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 #define arch_has_single_step()  (1)
  49
  50 /*
  51  * kprobe-based event tracer support
  52  */
  53 struct pt_regs_offset {
  54         const char *name;
  55         int offset;
  56 };
  57
  58 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
  59 #define REGS_OFFSET_NAME(num)   \
  60         {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
  61 #define TREGS_OFFSET_NAME(num)  \
  62         {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
  63 #define REG_OFFSET_END {.name = NULL, .offset = 0}
  64
  65 /* Query offset/name of register from its name/offset */
  66 extern int regs_query_register_offset(const char *name);
  67 extern const char *regs_query_register_name(unsigned int offset);
  68
  69 extern const struct pt_regs_offset regoffset_table[];
  70
  71 /**
  72  * regs_get_register() - get register value from its offset
  73  * @regs:       pt_regs from which register value is gotten.
  74  * @offset:     offset number of the register.
  75  *
  76  * regs_get_register returns the value of a register. The @offset is the
  77  * offset of the register in struct pt_regs address which specified by @regs.
  78  * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
  79  */
  80 static inline unsigned long regs_get_register(struct pt_regs *regs,
  81                                               unsigned int offset)
  82 {
  83         if (unlikely(offset > MAX_REG_OFFSET))
  84                 return 0;
  85         return *(unsigned long *)((unsigned long)regs + offset);
  86 }
  87
  88 /**
  89  * regs_within_kernel_stack() - check the address in the stack
  90  * @regs:       pt_regs which contains kernel stack pointer.
  91  * @addr:       address which is checked.
  92  *
  93  * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
  94  * If @addr is within the kernel stack, it returns true. If not, returns false.
  95  */
  96 static inline int regs_within_kernel_stack(struct pt_regs *regs,
  97                                            unsigned long addr)
  98 {
  99         return ((addr & ~(THREAD_SIZE - 1))  ==
 100                 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
 101 }
 102
 103 /**
 104  * regs_get_kernel_stack_nth() - get Nth entry of the stack
 105  * @regs:       pt_regs which contains kernel stack pointer.
 106  * @n:          stack entry number.
 107  *
 108  * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
 109  * is specified by @regs. If the @n th entry is NOT in the kernel stack,
 110  * this returns 0.
 111  */
 112 static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 113                                                       unsigned int n)
 114 {
 115         unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
 116         addr += n;
 117         if (regs_within_kernel_stack(regs, (unsigned long)addr))
 118                 return *addr;
 119         else
 120                 return 0;
 121 }
 122
 123 struct perf_event;
 124 struct perf_sample_data;
 125
 126 extern void ptrace_triggered(struct perf_event *bp,
 127                       struct perf_sample_data *data, struct pt_regs *regs);
 128
 129 #define task_pt_regs(task) \
 130         ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
 131
 132 static inline unsigned long profile_pc(struct pt_regs *regs)
 133 {
 134         unsigned long pc = regs->pc;
 135
 136         if (virt_addr_uncached(pc))
 137                 return CAC_ADDR(pc);
 138
 139         return pc;
 140 }
 141 #define profile_pc profile_pc
 142
 143 #include <asm-generic/ptrace.h>
 144 #endif /* __KERNEL__ */
 145
 146 #endif /* __ASM_SH_PTRACE_H */