include/uapi/linux/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 _UAPI_LINUX_FLAT_H
  11 #define _UAPI_LINUX_FLAT_H
  12
  13
  14 #define FLAT_VERSION                    0x00000004L
  15
  16 #ifdef CONFIG_BINFMT_SHARED_FLAT
  17 #define MAX_SHARED_LIBS                 (4)
  18 #else
  19 #define MAX_SHARED_LIBS                 (1)
  20 #endif
  21
  22 /*
  23  * To make everything easier to port and manage cross platform
  24  * development,  all fields are in network byte order.
  25  */
  26
  27 struct flat_hdr {
  28         char magic[4];
  29         unsigned long rev;          /* version (as above) */
  30         unsigned long entry;        /* Offset of first executable instruction
  31                                        with text segment from beginning of file */
  32         unsigned long data_start;   /* Offset of data segment from beginning of
  33                                        file */
  34         unsigned long data_end;     /* Offset of end of data segment
  35                                        from beginning of file */
  36         unsigned long bss_end;      /* Offset of end of bss segment from beginning
  37                                        of file */
  38
  39         /* (It is assumed that data_end through bss_end forms the bss segment.) */
  40
  41         unsigned long stack_size;   /* Size of stack, in bytes */
  42         unsigned long reloc_start;  /* Offset of relocation records from
  43                                        beginning of file */
  44         unsigned long reloc_count;  /* Number of relocation records */
  45         unsigned long flags;
  46         unsigned long build_date;   /* When the program/library was built */
  47         unsigned long filler[5];    /* Reservered, set to zero */
  48 };
  49
  50 #define FLAT_FLAG_RAM    0x0001 /* load program entirely into RAM */
  51 #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */
  52 #define FLAT_FLAG_GZIP   0x0004 /* all but the header is compressed */
  53 #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */
  54 #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */
  55
  56
  57
  58 #endif /* _UAPI_LINUX_FLAT_H */