output/outelf.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2009 The NASM Authors - All Rights Reserved
   4  *   See the file AUTHORS included with the NASM distribution for
   5  *   the specific copyright holders.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following
   9  *   conditions are met:
  10  *
  11  *   * Redistributions of source code must retain the above copyright
  12  *     notice, this list of conditions and the following disclaimer.
  13  *   * Redistributions in binary form must reproduce the above
  14  *     copyright notice, this list of conditions and the following
  15  *     disclaimer in the documentation and/or other materials provided
  16  *     with the distribution.
  17  *
  18  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  19  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  30  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * ----------------------------------------------------------------------- */
  33
  34 /*
  35  * Internal definitions common to outelf32 and outelf64
  36  */
  37 #ifndef OUTPUT_OUTELF_H
  38 #define OUTPUT_OUTELF_H
  39
  40 #include "output/elf.h"
  41
  42 /* symbol binding */
  43 #define SYM_GLOBAL      ELF32_ST_MKBIND(STB_GLOBAL)
  44 #define SYM_LOCAL       ELF32_ST_MKBIND(STB_LOCAL)
  45
  46 #define GLOBAL_TEMP_BASE  0x40000000 /* bigger than any sane symbol index */
  47
  48 /* alignment of sections in file */
  49 #define SEC_FILEALIGN 16
  50
  51 /* this stuff is needed for the stabs debugging format */
  52 #define TY_STABSSYMLIN 0x40     /* ouch */
  53
  54 /* this stuff is needed for the dwarf debugging format */
  55 #define TY_DEBUGSYMLIN 0x40     /* internal call to debug_out */
  56
  57 /* Known sections with nonstandard defaults */
  58 struct elf_known_section {
  59     const char *name;   /* Name of section */
  60     int type;           /* Section type (SHT_) */
  61     uint32_t flags;     /* Section flags (SHF_) */
  62     uint32_t align;     /* Section alignment */
  63 };
  64 extern const struct elf_known_section elf_known_sections[];
  65
  66 /*
  67  * Special ELF sections (after the real sections but before debugging ones)
  68  */
  69 #define sec_shstrtab            (nsects + 1)
  70 #define sec_symtab              (nsects + 2)
  71 #define sec_strtab              (nsects + 3)
  72 #define sec_numspecial          3
  73
  74 /*
  75  * Debugging ELF sections (last in the file)
  76  */
  77
  78 /* stabs */
  79 #define sec_stab                (nsections-3)
  80 #define sec_stabstr             (nsections-2)
  81 #define sec_rel_stab            (nsections-1)
  82
  83 /* stabs symbol table format */
  84 struct stabentry {
  85     uint32_t    n_strx;
  86     uint8_t     n_type;
  87     uint8_t     n_other;
  88     uint16_t    n_desc;
  89     uint32_t    n_value;
  90 };
  91
  92 /* dwarf */
  93 #define sec_debug_aranges       (nsections-10)
  94 #define sec_rela_debug_aranges  (nsections-9)
  95 #define sec_debug_pubnames      (nsections-8)
  96 #define sec_debug_info          (nsections-7)
  97 #define sec_rela_debug_info     (nsections-6)
  98 #define sec_debug_abbrev        (nsections-5)
  99 #define sec_debug_line          (nsections-4)
 100 #define sec_rela_debug_line     (nsections-3)
 101 #define sec_debug_frame         (nsections-2)
 102 #define sec_debug_loc           (nsections-1)
 103
 104 void section_attrib(char *name, char *attr, int pass,
 105                     uint32_t *flags_and, uint32_t *flags_or,
 106                     uint64_t *align, int *type);
 107
 108 #define WRITE_STAB(p,n_strx,n_type,n_other,n_desc,n_value)  \
 109     do {                                                    \
 110         WRITELONG(p, n_strx);                               \
 111         WRITECHAR(p, n_type);                               \
 112         WRITECHAR(p, n_other);                              \
 113         WRITESHORT(p, n_desc);                              \
 114         WRITELONG(p, n_value);                              \
 115     } while (0)
 116
 117 #endif /* OUTPUT_OUTELF_H */