arch/sparc/kernel/ptrace_32.c - linux - Git at Google

 /* 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>

 /* #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;
 }
	/* 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>

	/* #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;
	}