[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sh / kernel / ptrace_32.c

/*
 * SuperH process tracing
 *
 * Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
 * Copyright (C) 2002 - 2008  Paul Mundt
 *
 * Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/slab.h>
#include <linux/security.h>
#include <linux/signal.h>
#include <linux/io.h>
#include <linux/audit.h>
#include <linux/seccomp.h>
#include <linux/tracehook.h>
#include <linux/elf.h>
#include <linux/regset.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/syscalls.h>
#include <asm/fpu.h>

/*
 * This routine will get a word off of the process kernel stack.
 */
static inline int get_stack_long(struct task_struct *task, int offset)
{
	unsigned char *stack;

	stack = (unsigned char *)task_pt_regs(task);
	stack += offset;
	return (*((int *)stack));
}

/*
 * This routine will put a word on the process kernel stack.
 */
static inline int put_stack_long(struct task_struct *task, int offset,
				 unsigned long data)
{
	unsigned char *stack;

	stack = (unsigned char *)task_pt_regs(task);
	stack += offset;
	*(unsigned long *) stack = data;
	return 0;
}

void user_enable_single_step(struct task_struct *child)
{
	/* Next scheduling will set up UBC */
	if (child->thread.ubc_pc == 0)
		ubc_usercnt += 1;

	child->thread.ubc_pc = get_stack_long(child,
				offsetof(struct pt_regs, pc));

	set_tsk_thread_flag(child, TIF_SINGLESTEP);
}

void user_disable_single_step(struct task_struct *child)
{
	clear_tsk_thread_flag(child, TIF_SINGLESTEP);

	/*
	 * Ensure the UBC is not programmed at the next context switch.
	 *
	 * Normally this is not needed but there are sequences such as
	 * singlestep, signal delivery, and continue that leave the
	 * ubc_pc non-zero leading to spurious SIGTRAPs.
	 */
	if (child->thread.ubc_pc != 0) {
		ubc_usercnt -= 1;
		child->thread.ubc_pc = 0;
	}
}

/*
 * Called by kernel/ptrace.c when detaching..
 *
 * Make sure single step bits etc are not set.
 */
void ptrace_disable(struct task_struct *child)
{
	user_disable_single_step(child);
}

static int genregs_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 = task_pt_regs(target);
	int ret;

	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  regs->regs,
				  0, 16 * sizeof(unsigned long));
	if (!ret)
		/* PC, PR, SR, GBR, MACH, MACL, TRA */
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
					  &regs->pc,
					  offsetof(struct pt_regs, pc),
					  sizeof(struct pt_regs));
	if (!ret)
		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					       sizeof(struct pt_regs), -1);

	return ret;
}

static int genregs_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 = task_pt_regs(target);
	int ret;

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 regs->regs,
				 0, 16 * sizeof(unsigned long));
	if (!ret && count > 0)
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
					 &regs->pc,
					 offsetof(struct pt_regs, pc),
					 sizeof(struct pt_regs));
	if (!ret)
		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
						sizeof(struct pt_regs), -1);

	return ret;
}

#ifdef CONFIG_SH_FPU
int fpregs_get(struct task_struct *target,
	       const struct user_regset *regset,
	       unsigned int pos, unsigned int count,
	       void *kbuf, void __user *ubuf)
{
	int ret;

	ret = init_fpu(target);
	if (ret)
		return ret;

	if ((boot_cpu_data.flags & CPU_HAS_FPU))
		return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
					   &target->thread.fpu.hard, 0, -1);

	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				   &target->thread.fpu.soft, 0, -1);
}

static int fpregs_set(struct task_struct *target,
		       const struct user_regset *regset,
		       unsigned int pos, unsigned int count,
		       const void *kbuf, const void __user *ubuf)
{
	int ret;

	ret = init_fpu(target);
	if (ret)
		return ret;

	set_stopped_child_used_math(target);

	if ((boot_cpu_data.flags & CPU_HAS_FPU))
		return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
					  &target->thread.fpu.hard, 0, -1);

	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				  &target->thread.fpu.soft, 0, -1);
}

static int fpregs_active(struct task_struct *target,
			 const struct user_regset *regset)
{
	return tsk_used_math(target) ? regset->n : 0;
}
#endif

#ifdef CONFIG_SH_DSP
static int dspregs_get(struct task_struct *target,
		       const struct user_regset *regset,
		       unsigned int pos, unsigned int count,
		       void *kbuf, void __user *ubuf)
{
	const struct pt_dspregs *regs = task_pt_dspregs(target);
	int ret;

	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
				  0, sizeof(struct pt_dspregs));
	if (!ret)
		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					       sizeof(struct pt_dspregs), -1);

	return ret;
}

static int dspregs_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_dspregs *regs = task_pt_dspregs(target);
	int ret;

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
				 0, sizeof(struct pt_dspregs));
	if (!ret)
		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
						sizeof(struct pt_dspregs), -1);

	return ret;
}

static int dspregs_active(struct task_struct *target,
			  const struct user_regset *regset)
{
	struct pt_regs *regs = task_pt_regs(target);

	return regs->sr & SR_DSP ? regset->n : 0;
}
#endif

/*
 * These are our native regset flavours.
 */
enum sh_regset {
	REGSET_GENERAL,
#ifdef CONFIG_SH_FPU
	REGSET_FPU,
#endif
#ifdef CONFIG_SH_DSP
	REGSET_DSP,
#endif
};

static const struct user_regset sh_regsets[] = {
	/*
	 * Format is:
	 *	R0 --> R15
	 *	PC, PR, SR, GBR, MACH, MACL, TRA
	 */
	[REGSET_GENERAL] = {
		.core_note_type	= NT_PRSTATUS,
		.n		= ELF_NGREG,
		.size		= sizeof(long),
		.align		= sizeof(long),
		.get		= genregs_get,
		.set		= genregs_set,
	},

#ifdef CONFIG_SH_FPU
	[REGSET_FPU] = {
		.core_note_type	= NT_PRFPREG,
		.n		= sizeof(struct user_fpu_struct) / sizeof(long),
		.size		= sizeof(long),
		.align		= sizeof(long),
		.get		= fpregs_get,
		.set		= fpregs_set,
		.active		= fpregs_active,
	},
#endif

#ifdef CONFIG_SH_DSP
	[REGSET_DSP] = {
		.n		= sizeof(struct pt_dspregs) / sizeof(long),
		.size		= sizeof(long),
		.align		= sizeof(long),
		.get		= dspregs_get,
		.set		= dspregs_set,
		.active		= dspregs_active,
	},
#endif
};

static const struct user_regset_view user_sh_native_view = {
	.name		= "sh",
	.e_machine	= EM_SH,
	.regsets	= sh_regsets,
	.n		= ARRAY_SIZE(sh_regsets),
};

const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
	return &user_sh_native_view;
}

long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
	struct user * dummy = NULL;
	unsigned long __user *datap = (unsigned long __user *)data;
	int ret;

	switch (request) {
	/* read the word at location addr in the USER area. */
	case PTRACE_PEEKUSR: {
		unsigned long tmp;

		ret = -EIO;
		if ((addr & 3) || addr < 0 ||
		    addr > sizeof(struct user) - 3)
			break;

		if (addr < sizeof(struct pt_regs))
			tmp = get_stack_long(child, addr);
		else if (addr >= (long) &dummy->fpu &&
			 addr < (long) &dummy->u_fpvalid) {
			if (!tsk_used_math(child)) {
				if (addr == (long)&dummy->fpu.fpscr)
					tmp = FPSCR_INIT;
				else
					tmp = 0;
			} else
				tmp = ((long *)&child->thread.fpu)
					[(addr - (long)&dummy->fpu) >> 2];
		} else if (addr == (long) &dummy->u_fpvalid)
			tmp = !!tsk_used_math(child);
		else
			tmp = 0;
		ret = put_user(tmp, datap);
		break;
	}

	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
		ret = -EIO;
		if ((addr & 3) || addr < 0 ||
		    addr > sizeof(struct user) - 3)
			break;

		if (addr < sizeof(struct pt_regs))
			ret = put_stack_long(child, addr, data);
		else if (addr >= (long) &dummy->fpu &&
			 addr < (long) &dummy->u_fpvalid) {
			set_stopped_child_used_math(child);
			((long *)&child->thread.fpu)
				[(addr - (long)&dummy->fpu) >> 2] = data;
			ret = 0;
		} else if (addr == (long) &dummy->u_fpvalid) {
			conditional_stopped_child_used_math(data, child);
			ret = 0;
		}
		break;

	case PTRACE_GETREGS:
		return copy_regset_to_user(child, &user_sh_native_view,
					   REGSET_GENERAL,
					   0, sizeof(struct pt_regs),
					   (void __user *)data);
	case PTRACE_SETREGS:
		return copy_regset_from_user(child, &user_sh_native_view,
					     REGSET_GENERAL,
					     0, sizeof(struct pt_regs),
					     (const void __user *)data);
#ifdef CONFIG_SH_FPU
	case PTRACE_GETFPREGS:
		return copy_regset_to_user(child, &user_sh_native_view,
					   REGSET_FPU,
					   0, sizeof(struct user_fpu_struct),
					   (void __user *)data);
	case PTRACE_SETFPREGS:
		return copy_regset_from_user(child, &user_sh_native_view,
					     REGSET_FPU,
					     0, sizeof(struct user_fpu_struct),
					     (const void __user *)data);
#endif
#ifdef CONFIG_SH_DSP
	case PTRACE_GETDSPREGS:
		return copy_regset_to_user(child, &user_sh_native_view,
					   REGSET_DSP,
					   0, sizeof(struct pt_dspregs),
					   (void __user *)data);
	case PTRACE_SETDSPREGS:
		return copy_regset_from_user(child, &user_sh_native_view,
					     REGSET_DSP,
					     0, sizeof(struct pt_dspregs),
					     (const void __user *)data);
#endif
#ifdef CONFIG_BINFMT_ELF_FDPIC
	case PTRACE_GETFDPIC: {
		unsigned long tmp = 0;

		switch (addr) {
		case PTRACE_GETFDPIC_EXEC:
			tmp = child->mm->context.exec_fdpic_loadmap;
			break;
		case PTRACE_GETFDPIC_INTERP:
			tmp = child->mm->context.interp_fdpic_loadmap;
			break;
		default:
			break;
		}

		ret = 0;
		if (put_user(tmp, datap)) {
			ret = -EFAULT;
			break;
		}
		break;
	}
#endif
	default:
		ret = ptrace_request(child, request, addr, data);
		break;
	}

	return ret;
}

static inline int audit_arch(void)
{
	int arch = EM_SH;

#ifdef CONFIG_CPU_LITTLE_ENDIAN
	arch |= __AUDIT_ARCH_LE;
#endif

	return arch;
}

asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
	long ret = 0;

	secure_computing(regs->regs[0]);

	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
	    tracehook_report_syscall_entry(regs))
		/*
		 * Tracing decided this syscall should not happen.
		 * We'll return a bogus call number to get an ENOSYS
		 * error, but leave the original number in regs->regs[0].
		 */
		ret = -1L;

	if (unlikely(current->audit_context))
		audit_syscall_entry(audit_arch(), regs->regs[3],
				    regs->regs[4], regs->regs[5],
				    regs->regs[6], regs->regs[7]);

	return ret ?: regs->regs[0];
}

asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
{
	int step;

	if (unlikely(current->audit_context))
		audit_syscall_exit(AUDITSC_RESULT(regs->regs[0]),
				   regs->regs[0]);

	step = test_thread_flag(TIF_SINGLESTEP);
	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
		tracehook_report_syscall_exit(regs, step);
}
Commit	Line	Data
1da177e4	1	/*
934135c1	2	* SuperH process tracing
1da177e4	3	*
934135c1 PM	4	* Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
934135c1 PM	5	* Copyright (C) 2002 - 2008 Paul Mundt
1da177e4	6	*
934135c1 PM	7	* Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
	8	*
	9	* This file is subject to the terms and conditions of the GNU General Public
	10	* License. See the file "COPYING" in the main directory of this archive
	11	* for more details.
1da177e4	12	*/
1da177e4 LT	13	#include <linux/kernel.h>
	14	#include <linux/sched.h>
	15	#include <linux/mm.h>
	16	#include <linux/smp.h>
1da177e4 LT	17	#include <linux/errno.h>
	18	#include <linux/ptrace.h>
	19	#include <linux/user.h>
	20	#include <linux/slab.h>
	21	#include <linux/security.h>
7ed20e1a	22	#include <linux/signal.h>
9432f968	23	#include <linux/io.h>
1322b9de	24	#include <linux/audit.h>
c4637d47	25	#include <linux/seccomp.h>
ab99c733	26	#include <linux/tracehook.h>
934135c1 PM	27	#include <linux/elf.h>
934135c1 PM	28	#include <linux/regset.h>
1da177e4 LT	29	#include <asm/uaccess.h>
	30	#include <asm/pgtable.h>
	31	#include <asm/system.h>
	32	#include <asm/processor.h>
	33	#include <asm/mmu_context.h>
fa43972f	34	#include <asm/syscalls.h>
e7ab3cd2	35	#include <asm/fpu.h>
1da177e4	36
1da177e4 LT	37	/*
	38	* This routine will get a word off of the process kernel stack.
	39	*/
	40	static inline int get_stack_long(struct task_struct *task, int offset)
	41	{
	42	unsigned char *stack;
	43
3cf0f4ec	44	stack = (unsigned char *)task_pt_regs(task);
1da177e4 LT	45	stack += offset;
	46	return (((int )stack));
	47	}
	48
	49	/*
	50	* This routine will put a word on the process kernel stack.
	51	*/
	52	static inline int put_stack_long(struct task_struct *task, int offset,
	53	unsigned long data)
	54	{
	55	unsigned char *stack;
	56
3cf0f4ec	57	stack = (unsigned char *)task_pt_regs(task);
1da177e4 LT	58	stack += offset;
	59	(unsigned long ) stack = data;
	60	return 0;
	61	}
	62
c459dbf2 PM	63	void user_enable_single_step(struct task_struct *child)
c459dbf2 PM	64	{
c459dbf2 PM	65	/* Next scheduling will set up UBC */
	66	if (child->thread.ubc_pc == 0)
	67	ubc_usercnt += 1;
	68
934135c1 PM	69	child->thread.ubc_pc = get_stack_long(child,
934135c1 PM	70	offsetof(struct pt_regs, pc));
c459dbf2 PM	71
	72	set_tsk_thread_flag(child, TIF_SINGLESTEP);
	73	}
	74
	75	void user_disable_single_step(struct task_struct *child)
9432f968 SM	76	{
	77	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
	78
	79	/*
	80	* Ensure the UBC is not programmed at the next context switch.
	81	*
	82	* Normally this is not needed but there are sequences such as
	83	* singlestep, signal delivery, and continue that leave the
	84	* ubc_pc non-zero leading to spurious SIGTRAPs.
	85	*/
	86	if (child->thread.ubc_pc != 0) {
	87	ubc_usercnt -= 1;
	88	child->thread.ubc_pc = 0;
	89	}
	90	}
	91
1da177e4 LT	92	/*
	93	* Called by kernel/ptrace.c when detaching..
	94	*
	95	* Make sure single step bits etc are not set.
	96	*/
	97	void ptrace_disable(struct task_struct *child)
	98	{
c459dbf2	99	user_disable_single_step(child);
1da177e4 LT	100	}
1da177e4 LT	101
934135c1 PM	102	static int genregs_get(struct task_struct *target,
	103	const struct user_regset *regset,
	104	unsigned int pos, unsigned int count,
	105	void kbuf, void __user ubuf)
	106	{
	107	const struct pt_regs *regs = task_pt_regs(target);
	108	int ret;
	109
	110	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	111	regs->regs,
	112	0, 16 * sizeof(unsigned long));
	113	if (!ret)
	114	/* PC, PR, SR, GBR, MACH, MACL, TRA */
	115	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	116	&regs->pc,
	117	offsetof(struct pt_regs, pc),
	118	sizeof(struct pt_regs));
	119	if (!ret)
	120	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	121	sizeof(struct pt_regs), -1);
	122
	123	return ret;
	124	}
	125
	126	static int genregs_set(struct task_struct *target,
	127	const struct user_regset *regset,
	128	unsigned int pos, unsigned int count,
	129	const void kbuf, const void __user ubuf)
	130	{
	131	struct pt_regs *regs = task_pt_regs(target);
	132	int ret;
	133
	134	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	135	regs->regs,
	136	0, 16 * sizeof(unsigned long));
	137	if (!ret && count > 0)
	138	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	139	&regs->pc,
	140	offsetof(struct pt_regs, pc),
	141	sizeof(struct pt_regs));
	142	if (!ret)
	143	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	144	sizeof(struct pt_regs), -1);
	145
	146	return ret;
	147	}
	148
e7ab3cd2 PM	149	#ifdef CONFIG_SH_FPU
	150	int fpregs_get(struct task_struct *target,
	151	const struct user_regset *regset,
	152	unsigned int pos, unsigned int count,
	153	void kbuf, void __user ubuf)
	154	{
	155	int ret;
	156
	157	ret = init_fpu(target);
	158	if (ret)
	159	return ret;
	160
	161	if ((boot_cpu_data.flags & CPU_HAS_FPU))
	162	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	163	&target->thread.fpu.hard, 0, -1);
	164
	165	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	166	&target->thread.fpu.soft, 0, -1);
	167	}
	168
	169	static int fpregs_set(struct task_struct *target,
	170	const struct user_regset *regset,
	171	unsigned int pos, unsigned int count,
	172	const void kbuf, const void __user ubuf)
	173	{
	174	int ret;
	175
	176	ret = init_fpu(target);
	177	if (ret)
	178	return ret;
	179
	180	set_stopped_child_used_math(target);
	181
	182	if ((boot_cpu_data.flags & CPU_HAS_FPU))
	183	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	184	&target->thread.fpu.hard, 0, -1);
	185
	186	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	187	&target->thread.fpu.soft, 0, -1);
	188	}
	189
	190	static int fpregs_active(struct task_struct *target,
	191	const struct user_regset *regset)
	192	{
	193	return tsk_used_math(target) ? regset->n : 0;
	194	}
	195	#endif
	196
5dadb343 PM	197	#ifdef CONFIG_SH_DSP
	198	static int dspregs_get(struct task_struct *target,
	199	const struct user_regset *regset,
	200	unsigned int pos, unsigned int count,
	201	void kbuf, void __user ubuf)
	202	{
	203	const struct pt_dspregs *regs = task_pt_dspregs(target);
	204	int ret;
	205
	206	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
	207	0, sizeof(struct pt_dspregs));
	208	if (!ret)
	209	ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	210	sizeof(struct pt_dspregs), -1);
	211
	212	return ret;
	213	}
	214
	215	static int dspregs_set(struct task_struct *target,
	216	const struct user_regset *regset,
	217	unsigned int pos, unsigned int count,
	218	const void kbuf, const void __user ubuf)
	219	{
	220	struct pt_dspregs *regs = task_pt_dspregs(target);
	221	int ret;
	222
	223	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
	224	0, sizeof(struct pt_dspregs));
	225	if (!ret)
	226	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	227	sizeof(struct pt_dspregs), -1);
	228
	229	return ret;
	230	}
72461997 PM	231
	232	static int dspregs_active(struct task_struct *target,
	233	const struct user_regset *regset)
	234	{
	235	struct pt_regs *regs = task_pt_regs(target);
	236
	237	return regs->sr & SR_DSP ? regset->n : 0;
	238	}
5dadb343 PM	239	#endif
5dadb343 PM	240
934135c1 PM	241	/*
	242	* These are our native regset flavours.
	243	*/
	244	enum sh_regset {
	245	REGSET_GENERAL,
e7ab3cd2 PM	246	#ifdef CONFIG_SH_FPU
	247	REGSET_FPU,
	248	#endif
5dadb343 PM	249	#ifdef CONFIG_SH_DSP
	250	REGSET_DSP,
	251	#endif
934135c1 PM	252	};
	253
	254	static const struct user_regset sh_regsets[] = {
	255	/*
	256	* Format is:
	257	* R0 --> R15
	258	* PC, PR, SR, GBR, MACH, MACL, TRA
	259	*/
	260	[REGSET_GENERAL] = {
	261	.core_note_type = NT_PRSTATUS,
	262	.n = ELF_NGREG,
	263	.size = sizeof(long),
	264	.align = sizeof(long),
	265	.get = genregs_get,
	266	.set = genregs_set,
	267	},
5dadb343	268
e7ab3cd2 PM	269	#ifdef CONFIG_SH_FPU
	270	[REGSET_FPU] = {
	271	.core_note_type = NT_PRFPREG,
	272	.n = sizeof(struct user_fpu_struct) / sizeof(long),
	273	.size = sizeof(long),
	274	.align = sizeof(long),
	275	.get = fpregs_get,
	276	.set = fpregs_set,
	277	.active = fpregs_active,
	278	},
	279	#endif
	280
5dadb343 PM	281	#ifdef CONFIG_SH_DSP
	282	[REGSET_DSP] = {
	283	.n = sizeof(struct pt_dspregs) / sizeof(long),
	284	.size = sizeof(long),
	285	.align = sizeof(long),
	286	.get = dspregs_get,
	287	.set = dspregs_set,
72461997	288	.active = dspregs_active,
5dadb343 PM	289	},
5dadb343 PM	290	#endif
934135c1 PM	291	};
	292
	293	static const struct user_regset_view user_sh_native_view = {
	294	.name = "sh",
	295	.e_machine = EM_SH,
	296	.regsets = sh_regsets,
	297	.n = ARRAY_SIZE(sh_regsets),
	298	};
	299
f9540ece PM	300	const struct user_regset_view task_user_regset_view(struct task_struct task)
	301	{
	302	return &user_sh_native_view;
	303	}
	304
481bed45	305	long arch_ptrace(struct task_struct *child, long request, long addr, long data)
1da177e4	306	{
1da177e4	307	struct user * dummy = NULL;
fa43972f	308	unsigned long __user datap = (unsigned long __user )data;
1da177e4 LT	309	int ret;
1da177e4 LT	310
1da177e4	311	switch (request) {
1da177e4 LT	312	/* read the word at location addr in the USER area. */
	313	case PTRACE_PEEKUSR: {
	314	unsigned long tmp;
	315
	316	ret = -EIO;
9432f968	317	if ((addr & 3) \|\| addr < 0 \|\|
1da177e4 LT	318	addr > sizeof(struct user) - 3)
	319	break;
	320
	321	if (addr < sizeof(struct pt_regs))
	322	tmp = get_stack_long(child, addr);
	323	else if (addr >= (long) &dummy->fpu &&
	324	addr < (long) &dummy->u_fpvalid) {
	325	if (!tsk_used_math(child)) {
	326	if (addr == (long)&dummy->fpu.fpscr)
	327	tmp = FPSCR_INIT;
	328	else
	329	tmp = 0;
	330	} else
	331	tmp = ((long *)&child->thread.fpu)
	332	[(addr - (long)&dummy->fpu) >> 2];
	333	} else if (addr == (long) &dummy->u_fpvalid)
	334	tmp = !!tsk_used_math(child);
	335	else
	336	tmp = 0;
fa43972f	337	ret = put_user(tmp, datap);
1da177e4 LT	338	break;
	339	}
	340
1da177e4 LT	341	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
1da177e4 LT	342	ret = -EIO;
9432f968	343	if ((addr & 3) \|\| addr < 0 \|\|
1da177e4 LT	344	addr > sizeof(struct user) - 3)
	345	break;
	346
	347	if (addr < sizeof(struct pt_regs))
	348	ret = put_stack_long(child, addr, data);
	349	else if (addr >= (long) &dummy->fpu &&
	350	addr < (long) &dummy->u_fpvalid) {
	351	set_stopped_child_used_math(child);
	352	((long *)&child->thread.fpu)
	353	[(addr - (long)&dummy->fpu) >> 2] = data;
	354	ret = 0;
	355	} else if (addr == (long) &dummy->u_fpvalid) {
	356	conditional_stopped_child_used_math(data, child);
	357	ret = 0;
	358	}
	359	break;
	360
934135c1 PM	361	case PTRACE_GETREGS:
	362	return copy_regset_to_user(child, &user_sh_native_view,
	363	REGSET_GENERAL,
	364	0, sizeof(struct pt_regs),
	365	(void __user *)data);
	366	case PTRACE_SETREGS:
	367	return copy_regset_from_user(child, &user_sh_native_view,
	368	REGSET_GENERAL,
	369	0, sizeof(struct pt_regs),
	370	(const void __user *)data);
e7ab3cd2 PM	371	#ifdef CONFIG_SH_FPU
	372	case PTRACE_GETFPREGS:
	373	return copy_regset_to_user(child, &user_sh_native_view,
	374	REGSET_FPU,
	375	0, sizeof(struct user_fpu_struct),
	376	(void __user *)data);
	377	case PTRACE_SETFPREGS:
	378	return copy_regset_from_user(child, &user_sh_native_view,
	379	REGSET_FPU,
	380	0, sizeof(struct user_fpu_struct),
	381	(const void __user *)data);
	382	#endif
1da177e4	383	#ifdef CONFIG_SH_DSP
5dadb343 PM	384	case PTRACE_GETDSPREGS:
	385	return copy_regset_to_user(child, &user_sh_native_view,
	386	REGSET_DSP,
	387	0, sizeof(struct pt_dspregs),
	388	(void __user *)data);
	389	case PTRACE_SETDSPREGS:
	390	return copy_regset_from_user(child, &user_sh_native_view,
	391	REGSET_DSP,
	392	0, sizeof(struct pt_dspregs),
	393	(const void __user *)data);
3bc24a1a PM	394	#endif
	395	#ifdef CONFIG_BINFMT_ELF_FDPIC
	396	case PTRACE_GETFDPIC: {
	397	unsigned long tmp = 0;
	398
	399	switch (addr) {
	400	case PTRACE_GETFDPIC_EXEC:
	401	tmp = child->mm->context.exec_fdpic_loadmap;
	402	break;
	403	case PTRACE_GETFDPIC_INTERP:
	404	tmp = child->mm->context.interp_fdpic_loadmap;
	405	break;
	406	default:
	407	break;
	408	}
	409
	410	ret = 0;
fa43972f	411	if (put_user(tmp, datap)) {
3bc24a1a PM	412	ret = -EFAULT;
	413	break;
	414	}
	415	break;
	416	}
1da177e4 LT	417	#endif
	418	default:
	419	ret = ptrace_request(child, request, addr, data);
	420	break;
	421	}
481bed45	422
1da177e4 LT	423	return ret;
	424	}
	425
9e5e2117 PM	426	static inline int audit_arch(void)
	427	{
	428	int arch = EM_SH;
	429
	430	#ifdef CONFIG_CPU_LITTLE_ENDIAN
	431	arch \|= __AUDIT_ARCH_LE;
	432	#endif
	433
	434	return arch;
	435	}
	436
ab99c733	437	asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
1da177e4	438	{
ab99c733	439	long ret = 0;
1da177e4	440
c4637d47 PM	441	secure_computing(regs->regs[0]);
c4637d47 PM	442
ab99c733 PM	443	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
	444	tracehook_report_syscall_entry(regs))
	445	/*
	446	* Tracing decided this syscall should not happen.
	447	* We'll return a bogus call number to get an ENOSYS
	448	* error, but leave the original number in regs->regs[0].
	449	*/
	450	ret = -1L;
1322b9de	451
ab99c733	452	if (unlikely(current->audit_context))
9e5e2117	453	audit_syscall_entry(audit_arch(), regs->regs[3],
1322b9de YN	454	regs->regs[4], regs->regs[5],
	455	regs->regs[6], regs->regs[7]);
	456
ab99c733 PM	457	return ret ?: regs->regs[0];
	458	}
	459
	460	asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
	461	{
	462	int step;
	463
	464	if (unlikely(current->audit_context))
	465	audit_syscall_exit(AUDITSC_RESULT(regs->regs[0]),
	466	regs->regs[0]);
	467
	468	step = test_thread_flag(TIF_SINGLESTEP);
	469	if (step \|\| test_thread_flag(TIF_SYSCALL_TRACE))
	470	tracehook_report_syscall_exit(regs, step);
1da177e4	471	}