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 #define EF_SIZE 180 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 irix-core). The file 19 * contents 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 */ 38 struct user { 39 unsigned long regs[EF_SIZE / /* integer and fp regs */ 40 sizeof(unsigned long) + 64]; 41 size_t u_tsize; /* text size (pages) */ 42 size_t u_dsize; /* data size (pages) */ 43 size_t u_ssize; /* stack size (pages) */ 44 unsigned long start_code; /* text starting address */ 45 unsigned long start_data; /* data starting address */ 46 unsigned long start_stack; /* stack starting address */ 47 long int signal; /* signal causing core dump */ 48 unsigned long u_ar0; /* help gdb find registers */ 49 unsigned long magic; /* identifies a core file */ 50 char u_comm[32]; /* user command name */ 51 }; 52 53 #define NBPG PAGE_SIZE 54 #define UPAGES 1 55 #define HOST_TEXT_START_ADDR (u.start_code) 56 #define HOST_DATA_START_ADDR (u.start_data) 57 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 58 59 #endif /* _ASM_USER_H */ 60
