nbd: Add max-connections to nbd-server-start
[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 #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
26 struct 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]; /* Reserved, 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