apps/init/exe_elf.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _EXE_ELF_H_
  20 #define _EXE_ELF_H_
  21
  22 #include <stdint.h>
  23
  24 #define ET_NONE   0
  25 #define ET_REL    1
  26 #define ET_EXEC   2
  27 #define ET_DYN    3
  28 #define ET_CORE   4
  29 #define ET_LOPROC 0xff00
  30 #define ET_HIPROC 0xffff
  31 // Elf Header Machine
  32 #define EM_NONE  0
  33 #define EM_M32   1
  34 #define EM_SPARC 2
  35 #define EM_386   3
  36 #define EM_68K   4
  37 #define EM_88K   5
  38 #define EM_860   7
  39 #define EM_MIPS  8
  40 // Elf Header Version
  41 #define EV_NONE 0
  42 #define EV_CURRENT 1
  43 // Elf Header ident
  44 #define EI_MAG0          0
  45 #define EI_MAG1          1
  46 #define EI_MAG2          2
  47 #define EI_MAG3          3
  48 #define EI_CLASS         4
  49 #define EI_DATA          5
  50 #define EI_VERSION       6
  51 #define EI_PAD           7
  52 #define EI_NIDENT       16
  53 #define ELFMAG0       0x7f
  54 #define ELFMAG1        'E'
  55 #define ELFMAG2        'L'
  56 #define ELFMAG3        'F'
  57 #define ELFCLASSNONE     0
  58 #define ELFCLASS32       1
  59 #define ELFCLASS64       2
  60 #define ELFDATANONE      0
  61 #define ELFDATA2LSB      1
  62 #define ELFDATA2MSB      2
  63
  64 // Programm Header Type
  65 #define PT_NULL         0x00000000
  66 #define PT_LOAD         0x00000001
  67 #define PT_DYNAMIC      0x00000002
  68 #define PT_INTERP       0x00000003
  69 #define PT_NOTE         0x00000004
  70 #define PT_SHLIB        0x00000005
  71 #define PT_PHDR         0x00000006
  72 #define PT_LOPROC       0x70000000
  73 #define PT_HIPROC       0x7fffffff
  74 // unofficial
  75 #define PT_LOOS         0x60000000
  76 #define PT_HIOS         0x6fffffff
  77 #define PT_GNU_EH_FRAME 0x6474e550
  78 #define PT_GNU_STACK    (PT_LOOS+0x474e551)
  79
  80 // Programm Header Flag
  81 #define PF_X 0x1
  82 #define PF_W 0x2
  83 #define PF_R 0x4
  84
  85 typedef struct {
  86   uint8_t  ident[EI_NIDENT];
  87   uint16_t type;
  88   uint16_t machine;
  89   uint32_t version;
  90   uint32_t entry;
  91   uint32_t phoff;
  92   uint32_t shoff;
  93   uint32_t flags;
  94   uint16_t ehsize;
  95   uint16_t phentsize;
  96   uint16_t phnum;
  97   uint16_t shentsize;
  98   uint16_t shnum;
  99   uint16_t shstrndx;
 100 } __attribute__ ((packed)) elf_header_t;
 101
 102 typedef struct {
 103   uint32_t type;
 104   uint32_t offset;
 105   uint32_t vaddr;
 106   uint32_t paddr;
 107   uint32_t filesz;
 108   uint32_t memsz;
 109   uint32_t flags;
 110   uint32_t align;
 111 } __attribute__ ((packed)) elf_progheader_t;
 112
 113 typedef struct {
 114   elf_header_t header;
 115   int fh;
 116 } elf_t;
 117
 118 elf_t *elf_create(const char *file);
 119 void elf_destroy(elf_t *elf);
 120 void *elf_load(elf_t *elf,pid_t pid);
 121
 122 #endif /* _EXE_ELF_H_ */