LXR qemu/linux-user/flat.h

   1/*
   2 * Copyright (C) 2002-2003  David McCullough <davidm@snapgear.com>
   3 * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   4 *                          The Silver Hammer Group, Ltd.
   5 *
   6 * This file provides the definitions and structures needed to
   7 * support uClinux flat-format executables.
   8 */
   9
  10#ifndef LINUX_USER_FLAT_H
  11#define LINUX_USER_FLAT_H
  12
  13#define FLAT_VERSION                    0x00000004L
  14
  15#ifdef CONFIG_BINFMT_SHARED_FLAT
  16#define MAX_SHARED_LIBS                 (4)
  17#else
  18#define MAX_SHARED_LIBS                 (1)
  19#endif
  20
  21/*
  22 * To make everything easier to port and manage cross platform
  23 * development,  all fields are in network byte order.
  24 */
  25
  26struct flat_hdr {
  27        char magic[4];
  28        abi_ulong rev;          /* version (as above) */
  29        abi_ulong entry;        /* Offset of first executable instruction
  30                                   with text segment from beginning of file */
  31        abi_ulong data_start;   /* Offset of data segment from beginning of
  32                                   file */
  33        abi_ulong data_end;     /* Offset of end of data segment
  34                                   from beginning of file */
  35        abi_ulong bss_end;      /* Offset of end of bss segment from beginning
  36                                   of file */
  37
  38        /* (It is assumed that data_end through bss_end forms the bss segment.) */
  39
  40        abi_ulong stack_size;   /* Size of stack, in bytes */
  41        abi_ulong reloc_start;  /* Offset of relocation records from
  42                                   beginning of file */
  43        abi_ulong reloc_count;  /* Number of relocation records */
  44        abi_ulong flags;
  45        abi_ulong build_date;   /* When the program/library was built */
  46        abi_ulong filler[5];    /* Reservered, set to zero */
  47};
  48
  49#define FLAT_FLAG_RAM    0x0001 /* load program entirely into RAM */
  50#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */
  51#define FLAT_FLAG_GZIP   0x0004 /* all but the header is compressed */
  52#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */
  53#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */
  54
  55
  56/*
  57 * While it would be nice to keep this header clean,  users of older
  58 * tools still need this support in the kernel.  So this section is
  59 * purely for compatibility with old tool chains.
  60 *
  61 * DO NOT make changes or enhancements to the old format please,  just work
  62 *        with the format above,  except to fix bugs with old format support.
  63 */
  64
  65#define OLD_FLAT_VERSION                        0x00000002L
  66#define OLD_FLAT_RELOC_TYPE_TEXT        0
  67#define OLD_FLAT_RELOC_TYPE_DATA        1
  68#define OLD_FLAT_RELOC_TYPE_BSS         2
  69
  70#       define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */
  71
  72#endif
  73