linux-user: add SO_PEERCRED support for getsockopt
[qemu.git] / 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
23 struct 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 */