[mirror_ubuntu-zesty-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 <asm/ptrace_64.h>
#else
#include <asm/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>

#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	27	#if defined(__SH5__) \|\| defined(CONFIG_CPU_SH5)
a1ce3928	28	#include <asm/ptrace_64.h>
da28c597	29	#else
a1ce3928	30	#include <asm/ptrace_32.h>
da28c597 PM	31	#endif
da28c597 PM	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	39	#include <asm/page.h>
33f242ed PM	40
33f242ed PM	41	#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
eac676e5	42	#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
db7eba29 PM	43
	44	#define GET_FP(regs) ((regs)->regs[14])
	45	#define GET_USP(regs) ((regs)->regs[15])
33f242ed	46
eaaaeef3 PM	47	#define arch_has_single_step() (1)
eaaaeef3 PM	48
c459dbf2	49	/*
eaaaeef3	50	* kprobe-based event tracer support
c459dbf2	51	*/
eaaaeef3 PM	52	struct pt_regs_offset {
	53	const char *name;
	54	int offset;
	55	};
	56
	57	#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
	58	#define REGS_OFFSET_NAME(num) \
	59	{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
da28c597 PM	60	#define TREGS_OFFSET_NAME(num) \
da28c597 PM	61	{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
eaaaeef3 PM	62	#define REG_OFFSET_END {.name = NULL, .offset = 0}
	63
	64	/* Query offset/name of register from its name/offset */
	65	extern int regs_query_register_offset(const char *name);
	66	extern const char *regs_query_register_name(unsigned int offset);
	67
	68	extern const struct pt_regs_offset regoffset_table[];
	69
	70	/**
	71	* regs_get_register() - get register value from its offset
	72	* @regs: pt_regs from which register value is gotten.
	73	* @offset: offset number of the register.
	74	*
	75	* regs_get_register returns the value of a register. The @offset is the
	76	* offset of the register in struct pt_regs address which specified by @regs.
	77	* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
	78	*/
	79	static inline unsigned long regs_get_register(struct pt_regs *regs,
	80	unsigned int offset)
	81	{
	82	if (unlikely(offset > MAX_REG_OFFSET))
	83	return 0;
	84	return (unsigned long )((unsigned long)regs + offset);
	85	}
	86
	87	/**
	88	* regs_within_kernel_stack() - check the address in the stack
	89	* @regs: pt_regs which contains kernel stack pointer.
	90	* @addr: address which is checked.
	91	*
	92	* regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
	93	* If @addr is within the kernel stack, it returns true. If not, returns false.
	94	*/
	95	static inline int regs_within_kernel_stack(struct pt_regs *regs,
	96	unsigned long addr)
	97	{
	98	return ((addr & ~(THREAD_SIZE - 1)) ==
	99	(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
	100	}
	101
	102	/**
	103	* regs_get_kernel_stack_nth() - get Nth entry of the stack
	104	* @regs: pt_regs which contains kernel stack pointer.
	105	* @n: stack entry number.
	106	*
	107	* regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
	108	* is specified by @regs. If the @n th entry is NOT in the kernel stack,
	109	* this returns 0.
	110	*/
	111	static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
	112	unsigned int n)
	113	{
	114	unsigned long addr = (unsigned long )kernel_stack_pointer(regs);
	115	addr += n;
	116	if (regs_within_kernel_stack(regs, (unsigned long)addr))
	117	return *addr;
	118	else
	119	return 0;
	120	}
c459dbf2	121
34d0b5af PM	122	struct perf_event;
	123	struct perf_sample_data;
	124
c84b51e6	125	extern void ptrace_triggered(struct perf_event *bp,
34d0b5af PM	126	struct perf_sample_data data, struct pt_regs regs);
34d0b5af PM	127
3cf0f4ec	128	#define task_pt_regs(task) \
4f099ebb	129	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
3cf0f4ec	130
1da177e4 LT	131	static inline unsigned long profile_pc(struct pt_regs *regs)
1da177e4 LT	132	{
db7eba29	133	unsigned long pc = regs->pc;
1da177e4	134
9edef286 PM	135	if (virt_addr_uncached(pc))
9edef286 PM	136	return CAC_ADDR(pc);
33f242ed	137
1da177e4 LT	138	return pc;
1da177e4 LT	139	}
3cea45c6 MF	140	#define profile_pc profile_pc
	141
	142	#include <asm-generic/ptrace.h>
33f242ed	143	#endif /* __KERNEL__ */
1da177e4 LT	144
1da177e4 LT	145	#endif /* __ASM_SH_PTRACE_H */