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  */
   7
   8 #define PTRACE_GETREGS          12      /* General registers */
   9 #define PTRACE_SETREGS          13
  10
  11 #define PTRACE_GETFPREGS        14      /* FPU registers */
  12 #define PTRACE_SETFPREGS        15
  13
  14 #define PTRACE_GETFDPIC         31      /* get the ELF fdpic loadmap address */
  15
  16 #define PTRACE_GETFDPIC_EXEC    0       /* [addr] request the executable loadmap */
  17 #define PTRACE_GETFDPIC_INTERP  1       /* [addr] request the interpreter loadmap */
  18
  19 #define PTRACE_GETDSPREGS       55      /* DSP registers */
  20 #define PTRACE_SETDSPREGS       56
  21
  22 #define PT_TEXT_END_ADDR        240
  23 #define PT_TEXT_ADDR            244     /* &(struct user)->start_code */
  24 #define PT_DATA_ADDR            248     /* &(struct user)->start_data */
  25 #define PT_TEXT_LEN             252
  26
  27 #if defined(__SH5__) || defined(CONFIG_CPU_SH5)
  28 #include "ptrace_64.h"
  29 #else
  30 #include "ptrace_32.h"
  31 #endif
  32
  33 #ifdef __KERNEL__
  34
  35 #include <linux/stringify.h>
  36 #include <linux/stddef.h>
  37 #include <linux/thread_info.h>
  38 #include <asm/addrspace.h>
  39 #include <asm/page.h>
  40 #include <asm/system.h>
  41
  42 #define user_mode(regs)                 (((regs)->sr & 0x40000000)==0)
  43 #define kernel_stack_pointer(_regs)     ((unsigned long)(_regs)->regs[15])
  44
  45 #define GET_FP(regs)    ((regs)->regs[14])
  46 #define GET_USP(regs)   ((regs)->regs[15])
  47
  48 extern void show_regs(struct pt_regs *);
  49
  50 #define arch_has_single_step()  (1)
  51
  52 /*
  53  * kprobe-based event tracer support
  54  */
  55 struct pt_regs_offset {
  56         const char *name;
  57         int offset;
  58 };
  59
  60 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
  61 #define REGS_OFFSET_NAME(num)   \
  62         {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
  63 #define TREGS_OFFSET_NAME(num)  \
  64         {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
  65 #define REG_OFFSET_END {.name = NULL, .offset = 0}
  66
  67 /* Query offset/name of register from its name/offset */
  68 extern int regs_query_register_offset(const char *name);
  69 extern const char *regs_query_register_name(unsigned int offset);
  70
  71 extern const struct pt_regs_offset regoffset_table[];
  72
  73 /**
  74  * regs_get_register() - get register value from its offset
  75  * @regs:       pt_regs from which register value is gotten.
  76  * @offset:     offset number of the register.
  77  *
  78  * regs_get_register returns the value of a register. The @offset is the
  79  * offset of the register in struct pt_regs address which specified by @regs.
  80  * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
  81  */
  82 static inline unsigned long regs_get_register(struct pt_regs *regs,
  83                                               unsigned int offset)
  84 {
  85         if (unlikely(offset > MAX_REG_OFFSET))
  86                 return 0;
  87         return *(unsigned long *)((unsigned long)regs + offset);
  88 }
  89
  90 /**
  91  * regs_within_kernel_stack() - check the address in the stack
  92  * @regs:       pt_regs which contains kernel stack pointer.
  93  * @addr:       address which is checked.
  94  *
  95  * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
  96  * If @addr is within the kernel stack, it returns true. If not, returns false.
  97  */
  98 static inline int regs_within_kernel_stack(struct pt_regs *regs,
  99                                            unsigned long addr)
 100 {
 101         return ((addr & ~(THREAD_SIZE - 1))  ==
 102                 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
 103 }
 104
 105 /**
 106  * regs_get_kernel_stack_nth() - get Nth entry of the stack
 107  * @regs:       pt_regs which contains kernel stack pointer.
 108  * @n:          stack entry number.
 109  *
 110  * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
 111  * is specified by @regs. If the @n th entry is NOT in the kernel stack,
 112  * this returns 0.
 113  */
 114 static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 115                                                       unsigned int n)
 116 {
 117         unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
 118         addr += n;
 119         if (regs_within_kernel_stack(regs, (unsigned long)addr))
 120                 return *addr;
 121         else
 122                 return 0;
 123 }
 124
 125 struct perf_event;
 126 struct perf_sample_data;
 127
 128 extern void ptrace_triggered(struct perf_event *bp, int nmi,
 129                       struct perf_sample_data *data, struct pt_regs *regs);
 130
 131 #define task_pt_regs(task) \
 132         ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
 133
 134 static inline unsigned long profile_pc(struct pt_regs *regs)
 135 {
 136         unsigned long pc = regs->pc;
 137
 138         if (virt_addr_uncached(pc))
 139                 return CAC_ADDR(pc);
 140
 141         return pc;
 142 }
 143 #define profile_pc profile_pc
 144
 145 #include <asm-generic/ptrace.h>
 146 #endif /* __KERNEL__ */
 147
 148 #endif /* __ASM_SH_PTRACE_H */