| 1 | /* |
| 2 | * arch/ubicom32/include/asm/user.h |
| 3 | * Ubicom32 architecture core file definitions. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _ASM_UBICOM32_USER_H |
| 29 | #define _ASM_UBICOM32_USER_H |
| 30 | |
| 31 | #include <asm/ptrace.h> |
| 32 | #include <asm/page.h> |
| 33 | /* |
| 34 | * Adapted from <asm-powerpc/user.h> |
| 35 | * |
| 36 | * Core file format: The core file is written in such a way that gdb |
| 37 | * can understand it and provide useful information to the user (under |
| 38 | * linux we use the `trad-core' bfd, NOT the osf-core). The file contents |
| 39 | * are as follows: |
| 40 | * |
| 41 | * upage: 1 page consisting of a user struct that tells gdb |
| 42 | * what is present in the file. Directly after this is a |
| 43 | * copy of the task_struct, which is currently not used by gdb, |
| 44 | * but it may come in handy at some point. All of the registers |
| 45 | * are stored as part of the upage. The upage should always be |
| 46 | * only one page long. |
| 47 | * data: The data segment follows next. We use current->end_text to |
| 48 | * current->brk to pick up all of the user variables, plus any memory |
| 49 | * that may have been sbrk'ed. No attempt is made to determine if a |
| 50 | * page is demand-zero or if a page is totally unused, we just cover |
| 51 | * the entire range. All of the addresses are rounded in such a way |
| 52 | * that an integral number of pages is written. |
| 53 | * stack: We need the stack information in order to get a meaningful |
| 54 | * backtrace. We need to write the data from usp to |
| 55 | * current->start_stack, so we round each of these in order to be able |
| 56 | * to write an integer number of pages. |
| 57 | */ |
| 58 | |
| 59 | struct user_ubicom32fp_struct { |
| 60 | }; |
| 61 | |
| 62 | struct user { |
| 63 | struct pt_regs regs; /* entire machine state */ |
| 64 | size_t u_tsize; /* text size (pages) */ |
| 65 | size_t u_dsize; /* data size (pages) */ |
| 66 | size_t u_ssize; /* stack size (pages) */ |
| 67 | unsigned long start_code; /* text starting address */ |
| 68 | unsigned long start_data; /* data starting address */ |
| 69 | unsigned long start_stack; /* stack starting address */ |
| 70 | long int signal; /* signal causing core dump */ |
| 71 | unsigned long u_ar0; /* help gdb find registers */ |
| 72 | unsigned long magic; /* identifies a core file */ |
| 73 | char u_comm[32]; /* user command name */ |
| 74 | }; |
| 75 | |
| 76 | #define NBPG PAGE_SIZE |
| 77 | #define UPAGES 1 |
| 78 | #define HOST_TEXT_START_ADDR (u.start_code) |
| 79 | #define HOST_DATA_START_ADDR (u.start_data) |
| 80 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) |
| 81 | |
| 82 | #endif /* _ASM_UBICOM32_USER_H */ |
| 83 | |
