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