linux/arch/s390/kernel/compat_ptrace.h
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   1#ifndef _PTRACE32_H
   2#define _PTRACE32_H
   3
   4#include "compat_linux.h"  /* needed for psw_compat_t */
   5
   6typedef struct {
   7        __u32 cr[3];
   8} per_cr_words32;
   9
  10typedef struct {
  11        __u16          perc_atmid;          /* 0x096 */
  12        __u32          address;             /* 0x098 */
  13        __u8           access_id;           /* 0x0a1 */
  14} per_lowcore_words32;
  15
  16typedef struct {
  17        union {
  18                per_cr_words32   words;
  19        } control_regs;
  20        /*
  21         * Use these flags instead of setting em_instruction_fetch
  22         * directly they are used so that single stepping can be
  23         * switched on & off while not affecting other tracing
  24         */
  25        unsigned  single_step       : 1;
  26        unsigned  instruction_fetch : 1;
  27        unsigned                    : 30;
  28        /*
  29         * These addresses are copied into cr10 & cr11 if single
  30         * stepping is switched off
  31         */
  32        __u32     starting_addr;
  33        __u32     ending_addr;
  34        union {
  35                per_lowcore_words32 words;
  36        } lowcore; 
  37} per_struct32;
  38
  39struct user_regs_struct32
  40{
  41        psw_compat_t psw;
  42        u32 gprs[NUM_GPRS];
  43        u32 acrs[NUM_ACRS];
  44        u32 orig_gpr2;
  45        /* nb: there's a 4-byte hole here */
  46        s390_fp_regs fp_regs;
  47        /*
  48         * These per registers are in here so that gdb can modify them
  49         * itself as there is no "official" ptrace interface for hardware
  50         * watchpoints. This is the way intel does it.
  51         */
  52        per_struct32 per_info;
  53        u32  ieee_instruction_pointer; 
  54        /* Used to give failing instruction back to user for ieee exceptions */
  55};
  56
  57struct user32 {
  58        /* We start with the registers, to mimic the way that "memory"
  59           is returned from the ptrace(3,...) function.  */
  60        struct user_regs_struct32 regs; /* Where the registers are actually stored */
  61        /* The rest of this junk is to help gdb figure out what goes where */
  62        u32 u_tsize;            /* Text segment size (pages). */
  63        u32 u_dsize;            /* Data segment size (pages). */
  64        u32 u_ssize;            /* Stack segment size (pages). */
  65        u32 start_code;         /* Starting virtual address of text. */
  66        u32 start_stack;        /* Starting virtual address of stack area.
  67                                   This is actually the bottom of the stack,
  68                                   the top of the stack is always found in the
  69                                   esp register.  */
  70        s32 signal;              /* Signal that caused the core dump. */
  71        u32 u_ar0;               /* Used by gdb to help find the values for */
  72                                 /* the registers. */
  73        u32 magic;               /* To uniquely identify a core file */
  74        char u_comm[32];         /* User command that was responsible */
  75};
  76
  77typedef struct
  78{
  79        __u32   len;
  80        __u32   kernel_addr;
  81        __u32   process_addr;
  82} ptrace_area_emu31;
  83
  84#endif /* _PTRACE32_H */
  85