LXR linux/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
  14static inline int pt_regs_trap_type(struct pt_regs *regs)
  15{
  16        return regs->magic & 0x1ff;
  17}
  18
  19static inline bool pt_regs_is_syscall(struct pt_regs *regs)
  20{
  21        return (regs->tstate & TSTATE_SYSCALL);
  22}
  23
  24static 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
  40struct 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
  51struct global_pmu_snapshot {
  52        unsigned long           pcr[4];
  53        unsigned long           pic[4];
  54};
  55
  56union global_cpu_snapshot {
  57        struct global_reg_snapshot      reg;
  58        struct global_pmu_snapshot      pmu;
  59};
  60
  61extern 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])
  71static inline int is_syscall_success(struct pt_regs *regs)
  72{
  73        return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
  74}
  75
  76static inline long regs_return_value(struct pt_regs *regs)
  77{
  78        return regs->u_regs[UREG_I0];
  79}
  80#ifdef CONFIG_SMP
  81unsigned 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
  88int regs_query_register_offset(const char *name);
  89unsigned 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 */
 101static 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. */
 112static 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
 122static inline bool pt_regs_is_syscall(struct pt_regs *regs)
 123{
 124        return (regs->psr & PSR_SYSCALL);
 125}
 126
 127static 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])
 146unsigned 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