gdb/testsuite/gdb.base/sym-file-loader.h

   1 /* Copyright 2013 Free Software Foundation, Inc.
   2    This program is free software; you can redistribute it and/or modify
   3    it under the terms of the GNU General Public License as published by
   4    the Free Software Foundation; either version 3 of the License, or
   5    (at your option) any later version.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14 */
  15
  16 #ifndef __SYM_FILE_LOADER__
  17 #define __SYM_FILE_LOADER__
  18
  19 #include <inttypes.h>
  20 #include <ansidecl.h>
  21 #include <elf/common.h>
  22 #include <elf/external.h>
  23
  24 #ifdef TARGET_LP64
  25
  26 typedef Elf64_External_Phdr Elf_External_Phdr;
  27 typedef Elf64_External_Ehdr Elf_External_Ehdr;
  28 typedef Elf64_External_Shdr Elf_External_Shdr;
  29 typedef Elf64_External_Sym Elf_External_Sym;
  30 typedef uint64_t Elf_Addr;
  31
  32 #elif defined TARGET_ILP32
  33
  34 typedef Elf32_External_Phdr Elf_External_Phdr;
  35 typedef Elf32_External_Ehdr Elf_External_Ehdr;
  36 typedef Elf32_External_Shdr Elf_External_Shdr;
  37 typedef Elf32_External_Sym Elf_External_Sym;
  38 typedef uint32_t Elf_Addr;
  39
  40 #endif
  41
  42 #define GET(hdr, field) (\
  43 sizeof ((hdr)->field) == 1 ? (uint64_t) (hdr)->field[0] : \
  44 sizeof ((hdr)->field) == 2 ? (uint64_t) *(uint16_t *) (hdr)->field : \
  45 sizeof ((hdr)->field) == 4 ? (uint64_t) *(uint32_t *) (hdr)->field : \
  46 sizeof ((hdr)->field) == 8 ? *(uint64_t *) (hdr)->field : \
  47 *(uint64_t *) NULL)
  48
  49 #define GETADDR(hdr, field) (\
  50 sizeof ((hdr)->field) == sizeof (Elf_Addr) ? *(Elf_Addr *) (hdr)->field : \
  51 *(Elf_Addr *) NULL)
  52
  53 struct segment
  54 {
  55   uint8_t *mapped_addr;
  56   Elf_External_Phdr *phdr;
  57   struct segment *next;
  58 };
  59
  60 /* Mini shared library loader.  No reallocation is performed
  61    for the sake of simplicity.  */
  62
  63 int
  64 load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
  65             struct segment **seg_out);
  66
  67 /* Return the section-header table.  */
  68
  69 Elf_External_Shdr *find_shdrtab (Elf_External_Ehdr *ehdr);
  70
  71 /* Return the string table of the section headers.  */
  72
  73 const char *find_shstrtab (Elf_External_Ehdr *ehdr, uint64_t *size);
  74
  75 /* Return the string table named SECTION.  */
  76
  77 const char *find_strtab (Elf_External_Ehdr *ehdr,
  78                          const char *section, uint64_t *strtab_size);
  79
  80 /* Return the section header named SECTION.  */
  81
  82 Elf_External_Shdr *find_shdr (Elf_External_Ehdr *ehdr, const char *section);
  83
  84 /* Return the symbol table.  */
  85
  86 Elf_External_Sym *find_symtab (Elf_External_Ehdr *ehdr,
  87                                uint64_t *symtab_size);
  88
  89 /* Translate a file offset to an address in a loaded segment.   */
  90
  91 int translate_offset (uint64_t file_offset, struct segment *seg, void **addr);
  92
  93 /* Lookup the address of FUNC.  */
  94
  95 int
  96 lookup_function (const char *func, Elf_External_Ehdr* ehdr,
  97                  struct segment *seg, void **addr);
  98
  99 #endif