projects / linux-block.git / blame
| 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 | ||
| 8f9a2b32 AN |
11 | #ifdef __KERNEL__ |
| 12 | ||
| 1da177e4 LT |
13 | #include <asm/page.h> |
| 14 | #include <asm/reg.h> | |
| 15 | ||
| 16 | /* | |
| 17 | * Core file format: The core file is written in such a way that gdb | |
| 18 | * can understand it and provide useful information to the user (under | |
| 19 | * linux we use the `trad-core' bfd, NOT the irix-core). The file | |
| 20 | * contents are as follows: | |
| 21 | * | |
| 22 | * upage: 1 page consisting of a user struct that tells gdb | |
| 23 | * what is present in the file. Directly after this is a | |
| 24 | * copy of the task_struct, which is currently not used by gdb, | |
| 25 | * but it may come in handy at some point. All of the registers | |
| 26 | * are stored as part of the upage. The upage should always be | |
| 27 | * only one page long. | |
| 28 | * data: The data segment follows next. We use current->end_text to | |
| 29 | * current->brk to pick up all of the user variables, plus any memory | |
| 30 | * that may have been sbrk'ed. No attempt is made to determine if a | |
| 31 | * page is demand-zero or if a page is totally unused, we just cover | |
| 32 | * the entire range. All of the addresses are rounded in such a way | |
| 33 | * that an integral number of pages is written. | |
| 34 | * stack: We need the stack information in order to get a meaningful | |
| 35 | * backtrace. We need to write the data from usp to | |
| 36 | * current->start_stack, so we round each of these in order to be able | |
| 37 | * to write an integer number of pages. | |
| 38 | */ | |
| 39 | struct user { | |
| 40 | unsigned long regs[EF_SIZE / /* integer and fp regs */ | |
| 41 | sizeof(unsigned long) + 64]; | |
| 42 | size_t u_tsize; /* text size (pages) */ | |
| 43 | size_t u_dsize; /* data size (pages) */ | |
| 44 | size_t u_ssize; /* stack size (pages) */ | |
| 45 | unsigned long start_code; /* text starting address */ | |
| 46 | unsigned long start_data; /* data starting address */ | |
| 47 | unsigned long start_stack; /* stack starting address */ | |
| 48 | long int signal; /* signal causing core dump */ | |
| 49 | struct regs * u_ar0; /* help gdb find registers */ | |
| 50 | unsigned long magic; /* identifies a core file */ | |
| 51 | char u_comm[32]; /* user command name */ | |
| 52 | }; | |
| 53 | ||
| 54 | #define NBPG PAGE_SIZE | |
| 55 | #define UPAGES 1 | |
| 56 | #define HOST_TEXT_START_ADDR (u.start_code) | |
| 57 | #define HOST_DATA_START_ADDR (u.start_data) | |
| 58 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) | |
| 59 | ||
| 8f9a2b32 AN |
60 | #endif /* __KERNEL__ */ |
| 61 | ||
| 1da177e4 | 62 | #endif /* _ASM_USER_H */ |