arch/avr32/include/asm/user.h

   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 */