[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;
	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
					 36 * sizeof(u32), 38 * sizeof(u32));
}

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)
		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;
8e3fe806	161	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
9d964e1b	162	36 * sizeof(u32), 38 * sizeof(u32));
8e3fe806 DM	163	}
	164
	165	static int fpregs32_get(struct task_struct *target,
	166	const struct user_regset *regset,
4d617aaa	167	struct membuf to)
8e3fe806	168	{
8e3fe806 DM	169	#if 0
	170	if (target == current)
	171	save_and_clear_fpu();
	172	#endif
	173
4d617aaa AV	174	membuf_write(&to, target->thread.float_regs, 32 * sizeof(u32));
	175	membuf_zero(&to, sizeof(u32));
	176	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	177	membuf_store(&to, (u32)((1 << 8) \| (8 << 16)));
	178	return membuf_zero(&to, 64 * sizeof(u32));
8e3fe806 DM	179	}
	180
	181	static int fpregs32_set(struct task_struct *target,
	182	const struct user_regset *regset,
	183	unsigned int pos, unsigned int count,
	184	const void kbuf, const void __user ubuf)
	185	{
	186	unsigned long *fpregs = target->thread.float_regs;
	187	int ret;
	188
	189	#if 0
	190	if (target == current)
	191	save_and_clear_fpu();
	192	#endif
	193	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	194	fpregs,
	195	0, 32 * sizeof(u32));
	196	if (!ret)
	197	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	198	32 * sizeof(u32),
	199	33 * sizeof(u32));
98a7fbf3	200	if (!ret)
8e3fe806 DM	201	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	202	&target->thread.fsr,
	203	33 * sizeof(u32),
	204	34 * sizeof(u32));
8e3fe806 DM	205	if (!ret)
	206	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	207	34 * sizeof(u32), -1);
	208	return ret;
	209	}
	210
	211	static const struct user_regset sparc32_regsets[] = {
	212	/* Format is:
	213	* G0 --> G7
	214	* O0 --> O7
	215	* L0 --> L7
	216	* I0 --> I7
	217	* PSR, PC, nPC, Y, WIM, TBR
	218	*/
	219	[REGSET_GENERAL] = {
	220	.core_note_type = NT_PRSTATUS,
7d4ee289	221	.n = 38,
8e3fe806	222	.size = sizeof(u32), .align = sizeof(u32),
4d617aaa	223	.regset_get = genregs32_get, .set = genregs32_set
8e3fe806 DM	224	},
	225	/* Format is:
	226	* F0 --> F31
	227	* empty 32-bit word
	228	* FSR (32--bit word)
	229	* FPU QUEUE COUNT (8-bit char)
	230	* FPU QUEUE ENTRYSIZE (8-bit char)
	231	* FPU ENABLED (8-bit char)
	232	* empty 8-bit char
	233	* FPU QUEUE (64 32-bit ints)
	234	*/
	235	[REGSET_FP] = {
	236	.core_note_type = NT_PRFPREG,
7d4ee289	237	.n = 99,
8e3fe806	238	.size = sizeof(u32), .align = sizeof(u32),
4d617aaa	239	.regset_get = fpregs32_get, .set = fpregs32_set
8e3fe806 DM	240	},
	241	};
	242
87d80533 AV	243	static int getregs_get(struct task_struct *target,
87d80533 AV	244	const struct user_regset *regset,
4d617aaa	245	struct membuf to)
87d80533 AV	246	{
87d80533 AV	247	const struct pt_regs *regs = target->thread.kregs;
87d80533 AV	248
	249	if (target == current)
	250	flush_user_windows();
	251
4d617aaa AV	252	membuf_store(&to, regs->psr);
	253	membuf_store(&to, regs->pc);
	254	membuf_store(&to, regs->npc);
	255	membuf_store(&to, regs->y);
	256	return membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u32));
87d80533 AV	257	}
87d80533 AV	258
98a7fbf3 AV	259	static int setregs_set(struct task_struct *target,
	260	const struct user_regset *regset,
	261	unsigned int pos, unsigned int count,
	262	const void kbuf, const void __user ubuf)
	263	{
	264	struct pt_regs *regs = target->thread.kregs;
	265	u32 v[4];
	266	int ret;
	267
	268	if (target == current)
	269	flush_user_windows();
	270
	271	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	272	v,
	273	0, 4 * sizeof(u32));
	274	if (ret)
	275	return ret;
	276	regs->psr = (regs->psr & ~(PSR_ICC \| PSR_SYSCALL)) \|
	277	(v[0] & (PSR_ICC \| PSR_SYSCALL));
	278	regs->pc = v[1];
	279	regs->npc = v[2];
	280	regs->y = v[3];
	281	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	282	regs->u_regs + 1,
	283	4 * sizeof(u32) , 19 * sizeof(u32));
	284	}
	285
87d80533 AV	286	static int getfpregs_get(struct task_struct *target,
87d80533 AV	287	const struct user_regset *regset,
4d617aaa	288	struct membuf to)
87d80533	289	{
87d80533 AV	290	#if 0
	291	if (target == current)
	292	save_and_clear_fpu();
	293	#endif
4d617aaa AV	294	membuf_write(&to, &target->thread.float_regs, 32 * sizeof(u32));
	295	membuf_write(&to, &target->thread.fsr, sizeof(u32));
	296	return membuf_zero(&to, 35 * sizeof(u32));
87d80533 AV	297	}
87d80533 AV	298
98a7fbf3 AV	299	static int setfpregs_set(struct task_struct *target,
	300	const struct user_regset *regset,
	301	unsigned int pos, unsigned int count,
	302	const void kbuf, const void __user ubuf)
	303	{
	304	unsigned long *fpregs = target->thread.float_regs;
	305	int ret;
	306
	307	#if 0
	308	if (target == current)
	309	save_and_clear_fpu();
	310	#endif
	311	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	312	fpregs,
	313	0, 32 * sizeof(u32));
	314	if (ret)
	315	return ret;
	316	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	317	&target->thread.fsr,
	318	32 * sizeof(u32),
	319	33 * sizeof(u32));
	320	}
	321
87d80533 AV	322	static const struct user_regset ptrace32_regsets[] = {
87d80533 AV	323	[REGSET_GENERAL] = {
98a7fbf3	324	.n = 19, .size = sizeof(u32),
4d617aaa	325	.regset_get = getregs_get, .set = setregs_set,
87d80533 AV	326	},
87d80533 AV	327	[REGSET_FP] = {
98a7fbf3	328	.n = 68, .size = sizeof(u32),
4d617aaa	329	.regset_get = getfpregs_get, .set = setfpregs_set,
87d80533 AV	330	},
	331	};
	332
	333	static const struct user_regset_view ptrace32_view = {
	334	.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
	335	};
	336
8e3fe806 DM	337	static const struct user_regset_view user_sparc32_view = {
	338	.name = "sparc", .e_machine = EM_SPARC,
	339	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	340	};
	341
	342	const struct user_regset_view task_user_regset_view(struct task_struct task)
	343	{
	344	return &user_sparc32_view;
	345	}
	346
a9384e23 NK	347	struct fps {
	348	unsigned long regs[32];
	349	unsigned long fsr;
	350	unsigned long flags;
	351	unsigned long extra;
	352	unsigned long fpqd;
	353	struct fq {
	354	unsigned long *insnaddr;
	355	unsigned long insn;
	356	} fpq[16];
	357	};
	358
9b05a69e NK	359	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	360	unsigned long addr, unsigned long data)
1da177e4	361	{
9775369e	362	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	363	void __user *addr2p;
a9384e23 NK	364	struct pt_regs __user *pregs;
a9384e23 NK	365	struct fps __user *fps;
d256eb8d DM	366	int ret;
d256eb8d DM	367
a9384e23 NK	368	addr2p = (void __user *) addr2;
	369	pregs = (struct pt_regs __user *) addr;
	370	fps = (struct fps __user *) addr;
1da177e4 LT	371
1da177e4 LT	372	switch(request) {
1da177e4	373	case PTRACE_GETREGS: {
87d80533 AV	374	ret = copy_regset_to_user(child, &ptrace32_view,
	375	REGSET_GENERAL, 0,
	376	19 * sizeof(u32),
	377	pregs);
9775369e	378	break;
1da177e4 LT	379	}
	380
	381	case PTRACE_SETREGS: {
98a7fbf3 AV	382	ret = copy_regset_from_user(child, &ptrace32_view,
	383	REGSET_GENERAL, 0,
	384	19 * sizeof(u32),
	385	pregs);
9775369e	386	break;
1da177e4 LT	387	}
	388
	389	case PTRACE_GETFPREGS: {
87d80533 AV	390	ret = copy_regset_to_user(child, &ptrace32_view,
	391	REGSET_FP, 0,
	392	68 * sizeof(u32),
	393	fps);
9775369e	394	break;
1da177e4 LT	395	}
	396
	397	case PTRACE_SETFPREGS: {
98a7fbf3 AV	398	ret = copy_regset_from_user(child, &ptrace32_view,
	399	REGSET_FP, 0,
	400	33 * sizeof(u32),
	401	fps);
9775369e	402	break;
1da177e4 LT	403	}
	404
	405	case PTRACE_READTEXT:
9775369e	406	case PTRACE_READDATA:
a9384e23	407	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	408
	409	if (ret == data)
	410	ret = 0;
	411	else if (ret >= 0)
	412	ret = -EIO;
	413	break;
1da177e4 LT	414
1da177e4 LT	415	case PTRACE_WRITETEXT:
9775369e	416	case PTRACE_WRITEDATA:
a9384e23	417	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	418
	419	if (ret == data)
	420	ret = 0;
	421	else if (ret >= 0)
	422	ret = -EIO;
	423	break;
1da177e4	424
9775369e	425	default:
986bef85 DM	426	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	427	request = PTRACE_DETACH;
9775369e DM	428	ret = ptrace_request(child, request, addr, data);
9775369e DM	429	break;
1da177e4 LT	430	}
1da177e4 LT	431
9775369e	432	return ret;
1da177e4 LT	433	}
1da177e4 LT	434
1c133b4b	435	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	436	{
1c133b4b DM	437	int ret = 0;
	438
	439	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	440	if (syscall_exit_p)
153474ba	441	ptrace_report_syscall_exit(regs, 0);
1c133b4b	442	else
153474ba	443	ret = ptrace_report_syscall_entry(regs);
1da177e4	444	}
1c133b4b DM	445
1c133b4b DM	446	return ret;
1da177e4	447	}