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compat_ptrace.h

#ifndef _PTRACE32_H
#define _PTRACE32_H

#include "compat_linux.h"  /* needed for psw_compat_t */

typedef struct {
      __u32 cr[3];
} per_cr_words32;

typedef struct {
      __u16          perc_atmid;          /* 0x096 */
      __u32          address;             /* 0x098 */
      __u8           access_id;           /* 0x0a1 */
} per_lowcore_words32;

typedef struct {
      union {
            per_cr_words32   words;
      } control_regs;
      /*
       * Use these flags instead of setting em_instruction_fetch
       * directly they are used so that single stepping can be
       * switched on & off while not affecting other tracing
       */
      unsigned  single_step       : 1;
      unsigned  instruction_fetch : 1;
      unsigned                    : 30;
      /*
       * These addresses are copied into cr10 & cr11 if single
       * stepping is switched off
       */
      __u32     starting_addr;
      __u32     ending_addr;
      union {
            per_lowcore_words32 words;
      } lowcore; 
} per_struct32;

struct user_regs_struct32
{
      psw_compat_t psw;
      u32 gprs[NUM_GPRS];
      u32 acrs[NUM_ACRS];
      u32 orig_gpr2;
      /* nb: there's a 4-byte hole here */
      s390_fp_regs fp_regs;
      /*
       * These per registers are in here so that gdb can modify them
       * itself as there is no "official" ptrace interface for hardware
       * watchpoints. This is the way intel does it.
       */
      per_struct32 per_info;
      u32  ieee_instruction_pointer; 
      /* Used to give failing instruction back to user for ieee exceptions */
};

struct user32 {
      /* We start with the registers, to mimic the way that "memory"
         is returned from the ptrace(3,...) function.  */
      struct user_regs_struct32 regs; /* Where the registers are actually stored */
      /* The rest of this junk is to help gdb figure out what goes where */
      u32 u_tsize;            /* Text segment size (pages). */
      u32 u_dsize;              /* Data segment size (pages). */
      u32 u_ssize;              /* Stack segment size (pages). */
      u32 start_code;         /* Starting virtual address of text. */
      u32 start_stack;  /* Starting virtual address of stack area.
                           This is actually the bottom of the stack,
                           the top of the stack is always found in the
                           esp register.  */
      s32 signal;        /* Signal that caused the core dump. */
      u32 u_ar0;               /* Used by gdb to help find the values for */
                               /* the registers. */
      u32 magic;         /* To uniquely identify a core file */
      char u_comm[32];   /* User command that was responsible */
};

typedef struct
{
      __u32   len;
      __u32   kernel_addr;
      __u32   process_addr;
} ptrace_area_emu31;

#endif /* _PTRACE32_H */

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