[net-next-2.6.git] / arch / sparc / kernel / ptrace_32.c

/* ptrace.c: Sparc process tracing support.
 *
 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
 *
 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
 * and David Mosberger.
 *
 * Added Linux support -miguel (weird, eh?, the original code was meant
 * to emulate SunOS).
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/smp.h>
#include <linux/security.h>
#include <linux/signal.h>
#include <linux/regset.h>
#include <linux/elf.h>
#include <linux/tracehook.h>

#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/uaccess.h>

/* #define ALLOW_INIT_TRACING */

/*
 * Called by kernel/ptrace.c when detaching..
 *
 * Make sure single step bits etc are not set.
 */
void ptrace_disable(struct task_struct *child)
{
	/* nothing to do */
}

enum sparc_regset {
	REGSET_GENERAL,
	REGSET_FP,
};

static int genregs32_get(struct task_struct *target,
			 const struct user_regset *regset,
			 unsigned int pos, unsigned int count,
			 void *kbuf, void __user *ubuf)
{
	const struct pt_regs *regs = target->thread.kregs;
	unsigned long __user *reg_window;
	unsigned long *k = kbuf;
	unsigned long __user *u = ubuf;
	unsigned long reg;

	if (target == current)
		flush_user_windows();

	pos /= sizeof(reg);
	count /= sizeof(reg);

	if (kbuf) {
		for (; count > 0 && pos < 16; count--)
			*k++ = regs->u_regs[pos++];

		reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
		reg_window -= 16;
		for (; count > 0 && pos < 32; count--) {
			if (get_user(*k++, &reg_window[pos++]))
				return -EFAULT;
		}
	} else {
		for (; count > 0 && pos < 16; count--) {
			if (put_user(regs->u_regs[pos++], u++))
				return -EFAULT;
		}

		reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
		reg_window -= 16;
		for (; count > 0 && pos < 32; count--) {
			if (get_user(reg, &reg_window[pos++]) ||
			    put_user(reg, u++))
				return -EFAULT;
		}
	}
	while (count > 0) {
		switch (pos) {
		case 32: /* PSR */
			reg = regs->psr;
			break;
		case 33: /* PC */
			reg = regs->pc;
			break;
		case 34: /* NPC */
			reg = regs->npc;
			break;
		case 35: /* Y */
			reg = regs->y;
			break;
		case 36: /* WIM */
		case 37: /* TBR */
			reg = 0;
			break;
		default:
			goto finish;
		}

		if (kbuf)
			*k++ = reg;
		else if (put_user(reg, u++))
			return -EFAULT;
		pos++;
		count--;
	}
finish:
	pos *= sizeof(reg);
	count *= sizeof(reg);

	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					38 * sizeof(reg), -1);
}

static int genregs32_set(struct task_struct *target,
			 const struct user_regset *regset,
			 unsigned int pos, unsigned int count,
			 const void *kbuf, const void __user *ubuf)
{
	struct pt_regs *regs = target->thread.kregs;
	unsigned long __user *reg_window;
	const unsigned long *k = kbuf;
	const unsigned long __user *u = ubuf;
	unsigned long reg;

	if (target == current)
		flush_user_windows();

	pos /= sizeof(reg);
	count /= sizeof(reg);

	if (kbuf) {
		for (; count > 0 && pos < 16; count--)
			regs->u_regs[pos++] = *k++;

		reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
		reg_window -= 16;
		for (; count > 0 && pos < 32; count--) {
			if (put_user(*k++, &reg_window[pos++]))
				return -EFAULT;
		}
	} else {
		for (; count > 0 && pos < 16; count--) {
			if (get_user(reg, u++))
				return -EFAULT;
			regs->u_regs[pos++] = reg;
		}

		reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
		reg_window -= 16;
		for (; count > 0 && pos < 32; count--) {
			if (get_user(reg, u++) ||
			    put_user(reg, &reg_window[pos++]))
				return -EFAULT;
		}
	}
	while (count > 0) {
		unsigned long psr;

		if (kbuf)
			reg = *k++;
		else if (get_user(reg, u++))
			return -EFAULT;

		switch (pos) {
		case 32: /* PSR */
			psr = regs->psr;
			psr &= ~(PSR_ICC | PSR_SYSCALL);
			psr |= (reg & (PSR_ICC | PSR_SYSCALL));
			regs->psr = psr;
			break;
		case 33: /* PC */
			regs->pc = reg;
			break;
		case 34: /* NPC */
			regs->npc = reg;
			break;
		case 35: /* Y */
			regs->y = reg;
			break;
		case 36: /* WIM */
		case 37: /* TBR */
			break;
		default:
			goto finish;
		}

		pos++;
		count--;
	}
finish:
	pos *= sizeof(reg);
	count *= sizeof(reg);

	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
					 38 * sizeof(reg), -1);
}

static int fpregs32_get(struct task_struct *target,
			const struct user_regset *regset,
			unsigned int pos, unsigned int count,
			void *kbuf, void __user *ubuf)
{
	const unsigned long *fpregs = target->thread.float_regs;
	int ret = 0;

#if 0
	if (target == current)
		save_and_clear_fpu();
#endif

	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  fpregs,
				  0, 32 * sizeof(u32));

	if (!ret)
		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					       32 * sizeof(u32),
					       33 * sizeof(u32));
	if (!ret)
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
					  &target->thread.fsr,
					  33 * sizeof(u32),
					  34 * sizeof(u32));

	if (!ret) {
		unsigned long val;

		val = (1 << 8) | (8 << 16);
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
					  &val,
					  34 * sizeof(u32),
					  35 * sizeof(u32));
	}

	if (!ret)
		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					       35 * sizeof(u32), -1);

	return ret;
}

static int fpregs32_set(struct task_struct *target,
			const struct user_regset *regset,
			unsigned int pos, unsigned int count,
			const void *kbuf, const void __user *ubuf)
{
	unsigned long *fpregs = target->thread.float_regs;
	int ret;

#if 0
	if (target == current)
		save_and_clear_fpu();
#endif
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 fpregs,
				 0, 32 * sizeof(u32));
	if (!ret)
		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
					  32 * sizeof(u32),
					  33 * sizeof(u32));
	if (!ret && count > 0) {
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
					 &target->thread.fsr,
					 33 * sizeof(u32),
					 34 * sizeof(u32));
	}

	if (!ret)
		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
						34 * sizeof(u32), -1);
	return ret;
}

static const struct user_regset sparc32_regsets[] = {
	/* Format is:
	 * 	G0 --> G7
	 *	O0 --> O7
	 *	L0 --> L7
	 *	I0 --> I7
	 *	PSR, PC, nPC, Y, WIM, TBR
	 */
	[REGSET_GENERAL] = {
		.core_note_type = NT_PRSTATUS,
		.n = 38,
		.size = sizeof(u32), .align = sizeof(u32),
		.get = genregs32_get, .set = genregs32_set
	},
	/* Format is:
	 *	F0 --> F31
	 *	empty 32-bit word
	 *	FSR (32--bit word)
	 *	FPU QUEUE COUNT (8-bit char)
	 *	FPU QUEUE ENTRYSIZE (8-bit char)
	 *	FPU ENABLED (8-bit char)
	 *	empty 8-bit char
	 *	FPU QUEUE (64 32-bit ints)
	 */
	[REGSET_FP] = {
		.core_note_type = NT_PRFPREG,
		.n = 99,
		.size = sizeof(u32), .align = sizeof(u32),
		.get = fpregs32_get, .set = fpregs32_set
	},
};

static const struct user_regset_view user_sparc32_view = {
	.name = "sparc", .e_machine = EM_SPARC,
	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
};

const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
	return &user_sparc32_view;
}

struct fps {
	unsigned long regs[32];
	unsigned long fsr;
	unsigned long flags;
	unsigned long extra;
	unsigned long fpqd;
	struct fq {
		unsigned long *insnaddr;
		unsigned long insn;
	} fpq[16];
};

long arch_ptrace(struct task_struct *child, long request,
		 unsigned long addr, unsigned long data)
{
	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
	void __user *addr2p;
	const struct user_regset_view *view;
	struct pt_regs __user *pregs;
	struct fps __user *fps;
	int ret;

	view = task_user_regset_view(current);
	addr2p = (void __user *) addr2;
	pregs = (struct pt_regs __user *) addr;
	fps = (struct fps __user *) addr;

	switch(request) {
	case PTRACE_GETREGS: {
		ret = copy_regset_to_user(child, view, REGSET_GENERAL,
					  32 * sizeof(u32),
					  4 * sizeof(u32),
					  &pregs->psr);
		if (!ret)
			copy_regset_to_user(child, view, REGSET_GENERAL,
					    1 * sizeof(u32),
					    15 * sizeof(u32),
					    &pregs->u_regs[0]);
		break;
	}

	case PTRACE_SETREGS: {
		ret = copy_regset_from_user(child, view, REGSET_GENERAL,
					    32 * sizeof(u32),
					    4 * sizeof(u32),
					    &pregs->psr);
		if (!ret)
			copy_regset_from_user(child, view, REGSET_GENERAL,
					      1 * sizeof(u32),
					      15 * sizeof(u32),
					      &pregs->u_regs[0]);
		break;
	}

	case PTRACE_GETFPREGS: {
		ret = copy_regset_to_user(child, view, REGSET_FP,
					  0 * sizeof(u32),
					  32 * sizeof(u32),
					  &fps->regs[0]);
		if (!ret)
			ret = copy_regset_to_user(child, view, REGSET_FP,
						  33 * sizeof(u32),
						  1 * sizeof(u32),
						  &fps->fsr);

		if (!ret) {
			if (__put_user(0, &fps->fpqd) ||
			    __put_user(0, &fps->flags) ||
			    __put_user(0, &fps->extra) ||
			    clear_user(fps->fpq, sizeof(fps->fpq)))
				ret = -EFAULT;
		}
		break;
	}

	case PTRACE_SETFPREGS: {
		ret = copy_regset_from_user(child, view, REGSET_FP,
					    0 * sizeof(u32),
					    32 * sizeof(u32),
					    &fps->regs[0]);
		if (!ret)
			ret = copy_regset_from_user(child, view, REGSET_FP,
						    33 * sizeof(u32),
						    1 * sizeof(u32),
						    &fps->fsr);
		break;
	}

	case PTRACE_READTEXT:
	case PTRACE_READDATA:
		ret = ptrace_readdata(child, addr, addr2p, data);

		if (ret == data)
			ret = 0;
		else if (ret >= 0)
			ret = -EIO;
		break;

	case PTRACE_WRITETEXT:
	case PTRACE_WRITEDATA:
		ret = ptrace_writedata(child, addr2p, addr, data);

		if (ret == data)
			ret = 0;
		else if (ret >= 0)
			ret = -EIO;
		break;

	default:
		if (request == PTRACE_SPARC_DETACH)
			request = PTRACE_DETACH;
		ret = ptrace_request(child, request, addr, data);
		break;
	}

	return ret;
}

asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
{
	int ret = 0;

	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
		if (syscall_exit_p)
			tracehook_report_syscall_exit(regs, 0);
		else
			ret = tracehook_report_syscall_entry(regs);
	}

	return ret;
}
Commit	Line	Data
1da177e4 LT	1	/* ptrace.c: Sparc process tracing support.
1da177e4 LT	2	*
8e3fe806	3	* Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
1da177e4 LT	4	*
	5	* Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
	6	* and David Mosberger.
	7	*
5b2afff2	8	* Added Linux support -miguel (weird, eh?, the original code was meant
1da177e4 LT	9	* to emulate SunOS).
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/sched.h>
	14	#include <linux/mm.h>
	15	#include <linux/errno.h>
	16	#include <linux/ptrace.h>
	17	#include <linux/user.h>
	18	#include <linux/smp.h>
1da177e4	19	#include <linux/security.h>
7ed20e1a	20	#include <linux/signal.h>
8e3fe806 DM	21	#include <linux/regset.h>
8e3fe806 DM	22	#include <linux/elf.h>
1c133b4b	23	#include <linux/tracehook.h>
1da177e4 LT	24
	25	#include <asm/pgtable.h>
	26	#include <asm/system.h>
	27	#include <asm/uaccess.h>
	28
1da177e4	29	/* #define ALLOW_INIT_TRACING */
1da177e4 LT	30
	31	/*
	32	* Called by kernel/ptrace.c when detaching..
	33	*
	34	* Make sure single step bits etc are not set.
	35	*/
	36	void ptrace_disable(struct task_struct *child)
	37	{
	38	/* nothing to do */
	39	}
	40
8e3fe806 DM	41	enum sparc_regset {
	42	REGSET_GENERAL,
	43	REGSET_FP,
	44	};
	45
	46	static int genregs32_get(struct task_struct *target,
	47	const struct user_regset *regset,
	48	unsigned int pos, unsigned int count,
	49	void kbuf, void __user ubuf)
	50	{
	51	const struct pt_regs *regs = target->thread.kregs;
	52	unsigned long __user *reg_window;
	53	unsigned long *k = kbuf;
	54	unsigned long __user *u = ubuf;
	55	unsigned long reg;
	56
	57	if (target == current)
	58	flush_user_windows();
	59
	60	pos /= sizeof(reg);
	61	count /= sizeof(reg);
	62
	63	if (kbuf) {
	64	for (; count > 0 && pos < 16; count--)
	65	*k++ = regs->u_regs[pos++];
	66
	67	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	68	reg_window -= 16;
8e3fe806 DM	69	for (; count > 0 && pos < 32; count--) {
	70	if (get_user(*k++, &reg_window[pos++]))
	71	return -EFAULT;
	72	}
	73	} else {
	74	for (; count > 0 && pos < 16; count--) {
	75	if (put_user(regs->u_regs[pos++], u++))
	76	return -EFAULT;
	77	}
	78
	79	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	80	reg_window -= 16;
8e3fe806 DM	81	for (; count > 0 && pos < 32; count--) {
	82	if (get_user(reg, &reg_window[pos++]) \|\|
	83	put_user(reg, u++))
	84	return -EFAULT;
	85	}
	86	}
	87	while (count > 0) {
	88	switch (pos) {
	89	case 32: /* PSR */
	90	reg = regs->psr;
	91	break;
	92	case 33: /* PC */
	93	reg = regs->pc;
	94	break;
	95	case 34: /* NPC */
	96	reg = regs->npc;
	97	break;
	98	case 35: /* Y */
	99	reg = regs->y;
	100	break;
	101	case 36: /* WIM */
	102	case 37: /* TBR */
	103	reg = 0;
	104	break;
	105	default:
	106	goto finish;
	107	}
	108
	109	if (kbuf)
	110	*k++ = reg;
	111	else if (put_user(reg, u++))
	112	return -EFAULT;
	113	pos++;
	114	count--;
	115	}
	116	finish:
	117	pos *= sizeof(reg);
	118	count *= sizeof(reg);
	119
	120	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	121	38 * sizeof(reg), -1);
	122	}
	123
	124	static int genregs32_set(struct task_struct *target,
	125	const struct user_regset *regset,
	126	unsigned int pos, unsigned int count,
	127	const void kbuf, const void __user ubuf)
	128	{
	129	struct pt_regs *regs = target->thread.kregs;
	130	unsigned long __user *reg_window;
	131	const unsigned long *k = kbuf;
	132	const unsigned long __user *u = ubuf;
	133	unsigned long reg;
	134
	135	if (target == current)
	136	flush_user_windows();
	137
	138	pos /= sizeof(reg);
	139	count /= sizeof(reg);
	140
	141	if (kbuf) {
	142	for (; count > 0 && pos < 16; count--)
	143	regs->u_regs[pos++] = *k++;
	144
145	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	146	reg_window -= 16;
8e3fe806 DM	147	for (; count > 0 && pos < 32; count--) {
	148	if (put_user(*k++, &reg_window[pos++]))
	149	return -EFAULT;
	150	}
	151	} else {
	152	for (; count > 0 && pos < 16; count--) {
	153	if (get_user(reg, u++))
	154	return -EFAULT;
	155	regs->u_regs[pos++] = reg;
	156	}
	157
	158	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	159	reg_window -= 16;
8e3fe806 DM	160	for (; count > 0 && pos < 32; count--) {
	161	if (get_user(reg, u++) \|\|
	162	put_user(reg, &reg_window[pos++]))
	163	return -EFAULT;
	164	}
	165	}
	166	while (count > 0) {
	167	unsigned long psr;
	168
	169	if (kbuf)
	170	reg = *k++;
	171	else if (get_user(reg, u++))
	172	return -EFAULT;
	173
	174	switch (pos) {
	175	case 32: /* PSR */
	176	psr = regs->psr;
28e61036 DM	177	psr &= ~(PSR_ICC \| PSR_SYSCALL);
28e61036 DM	178	psr \|= (reg & (PSR_ICC \| PSR_SYSCALL));
8e3fe806 DM	179	regs->psr = psr;
	180	break;
	181	case 33: /* PC */
	182	regs->pc = reg;
	183	break;
	184	case 34: /* NPC */
	185	regs->npc = reg;
	186	break;
	187	case 35: /* Y */
	188	regs->y = reg;
	189	break;
	190	case 36: /* WIM */
	191	case 37: /* TBR */
	192	break;
	193	default:
	194	goto finish;
	195	}
	196
	197	pos++;
	198	count--;
	199	}
	200	finish:
	201	pos *= sizeof(reg);
	202	count *= sizeof(reg);
	203
	204	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	205	38 * sizeof(reg), -1);
	206	}
	207
	208	static int fpregs32_get(struct task_struct *target,
	209	const struct user_regset *regset,
	210	unsigned int pos, unsigned int count,
	211	void kbuf, void __user ubuf)
	212	{
	213	const unsigned long *fpregs = target->thread.float_regs;
	214	int ret = 0;
	215
	216	#if 0
	217	if (target == current)
	218	save_and_clear_fpu();
	219	#endif
	220
	221	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	222	fpregs,
	223	0, 32 * sizeof(u32));
	224
	225	if (!ret)
	226	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	227	32 * sizeof(u32),
	228	33 * sizeof(u32));
	229	if (!ret)
	230	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	231	&target->thread.fsr,
	232	33 * sizeof(u32),
	233	34 * sizeof(u32));
	234
	235	if (!ret) {
	236	unsigned long val;
	237
	238	val = (1 << 8) \| (8 << 16);
	239	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	240	&val,
	241	34 * sizeof(u32),
	242	35 * sizeof(u32));
243	}
244
245	if (!ret)
246	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
247	35 * sizeof(u32), -1);
248
249	return ret;
250	}
251
252	static int fpregs32_set(struct task_struct *target,
253	const struct user_regset *regset,
254	unsigned int pos, unsigned int count,
255	const void kbuf, const void __user ubuf)
256	{
257	unsigned long *fpregs = target->thread.float_regs;
258	int ret;
259
260	#if 0
261	if (target == current)
262	save_and_clear_fpu();
263	#endif
264	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
265	fpregs,
266	0, 32 * sizeof(u32));
267	if (!ret)
268	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
269	32 * sizeof(u32),
270	33 * sizeof(u32));
271	if (!ret && count > 0) {
272	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
273	&target->thread.fsr,
274	33 * sizeof(u32),
275	34 * sizeof(u32));
276	}
277
278	if (!ret)
279	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
280	34 * sizeof(u32), -1);
281	return ret;
282	}
283
284	static const struct user_regset sparc32_regsets[] = {
285	/* Format is:
286	* G0 --> G7
287	* O0 --> O7
288	* L0 --> L7
289	* I0 --> I7
290	* PSR, PC, nPC, Y, WIM, TBR
291	*/
292	[REGSET_GENERAL] = {
293	.core_note_type = NT_PRSTATUS,
7d4ee289	294	.n = 38,
8e3fe806 DM	295	.size = sizeof(u32), .align = sizeof(u32),
	296	.get = genregs32_get, .set = genregs32_set
	297	},
	298	/* Format is:
	299	* F0 --> F31
	300	* empty 32-bit word
	301	* FSR (32--bit word)
	302	* FPU QUEUE COUNT (8-bit char)
	303	* FPU QUEUE ENTRYSIZE (8-bit char)
	304	* FPU ENABLED (8-bit char)
	305	* empty 8-bit char
	306	* FPU QUEUE (64 32-bit ints)
	307	*/
	308	[REGSET_FP] = {
	309	.core_note_type = NT_PRFPREG,
7d4ee289	310	.n = 99,
8e3fe806 DM	311	.size = sizeof(u32), .align = sizeof(u32),
	312	.get = fpregs32_get, .set = fpregs32_set
	313	},
	314	};
	315
	316	static const struct user_regset_view user_sparc32_view = {
	317	.name = "sparc", .e_machine = EM_SPARC,
	318	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	319	};
	320
	321	const struct user_regset_view task_user_regset_view(struct task_struct task)
	322	{
	323	return &user_sparc32_view;
	324	}
	325
a9384e23 NK	326	struct fps {
	327	unsigned long regs[32];
	328	unsigned long fsr;
	329	unsigned long flags;
	330	unsigned long extra;
	331	unsigned long fpqd;
	332	struct fq {
	333	unsigned long *insnaddr;
	334	unsigned long insn;
	335	} fpq[16];
	336	};
	337
9b05a69e NK	338	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	339	unsigned long addr, unsigned long data)
1da177e4	340	{
9775369e	341	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	342	void __user *addr2p;
d256eb8d	343	const struct user_regset_view *view;
a9384e23 NK	344	struct pt_regs __user *pregs;
a9384e23 NK	345	struct fps __user *fps;
d256eb8d DM	346	int ret;
d256eb8d DM	347
d786a4a6	348	view = task_user_regset_view(current);
a9384e23 NK	349	addr2p = (void __user *) addr2;
	350	pregs = (struct pt_regs __user *) addr;
	351	fps = (struct fps __user *) addr;
1da177e4 LT	352
1da177e4 LT	353	switch(request) {
1da177e4	354	case PTRACE_GETREGS: {
d256eb8d DM	355	ret = copy_regset_to_user(child, view, REGSET_GENERAL,
	356	32 * sizeof(u32),
	357	4 * sizeof(u32),
	358	&pregs->psr);
	359	if (!ret)
	360	copy_regset_to_user(child, view, REGSET_GENERAL,
	361	1 * sizeof(u32),
	362	15 * sizeof(u32),
	363	&pregs->u_regs[0]);
9775369e	364	break;
1da177e4 LT	365	}
	366
	367	case PTRACE_SETREGS: {
d256eb8d DM	368	ret = copy_regset_from_user(child, view, REGSET_GENERAL,
	369	32 * sizeof(u32),
	370	4 * sizeof(u32),
	371	&pregs->psr);
	372	if (!ret)
	373	copy_regset_from_user(child, view, REGSET_GENERAL,
	374	1 * sizeof(u32),
	375	15 * sizeof(u32),
	376	&pregs->u_regs[0]);
9775369e	377	break;
1da177e4 LT	378	}
	379
	380	case PTRACE_GETFPREGS: {
d256eb8d DM	381	ret = copy_regset_to_user(child, view, REGSET_FP,
	382	0 * sizeof(u32),
	383	32 * sizeof(u32),
	384	&fps->regs[0]);
	385	if (!ret)
	386	ret = copy_regset_to_user(child, view, REGSET_FP,
	387	33 * sizeof(u32),
	388	1 * sizeof(u32),
	389	&fps->fsr);
	390
	391	if (!ret) {
	392	if (__put_user(0, &fps->fpqd) \|\|
	393	__put_user(0, &fps->flags) \|\|
	394	__put_user(0, &fps->extra) \|\|
	395	clear_user(fps->fpq, sizeof(fps->fpq)))
	396	ret = -EFAULT;
1da177e4	397	}
9775369e	398	break;
1da177e4 LT	399	}
	400
	401	case PTRACE_SETFPREGS: {
d256eb8d DM	402	ret = copy_regset_from_user(child, view, REGSET_FP,
	403	0 * sizeof(u32),
	404	32 * sizeof(u32),
	405	&fps->regs[0]);
	406	if (!ret)
	407	ret = copy_regset_from_user(child, view, REGSET_FP,
	408	33 * sizeof(u32),
	409	1 * sizeof(u32),
	410	&fps->fsr);
9775369e	411	break;
1da177e4 LT	412	}
	413
	414	case PTRACE_READTEXT:
9775369e	415	case PTRACE_READDATA:
a9384e23	416	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	417
	418	if (ret == data)
	419	ret = 0;
	420	else if (ret >= 0)
	421	ret = -EIO;
	422	break;
1da177e4 LT	423
1da177e4 LT	424	case PTRACE_WRITETEXT:
9775369e	425	case PTRACE_WRITEDATA:
a9384e23	426	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	427
	428	if (ret == data)
	429	ret = 0;
	430	else if (ret >= 0)
	431	ret = -EIO;
	432	break;
1da177e4	433
9775369e	434	default:
986bef85 DM	435	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	436	request = PTRACE_DETACH;
9775369e DM	437	ret = ptrace_request(child, request, addr, data);
9775369e DM	438	break;
1da177e4 LT	439	}
1da177e4 LT	440
9775369e	441	return ret;
1da177e4 LT	442	}
1da177e4 LT	443
1c133b4b	444	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	445	{
1c133b4b DM	446	int ret = 0;
	447
	448	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	449	if (syscall_exit_p)
	450	tracehook_report_syscall_exit(regs, 0);
	451	else
	452	ret = tracehook_report_syscall_entry(regs);
1da177e4	453	}
1c133b4b DM	454
1c133b4b DM	455	return ret;
1da177e4	456	}