| 1 | /* |
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| 2 | * This file is subject to the terms and conditions of the GNU General Public |
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| 3 | * License. See the file "COPYING" in the main directory of this archive |
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| 4 | * for more details. |
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| 5 | * |
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| 6 | * Copyright (C) 1994, 1995, 1996, 1999 by Ralf Baechle |
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| 7 | */ |
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| 8 | #ifndef _ASM_USER_H |
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| 9 | #define _ASM_USER_H |
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| 10 | |
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| 11 | #include <asm/page.h> |
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| 12 | |
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| 13 | /* |
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| 14 | * Core file format: The core file is written in such a way that gdb |
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| 15 | * can understand it and provide useful information to the user (under |
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| 16 | * linux we use the `trad-core' bfd, NOT the irix-core). The file |
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| 17 | * contents are as follows: |
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| 18 | * |
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| 19 | * upage: 1 page consisting of a user struct that tells gdb |
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| 20 | * what is present in the file. Directly after this is a |
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| 21 | * copy of the task_struct, which is currently not used by gdb, |
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| 22 | * but it may come in handy at some point. All of the registers |
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| 23 | * are stored as part of the upage. The upage should always be |
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| 24 | * only one page long. |
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| 25 | * data: The data segment follows next. We use current->end_text to |
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| 26 | * current->brk to pick up all of the user variables, plus any memory |
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| 27 | * that may have been sbrk'ed. No attempt is made to determine if a |
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| 28 | * page is demand-zero or if a page is totally unused, we just cover |
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| 29 | * the entire range. All of the addresses are rounded in such a way |
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| 30 | * that an integral number of pages is written. |
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| 31 | * stack: We need the stack information in order to get a meaningful |
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| 32 | * backtrace. We need to write the data from usp to |
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| 33 | * current->start_stack, so we round each of these in order to be able |
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| 34 | * to write an integer number of pages. |
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| 35 | */ |
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| 36 | struct user { |
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| 37 | unsigned long regs[EF_SIZE / /* integer and fp regs */ |
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| 38 | sizeof(unsigned long) + 64]; |
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| 39 | size_t u_tsize; /* text size (pages) */ |
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| 40 | size_t u_dsize; /* data size (pages) */ |
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| 41 | size_t u_ssize; /* stack size (pages) */ |
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| 42 | unsigned long start_code; /* text starting address */ |
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| 43 | unsigned long start_data; /* data starting address */ |
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| 44 | unsigned long start_stack; /* stack starting address */ |
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| 45 | long int signal; /* signal causing core dump */ |
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| 46 | struct regs * u_ar0; /* help gdb find registers */ |
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| 47 | unsigned long magic; /* identifies a core file */ |
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| 48 | char u_comm[32]; /* user command name */ |
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| 49 | }; |
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| 50 | |
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| 51 | #define NBPG PAGE_SIZE |
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| 52 | #define UPAGES 1 |
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| 53 | #define HOST_TEXT_START_ADDR (u.start_code) |
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| 54 | #define HOST_DATA_START_ADDR (u.start_data) |
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| 55 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) |
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| 56 | |
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| 57 | #endif /* _ASM_USER_H */ |
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