| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
| 23 | * but it may come in handy at some point. All of the registers |
| 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 */ |
| 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 /* _ASM_USER_H */ |