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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_SH_USER_H
   3#define __ASM_SH_USER_H
   4
   5#include <asm/ptrace.h>
   6#include <asm/page.h>
   7
   8/*
   9 * Core file format: The core file is written in such a way that gdb
  10 * can understand it and provide useful information to the user (under
  11 * linux we use the `trad-core' bfd).  The file contents are as follows:
  12 *
  13 *  upage: 1 page consisting of a user struct that tells gdb
  14 *      what is present in the file.  Directly after this is a
  15 *      copy of the task_struct, which is currently not used by gdb,
  16 *      but it may come in handy at some point.  All of the registers
  17 *      are stored as part of the upage.  The upage should always be
  18 *      only one page long.
  19 *  data: The data segment follows next.  We use current->end_text to
  20 *      current->brk to pick up all of the user variables, plus any memory
  21 *      that may have been sbrk'ed.  No attempt is made to determine if a
  22 *      page is demand-zero or if a page is totally unused, we just cover
  23 *      the entire range.  All of the addresses are rounded in such a way
  24 *      that an integral number of pages is written.
  25 *  stack: We need the stack information in order to get a meaningful
  26 *      backtrace.  We need to write the data from usp to
  27 *      current->start_stack, so we round each of these in order to be able
  28 *      to write an integer number of pages.
  29 */
  30
  31#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
  32struct user_fpu_struct {
  33        unsigned long fp_regs[32];
  34        unsigned int fpscr;
  35};
  36#else
  37struct user_fpu_struct {
  38        unsigned long fp_regs[16];
  39        unsigned long xfp_regs[16];
  40        unsigned long fpscr;
  41        unsigned long fpul;
  42};
  43#endif
  44
  45struct user {
  46        struct pt_regs  regs;                   /* entire machine state */
  47        struct user_fpu_struct fpu;     /* Math Co-processor registers  */
  48        int u_fpvalid;          /* True if math co-processor being used */
  49        size_t          u_tsize;                /* text size (pages) */
  50        size_t          u_dsize;                /* data size (pages) */
  51        size_t          u_ssize;                /* stack size (pages) */
  52        unsigned long   start_code;             /* text starting address */
  53        unsigned long   start_data;             /* data starting address */
  54        unsigned long   start_stack;            /* stack starting address */
  55        long int        signal;                 /* signal causing core dump */
  56        unsigned long   u_ar0;                  /* help gdb find registers */
  57        struct user_fpu_struct* u_fpstate;      /* Math Co-processor pointer */
  58        unsigned long   magic;                  /* identifies a core file */
  59        char            u_comm[32];             /* user command name */
  60};
  61
  62#define NBPG                    PAGE_SIZE
  63#define UPAGES                  1
  64#define HOST_TEXT_START_ADDR    (u.start_code)
  65#define HOST_DATA_START_ADDR    (u.start_data)
  66#define HOST_STACK_END_ADDR     (u.start_stack + u.u_ssize * NBPG)
  67
  68#endif /* __ASM_SH_USER_H */
  69