1/*
2 * BK Id: SCCS/s.user.h 1.5 05/17/01 18:14:26 cort
3 */
4#ifdef __KERNEL__
5#ifndef _PPC_USER_H
6#define _PPC_USER_H
7
8/* Adapted from <asm-alpha/user.h> */
9
10#include <linux/ptrace.h>
11#include <asm/page.h>
12
13/*
14 * Core file format: The core file is written in such a way that gdb
15 * can understand it and provide useful information to the user (under
16 * linux we use the `trad-core' bfd, NOT the osf-core).  The file contents
17 * are as follows:
18 *
19 *  upage: 1 page consisting of a user struct that tells gdb
20 *	what is present in the file.  Directly after this is a
21 *	copy of the task_struct, which is currently not used by gdb,
22 *	but it may come in handy at some point.  All of the registers
23 *	are stored as part of the upage.  The upage should always be
24 *	only one page long.
25 *  data: The data segment follows next.  We use current->end_text to
26 *	current->brk to pick up all of the user variables, plus any memory
27 *	that may have been sbrk'ed.  No attempt is made to determine if a
28 *	page is demand-zero or if a page is totally unused, we just cover
29 *	the entire range.  All of the addresses are rounded in such a way
30 *	that an integral number of pages is written.
31 *  stack: We need the stack information in order to get a meaningful
32 *	backtrace.  We need to write the data from usp to
33 *	current->start_stack, so we round each of these in order to be able
34 *	to write an integer number of pages.
35 */
36struct user {
37	struct pt_regs	regs;			/* entire machine state */
38	size_t		u_tsize;		/* text size (pages) */
39	size_t		u_dsize;		/* data size (pages) */
40	size_t		u_ssize;		/* stack size (pages) */
41	unsigned long	start_code;		/* text starting address */
42	unsigned long	start_data;		/* data starting address */
43	unsigned long	start_stack;		/* stack starting address */
44	long int	signal;			/* signal causing core dump */
45	struct regs *	u_ar0;			/* help gdb find registers */
46	unsigned long	magic;			/* identifies a core file */
47	char		u_comm[32];		/* user command name */
48};
49
50#define NBPG			PAGE_SIZE
51#define UPAGES			1
52#define HOST_TEXT_START_ADDR	(u.start_code)
53#define HOST_DATA_START_ADDR	(u.start_data)
54#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)
55
56#endif /* _PPC_USER_H */
57#endif /* __KERNEL__ */
58