boot/x86/stage3/elf.h

   1 #ifndef BOOT_X86_ELF_H
   2 #define BOOT_X86_ELF_H
   3
   4 #include <stdint.h>
   5
   6 /* Some constants we will test against. */
   7 #define ELF_MAGIC 0x464c457f
   8 #define ELF_32BIT 0x1
   9 #define ELF_LITTLE_ENDIAN 0x1
  10 #define ELF_SYSV_ABI 0x0
  11 #define ELF_TYPE_EXECUTABLE 0x2
  12 #define ELF_X86_ISA 0x3
  13
  14 #define ELF_PT_LOAD 0x1
  15
  16 #define ELF_FLAG_EXECUTABLE 0x1
  17 #define ELF_FLAG_WRITABLE 0x2
  18 #define ELF_FLAG_READABLE 0x4
  19
  20 /* Return error codes for the functions. */
  21 #define ELF_HEADER_INVALID 5
  22 #define MISMATCHED_SYSTEM 6
  23 #define NOT_EXECUTABLE 7
  24
  25 struct elf_header {
  26         uint32_t magic;
  27         uint8_t bits;
  28         uint8_t endianness;
  29         uint8_t header_ver; /* always 1 */
  30         uint8_t os_abi;
  31         uint8_t padding[8];
  32         uint16_t type;
  33         uint16_t machine;
  34         uint32_t elf_ver; /* always 1 */
  35         void (*entry)(void *, int);
  36         uint32_t program_hdr; /* offset into file */
  37         uint32_t section_hdr;
  38         uint32_t flags;
  39         uint16_t hdr_size;
  40         uint16_t ph_entry_size;
  41         uint16_t ph_entry_count;
  42         uint16_t sh_entry_size;
  43         uint16_t sh_entry_count;
  44         uint16_t sh_name_index;
  45 };
  46
  47 struct program_header {
  48         uint32_t seg_type;
  49         uint32_t file_offset;
  50         void *vaddr;
  51         uint32_t undefined;
  52         uint32_t filesz;
  53         uint32_t memsz;
  54         uint32_t flags;
  55         uint32_t align;
  56 };
  57
  58 extern int execute_elf(struct elf_header *header, void *arg1, int arg2);
  59
  60 #endif