arch/s390/kernel/compat_ptrace.h

   1 #ifndef _PTRACE32_H
   2 #define _PTRACE32_H
   3
   4 #include "compat_linux.h"  /* needed for psw_compat_t */
   5
   6 typedef struct {
   7         __u32 cr[3];
   8 } per_cr_words32;
   9
  10 typedef struct {
  11         __u16          perc_atmid;          /* 0x096 */
  12         __u32          address;             /* 0x098 */
  13         __u8           access_id;           /* 0x0a1 */
  14 } per_lowcore_words32;
  15
  16 typedef 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
  39 struct 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
  57 struct 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
  77 typedef struct
  78 {
  79         __u32   len;
  80         __u32   kernel_addr;
  81         __u32   process_addr;
  82 } ptrace_area_emu31;
  83
  84 #endif /* _PTRACE32_H */