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