
        Elf64_Xword     memsz;  /* Size of contents in memory. */
        Elf64_Xword     align;  /* Alignment in memory and file. */
} Elf64_Phdr;

/*
 * Dynamic structure.  The ".dynamic" section contains an array of them.
 */

typedef struct {
        Elf64_Sxword    d_tag;          /* Entry type. */
        union {
                Elf64_Xword     d_val;  /* Integer value. */
                Elf64_Addr      d_ptr;  /* Address value. */
        } d_un;
} Elf64_Dyn;

/*
 * Relocation entries.
 */

/* Relocations that don't need an addend field. */
typedef struct {
        Elf64_Addr      off;    /* Location to be relocated. */
        Elf64_Xword     info;           /* Relocation type and symbol index. */
} Elf64_Rel;

/* Relocations that need an addend field. */
typedef struct {
        Elf64_Addr      off;    /* Location to be relocated. */
        Elf64_Xword     info;           /* Relocation type and symbol index. */
        Elf64_Sxword    addend; /* Addend. */
} Elf64_Rela;

/* Macros for accessing the fields of r_info. */
#define ELF64_R_SYM(info)       ((info) >> 32)
#define ELF64_R_TYPE(info)      ((info) & 0xffffffffL)

/* Macro for constructing r_info from field values. */
#define ELF64_R_INFO(sym, type) ((((uint64)(sym)) << 32) + (((uint64)(type)) & 0xffffffffULL))

/*
 * Symbol table entries.
 */

typedef struct {
        Elf64_Word      name;   /* String table index of name. */
        unsigned char   info;   /* Type and binding information. */
        unsigned char   other;  /* Reserved (not used). */
        Elf64_Half      shndx;  /* Section index of symbol. */
        Elf64_Addr      value;  /* Symbol value. */
        Elf64_Xword     size;   /* Size of associated object. */
} Elf64_Sym;

/* Macros for accessing the fields of st_info. */
#define ELF64_ST_BIND(info)             ((info) >> 4)
#define ELF64_ST_TYPE(info)             ((info) & 0xf)

/* Macro for constructing st_info from field values. */
#define ELF64_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))

/* Macro for accessing the fields of st_other. */
#define ELF64_ST_VISIBILITY(oth)        ((oth) & 0x3)

/*
 * Go linker interface
 */

#define ELF64HDRSIZE    64
#define ELF64PHDRSIZE   56
#define ELF64SHDRSIZE   64
#define ELF64RELSIZE    16
#define ELF64RELASIZE   24
#define ELF64SYMSIZE    sizeof(Elf64_Sym)

#define ELF32HDRSIZE    sizeof(Elf32_Ehdr)
#define ELF32PHDRSIZE   sizeof(Elf32_Phdr)
#define ELF32SHDRSIZE   sizeof(Elf32_Shdr)
#define ELF32SYMSIZE    sizeof(Elf32_Sym)
#define ELF32RELSIZE    8

/*
 * The interface uses the 64-bit structures always,
 * to avoid code duplication.  The writers know how to
 * marshal a 32-bit representation from the 64-bit structure.
 */
typedef Elf64_Ehdr ElfEhdr;
typedef Elf64_Shdr ElfShdr;
typedef Elf64_Phdr ElfPhdr;

void    elfinit(void);
ElfEhdr *getElfEhdr(void);
ElfShdr *newElfShdr(vlong);
ElfPhdr *newElfPhdr(void);
uint32  elfwritehdr(void);
uint32  elfwritephdrs(void);
uint32  elfwriteshdrs(void);
void    elfwritedynent(LSym*, int, uint64);
void    elfwritedynentsym(LSym*, int, LSym*);
void    elfwritedynentsymsize(LSym*, int, LSym*);
uint32  elfhash(uchar*);
uint64  startelf(void);
uint64  endelf(void);
extern  int     numelfphdr;
extern  int     numelfshdr;
extern  int     iself;
extern  int     elfverneed;
int     elfinterp(ElfShdr*, uint64, uint64, char*);
int     elfwriteinterp(void);
int     elfnetbsdsig(ElfShdr*, uint64, uint64);
int     elfwritenetbsdsig(void);
int     elfopenbsdsig(ElfShdr*, uint64, uint64);
int     elfwriteopenbsdsig(void);
void    addbuildinfo(char*);
int     elfbuildinfo(ElfShdr*, uint64, uint64);
int     elfwritebuildinfo(void);
void    elfdynhash(void);
ElfPhdr* elfphload(Segment*);
ElfShdr* elfshbits(Section*);
ElfShdr* elfshalloc(Section*);
ElfShdr* elfshname(char*);
ElfShdr* elfshreloc(Section*);
void    elfsetstring(char*, int);
void    elfaddverneed(LSym*);
void    elfemitreloc(void);
void    shsym(ElfShdr*, LSym*);
void    phsh(ElfPhdr*, ElfShdr*);
void    doelf(void);
void    elfsetupplt(void);
void    dwarfaddshstrings(LSym*);
void    dwarfaddelfsectionsyms(void);
void    dwarfaddelfheaders(void);
void    asmbelf(vlong symo);
void    asmbelfsetup(void);
extern char linuxdynld[];
extern char freebsddynld[];
extern char netbsddynld[];
extern char openbsddynld[];
extern char dragonflydynld[];
extern char solarisdynld[];
int     elfreloc1(Reloc*, vlong sectoff);
void    putelfsectionsyms(void);

EXTERN  int     elfstrsize;
EXTERN  char*   elfstrdat;
EXTERN  int     buildinfolen;

/*
 * Total amount of space to reserve at the start of the file
 * for Header, PHeaders, SHeaders, and interp.
 * May waste some.
 * On FreeBSD, cannot be larger than a page.
 */
#define ELFRESERVE      3072

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