arch/sparc/include/asm/ptrace.h

   1 #ifndef __SPARC_PTRACE_H
   2 #define __SPARC_PTRACE_H
   3
   4 #include <uapi/asm/ptrace.h>
   5
   6 #if defined(__sparc__) && defined(__arch64__)
   7 #ifndef __ASSEMBLY__
   8
   9 #include <linux/threads.h>
  10 #include <asm/switch_to.h>
  11
  12 static inline int pt_regs_trap_type(struct pt_regs *regs)
  13 {
  14         return regs->magic & 0x1ff;
  15 }
  16
  17 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
  18 {
  19         return (regs->tstate & TSTATE_SYSCALL);
  20 }
  21
  22 static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
  23 {
  24         return (regs->tstate &= ~TSTATE_SYSCALL);
  25 }
  26
  27 #define arch_ptrace_stop_needed(exit_code, info) \
  28 ({      flush_user_windows(); \
  29         get_thread_wsaved() != 0; \
  30 })
  31
  32 #define arch_ptrace_stop(exit_code, info) \
  33         synchronize_user_stack()
  34
  35 #define current_pt_regs() \
  36         ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
  37
  38 struct global_reg_snapshot {
  39         unsigned long           tstate;
  40         unsigned long           tpc;
  41         unsigned long           tnpc;
  42         unsigned long           o7;
  43         unsigned long           i7;
  44         unsigned long           rpc;
  45         struct thread_info      *thread;
  46         unsigned long           pad1;
  47 };
  48
  49 struct global_pmu_snapshot {
  50         unsigned long           pcr[4];
  51         unsigned long           pic[4];
  52 };
  53
  54 union global_cpu_snapshot {
  55         struct global_reg_snapshot      reg;
  56         struct global_pmu_snapshot      pmu;
  57 };
  58
  59 extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
  60
  61 #define force_successful_syscall_return() set_thread_noerror(1)
  62 #define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
  63 #define instruction_pointer(regs) ((regs)->tpc)
  64 #define instruction_pointer_set(regs, val) do { \
  65                 (regs)->tpc = (val); \
  66                 (regs)->tnpc = (val)+4; \
  67         } while (0)
  68 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
  69 static inline int is_syscall_success(struct pt_regs *regs)
  70 {
  71         return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
  72 }
  73
  74 static inline long regs_return_value(struct pt_regs *regs)
  75 {
  76         return regs->u_regs[UREG_I0];
  77 }
  78 #ifdef CONFIG_SMP
  79 unsigned long profile_pc(struct pt_regs *);
  80 #else
  81 #define profile_pc(regs) instruction_pointer(regs)
  82 #endif
  83
  84 #define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
  85
  86 int regs_query_register_offset(const char *name);
  87 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
  88
  89 /**
  90  * regs_get_register() - get register value from its offset
  91  * @regs:       pt_regs from which register value is gotten
  92  * @offset:     offset number of the register.
  93  *
  94  * regs_get_register returns the value of a register whose
  95  * offset from @regs. The @offset is the offset of the register
  96  * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
  97  * this returns 0.
  98  */
  99 static inline unsigned long regs_get_register(struct pt_regs *regs,
 100                                              unsigned long offset)
 101 {
 102         if (unlikely(offset >= MAX_REG_OFFSET))
 103                 return 0;
 104         if (offset == PT_V9_Y)
 105                 return *(unsigned int *)((unsigned long)regs + offset);
 106         return *(unsigned long *)((unsigned long)regs + offset);
 107 }
 108
 109 /* Valid only for Kernel mode traps. */
 110 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 111 {
 112         return regs->u_regs[UREG_I6];
 113 }
 114 #else /* __ASSEMBLY__ */
 115 #endif /* __ASSEMBLY__ */
 116 #else /* (defined(__sparc__) && defined(__arch64__)) */
 117 #ifndef __ASSEMBLY__
 118 #include <asm/switch_to.h>
 119
 120 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
 121 {
 122         return (regs->psr & PSR_SYSCALL);
 123 }
 124
 125 static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
 126 {
 127         return (regs->psr &= ~PSR_SYSCALL);
 128 }
 129
 130 #define arch_ptrace_stop_needed(exit_code, info) \
 131 ({      flush_user_windows(); \
 132         current_thread_info()->w_saved != 0;    \
 133 })
 134
 135 #define arch_ptrace_stop(exit_code, info) \
 136         synchronize_user_stack()
 137
 138 #define current_pt_regs() \
 139         ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
 140
 141 #define user_mode(regs) (!((regs)->psr & PSR_PS))
 142 #define instruction_pointer(regs) ((regs)->pc)
 143 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
 144 unsigned long profile_pc(struct pt_regs *);
 145 #else /* (!__ASSEMBLY__) */
 146 #endif /* (!__ASSEMBLY__) */
 147 #endif /* (defined(__sparc__) && defined(__arch64__)) */
 148 #define STACK_BIAS              2047
 149
 150 /* global_reg_snapshot offsets */
 151 #define GR_SNAP_TSTATE  0x00
 152 #define GR_SNAP_TPC     0x08
 153 #define GR_SNAP_TNPC    0x10
 154 #define GR_SNAP_O7      0x18
 155 #define GR_SNAP_I7      0x20
 156 #define GR_SNAP_RPC     0x28
 157 #define GR_SNAP_THREAD  0x30
 158 #define GR_SNAP_PAD1    0x38
 159
 160 #endif /* !(__SPARC_PTRACE_H) */