LXR linux/include/asm-sh64/user.h

   1#ifndef __ASM_SH64_USER_H
   2#define __ASM_SH64_USER_H
   3
   4/*
   5 * This file is subject to the terms and conditions of the GNU General Public
   6 * License.  See the file "COPYING" in the main directory of this archive
   7 * for more details.
   8 *
   9 * include/asm-sh64/user.h
  10 *
  11 * Copyright (C) 2000, 2001  Paolo Alberelli
  12 *
  13 */
  14
  15#include <linux/types.h>
  16#include <asm/ptrace.h>
  17#include <asm/page.h>
  18
  19/*
  20 * Core file format: The core file is written in such a way that gdb
  21 * can understand it and provide useful information to the user (under
  22 * linux we use the `trad-core' bfd).  The file contents are as follows:
  23 *
  24 *  upage: 1 page consisting of a user struct that tells gdb
  25 *      what is present in the file.  Directly after this is a
  26 *      copy of the task_struct, which is currently not used by gdb,
  27 *      but it may come in handy at some point.  All of the registers
  28 *      are stored as part of the upage.  The upage should always be
  29 *      only one page long.
  30 *  data: The data segment follows next.  We use current->end_text to
  31 *      current->brk to pick up all of the user variables, plus any memory
  32 *      that may have been sbrk'ed.  No attempt is made to determine if a
  33 *      page is demand-zero or if a page is totally unused, we just cover
  34 *      the entire range.  All of the addresses are rounded in such a way
  35 *      that an integral number of pages is written.
  36 *  stack: We need the stack information in order to get a meaningful
  37 *      backtrace.  We need to write the data from usp to
  38 *      current->start_stack, so we round each of these in order to be able
  39 *      to write an integer number of pages.
  40 */
  41
  42struct user_fpu_struct {
  43        unsigned long long fp_regs[32];
  44        unsigned int fpscr;
  45};
  46
  47struct user {
  48        struct pt_regs  regs;                   /* entire machine state */
  49        struct user_fpu_struct fpu;     /* Math Co-processor registers  */
  50        int u_fpvalid;          /* True if math co-processor being used */
  51        size_t          u_tsize;                /* text size (pages) */
  52        size_t          u_dsize;                /* data size (pages) */
  53        size_t          u_ssize;                /* stack size (pages) */
  54        unsigned long   start_code;             /* text starting address */
  55        unsigned long   start_data;             /* data starting address */
  56        unsigned long   start_stack;            /* stack starting address */
  57        long int        signal;                 /* signal causing core dump */
  58        struct regs *   u_ar0;                  /* help gdb find registers */
  59        struct user_fpu_struct* u_fpstate;      /* Math Co-processor pointer */
  60        unsigned long   magic;                  /* identifies a core file */
  61        char            u_comm[32];             /* user command name */
  62};
  63
  64#define NBPG                    PAGE_SIZE
  65#define UPAGES                  1
  66#define HOST_TEXT_START_ADDR    (u.start_code)
  67#define HOST_DATA_START_ADDR    (u.start_data)
  68#define HOST_STACK_END_ADDR     (u.start_stack + u.u_ssize * NBPG)
  69
  70#endif /* __ASM_SH64_USER_H */
  71