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/*
* 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 */
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