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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SPARC_PTRACE_H
#define __SPARC_PTRACE_H
#include <uapi/asm/ptrace.h>
#if defined(__sparc__) && defined(__arch64__)
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
#include <linux/threads.h>
#include <asm/switch_to.h>
static inline int pt_regs_trap_type(struct pt_regs *regs)
{
return regs->magic & 0x1ff;
}
static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
return (regs->tstate & TSTATE_SYSCALL);
}
static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
return (regs->tstate &= ~TSTATE_SYSCALL);
}
#define arch_ptrace_stop_needed(exit_code, info) \
({ flush_user_windows(); \
get_thread_wsaved() != 0; \
})
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
struct global_reg_snapshot {
unsigned long tstate;
unsigned long tpc;
unsigned long tnpc;
unsigned long o7;
unsigned long i7;
unsigned long rpc;
struct thread_info *thread;
unsigned long pad1;
};
struct global_pmu_snapshot {
unsigned long pcr[4];
unsigned long pic[4];
};
union global_cpu_snapshot {
struct global_reg_snapshot reg;
struct global_pmu_snapshot pmu;
};
extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) do { \
(regs)->tpc = (val); \
(regs)->tnpc = (val)+4; \
} while (0)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
static inline int is_syscall_success(struct pt_regs *regs)
{
return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
}
static inline long regs_return_value(struct pt_regs *regs)
{
return regs->u_regs[UREG_I0];
}
#ifdef CONFIG_SMP
unsigned long profile_pc(struct pt_regs *);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif
#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
int regs_query_register_offset(const char *name);
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
/**
* regs_get_register() - get register value from its offset
* @regs: pt_regs from which register value is gotten
* @offset: offset number of the register.
*
* regs_get_register returns the value of a register whose
* offset from @regs. The @offset is the offset of the register
* in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
* this returns 0.
*/
static inline unsigned long regs_get_register(struct pt_regs *regs,
unsigned long offset)
{
if (unlikely(offset >= MAX_REG_OFFSET))
return 0;
if (offset == PT_V9_Y)
return *(unsigned int *)((unsigned long)regs + offset);
return *(unsigned long *)((unsigned long)regs + offset);
}
/* Valid only for Kernel mode traps. */
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
return regs->u_regs[UREG_I6];
}
#else /* __ASSEMBLY__ */
#endif /* __ASSEMBLY__ */
#else /* (defined(__sparc__) && defined(__arch64__)) */
#ifndef __ASSEMBLY__
#include <asm/switch_to.h>
static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
return (regs->psr & PSR_SYSCALL);
}
static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
return (regs->psr &= ~PSR_SYSCALL);
}
#define arch_ptrace_stop_needed(exit_code, info) \
({ flush_user_windows(); \
current_thread_info()->w_saved != 0; \
})
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
unsigned long profile_pc(struct pt_regs *);
#else /* (!__ASSEMBLY__) */
#endif /* (!__ASSEMBLY__) */
#endif /* (defined(__sparc__) && defined(__arch64__)) */
#define STACK_BIAS 2047
/* global_reg_snapshot offsets */
#define GR_SNAP_TSTATE 0x00
#define GR_SNAP_TPC 0x08
#define GR_SNAP_TNPC 0x10
#define GR_SNAP_O7 0x18
#define GR_SNAP_I7 0x20
#define GR_SNAP_RPC 0x28
#define GR_SNAP_THREAD 0x30
#define GR_SNAP_PAD1 0x38
#endif /* !(__SPARC_PTRACE_H) */
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