[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/tracehook.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,
			 unsigned int pos, unsigned int count,
			 void *kbuf, void __user *ubuf)
{
	const struct pt_regs *regs = target->thread.kregs;
	u32 uregs[16];
	int ret;

	if (target == current)
		flush_user_windows();

	ret = user_regset_copyout(&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_copyout(&pos, &count, &kbuf, &ubuf,
				  uregs,
				  16 * sizeof(u32), 32 * sizeof(u32));
	if (ret)
		return ret;

	uregs[0] = regs->psr;
	uregs[1] = regs->pc;
	uregs[2] = regs->npc;
	uregs[3] = regs->y;
	uregs[4] = 0;	/* WIM */
	uregs[5] = 0;	/* TBR */
	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  uregs,
				  32 * sizeof(u32), 38 * 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,
			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)
		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 int getregs_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;
	u32 v[4];
	int ret;

	if (target == current)
		flush_user_windows();

	v[0] = regs->psr;
	v[1] = regs->pc;
	v[2] = regs->npc;
	v[3] = regs->y;
	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  v,
				  0 * sizeof(u32), 4 * sizeof(u32));
	if (ret)
		return ret;

	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  regs->u_regs + 1,
				  4 * sizeof(u32), 19 * 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,
			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)
		return ret;
	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  &target->thread.fsr,
				  32 * sizeof(u32), 33 * sizeof(u32));
	if (ret)
		return ret;
	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
				  33 * sizeof(u32), 68 * 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),
		.get = getregs_get, .set = setregs_set,
	},
	[REGSET_FP] = {
		.n = 68, .size = sizeof(u32),
		.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)
			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	25
7c0f6ba6	26	#include <linux/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
cf51e129 AV	48	static int regwindow32_get(struct task_struct *target,
	49	const struct pt_regs *regs,
	50	u32 *uregs)
	51	{
	52	unsigned long reg_window = regs->u_regs[UREG_I6];
	53	int size = 16 * sizeof(u32);
	54
	55	if (target == current) {
	56	if (copy_from_user(uregs, (void __user *)reg_window, size))
	57	return -EFAULT;
	58	} else {
	59	if (access_process_vm(target, reg_window, uregs, size,
	60	FOLL_FORCE) != size)
	61	return -EFAULT;
	62	}
	63	return 0;
	64	}
	65
	66	static int regwindow32_set(struct task_struct *target,
	67	const struct pt_regs *regs,
	68	u32 *uregs)
	69	{
	70	unsigned long reg_window = regs->u_regs[UREG_I6];
	71	int size = 16 * sizeof(u32);
	72
	73	if (target == current) {
	74	if (copy_to_user((void __user *)reg_window, uregs, size))
	75	return -EFAULT;
	76	} else {
	77	if (access_process_vm(target, reg_window, uregs, size,
	78	FOLL_FORCE \| FOLL_WRITE) != size)
	79	return -EFAULT;
	80	}
	81	return 0;
	82	}
	83
8e3fe806 DM	84	static int genregs32_get(struct task_struct *target,
	85	const struct user_regset *regset,
	86	unsigned int pos, unsigned int count,
	87	void kbuf, void __user ubuf)
	88	{
	89	const struct pt_regs *regs = target->thread.kregs;
cf51e129 AV	90	u32 uregs[16];
cf51e129 AV	91	int ret;
8e3fe806 DM	92
	93	if (target == current)
	94	flush_user_windows();
	95
cf51e129 AV	96	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	97	regs->u_regs,
	98	0, 16 * sizeof(u32));
	99	if (ret \|\| !count)
	100	return ret;
8e3fe806	101
87d80533 AV	102	if (regwindow32_get(target, regs, uregs))
	103	return -EFAULT;
	104	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	105	uregs,
	106	16 * sizeof(u32), 32 * sizeof(u32));
	107	if (ret)
	108	return ret;
8e3fe806	109
cf51e129 AV	110	uregs[0] = regs->psr;
	111	uregs[1] = regs->pc;
	112	uregs[2] = regs->npc;
	113	uregs[3] = regs->y;
	114	uregs[4] = 0; /* WIM */
	115	uregs[5] = 0; /* TBR */
	116	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	117	uregs,
	118	32 * sizeof(u32), 38 * sizeof(u32));
8e3fe806 DM	119	}
	120
	121	static int genregs32_set(struct task_struct *target,
	122	const struct user_regset *regset,
	123	unsigned int pos, unsigned int count,
	124	const void kbuf, const void __user ubuf)
	125	{
	126	struct pt_regs *regs = target->thread.kregs;
cf51e129 AV	127	u32 uregs[16];
	128	u32 psr;
	129	int ret;
8e3fe806 DM	130
	131	if (target == current)
	132	flush_user_windows();
	133
cf51e129 AV	134	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	135	regs->u_regs,
	136	0, 16 * sizeof(u32));
	137	if (ret \|\| !count)
	138	return ret;
8e3fe806	139
98a7fbf3 AV	140	if (regwindow32_get(target, regs, uregs))
	141	return -EFAULT;
	142	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	143	uregs,
	144	16 * sizeof(u32), 32 * sizeof(u32));
	145	if (ret)
	146	return ret;
	147	if (regwindow32_set(target, regs, uregs))
	148	return -EFAULT;
	149	if (!count)
	150	return 0;
	151
cf51e129 AV	152	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	153	&psr,
	154	32 * sizeof(u32), 33 * sizeof(u32));
	155	if (ret)
	156	return ret;
	157	regs->psr = (regs->psr & ~(PSR_ICC \| PSR_SYSCALL)) \|
	158	(psr & (PSR_ICC \| PSR_SYSCALL));
	159	if (!count)
	160	return 0;
	161	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	162	&regs->pc,
	163	33 * sizeof(u32), 34 * sizeof(u32));
	164	if (ret \|\| !count)
	165	return ret;
	166	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
9d964e1b	167	&regs->npc,
cf51e129 AV	168	34 * sizeof(u32), 35 * sizeof(u32));
	169	if (ret \|\| !count)
	170	return ret;
9d964e1b AV	171	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	172	&regs->y,
	173	35 * sizeof(u32), 36 * sizeof(u32));
	174	if (ret \|\| !count)
	175	return ret;
8e3fe806	176	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
9d964e1b	177	36 * sizeof(u32), 38 * sizeof(u32));
8e3fe806 DM	178	}
	179
	180	static int fpregs32_get(struct task_struct *target,
	181	const struct user_regset *regset,
	182	unsigned int pos, unsigned int count,
	183	void kbuf, void __user ubuf)
	184	{
	185	const unsigned long *fpregs = target->thread.float_regs;
	186	int ret = 0;
	187
	188	#if 0
	189	if (target == current)
	190	save_and_clear_fpu();
	191	#endif
	192
	193	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	194	fpregs,
	195	0, 32 * sizeof(u32));
	196
	197	if (!ret)
	198	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	199	32 * sizeof(u32),
	200	33 * sizeof(u32));
	201	if (!ret)
	202	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	203	&target->thread.fsr,
	204	33 * sizeof(u32),
	205	34 * sizeof(u32));
	206
	207	if (!ret) {
	208	unsigned long val;
	209
	210	val = (1 << 8) \| (8 << 16);
	211	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	212	&val,
	213	34 * sizeof(u32),
	214	35 * sizeof(u32));
	215	}
	216
	217	if (!ret)
	218	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	219	35 * sizeof(u32), -1);
	220
	221	return ret;
	222	}
	223
	224	static int fpregs32_set(struct task_struct *target,
	225	const struct user_regset *regset,
	226	unsigned int pos, unsigned int count,
	227	const void kbuf, const void __user ubuf)
	228	{
	229	unsigned long *fpregs = target->thread.float_regs;
	230	int ret;
	231
	232	#if 0
	233	if (target == current)
	234	save_and_clear_fpu();
	235	#endif
	236	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	237	fpregs,
	238	0, 32 * sizeof(u32));
	239	if (!ret)
	240	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	241	32 * sizeof(u32),
242	33 * sizeof(u32));
98a7fbf3	243	if (!ret)
8e3fe806 DM	244	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	245	&target->thread.fsr,
	246	33 * sizeof(u32),
	247	34 * sizeof(u32));
8e3fe806 DM	248	if (!ret)
	249	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	250	34 * sizeof(u32), -1);
	251	return ret;
	252	}
	253
	254	static const struct user_regset sparc32_regsets[] = {
	255	/* Format is:
	256	* G0 --> G7
	257	* O0 --> O7
	258	* L0 --> L7
	259	* I0 --> I7
	260	* PSR, PC, nPC, Y, WIM, TBR
	261	*/
	262	[REGSET_GENERAL] = {
	263	.core_note_type = NT_PRSTATUS,
7d4ee289	264	.n = 38,
8e3fe806 DM	265	.size = sizeof(u32), .align = sizeof(u32),
	266	.get = genregs32_get, .set = genregs32_set
	267	},
	268	/* Format is:
	269	* F0 --> F31
	270	* empty 32-bit word
	271	* FSR (32--bit word)
	272	* FPU QUEUE COUNT (8-bit char)
	273	* FPU QUEUE ENTRYSIZE (8-bit char)
	274	* FPU ENABLED (8-bit char)
	275	* empty 8-bit char
	276	* FPU QUEUE (64 32-bit ints)
	277	*/
	278	[REGSET_FP] = {
	279	.core_note_type = NT_PRFPREG,
7d4ee289	280	.n = 99,
8e3fe806 DM	281	.size = sizeof(u32), .align = sizeof(u32),
	282	.get = fpregs32_get, .set = fpregs32_set
	283	},
	284	};
	285
87d80533 AV	286	static int getregs_get(struct task_struct *target,
	287	const struct user_regset *regset,
	288	unsigned int pos, unsigned int count,
	289	void kbuf, void __user ubuf)
	290	{
	291	const struct pt_regs *regs = target->thread.kregs;
	292	u32 v[4];
	293	int ret;
	294
	295	if (target == current)
	296	flush_user_windows();
	297
	298	v[0] = regs->psr;
	299	v[1] = regs->pc;
	300	v[2] = regs->npc;
	301	v[3] = regs->y;
	302	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	303	v,
	304	0 * sizeof(u32), 4 * sizeof(u32));
	305	if (ret)
	306	return ret;
	307
	308	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	309	regs->u_regs + 1,
	310	4 * sizeof(u32), 19 * sizeof(u32));
	311	}
	312
98a7fbf3 AV	313	static int setregs_set(struct task_struct *target,
	314	const struct user_regset *regset,
	315	unsigned int pos, unsigned int count,
	316	const void kbuf, const void __user ubuf)
	317	{
	318	struct pt_regs *regs = target->thread.kregs;
	319	u32 v[4];
	320	int ret;
	321
	322	if (target == current)
	323	flush_user_windows();
	324
	325	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	326	v,
	327	0, 4 * sizeof(u32));
	328	if (ret)
	329	return ret;
	330	regs->psr = (regs->psr & ~(PSR_ICC \| PSR_SYSCALL)) \|
	331	(v[0] & (PSR_ICC \| PSR_SYSCALL));
	332	regs->pc = v[1];
	333	regs->npc = v[2];
	334	regs->y = v[3];
	335	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	336	regs->u_regs + 1,
	337	4 * sizeof(u32) , 19 * sizeof(u32));
	338	}
	339
87d80533 AV	340	static int getfpregs_get(struct task_struct *target,
	341	const struct user_regset *regset,
	342	unsigned int pos, unsigned int count,
	343	void kbuf, void __user ubuf)
	344	{
	345	const unsigned long *fpregs = target->thread.float_regs;
	346	int ret = 0;
	347
	348	#if 0
	349	if (target == current)
	350	save_and_clear_fpu();
	351	#endif
	352
	353	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	354	fpregs,
	355	0, 32 * sizeof(u32));
	356	if (ret)
	357	return ret;
	358	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	359	&target->thread.fsr,
	360	32 * sizeof(u32), 33 * sizeof(u32));
	361	if (ret)
	362	return ret;
	363	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	364	33 * sizeof(u32), 68 * sizeof(u32));
	365	}
	366
98a7fbf3 AV	367	static int setfpregs_set(struct task_struct *target,
	368	const struct user_regset *regset,
	369	unsigned int pos, unsigned int count,
	370	const void kbuf, const void __user ubuf)
	371	{
	372	unsigned long *fpregs = target->thread.float_regs;
	373	int ret;
	374
	375	#if 0
	376	if (target == current)
	377	save_and_clear_fpu();
	378	#endif
	379	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	380	fpregs,
	381	0, 32 * sizeof(u32));
	382	if (ret)
	383	return ret;
	384	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	385	&target->thread.fsr,
	386	32 * sizeof(u32),
	387	33 * sizeof(u32));
	388	}
	389
87d80533 AV	390	static const struct user_regset ptrace32_regsets[] = {
87d80533 AV	391	[REGSET_GENERAL] = {
98a7fbf3 AV	392	.n = 19, .size = sizeof(u32),
98a7fbf3 AV	393	.get = getregs_get, .set = setregs_set,
87d80533 AV	394	},
87d80533 AV	395	[REGSET_FP] = {
98a7fbf3 AV	396	.n = 68, .size = sizeof(u32),
98a7fbf3 AV	397	.get = getfpregs_get, .set = setfpregs_set,
87d80533 AV	398	},
	399	};
	400
	401	static const struct user_regset_view ptrace32_view = {
	402	.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
	403	};
	404
8e3fe806 DM	405	static const struct user_regset_view user_sparc32_view = {
	406	.name = "sparc", .e_machine = EM_SPARC,
	407	.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
	408	};
	409
	410	const struct user_regset_view task_user_regset_view(struct task_struct task)
	411	{
	412	return &user_sparc32_view;
	413	}
	414
a9384e23 NK	415	struct fps {
	416	unsigned long regs[32];
	417	unsigned long fsr;
	418	unsigned long flags;
	419	unsigned long extra;
	420	unsigned long fpqd;
	421	struct fq {
	422	unsigned long *insnaddr;
	423	unsigned long insn;
	424	} fpq[16];
	425	};
	426
9b05a69e NK	427	long arch_ptrace(struct task_struct *child, long request,
9b05a69e NK	428	unsigned long addr, unsigned long data)
1da177e4	429	{
9775369e	430	unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
a9384e23	431	void __user *addr2p;
a9384e23 NK	432	struct pt_regs __user *pregs;
a9384e23 NK	433	struct fps __user *fps;
d256eb8d DM	434	int ret;
d256eb8d DM	435
a9384e23 NK	436	addr2p = (void __user *) addr2;
	437	pregs = (struct pt_regs __user *) addr;
	438	fps = (struct fps __user *) addr;
1da177e4 LT	439
1da177e4 LT	440	switch(request) {
1da177e4	441	case PTRACE_GETREGS: {
87d80533 AV	442	ret = copy_regset_to_user(child, &ptrace32_view,
	443	REGSET_GENERAL, 0,
	444	19 * sizeof(u32),
	445	pregs);
9775369e	446	break;
1da177e4 LT	447	}
	448
	449	case PTRACE_SETREGS: {
98a7fbf3 AV	450	ret = copy_regset_from_user(child, &ptrace32_view,
	451	REGSET_GENERAL, 0,
	452	19 * sizeof(u32),
	453	pregs);
9775369e	454	break;
1da177e4 LT	455	}
	456
	457	case PTRACE_GETFPREGS: {
87d80533 AV	458	ret = copy_regset_to_user(child, &ptrace32_view,
	459	REGSET_FP, 0,
	460	68 * sizeof(u32),
	461	fps);
9775369e	462	break;
1da177e4 LT	463	}
	464
	465	case PTRACE_SETFPREGS: {
98a7fbf3 AV	466	ret = copy_regset_from_user(child, &ptrace32_view,
	467	REGSET_FP, 0,
	468	33 * sizeof(u32),
	469	fps);
9775369e	470	break;
1da177e4 LT	471	}
	472
	473	case PTRACE_READTEXT:
9775369e	474	case PTRACE_READDATA:
a9384e23	475	ret = ptrace_readdata(child, addr, addr2p, data);
9775369e DM	476
	477	if (ret == data)
	478	ret = 0;
	479	else if (ret >= 0)
	480	ret = -EIO;
	481	break;
1da177e4 LT	482
1da177e4 LT	483	case PTRACE_WRITETEXT:
9775369e	484	case PTRACE_WRITEDATA:
a9384e23	485	ret = ptrace_writedata(child, addr2p, addr, data);
9775369e DM	486
	487	if (ret == data)
	488	ret = 0;
	489	else if (ret >= 0)
	490	ret = -EIO;
	491	break;
1da177e4	492
9775369e	493	default:
986bef85 DM	494	if (request == PTRACE_SPARC_DETACH)
986bef85 DM	495	request = PTRACE_DETACH;
9775369e DM	496	ret = ptrace_request(child, request, addr, data);
9775369e DM	497	break;
1da177e4 LT	498	}
1da177e4 LT	499
9775369e	500	return ret;
1da177e4 LT	501	}
1da177e4 LT	502
1c133b4b	503	asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4	504	{
1c133b4b DM	505	int ret = 0;
	506
	507	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
	508	if (syscall_exit_p)
	509	tracehook_report_syscall_exit(regs, 0);
	510	else
	511	ret = tracehook_report_syscall_entry(regs);
1da177e4	512	}
1c133b4b DM	513
1c133b4b DM	514	return ret;
1da177e4	515	}