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