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

#ifndef __ASM_SH_PTRACE_H
#define __ASM_SH_PTRACE_H

/*
 * Copyright (C) 1999, 2000  Niibe Yutaka
 */

#define PTRACE_GETREGS		12	/* General registers */
#define PTRACE_SETREGS		13

#define PTRACE_GETFPREGS	14	/* FPU registers */
#define PTRACE_SETFPREGS	15

#define PTRACE_GETFDPIC		31	/* get the ELF fdpic loadmap address */

#define PTRACE_GETFDPIC_EXEC	0	/* [addr] request the executable loadmap */
#define PTRACE_GETFDPIC_INTERP	1	/* [addr] request the interpreter loadmap */

#define	PTRACE_GETDSPREGS	55	/* DSP registers */
#define	PTRACE_SETDSPREGS	56

#define PT_TEXT_END_ADDR	240
#define PT_TEXT_ADDR		244	/* &(struct user)->start_code */
#define PT_DATA_ADDR		248	/* &(struct user)->start_data */
#define PT_TEXT_LEN		252

#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
#include "ptrace_64.h"
#else
#include "ptrace_32.h"
#endif

#ifdef __KERNEL__

#include <linux/stringify.h>
#include <linux/stddef.h>
#include <linux/thread_info.h>
#include <asm/addrspace.h>
#include <asm/page.h>
#include <asm/system.h>

#define user_mode(regs)			(((regs)->sr & 0x40000000)==0)
#define kernel_stack_pointer(_regs)	((unsigned long)(_regs)->regs[15])

#define GET_FP(regs)	((regs)->regs[14])
#define GET_USP(regs)	((regs)->regs[15])

#define arch_has_single_step()	(1)

/*
 * kprobe-based event tracer support
 */
struct pt_regs_offset {
	const char *name;
	int offset;
};

#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
#define REGS_OFFSET_NAME(num)	\
	{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
#define TREGS_OFFSET_NAME(num)	\
	{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
#define REG_OFFSET_END {.name = NULL, .offset = 0}

/* Query offset/name of register from its name/offset */
extern int regs_query_register_offset(const char *name);
extern const char *regs_query_register_name(unsigned int offset);

extern const struct pt_regs_offset regoffset_table[];

/**
 * 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. The @offset is the
 * offset of the register in struct pt_regs address which specified by @regs.
 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
 */
static inline unsigned long regs_get_register(struct pt_regs *regs,
					      unsigned int offset)
{
	if (unlikely(offset > MAX_REG_OFFSET))
		return 0;
	return *(unsigned long *)((unsigned long)regs + offset);
}

/**
 * regs_within_kernel_stack() - check the address in the stack
 * @regs:	pt_regs which contains kernel stack pointer.
 * @addr:	address which is checked.
 *
 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
 * If @addr is within the kernel stack, it returns true. If not, returns false.
 */
static inline int regs_within_kernel_stack(struct pt_regs *regs,
					   unsigned long addr)
{
	return ((addr & ~(THREAD_SIZE - 1))  ==
		(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
}

/**
 * regs_get_kernel_stack_nth() - get Nth entry of the stack
 * @regs:	pt_regs which contains kernel stack pointer.
 * @n:		stack entry number.
 *
 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
 * this returns 0.
 */
static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
						      unsigned int n)
{
	unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
	addr += n;
	if (regs_within_kernel_stack(regs, (unsigned long)addr))
		return *addr;
	else
		return 0;
}

struct perf_event;
struct perf_sample_data;

extern void ptrace_triggered(struct perf_event *bp,
		      struct perf_sample_data *data, struct pt_regs *regs);

#define task_pt_regs(task) \
	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)

static inline unsigned long profile_pc(struct pt_regs *regs)
{
	unsigned long pc = regs->pc;

	if (virt_addr_uncached(pc))
		return CAC_ADDR(pc);

	return pc;
}
#define profile_pc profile_pc

#include <asm-generic/ptrace.h>
#endif /* __KERNEL__ */

#endif /* __ASM_SH_PTRACE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_SH_PTRACE_H
	2	#define __ASM_SH_PTRACE_H
	3
1da177e4 LT	4	/*
1da177e4 LT	5	* Copyright (C) 1999, 2000 Niibe Yutaka
1da177e4	6	*/
1da177e4	7
934135c1 PM	8	#define PTRACE_GETREGS 12 /* General registers */
	9	#define PTRACE_SETREGS 13
	10
	11	#define PTRACE_GETFPREGS 14 /* FPU registers */
	12	#define PTRACE_SETFPREGS 15
	13
3bc24a1a PM	14	#define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
	15
	16	#define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
	17	#define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
	18
934135c1	19	#define PTRACE_GETDSPREGS 55 /* DSP registers */
1da177e4 LT	20	#define PTRACE_SETDSPREGS 56
1da177e4 LT	21
b0f3ae03 PM	22	#define PT_TEXT_END_ADDR 240
	23	#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */
	24	#define PT_DATA_ADDR 248 /* &(struct user)->start_data */
be6514c6 KB	25	#define PT_TEXT_LEN 252
be6514c6 KB	26
da28c597 PM	27	#if defined(__SH5__) \|\| defined(CONFIG_CPU_SH5)
	28	#include "ptrace_64.h"
	29	#else
	30	#include "ptrace_32.h"
	31	#endif
	32
1da177e4	33	#ifdef __KERNEL__
da28c597 PM	34
	35	#include <linux/stringify.h>
	36	#include <linux/stddef.h>
	37	#include <linux/thread_info.h>
33f242ed	38	#include <asm/addrspace.h>
b0f3ae03 PM	39	#include <asm/page.h>
b0f3ae03 PM	40	#include <asm/system.h>
33f242ed PM	41
33f242ed PM	42	#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
eac676e5	43	#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
db7eba29 PM	44
	45	#define GET_FP(regs) ((regs)->regs[14])
	46	#define GET_USP(regs) ((regs)->regs[15])
33f242ed	47
eaaaeef3 PM	48	#define arch_has_single_step() (1)
eaaaeef3 PM	49
c459dbf2	50	/*
eaaaeef3	51	* kprobe-based event tracer support
c459dbf2	52	*/
eaaaeef3 PM	53	struct pt_regs_offset {
	54	const char *name;
	55	int offset;
	56	};
	57
	58	#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
	59	#define REGS_OFFSET_NAME(num) \
	60	{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
da28c597 PM	61	#define TREGS_OFFSET_NAME(num) \
da28c597 PM	62	{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
eaaaeef3 PM	63	#define REG_OFFSET_END {.name = NULL, .offset = 0}
	64
	65	/* Query offset/name of register from its name/offset */
	66	extern int regs_query_register_offset(const char *name);
	67	extern const char *regs_query_register_name(unsigned int offset);
	68
	69	extern const struct pt_regs_offset regoffset_table[];
	70
	71	/**
	72	* regs_get_register() - get register value from its offset
	73	* @regs: pt_regs from which register value is gotten.
	74	* @offset: offset number of the register.
	75	*
	76	* regs_get_register returns the value of a register. The @offset is the
	77	* offset of the register in struct pt_regs address which specified by @regs.
	78	* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
	79	*/
	80	static inline unsigned long regs_get_register(struct pt_regs *regs,
	81	unsigned int offset)
	82	{
	83	if (unlikely(offset > MAX_REG_OFFSET))
	84	return 0;
	85	return (unsigned long )((unsigned long)regs + offset);
	86	}
	87
	88	/**
	89	* regs_within_kernel_stack() - check the address in the stack
	90	* @regs: pt_regs which contains kernel stack pointer.
	91	* @addr: address which is checked.
	92	*
	93	* regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
	94	* If @addr is within the kernel stack, it returns true. If not, returns false.
	95	*/
	96	static inline int regs_within_kernel_stack(struct pt_regs *regs,
	97	unsigned long addr)
	98	{
	99	return ((addr & ~(THREAD_SIZE - 1)) ==
	100	(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
	101	}
	102
	103	/**
	104	* regs_get_kernel_stack_nth() - get Nth entry of the stack
	105	* @regs: pt_regs which contains kernel stack pointer.
	106	* @n: stack entry number.
	107	*
	108	* regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
	109	* is specified by @regs. If the @n th entry is NOT in the kernel stack,
	110	* this returns 0.
	111	*/
	112	static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
	113	unsigned int n)
	114	{
	115	unsigned long addr = (unsigned long )kernel_stack_pointer(regs);
	116	addr += n;
	117	if (regs_within_kernel_stack(regs, (unsigned long)addr))
	118	return *addr;
	119	else
	120	return 0;
	121	}
c459dbf2	122
34d0b5af PM	123	struct perf_event;
	124	struct perf_sample_data;
	125
c84b51e6	126	extern void ptrace_triggered(struct perf_event *bp,
34d0b5af PM	127	struct perf_sample_data data, struct pt_regs regs);
34d0b5af PM	128
3cf0f4ec	129	#define task_pt_regs(task) \
4f099ebb	130	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
3cf0f4ec	131
1da177e4 LT	132	static inline unsigned long profile_pc(struct pt_regs *regs)
1da177e4 LT	133	{
db7eba29	134	unsigned long pc = regs->pc;
1da177e4	135
9edef286 PM	136	if (virt_addr_uncached(pc))
9edef286 PM	137	return CAC_ADDR(pc);
33f242ed	138
1da177e4 LT	139	return pc;
1da177e4 LT	140	}
3cea45c6 MF	141	#define profile_pc profile_pc
	142
	143	#include <asm-generic/ptrace.h>
33f242ed	144	#endif /* __KERNEL__ */
1da177e4 LT	145
1da177e4 LT	146	#endif /* __ASM_SH_PTRACE_H */