1 /* 2 * Copyright (C) 2004-2006 Atmel Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * Note: We may not need these definitions for AVR32, as we don't 9 * support a.out. 10 */ 11 #ifndef __ASM_AVR32_USER_H 12 #define __ASM_AVR32_USER_H 13 14 #include <linux/types.h> 15 #include <asm/ptrace.h> 16 #include <asm/page.h> 17 18 /* 19 * Core file format: The core file is written in such a way that gdb 20 * can understand it and provide useful information to the user (under 21 * linux we use the `trad-core' bfd). The file contents are as follows: 22 * 23 * upage: 1 page consisting of a user struct that tells gdb 24 * what is present in the file. Directly after this is a 25 * copy of the task_struct, which is currently not used by gdb, 26 * but it may come in handy at some point. All of the registers 27 * are stored as part of the upage. The upage should always be 28 * only one page long. 29 * data: The data segment follows next. We use current->end_text to 30 * current->brk to pick up all of the user variables, plus any memory 31 * that may have been sbrk'ed. No attempt is made to determine if a 32 * page is demand-zero or if a page is totally unused, we just cover 33 * the entire range. All of the addresses are rounded in such a way 34 * that an integral number of pages is written. 35 * stack: We need the stack information in order to get a meaningful 36 * backtrace. We need to write the data from usp to 37 * current->start_stack, so we round each of these in order to be able 38 * to write an integer number of pages. 39 */ 40 41 struct user_fpu_struct { 42 /* We have no FPU (yet) */ 43 }; 44 45 struct user { 46 struct pt_regs regs; /* entire machine state */ 47 size_t u_tsize; /* text size (pages) */ 48 size_t u_dsize; /* data size (pages) */ 49 size_t u_ssize; /* stack size (pages) */ 50 unsigned long start_code; /* text starting address */ 51 unsigned long start_data; /* data starting address */ 52 unsigned long start_stack; /* stack starting address */ 53 long int signal; /* signal causing core dump */ 54 unsigned long u_ar0; /* help gdb find registers */ 55 unsigned long magic; /* identifies a core file */ 56 char u_comm[32]; /* user command name */ 57 }; 58 59 #define NBPG PAGE_SIZE 60 #define UPAGES 1 61 #define HOST_TEXT_START_ADDR (u.start_code) 62 #define HOST_DATA_START_ADDR (u.start_data) 63 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 64 65 #endif /* __ASM_AVR32_USER_H */ 66