1 /* $Id$
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (C) 1994, 1995, 1996, 1999 by Ralf Baechle
8 */
9 #ifndef _ASM_USER_H
10 #define _ASM_USER_H
11
12 #include <linux/ptrace.h>
13
14 #include <asm/page.h>
15 #include <asm/reg.h>
16
17 /*
18 * Core file format: The core file is written in such a way that gdb
19 * can understand it and provide useful information to the user (under
20 * linux we use the `trad-core' bfd, NOT the irix-core). The file
21 * contents are as follows:
22 *
23 * upage: 1 page consisting of a user struct that tells gdb
24 * what is present in the file. Directly after this is a
25 * copy of the task_struct, which is currently not used by gdb,
26 * but it may come in handy at some point. All of the registers
27 * are stored as part of the upage. The upage should always be
28 * only one page long.
29 * data: The data segment follows next. We use current->end_text to
30 * current->brk to pick up all of the user variables, plus any memory
31 * that may have been sbrk'ed. No attempt is made to determine if a
32 * page is demand-zero or if a page is totally unused, we just cover
33 * the entire range. All of the addresses are rounded in such a way
34 * that an integral number of pages is written.
35 * stack: We need the stack information in order to get a meaningful
36 * backtrace. We need to write the data from usp to
37 * current->start_stack, so we round each of these in order to be able
38 * to write an integer number of pages.
39 */
40 struct user {
41 unsigned long regs[EF_SIZE/4+64]; /* integer and fp regs */
42 size_t u_tsize; /* text size (pages) */
43 size_t u_dsize; /* data size (pages) */
44 size_t u_ssize; /* stack size (pages) */
45 unsigned long start_code; /* text starting address */
46 unsigned long start_data; /* data starting address */
47 unsigned long start_stack; /* stack starting address */
48 long int signal; /* signal causing core dump */
49 struct regs * u_ar0; /* help gdb find registers */
50 unsigned long magic; /* identifies a core file */
51 char u_comm[32]; /* user command name */
52 };
53
54 #define NBPG PAGE_SIZE
55 #define UPAGES 1
56 #define HOST_TEXT_START_ADDR (u.start_code)
57 #define HOST_DATA_START_ADDR (u.start_data)
58 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
59
60 #endif /* _ASM_USER_H */
61
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