1#ifndef _PPC_USER_H 2#define _PPC_USER_H 3 4/* Adapted from <asm-alpha/user.h> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12#include <linux/ptrace.h> 13#include <asm/page.h> 14 15/* 16 * Core file format: The core file is written in such a way that gdb 17 * can understand it and provide useful information to the user (under 18 * linux we use the `trad-core' bfd, NOT the osf-core). The file contents 19 * are as follows: 20 * 21 * upage: 1 page consisting of a user struct that tells gdb 22 * what is present in the file. Directly after this is a 23 * copy of the task_struct, which is currently not used by gdb, 24 * but it may come in handy at some point. All of the registers 25 * are stored as part of the upage. The upage should always be 26 * only one page long. 27 * data: The data segment follows next. We use current->end_text to 28 * current->brk to pick up all of the user variables, plus any memory 29 * that may have been sbrk'ed. No attempt is made to determine if a 30 * page is demand-zero or if a page is totally unused, we just cover 31 * the entire range. All of the addresses are rounded in such a way 32 * that an integral number of pages is written. 33 * stack: We need the stack information in order to get a meaningful 34 * backtrace. We need to write the data from usp to 35 * current->start_stack, so we round each of these in order to be able 36 * to write an integer number of pages. 37 */ 38struct user { 39 struct pt_regs regs; /* entire machine state */ 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 /* _PPC_USER_H */ 59