[mirror_ubuntu-hirsute-kernel.git] / arch / sparc / kernel / ptrace_32.c

// SPDX-License-Identifier: GPL-2.0
/* 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 <linux/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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* ptrace.c: Sparc process tracing support.
1da177e4 LT	3	*
8e3fe806	4	* Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
1da177e4 LT	5	*
	6	* Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
	7	* and David Mosberger.
	8	*
5b2afff2	9	* Added Linux support -miguel (weird, eh?, the original code was meant
1da177e4 LT	10	* to emulate SunOS).
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/sched.h>
	15	#include <linux/mm.h>
	16	#include <linux/errno.h>
	17	#include <linux/ptrace.h>
	18	#include <linux/user.h>
	19	#include <linux/smp.h>
1da177e4	20	#include <linux/security.h>
7ed20e1a	21	#include <linux/signal.h>
8e3fe806 DM	22	#include <linux/regset.h>
8e3fe806 DM	23	#include <linux/elf.h>
1c133b4b	24	#include <linux/tracehook.h>
1da177e4 LT	25
1da177e4 LT	26	#include <asm/pgtable.h>
7c0f6ba6	27	#include <linux/uaccess.h>
d550bbd4	28	#include <asm/cacheflush.h>
1da177e4	29
c8c8782d SR	30	#include "kernel.h"
c8c8782d SR	31
1da177e4	32	/* #define ALLOW_INIT_TRACING */
1da177e4 LT	33
	34	/*
	35	* Called by kernel/ptrace.c when detaching..
	36	*
	37	* Make sure single step bits etc are not set.
	38	*/
	39	void ptrace_disable(struct task_struct *child)
	40	{
	41	/* nothing to do */
	42	}
	43
8e3fe806 DM	44	enum sparc_regset {
	45	REGSET_GENERAL,
	46	REGSET_FP,
	47	};
	48
	49	static int genregs32_get(struct task_struct *target,
	50	const struct user_regset *regset,
	51	unsigned int pos, unsigned int count,
	52	void kbuf, void __user ubuf)
	53	{
	54	const struct pt_regs *regs = target->thread.kregs;
	55	unsigned long __user *reg_window;
	56	unsigned long *k = kbuf;
	57	unsigned long __user *u = ubuf;
	58	unsigned long reg;
	59
	60	if (target == current)
	61	flush_user_windows();
	62
	63	pos /= sizeof(reg);
	64	count /= sizeof(reg);
	65
	66	if (kbuf) {
	67	for (; count > 0 && pos < 16; count--)
	68	*k++ = regs->u_regs[pos++];
	69
	70	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	71	reg_window -= 16;
8e3fe806 DM	72	for (; count > 0 && pos < 32; count--) {
	73	if (get_user(*k++, &reg_window[pos++]))
	74	return -EFAULT;
	75	}
	76	} else {
	77	for (; count > 0 && pos < 16; count--) {
	78	if (put_user(regs->u_regs[pos++], u++))
	79	return -EFAULT;
	80	}
	81
	82	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	83	reg_window -= 16;
8e3fe806 DM	84	for (; count > 0 && pos < 32; count--) {
	85	if (get_user(reg, &reg_window[pos++]) \|\|
	86	put_user(reg, u++))
	87	return -EFAULT;
	88	}
	89	}
	90	while (count > 0) {
	91	switch (pos) {
	92	case 32: /* PSR */
	93	reg = regs->psr;
	94	break;
	95	case 33: /* PC */
	96	reg = regs->pc;
	97	break;
	98	case 34: /* NPC */
	99	reg = regs->npc;
	100	break;
	101	case 35: /* Y */
	102	reg = regs->y;
	103	break;
	104	case 36: /* WIM */
	105	case 37: /* TBR */
	106	reg = 0;
	107	break;
	108	default:
	109	goto finish;
	110	}
	111
	112	if (kbuf)
	113	*k++ = reg;
	114	else if (put_user(reg, u++))
	115	return -EFAULT;
	116	pos++;
	117	count--;
	118	}
	119	finish:
	120	pos *= sizeof(reg);
	121	count *= sizeof(reg);
	122
	123	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	124	38 * sizeof(reg), -1);
	125	}
	126
	127	static int genregs32_set(struct task_struct *target,
	128	const struct user_regset *regset,
	129	unsigned int pos, unsigned int count,
	130	const void kbuf, const void __user ubuf)
	131	{
	132	struct pt_regs *regs = target->thread.kregs;
	133	unsigned long __user *reg_window;
	134	const unsigned long *k = kbuf;
	135	const unsigned long __user *u = ubuf;
	136	unsigned long reg;
	137
	138	if (target == current)
	139	flush_user_windows();
	140
	141	pos /= sizeof(reg);
	142	count /= sizeof(reg);
	143
	144	if (kbuf) {
	145	for (; count > 0 && pos < 16; count--)
	146	regs->u_regs[pos++] = *k++;
	147
148	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	149	reg_window -= 16;
8e3fe806 DM	150	for (; count > 0 && pos < 32; count--) {
	151	if (put_user(*k++, &reg_window[pos++]))
	152	return -EFAULT;
	153	}
	154	} else {
	155	for (; count > 0 && pos < 16; count--) {
	156	if (get_user(reg, u++))
	157	return -EFAULT;
	158	regs->u_regs[pos++] = reg;
	159	}
	160
	161	reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
b857bd29	162	reg_window -= 16;
8e3fe806 DM	163	for (; count > 0 && pos < 32; count--) {
	164	if (get_user(reg, u++) \|\|
	165	put_user(reg, &reg_window[pos++]))
	166	return -EFAULT;
	167	}
	168	}
	169	while (count > 0) {
	170	unsigned long psr;
	171
	172	if (kbuf)
	173	reg = *k++;
	174	else if (get_user(reg, u++))
	175	return -EFAULT;
	176
	177	switch (pos) {
	178	case 32: /* PSR */
	179	psr = regs->psr;
28e61036 DM	180	psr &= ~(PSR_ICC \| PSR_SYSCALL);
28e61036 DM	181	psr \|= (reg & (PSR_ICC \| PSR_SYSCALL));
8e3fe806 DM	182	regs->psr = psr;
	183	break;
	184	case 33: /* PC */
	185	regs->pc = reg;
	186	break;
	187	case 34: /* NPC */
	188	regs->npc = reg;
	189	break;
	190	case 35: /* Y */
	191	regs->y = reg;
	192	break;
	193	case 36: /* WIM */
	194	case 37: /* TBR */
	195	break;
	196	default:
	197	goto finish;
	198	}
	199
	200	pos++;
	201	count--;
	202	}
	203	finish:
	204	pos *= sizeof(reg);
	205	count *= sizeof(reg);
	206
	207	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	208	38 * sizeof(reg), -1);
	209	}
	210
	211	static int fpregs32_get(struct task_struct *target,
	212	const struct user_regset *regset,
	213	unsigned int pos, unsigned int count,
	214	void kbuf, void __user ubuf)
	215	{
	216	const unsigned long *fpregs = target->thread.float_regs;
	217	int ret = 0;
	218
	219	#if 0
	220	if (target == current)
	221	save_and_clear_fpu();
	222	#endif
	223
	224	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	225	fpregs,
	226	0, 32 * sizeof(u32));
	227
	228	if (!ret)
	229	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	230	32 * sizeof(u32),
	231	33 * sizeof(u32));
	232	if (!ret)
	233	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	234	&target->thread.fsr,
	235	33 * sizeof(u32),
	236	34 * sizeof(u32));
	237
	238	if (!ret) {
	239	unsigned long val;
	240
	241	val = (1 << 8) \| (8 << 16);
	242	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	243	&val,
	244	34 * sizeof(u32),
	245	35 * sizeof(u32));
246	}
247
248	if (!ret)
249	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
250	35 * sizeof(u32), -1);
251
252	return ret;
253	}
254
255	static int fpregs32_set(struct task_struct *target,
256	const struct user_regset *regset,
257	unsigned int pos, unsigned int count,
258	const void kbuf, const void __user ubuf)
259	{
260	unsigned long *fpregs = target->thread.float_regs;
261	int ret;
262
263	#if 0
264	if (target == current)
265	save_and_clear_fpu();
266	#endif
267	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
268	fpregs,
269	0, 32 * sizeof(u32));
270	if (!ret)
271	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
272	32 * sizeof(u32),
273	33 * sizeof(u32));
274	if (!ret && count > 0) {
275	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
276	&target->thread.fsr,
277	33 * sizeof(u32),
278	34 * sizeof(u32));
279	}
280
281	if (!ret)
282	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
283	34 * sizeof(u32), -1);
284	return ret;
285	}
286
287	static const struct user_regset sparc32_regsets[] = {
288	/* Format is:
289	* G0 --> G7
290	* O0 --> O7
291	* L0 --> L7
292	* I0 --> I7
293	* PSR, PC, nPC, Y, WIM, TBR
294	*/
295	[REGSET_GENERAL] = {
296	.core_note_type = NT_PRSTATUS,
7d4ee289	297	.n = 38,
8e3fe806 DM	298	.size = sizeof(u32), .align = sizeof(u32),
	299	.get = genregs32_get, .set = genregs32_set
	300	},
	301	/* Format is:
	302	* F0 --> F31
	303	* empty 32-bit word
	304	* FSR (32--bit word)
	305	* FPU QUEUE COUNT (8-bit char)
	306	* FPU QUEUE ENTRYSIZE (8-bit char)
	307	* FPU ENABLED (8-bit char)
	308	* empty 8-bit char
	309	* FPU QUEUE (64 32-bit ints)
	310	*/
	311	[REGSET_FP] = {
	312	.core_note_type = NT_PRFPREG,
7d4ee289	313	.n = 99,
8e3fe806 DM	314	.size = sizeof(u32), .align = sizeof(u32),
	315	.get = fpregs32_get, .set = fpregs32_set
	316	},
	317	};
	318
	319	static const struct user_regset_view user_sparc32_view = {
	320	.name = "sparc", .e_machine = EM_SPARC,
	321	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	322	};
	323
	324	const struct user_regset_view task_user_regset_view(struct task_struct task)
	325	{
	326	return &user_sparc32_view;
	327	}
	328
a9384e23 NK	329	struct fps {
	330	unsigned long regs[32];
	331	unsigned long fsr;
	332	unsigned long flags;
	333	unsigned long extra;
	334	unsigned long fpqd;
	335	struct fq {
	336	unsigned long *insnaddr;
	337	unsigned long insn;
	338	} fpq[16];
	339	};
	340
9b05a69e NK	341	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	342	unsigned long addr, unsigned long data)
1da177e4	343	{
9775369e	344	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	345	void __user *addr2p;
d256eb8d	346	const struct user_regset_view *view;
a9384e23 NK	347	struct pt_regs __user *pregs;
a9384e23 NK	348	struct fps __user *fps;
d256eb8d DM	349	int ret;
d256eb8d DM	350
d786a4a6	351	view = task_user_regset_view(current);
a9384e23 NK	352	addr2p = (void __user *) addr2;
	353	pregs = (struct pt_regs __user *) addr;
	354	fps = (struct fps __user *) addr;
1da177e4 LT	355
1da177e4 LT	356	switch(request) {
1da177e4	357	case PTRACE_GETREGS: {
d256eb8d DM	358	ret = copy_regset_to_user(child, view, REGSET_GENERAL,
	359	32 * sizeof(u32),
	360	4 * sizeof(u32),
	361	&pregs->psr);
	362	if (!ret)
	363	copy_regset_to_user(child, view, REGSET_GENERAL,
	364	1 * sizeof(u32),
	365	15 * sizeof(u32),
	366	&pregs->u_regs[0]);
9775369e	367	break;
1da177e4 LT	368	}
	369
	370	case PTRACE_SETREGS: {
d256eb8d DM	371	ret = copy_regset_from_user(child, view, REGSET_GENERAL,
	372	32 * sizeof(u32),
	373	4 * sizeof(u32),
	374	&pregs->psr);
	375	if (!ret)
	376	copy_regset_from_user(child, view, REGSET_GENERAL,
	377	1 * sizeof(u32),
	378	15 * sizeof(u32),
	379	&pregs->u_regs[0]);
9775369e	380	break;
1da177e4 LT	381	}
	382
	383	case PTRACE_GETFPREGS: {
d256eb8d DM	384	ret = copy_regset_to_user(child, view, REGSET_FP,
	385	0 * sizeof(u32),
	386	32 * sizeof(u32),
	387	&fps->regs[0]);
	388	if (!ret)
	389	ret = copy_regset_to_user(child, view, REGSET_FP,
	390	33 * sizeof(u32),
	391	1 * sizeof(u32),
	392	&fps->fsr);
	393
	394	if (!ret) {
	395	if (__put_user(0, &fps->fpqd) \|\|
	396	__put_user(0, &fps->flags) \|\|
	397	__put_user(0, &fps->extra) \|\|
	398	clear_user(fps->fpq, sizeof(fps->fpq)))
	399	ret = -EFAULT;
1da177e4	400	}
9775369e	401	break;
1da177e4 LT	402	}
	403
	404	case PTRACE_SETFPREGS: {
d256eb8d DM	405	ret = copy_regset_from_user(child, view, REGSET_FP,
	406	0 * sizeof(u32),
	407	32 * sizeof(u32),
	408	&fps->regs[0]);
	409	if (!ret)
	410	ret = copy_regset_from_user(child, view, REGSET_FP,
	411	33 * sizeof(u32),
	412	1 * sizeof(u32),
	413	&fps->fsr);
9775369e	414	break;
1da177e4 LT	415	}
	416
	417	case PTRACE_READTEXT:
9775369e	418	case PTRACE_READDATA:
a9384e23	419	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	420
	421	if (ret == data)
	422	ret = 0;
	423	else if (ret >= 0)
	424	ret = -EIO;
	425	break;
1da177e4 LT	426
1da177e4 LT	427	case PTRACE_WRITETEXT:
9775369e	428	case PTRACE_WRITEDATA:
a9384e23	429	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	430
	431	if (ret == data)
	432	ret = 0;
	433	else if (ret >= 0)
	434	ret = -EIO;
	435	break;
1da177e4	436
9775369e	437	default:
986bef85 DM	438	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	439	request = PTRACE_DETACH;
9775369e DM	440	ret = ptrace_request(child, request, addr, data);
9775369e DM	441	break;
1da177e4 LT	442	}
1da177e4 LT	443
9775369e	444	return ret;
1da177e4 LT	445	}
1da177e4 LT	446
1c133b4b	447	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	448	{
1c133b4b DM	449	int ret = 0;
	450
	451	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	452	if (syscall_exit_p)
	453	tracehook_report_syscall_exit(regs, 0);
	454	else
	455	ret = tracehook_report_syscall_entry(regs);
1da177e4	456	}
1c133b4b DM	457
1c133b4b DM	458	return ret;
1da177e4	459	}