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) */ 161