[linux-block.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/uaccess.h>
#include <asm/cacheflush.h>

#include "kernel.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
1da177e4 LT	25	#include <asm/pgtable.h>
1da177e4	26	#include <asm/uaccess.h>
d550bbd4	27	#include <asm/cacheflush.h>
1da177e4	28
c8c8782d SR	29	#include "kernel.h"
c8c8782d SR	30
1da177e4	31	/* #define ALLOW_INIT_TRACING */
1da177e4 LT	32
	33	/*
	34	* Called by kernel/ptrace.c when detaching..
	35	*
	36	* Make sure single step bits etc are not set.
	37	*/
	38	void ptrace_disable(struct task_struct *child)
	39	{
	40	/* nothing to do */
	41	}
	42
8e3fe806 DM	43	enum sparc_regset {
	44	REGSET_GENERAL,
	45	REGSET_FP,
	46	};
	47
	48	static int genregs32_get(struct task_struct *target,
	49	const struct user_regset *regset,
	50	unsigned int pos, unsigned int count,
	51	void kbuf, void __user ubuf)
	52	{
	53	const struct pt_regs *regs = target->thread.kregs;
	54	unsigned long __user *reg_window;
	55	unsigned long *k = kbuf;
	56	unsigned long __user *u = ubuf;
	57	unsigned long reg;
	58
	59	if (target == current)
	60	flush_user_windows();
	61
	62	pos /= sizeof(reg);
	63	count /= sizeof(reg);
	64
	65	if (kbuf) {
	66	for (; count > 0 && pos < 16; count--)
	67	*k++ = regs->u_regs[pos++];
	68
	69	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	70	reg_window -= 16;
8e3fe806 DM	71	for (; count > 0 && pos < 32; count--) {
	72	if (get_user(*k++, &reg_window[pos++]))
	73	return -EFAULT;
	74	}
	75	} else {
	76	for (; count > 0 && pos < 16; count--) {
	77	if (put_user(regs->u_regs[pos++], u++))
	78	return -EFAULT;
	79	}
	80
	81	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	82	reg_window -= 16;
8e3fe806 DM	83	for (; count > 0 && pos < 32; count--) {
	84	if (get_user(reg, &reg_window[pos++]) \|\|
	85	put_user(reg, u++))
	86	return -EFAULT;
	87	}
	88	}
	89	while (count > 0) {
	90	switch (pos) {
	91	case 32: /* PSR */
	92	reg = regs->psr;
	93	break;
	94	case 33: /* PC */
	95	reg = regs->pc;
	96	break;
	97	case 34: /* NPC */
	98	reg = regs->npc;
	99	break;
	100	case 35: /* Y */
	101	reg = regs->y;
	102	break;
	103	case 36: /* WIM */
	104	case 37: /* TBR */
	105	reg = 0;
	106	break;
	107	default:
	108	goto finish;
	109	}
	110
	111	if (kbuf)
	112	*k++ = reg;
	113	else if (put_user(reg, u++))
	114	return -EFAULT;
	115	pos++;
	116	count--;
	117	}
	118	finish:
	119	pos *= sizeof(reg);
	120	count *= sizeof(reg);
	121
	122	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	123	38 * sizeof(reg), -1);
	124	}
	125
	126	static int genregs32_set(struct task_struct *target,
	127	const struct user_regset *regset,
	128	unsigned int pos, unsigned int count,
	129	const void kbuf, const void __user ubuf)
	130	{
	131	struct pt_regs *regs = target->thread.kregs;
	132	unsigned long __user *reg_window;
	133	const unsigned long *k = kbuf;
	134	const unsigned long __user *u = ubuf;
	135	unsigned long reg;
	136
	137	if (target == current)
	138	flush_user_windows();
	139
	140	pos /= sizeof(reg);
	141	count /= sizeof(reg);
	142
	143	if (kbuf) {
	144	for (; count > 0 && pos < 16; count--)
	145	regs->u_regs[pos++] = *k++;
	146
147	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	148	reg_window -= 16;
8e3fe806 DM	149	for (; count > 0 && pos < 32; count--) {
	150	if (put_user(*k++, &reg_window[pos++]))
	151	return -EFAULT;
	152	}
	153	} else {
	154	for (; count > 0 && pos < 16; count--) {
	155	if (get_user(reg, u++))
	156	return -EFAULT;
	157	regs->u_regs[pos++] = reg;
	158	}
	159
	160	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	161	reg_window -= 16;
8e3fe806 DM	162	for (; count > 0 && pos < 32; count--) {
	163	if (get_user(reg, u++) \|\|
	164	put_user(reg, &reg_window[pos++]))
	165	return -EFAULT;
	166	}
	167	}
	168	while (count > 0) {
	169	unsigned long psr;
	170
	171	if (kbuf)
	172	reg = *k++;
	173	else if (get_user(reg, u++))
	174	return -EFAULT;
	175
	176	switch (pos) {
	177	case 32: /* PSR */
	178	psr = regs->psr;
28e61036 DM	179	psr &= ~(PSR_ICC \| PSR_SYSCALL);
28e61036 DM	180	psr \|= (reg & (PSR_ICC \| PSR_SYSCALL));
8e3fe806 DM	181	regs->psr = psr;
	182	break;
	183	case 33: /* PC */
	184	regs->pc = reg;
	185	break;
	186	case 34: /* NPC */
	187	regs->npc = reg;
	188	break;
	189	case 35: /* Y */
	190	regs->y = reg;
	191	break;
	192	case 36: /* WIM */
	193	case 37: /* TBR */
	194	break;
	195	default:
	196	goto finish;
	197	}
	198
	199	pos++;
	200	count--;
	201	}
	202	finish:
	203	pos *= sizeof(reg);
	204	count *= sizeof(reg);
	205
	206	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	207	38 * sizeof(reg), -1);
	208	}
	209
	210	static int fpregs32_get(struct task_struct *target,
	211	const struct user_regset *regset,
	212	unsigned int pos, unsigned int count,
	213	void kbuf, void __user ubuf)
	214	{
	215	const unsigned long *fpregs = target->thread.float_regs;
	216	int ret = 0;
	217
	218	#if 0
	219	if (target == current)
	220	save_and_clear_fpu();
	221	#endif
	222
	223	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	224	fpregs,
	225	0, 32 * sizeof(u32));
	226
	227	if (!ret)
	228	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	229	32 * sizeof(u32),
	230	33 * sizeof(u32));
	231	if (!ret)
	232	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	233	&target->thread.fsr,
	234	33 * sizeof(u32),
	235	34 * sizeof(u32));
	236
	237	if (!ret) {
	238	unsigned long val;
	239
	240	val = (1 << 8) \| (8 << 16);
	241	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	242	&val,
	243	34 * sizeof(u32),
	244	35 * sizeof(u32));
245	}
246
247	if (!ret)
248	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
249	35 * sizeof(u32), -1);
250
251	return ret;
252	}
253
254	static int fpregs32_set(struct task_struct *target,
255	const struct user_regset *regset,
256	unsigned int pos, unsigned int count,
257	const void kbuf, const void __user ubuf)
258	{
259	unsigned long *fpregs = target->thread.float_regs;
260	int ret;
261
262	#if 0
263	if (target == current)
264	save_and_clear_fpu();
265	#endif
266	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
267	fpregs,
268	0, 32 * sizeof(u32));
269	if (!ret)
270	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
271	32 * sizeof(u32),
272	33 * sizeof(u32));
273	if (!ret && count > 0) {
274	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
275	&target->thread.fsr,
276	33 * sizeof(u32),
277	34 * sizeof(u32));
278	}
279
280	if (!ret)
281	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
282	34 * sizeof(u32), -1);
283	return ret;
284	}
285
286	static const struct user_regset sparc32_regsets[] = {
287	/* Format is:
288	* G0 --> G7
289	* O0 --> O7
290	* L0 --> L7
291	* I0 --> I7
292	* PSR, PC, nPC, Y, WIM, TBR
293	*/
294	[REGSET_GENERAL] = {
295	.core_note_type = NT_PRSTATUS,
7d4ee289	296	.n = 38,
8e3fe806 DM	297	.size = sizeof(u32), .align = sizeof(u32),
	298	.get = genregs32_get, .set = genregs32_set
	299	},
	300	/* Format is:
	301	* F0 --> F31
	302	* empty 32-bit word
	303	* FSR (32--bit word)
	304	* FPU QUEUE COUNT (8-bit char)
	305	* FPU QUEUE ENTRYSIZE (8-bit char)
	306	* FPU ENABLED (8-bit char)
	307	* empty 8-bit char
	308	* FPU QUEUE (64 32-bit ints)
	309	*/
	310	[REGSET_FP] = {
	311	.core_note_type = NT_PRFPREG,
7d4ee289	312	.n = 99,
8e3fe806 DM	313	.size = sizeof(u32), .align = sizeof(u32),
	314	.get = fpregs32_get, .set = fpregs32_set
	315	},
	316	};
	317
	318	static const struct user_regset_view user_sparc32_view = {
	319	.name = "sparc", .e_machine = EM_SPARC,
	320	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	321	};
	322
	323	const struct user_regset_view task_user_regset_view(struct task_struct task)
	324	{
	325	return &user_sparc32_view;
	326	}
	327
a9384e23 NK	328	struct fps {
	329	unsigned long regs[32];
	330	unsigned long fsr;
	331	unsigned long flags;
	332	unsigned long extra;
	333	unsigned long fpqd;
	334	struct fq {
	335	unsigned long *insnaddr;
	336	unsigned long insn;
	337	} fpq[16];
	338	};
	339
9b05a69e NK	340	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	341	unsigned long addr, unsigned long data)
1da177e4	342	{
9775369e	343	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	344	void __user *addr2p;
d256eb8d	345	const struct user_regset_view *view;
a9384e23 NK	346	struct pt_regs __user *pregs;
a9384e23 NK	347	struct fps __user *fps;
d256eb8d DM	348	int ret;
d256eb8d DM	349
d786a4a6	350	view = task_user_regset_view(current);
a9384e23 NK	351	addr2p = (void __user *) addr2;
	352	pregs = (struct pt_regs __user *) addr;
	353	fps = (struct fps __user *) addr;
1da177e4 LT	354
1da177e4 LT	355	switch(request) {
1da177e4	356	case PTRACE_GETREGS: {
d256eb8d DM	357	ret = copy_regset_to_user(child, view, REGSET_GENERAL,
	358	32 * sizeof(u32),
	359	4 * sizeof(u32),
	360	&pregs->psr);
	361	if (!ret)
	362	copy_regset_to_user(child, view, REGSET_GENERAL,
	363	1 * sizeof(u32),
	364	15 * sizeof(u32),
	365	&pregs->u_regs[0]);
9775369e	366	break;
1da177e4 LT	367	}
	368
	369	case PTRACE_SETREGS: {
d256eb8d DM	370	ret = copy_regset_from_user(child, view, REGSET_GENERAL,
	371	32 * sizeof(u32),
	372	4 * sizeof(u32),
	373	&pregs->psr);
	374	if (!ret)
	375	copy_regset_from_user(child, view, REGSET_GENERAL,
	376	1 * sizeof(u32),
	377	15 * sizeof(u32),
	378	&pregs->u_regs[0]);
9775369e	379	break;
1da177e4 LT	380	}
	381
	382	case PTRACE_GETFPREGS: {
d256eb8d DM	383	ret = copy_regset_to_user(child, view, REGSET_FP,
	384	0 * sizeof(u32),
	385	32 * sizeof(u32),
	386	&fps->regs[0]);
	387	if (!ret)
	388	ret = copy_regset_to_user(child, view, REGSET_FP,
	389	33 * sizeof(u32),
	390	1 * sizeof(u32),
	391	&fps->fsr);
	392
	393	if (!ret) {
	394	if (__put_user(0, &fps->fpqd) \|\|
	395	__put_user(0, &fps->flags) \|\|
	396	__put_user(0, &fps->extra) \|\|
	397	clear_user(fps->fpq, sizeof(fps->fpq)))
	398	ret = -EFAULT;
1da177e4	399	}
9775369e	400	break;
1da177e4 LT	401	}
	402
	403	case PTRACE_SETFPREGS: {
d256eb8d DM	404	ret = copy_regset_from_user(child, view, REGSET_FP,
	405	0 * sizeof(u32),
	406	32 * sizeof(u32),
	407	&fps->regs[0]);
	408	if (!ret)
	409	ret = copy_regset_from_user(child, view, REGSET_FP,
	410	33 * sizeof(u32),
	411	1 * sizeof(u32),
	412	&fps->fsr);
9775369e	413	break;
1da177e4 LT	414	}
	415
	416	case PTRACE_READTEXT:
9775369e	417	case PTRACE_READDATA:
a9384e23	418	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	419
	420	if (ret == data)
	421	ret = 0;
	422	else if (ret >= 0)
	423	ret = -EIO;
	424	break;
1da177e4 LT	425
1da177e4 LT	426	case PTRACE_WRITETEXT:
9775369e	427	case PTRACE_WRITEDATA:
a9384e23	428	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	429
	430	if (ret == data)
	431	ret = 0;
	432	else if (ret >= 0)
	433	ret = -EIO;
	434	break;
1da177e4	435
9775369e	436	default:
986bef85 DM	437	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	438	request = PTRACE_DETACH;
9775369e DM	439	ret = ptrace_request(child, request, addr, data);
9775369e DM	440	break;
1da177e4 LT	441	}
1da177e4 LT	442
9775369e	443	return ret;
1da177e4 LT	444	}
1da177e4 LT	445
1c133b4b	446	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	447	{
1c133b4b DM	448	int ret = 0;
	449
	450	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	451	if (syscall_exit_p)
	452	tracehook_report_syscall_exit(regs, 0);
	453	else
	454	ret = tracehook_report_syscall_entry(regs);
1da177e4	455	}
1c133b4b DM	456
1c133b4b DM	457	return ret;
1da177e4	458	}