kernel2/include/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 _ELF_H_
  20 #define _ELF_H_
  21
  22 #include <sys/types.h>
  23 #include <stdint.h>
  24 #include <memuser.h>
  25
  26 #define ET_NONE   0
  27 #define ET_REL    1
  28 #define ET_EXEC   2
  29 #define ET_DYN    3
  30 #define ET_CORE   4
  31 #define ET_LOPROC 0xff00
  32 #define ET_HIPROC 0xffff
  33 // Elf Header Machine
  34 #define EM_NONE  0
  35 #define EM_M32   1
  36 #define EM_SPARC 2
  37 #define EM_386   3
  38 #define EM_68K   4
  39 #define EM_88K   5
  40 #define EM_860   7
  41 #define EM_MIPS  8
  42 // Elf Header Version
  43 #define EV_NONE 0
  44 #define EV_CURRENT 1
  45 // Elf Header ident
  46 #define EI_MAG0          0
  47 #define EI_MAG1          1
  48 #define EI_MAG2          2
  49 #define EI_MAG3          3
  50 #define EI_CLASS         4
  51 #define EI_DATA          5
  52 #define EI_VERSION       6
  53 #define EI_PAD           7
  54 #define EI_NIDENT       16
  55 #define ELFMAG0       0x7f
  56 #define ELFMAG1        'E'
  57 #define ELFMAG2        'L'
  58 #define ELFMAG3        'F'
  59 #define ELFCLASSNONE     0
  60 #define ELFCLASS32       1
  61 #define ELFCLASS64       2
  62 #define ELFDATANONE      0
  63 #define ELFDATA2LSB      1
  64 #define ELFDATA2MSB      2
  65
  66 // Programm Header Type
  67 #define PT_NULL         0x00000000
  68 #define PT_LOAD         0x00000001
  69 #define PT_DYNAMIC      0x00000002
  70 #define PT_INTERP       0x00000003
  71 #define PT_NOTE         0x00000004
  72 #define PT_SHLIB        0x00000005
  73 #define PT_PHDR         0x00000006
  74 #define PT_LOPROC       0x70000000
  75 #define PT_HIPROC       0x7fffffff
  76 // unofficial
  77 #define PT_LOOS         0x60000000
  78 #define PT_HIOS         0x6fffffff
  79 #define PT_GNU_EH_FRAME 0x6474e550
  80 #define PT_GNU_STACK    (PT_LOOS+0x474e551)
  81
  82 // Programm Header Flag
  83 #define PF_X 0x1
  84 #define PF_W 0x2
  85 #define PF_R 0x4
  86
  87 typedef struct {
  88   uint8_t  ident[EI_NIDENT];
  89   uint16_t type;
  90   uint16_t machine;
  91   uint32_t version;
  92   uint32_t entry;
  93   uint32_t phoff;
  94   uint32_t shoff;
  95   uint32_t flags;
  96   uint16_t ehsize;
  97   uint16_t phentsize;
  98   uint16_t phnum;
  99   uint16_t shentsize;
 100   uint16_t shnum;
 101   uint16_t shstrndx;
 102 } __attribute__ ((packed)) elf_header_t;
 103
 104 typedef struct {
 105   uint32_t type;
 106   uint32_t offset;
 107   uint32_t vaddr;
 108   uint32_t paddr;
 109   uint32_t filesz;
 110   uint32_t memsz;
 111   uint32_t flags;
 112   uint32_t align;
 113 } __attribute__ ((packed)) elf_progheader_t;
 114
 115 int elf_validate(elf_header_t *header);
 116 int elf_loadseg(void *memaddr,size_t memsize,void *fileaddr,size_t filesize,addrspace_t *addrspace,int writable);
 117 void *elf_load(addrspace_t *addrspace,void *file,size_t filesize);
 118
 119 #endif