The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/exec_elf.h

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    1 /*      $NetBSD: exec_elf.h,v 1.75 2004/02/13 11:36:23 wiz Exp $        */
    2 
    3 /*-
    4  * Copyright (c) 1994 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Christos Zoulas.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by the NetBSD
   21  *      Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #ifndef _SYS_EXEC_ELF_H_
   40 #define _SYS_EXEC_ELF_H_
   41 
   42 /*
   43  * The current ELF ABI specification is available at:
   44  *      http://www.sco.com/developers/gabi/
   45  *
   46  * Current header definitions are in:
   47  *      http://www.sco.com/developers/gabi/latest/ch4.eheader.html
   48  */
   49 
   50 #if defined(_KERNEL) || defined(_STANDALONE)
   51 #include <sys/types.h>
   52 #else
   53 #include <inttypes.h>
   54 #endif /* _KERNEL || _STANDALONE */
   55 
   56 #include <machine/elf_machdep.h>
   57 
   58 typedef uint8_t         Elf_Byte;
   59 
   60 typedef uint32_t        Elf32_Addr;
   61 #define ELF32_FSZ_ADDR  4
   62 typedef uint32_t        Elf32_Off;
   63 #define ELF32_FSZ_OFF   4
   64 typedef int32_t         Elf32_Sword;
   65 #define ELF32_FSZ_SWORD 4
   66 typedef uint32_t        Elf32_Word;
   67 #define ELF32_FSZ_WORD  4
   68 typedef uint16_t        Elf32_Half;
   69 #define ELF32_FSZ_HALF  2
   70 
   71 typedef uint64_t        Elf64_Addr;
   72 #define ELF64_FSZ_ADDR  8
   73 typedef uint64_t        Elf64_Off;
   74 #define ELF64_FSZ_OFF   8
   75 typedef int32_t         Elf64_Shalf;
   76 #define ELF64_FSZ_SHALF 4
   77 
   78 #ifndef ELF64_FSZ_SWORD
   79 typedef int32_t         Elf64_Sword;
   80 #define ELF64_FSZ_SWORD 4
   81 #endif /* ELF64_FSZ_SWORD */
   82 #ifndef ELF64_FSZ_WORD
   83 typedef uint32_t        Elf64_Word;
   84 #define ELF64_FSZ_WORD  4
   85 #endif /* ELF64_FSZ_WORD */
   86 
   87 typedef int64_t         Elf64_Sxword;
   88 #define ELF64_FSZ_XWORD 8
   89 typedef uint64_t        Elf64_Xword;
   90 #define ELF64_FSZ_XWORD 8
   91 typedef uint32_t        Elf64_Half;
   92 #define ELF64_FSZ_HALF  4
   93 typedef uint16_t        Elf64_Quarter;
   94 #define ELF64_FSZ_QUARTER 2
   95 
   96 /*
   97  * ELF Header
   98  */
   99 #define ELF_NIDENT      16
  100 
  101 typedef struct {
  102         unsigned char   e_ident[ELF_NIDENT];    /* Id bytes */
  103         Elf32_Half      e_type;                 /* file type */
  104         Elf32_Half      e_machine;              /* machine type */
  105         Elf32_Word      e_version;              /* version number */
  106         Elf32_Addr      e_entry;                /* entry point */
  107         Elf32_Off       e_phoff;                /* Program hdr offset */
  108         Elf32_Off       e_shoff;                /* Section hdr offset */
  109         Elf32_Word      e_flags;                /* Processor flags */
  110         Elf32_Half      e_ehsize;               /* sizeof ehdr */
  111         Elf32_Half      e_phentsize;            /* Program header entry size */
  112         Elf32_Half      e_phnum;                /* Number of program headers */
  113         Elf32_Half      e_shentsize;            /* Section header entry size */
  114         Elf32_Half      e_shnum;                /* Number of section headers */
  115         Elf32_Half      e_shstrndx;             /* String table index */
  116 } Elf32_Ehdr;
  117 
  118 typedef struct {
  119         unsigned char   e_ident[ELF_NIDENT];    /* Id bytes */
  120         Elf64_Quarter   e_type;                 /* file type */
  121         Elf64_Quarter   e_machine;              /* machine type */
  122         Elf64_Half      e_version;              /* version number */
  123         Elf64_Addr      e_entry;                /* entry point */
  124         Elf64_Off       e_phoff;                /* Program hdr offset */
  125         Elf64_Off       e_shoff;                /* Section hdr offset */
  126         Elf64_Half      e_flags;                /* Processor flags */
  127         Elf64_Quarter   e_ehsize;               /* sizeof ehdr */
  128         Elf64_Quarter   e_phentsize;            /* Program header entry size */
  129         Elf64_Quarter   e_phnum;                /* Number of program headers */
  130         Elf64_Quarter   e_shentsize;            /* Section header entry size */
  131         Elf64_Quarter   e_shnum;                /* Number of section headers */
  132         Elf64_Quarter   e_shstrndx;             /* String table index */
  133 } Elf64_Ehdr;
  134 
  135 /* e_ident offsets */
  136 #define EI_MAG0         0       /* '\177' */
  137 #define EI_MAG1         1       /* 'E'    */
  138 #define EI_MAG2         2       /* 'L'    */
  139 #define EI_MAG3         3       /* 'F'    */
  140 #define EI_CLASS        4       /* File class */
  141 #define EI_DATA         5       /* Data encoding */
  142 #define EI_VERSION      6       /* File version */
  143 #define EI_OSABI        7       /* Operating system/ABI identification */
  144 #define EI_ABIVERSION   8       /* ABI version */
  145 #define EI_PAD          9       /* Start of padding bytes up to EI_NIDENT*/
  146 
  147 /* e_ident[EI_MAG0,EI_MAG3] */
  148 #define ELFMAG0         0x7f
  149 #define ELFMAG1         'E'
  150 #define ELFMAG2         'L'
  151 #define ELFMAG3         'F'
  152 #define ELFMAG          "\177ELF"
  153 #define SELFMAG         4
  154 
  155 /* e_ident[EI_CLASS] */
  156 #define ELFCLASSNONE    0       /* Invalid class */
  157 #define ELFCLASS32      1       /* 32-bit objects */
  158 #define ELFCLASS64      2       /* 64-bit objects */
  159 #define ELFCLASSNUM     3
  160 
  161 /* e_ident[EI_DATA] */
  162 #define ELFDATANONE     0       /* Invalid data encoding */
  163 #define ELFDATA2LSB     1       /* 2's complement values, LSB first */
  164 #define ELFDATA2MSB     2       /* 2's complement values, MSB first */
  165 
  166 /* e_ident[EI_VERSION] */
  167 #define EV_NONE         0       /* Invalid version */
  168 #define EV_CURRENT      1       /* Current version */
  169 #define EV_NUM          2
  170 
  171 /* e_ident[EI_OSABI] */
  172 #define ELFOSABI_SYSV           0       /* UNIX System V ABI */
  173 #define ELFOSABI_HPUX           1       /* HP-UX operating system */
  174 #define ELFOSABI_NETBSD         2       /* NetBSD */
  175 #define ELFOSABI_LINUX          3       /* GNU/Linux */
  176 #define ELFOSABI_HURD           4       /* GNU/Hurd */
  177 #define ELFOSABI_86OPEN         5       /* 86Open */
  178 #define ELFOSABI_SOLARIS        6       /* Solaris */
  179 #define ELFOSABI_MONTEREY       7       /* Monterey */
  180 #define ELFOSABI_IRIX           8       /* IRIX */
  181 #define ELFOSABI_FREEBSD        9       /* FreeBSD */
  182 #define ELFOSABI_TRU64          10      /* TRU64 UNIX */
  183 #define ELFOSABI_MODESTO        11      /* Novell Modesto */
  184 #define ELFOSABI_OPENBSD        12      /* OpenBSD */
  185 /* Unofficial OSABIs follow */
  186 #define ELFOSABI_ARM            97      /* ARM */
  187 #define ELFOSABI_STANDALONE     255     /* Standalone (embedded) application */
  188 
  189 /* e_type */
  190 #define ET_NONE         0       /* No file type */
  191 #define ET_REL          1       /* Relocatable file */
  192 #define ET_EXEC         2       /* Executable file */
  193 #define ET_DYN          3       /* Shared object file */
  194 #define ET_CORE         4       /* Core file */
  195 #define ET_NUM          5
  196 
  197 #define ET_LOOS         0xfe00  /* Operating system specific range */
  198 #define ET_HIOS         0xfeff
  199 #define ET_LOPROC       0xff00  /* Processor-specific range */
  200 #define ET_HIPROC       0xffff
  201 
  202 /* e_machine */
  203 #define EM_NONE         0       /* No machine */
  204 #define EM_M32          1       /* AT&T WE 32100 */
  205 #define EM_SPARC        2       /* SPARC */
  206 #define EM_386          3       /* Intel 80386 */
  207 #define EM_68K          4       /* Motorola 68000 */
  208 #define EM_88K          5       /* Motorola 88000 */
  209 #define EM_486          6       /* Intel 80486 */
  210 #define EM_860          7       /* Intel 80860 */
  211 #define EM_MIPS         8       /* MIPS I Architecture */
  212 #define EM_S370         9       /* Amdahl UTS on System/370 */
  213 #define EM_MIPS_RS3_LE  10      /* MIPS RS3000 Little-endian */
  214                         /* 11-14 - Reserved */
  215 #define EM_RS6000       11      /* IBM RS/6000 XXX reserved */
  216 #define EM_PARISC       15      /* Hewlett-Packard PA-RISC */
  217 #define EM_NCUBE        16      /* NCube XXX reserved */
  218 #define EM_VPP500       17      /* Fujitsu VPP500 */
  219 #define EM_SPARC32PLUS  18      /* Enhanced instruction set SPARC */
  220 #define EM_960          19      /* Intel 80960 */
  221 #define EM_PPC          20      /* PowerPC */
  222 #define EM_PPC64        21      /* 64-bit PowerPC */
  223                         /* 22-35 - Reserved */
  224 #define EM_V800         36      /* NEC V800 */
  225 #define EM_FR20         37      /* Fujitsu FR20 */
  226 #define EM_RH32         38      /* TRW RH-32 */
  227 #define EM_RCE          39      /* Motorola RCE */
  228 #define EM_ARM          40      /* Advanced RISC Machines ARM */
  229 #define EM_ALPHA        41      /* DIGITAL Alpha */
  230 #define EM_SH           42      /* Hitachi Super-H */
  231 #define EM_SPARCV9      43      /* SPARC Version 9 */
  232 #define EM_TRICORE      44      /* Siemens Tricore */
  233 #define EM_ARC          45      /* Argonaut RISC Core */
  234 #define EM_H8_300       46      /* Hitachi H8/300 */
  235 #define EM_H8_300H      47      /* Hitachi H8/300H */
  236 #define EM_H8S          48      /* Hitachi H8S */
  237 #define EM_H8_500       49      /* Hitachi H8/500 */
  238 #define EM_IA_64        50      /* Intel Merced Processor */
  239 #define EM_MIPS_X       51      /* Stanford MIPS-X */
  240 #define EM_COLDFIRE     52      /* Motorola Coldfire */
  241 #define EM_68HC12       53      /* Motorola MC68HC12 */
  242 #define EM_MMA          54      /* Fujitsu MMA Multimedia Accelerator */
  243 #define EM_PCP          55      /* Siemens PCP */
  244 #define EM_NCPU         56      /* Sony nCPU embedded RISC processor */
  245 #define EM_NDR1         57      /* Denso NDR1 microprocessor */
  246 #define EM_STARCORE     58      /* Motorola Star*Core processor */
  247 #define EM_ME16         59      /* Toyota ME16 processor */
  248 #define EM_ST100        60      /* STMicroelectronics ST100 processor */
  249 #define EM_TINYJ        61      /* Advanced Logic Corp. TinyJ embedded family processor */
  250 #define EM_X86_64       62      /* AMD x86-64 architecture */
  251 #define EM_PDSP         63      /* Sony DSP Processor */
  252 #define EM_PDP10        64      /* Digital Equipment Corp. PDP-10 */
  253 #define EM_PDP11        65      /* Digital Equipment Corp. PDP-11 */
  254 #define EM_FX66         66      /* Siemens FX66 microcontroller */
  255 #define EM_ST9PLUS      67      /* STMicroelectronics ST9+ 8/16 bit microcontroller */
  256 #define EM_ST7          68      /* STMicroelectronics ST7 8-bit microcontroller */
  257 #define EM_68HC16       69      /* Motorola MC68HC16 Microcontroller */
  258 #define EM_68HC11       70      /* Motorola MC68HC11 Microcontroller */
  259 #define EM_68HC08       71      /* Motorola MC68HC08 Microcontroller */
  260 #define EM_68HC05       72      /* Motorola MC68HC05 Microcontroller */
  261 #define EM_SVX          73      /* Silicon Graphics SVx */
  262 #define EM_ST19         74      /* STMicroelectronics ST19 8-bit CPU */
  263 #define EM_VAX          75      /* Digital VAX */
  264 #define EM_CRIS         76      /* Axis Communications 32-bit embedded processor */
  265 #define EM_JAVELIN      77      /* Infineon Technologies 32-bit embedded CPU */
  266 #define EM_FIREPATH     78      /* Element 14 64-bit DSP processor */
  267 #define EM_ZSP          79      /* LSI Logic's 16-bit DSP processor */
  268 #define EM_MMIX         80      /* Donald Knuth's educational 64-bit processor */
  269 #define EM_HUANY        81      /* Harvard's machine-independent format */
  270 #define EM_PRISM        82      /* SiTera Prism */
  271 #define EM_AVR          83      /* Atmel AVR 8-bit microcontroller */
  272 #define EM_FR30         84      /* Fujitsu FR30 */
  273 #define EM_D10V         85      /* Mitsubishi D10V */
  274 #define EM_D30V         86      /* Mitsubishi D30V */
  275 #define EM_V850         87      /* NEC v850 */
  276 #define EM_M32R         88      /* Mitsubishi M32R */
  277 #define EM_MN10300      89      /* Matsushita MN10300 */
  278 #define EM_MN10200      90      /* Matsushita MN10200 */
  279 #define EM_PJ           91      /* picoJava */
  280 #define EM_OPENRISC     92      /* OpenRISC 32-bit embedded processor */
  281 #define EM_ARC_A5       93      /* ARC Cores Tangent-A5 */
  282 #define EM_XTENSA       94      /* Tensilica Xtensa Architecture */
  283 #define EM_NS32K        97      /* National Semiconductor 32000 series */
  284 
  285 /* Unofficial machine types follow */
  286 #define EM_ALPHA_EXP    36902   /* used by NetBSD/alpha; obsolete */
  287 #define EM_NUM          36903
  288 
  289 /*
  290  * Program Header
  291  */
  292 typedef struct {
  293         Elf32_Word      p_type;         /* entry type */
  294         Elf32_Off       p_offset;       /* offset */
  295         Elf32_Addr      p_vaddr;        /* virtual address */
  296         Elf32_Addr      p_paddr;        /* physical address */
  297         Elf32_Word      p_filesz;       /* file size */
  298         Elf32_Word      p_memsz;        /* memory size */
  299         Elf32_Word      p_flags;        /* flags */
  300         Elf32_Word      p_align;        /* memory & file alignment */
  301 } Elf32_Phdr;
  302 
  303 typedef struct {
  304         Elf64_Half      p_type;         /* entry type */
  305         Elf64_Half      p_flags;        /* flags */
  306         Elf64_Off       p_offset;       /* offset */
  307         Elf64_Addr      p_vaddr;        /* virtual address */
  308         Elf64_Addr      p_paddr;        /* physical address */
  309         Elf64_Xword     p_filesz;       /* file size */
  310         Elf64_Xword     p_memsz;        /* memory size */
  311         Elf64_Xword     p_align;        /* memory & file alignment */
  312 } Elf64_Phdr;
  313 
  314 /* p_type */
  315 #define PT_NULL         0               /* Program header table entry unused */
  316 #define PT_LOAD         1               /* Loadable program segment */
  317 #define PT_DYNAMIC      2               /* Dynamic linking information */
  318 #define PT_INTERP       3               /* Program interpreter */
  319 #define PT_NOTE         4               /* Auxiliary information */
  320 #define PT_SHLIB        5               /* Reserved, unspecified semantics */
  321 #define PT_PHDR         6               /* Entry for header table itself */
  322 #define PT_NUM          7
  323 
  324 #define PT_LOOS         0x60000000      /* OS-specific range */
  325 #define PT_HIOS         0x6fffffff
  326 #define PT_LOPROC       0x70000000      /* Processor-specific range */
  327 #define PT_HIPROC       0x7fffffff
  328 
  329 #define PT_MIPS_REGINFO 0x70000000
  330 
  331 /* p_flags */
  332 #define PF_R            0x4     /* Segment is readable */
  333 #define PF_W            0x2     /* Segment is writable */
  334 #define PF_X            0x1     /* Segment is executable */
  335 
  336 #define PF_MASKOS       0x0ff00000      /* Operating system specific values */
  337 #define PF_MASKPROC     0xf0000000      /* Processor-specific values */
  338 
  339 /*
  340  * Section Headers
  341  */
  342 typedef struct {
  343         Elf32_Word      sh_name;        /* section name (.shstrtab index) */
  344         Elf32_Word      sh_type;        /* section type */
  345         Elf32_Word      sh_flags;       /* section flags */
  346         Elf32_Addr      sh_addr;        /* virtual address */
  347         Elf32_Off       sh_offset;      /* file offset */
  348         Elf32_Word      sh_size;        /* section size */
  349         Elf32_Word      sh_link;        /* link to another */
  350         Elf32_Word      sh_info;        /* misc info */
  351         Elf32_Word      sh_addralign;   /* memory alignment */
  352         Elf32_Word      sh_entsize;     /* table entry size */
  353 } Elf32_Shdr;
  354 
  355 typedef struct {
  356         Elf64_Half      sh_name;        /* section name (.shstrtab index) */
  357         Elf64_Half      sh_type;        /* section type */
  358         Elf64_Xword     sh_flags;       /* section flags */
  359         Elf64_Addr      sh_addr;        /* virtual address */
  360         Elf64_Off       sh_offset;      /* file offset */
  361         Elf64_Xword     sh_size;        /* section size */
  362         Elf64_Half      sh_link;        /* link to another */
  363         Elf64_Half      sh_info;        /* misc info */
  364         Elf64_Xword     sh_addralign;   /* memory alignment */
  365         Elf64_Xword     sh_entsize;     /* table entry size */
  366 } Elf64_Shdr;
  367 
  368 /* sh_type */
  369 #define SHT_NULL        0               /* Section header table entry unused */
  370 #define SHT_PROGBITS    1               /* Program information */
  371 #define SHT_SYMTAB      2               /* Symbol table */
  372 #define SHT_STRTAB      3               /* String table */
  373 #define SHT_RELA        4               /* Relocation information w/ addend */
  374 #define SHT_HASH        5               /* Symbol hash table */
  375 #define SHT_DYNAMIC     6               /* Dynamic linking information */
  376 #define SHT_NOTE        7               /* Auxiliary information */
  377 #define SHT_NOBITS      8               /* No space allocated in file image */
  378 #define SHT_REL         9               /* Relocation information w/o addend */
  379 #define SHT_SHLIB       10              /* Reserved, unspecified semantics */
  380 #define SHT_DYNSYM      11              /* Symbol table for dynamic linker */
  381 #define SHT_NUM         12
  382 
  383 #define SHT_LOOS        0x60000000      /* Operating system specific range */
  384 #define SHT_HIOS        0x6fffffff
  385 #define SHT_LOPROC      0x70000000      /* Processor-specific range */
  386 #define SHT_HIPROC      0x7fffffff
  387 #define SHT_LOUSER      0x80000000      /* Application-specific range */
  388 #define SHT_HIUSER      0xffffffff
  389 
  390 /* sh_flags */
  391 #define SHF_WRITE       0x1             /* Section contains writable data */
  392 #define SHF_ALLOC       0x2             /* Section occupies memory */
  393 #define SHF_EXECINSTR   0x4             /* Section contains executable insns */
  394 
  395 #define SHF_MASKOS      0x0f000000      /* Operating system specific values */
  396 #define SHF_MASKPROC    0xf0000000      /* Processor-specific values */
  397 
  398 /*
  399  * Symbol Table
  400  */
  401 typedef struct {
  402         Elf32_Word      st_name;        /* Symbol name (.symtab index) */
  403         Elf32_Word      st_value;       /* value of symbol */
  404         Elf32_Word      st_size;        /* size of symbol */
  405         Elf_Byte        st_info;        /* type / binding attrs */
  406         Elf_Byte        st_other;       /* unused */
  407         Elf32_Half      st_shndx;       /* section index of symbol */
  408 } Elf32_Sym;
  409 
  410 typedef struct {
  411         Elf64_Half      st_name;        /* Symbol name (.symtab index) */
  412         Elf_Byte        st_info;        /* type / binding attrs */
  413         Elf_Byte        st_other;       /* unused */
  414         Elf64_Quarter   st_shndx;       /* section index of symbol */
  415         Elf64_Addr      st_value;       /* value of symbol */
  416         Elf64_Xword     st_size;        /* size of symbol */
  417 } Elf64_Sym;
  418 
  419 /* Symbol Table index of the undefined symbol */
  420 #define ELF_SYM_UNDEFINED       0
  421 
  422 /* st_info: Symbol Bindings */
  423 #define STB_LOCAL               0       /* local symbol */
  424 #define STB_GLOBAL              1       /* global symbol */
  425 #define STB_WEAK                2       /* weakly defined global symbol */
  426 #define STB_NUM                 3
  427 
  428 #define STB_LOOS                10      /* Operating system specific range */
  429 #define STB_HIOS                12
  430 #define STB_LOPROC              13      /* Processor-specific range */
  431 #define STB_HIPROC              15
  432 
  433 /* st_info: Symbol Types */
  434 #define STT_NOTYPE              0       /* Type not specified */
  435 #define STT_OBJECT              1       /* Associated with a data object */
  436 #define STT_FUNC                2       /* Associated with a function */
  437 #define STT_SECTION             3       /* Associated with a section */
  438 #define STT_FILE                4       /* Associated with a file name */
  439 #define STT_NUM                 5
  440 
  441 #define STT_LOOS                10      /* Operating system specific range */
  442 #define STT_HIOS                12
  443 #define STT_LOPROC              13      /* Processor-specific range */
  444 #define STT_HIPROC              15
  445 
  446 /* st_info utility macros */
  447 #define ELF32_ST_BIND(info)             ((Elf32_Word)(info) >> 4)
  448 #define ELF32_ST_TYPE(info)             ((Elf32_Word)(info) & 0xf)
  449 #define ELF32_ST_INFO(bind,type)        ((Elf_Byte)(((bind) << 4) | ((type) & 0xf)))
  450 
  451 #define ELF64_ST_BIND(info)             ((Elf64_Xword)(info) >> 4)
  452 #define ELF64_ST_TYPE(info)             ((Elf64_Xword)(info) & 0xf)
  453 #define ELF64_ST_INFO(bind,type)        ((Elf_Byte)(((bind) << 4) | ((type) & 0xf)))
  454 
  455 /*
  456  * Special section indexes
  457  */
  458 #define SHN_UNDEF       0               /* Undefined section */
  459 
  460 #define SHN_LORESERVE   0xff00          /* Reserved range */
  461 #define SHN_ABS         0xfff1          /*  Absolute symbols */
  462 #define SHN_COMMON      0xfff2          /*  Common symbols */
  463 #define SHN_HIRESERVE   0xffff
  464 
  465 #define SHN_LOPROC      0xff00          /* Processor-specific range */
  466 #define SHN_HIPROC      0xff1f
  467 #define SHN_LOOS        0xff20          /* Operating system specific range */
  468 #define SHN_HIOS        0xff3f
  469 
  470 #define SHN_MIPS_ACOMMON 0xff00
  471 #define SHN_MIPS_TEXT   0xff01
  472 #define SHN_MIPS_DATA   0xff02
  473 #define SHN_MIPS_SCOMMON 0xff03
  474 
  475 /*
  476  * Relocation Entries
  477  */
  478 typedef struct {
  479         Elf32_Word      r_offset;       /* where to do it */
  480         Elf32_Word      r_info;         /* index & type of relocation */
  481 } Elf32_Rel;
  482 
  483 typedef struct {
  484         Elf32_Word      r_offset;       /* where to do it */
  485         Elf32_Word      r_info;         /* index & type of relocation */
  486         Elf32_Sword     r_addend;       /* adjustment value */
  487 } Elf32_Rela;
  488 
  489 /* r_info utility macros */
  490 #define ELF32_R_SYM(info)       ((info) >> 8)
  491 #define ELF32_R_TYPE(info)      ((info) & 0xff)
  492 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
  493 
  494 typedef struct {
  495         Elf64_Addr      r_offset;       /* where to do it */
  496         Elf64_Xword     r_info;         /* index & type of relocation */
  497 } Elf64_Rel;
  498 
  499 typedef struct {
  500         Elf64_Addr      r_offset;       /* where to do it */
  501         Elf64_Xword     r_info;         /* index & type of relocation */
  502         Elf64_Sxword    r_addend;       /* adjustment value */
  503 } Elf64_Rela;
  504 
  505 /* r_info utility macros */
  506 #define ELF64_R_SYM(info)       ((info) >> 32)
  507 #define ELF64_R_TYPE(info)      ((info) & 0xffffffff)
  508 #define ELF64_R_INFO(sym,type)  (((sym) << 32) + (type))
  509 
  510 /*
  511  * Dynamic Section structure array
  512  */
  513 typedef struct {
  514         Elf32_Word      d_tag;          /* entry tag value */
  515         union {
  516             Elf32_Addr  d_ptr;
  517             Elf32_Word  d_val;
  518         } d_un;
  519 } Elf32_Dyn;
  520 
  521 typedef struct {
  522         Elf64_Xword     d_tag;          /* entry tag value */
  523         union {
  524             Elf64_Addr  d_ptr;
  525             Elf64_Xword d_val;
  526         } d_un;
  527 } Elf64_Dyn;
  528 
  529 /* d_tag */
  530 #define DT_NULL         0       /* Marks end of dynamic array */
  531 #define DT_NEEDED       1       /* Name of needed library (DT_STRTAB offset) */
  532 #define DT_PLTRELSZ     2       /* Size, in bytes, of relocations in PLT */
  533 #define DT_PLTGOT       3       /* Address of PLT and/or GOT */
  534 #define DT_HASH         4       /* Address of symbol hash table */
  535 #define DT_STRTAB       5       /* Address of string table */
  536 #define DT_SYMTAB       6       /* Address of symbol table */
  537 #define DT_RELA         7       /* Address of Rela relocation table */
  538 #define DT_RELASZ       8       /* Size, in bytes, of DT_RELA table */
  539 #define DT_RELAENT      9       /* Size, in bytes, of one DT_RELA entry */
  540 #define DT_STRSZ        10      /* Size, in bytes, of DT_STRTAB table */
  541 #define DT_SYMENT       11      /* Size, in bytes, of one DT_SYMTAB entry */
  542 #define DT_INIT         12      /* Address of initialization function */
  543 #define DT_FINI         13      /* Address of termination function */
  544 #define DT_SONAME       14      /* Shared object name (DT_STRTAB offset) */
  545 #define DT_RPATH        15      /* Library search path (DT_STRTAB offset) */
  546 #define DT_SYMBOLIC     16      /* Start symbol search within local object */
  547 #define DT_REL          17      /* Address of Rel relocation table */
  548 #define DT_RELSZ        18      /* Size, in bytes, of DT_REL table */
  549 #define DT_RELENT       19      /* Size, in bytes, of one DT_REL entry */
  550 #define DT_PLTREL       20      /* Type of PLT relocation entries */
  551 #define DT_DEBUG        21      /* Used for debugging; unspecified */
  552 #define DT_TEXTREL      22      /* Relocations might modify non-writable seg */
  553 #define DT_JMPREL       23      /* Address of relocations associated with PLT */
  554 #define DT_BIND_NOW     24      /* Process all relocations at load-time */
  555 #define DT_INIT_ARRAY   25      /* Address of initialization function array */
  556 #define DT_FINI_ARRAY   26      /* Size, in bytes, of DT_INIT_ARRAY array */
  557 #define DT_INIT_ARRAYSZ 27      /* Address of termination function array */
  558 #define DT_FINI_ARRAYSZ 28      /* Size, in bytes, of DT_FINI_ARRAY array*/
  559 #define DT_NUM          29
  560 
  561 #define DT_LOOS         0x60000000      /* Operating system specific range */
  562 #define DT_HIOS         0x6fffffff
  563 #define DT_LOPROC       0x70000000      /* Processor-specific range */
  564 #define DT_HIPROC       0x7fffffff
  565 
  566 /*
  567  * Auxiliary Vectors
  568  */
  569 typedef struct {
  570         Elf32_Word      a_type;                         /* 32-bit id */
  571         Elf32_Word      a_v;                            /* 32-bit id */
  572 } Aux32Info;
  573 
  574 typedef struct {
  575         Elf64_Half      a_type;                         /* 32-bit id */
  576         Elf64_Xword     a_v;                            /* 64-bit id */
  577 } Aux64Info;
  578 
  579 /* a_type */
  580 #define AT_NULL         0       /* Marks end of array */
  581 #define AT_IGNORE       1       /* No meaning, a_un is undefined */
  582 #define AT_EXECFD       2       /* Open file descriptor of object file */
  583 #define AT_PHDR         3       /* &phdr[0] */
  584 #define AT_PHENT        4       /* sizeof(phdr[0]) */
  585 #define AT_PHNUM        5       /* # phdr entries */
  586 #define AT_PAGESZ       6       /* PAGESIZE */
  587 #define AT_BASE         7       /* Interpreter base addr */
  588 #define AT_FLAGS        8       /* Processor flags */
  589 #define AT_ENTRY        9       /* Entry address of executable */
  590 #define AT_DCACHEBSIZE  10      /* Data cache block size */
  591 #define AT_ICACHEBSIZE  11      /* Instruction cache block size */
  592 #define AT_UCACHEBSIZE  12      /* Unified cache block size */
  593 
  594         /* Vendor specific */
  595 #define AT_MIPS_NOTELF  10      /* XXX a_val != 0 -> MIPS XCOFF executable */
  596 
  597 #define AT_EUID         2000    /* euid (solaris compatible numbers) */
  598 #define AT_RUID         2001    /* ruid (solaris compatible numbers) */
  599 #define AT_EGID         2002    /* egid (solaris compatible numbers) */
  600 #define AT_RGID         2003    /* rgid (solaris compatible numbers) */
  601 
  602         /* Solaris kernel specific */
  603 #define AT_SUN_LDELF    2004    /* dynamic linker's ELF header */
  604 #define AT_SUN_LDSHDR   2005    /* dynamic linker's section header */
  605 #define AT_SUN_LDNAME   2006    /* dynamic linker's name */
  606 #define AT_SUN_LPGSIZE  2007    /* large pagesize */
  607 
  608         /* Other information */
  609 #define AT_SUN_PLATFORM 2008    /* sysinfo(SI_PLATFORM) */
  610 #define AT_SUN_HWCAP    2009    /* process hardware capabilities */
  611 #define AT_SUN_IFLUSH   2010    /* do we need to flush the instruction cache? */
  612 #define AT_SUN_CPU      2011    /* CPU name */
  613         /* ibcs2 emulation band aid */
  614 #define AT_SUN_EMUL_ENTRY 2012  /* coff entry point */
  615 #define AT_SUN_EMUL_EXECFD 2013 /* coff file descriptor */
  616         /* Executable's fully resolved name */
  617 #define AT_SUN_EXECNAME 2014
  618 
  619 /*
  620  * Note Headers
  621  */
  622 typedef struct {
  623         Elf32_Word n_namesz;
  624         Elf32_Word n_descsz;
  625         Elf32_Word n_type;
  626 } Elf32_Nhdr;
  627 
  628 typedef struct {
  629         Elf64_Half n_namesz;
  630         Elf64_Half n_descsz;
  631         Elf64_Half n_type;
  632 } Elf64_Nhdr;
  633 
  634 #define ELF_NOTE_TYPE_ABI_TAG           1
  635 
  636 /* GNU-specific note name and description sizes */
  637 #define ELF_NOTE_ABI_NAMESZ             4
  638 #define ELF_NOTE_ABI_DESCSZ             16
  639 /* GNU-specific note name */
  640 #define ELF_NOTE_ABI_NAME               "GNU\0"
  641 
  642 /* GNU-specific OS/version value stuff */
  643 #define ELF_NOTE_ABI_OS_LINUX           0
  644 #define ELF_NOTE_ABI_OS_HURD            1
  645 #define ELF_NOTE_ABI_OS_SOLARIS         2
  646 
  647 /* NetBSD-specific note type: Emulation name.  desc is emul name string. */
  648 #define ELF_NOTE_TYPE_NETBSD_TAG        1
  649 
  650 /* NetBSD-specific note name and description sizes */
  651 #define ELF_NOTE_NETBSD_NAMESZ          7
  652 #define ELF_NOTE_NETBSD_DESCSZ          4
  653 /* NetBSD-specific note name */
  654 #define ELF_NOTE_NETBSD_NAME            "NetBSD\0\0"
  655 
  656 /*
  657  * NetBSD-specific core file information.
  658  *
  659  * NetBSD ELF core files use notes to provide information about
  660  * the process's state.  The note name is "NetBSD-CORE" for
  661  * information that is global to the process, and "NetBSD-CORE@nn",
  662  * where "nn" is the lwpid of the LWP that the information belongs
  663  * to (such as register state).
  664  *
  665  * We use the following note identifiers:
  666  *
  667  *      ELF_NOTE_NETBSD_CORE_PROCINFO
  668  *              Note is a "netbsd_elfcore_procinfo" structure.
  669  *
  670  * We also use ptrace(2) request numbers (the ones that exist in
  671  * machine-dependent space) to identify register info notes.  The
  672  * info in such notes is in the same format that ptrace(2) would
  673  * export that information.
  674  *
  675  * Please try to keep the members of this structure nicely aligned,
  676  * and if you add elements, add them to the end and bump the version.
  677  */
  678 
  679 #define ELF_NOTE_NETBSD_CORE_NAME       "NetBSD-CORE"
  680 
  681 #define ELF_NOTE_NETBSD_CORE_PROCINFO   1
  682 
  683 #define NETBSD_ELFCORE_PROCINFO_VERSION 1
  684 
  685 struct netbsd_elfcore_procinfo {
  686         /* Version 1 fields start here. */
  687         uint32_t        cpi_version;    /* netbsd_elfcore_procinfo version */
  688         uint32_t        cpi_cpisize;    /* sizeof(netbsd_elfcore_procinfo) */
  689         uint32_t        cpi_signo;      /* killing signal */
  690         uint32_t        cpi_sigcode;    /* signal code */
  691         uint32_t        cpi_sigpend[4]; /* pending signals */
  692         uint32_t        cpi_sigmask[4]; /* blocked signals */
  693         uint32_t        cpi_sigignore[4];/* blocked signals */
  694         uint32_t        cpi_sigcatch[4];/* blocked signals */
  695         int32_t         cpi_pid;        /* process ID */
  696         int32_t         cpi_ppid;       /* parent process ID */
  697         int32_t         cpi_pgrp;       /* process group ID */
  698         int32_t         cpi_sid;        /* session ID */
  699         uint32_t        cpi_ruid;       /* real user ID */
  700         uint32_t        cpi_euid;       /* effective user ID */
  701         uint32_t        cpi_svuid;      /* saved user ID */
  702         uint32_t        cpi_rgid;       /* real group ID */
  703         uint32_t        cpi_egid;       /* effective group ID */
  704         uint32_t        cpi_svgid;      /* saved group ID */
  705         uint32_t        cpi_nlwps;      /* number of LWPs */
  706         int8_t          cpi_name[32];   /* copy of p->p_comm */
  707         /* Add version 2 fields below here. */
  708         int32_t         cpi_siglwp;     /* LWP target of killing signal */
  709 };
  710 
  711 #if defined(ELFSIZE)
  712 #define CONCAT(x,y)     __CONCAT(x,y)
  713 #define ELFNAME(x)      CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x)))
  714 #define ELFNAME2(x,y)   CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y))))
  715 #define ELFNAMEEND(x)   CONCAT(x,CONCAT(_elf,ELFSIZE))
  716 #define ELFDEFNNAME(x)  CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x)))
  717 #endif
  718 
  719 #if defined(ELFSIZE) && (ELFSIZE == 32)
  720 #define Elf_Ehdr        Elf32_Ehdr
  721 #define Elf_Phdr        Elf32_Phdr
  722 #define Elf_Shdr        Elf32_Shdr
  723 #define Elf_Sym         Elf32_Sym
  724 #define Elf_Rel         Elf32_Rel
  725 #define Elf_Rela        Elf32_Rela
  726 #define Elf_Dyn         Elf32_Dyn
  727 #define Elf_Word        Elf32_Word
  728 #define Elf_Sword       Elf32_Sword
  729 #define Elf_Addr        Elf32_Addr
  730 #define Elf_Off         Elf32_Off
  731 #define Elf_Nhdr        Elf32_Nhdr
  732 
  733 #define ELF_R_SYM       ELF32_R_SYM
  734 #define ELF_R_TYPE      ELF32_R_TYPE
  735 #define ELFCLASS        ELFCLASS32
  736 
  737 #define ELF_ST_BIND     ELF32_ST_BIND
  738 #define ELF_ST_TYPE     ELF32_ST_TYPE
  739 #define ELF_ST_INFO     ELF32_ST_INFO
  740 
  741 #define AuxInfo         Aux32Info
  742 #elif defined(ELFSIZE) && (ELFSIZE == 64)
  743 #define Elf_Ehdr        Elf64_Ehdr
  744 #define Elf_Phdr        Elf64_Phdr
  745 #define Elf_Shdr        Elf64_Shdr
  746 #define Elf_Sym         Elf64_Sym
  747 #define Elf_Rel         Elf64_Rel
  748 #define Elf_Rela        Elf64_Rela
  749 #define Elf_Dyn         Elf64_Dyn
  750 #define Elf_Word        Elf64_Word
  751 #define Elf_Sword       Elf64_Sword
  752 #define Elf_Addr        Elf64_Addr
  753 #define Elf_Off         Elf64_Off
  754 #define Elf_Nhdr        Elf64_Nhdr
  755 
  756 #define ELF_R_SYM       ELF64_R_SYM
  757 #define ELF_R_TYPE      ELF64_R_TYPE
  758 #define ELFCLASS        ELFCLASS64
  759 
  760 #define ELF_ST_BIND     ELF64_ST_BIND
  761 #define ELF_ST_TYPE     ELF64_ST_TYPE
  762 #define ELF_ST_INFO     ELF64_ST_INFO
  763 
  764 #define AuxInfo         Aux64Info
  765 #endif
  766 
  767 #ifdef _KERNEL
  768 
  769 #define ELF_AUX_ENTRIES 12              /* Size of aux array passed to loader */
  770 #define ELF32_NO_ADDR   (~(Elf32_Addr)0) /* Indicates addr. not yet filled in */
  771 #define ELF32_LINK_ADDR ((Elf32_Addr)-2) /* advises to use link address */
  772 #define ELF64_NO_ADDR   (~(Elf64_Addr)0) /* Indicates addr. not yet filled in */
  773 #define ELF64_LINK_ADDR ((Elf64_Addr)-2) /* advises to use link address */
  774 
  775 #if defined(ELFSIZE) && (ELFSIZE == 64)
  776 #define ELF_NO_ADDR     ELF64_NO_ADDR
  777 #define ELF_LINK_ADDR   ELF64_LINK_ADDR
  778 #elif defined(ELFSIZE) && (ELFSIZE == 32)
  779 #define ELF_NO_ADDR     ELF32_NO_ADDR
  780 #define ELF_LINK_ADDR   ELF32_LINK_ADDR
  781 #endif
  782 
  783 #ifndef ELF32_EHDR_FLAGS_OK
  784 #define ELF32_EHDR_FLAGS_OK(eh) 1
  785 #endif
  786 
  787 #ifndef ELF64_EHDR_FLAGS_OK
  788 #define ELF64_EHDR_FLAGS_OK(eh) 1
  789 #endif
  790 
  791 #if defined(ELFSIZE) && (ELFSIZE == 64)
  792 #define ELF_EHDR_FLAGS_OK(eh)   ELF64_EHDR_FLAGS_OK(eh)
  793 #else
  794 #define ELF_EHDR_FLAGS_OK(eh)   ELF32_EHDR_FLAGS_OK(eh)
  795 #endif
  796 
  797 #if defined(ELFSIZE)
  798 struct elf_args {
  799         Elf_Addr  arg_entry;      /* program entry point */
  800         Elf_Addr  arg_interp;     /* Interpreter load address */
  801         Elf_Addr  arg_phaddr;     /* program header address */
  802         Elf_Addr  arg_phentsize;  /* Size of program header */
  803         Elf_Addr  arg_phnum;      /* Number of program headers */
  804 };
  805 #endif
  806 
  807 #ifndef _LKM
  808 #include "opt_execfmt.h"
  809 #endif
  810 
  811 #ifdef EXEC_ELF32
  812 int     exec_elf32_makecmds(struct proc *, struct exec_package *);
  813 int     elf32_copyargs(struct proc *, struct exec_package *, 
  814             struct ps_strings *, char **, void *);
  815 
  816 int     coredump_elf32(struct lwp *, struct vnode *, struct ucred *);
  817 int     coredump_writenote_elf32(struct proc *, struct vnode *,
  818             struct ucred *, off_t, Elf32_Nhdr *, const char *, void *);
  819 
  820 int     elf32_check_header(Elf32_Ehdr *, int);
  821 #endif
  822 
  823 #ifdef EXEC_ELF64
  824 int     exec_elf64_makecmds(struct proc *, struct exec_package *);
  825 int     elf64_read_from(struct proc *, struct vnode *, u_long, caddr_t, int);
  826 int     elf64_copyargs(struct proc *, struct exec_package *, 
  827             struct ps_strings *, char **, void *);
  828 
  829 int     coredump_elf64 __P((struct lwp *, struct vnode *, struct ucred *));
  830 int     coredump_writenote_elf64 __P((struct proc *, struct vnode *,
  831             struct ucred *, off_t, Elf64_Nhdr *, const char *, void *));
  832 
  833 int     elf64_check_header(Elf64_Ehdr *, int);
  834 #endif
  835 
  836 #endif /* _KERNEL */
  837 
  838 #endif /* !_SYS_EXEC_ELF_H_ */

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