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 extern int regs_query_register_offset(const char *name); 87 88 /** 89 * regs_get_register() - get register value from its offset 90 * @regs: pt_regs from which register value is gotten 91 * @offset: offset number of the register. 92 * 93 * regs_get_register returns the value of a register whose 94 * offset from @regs. The @offset is the offset of the register 95 * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET, 96 * this returns 0. 97 */ 98 static inline unsigned long regs_get_register(struct pt_regs *regs, 99 unsigned long offset) 100 { 101 if (unlikely(offset >= MAX_REG_OFFSET)) 102 return 0; 103 if (offset == PT_V9_Y) 104 return *(unsigned int *)((unsigned long)regs + offset); 105 return *(unsigned long *)((unsigned long)regs + offset); 106 } 107 108 /* Valid only for Kernel mode traps. */ 109 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 110 { 111 return regs->u_regs[UREG_I6]; 112 } 113 #else /* __ASSEMBLY__ */ 114 #endif /* __ASSEMBLY__ */ 115 #else /* (defined(__sparc__) && defined(__arch64__)) */ 116 #ifndef __ASSEMBLY__ 117 #include <asm/switch_to.h> 118 119 static inline bool pt_regs_is_syscall(struct pt_regs *regs) 120 { 121 return (regs->psr & PSR_SYSCALL); 122 } 123 124 static inline bool pt_regs_clear_syscall(struct pt_regs *regs) 125 { 126 return (regs->psr &= ~PSR_SYSCALL); 127 } 128 129 #define arch_ptrace_stop_needed(exit_code, info) \ 130 ({ flush_user_windows(); \ 131 current_thread_info()->w_saved != 0; \ 132 }) 133 134 #define arch_ptrace_stop(exit_code, info) \ 135 synchronize_user_stack() 136 137 #define current_pt_regs() \ 138 ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1) 139 140 #define user_mode(regs) (!((regs)->psr & PSR_PS)) 141 #define instruction_pointer(regs) ((regs)->pc) 142 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP]) 143 unsigned long profile_pc(struct pt_regs *); 144 #else /* (!__ASSEMBLY__) */ 145 #endif /* (!__ASSEMBLY__) */ 146 #endif /* (defined(__sparc__) && defined(__arch64__)) */ 147 #define STACK_BIAS 2047 148 149 /* global_reg_snapshot offsets */ 150 #define GR_SNAP_TSTATE 0x00 151 #define GR_SNAP_TPC 0x08 152 #define GR_SNAP_TNPC 0x10 153 #define GR_SNAP_O7 0x18 154 #define GR_SNAP_I7 0x20 155 #define GR_SNAP_RPC 0x28 156 #define GR_SNAP_THREAD 0x30 157 #define GR_SNAP_PAD1 0x38 158 159 #endif /* !(__SPARC_PTRACE_H) */ 160