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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 1995, 1996, 1999 by Ralf Baechle
7 */
8#ifndef _ASM_USER_H
9#define _ASM_USER_H
10
Atsushi Nemoto8f9a2b32006-09-07 01:00:22 +090011#ifdef __KERNEL__
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <asm/page.h>
14#include <asm/reg.h>
15
16/*
17 * Core file format: The core file is written in such a way that gdb
18 * can understand it and provide useful information to the user (under
19 * linux we use the `trad-core' bfd, NOT the irix-core). The file
20 * contents are as follows:
21 *
22 * upage: 1 page consisting of a user struct that tells gdb
23 * what is present in the file. Directly after this is a
24 * copy of the task_struct, which is currently not used by gdb,
25 * but it may come in handy at some point. All of the registers
26 * are stored as part of the upage. The upage should always be
27 * only one page long.
28 * data: The data segment follows next. We use current->end_text to
29 * current->brk to pick up all of the user variables, plus any memory
30 * that may have been sbrk'ed. No attempt is made to determine if a
31 * page is demand-zero or if a page is totally unused, we just cover
32 * the entire range. All of the addresses are rounded in such a way
33 * that an integral number of pages is written.
34 * stack: We need the stack information in order to get a meaningful
35 * backtrace. We need to write the data from usp to
36 * current->start_stack, so we round each of these in order to be able
37 * to write an integer number of pages.
38 */
39struct user {
40 unsigned long regs[EF_SIZE / /* integer and fp regs */
41 sizeof(unsigned long) + 64];
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
Atsushi Nemoto8f9a2b32006-09-07 01:00:22 +090060#endif /* __KERNEL__ */
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#endif /* _ASM_USER_H */