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/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() \
  30 ({      flush_user_windows(); \
  31         get_thread_wsaved() != 0; \
  32 })
  33
  34 #define arch_ptrace_stop() \
  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() \
 133 ({      flush_user_windows(); \
 134         current_thread_info()->w_saved != 0;    \
 135 })
 136
 137 #define arch_ptrace_stop() \
 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) */