[mirror_ubuntu-zesty-kernel.git] / include / asm-powerpc / ptrace.h

#ifndef _ASM_POWERPC_PTRACE_H
#define _ASM_POWERPC_PTRACE_H

/*
 * Copyright (C) 2001 PPC64 Team, IBM Corp
 *
 * This struct defines the way the registers are stored on the
 * kernel stack during a system call or other kernel entry.
 *
 * this should only contain volatile regs
 * since we can keep non-volatile in the thread_struct
 * should set this up when only volatiles are saved
 * by intr code.
 *
 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
 * that the overall structure is a multiple of 16 bytes in length.
 *
 * Note that the offsets of the fields in this struct correspond with
 * the PT_* values below.  This simplifies arch/powerpc/kernel/ptrace.c.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef __ASSEMBLY__

struct pt_regs {
	unsigned long gpr[32];
	unsigned long nip;
	unsigned long msr;
	unsigned long orig_gpr3;	/* Used for restarting system calls */
	unsigned long ctr;
	unsigned long link;
	unsigned long xer;
	unsigned long ccr;
#ifdef __powerpc64__
	unsigned long softe;		/* Soft enabled/disabled */
#else
	unsigned long mq;		/* 601 only (not used at present) */
					/* Used on APUS to hold IPL value. */
#endif
	unsigned long trap;		/* Reason for being here */
	/* N.B. for critical exceptions on 4xx, the dar and dsisr
	   fields are overloaded to hold srr0 and srr1. */
	unsigned long dar;		/* Fault registers */
	unsigned long dsisr;		/* on 4xx/Book-E used for ESR */
	unsigned long result;		/* Result of a system call */
};

#endif /* __ASSEMBLY__ */

#ifdef __KERNEL__

#ifdef __powerpc64__

#define __ARCH_WANT_COMPAT_SYS_PTRACE

#define STACK_FRAME_OVERHEAD	112	/* size of minimum stack frame */
#define STACK_FRAME_LR_SAVE	2	/* Location of LR in stack frame */
#define STACK_FRAME_REGS_MARKER	ASM_CONST(0x7265677368657265)
#define STACK_INT_FRAME_SIZE	(sizeof(struct pt_regs) + \
					STACK_FRAME_OVERHEAD + 288)
#define STACK_FRAME_MARKER	12

/* Size of dummy stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE	128
#define __SIGNAL_FRAMESIZE32	64

#else /* __powerpc64__ */

#define STACK_FRAME_OVERHEAD	16	/* size of minimum stack frame */
#define STACK_FRAME_LR_SAVE	1	/* Location of LR in stack frame */
#define STACK_FRAME_REGS_MARKER	ASM_CONST(0x72656773)
#define STACK_INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
#define STACK_FRAME_MARKER	2

/* Size of stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE	64

#endif /* __powerpc64__ */

#ifndef __ASSEMBLY__

#define instruction_pointer(regs) ((regs)->nip)
#define regs_return_value(regs) ((regs)->gpr[3])

#ifdef CONFIG_SMP
extern unsigned long profile_pc(struct pt_regs *regs);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif

#ifdef __powerpc64__
#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
#else
#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
#endif

#define force_successful_syscall_return()   \
	do { \
		set_thread_flag(TIF_NOERROR); \
	} while(0)

struct task_struct;
extern unsigned long ptrace_get_reg(struct task_struct *task, int regno);
extern int ptrace_put_reg(struct task_struct *task, int regno,
			  unsigned long data);

/*
 * We use the least-significant bit of the trap field to indicate
 * whether we have saved the full set of registers, or only a
 * partial set.  A 1 there means the partial set.
 * On 4xx we use the next bit to indicate whether the exception
 * is a critical exception (1 means it is).
 */
#define FULL_REGS(regs)		(((regs)->trap & 1) == 0)
#ifndef __powerpc64__
#define IS_CRITICAL_EXC(regs)	(((regs)->trap & 2) != 0)
#define IS_MCHECK_EXC(regs)	(((regs)->trap & 4) != 0)
#endif /* ! __powerpc64__ */
#define TRAP(regs)		((regs)->trap & ~0xF)
#ifdef __powerpc64__
#define CHECK_FULL_REGS(regs)	BUG_ON(regs->trap & 1)
#else
#define CHECK_FULL_REGS(regs)						      \
do {									      \
	if ((regs)->trap & 1)						      \
		printk(KERN_CRIT "%s: partial register set\n", __FUNCTION__); \
} while (0)
#endif /* __powerpc64__ */

/*
 * 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 *);

#endif /* __ASSEMBLY__ */

#endif /* __KERNEL__ */

/*
 * Offsets used by 'ptrace' system call interface.
 * These can't be changed without breaking binary compatibility
 * with MkLinux, etc.
 */
#define PT_R0	0
#define PT_R1	1
#define PT_R2	2
#define PT_R3	3
#define PT_R4	4
#define PT_R5	5
#define PT_R6	6
#define PT_R7	7
#define PT_R8	8
#define PT_R9	9
#define PT_R10	10
#define PT_R11	11
#define PT_R12	12
#define PT_R13	13
#define PT_R14	14
#define PT_R15	15
#define PT_R16	16
#define PT_R17	17
#define PT_R18	18
#define PT_R19	19
#define PT_R20	20
#define PT_R21	21
#define PT_R22	22
#define PT_R23	23
#define PT_R24	24
#define PT_R25	25
#define PT_R26	26
#define PT_R27	27
#define PT_R28	28
#define PT_R29	29
#define PT_R30	30
#define PT_R31	31

#define PT_NIP	32
#define PT_MSR	33
#define PT_ORIG_R3 34
#define PT_CTR	35
#define PT_LNK	36
#define PT_XER	37
#define PT_CCR	38
#ifndef __powerpc64__
#define PT_MQ	39
#else
#define PT_SOFTE 39
#endif
#define PT_TRAP	40
#define PT_DAR	41
#define PT_DSISR 42
#define PT_RESULT 43
#define PT_REGS_COUNT 44

#define PT_FPR0	48	/* each FP reg occupies 2 slots in this space */

#ifndef __powerpc64__

#define PT_FPR31 (PT_FPR0 + 2*31)
#define PT_FPSCR (PT_FPR0 + 2*32 + 1)

#else /* __powerpc64__ */

#define PT_FPSCR (PT_FPR0 + 32)	/* each FP reg occupies 1 slot in 64-bit space */

#ifdef __KERNEL__
#define PT_FPSCR32 (PT_FPR0 + 2*32 + 1)	/* each FP reg occupies 2 32-bit userspace slots */
#endif

#define PT_VR0 82	/* each Vector reg occupies 2 slots in 64-bit */
#define PT_VSCR (PT_VR0 + 32*2 + 1)
#define PT_VRSAVE (PT_VR0 + 33*2)

#ifdef __KERNEL__
#define PT_VR0_32 164	/* each Vector reg occupies 4 slots in 32-bit */
#define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
#define PT_VRSAVE_32 (PT_VR0 + 33*4)
#endif

#endif /* __powerpc64__ */

/*
 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
 * The transfer totals 34 quadword.  Quadwords 0-31 contain the
 * corresponding vector registers.  Quadword 32 contains the vscr as the
 * last word (offset 12) within that quadword.  Quadword 33 contains the
 * vrsave as the first word (offset 0) within the quadword.
 *
 * This definition of the VMX state is compatible with the current PPC32
 * ptrace interface.  This allows signal handling and ptrace to use the same
 * structures.  This also simplifies the implementation of a bi-arch
 * (combined (32- and 64-bit) gdb.
 */
#define PTRACE_GETVRREGS	18
#define PTRACE_SETVRREGS	19

/* Get/set all the upper 32-bits of the SPE registers, accumulator, and
 * spefscr, in one go */
#define PTRACE_GETEVRREGS	20
#define PTRACE_SETEVRREGS	21

/*
 * Get or set a debug register. The first 16 are DABR registers and the
 * second 16 are IABR registers.
 */
#define PTRACE_GET_DEBUGREG	25
#define PTRACE_SET_DEBUGREG	26

/* (new) PTRACE requests using the same numbers as x86 and the same
 * argument ordering. Additionally, they support more registers too
 */
#define PTRACE_GETREGS            12
#define PTRACE_SETREGS            13
#define PTRACE_GETFPREGS          14
#define PTRACE_SETFPREGS          15
#define PTRACE_GETREGS64	  22
#define PTRACE_SETREGS64	  23

/* (old) PTRACE requests with inverted arguments */
#define PPC_PTRACE_GETREGS	0x99	/* Get GPRs 0 - 31 */
#define PPC_PTRACE_SETREGS	0x98	/* Set GPRs 0 - 31 */
#define PPC_PTRACE_GETFPREGS	0x97	/* Get FPRs 0 - 31 */
#define PPC_PTRACE_SETFPREGS	0x96	/* Set FPRs 0 - 31 */

/* Calls to trace a 64bit program from a 32bit program */
#define PPC_PTRACE_PEEKTEXT_3264 0x95
#define PPC_PTRACE_PEEKDATA_3264 0x94
#define PPC_PTRACE_POKETEXT_3264 0x93
#define PPC_PTRACE_POKEDATA_3264 0x92
#define PPC_PTRACE_PEEKUSR_3264  0x91
#define PPC_PTRACE_POKEUSR_3264  0x90

#endif /* _ASM_POWERPC_PTRACE_H */
Commit	Line	Data
da80d460 SR	1	#ifndef _ASM_POWERPC_PTRACE_H
da80d460 SR	2	#define _ASM_POWERPC_PTRACE_H
1da177e4 LT	3
	4	/*
	5	* Copyright (C) 2001 PPC64 Team, IBM Corp
	6	*
	7	* This struct defines the way the registers are stored on the
	8	* kernel stack during a system call or other kernel entry.
	9	*
	10	* this should only contain volatile regs
	11	* since we can keep non-volatile in the thread_struct
	12	* should set this up when only volatiles are saved
	13	* by intr code.
	14	*
	15	* Since this is going on the stack, CARE MUST BE TAKEN to insure
	16	* that the overall structure is a multiple of 16 bytes in length.
	17	*
	18	* Note that the offsets of the fields in this struct correspond with
da80d460	19	* the PT_* values below. This simplifies arch/powerpc/kernel/ptrace.c.
1da177e4 LT	20	*
	21	* This program is free software; you can redistribute it and/or
	22	* modify it under the terms of the GNU General Public License
	23	* as published by the Free Software Foundation; either version
	24	* 2 of the License, or (at your option) any later version.
	25	*/
	26
	27	#ifndef __ASSEMBLY__
a0987224	28
1da177e4	29	struct pt_regs {
a0987224 AB	30	unsigned long gpr[32];
	31	unsigned long nip;
	32	unsigned long msr;
da80d460	33	unsigned long orig_gpr3; /* Used for restarting system calls */
a0987224 AB	34	unsigned long ctr;
	35	unsigned long link;
	36	unsigned long xer;
	37	unsigned long ccr;
da80d460 SR	38	#ifdef __powerpc64__
	39	unsigned long softe; /* Soft enabled/disabled */
	40	#else
	41	unsigned long mq; /* 601 only (not used at present) */
	42	/* Used on APUS to hold IPL value. */
	43	#endif
	44	unsigned long trap; /* Reason for being here */
	45	/* N.B. for critical exceptions on 4xx, the dar and dsisr
	46	fields are overloaded to hold srr0 and srr1. */
	47	unsigned long dar; /* Fault registers */
	48	unsigned long dsisr; /* on 4xx/Book-E used for ESR */
	49	unsigned long result; /* Result of a system call */
1da177e4 LT	50	};
1da177e4 LT	51
da80d460	52	#endif /* __ASSEMBLY__ */
1da177e4	53
a0987224 AB	54	#ifdef __KERNEL__
a0987224 AB	55
da80d460 SR	56	#ifdef __powerpc64__
da80d460 SR	57
81e695c0 RM	58	#define __ARCH_WANT_COMPAT_SYS_PTRACE
81e695c0 RM	59
da80d460	60	#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
ec2b36b9 BH	61	#define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */
	62	#define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265)
	63	#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \
	64	STACK_FRAME_OVERHEAD + 288)
	65	#define STACK_FRAME_MARKER 12
da80d460 SR	66
	67	/* Size of dummy stack frame allocated when calling signal handler. */
	68	#define __SIGNAL_FRAMESIZE 128
	69	#define __SIGNAL_FRAMESIZE32 64
	70
	71	#else /* __powerpc64__ */
	72
	73	#define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
ec2b36b9 BH	74	#define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */
	75	#define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773)
	76	#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
	77	#define STACK_FRAME_MARKER 2
da80d460 SR	78
	79	/* Size of stack frame allocated when calling signal handler. */
	80	#define __SIGNAL_FRAMESIZE 64
	81
	82	#endif /* __powerpc64__ */
a0987224	83
da80d460 SR	84	#ifndef __ASSEMBLY__
	85
	86	#define instruction_pointer(regs) ((regs)->nip)
b3f827cb AM	87	#define regs_return_value(regs) ((regs)->gpr[3])
b3f827cb AM	88
1da177e4 LT	89	#ifdef CONFIG_SMP
	90	extern unsigned long profile_pc(struct pt_regs *regs);
	91	#else
	92	#define profile_pc(regs) instruction_pointer(regs)
	93	#endif
	94
da80d460	95	#ifdef __powerpc64__
1da177e4	96	#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
da80d460 SR	97	#else
	98	#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
	99	#endif
1da177e4 LT	100
1da177e4 LT	101	#define force_successful_syscall_return() \
da80d460	102	do { \
401d1f02	103	set_thread_flag(TIF_NOERROR); \
da80d460	104	} while(0)
1da177e4	105
865418d8 BH	106	struct task_struct;
	107	extern unsigned long ptrace_get_reg(struct task_struct *task, int regno);
	108	extern int ptrace_put_reg(struct task_struct *task, int regno,
	109	unsigned long data);
	110
1da177e4 LT	111	/*
	112	* We use the least-significant bit of the trap field to indicate
	113	* whether we have saved the full set of registers, or only a
	114	* partial set. A 1 there means the partial set.
da80d460 SR	115	* On 4xx we use the next bit to indicate whether the exception
da80d460 SR	116	* is a critical exception (1 means it is).
1da177e4 LT	117	*/
1da177e4 LT	118	#define FULL_REGS(regs) (((regs)->trap & 1) == 0)
da80d460	119	#ifndef __powerpc64__
47c0bd1a BH	120	#define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0)
47c0bd1a BH	121	#define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0)
da80d460	122	#endif /* ! __powerpc64__ */
1da177e4	123	#define TRAP(regs) ((regs)->trap & ~0xF)
da80d460	124	#ifdef __powerpc64__
1da177e4	125	#define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1)
da80d460 SR	126	#else
	127	#define CHECK_FULL_REGS(regs) \
	128	do { \
	129	if ((regs)->trap & 1) \
	130	printk(KERN_CRIT "%s: partial register set\n", __FUNCTION__); \
	131	} while (0)
	132	#endif /* __powerpc64__ */
a0987224	133
2a84b0d7 RM	134	/*
	135	* These are defined as per linux/ptrace.h, which see.
	136	*/
	137	#define arch_has_single_step() (1)
	138	extern void user_enable_single_step(struct task_struct *);
	139	extern void user_disable_single_step(struct task_struct *);
	140
a0987224 AB	141	#endif /* __ASSEMBLY__ */
a0987224 AB	142
da80d460	143	#endif /* __KERNEL__ */
a0987224	144
1da177e4 LT	145	/*
1da177e4 LT	146	* Offsets used by 'ptrace' system call interface.
da80d460 SR	147	* These can't be changed without breaking binary compatibility
da80d460 SR	148	* with MkLinux, etc.
1da177e4 LT	149	*/
	150	#define PT_R0 0
	151	#define PT_R1 1
	152	#define PT_R2 2
	153	#define PT_R3 3
	154	#define PT_R4 4
	155	#define PT_R5 5
	156	#define PT_R6 6
	157	#define PT_R7 7
	158	#define PT_R8 8
	159	#define PT_R9 9
	160	#define PT_R10 10
	161	#define PT_R11 11
	162	#define PT_R12 12
	163	#define PT_R13 13
	164	#define PT_R14 14
	165	#define PT_R15 15
	166	#define PT_R16 16
	167	#define PT_R17 17
	168	#define PT_R18 18
	169	#define PT_R19 19
	170	#define PT_R20 20
	171	#define PT_R21 21
	172	#define PT_R22 22
	173	#define PT_R23 23
	174	#define PT_R24 24
	175	#define PT_R25 25
	176	#define PT_R26 26
	177	#define PT_R27 27
	178	#define PT_R28 28
	179	#define PT_R29 29
	180	#define PT_R30 30
	181	#define PT_R31 31
	182
	183	#define PT_NIP 32
	184	#define PT_MSR 33
1da177e4	185	#define PT_ORIG_R3 34
1da177e4 LT	186	#define PT_CTR 35
	187	#define PT_LNK 36
	188	#define PT_XER 37
	189	#define PT_CCR 38
da80d460 SR	190	#ifndef __powerpc64__
	191	#define PT_MQ 39
	192	#else
1da177e4	193	#define PT_SOFTE 39
e17666ba	194	#endif
a0987224 AB	195	#define PT_TRAP 40
	196	#define PT_DAR 41
	197	#define PT_DSISR 42
1da177e4	198	#define PT_RESULT 43
e17666ba	199	#define PT_REGS_COUNT 44
1da177e4	200
da80d460 SR	201	#define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */
	202
	203	#ifndef __powerpc64__
	204
	205	#define PT_FPR31 (PT_FPR0 + 2*31)
	206	#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
	207
	208	#else /* __powerpc64__ */
1da177e4	209
a0987224	210	#define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
1da177e4 LT	211
1da177e4 LT	212	#ifdef __KERNEL__
a0987224	213	#define PT_FPSCR32 (PT_FPR0 + 232 + 1) / each FP reg occupies 2 32-bit userspace slots */
1da177e4 LT	214	#endif
	215
	216	#define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
	217	#define PT_VSCR (PT_VR0 + 32*2 + 1)
	218	#define PT_VRSAVE (PT_VR0 + 33*2)
	219
	220	#ifdef __KERNEL__
	221	#define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
	222	#define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
	223	#define PT_VRSAVE_32 (PT_VR0 + 33*4)
	224	#endif
	225
da80d460 SR	226	#endif /* __powerpc64__ */
da80d460 SR	227
1da177e4	228	/*
da80d460 SR	229	* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
	230	* The transfer totals 34 quadword. Quadwords 0-31 contain the
	231	* corresponding vector registers. Quadword 32 contains the vscr as the
	232	* last word (offset 12) within that quadword. Quadword 33 contains the
1da177e4 LT	233	* vrsave as the first word (offset 0) within the quadword.
1da177e4 LT	234	*
da80d460 SR	235	* This definition of the VMX state is compatible with the current PPC32
	236	* ptrace interface. This allows signal handling and ptrace to use the same
	237	* structures. This also simplifies the implementation of a bi-arch
1da177e4 LT	238	* (combined (32- and 64-bit) gdb.
	239	*/
	240	#define PTRACE_GETVRREGS 18
	241	#define PTRACE_SETVRREGS 19
	242
da80d460 SR	243	/* Get/set all the upper 32-bits of the SPE registers, accumulator, and
	244	* spefscr, in one go */
	245	#define PTRACE_GETEVRREGS 20
	246	#define PTRACE_SETEVRREGS 21
1da177e4	247
a94d3085 AB	248	/*
	249	* Get or set a debug register. The first 16 are DABR registers and the
	250	* second 16 are IABR registers.
	251	*/
	252	#define PTRACE_GET_DEBUGREG 25
	253	#define PTRACE_SET_DEBUGREG 26
	254
e17666ba BH	255	/* (new) PTRACE requests using the same numbers as x86 and the same
	256	* argument ordering. Additionally, they support more registers too
	257	*/
	258	#define PTRACE_GETREGS 12
	259	#define PTRACE_SETREGS 13
	260	#define PTRACE_GETFPREGS 14
	261	#define PTRACE_SETFPREGS 15
	262	#define PTRACE_GETREGS64 22
	263	#define PTRACE_SETREGS64 23
	264
	265	/* (old) PTRACE requests with inverted arguments */
a0987224 AB	266	#define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
	267	#define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
	268	#define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
	269	#define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
	270
	271	/* Calls to trace a 64bit program from a 32bit program */
	272	#define PPC_PTRACE_PEEKTEXT_3264 0x95
	273	#define PPC_PTRACE_PEEKDATA_3264 0x94
	274	#define PPC_PTRACE_POKETEXT_3264 0x93
	275	#define PPC_PTRACE_POKEDATA_3264 0x92
	276	#define PPC_PTRACE_PEEKUSR_3264 0x91
	277	#define PPC_PTRACE_POKEUSR_3264 0x90
1da177e4	278
da80d460	279	#endif /* _ASM_POWERPC_PTRACE_H */