[linux-block.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/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 regwindow32_get(struct task_struct *target,
			   const struct pt_regs *regs,
			   u32 *uregs)
{
	unsigned long reg_window = regs->u_regs[UREG_I6];
	int size = 16 * sizeof(u32);

	if (target == current) {
		if (copy_from_user(uregs, (void __user *)reg_window, size))
			return -EFAULT;
	} else {
		if (access_process_vm(target, reg_window, uregs, size,
				      FOLL_FORCE) != size)
			return -EFAULT;
	}
	return 0;
}

static int regwindow32_set(struct task_struct *target,
			   const struct pt_regs *regs,
			   u32 *uregs)
{
	unsigned long reg_window = regs->u_regs[UREG_I6];
	int size = 16 * sizeof(u32);

	if (target == current) {
		if (copy_to_user((void __user *)reg_window, uregs, size))
			return -EFAULT;
	} else {
		if (access_process_vm(target, reg_window, uregs, size,
				      FOLL_FORCE | FOLL_WRITE) != size)
			return -EFAULT;
	}
	return 0;
}

static int genregs32_get(struct task_struct *target,
			 const struct user_regset *regset,
			 struct membuf to)
{
	const struct pt_regs *regs = target->thread.kregs;
	u32 uregs[16];

	if (target == current)
		flush_user_windows();

	membuf_write(&to, regs->u_regs, 16 * sizeof(u32));
	if (!to.left)
		return 0;
	if (regwindow32_get(target, regs, uregs))
		return -EFAULT;
	membuf_write(&to, uregs, 16 * sizeof(u32));
	membuf_store(&to, regs->psr);
	membuf_store(&to, regs->pc);
	membuf_store(&to, regs->npc);
	membuf_store(&to, regs->y);
	return membuf_zero(&to, 2 * sizeof(u32));
}

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;
	u32 uregs[16];
	u32 psr;
	int ret;

	if (target == current)
		flush_user_windows();

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 regs->u_regs,
				 0, 16 * sizeof(u32));
	if (ret || !count)
		return ret;

	if (regwindow32_get(target, regs, uregs))
		return -EFAULT;
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 uregs,
				 16 * sizeof(u32), 32 * sizeof(u32));
	if (ret)
		return ret;
	if (regwindow32_set(target, regs, uregs))
		return -EFAULT;
	if (!count)
		return 0;

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &psr,
				 32 * sizeof(u32), 33 * sizeof(u32));
	if (ret)
		return ret;
	regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
		    (psr & (PSR_ICC | PSR_SYSCALL));
	if (!count)
		return 0;
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &regs->pc,
				 33 * sizeof(u32), 34 * sizeof(u32));
	if (ret || !count)
		return ret;
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &regs->npc,
				 34 * sizeof(u32), 35 * sizeof(u32));
	if (ret || !count)
		return ret;
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &regs->y,
				 35 * sizeof(u32), 36 * sizeof(u32));
	if (ret || !count)
		return ret;
	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 36 * sizeof(u32),
				  38 * sizeof(u32));
	return 0;
}

static int fpregs32_get(struct task_struct *target,
			const struct user_regset *regset,
			struct membuf to)
{
#if 0
	if (target == current)
		save_and_clear_fpu();
#endif

	membuf_write(&to, target->thread.float_regs, 32 * sizeof(u32));
	membuf_zero(&to, sizeof(u32));
	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	membuf_store(&to, (u32)((1 << 8) | (8 << 16)));
	return membuf_zero(&to, 64 * sizeof(u32));
}

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)
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
					 &target->thread.fsr,
					 33 * sizeof(u32),
					 34 * sizeof(u32));
	if (!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),
		.regset_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),
		.regset_get = fpregs32_get, .set = fpregs32_set
	},
};

static int getregs_get(struct task_struct *target,
			 const struct user_regset *regset,
			 struct membuf to)
{
	const struct pt_regs *regs = target->thread.kregs;

	if (target == current)
		flush_user_windows();

	membuf_store(&to, regs->psr);
	membuf_store(&to, regs->pc);
	membuf_store(&to, regs->npc);
	membuf_store(&to, regs->y);
	return membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u32));
}

static int setregs_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;
	u32 v[4];
	int ret;

	if (target == current)
		flush_user_windows();

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 v,
				 0, 4 * sizeof(u32));
	if (ret)
		return ret;
	regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
		    (v[0] & (PSR_ICC | PSR_SYSCALL));
	regs->pc = v[1];
	regs->npc = v[2];
	regs->y = v[3];
	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 regs->u_regs + 1,
				 4 * sizeof(u32) , 19 * sizeof(u32));
}

static int getfpregs_get(struct task_struct *target,
			const struct user_regset *regset,
			struct membuf to)
{
#if 0
	if (target == current)
		save_and_clear_fpu();
#endif
	membuf_write(&to, &target->thread.float_regs, 32 * sizeof(u32));
	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	return membuf_zero(&to, 35 * sizeof(u32));
}

static int setfpregs_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)
		return ret;
	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &target->thread.fsr,
				 32 * sizeof(u32),
				 33 * sizeof(u32));
}

static const struct user_regset ptrace32_regsets[] = {
	[REGSET_GENERAL] = {
		.n = 19, .size = sizeof(u32),
		.regset_get = getregs_get, .set = setregs_set,
	},
	[REGSET_FP] = {
		.n = 68, .size = sizeof(u32),
		.regset_get = getfpregs_get, .set = setfpregs_set,
	},
};

static const struct user_regset_view ptrace32_view = {
	.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
};

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;
	struct pt_regs __user *pregs;
	struct fps __user *fps;
	int ret;

	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, &ptrace32_view,
					  REGSET_GENERAL, 0,
					  19 * sizeof(u32),
					  pregs);
		break;
	}

	case PTRACE_SETREGS: {
		ret = copy_regset_from_user(child, &ptrace32_view,
					    REGSET_GENERAL, 0,
					    19 * sizeof(u32),
					    pregs);
		break;
	}

	case PTRACE_GETFPREGS: {
		ret = copy_regset_to_user(child, &ptrace32_view,
					  REGSET_FP, 0,
					  68 * sizeof(u32),
					  fps);
		break;
	}

	case PTRACE_SETFPREGS: {
		ret = copy_regset_from_user(child, &ptrace32_view,
					  REGSET_FP, 0,
					  33 * sizeof(u32),
					  fps);
		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)
			ptrace_report_syscall_exit(regs, 0);
		else
			ret = ptrace_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>
1da177e4	24
7c0f6ba6	25	#include <linux/uaccess.h>
d550bbd4	26	#include <asm/cacheflush.h>
1da177e4	27
c8c8782d SR	28	#include "kernel.h"
c8c8782d SR	29
1da177e4	30	/* #define ALLOW_INIT_TRACING */
1da177e4 LT	31
	32	/*
	33	* Called by kernel/ptrace.c when detaching..
	34	*
	35	* Make sure single step bits etc are not set.
	36	*/
	37	void ptrace_disable(struct task_struct *child)
	38	{
	39	/* nothing to do */
	40	}
	41
8e3fe806 DM	42	enum sparc_regset {
	43	REGSET_GENERAL,
	44	REGSET_FP,
	45	};
	46
cf51e129 AV	47	static int regwindow32_get(struct task_struct *target,
	48	const struct pt_regs *regs,
	49	u32 *uregs)
	50	{
	51	unsigned long reg_window = regs->u_regs[UREG_I6];
	52	int size = 16 * sizeof(u32);
	53
	54	if (target == current) {
	55	if (copy_from_user(uregs, (void __user *)reg_window, size))
	56	return -EFAULT;
	57	} else {
	58	if (access_process_vm(target, reg_window, uregs, size,
	59	FOLL_FORCE) != size)
	60	return -EFAULT;
	61	}
	62	return 0;
	63	}
	64
	65	static int regwindow32_set(struct task_struct *target,
	66	const struct pt_regs *regs,
	67	u32 *uregs)
	68	{
	69	unsigned long reg_window = regs->u_regs[UREG_I6];
	70	int size = 16 * sizeof(u32);
	71
	72	if (target == current) {
	73	if (copy_to_user((void __user *)reg_window, uregs, size))
	74	return -EFAULT;
	75	} else {
	76	if (access_process_vm(target, reg_window, uregs, size,
	77	FOLL_FORCE \| FOLL_WRITE) != size)
	78	return -EFAULT;
	79	}
	80	return 0;
	81	}
	82
8e3fe806 DM	83	static int genregs32_get(struct task_struct *target,
8e3fe806 DM	84	const struct user_regset *regset,
4d617aaa	85	struct membuf to)
8e3fe806 DM	86	{
8e3fe806 DM	87	const struct pt_regs *regs = target->thread.kregs;
cf51e129	88	u32 uregs[16];
8e3fe806 DM	89
	90	if (target == current)
	91	flush_user_windows();
	92
4d617aaa AV	93	membuf_write(&to, regs->u_regs, 16 * sizeof(u32));
	94	if (!to.left)
	95	return 0;
87d80533 AV	96	if (regwindow32_get(target, regs, uregs))
87d80533 AV	97	return -EFAULT;
4d617aaa AV	98	membuf_write(&to, uregs, 16 * sizeof(u32));
	99	membuf_store(&to, regs->psr);
	100	membuf_store(&to, regs->pc);
	101	membuf_store(&to, regs->npc);
	102	membuf_store(&to, regs->y);
	103	return membuf_zero(&to, 2 * sizeof(u32));
8e3fe806 DM	104	}
	105
	106	static int genregs32_set(struct task_struct *target,
	107	const struct user_regset *regset,
	108	unsigned int pos, unsigned int count,
	109	const void kbuf, const void __user ubuf)
	110	{
	111	struct pt_regs *regs = target->thread.kregs;
cf51e129 AV	112	u32 uregs[16];
	113	u32 psr;
	114	int ret;
8e3fe806 DM	115
	116	if (target == current)
	117	flush_user_windows();
	118
cf51e129 AV	119	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	120	regs->u_regs,
	121	0, 16 * sizeof(u32));
	122	if (ret \|\| !count)
	123	return ret;
8e3fe806	124
98a7fbf3 AV	125	if (regwindow32_get(target, regs, uregs))
	126	return -EFAULT;
	127	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	128	uregs,
	129	16 * sizeof(u32), 32 * sizeof(u32));
	130	if (ret)
	131	return ret;
	132	if (regwindow32_set(target, regs, uregs))
	133	return -EFAULT;
	134	if (!count)
	135	return 0;
	136
cf51e129 AV	137	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	138	&psr,
	139	32 * sizeof(u32), 33 * sizeof(u32));
	140	if (ret)
	141	return ret;
	142	regs->psr = (regs->psr & ~(PSR_ICC \| PSR_SYSCALL)) \|
	143	(psr & (PSR_ICC \| PSR_SYSCALL));
	144	if (!count)
	145	return 0;
	146	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	147	&regs->pc,
	148	33 * sizeof(u32), 34 * sizeof(u32));
	149	if (ret \|\| !count)
	150	return ret;
	151	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
9d964e1b	152	&regs->npc,
cf51e129 AV	153	34 * sizeof(u32), 35 * sizeof(u32));
	154	if (ret \|\| !count)
	155	return ret;
9d964e1b AV	156	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	157	&regs->y,
	158	35 * sizeof(u32), 36 * sizeof(u32));
	159	if (ret \|\| !count)
	160	return ret;
37f65303 SS	161	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 36 * sizeof(u32),
	162	38 * sizeof(u32));
	163	return 0;
8e3fe806 DM	164	}
	165
	166	static int fpregs32_get(struct task_struct *target,
	167	const struct user_regset *regset,
4d617aaa	168	struct membuf to)
8e3fe806	169	{
8e3fe806 DM	170	#if 0
	171	if (target == current)
	172	save_and_clear_fpu();
	173	#endif
	174
4d617aaa AV	175	membuf_write(&to, target->thread.float_regs, 32 * sizeof(u32));
	176	membuf_zero(&to, sizeof(u32));
	177	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	178	membuf_store(&to, (u32)((1 << 8) \| (8 << 16)));
	179	return membuf_zero(&to, 64 * sizeof(u32));
8e3fe806 DM	180	}
	181
	182	static int fpregs32_set(struct task_struct *target,
	183	const struct user_regset *regset,
	184	unsigned int pos, unsigned int count,
	185	const void kbuf, const void __user ubuf)
	186	{
	187	unsigned long *fpregs = target->thread.float_regs;
	188	int ret;
	189
	190	#if 0
	191	if (target == current)
	192	save_and_clear_fpu();
	193	#endif
	194	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	195	fpregs,
	196	0, 32 * sizeof(u32));
	197	if (!ret)
	198	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	199	32 * sizeof(u32),
	200	33 * sizeof(u32));
98a7fbf3	201	if (!ret)
8e3fe806 DM	202	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	203	&target->thread.fsr,
	204	33 * sizeof(u32),
	205	34 * sizeof(u32));
8e3fe806	206	if (!ret)
37f65303 SS	207	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
37f65303 SS	208	34 * sizeof(u32), -1);
8e3fe806 DM	209	return ret;
	210	}
	211
	212	static const struct user_regset sparc32_regsets[] = {
	213	/* Format is:
	214	* G0 --> G7
	215	* O0 --> O7
	216	* L0 --> L7
	217	* I0 --> I7
	218	* PSR, PC, nPC, Y, WIM, TBR
	219	*/
	220	[REGSET_GENERAL] = {
	221	.core_note_type = NT_PRSTATUS,
7d4ee289	222	.n = 38,
8e3fe806	223	.size = sizeof(u32), .align = sizeof(u32),
4d617aaa	224	.regset_get = genregs32_get, .set = genregs32_set
8e3fe806 DM	225	},
	226	/* Format is:
	227	* F0 --> F31
	228	* empty 32-bit word
	229	* FSR (32--bit word)
	230	* FPU QUEUE COUNT (8-bit char)
	231	* FPU QUEUE ENTRYSIZE (8-bit char)
	232	* FPU ENABLED (8-bit char)
	233	* empty 8-bit char
	234	* FPU QUEUE (64 32-bit ints)
	235	*/
	236	[REGSET_FP] = {
	237	.core_note_type = NT_PRFPREG,
7d4ee289	238	.n = 99,
8e3fe806	239	.size = sizeof(u32), .align = sizeof(u32),
4d617aaa	240	.regset_get = fpregs32_get, .set = fpregs32_set
8e3fe806 DM	241	},
	242	};
	243
87d80533 AV	244	static int getregs_get(struct task_struct *target,
87d80533 AV	245	const struct user_regset *regset,
4d617aaa	246	struct membuf to)
87d80533 AV	247	{
87d80533 AV	248	const struct pt_regs *regs = target->thread.kregs;
87d80533 AV	249
	250	if (target == current)
	251	flush_user_windows();
	252
4d617aaa AV	253	membuf_store(&to, regs->psr);
	254	membuf_store(&to, regs->pc);
	255	membuf_store(&to, regs->npc);
	256	membuf_store(&to, regs->y);
	257	return membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u32));
87d80533 AV	258	}
87d80533 AV	259
98a7fbf3 AV	260	static int setregs_set(struct task_struct *target,
	261	const struct user_regset *regset,
	262	unsigned int pos, unsigned int count,
	263	const void kbuf, const void __user ubuf)
	264	{
	265	struct pt_regs *regs = target->thread.kregs;
	266	u32 v[4];
	267	int ret;
	268
	269	if (target == current)
	270	flush_user_windows();
	271
	272	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	273	v,
	274	0, 4 * sizeof(u32));
	275	if (ret)
	276	return ret;
	277	regs->psr = (regs->psr & ~(PSR_ICC \| PSR_SYSCALL)) \|
	278	(v[0] & (PSR_ICC \| PSR_SYSCALL));
	279	regs->pc = v[1];
	280	regs->npc = v[2];
	281	regs->y = v[3];
	282	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	283	regs->u_regs + 1,
	284	4 * sizeof(u32) , 19 * sizeof(u32));
	285	}
	286
87d80533 AV	287	static int getfpregs_get(struct task_struct *target,
87d80533 AV	288	const struct user_regset *regset,
4d617aaa	289	struct membuf to)
87d80533	290	{
87d80533 AV	291	#if 0
	292	if (target == current)
	293	save_and_clear_fpu();
	294	#endif
4d617aaa AV	295	membuf_write(&to, &target->thread.float_regs, 32 * sizeof(u32));
	296	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	297	return membuf_zero(&to, 35 * sizeof(u32));
87d80533 AV	298	}
87d80533 AV	299
98a7fbf3 AV	300	static int setfpregs_set(struct task_struct *target,
	301	const struct user_regset *regset,
	302	unsigned int pos, unsigned int count,
	303	const void kbuf, const void __user ubuf)
	304	{
	305	unsigned long *fpregs = target->thread.float_regs;
	306	int ret;
	307
	308	#if 0
	309	if (target == current)
	310	save_and_clear_fpu();
	311	#endif
	312	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	313	fpregs,
	314	0, 32 * sizeof(u32));
	315	if (ret)
	316	return ret;
	317	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	318	&target->thread.fsr,
	319	32 * sizeof(u32),
	320	33 * sizeof(u32));
	321	}
	322
87d80533 AV	323	static const struct user_regset ptrace32_regsets[] = {
87d80533 AV	324	[REGSET_GENERAL] = {
98a7fbf3	325	.n = 19, .size = sizeof(u32),
4d617aaa	326	.regset_get = getregs_get, .set = setregs_set,
87d80533 AV	327	},
87d80533 AV	328	[REGSET_FP] = {
98a7fbf3	329	.n = 68, .size = sizeof(u32),
4d617aaa	330	.regset_get = getfpregs_get, .set = setfpregs_set,
87d80533 AV	331	},
	332	};
	333
	334	static const struct user_regset_view ptrace32_view = {
	335	.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
	336	};
	337
8e3fe806 DM	338	static const struct user_regset_view user_sparc32_view = {
	339	.name = "sparc", .e_machine = EM_SPARC,
	340	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	341	};
	342
	343	const struct user_regset_view task_user_regset_view(struct task_struct task)
	344	{
	345	return &user_sparc32_view;
	346	}
	347
a9384e23 NK	348	struct fps {
	349	unsigned long regs[32];
	350	unsigned long fsr;
	351	unsigned long flags;
	352	unsigned long extra;
	353	unsigned long fpqd;
	354	struct fq {
	355	unsigned long *insnaddr;
	356	unsigned long insn;
	357	} fpq[16];
	358	};
	359
9b05a69e NK	360	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	361	unsigned long addr, unsigned long data)
1da177e4	362	{
9775369e	363	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	364	void __user *addr2p;
a9384e23 NK	365	struct pt_regs __user *pregs;
a9384e23 NK	366	struct fps __user *fps;
d256eb8d DM	367	int ret;
d256eb8d DM	368
a9384e23 NK	369	addr2p = (void __user *) addr2;
	370	pregs = (struct pt_regs __user *) addr;
	371	fps = (struct fps __user *) addr;
1da177e4 LT	372
1da177e4 LT	373	switch(request) {
1da177e4	374	case PTRACE_GETREGS: {
87d80533 AV	375	ret = copy_regset_to_user(child, &ptrace32_view,
	376	REGSET_GENERAL, 0,
	377	19 * sizeof(u32),
	378	pregs);
9775369e	379	break;
1da177e4 LT	380	}
	381
	382	case PTRACE_SETREGS: {
98a7fbf3 AV	383	ret = copy_regset_from_user(child, &ptrace32_view,
	384	REGSET_GENERAL, 0,
	385	19 * sizeof(u32),
	386	pregs);
9775369e	387	break;
1da177e4 LT	388	}
	389
	390	case PTRACE_GETFPREGS: {
87d80533 AV	391	ret = copy_regset_to_user(child, &ptrace32_view,
	392	REGSET_FP, 0,
	393	68 * sizeof(u32),
	394	fps);
9775369e	395	break;
1da177e4 LT	396	}
	397
	398	case PTRACE_SETFPREGS: {
98a7fbf3 AV	399	ret = copy_regset_from_user(child, &ptrace32_view,
	400	REGSET_FP, 0,
	401	33 * sizeof(u32),
	402	fps);
9775369e	403	break;
1da177e4 LT	404	}
	405
	406	case PTRACE_READTEXT:
9775369e	407	case PTRACE_READDATA:
a9384e23	408	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	409
	410	if (ret == data)
	411	ret = 0;
	412	else if (ret >= 0)
	413	ret = -EIO;
	414	break;
1da177e4 LT	415
1da177e4 LT	416	case PTRACE_WRITETEXT:
9775369e	417	case PTRACE_WRITEDATA:
a9384e23	418	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	419
	420	if (ret == data)
	421	ret = 0;
	422	else if (ret >= 0)
	423	ret = -EIO;
	424	break;
1da177e4	425
9775369e	426	default:
986bef85 DM	427	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	428	request = PTRACE_DETACH;
9775369e DM	429	ret = ptrace_request(child, request, addr, data);
9775369e DM	430	break;
1da177e4 LT	431	}
1da177e4 LT	432
9775369e	433	return ret;
1da177e4 LT	434	}
1da177e4 LT	435
1c133b4b	436	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	437	{
1c133b4b DM	438	int ret = 0;
	439
	440	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	441	if (syscall_exit_p)
153474ba	442	ptrace_report_syscall_exit(regs, 0);
1c133b4b	443	else
153474ba	444	ret = ptrace_report_syscall_entry(regs);
1da177e4	445	}
1c133b4b DM	446
1c133b4b DM	447	return ret;
1da177e4	448	}