[linux-2.6-block.git] / arch / mips / include / asm / user.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994, 1995, 1996, 1999 by Ralf Baechle
 */
#ifndef _ASM_USER_H
#define _ASM_USER_H

#include <asm/page.h>
#include <asm/reg.h>

/*
 * Core file format: The core file is written in such a way that gdb
 * can understand it and provide useful information to the user (under
 * linux we use the `trad-core' bfd, NOT the irix-core).  The file
 * contents are as follows:
 *
 *  upage: 1 page consisting of a user struct that tells gdb
 *	what is present in the file.  Directly after this is a
 *	copy of the task_struct, which is currently not used by gdb,
 *	but it may come in handy at some point.	 All of the registers
 *	are stored as part of the upage.  The upage should always be
 *	only one page long.
 *  data: The data segment follows next.  We use current->end_text to
 *	current->brk to pick up all of the user variables, plus any memory
 *	that may have been sbrk'ed.  No attempt is made to determine if a
 *	page is demand-zero or if a page is totally unused, we just cover
 *	the entire range.  All of the addresses are rounded in such a way
 *	that an integral number of pages is written.
 *  stack: We need the stack information in order to get a meaningful
 *	backtrace.  We need to write the data from usp to
 *	current->start_stack, so we round each of these in order to be able
 *	to write an integer number of pages.
 */
struct user {
	unsigned long	regs[EF_SIZE /		/* integer and fp regs */
			sizeof(unsigned long) + 64];
	size_t		u_tsize;		/* text size (pages) */
	size_t		u_dsize;		/* data size (pages) */
	size_t		u_ssize;		/* stack size (pages) */
	unsigned long	start_code;		/* text starting address */
	unsigned long	start_data;		/* data starting address */
	unsigned long	start_stack;		/* stack starting address */
	long int	signal;			/* signal causing core dump */
	unsigned long	u_ar0;			/* help gdb find registers */
	unsigned long	magic;			/* identifies a core file */
	char		u_comm[32];		/* user command name */
};

#define NBPG			PAGE_SIZE
#define UPAGES			1
#define HOST_TEXT_START_ADDR	(u.start_code)
#define HOST_DATA_START_ADDR	(u.start_data)
#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)

#endif /* _ASM_USER_H */
Commit	Line	Data
1da177e4 LT	1	/*
	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
	11	#include <asm/page.h>
	12	#include <asm/reg.h>
	13
	14	/*
	15	* Core file format: The core file is written in such a way that gdb
	16	* can understand it and provide useful information to the user (under
	17	* linux we use the `trad-core' bfd, NOT the irix-core). The file
	18	* contents are as follows:
	19	*
	20	* upage: 1 page consisting of a user struct that tells gdb
	21	* what is present in the file. Directly after this is a
	22	* copy of the task_struct, which is currently not used by gdb,
70342287	23	* but it may come in handy at some point. All of the registers
1da177e4 LT	24	* are stored as part of the upage. The upage should always be
	25	* only one page long.
	26	* data: The data segment follows next. We use current->end_text to
	27	* current->brk to pick up all of the user variables, plus any memory
	28	* that may have been sbrk'ed. No attempt is made to determine if a
	29	* page is demand-zero or if a page is totally unused, we just cover
	30	* the entire range. All of the addresses are rounded in such a way
	31	* that an integral number of pages is written.
	32	* stack: We need the stack information in order to get a meaningful
	33	* backtrace. We need to write the data from usp to
	34	* current->start_stack, so we round each of these in order to be able
	35	* to write an integer number of pages.
	36	*/
	37	struct user {
	38	unsigned long regs[EF_SIZE / /* integer and fp regs */
	39	sizeof(unsigned long) + 64];
	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 */
6e16d89b	47	unsigned long u_ar0; /* help gdb find registers */
1da177e4 LT	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 /* _ASM_USER_H */