arch/sparc/include/asm/ptrace.h

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