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
  41 #define user_mode(regs)                 (((regs)->sr & 0x40000000)==0)
  42 #define kernel_stack_pointer(_regs)     ((unsigned long)(_regs)->regs[15])
  43
  44 #define GET_FP(regs)    ((regs)->regs[14])
  45 #define GET_USP(regs)   ((regs)->regs[15])
  46
  47 #define arch_has_single_step()  (1)
  48
  49 /*
  50  * kprobe-based event tracer support
  51  */
  52 struct pt_regs_offset {
  53         const char *name;
  54         int offset;
  55 };
  56
  57 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
  58 #define REGS_OFFSET_NAME(num)   \
  59         {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
  60 #define TREGS_OFFSET_NAME(num)  \
  61         {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
  62 #define REG_OFFSET_END {.name = NULL, .offset = 0}
  63
  64 /* Query offset/name of register from its name/offset */
  65 extern int regs_query_register_offset(const char *name);
  66 extern const char *regs_query_register_name(unsigned int offset);
  67
  68 extern const struct pt_regs_offset regoffset_table[];
  69
  70 /**
  71  * regs_get_register() - get register value from its offset
  72  * @regs:       pt_regs from which register value is gotten.
  73  * @offset:     offset number of the register.
  74  *
  75  * regs_get_register returns the value of a register. The @offset is the
  76  * offset of the register in struct pt_regs address which specified by @regs.
  77  * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
  78  */
  79 static inline unsigned long regs_get_register(struct pt_regs *regs,
  80                                               unsigned int offset)
  81 {
  82         if (unlikely(offset > MAX_REG_OFFSET))
  83                 return 0;
  84         return *(unsigned long *)((unsigned long)regs + offset);
  85 }
  86
  87 /**
  88  * regs_within_kernel_stack() - check the address in the stack
  89  * @regs:       pt_regs which contains kernel stack pointer.
  90  * @addr:       address which is checked.
  91  *
  92  * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
  93  * If @addr is within the kernel stack, it returns true. If not, returns false.
  94  */
  95 static inline int regs_within_kernel_stack(struct pt_regs *regs,
  96                                            unsigned long addr)
  97 {
  98         return ((addr & ~(THREAD_SIZE - 1))  ==
  99                 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
 100 }
 101
 102 /**
 103  * regs_get_kernel_stack_nth() - get Nth entry of the stack
 104  * @regs:       pt_regs which contains kernel stack pointer.
 105  * @n:          stack entry number.
 106  *
 107  * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
 108  * is specified by @regs. If the @n th entry is NOT in the kernel stack,
 109  * this returns 0.
 110  */
 111 static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 112                                                       unsigned int n)
 113 {
 114         unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
 115         addr += n;
 116         if (regs_within_kernel_stack(regs, (unsigned long)addr))
 117                 return *addr;
 118         else
 119                 return 0;
 120 }
 121
 122 struct perf_event;
 123 struct perf_sample_data;
 124
 125 extern void ptrace_triggered(struct perf_event *bp,
 126                       struct perf_sample_data *data, struct pt_regs *regs);
 127
 128 #define task_pt_regs(task) \
 129         ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
 130
 131 static inline unsigned long profile_pc(struct pt_regs *regs)
 132 {
 133         unsigned long pc = regs->pc;
 134
 135         if (virt_addr_uncached(pc))
 136                 return CAC_ADDR(pc);
 137
 138         return pc;
 139 }
 140 #define profile_pc profile_pc
 141
 142 #include <asm-generic/ptrace.h>
 143 #endif /* __KERNEL__ */
 144
 145 #endif /* __ASM_SH_PTRACE_H */