[linux-block.git] / include / asm-x86 / ptrace.h

#ifndef _ASM_X86_PTRACE_H
#define _ASM_X86_PTRACE_H

#include <linux/compiler.h>	/* For __user */
#include <asm/ptrace-abi.h>
#include <asm/processor-flags.h>

#ifdef __KERNEL__
#include <asm/ds.h>		/* the DS BTS struct is used for ptrace too */
#include <asm/segment.h>
#endif

#ifndef __ASSEMBLY__

#ifdef __i386__
/* this struct defines the way the registers are stored on the
   stack during a system call. */

#ifndef __KERNEL__

struct pt_regs {
	long ebx;
	long ecx;
	long edx;
	long esi;
	long edi;
	long ebp;
	long eax;
	int  xds;
	int  xes;
	int  xfs;
	/* int  gs; */
	long orig_eax;
	long eip;
	int  xcs;
	long eflags;
	long esp;
	int  xss;
};

#else /* __KERNEL__ */

struct pt_regs {
	unsigned long bx;
	unsigned long cx;
	unsigned long dx;
	unsigned long si;
	unsigned long di;
	unsigned long bp;
	unsigned long ax;
	unsigned long ds;
	unsigned long es;
	unsigned long fs;
	/* int  gs; */
	unsigned long orig_ax;
	unsigned long ip;
	unsigned long cs;
	unsigned long flags;
	unsigned long sp;
	unsigned long ss;
};

#endif /* __KERNEL__ */

#else /* __i386__ */

#ifndef __KERNEL__

struct pt_regs {
	unsigned long r15;
	unsigned long r14;
	unsigned long r13;
	unsigned long r12;
	unsigned long rbp;
	unsigned long rbx;
/* arguments: non interrupts/non tracing syscalls only save upto here*/
	unsigned long r11;
	unsigned long r10;
	unsigned long r9;
	unsigned long r8;
	unsigned long rax;
	unsigned long rcx;
	unsigned long rdx;
	unsigned long rsi;
	unsigned long rdi;
	unsigned long orig_rax;
/* end of arguments */
/* cpu exception frame or undefined */
	unsigned long rip;
	unsigned long cs;
	unsigned long eflags;
	unsigned long rsp;
	unsigned long ss;
/* top of stack page */
};

#else /* __KERNEL__ */

struct pt_regs {
	unsigned long r15;
	unsigned long r14;
	unsigned long r13;
	unsigned long r12;
	unsigned long bp;
	unsigned long bx;
/* arguments: non interrupts/non tracing syscalls only save upto here*/
	unsigned long r11;
	unsigned long r10;
	unsigned long r9;
	unsigned long r8;
	unsigned long ax;
	unsigned long cx;
	unsigned long dx;
	unsigned long si;
	unsigned long di;
	unsigned long orig_ax;
/* end of arguments */
/* cpu exception frame or undefined */
	unsigned long ip;
	unsigned long cs;
	unsigned long flags;
	unsigned long sp;
	unsigned long ss;
/* top of stack page */
};

#endif /* __KERNEL__ */
#endif /* !__i386__ */

#ifdef __KERNEL__

/* the DS BTS struct is used for ptrace as well */
#include <asm/ds.h>

struct task_struct;

extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);

extern unsigned long profile_pc(struct pt_regs *regs);

extern unsigned long
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);

#ifdef CONFIG_X86_32
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
			 int error_code);
#else
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
#endif

static inline unsigned long regs_return_value(struct pt_regs *regs)
{
	return regs->ax;
}

/*
 * user_mode_vm(regs) determines whether a register set came from user mode.
 * This is true if V8086 mode was enabled OR if the register set was from
 * protected mode with RPL-3 CS value.  This tricky test checks that with
 * one comparison.  Many places in the kernel can bypass this full check
 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
 */
static inline int user_mode(struct pt_regs *regs)
{
#ifdef CONFIG_X86_32
	return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
#else
	return !!(regs->cs & 3);
#endif
}

static inline int user_mode_vm(struct pt_regs *regs)
{
#ifdef CONFIG_X86_32
	return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >=
		USER_RPL;
#else
	return user_mode(regs);
#endif
}

static inline int v8086_mode(struct pt_regs *regs)
{
#ifdef CONFIG_X86_32
	return (regs->flags & X86_VM_MASK);
#else
	return 0;	/* No V86 mode support in long mode */
#endif
}

/*
 * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
 * when it traps.  So regs will be the current sp.
 *
 * This is valid only for kernel mode traps.
 */
static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
{
#ifdef CONFIG_X86_32
	return (unsigned long)regs;
#else
	return regs->sp;
#endif
}

static inline unsigned long instruction_pointer(struct pt_regs *regs)
{
	return regs->ip;
}

static inline unsigned long frame_pointer(struct pt_regs *regs)
{
	return regs->bp;
}

/*
 * These are defined as per linux/ptrace.h, which see.
 */
#define arch_has_single_step()	(1)
extern void user_enable_single_step(struct task_struct *);
extern void user_disable_single_step(struct task_struct *);

extern void user_enable_block_step(struct task_struct *);
#ifdef CONFIG_X86_DEBUGCTLMSR
#define arch_has_block_step()	(1)
#else
#define arch_has_block_step()	(boot_cpu_data.x86 >= 6)
#endif

struct user_desc;
extern int do_get_thread_area(struct task_struct *p, int idx,
			      struct user_desc __user *info);
extern int do_set_thread_area(struct task_struct *p, int idx,
			      struct user_desc __user *info, int can_allocate);

#define __ARCH_WANT_COMPAT_SYS_PTRACE

#endif /* __KERNEL__ */

#endif /* !__ASSEMBLY__ */

#endif
Commit	Line	Data
8fc37f2c TG	1	#ifndef _ASM_X86_PTRACE_H
	2	#define _ASM_X86_PTRACE_H
	3
	4	#include <linux/compiler.h> /* For __user */
	5	#include <asm/ptrace-abi.h>
6330a30a	6	#include <asm/processor-flags.h>
8fc37f2c	7
6330a30a VN	8	#ifdef __KERNEL__
	9	#include <asm/ds.h> /* the DS BTS struct is used for ptrace too */
	10	#include <asm/segment.h>
	11	#endif
eee3af4a	12
8fc37f2c TG	13	#ifndef __ASSEMBLY__
	14
	15	#ifdef __i386__
	16	/* this struct defines the way the registers are stored on the
	17	stack during a system call. */
	18
65ea5b03 PA	19	#ifndef __KERNEL__
65ea5b03 PA	20
8fc37f2c TG	21	struct pt_regs {
	22	long ebx;
	23	long ecx;
	24	long edx;
	25	long esi;
	26	long edi;
	27	long ebp;
	28	long eax;
	29	int xds;
	30	int xes;
	31	int xfs;
65ea5b03	32	/* int gs; */
8fc37f2c TG	33	long orig_eax;
	34	long eip;
	35	int xcs;
	36	long eflags;
	37	long esp;
	38	int xss;
	39	};
	40
65ea5b03 PA	41	#else /* __KERNEL__ */
	42
	43	struct pt_regs {
92bc2056 HH	44	unsigned long bx;
	45	unsigned long cx;
	46	unsigned long dx;
	47	unsigned long si;
	48	unsigned long di;
	49	unsigned long bp;
9902a702	50	unsigned long ax;
92bc2056 HH	51	unsigned long ds;
	52	unsigned long es;
	53	unsigned long fs;
65ea5b03	54	/* int gs; */
9902a702	55	unsigned long orig_ax;
92bc2056 HH	56	unsigned long ip;
	57	unsigned long cs;
	58	unsigned long flags;
	59	unsigned long sp;
	60	unsigned long ss;
65ea5b03	61	};
8fc37f2c	62
8fc37f2c TG	63	#endif /* __KERNEL__ */
	64
	65	#else /* __i386__ */
	66
65ea5b03 PA	67	#ifndef __KERNEL__
65ea5b03 PA	68
8fc37f2c TG	69	struct pt_regs {
	70	unsigned long r15;
	71	unsigned long r14;
	72	unsigned long r13;
	73	unsigned long r12;
	74	unsigned long rbp;
	75	unsigned long rbx;
	76	/* arguments: non interrupts/non tracing syscalls only save upto here*/
	77	unsigned long r11;
	78	unsigned long r10;
	79	unsigned long r9;
	80	unsigned long r8;
	81	unsigned long rax;
	82	unsigned long rcx;
	83	unsigned long rdx;
	84	unsigned long rsi;
	85	unsigned long rdi;
	86	unsigned long orig_rax;
	87	/* end of arguments */
	88	/* cpu exception frame or undefined */
	89	unsigned long rip;
	90	unsigned long cs;
	91	unsigned long eflags;
	92	unsigned long rsp;
	93	unsigned long ss;
	94	/* top of stack page */
	95	};
	96
65ea5b03 PA	97	#else /* __KERNEL__ */
	98
	99	struct pt_regs {
	100	unsigned long r15;
	101	unsigned long r14;
	102	unsigned long r13;
	103	unsigned long r12;
	104	unsigned long bp;
	105	unsigned long bx;
	106	/* arguments: non interrupts/non tracing syscalls only save upto here*/
	107	unsigned long r11;
	108	unsigned long r10;
	109	unsigned long r9;
	110	unsigned long r8;
	111	unsigned long ax;
	112	unsigned long cx;
	113	unsigned long dx;
	114	unsigned long si;
	115	unsigned long di;
	116	unsigned long orig_ax;
	117	/* end of arguments */
	118	/* cpu exception frame or undefined */
	119	unsigned long ip;
	120	unsigned long cs;
	121	unsigned long flags;
	122	unsigned long sp;
	123	unsigned long ss;
	124	/* top of stack page */
	125	};
8fc37f2c	126
dbe3533b HH	127	#endif /* __KERNEL__ */
dbe3533b HH	128	#endif /* !__i386__ */
8fc37f2c	129
dbe3533b HH	130	#ifdef __KERNEL__
	131
	132	/* the DS BTS struct is used for ptrace as well */
	133	#include <asm/ds.h>
8fc37f2c TG	134
	135	struct task_struct;
	136
dbe3533b HH	137	extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
	138
	139	extern unsigned long profile_pc(struct pt_regs *regs);
	140
8fc37f2c	141	extern unsigned long
37cd9cf3	142	convert_ip_to_linear(struct task_struct child, struct pt_regs regs);
8fc37f2c	143
dbe3533b	144	#ifdef CONFIG_X86_32
72f74fa2 JP	145	extern void send_sigtrap(struct task_struct tsk, struct pt_regs regs,
72f74fa2 JP	146	int error_code);
dbe3533b HH	147	#else
	148	void signal_fault(struct pt_regs regs, void __user frame, char *where);
	149	#endif
efd1ca52	150
9902a702 HH	151	static inline unsigned long regs_return_value(struct pt_regs *regs)
	152	{
	153	return regs->ax;
	154	}
efd1ca52	155
90d43d72 HH	156	/*
	157	* user_mode_vm(regs) determines whether a register set came from user mode.
	158	* This is true if V8086 mode was enabled OR if the register set was from
	159	* protected mode with RPL-3 CS value. This tricky test checks that with
	160	* one comparison. Many places in the kernel can bypass this full check
	161	* if they have already ruled out V8086 mode, so user_mode(regs) can be used.
	162	*/
	163	static inline int user_mode(struct pt_regs *regs)
	164	{
	165	#ifdef CONFIG_X86_32
	166	return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
	167	#else
	168	return !!(regs->cs & 3);
	169	#endif
	170	}
	171
	172	static inline int user_mode_vm(struct pt_regs *regs)
	173	{
	174	#ifdef CONFIG_X86_32
6b6891f9	175	return ((regs->cs & SEGMENT_RPL_MASK) \| (regs->flags & X86_VM_MASK)) >=
72f74fa2	176	USER_RPL;
90d43d72 HH	177	#else
	178	return user_mode(regs);
	179	#endif
	180	}
	181
	182	static inline int v8086_mode(struct pt_regs *regs)
	183	{
	184	#ifdef CONFIG_X86_32
6b6891f9	185	return (regs->flags & X86_VM_MASK);
90d43d72 HH	186	#else
	187	return 0; /* No V86 mode support in long mode */
	188	#endif
	189	}
	190
f6e8e284 HH	191	/*
	192	* X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
	193	* when it traps. So regs will be the current sp.
	194	*
	195	* This is valid only for kernel mode traps.
	196	*/
	197	static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
90d43d72 HH	198	{
	199	#ifdef CONFIG_X86_32
	200	return (unsigned long)regs;
	201	#else
	202	return regs->sp;
	203	#endif
	204	}
	205
	206	static inline unsigned long instruction_pointer(struct pt_regs *regs)
	207	{
	208	return regs->ip;
	209	}
	210
	211	static inline unsigned long frame_pointer(struct pt_regs *regs)
	212	{
	213	return regs->bp;
	214	}
	215
7f232343 RM	216	/*
	217	* These are defined as per linux/ptrace.h, which see.
	218	*/
	219	#define arch_has_single_step() (1)
	220	extern void user_enable_single_step(struct task_struct *);
	221	extern void user_disable_single_step(struct task_struct *);
	222
10faa81e RM	223	extern void user_enable_block_step(struct task_struct *);
	224	#ifdef CONFIG_X86_DEBUGCTLMSR
	225	#define arch_has_block_step() (1)
	226	#else
	227	#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
	228	#endif
	229
efd1ca52 RM	230	struct user_desc;
	231	extern int do_get_thread_area(struct task_struct *p, int idx,
	232	struct user_desc __user *info);
	233	extern int do_set_thread_area(struct task_struct *p, int idx,
	234	struct user_desc __user *info, int can_allocate);
	235
562b80ba RM	236	#define __ARCH_WANT_COMPAT_SYS_PTRACE
562b80ba RM	237
efd1ca52 RM	238	#endif /* __KERNEL__ */
efd1ca52 RM	239
8fc37f2c TG	240	#endif /* !__ASSEMBLY__ */
8fc37f2c TG	241
96a388de	242	#endif