LXR linux/arch/sh/include/asm/user.h

   1#ifndef __ASM_SH_USER_H
   2#define __ASM_SH_USER_H
   3
   4#include <asm/ptrace.h>
   5#include <asm/page.h>
   6
   7/*
   8 * Core file format: The core file is written in such a way that gdb
   9 * can understand it and provide useful information to the user (under
  10 * linux we use the `trad-core' bfd).  The file contents are as follows:
  11 *
  12 *  upage: 1 page consisting of a user struct that tells gdb
  13 *      what is present in the file.  Directly after this is a
  14 *      copy of the task_struct, which is currently not used by gdb,
  15 *      but it may come in handy at some point.  All of the registers
  16 *      are stored as part of the upage.  The upage should always be
  17 *      only one page long.
  18 *  data: The data segment follows next.  We use current->end_text to
  19 *      current->brk to pick up all of the user variables, plus any memory
  20 *      that may have been sbrk'ed.  No attempt is made to determine if a
  21 *      page is demand-zero or if a page is totally unused, we just cover
  22 *      the entire range.  All of the addresses are rounded in such a way
  23 *      that an integral number of pages is written.
  24 *  stack: We need the stack information in order to get a meaningful
  25 *      backtrace.  We need to write the data from usp to
  26 *      current->start_stack, so we round each of these in order to be able
  27 *      to write an integer number of pages.
  28 */
  29
  30#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
  31struct user_fpu_struct {
  32        unsigned long fp_regs[32];
  33        unsigned int fpscr;
  34};
  35#else
  36struct user_fpu_struct {
  37        unsigned long fp_regs[16];
  38        unsigned long xfp_regs[16];
  39        unsigned long fpscr;
  40        unsigned long fpul;
  41};
  42#endif
  43
  44struct user {
  45        struct pt_regs  regs;                   /* entire machine state */
  46        struct user_fpu_struct fpu;     /* Math Co-processor registers  */
  47        int u_fpvalid;          /* True if math co-processor being used */
  48        size_t          u_tsize;                /* text size (pages) */
  49        size_t          u_dsize;                /* data size (pages) */
  50        size_t          u_ssize;                /* stack size (pages) */
  51        unsigned long   start_code;             /* text starting address */
  52        unsigned long   start_data;             /* data starting address */
  53        unsigned long   start_stack;            /* stack starting address */
  54        long int        signal;                 /* signal causing core dump */
  55        unsigned long   u_ar0;                  /* help gdb find registers */
  56        struct user_fpu_struct* u_fpstate;      /* Math Co-processor pointer */
  57        unsigned long   magic;                  /* identifies a core file */
  58        char            u_comm[32];             /* user command name */
  59};
  60
  61#define NBPG                    PAGE_SIZE
  62#define UPAGES                  1
  63#define HOST_TEXT_START_ADDR    (u.start_code)
  64#define HOST_DATA_START_ADDR    (u.start_data)
  65#define HOST_STACK_END_ADDR     (u.start_stack + u.u_ssize * NBPG)
  66
  67#endif /* __ASM_SH_USER_H */
  68