1/* 2 * BK Id: SCCS/s.user.h 1.5 05/17/01 18:14:26 cort 3 */ 4#ifdef __KERNEL__ 5#ifndef _PPC_USER_H 6#define _PPC_USER_H 7 8/* Adapted from <asm-alpha/user.h> */ 9 10#include <linux/ptrace.h> 11#include <asm/page.h> 12 13/* 14 * Core file format: The core file is written in such a way that gdb 15 * can understand it and provide useful information to the user (under 16 * linux we use the `trad-core' bfd, NOT the osf-core). The file contents 17 * are as follows: 18 * 19 * upage: 1 page consisting of a user struct that tells gdb 20 * what is present in the file. Directly after this is a 21 * copy of the task_struct, which is currently not used by gdb, 22 * but it may come in handy at some point. All of the registers 23 * are stored as part of the upage. The upage should always be 24 * only one page long. 25 * data: The data segment follows next. We use current->end_text to 26 * current->brk to pick up all of the user variables, plus any memory 27 * that may have been sbrk'ed. No attempt is made to determine if a 28 * page is demand-zero or if a page is totally unused, we just cover 29 * the entire range. All of the addresses are rounded in such a way 30 * that an integral number of pages is written. 31 * stack: We need the stack information in order to get a meaningful 32 * backtrace. We need to write the data from usp to 33 * current->start_stack, so we round each of these in order to be able 34 * to write an integer number of pages. 35 */ 36struct user { 37 struct pt_regs regs; /* entire machine state */ 38 size_t u_tsize; /* text size (pages) */ 39 size_t u_dsize; /* data size (pages) */ 40 size_t u_ssize; /* stack size (pages) */ 41 unsigned long start_code; /* text starting address */ 42 unsigned long start_data; /* data starting address */ 43 unsigned long start_stack; /* stack starting address */ 44 long int signal; /* signal causing core dump */ 45 struct regs * u_ar0; /* help gdb find registers */ 46 unsigned long magic; /* identifies a core file */ 47 char u_comm[32]; /* user command name */ 48}; 49 50#define NBPG PAGE_SIZE 51#define UPAGES 1 52#define HOST_TEXT_START_ADDR (u.start_code) 53#define HOST_DATA_START_ADDR (u.start_data) 54#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 55 56#endif /* _PPC_USER_H */ 57#endif /* __KERNEL__ */ 58