[mirror_ubuntu-bionic-kernel.git] / arch / sparc / include / asm / ptrace.h

/* 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/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) */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f3ec38d5 SR	2	#ifndef __SPARC_PTRACE_H
	3	#define __SPARC_PTRACE_H
	4
54579826	5	#include <uapi/asm/ptrace.h>
f3ec38d5 SR	6
f3ec38d5 SR	7	#if defined(__sparc__) && defined(__arch64__)
f3ec38d5 SR	8	#ifndef __ASSEMBLY__
f3ec38d5 SR	9
f3ec38d5	10	#include <linux/threads.h>
7f55ba9c	11	#include <asm/switch_to.h>
f3ec38d5 SR	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
1918c7f5 AV	36	#define current_pt_regs() \
	37	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
	38
f3ec38d5 SR	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	};
916ca14a DM	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];
f3ec38d5	61
dff933da	62	#define force_successful_syscall_return() set_thread_noerror(1)
f3ec38d5 SR	63	#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
f3ec38d5 SR	64	#define instruction_pointer(regs) ((regs)->tpc)
e8f4aa60 AP	65	#define instruction_pointer_set(regs, val) do { \
	66	(regs)->tpc = (val); \
	67	(regs)->tnpc = (val)+4; \
	68	} while (0)
f3ec38d5	69	#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
d7e7528b EP	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	}
f3ec38d5	79	#ifdef CONFIG_SMP
f05a6865	80	unsigned long profile_pc(struct pt_regs *);
f3ec38d5 SR	81	#else
f3ec38d5 SR	82	#define profile_pc(regs) instruction_pointer(regs)
1da177e4	83	#endif
e8f4aa60 AP	84
	85	#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
	86
b7c02b73 DM	87	int regs_query_register_offset(const char *name);
b7c02b73 DM	88	unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
e8f4aa60 AP	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	}
f3ec38d5	115	#else /* __ASSEMBLY__ */
f3ec38d5	116	#endif /* __ASSEMBLY__ */
f3ec38d5	117	#else /* (defined(__sparc__) && defined(__arch64__)) */
f3ec38d5	118	#ifndef __ASSEMBLY__
bde4d8b2	119	#include <asm/switch_to.h>
f3ec38d5	120
f3ec38d5 SR	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
ab348681 AV	139	#define current_pt_regs() \
	140	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
	141
f3ec38d5 SR	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 *);
f3ec38d5	146	#else /* (!__ASSEMBLY__) */
f3ec38d5	147	#endif /* (!__ASSEMBLY__) */
f3ec38d5	148	#endif /* (defined(__sparc__) && defined(__arch64__)) */
f3ec38d5	149	#define STACK_BIAS 2047
f3ec38d5 SR	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
f3ec38d5	161	#endif /* !(__SPARC_PTRACE_H) */