[mirror_ubuntu-bionic-kernel.git] / arch / blackfin / kernel / ptrace.c

/*
 * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
 * these modifications are Copyright 2004-2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/elf.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/regset.h>
#include <linux/signal.h>
#include <linux/tracehook.h>
#include <linux/uaccess.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/asm-offsets.h>
#include <asm/dma.h>
#include <asm/fixed_code.h>
#include <asm/cacheflush.h>
#include <asm/mem_map.h>

/*
 * does not yet catch signals sent when the child dies.
 * in exit.c or in signal.c.
 */

/*
 * Get contents of register REGNO in task TASK.
 */
static inline long
get_reg(struct task_struct *task, long regno, unsigned long __user *datap)
{
	long tmp;
	struct pt_regs *regs = task_pt_regs(task);

	if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0)
		return -EIO;

	switch (regno) {
	case PT_TEXT_ADDR:
		tmp = task->mm->start_code;
		break;
	case PT_TEXT_END_ADDR:
		tmp = task->mm->end_code;
		break;
	case PT_DATA_ADDR:
		tmp = task->mm->start_data;
		break;
	case PT_USP:
		tmp = task->thread.usp;
		break;
	default:
		if (regno < sizeof(*regs)) {
			void *reg_ptr = regs;
			tmp = *(long *)(reg_ptr + regno);
		} else
			return -EIO;
	}

	return put_user(tmp, datap);
}

/*
 * Write contents of register REGNO in task TASK.
 */
static inline int
put_reg(struct task_struct *task, long regno, unsigned long data)
{
	struct pt_regs *regs = task_pt_regs(task);

	if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0)
		return -EIO;

	switch (regno) {
	case PT_PC:
		/*********************************************************************/
		/* At this point the kernel is most likely in exception.             */
		/* The RETX register will be used to populate the pc of the process. */
		/*********************************************************************/
		regs->retx = data;
		regs->pc = data;
		break;
	case PT_RETX:
		break;		/* regs->retx = data; break; */
	case PT_USP:
		regs->usp = data;
		task->thread.usp = data;
		break;
	case PT_SYSCFG:	/* don't let userspace screw with this */
		if ((data & ~1) != 0x6)
			pr_warning("ptrace: ignore syscfg write of %#lx\n", data);
		break;		/* regs->syscfg = data; break; */
	default:
		if (regno < sizeof(*regs)) {
			void *reg_offset = regs;
			*(long *)(reg_offset + regno) = data;
		}
		/* Ignore writes to pseudo registers */
	}

	return 0;
}

/*
 * check that an address falls within the bounds of the target process's memory mappings
 */
static inline int is_user_addr_valid(struct task_struct *child,
				     unsigned long start, unsigned long len)
{
	struct vm_area_struct *vma;
	struct sram_list_struct *sraml;

	/* overflow */
	if (start + len < start)
		return -EIO;

	vma = find_vma(child->mm, start);
	if (vma && start >= vma->vm_start && start + len <= vma->vm_end)
			return 0;

	for (sraml = child->mm->context.sram_list; sraml; sraml = sraml->next)
		if (start >= (unsigned long)sraml->addr
		    && start + len < (unsigned long)sraml->addr + sraml->length)
			return 0;

	if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)
		return 0;

	return -EIO;
}

/*
 * retrieve the contents of Blackfin userspace general registers
 */
static int genregs_get(struct task_struct *target,
		       const struct user_regset *regset,
		       unsigned int pos, unsigned int count,
		       void *kbuf, void __user *ubuf)
{
	struct pt_regs *regs = task_pt_regs(target);
	int ret;

	/* This sucks ... */
	regs->usp = target->thread.usp;

	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
				  regs, 0, sizeof(*regs));
	if (ret < 0)
		return ret;

	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
					sizeof(*regs), -1);
}

/*
 * update the contents of the Blackfin userspace general registers
 */
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;

	/* Don't let people set SYSCFG (it's at the end of pt_regs) */
	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 regs, 0, PT_SYSCFG);
	if (ret < 0)
		return ret;

	/* This sucks ... */
	target->thread.usp = regs->usp;
	/* regs->retx = regs->pc; */

	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
					PT_SYSCFG, -1);
}

/*
 * Define the register sets available on the Blackfin under Linux
 */
enum bfin_regset {
	REGSET_GENERAL,
};

static const struct user_regset bfin_regsets[] = {
	[REGSET_GENERAL] = {
		.core_note_type = NT_PRSTATUS,
		.n              = sizeof(struct pt_regs) / sizeof(long),
		.size           = sizeof(long),
		.align          = sizeof(long),
		.get            = genregs_get,
		.set            = genregs_set,
	},
};

static const struct user_regset_view user_bfin_native_view = {
	.name      = "Blackfin",
	.e_machine = EM_BLACKFIN,
	.regsets   = bfin_regsets,
	.n         = ARRAY_SIZE(bfin_regsets),
};

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

void user_enable_single_step(struct task_struct *child)
{
	struct pt_regs *regs = task_pt_regs(child);
	regs->syscfg |= SYSCFG_SSSTEP;

	set_tsk_thread_flag(child, TIF_SINGLESTEP);
}

void user_disable_single_step(struct task_struct *child)
{
	struct pt_regs *regs = task_pt_regs(child);
	regs->syscfg &= ~SYSCFG_SSSTEP;

	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
}

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

	switch (request) {
		/* when I and D space are separate, these will need to be fixed. */
	case PTRACE_PEEKDATA:
		pr_debug("ptrace: PEEKDATA\n");
		/* fall through */
	case PTRACE_PEEKTEXT:	/* read word at location addr. */
		{
			unsigned long tmp = 0;
			int copied = 0, to_copy = sizeof(tmp);

			ret = -EIO;
			pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + %i\n", addr, to_copy);
			if (is_user_addr_valid(child, addr, to_copy) < 0)
				break;
			pr_debug("ptrace: user address is valid\n");

			switch (bfin_mem_access_type(addr, to_copy)) {
			case BFIN_MEM_ACCESS_CORE:
			case BFIN_MEM_ACCESS_CORE_ONLY:
				copied = access_process_vm(child, addr, &tmp,
				                           to_copy, 0);
				if (copied)
					break;

				/* hrm, why didn't that work ... maybe no mapping */
				if (addr >= FIXED_CODE_START &&
				    addr + to_copy <= FIXED_CODE_END) {
					copy_from_user_page(0, 0, 0, &tmp, paddr, to_copy);
					copied = to_copy;
				} else if (addr >= BOOT_ROM_START) {
					memcpy(&tmp, paddr, to_copy);
					copied = to_copy;
				}

				break;
			case BFIN_MEM_ACCESS_DMA:
				if (safe_dma_memcpy(&tmp, paddr, to_copy))
					copied = to_copy;
				break;
			case BFIN_MEM_ACCESS_ITEST:
				if (isram_memcpy(&tmp, paddr, to_copy))
					copied = to_copy;
				break;
			default:
				copied = 0;
				break;
			}

			pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
			if (copied == to_copy)
				ret = put_user(tmp, datap);
			break;
		}

		/* when I and D space are separate, this will have to be fixed. */
	case PTRACE_POKEDATA:
		pr_debug("ptrace: PTRACE_PEEKDATA\n");
		/* fall through */
	case PTRACE_POKETEXT:	/* write the word at location addr. */
		{
			int copied = 0, to_copy = sizeof(data);

			ret = -EIO;
			pr_debug("ptrace: POKETEXT at addr 0x%08lx + %i bytes %lx\n",
			         addr, to_copy, data);
			if (is_user_addr_valid(child, addr, to_copy) < 0)
				break;
			pr_debug("ptrace: user address is valid\n");

			switch (bfin_mem_access_type(addr, to_copy)) {
			case BFIN_MEM_ACCESS_CORE:
			case BFIN_MEM_ACCESS_CORE_ONLY:
				copied = access_process_vm(child, addr, &data,
				                           to_copy, 1);
				break;
			case BFIN_MEM_ACCESS_DMA:
				if (safe_dma_memcpy(paddr, &data, to_copy))
					copied = to_copy;
				break;
			case BFIN_MEM_ACCESS_ITEST:
				if (isram_memcpy(paddr, &data, to_copy))
					copied = to_copy;
				break;
			default:
				copied = 0;
				break;
			}

			pr_debug("ptrace: copied size %d\n", copied);
			if (copied == to_copy)
				ret = 0;
			break;
		}

	case PTRACE_PEEKUSR:
		switch (addr) {
#ifdef CONFIG_BINFMT_ELF_FDPIC	/* backwards compat */
		case PT_FDPIC_EXEC:
			request = PTRACE_GETFDPIC;
			addr = PTRACE_GETFDPIC_EXEC;
			goto case_default;
		case PT_FDPIC_INTERP:
			request = PTRACE_GETFDPIC;
			addr = PTRACE_GETFDPIC_INTERP;
			goto case_default;
#endif
		default:
			ret = get_reg(child, addr, datap);
		}
		pr_debug("ptrace: PEEKUSR reg %li with %#lx = %i\n", addr, data, ret);
		break;

	case PTRACE_POKEUSR:
		ret = put_reg(child, addr, data);
		pr_debug("ptrace: POKEUSR reg %li with %li = %i\n", addr, data, ret);
		break;

	case PTRACE_GETREGS:
		pr_debug("ptrace: PTRACE_GETREGS\n");
		return copy_regset_to_user(child, &user_bfin_native_view,
					   REGSET_GENERAL,
					   0, sizeof(struct pt_regs),
					   (void __user *)data);

	case PTRACE_SETREGS:
		pr_debug("ptrace: PTRACE_SETREGS\n");
		return copy_regset_from_user(child, &user_bfin_native_view,
					     REGSET_GENERAL,
					     0, sizeof(struct pt_regs),
					     (const void __user *)data);

	case_default:
	default:
		ret = ptrace_request(child, request, addr, data);
		break;
	}

	return ret;
}

asmlinkage int syscall_trace_enter(struct pt_regs *regs)
{
	int ret = 0;

	if (test_thread_flag(TIF_SYSCALL_TRACE))
		ret = tracehook_report_syscall_entry(regs);

	return ret;
}

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

	step = test_thread_flag(TIF_SINGLESTEP);
	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
		tracehook_report_syscall_exit(regs, step);
}
Commit	Line	Data
1394f032	1	/*
96f1050d	2	* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
e8f263df	3	* these modifications are Copyright 2004-2010 Analog Devices Inc.
1394f032	4	*
96f1050d	5	* Licensed under the GPL-2
1394f032 BW	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/sched.h>
	10	#include <linux/mm.h>
	11	#include <linux/smp.h>
e50e2f25	12	#include <linux/elf.h>
1394f032 BW	13	#include <linux/errno.h>
	14	#include <linux/ptrace.h>
	15	#include <linux/user.h>
e50e2f25	16	#include <linux/regset.h>
1394f032	17	#include <linux/signal.h>
e8f263df	18	#include <linux/tracehook.h>
1f83b8f1	19	#include <linux/uaccess.h>
1394f032	20
1394f032 BW	21	#include <asm/page.h>
	22	#include <asm/pgtable.h>
	23	#include <asm/system.h>
	24	#include <asm/processor.h>
	25	#include <asm/asm-offsets.h>
	26	#include <asm/dma.h>
26156397	27	#include <asm/fixed_code.h>
7786ce82	28	#include <asm/cacheflush.h>
dbc895f9	29	#include <asm/mem_map.h>
1394f032	30
1394f032 BW	31	/*
	32	* does not yet catch signals sent when the child dies.
	33	* in exit.c or in signal.c.
	34	*/
	35
1394f032 BW	36	/*
	37	* Get contents of register REGNO in task TASK.
	38	*/
f2ce4802 MF	39	static inline long
f2ce4802 MF	40	get_reg(struct task_struct task, long regno, unsigned long __user datap)
1394f032	41	{
f2ce4802 MF	42	long tmp;
f2ce4802 MF	43	struct pt_regs *regs = task_pt_regs(task);
1394f032	44
f2ce4802 MF	45	if (regno & 3 \|\| regno > PT_LAST_PSEUDO \|\| regno < 0)
f2ce4802 MF	46	return -EIO;
1394f032 BW	47
1394f032 BW	48	switch (regno) {
f2ce4802 MF	49	case PT_TEXT_ADDR:
	50	tmp = task->mm->start_code;
	51	break;
	52	case PT_TEXT_END_ADDR:
	53	tmp = task->mm->end_code;
	54	break;
	55	case PT_DATA_ADDR:
	56	tmp = task->mm->start_data;
	57	break;
1394f032	58	case PT_USP:
f2ce4802 MF	59	tmp = task->thread.usp;
f2ce4802 MF	60	break;
1394f032	61	default:
f2ce4802 MF	62	if (regno < sizeof(*regs)) {
	63	void *reg_ptr = regs;
	64	tmp = (long )(reg_ptr + regno);
	65	} else
	66	return -EIO;
1394f032	67	}
1394f032	68
f2ce4802	69	return put_user(tmp, datap);
1394f032 BW	70	}
	71
	72	/*
	73	* Write contents of register REGNO in task TASK.
	74	*/
	75	static inline int
f2ce4802	76	put_reg(struct task_struct *task, long regno, unsigned long data)
1394f032	77	{
f2ce4802	78	struct pt_regs *regs = task_pt_regs(task);
1394f032	79
f2ce4802 MF	80	if (regno & 3 \|\| regno > PT_LAST_PSEUDO \|\| regno < 0)
f2ce4802 MF	81	return -EIO;
1394f032 BW	82
	83	switch (regno) {
	84	case PT_PC:
	85	/*********************************************************************/
	86	/* At this point the kernel is most likely in exception. */
	87	/* The RETX register will be used to populate the pc of the process. */
	88	/*********************************************************************/
	89	regs->retx = data;
	90	regs->pc = data;
	91	break;
	92	case PT_RETX:
	93	break; /* regs->retx = data; break; */
	94	case PT_USP:
	95	regs->usp = data;
	96	task->thread.usp = data;
	97	break;
f2ce4802 MF	98	case PT_SYSCFG: /* don't let userspace screw with this */
	99	if ((data & ~1) != 0x6)
	100	pr_warning("ptrace: ignore syscfg write of %#lx\n", data);
	101	break; /* regs->syscfg = data; break; */
1394f032	102	default:
f2ce4802 MF	103	if (regno < sizeof(*regs)) {
	104	void *reg_offset = regs;
	105	(long )(reg_offset + regno) = data;
	106	}
	107	/* Ignore writes to pseudo registers */
1394f032	108	}
f2ce4802	109
1394f032 BW	110	return 0;
	111	}
	112
	113	/*
	114	* check that an address falls within the bounds of the target process's memory mappings
	115	*/
	116	static inline int is_user_addr_valid(struct task_struct *child,
	117	unsigned long start, unsigned long len)
	118	{
8feae131	119	struct vm_area_struct *vma;
1394f032 BW	120	struct sram_list_struct *sraml;
1394f032 BW	121
3c08f1d1 MF	122	/* overflow */
	123	if (start + len < start)
	124	return -EIO;
	125
8feae131 DH	126	vma = find_vma(child->mm, start);
8feae131 DH	127	if (vma && start >= vma->vm_start && start + len <= vma->vm_end)
1394f032 BW	128	return 0;
	129
	130	for (sraml = child->mm->context.sram_list; sraml; sraml = sraml->next)
	131	if (start >= (unsigned long)sraml->addr
d207a8c7	132	&& start + len < (unsigned long)sraml->addr + sraml->length)
1394f032 BW	133	return 0;
1394f032 BW	134
d207a8c7	135	if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)
26156397 JZ	136	return 0;
26156397 JZ	137
1394f032 BW	138	return -EIO;
	139	}
	140
e50e2f25 MF	141	/*
	142	* retrieve the contents of Blackfin userspace general registers
	143	*/
	144	static int genregs_get(struct task_struct *target,
	145	const struct user_regset *regset,
	146	unsigned int pos, unsigned int count,
	147	void kbuf, void __user ubuf)
	148	{
	149	struct pt_regs *regs = task_pt_regs(target);
	150	int ret;
	151
	152	/* This sucks ... */
	153	regs->usp = target->thread.usp;
	154
	155	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
	156	regs, 0, sizeof(*regs));
	157	if (ret < 0)
	158	return ret;
	159
	160	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
	161	sizeof(*regs), -1);
	162	}
	163
	164	/*
	165	* update the contents of the Blackfin userspace general registers
	166	*/
	167	static int genregs_set(struct task_struct *target,
	168	const struct user_regset *regset,
	169	unsigned int pos, unsigned int count,
	170	const void kbuf, const void __user ubuf)
	171	{
	172	struct pt_regs *regs = task_pt_regs(target);
	173	int ret;
	174
	175	/* Don't let people set SYSCFG (it's at the end of pt_regs) */
	176	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
	177	regs, 0, PT_SYSCFG);
	178	if (ret < 0)
	179	return ret;
	180
	181	/* This sucks ... */
	182	target->thread.usp = regs->usp;
	183	/* regs->retx = regs->pc; */
	184
	185	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
	186	PT_SYSCFG, -1);
	187	}
	188
	189	/*
	190	* Define the register sets available on the Blackfin under Linux
	191	*/
	192	enum bfin_regset {
	193	REGSET_GENERAL,
	194	};
	195
	196	static const struct user_regset bfin_regsets[] = {
	197	[REGSET_GENERAL] = {
	198	.core_note_type = NT_PRSTATUS,
	199	.n = sizeof(struct pt_regs) / sizeof(long),
	200	.size = sizeof(long),
	201	.align = sizeof(long),
	202	.get = genregs_get,
	203	.set = genregs_set,
	204	},
205	};
206
207	static const struct user_regset_view user_bfin_native_view = {
208	.name = "Blackfin",
209	.e_machine = EM_BLACKFIN,
210	.regsets = bfin_regsets,
211	.n = ARRAY_SIZE(bfin_regsets),
212	};
213
214	const struct user_regset_view task_user_regset_view(struct task_struct task)
215	{
216	return &user_bfin_native_view;
217	}
218
e8f263df	219	void user_enable_single_step(struct task_struct *child)
cb4c173d	220	{
5f09c77d MF	221	struct pt_regs *regs = task_pt_regs(child);
5f09c77d MF	222	regs->syscfg \|= SYSCFG_SSSTEP;
600482c1 MF	223
600482c1 MF	224	set_tsk_thread_flag(child, TIF_SINGLESTEP);
cb4c173d MF	225	}
cb4c173d MF	226
e8f263df	227	void user_disable_single_step(struct task_struct *child)
1394f032	228	{
5f09c77d MF	229	struct pt_regs *regs = task_pt_regs(child);
5f09c77d MF	230	regs->syscfg &= ~SYSCFG_SSSTEP;
600482c1 MF	231
600482c1 MF	232	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
1394f032 BW	233	}
	234
	235	long arch_ptrace(struct task_struct *child, long request, long addr, long data)
	236	{
	237	int ret;
0ddeeca2	238	unsigned long __user datap = (unsigned long __user )data;
c014e15a	239	void paddr = (void )addr;
1394f032 BW	240
	241	switch (request) {
	242	/* when I and D space are separate, these will need to be fixed. */
	243	case PTRACE_PEEKDATA:
	244	pr_debug("ptrace: PEEKDATA\n");
1394f032 BW	245	/* fall through */
	246	case PTRACE_PEEKTEXT: /* read word at location addr. */
	247	{
	248	unsigned long tmp = 0;
c014e15a	249	int copied = 0, to_copy = sizeof(tmp);
1394f032 BW	250
1394f032 BW	251	ret = -EIO;
c014e15a MF	252	pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + %i\n", addr, to_copy);
c014e15a MF	253	if (is_user_addr_valid(child, addr, to_copy) < 0)
1394f032 BW	254	break;
	255	pr_debug("ptrace: user address is valid\n");
	256
c014e15a MF	257	switch (bfin_mem_access_type(addr, to_copy)) {
	258	case BFIN_MEM_ACCESS_CORE:
	259	case BFIN_MEM_ACCESS_CORE_ONLY:
dabaad5b	260	copied = access_process_vm(child, addr, &tmp,
c014e15a MF	261	to_copy, 0);
	262	if (copied)
	263	break;
	264
	265	/* hrm, why didn't that work ... maybe no mapping */
	266	if (addr >= FIXED_CODE_START &&
	267	addr + to_copy <= FIXED_CODE_END) {
	268	copy_from_user_page(0, 0, 0, &tmp, paddr, to_copy);
	269	copied = to_copy;
	270	} else if (addr >= BOOT_ROM_START) {
	271	memcpy(&tmp, paddr, to_copy);
	272	copied = to_copy;
	273	}
d207a8c7	274
1394f032	275	break;
c014e15a MF	276	case BFIN_MEM_ACCESS_DMA:
	277	if (safe_dma_memcpy(&tmp, paddr, to_copy))
	278	copied = to_copy;
	279	break;
	280	case BFIN_MEM_ACCESS_ITEST:
	281	if (isram_memcpy(&tmp, paddr, to_copy))
	282	copied = to_copy;
	283	break;
	284	default:
	285	copied = 0;
	286	break;
	287	}
	288
	289	pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
	290	if (copied == to_copy)
	291	ret = put_user(tmp, datap);
1394f032 BW	292	break;
	293	}
	294
1394f032 BW	295	/* when I and D space are separate, this will have to be fixed. */
1394f032 BW	296	case PTRACE_POKEDATA:
d3ab3a62	297	pr_debug("ptrace: PTRACE_PEEKDATA\n");
1394f032 BW	298	/* fall through */
	299	case PTRACE_POKETEXT: /* write the word at location addr. */
	300	{
c014e15a	301	int copied = 0, to_copy = sizeof(data);
1394f032 BW	302
1394f032 BW	303	ret = -EIO;
c014e15a MF	304	pr_debug("ptrace: POKETEXT at addr 0x%08lx + %i bytes %lx\n",
	305	addr, to_copy, data);
	306	if (is_user_addr_valid(child, addr, to_copy) < 0)
1394f032 BW	307	break;
	308	pr_debug("ptrace: user address is valid\n");
	309
c014e15a MF	310	switch (bfin_mem_access_type(addr, to_copy)) {
	311	case BFIN_MEM_ACCESS_CORE:
	312	case BFIN_MEM_ACCESS_CORE_ONLY:
dabaad5b	313	copied = access_process_vm(child, addr, &data,
46b60faf	314	to_copy, 1);
1394f032	315	break;
c014e15a MF	316	case BFIN_MEM_ACCESS_DMA:
	317	if (safe_dma_memcpy(paddr, &data, to_copy))
	318	copied = to_copy;
	319	break;
	320	case BFIN_MEM_ACCESS_ITEST:
	321	if (isram_memcpy(paddr, &data, to_copy))
	322	copied = to_copy;
	323	break;
	324	default:
	325	copied = 0;
	326	break;
	327	}
	328
	329	pr_debug("ptrace: copied size %d\n", copied);
	330	if (copied == to_copy)
	331	ret = 0;
1394f032 BW	332	break;
	333	}
	334
f2ce4802 MF	335	case PTRACE_PEEKUSR:
	336	switch (addr) {
	337	#ifdef CONFIG_BINFMT_ELF_FDPIC /* backwards compat */
9c1a1259 MF	338	case PT_FDPIC_EXEC:
	339	request = PTRACE_GETFDPIC;
	340	addr = PTRACE_GETFDPIC_EXEC;
	341	goto case_default;
	342	case PT_FDPIC_INTERP:
	343	request = PTRACE_GETFDPIC;
	344	addr = PTRACE_GETFDPIC_INTERP;
	345	goto case_default;
f2ce4802 MF	346	#endif
	347	default:
	348	ret = get_reg(child, addr, datap);
1394f032	349	}
f2ce4802 MF	350	pr_debug("ptrace: PEEKUSR reg %li with %#lx = %i\n", addr, data, ret);
f2ce4802 MF	351	break;
1394f032	352
f2ce4802	353	case PTRACE_POKEUSR:
1394f032	354	ret = put_reg(child, addr, data);
f2ce4802	355	pr_debug("ptrace: POKEUSR reg %li with %li = %i\n", addr, data, ret);
1394f032 BW	356	break;
1394f032 BW	357
1394f032	358	case PTRACE_GETREGS:
e50e2f25 MF	359	pr_debug("ptrace: PTRACE_GETREGS\n");
	360	return copy_regset_to_user(child, &user_bfin_native_view,
	361	REGSET_GENERAL,
	362	0, sizeof(struct pt_regs),
	363	(void __user *)data);
1394f032 BW	364
1394f032 BW	365	case PTRACE_SETREGS:
e50e2f25 MF	366	pr_debug("ptrace: PTRACE_SETREGS\n");
	367	return copy_regset_from_user(child, &user_bfin_native_view,
	368	REGSET_GENERAL,
	369	0, sizeof(struct pt_regs),
	370	(const void __user *)data);
d3ab3a62	371
9c1a1259	372	case_default:
1394f032 BW	373	default:
	374	ret = ptrace_request(child, request, addr, data);
	375	break;
	376	}
	377
	378	return ret;
	379	}
	380
e8f263df	381	asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1394f032	382	{
e8f263df MF	383	int ret = 0;
	384
	385	if (test_thread_flag(TIF_SYSCALL_TRACE))
	386	ret = tracehook_report_syscall_entry(regs);
	387
	388	return ret;
	389	}
	390
	391	asmlinkage void syscall_trace_leave(struct pt_regs *regs)
	392	{
600482c1 MF	393	int step;
	394
	395	step = test_thread_flag(TIF_SINGLESTEP);
	396	if (step \|\| test_thread_flag(TIF_SYSCALL_TRACE))
	397	tracehook_report_syscall_exit(regs, step);
1394f032	398	}