1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __SPARC_PTRACE_H 3 #define __SPARC_PTRACE_H 4 5 #include <uapi/asm/ptrace.h> 6 7 #if defined(__sparc__) && defined(__arch64__) 8 #ifndef __ASSEMBLY__ 9 10 #include <linux/compiler.h> 11 #include <linux/threads.h> 12 #include <asm/switch_to.h> 13 14 static inline int pt_regs_trap_type(struct pt_regs *regs) 15 { 16 return regs->magic & 0x1ff; 17 } 18 19 static inline bool pt_regs_is_syscall(struct pt_regs *regs) 20 { 21 return (regs->tstate & TSTATE_SYSCALL); 22 } 23 24 static inline bool pt_regs_clear_syscall(struct pt_regs *regs) 25 { 26 return (regs->tstate &= ~TSTATE_SYSCALL); 27 } 28 29 #define arch_ptrace_stop_needed(exit_code, info) \ 30 ({ flush_user_windows(); \ 31 get_thread_wsaved() != 0; \ 32 }) 33 34 #define arch_ptrace_stop(exit_code, info) \ 35 synchronize_user_stack() 36 37 #define current_pt_regs() \ 38 ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1) 39 40 struct global_reg_snapshot { 41 unsigned long tstate; 42 unsigned long tpc; 43 unsigned long tnpc; 44 unsigned long o7; 45 unsigned long i7; 46 unsigned long rpc; 47 struct thread_info *thread; 48 unsigned long pad1; 49 }; 50 51 struct global_pmu_snapshot { 52 unsigned long pcr[4]; 53 unsigned long pic[4]; 54 }; 55 56 union global_cpu_snapshot { 57 struct global_reg_snapshot reg; 58 struct global_pmu_snapshot pmu; 59 }; 60 61 extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS]; 62 63 #define force_successful_syscall_return() set_thread_noerror(1) 64 #define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV)) 65 #define instruction_pointer(regs) ((regs)->tpc) 66 #define instruction_pointer_set(regs, val) do { \ 67 (regs)->tpc = (val); \ 68 (regs)->tnpc = (val)+4; \ 69 } while (0) 70 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP]) 71 static inline int is_syscall_success(struct pt_regs *regs) 72 { 73 return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)); 74 } 75 76 static inline long regs_return_value(struct pt_regs *regs) 77 { 78 return regs->u_regs[UREG_I0]; 79 } 80 #ifdef CONFIG_SMP 81 unsigned long profile_pc(struct pt_regs *); 82 #else 83 #define profile_pc(regs) instruction_pointer(regs) 84 #endif 85 86 #define MAX_REG_OFFSET (offsetof(struct pt_regs, magic)) 87 88 int regs_query_register_offset(const char *name); 89 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); 90 91 /** 92 * regs_get_register() - get register value from its offset 93 * @regs: pt_regs from which register value is gotten 94 * @offset: offset number of the register. 95 * 96 * regs_get_register returns the value of a register whose 97 * offset from @regs. The @offset is the offset of the register 98 * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET, 99 * this returns 0. 100 */ 101 static inline unsigned long regs_get_register(struct pt_regs *regs, 102 unsigned long offset) 103 { 104 if (unlikely(offset >= MAX_REG_OFFSET)) 105 return 0; 106 if (offset == PT_V9_Y) 107 return *(unsigned int *)((unsigned long)regs + offset); 108 return *(unsigned long *)((unsigned long)regs + offset); 109 } 110 111 /* Valid only for Kernel mode traps. */ 112 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 113 { 114 return regs->u_regs[UREG_I6]; 115 } 116 #else /* __ASSEMBLY__ */ 117 #endif /* __ASSEMBLY__ */ 118 #else /* (defined(__sparc__) && defined(__arch64__)) */ 119 #ifndef __ASSEMBLY__ 120 #include <asm/switch_to.h> 121 122 static inline bool pt_regs_is_syscall(struct pt_regs *regs) 123 { 124 return (regs->psr & PSR_SYSCALL); 125 } 126 127 static inline bool pt_regs_clear_syscall(struct pt_regs *regs) 128 { 129 return (regs->psr &= ~PSR_SYSCALL); 130 } 131 132 #define arch_ptrace_stop_needed(exit_code, info) \ 133 ({ flush_user_windows(); \ 134 current_thread_info()->w_saved != 0; \ 135 }) 136 137 #define arch_ptrace_stop(exit_code, info) \ 138 synchronize_user_stack() 139 140 #define current_pt_regs() \ 141 ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1) 142 143 #define user_mode(regs) (!((regs)->psr & PSR_PS)) 144 #define instruction_pointer(regs) ((regs)->pc) 145 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP]) 146 unsigned long profile_pc(struct pt_regs *); 147 #else /* (!__ASSEMBLY__) */ 148 #endif /* (!__ASSEMBLY__) */ 149 #endif /* (defined(__sparc__) && defined(__arch64__)) */ 150 #define STACK_BIAS 2047 151 152 /* global_reg_snapshot offsets */ 153 #define GR_SNAP_TSTATE 0x00 154 #define GR_SNAP_TPC 0x08 155 #define GR_SNAP_TNPC 0x10 156 #define GR_SNAP_O7 0x18 157 #define GR_SNAP_I7 0x20 158 #define GR_SNAP_RPC 0x28 159 #define GR_SNAP_THREAD 0x30 160 #define GR_SNAP_PAD1 0x38 161 162 #endif /* !(__SPARC_PTRACE_H) */ 163