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) ((regs)->tpc = (val))
  65 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
  66 static inline int is_syscall_success(struct pt_regs *regs)
  67 {
  68         return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
  69 }
  70
  71 static inline long regs_return_value(struct pt_regs *regs)
  72 {
  73         return regs->u_regs[UREG_I0];
  74 }
  75 #ifdef CONFIG_SMP
  76 extern unsigned long profile_pc(struct pt_regs *);
  77 #else
  78 #define profile_pc(regs) instruction_pointer(regs)
  79 #endif
  80 #else /* __ASSEMBLY__ */
  81 #endif /* __ASSEMBLY__ */
  82 #else /* (defined(__sparc__) && defined(__arch64__)) */
  83 #ifndef __ASSEMBLY__
  84 #include <asm/switch_to.h>
  85
  86 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
  87 {
  88         return (regs->psr & PSR_SYSCALL);
  89 }
  90
  91 static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
  92 {
  93         return (regs->psr &= ~PSR_SYSCALL);
  94 }
  95
  96 #define arch_ptrace_stop_needed(exit_code, info) \
  97 ({      flush_user_windows(); \
  98         current_thread_info()->w_saved != 0;    \
  99 })
 100
 101 #define arch_ptrace_stop(exit_code, info) \
 102         synchronize_user_stack()
 103
 104 #define current_pt_regs() \
 105         ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
 106
 107 #define user_mode(regs) (!((regs)->psr & PSR_PS))
 108 #define instruction_pointer(regs) ((regs)->pc)
 109 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
 110 unsigned long profile_pc(struct pt_regs *);
 111 #else /* (!__ASSEMBLY__) */
 112 #endif /* (!__ASSEMBLY__) */
 113 #endif /* (defined(__sparc__) && defined(__arch64__)) */
 114 #define STACK_BIAS              2047
 115
 116 /* global_reg_snapshot offsets */
 117 #define GR_SNAP_TSTATE  0x00
 118 #define GR_SNAP_TPC     0x08
 119 #define GR_SNAP_TNPC    0x10
 120 #define GR_SNAP_O7      0x18
 121 #define GR_SNAP_I7      0x20
 122 #define GR_SNAP_RPC     0x28
 123 #define GR_SNAP_THREAD  0x30
 124 #define GR_SNAP_PAD1    0x38
 125
 126 #endif /* !(__SPARC_PTRACE_H) */