arch/sh/include/asm/ptrace.h

   1 #ifndef __ASM_SH_PTRACE_H
   2 #define __ASM_SH_PTRACE_H
   3
   4 /*
   5  * Copyright (C) 1999, 2000  Niibe Yutaka
   6  * from linux kernel code.
   7  */
   8
   9 /*
  10  * GCC defines register number like this:
  11  * -----------------------------
  12  *       0 - 15 are integer registers
  13  *      17 - 22 are control/special registers
  14  *      24 - 39 fp registers
  15  *      40 - 47 xd registers
  16  *      48 -    fpscr register
  17  * -----------------------------
  18  *
  19  * We follows above, except:
  20  *      16 --- program counter (PC)
  21  *      22 --- syscall #
  22  *      23 --- floating point communication register
  23  */
  24 #define REG_REG0         0
  25 #define REG_REG15       15
  26
  27 #define REG_PC          16
  28
  29 #define REG_PR          17
  30 #define REG_SR          18
  31 #define REG_GBR         19
  32 #define REG_MACH        20
  33 #define REG_MACL        21
  34
  35 #define REG_SYSCALL     22
  36
  37 #define REG_FPREG0      23
  38 #define REG_FPREG15     38
  39 #define REG_XFREG0      39
  40 #define REG_XFREG15     54
  41
  42 #define REG_FPSCR       55
  43 #define REG_FPUL        56
  44
  45 /* options set using PTRACE_SETOPTIONS */
  46 #define PTRACE_O_TRACESYSGOOD     0x00000001
  47
  48 /*
  49  * This struct defines the way the registers are stored on the
  50  * kernel stack during a system call or other kernel entry.
  51  */
  52 struct pt_regs {
  53         unsigned long regs[16];
  54         unsigned long pc;
  55         unsigned long pr;
  56         unsigned long sr;
  57         unsigned long gbr;
  58         unsigned long mach;
  59         unsigned long macl;
  60         long tra;
  61 };
  62
  63 /*
  64  * This struct defines the way the DSP registers are stored on the
  65  * kernel stack during a system call or other kernel entry.
  66  */
  67 struct pt_dspregs {
  68         unsigned long   a1;
  69         unsigned long   a0g;
  70         unsigned long   a1g;
  71         unsigned long   m0;
  72         unsigned long   m1;
  73         unsigned long   a0;
  74         unsigned long   x0;
  75         unsigned long   x1;
  76         unsigned long   y0;
  77         unsigned long   y1;
  78         unsigned long   dsr;
  79         unsigned long   rs;
  80         unsigned long   re;
  81         unsigned long   mod;
  82 };
  83
  84 #define PTRACE_GETDSPREGS       55
  85 #define PTRACE_SETDSPREGS       56
  86
  87 #ifdef __KERNEL__
  88 #define user_mode(regs) (((regs)->sr & 0x40000000)==0)
  89 #define instruction_pointer(regs) ((regs)->pc)
  90 extern void show_regs(struct pt_regs *);
  91
  92 #ifdef CONFIG_SH_DSP
  93 #define task_pt_regs(task) \
  94         ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
  95                  - sizeof(struct pt_dspregs) - sizeof(unsigned long)) - 1)
  96 #else
  97 #define task_pt_regs(task) \
  98         ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
  99                  - sizeof(unsigned long)) - 1)
 100 #endif
 101
 102 static inline unsigned long profile_pc(struct pt_regs *regs)
 103 {
 104         unsigned long pc = instruction_pointer(regs);
 105
 106         if (pc >= 0xa0000000UL && pc < 0xc0000000UL)
 107                 pc -= 0x20000000;
 108         return pc;
 109 }
 110 #endif
 111
 112 #endif /* __ASM_SH_PTRACE_H */