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 #define         Elf_auxv_t      Elf64_auxv_t
  57 #else
  58 #define         Elf_Ehdr        Elf32_Ehdr
  59 #define         Elf_Shdr        Elf32_Shdr
  60 #define         Elf_Phdr        Elf32_Phdr
  61 #define         Elf_Dyn         Elf32_Dyn
  62 #define         Elf_Sym         Elf32_Sym
  63 #define         Elf_auxv_t      Elf32_auxv_t
  64 #endif
  65 #else
  66 #ifndef SHT_NULL
  67 #define SHT_NULL        0
  68 #endif
  69 #endif
  70
  71 /* structure holding information while handling an ELF image
  72  * allows one by one section mapping for memory savings
  73  */
  74 struct image_file_map
  75 {
  76     enum module_type            modtype;
  77     union
  78     {
  79         struct elf_file_map
  80         {
  81             size_t                      elf_size;
  82             size_t                      elf_start;
  83             int                         fd;
  84             const char*                 shstrtab;
  85             struct image_file_map*      alternate;      /* another ELF file (linked to this one) */
  86             char*                       target_copy;
  87 #ifdef __ELF__
  88             Elf_Ehdr                    elfhdr;
  89             struct
  90             {
  91                 Elf_Shdr                        shdr;
  92                 const char*                     mapped;
  93             }*                          sect;
  94 #endif
  95         } elf;
  96         struct pe_file_map
  97         {
  98             HANDLE                      hMap;
  99             IMAGE_NT_HEADERS            ntheader;
 100             unsigned                    full_count;
 101             void*                       full_map;
 102             struct
 103             {
 104                 IMAGE_SECTION_HEADER            shdr;
 105                 const char*                     mapped;
 106             }*                          sect;
 107             const char*                 strtable;
 108         } pe;
 109     } u;
 110 };
 111
 112 struct image_section_map
 113 {
 114     struct image_file_map*      fmap;
 115     long                        sidx;
 116 };
 117
 118 extern BOOL         elf_find_section(struct image_file_map* fmap, const char* name,
 119                                      unsigned sht, struct image_section_map* ism) DECLSPEC_HIDDEN;
 120 extern const char*  elf_map_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
 121 extern void         elf_unmap_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
 122 extern DWORD_PTR    elf_get_map_rva(const struct image_section_map* ism) DECLSPEC_HIDDEN;
 123 extern unsigned     elf_get_map_size(const struct image_section_map* ism) DECLSPEC_HIDDEN;
 124
 125 extern BOOL         pe_find_section(struct image_file_map* fmap, const char* name,
 126                                     struct image_section_map* ism) DECLSPEC_HIDDEN;
 127 extern const char*  pe_map_section(struct image_section_map* psm) DECLSPEC_HIDDEN;
 128 extern void         pe_unmap_section(struct image_section_map* psm) DECLSPEC_HIDDEN;
 129 extern DWORD_PTR    pe_get_map_rva(const struct image_section_map* psm) DECLSPEC_HIDDEN;
 130 extern unsigned     pe_get_map_size(const struct image_section_map* psm) DECLSPEC_HIDDEN;
 131
 132 static inline BOOL image_find_section(struct image_file_map* fmap, const char* name,
 133                                       struct image_section_map* ism)
 134 {
 135     switch (fmap->modtype)
 136     {
 137     case DMT_ELF: return elf_find_section(fmap, name, SHT_NULL, ism);
 138     case DMT_PE:  return pe_find_section(fmap, name, ism);
 139     default: assert(0); return FALSE;
 140     }
 141 }
 142
 143 static inline const char* image_map_section(struct image_section_map* ism)
 144 {
 145     if (!ism->fmap) return NULL;
 146     switch (ism->fmap->modtype)
 147     {
 148     case DMT_ELF: return elf_map_section(ism);
 149     case DMT_PE:  return pe_map_section(ism);
 150     default: assert(0); return NULL;
 151     }
 152 }
 153
 154 static inline void image_unmap_section(struct image_section_map* ism)
 155 {
 156     if (!ism->fmap) return;
 157     switch (ism->fmap->modtype)
 158     {
 159     case DMT_ELF: elf_unmap_section(ism); break;
 160     case DMT_PE:  pe_unmap_section(ism);   break;
 161     default: assert(0); return;
 162     }
 163 }
 164
 165 static inline DWORD_PTR image_get_map_rva(const struct image_section_map* ism)
 166 {
 167     if (!ism->fmap) return 0;
 168     switch (ism->fmap->modtype)
 169     {
 170     case DMT_ELF: return elf_get_map_rva(ism);
 171     case DMT_PE:  return pe_get_map_rva(ism);
 172     default: assert(0); return 0;
 173     }
 174 }
 175
 176 static inline unsigned image_get_map_size(const struct image_section_map* ism)
 177 {
 178     if (!ism->fmap) return 0;
 179     switch (ism->fmap->modtype)
 180     {
 181     case DMT_ELF: return elf_get_map_size(ism);
 182     case DMT_PE:  return pe_get_map_size(ism);
 183     default: assert(0); return 0;
 184     }
 185 }