dlls/dbghelp/image_private.h

   1 /*
   2  * File elf_private.h - definitions for processing of ELF files
   3  *
   4  * Copyright (C) 1996, Eric Youngdale.
   5  *               1999-2007 Eric Pouech
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #ifdef HAVE_ELF_H
  23 # include <elf.h>
  24 #endif
  25 #ifdef HAVE_SYS_ELF32_H
  26 # include <sys/elf32.h>
  27 #endif
  28 #ifdef HAVE_SYS_EXEC_ELF_H
  29 # include <sys/exec_elf.h>
  30 #endif
  31 #if !defined(DT_NUM)
  32 # if defined(DT_COUNT)
  33 #  define DT_NUM DT_COUNT
  34 # else
  35 /* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */
  36 #  define DT_NUM 24
  37 # endif
  38 #endif
  39 #ifdef HAVE_LINK_H
  40 # include <link.h>
  41 #endif
  42 #ifdef HAVE_SYS_LINK_H
  43 # include <sys/link.h>
  44 #endif
  45
  46 #define IMAGE_NO_MAP  ((void*)-1)
  47
  48 #ifdef __ELF__
  49
  50 #ifdef _WIN64
  51 #define         Elf_Ehdr        Elf64_Ehdr
  52 #define         Elf_Shdr        Elf64_Shdr
  53 #define         Elf_Phdr        Elf64_Phdr
  54 #define         Elf_Dyn         Elf64_Dyn
  55 #define         Elf_Sym         Elf64_Sym
  56 #else
  57 #define         Elf_Ehdr        Elf32_Ehdr
  58 #define         Elf_Shdr        Elf32_Shdr
  59 #define         Elf_Phdr        Elf32_Phdr
  60 #define         Elf_Dyn         Elf32_Dyn
  61 #define         Elf_Sym         Elf32_Sym
  62 #endif
  63 #else
  64 #ifndef SHT_NULL
  65 #define SHT_NULL        0
  66 #endif
  67 #endif
  68
  69 /* structure holding information while handling an ELF image
  70  * allows one by one section mapping for memory savings
  71  */
  72 struct image_file_map
  73 {
  74     enum module_type            modtype;
  75     union
  76     {
  77         struct elf_file_map
  78         {
  79             size_t                      elf_size;
  80             size_t                      elf_start;
  81             int                         fd;
  82             const char*                 shstrtab;
  83             struct image_file_map*      alternate;      /* another ELF file (linked to this one) */
  84 #ifdef __ELF__
  85             Elf_Ehdr                    elfhdr;
  86             struct
  87             {
  88                 Elf_Shdr                        shdr;
  89                 const char*                     mapped;
  90             }*                          sect;
  91 #endif
  92         } elf;
  93         struct pe_file_map
  94         {
  95             HANDLE                      hMap;
  96             IMAGE_NT_HEADERS            ntheader;
  97             unsigned                    full_count;
  98             void*                       full_map;
  99             struct
 100             {
 101                 IMAGE_SECTION_HEADER            shdr;
 102                 const char*                     mapped;
 103             }*                          sect;
 104             const char*                 strtable;
 105         } pe;
 106     } u;
 107 };
 108
 109 struct image_section_map
 110 {
 111     struct image_file_map*      fmap;
 112     long                        sidx;
 113 };
 114
 115 extern BOOL         elf_find_section(struct image_file_map* fmap, const char* name,
 116                                      unsigned sht, struct image_section_map* ism);
 117 extern const char*  elf_map_section(struct image_section_map* ism);
 118 extern void         elf_unmap_section(struct image_section_map* ism);
 119 extern unsigned     elf_get_map_size(const struct image_section_map* ism);
 120
 121 extern BOOL         pe_find_section(struct image_file_map* fmap, const char* name,
 122                                     struct image_section_map* ism);
 123 extern const char*  pe_map_section(struct image_section_map* psm);
 124 extern void         pe_unmap_section(struct image_section_map* psm);
 125 extern unsigned     pe_get_map_size(const struct image_section_map* psm);
 126
 127 static inline BOOL image_find_section(struct image_file_map* fmap, const char* name,
 128                                       struct image_section_map* ism)
 129 {
 130     switch (fmap->modtype)
 131     {
 132     case DMT_ELF: return elf_find_section(fmap, name, SHT_NULL, ism);
 133     case DMT_PE:  return pe_find_section(fmap, name, ism);
 134     default: assert(0); return FALSE;
 135     }
 136 }
 137
 138 static inline const char* image_map_section(struct image_section_map* ism)
 139 {
 140     if (!ism->fmap) return NULL;
 141     switch (ism->fmap->modtype)
 142     {
 143     case DMT_ELF: return elf_map_section(ism);
 144     case DMT_PE:  return pe_map_section(ism);
 145     default: assert(0); return NULL;
 146     }
 147 }
 148
 149 static inline void image_unmap_section(struct image_section_map* ism)
 150 {
 151     if (!ism->fmap) return;
 152     switch (ism->fmap->modtype)
 153     {
 154     case DMT_ELF: elf_unmap_section(ism); break;
 155     case DMT_PE:  pe_unmap_section(ism);   break;
 156     default: assert(0); return;
 157     }
 158 }
 159
 160 static inline unsigned image_get_map_size(struct image_section_map* ism)
 161 {
 162     if (!ism->fmap) return 0;
 163     switch (ism->fmap->modtype)
 164     {
 165     case DMT_ELF: return elf_get_map_size(ism);
 166     case DMT_PE:  return pe_get_map_size(ism);
 167     default: assert(0); return 0;
 168     }
 169 }