l4/pkg/valgrind/src/valgrind-3.6.0-svn/coregrind/l4re/myelf.h

   1 /*
   2  * This file is part of the Valgrind port to L4Re.
   3  *
   4  * (c) 2009-2010 Aaron Pohle <apohle@os.inf.tu-dresden.de>,
   5  *               Bjoern Doebel <doebel@os.inf.tu-dresden.de>
   6  *     economic rights: Technische Universitaet Dresden (Germany)
   7  */
   8 #pragma once
   9 #include <elf.h>
  10 #include <string.h>
  11
  12 #include "pub_core_basics.h"
  13 #include "pub_l4re.h"
  14 #include "pub_l4re_consts.h"
  15 #include "pub_tool_libcbase.h"
  16 #include "pub_core_libcprint.h"
  17
  18 typedef struct global
  19 {
  20         Elf32_Ehdr *elf_hdr;
  21         char       *section_string_table;
  22         char       *symbol_string_table;
  23         Elf32_Sym  *symbol_section;
  24         unsigned    symbol_section_size;
  25 } melf_global_elf_info;
  26
  27
  28 static inline void hexdump(void *a, unsigned num)
  29 {
  30         unsigned i = 0;
  31         for ( ; i < num; ++i) {
  32                 VG_(printf)("%02x ", *((unsigned char*)a + i));
  33         }
  34 }
  35
  36
  37 static inline int elf_check_magic(Elf32_Ehdr *e)
  38 {
  39         static const char elf_mag[4] = {ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3};
  40
  41         if (VG_(memcmp)(&e->e_ident, elf_mag, 4)) {
  42                 VG_(printf)("ident: "); hexdump(e, EI_NIDENT); VG_(printf)("\n");
  43                 VG_(printf)("header mismatch\n");
  44                 return 0;
  45         }
  46
  47         return 1;
  48 }
  49
  50
  51 static inline void print_Ehdr_info(Elf32_Ehdr* e)
  52 {
  53         VG_(printf)(" --- valid ELF file\n");
  54         VG_(printf)(" --- phoff: 0x%x\n", e->e_phoff);
  55         VG_(printf)(" --- phnum: %u\n", e->e_phnum);
  56         VG_(printf)(" --- shoff: 0x%x\n", e->e_shoff);
  57         VG_(printf)(" --- shnum: %u\n", e->e_shnum);
  58         VG_(printf)(" --- ehsize: 0x%x\n", e->e_ehsize);
  59         VG_(printf)(" --- string table section: %d\n", e->e_shstrndx);
  60 }
  61
  62 /*****************************************************************************
  63  *                            Section lookup                                 *
  64  *****************************************************************************/
  65
  66 /*
  67  * Locate the section containing section name strings.
  68  */
  69 int melf_locate_section_string_table(melf_global_elf_info *inf);
  70
  71 /*
  72  * Locate a section with a specific type.
  73  */
  74 Elf32_Shdr *melf_find_section_by_type(melf_global_elf_info *inf, unsigned type);
  75
  76 /*
  77  * Locate a section with a specific name.
  78  */
  79 Elf32_Shdr *melf_find_section_by_name(melf_global_elf_info *inf, char const *name);
  80
  81
  82 /*****************************************************************************
  83  *                            Symbol lookup                                  *
  84  *****************************************************************************/
  85
  86 /*
  87  * Find the address of a symbol with a given name
  88  */
  89 char *melf_find_symbol_by_name(melf_global_elf_info *elf, char *name);
  90
  91 /*
  92  * Display list of all symbols and their addresses
  93  */
  94 void melf_show_symbols(melf_global_elf_info *elf);
  95
  96 /*
  97  * Parse ELF file (mmap()ped to address a) and return a melf_global_elf_info
  98  * descriptor for it.
  99  */
 100 int melf_parse_elf(void *a, melf_global_elf_info *info);