[deliverable/linux.git] / arch / m68k / kernel / ptrace.c

/*
 *  linux/arch/m68k/kernel/ptrace.c
 *
 *  Copyright (C) 1994 by Hamish Macdonald
 *  Taken from linux/kernel/ptrace.c and modified for M680x0.
 *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
 *
 * 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/smp_lock.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/config.h>
#include <linux/signal.h>

#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>

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

/* determines which bits in the SR the user has access to. */
/* 1 = access 0 = no access */
#define SR_MASK 0x001f

/* sets the trace bits. */
#define TRACE_BITS 0x8000

/* Find the stack offset for a register, relative to thread.esp0. */
#define PT_REG(reg)	((long)&((struct pt_regs *)0)->reg)
#define SW_REG(reg)	((long)&((struct switch_stack *)0)->reg \
			 - sizeof(struct switch_stack))
/* Mapping from PT_xxx to the stack offset at which the register is
   saved.  Notice that usp has no stack-slot and needs to be treated
   specially (see get_reg/put_reg below). */
static int regoff[] = {
	[0]	= PT_REG(d1),
	[1]	= PT_REG(d2),
	[2]	= PT_REG(d3),
	[3]	= PT_REG(d4),
	[4]	= PT_REG(d5),
	[5]	= SW_REG(d6),
	[6]	= SW_REG(d7),
	[7]	= PT_REG(a0),
	[8]	= PT_REG(a1),
	[9]	= PT_REG(a2),
	[10]	= SW_REG(a3),
	[11]	= SW_REG(a4),
	[12]	= SW_REG(a5),
	[13]	= SW_REG(a6),
	[14]	= PT_REG(d0),
	[15]	= -1,
	[16]	= PT_REG(orig_d0),
	[17]	= PT_REG(sr),
	[18]	= PT_REG(pc),
};

/*
 * Get contents of register REGNO in task TASK.
 */
static inline long get_reg(struct task_struct *task, int regno)
{
	unsigned long *addr;

	if (regno == PT_USP)
		addr = &task->thread.usp;
	else if (regno < sizeof(regoff)/sizeof(regoff[0]))
		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
	else
		return 0;
	return *addr;
}

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

	if (regno == PT_USP)
		addr = &task->thread.usp;
	else if (regno < sizeof(regoff)/sizeof(regoff[0]))
		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
	else
		return -1;
	*addr = data;
	return 0;
}

/*
 * Called by kernel/ptrace.c when detaching..
 *
 * Make sure the single step bit is not set.
 */
void ptrace_disable(struct task_struct *child)
{
	unsigned long tmp;
	/* make sure the single step bit is not set. */
	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
	put_reg(child, PT_SR, tmp);
	child->thread.work.delayed_trace = 0;
	child->thread.work.syscall_trace = 0;
}

asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
{
	struct task_struct *child;
	int ret;

	lock_kernel();
	ret = -EPERM;
	if (request == PTRACE_TRACEME) {
		/* are we already being traced? */
		if (current->ptrace & PT_PTRACED)
			goto out;
		/* set the ptrace bit in the process flags. */
		current->ptrace |= PT_PTRACED;
		ret = 0;
		goto out;
	}
	ret = -ESRCH;
	read_lock(&tasklist_lock);
	child = find_task_by_pid(pid);
	if (child)
		get_task_struct(child);
	read_unlock(&tasklist_lock);
	if (!child)
		goto out;

	ret = -EPERM;
	if (pid == 1)		/* you may not mess with init */
		goto out_tsk;

	if (request == PTRACE_ATTACH) {
		ret = ptrace_attach(child);
		goto out_tsk;
	}

	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	if (ret < 0)
		goto out_tsk;

	switch (request) {
	/* when I and D space are separate, these will need to be fixed. */
	case PTRACE_PEEKTEXT:	/* read word at location addr. */
	case PTRACE_PEEKDATA: {
		unsigned long tmp;
		int copied;

		copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
		ret = -EIO;
		if (copied != sizeof(tmp))
			break;
		ret = put_user(tmp, (unsigned long *)data);
		break;
	}

	/* 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;

		tmp = 0;  /* Default return condition */
		addr = addr >> 2; /* temporary hack. */
		ret = -EIO;
		if (addr < 19) {
			tmp = get_reg(child, addr);
			if (addr == PT_SR)
				tmp >>= 16;
		} else if (addr >= 21 && addr < 49) {
			tmp = child->thread.fp[addr - 21];
#ifdef CONFIG_M68KFPU_EMU
			/* Convert internal fpu reg representation
			 * into long double format
			 */
			if (FPU_IS_EMU && (addr < 45) && !(addr % 3))
				tmp = ((tmp & 0xffff0000) << 15) |
				      ((tmp & 0x0000ffff) << 16);
#endif
		} else
			break;
		ret = put_user(tmp, (unsigned long *)data);
		break;
	}

	/* when I and D space are separate, this will have to be fixed. */
	case PTRACE_POKETEXT:	/* write the word at location addr. */
	case PTRACE_POKEDATA:
		ret = 0;
		if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
			break;
		ret = -EIO;
		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;

		addr = addr >> 2; /* temporary hack. */

		if (addr == PT_SR) {
			data &= SR_MASK;
			data <<= 16;
			data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
		}
		if (addr < 19) {
			if (put_reg(child, addr, data))
				break;
			ret = 0;
			break;
		}
		if (addr >= 21 && addr < 48) {
#ifdef CONFIG_M68KFPU_EMU
			/* Convert long double format
			 * into internal fpu reg representation
			 */
			if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) {
				data = (unsigned long)data << 15;
				data = (data & 0xffff0000) |
				       ((data & 0x0000ffff) >> 1);
			}
#endif
			child->thread.fp[addr - 21] = data;
			ret = 0;
		}
		break;

	case PTRACE_SYSCALL:	/* continue and stop at next (return from) syscall */
	case PTRACE_CONT: {	/* restart after signal. */
		long tmp;

		ret = -EIO;
		if (!valid_signal(data))
			break;
		if (request == PTRACE_SYSCALL) {
			child->thread.work.syscall_trace = ~0;
		} else {
			child->thread.work.syscall_trace = 0;
		}
		child->exit_code = data;
		/* make sure the single step bit is not set. */
		tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
		put_reg(child, PT_SR, tmp);
		child->thread.work.delayed_trace = 0;
		wake_up_process(child);
		ret = 0;
		break;
	}

	/*
	 * make the child exit.  Best I can do is send it a sigkill.
	 * perhaps it should be put in the status that it wants to
	 * exit.
	 */
	case PTRACE_KILL: {
		long tmp;

		ret = 0;
		if (child->exit_state == EXIT_ZOMBIE) /* already dead */
			break;
		child->exit_code = SIGKILL;
		/* make sure the single step bit is not set. */
		tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
		put_reg(child, PT_SR, tmp);
		child->thread.work.delayed_trace = 0;
		wake_up_process(child);
		break;
	}

	case PTRACE_SINGLESTEP: {  /* set the trap flag. */
		long tmp;

		ret = -EIO;
		if (!valid_signal(data))
			break;
		child->thread.work.syscall_trace = 0;
		tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);
		put_reg(child, PT_SR, tmp);
		child->thread.work.delayed_trace = 1;

		child->exit_code = data;
		/* give it a chance to run. */
		wake_up_process(child);
		ret = 0;
		break;
	}

	case PTRACE_DETACH:	/* detach a process that was attached. */
		ret = ptrace_detach(child, data);
		break;

	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
		int i;
		unsigned long tmp;
		for (i = 0; i < 19; i++) {
			tmp = get_reg(child, i);
			if (i == PT_SR)
				tmp >>= 16;
			if (put_user(tmp, (unsigned long *)data)) {
				ret = -EFAULT;
				break;
			}
			data += sizeof(long);
		}
		ret = 0;
		break;
	}

	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
		int i;
		unsigned long tmp;
		for (i = 0; i < 19; i++) {
			if (get_user(tmp, (unsigned long *)data)) {
				ret = -EFAULT;
				break;
			}
			if (i == PT_SR) {
				tmp &= SR_MASK;
				tmp <<= 16;
				tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
			}
			put_reg(child, i, tmp);
			data += sizeof(long);
		}
		ret = 0;
		break;
	}

	case PTRACE_GETFPREGS: { /* Get the child FPU state. */
		ret = 0;
		if (copy_to_user((void *)data, &child->thread.fp,
				 sizeof(struct user_m68kfp_struct)))
			ret = -EFAULT;
		break;
	}

	case PTRACE_SETFPREGS: { /* Set the child FPU state. */
		ret = 0;
		if (copy_from_user(&child->thread.fp, (void *)data,
				   sizeof(struct user_m68kfp_struct)))
			ret = -EFAULT;
		break;
	}

	default:
		ret = ptrace_request(child, request, addr, data);
		break;
	}
out_tsk:
	put_task_struct(child);
out:
	unlock_kernel();
	return ret;
}

asmlinkage void syscall_trace(void)
{
	if (!current->thread.work.delayed_trace &&
	    !current->thread.work.syscall_trace)
		return;
	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
				 ? 0x80 : 0));
	/*
	 * this isn't the same as continuing with a signal, but it will do
	 * for normal use.  strace only continues with a signal if the
	 * stopping signal is not SIGTRAP.  -brl
	 */
	if (current->exit_code) {
		send_sig(current->exit_code, current, 1);
		current->exit_code = 0;
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/m68k/kernel/ptrace.c
	3	*
	4	* Copyright (C) 1994 by Hamish Macdonald
	5	* Taken from linux/kernel/ptrace.c and modified for M680x0.
	6	* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
	7	*
	8	* This file is subject to the terms and conditions of the GNU General
	9	* Public License. See the file COPYING in the main directory of
	10	* this archive for more details.
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/sched.h>
	15	#include <linux/mm.h>
	16	#include <linux/smp.h>
	17	#include <linux/smp_lock.h>
	18	#include <linux/errno.h>
	19	#include <linux/ptrace.h>
	20	#include <linux/user.h>
	21	#include <linux/config.h>
7ed20e1a	22	#include <linux/signal.h>
1da177e4 LT	23
	24	#include <asm/uaccess.h>
	25	#include <asm/page.h>
	26	#include <asm/pgtable.h>
	27	#include <asm/system.h>
	28	#include <asm/processor.h>
	29
	30	/*
	31	* does not yet catch signals sent when the child dies.
	32	* in exit.c or in signal.c.
	33	*/
	34
	35	/* determines which bits in the SR the user has access to. */
	36	/* 1 = access 0 = no access */
	37	#define SR_MASK 0x001f
	38
	39	/* sets the trace bits. */
	40	#define TRACE_BITS 0x8000
	41
	42	/* Find the stack offset for a register, relative to thread.esp0. */
	43	#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg)
	44	#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \
	45	- sizeof(struct switch_stack))
	46	/* Mapping from PT_xxx to the stack offset at which the register is
	47	saved. Notice that usp has no stack-slot and needs to be treated
	48	specially (see get_reg/put_reg below). */
	49	static int regoff[] = {
	50	[0] = PT_REG(d1),
	51	[1] = PT_REG(d2),
	52	[2] = PT_REG(d3),
	53	[3] = PT_REG(d4),
	54	[4] = PT_REG(d5),
	55	[5] = SW_REG(d6),
	56	[6] = SW_REG(d7),
	57	[7] = PT_REG(a0),
	58	[8] = PT_REG(a1),
	59	[9] = PT_REG(a2),
	60	[10] = SW_REG(a3),
	61	[11] = SW_REG(a4),
	62	[12] = SW_REG(a5),
	63	[13] = SW_REG(a6),
	64	[14] = PT_REG(d0),
	65	[15] = -1,
	66	[16] = PT_REG(orig_d0),
	67	[17] = PT_REG(sr),
	68	[18] = PT_REG(pc),
	69	};
	70
	71	/*
	72	* Get contents of register REGNO in task TASK.
	73	*/
	74	static inline long get_reg(struct task_struct *task, int regno)
	75	{
	76	unsigned long *addr;
	77
	78	if (regno == PT_USP)
	79	addr = &task->thread.usp;
	80	else if (regno < sizeof(regoff)/sizeof(regoff[0]))
	81	addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
	82	else
	83	return 0;
	84	return *addr;
	85	}
	86
87	/*
88	* Write contents of register REGNO in task TASK.
89	*/
90	static inline int put_reg(struct task_struct *task, int regno,
91	unsigned long data)
92	{
93	unsigned long *addr;
94
95	if (regno == PT_USP)
96	addr = &task->thread.usp;
97	else if (regno < sizeof(regoff)/sizeof(regoff[0]))
b3319f50	98	addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
1da177e4 LT	99	else
	100	return -1;
	101	*addr = data;
	102	return 0;
	103	}
	104
	105	/*
	106	* Called by kernel/ptrace.c when detaching..
	107	*
	108	* Make sure the single step bit is not set.
	109	*/
	110	void ptrace_disable(struct task_struct *child)
	111	{
	112	unsigned long tmp;
	113	/* make sure the single step bit is not set. */
	114	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
	115	put_reg(child, PT_SR, tmp);
	116	child->thread.work.delayed_trace = 0;
	117	child->thread.work.syscall_trace = 0;
	118	}
	119
	120	asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
	121	{
	122	struct task_struct *child;
	123	int ret;
	124
	125	lock_kernel();
	126	ret = -EPERM;
	127	if (request == PTRACE_TRACEME) {
	128	/* are we already being traced? */
	129	if (current->ptrace & PT_PTRACED)
	130	goto out;
	131	/* set the ptrace bit in the process flags. */
	132	current->ptrace \|= PT_PTRACED;
	133	ret = 0;
	134	goto out;
	135	}
	136	ret = -ESRCH;
	137	read_lock(&tasklist_lock);
	138	child = find_task_by_pid(pid);
	139	if (child)
	140	get_task_struct(child);
	141	read_unlock(&tasklist_lock);
	142	if (!child)
	143	goto out;
	144
	145	ret = -EPERM;
	146	if (pid == 1) /* you may not mess with init */
	147	goto out_tsk;
	148
	149	if (request == PTRACE_ATTACH) {
	150	ret = ptrace_attach(child);
	151	goto out_tsk;
	152	}
	153
	154	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	155	if (ret < 0)
	156	goto out_tsk;
	157
	158	switch (request) {
	159	/* when I and D space are separate, these will need to be fixed. */
b3319f50 RZ	160	case PTRACE_PEEKTEXT: /* read word at location addr. */
	161	case PTRACE_PEEKDATA: {
	162	unsigned long tmp;
	163	int copied;
	164
	165	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	166	ret = -EIO;
	167	if (copied != sizeof(tmp))
1da177e4	168	break;
b3319f50 RZ	169	ret = put_user(tmp, (unsigned long *)data);
	170	break;
	171	}
1da177e4 LT	172
1da177e4 LT	173	/* read the word at location addr in the USER area. */
b3319f50 RZ	174	case PTRACE_PEEKUSR: {
b3319f50 RZ	175	unsigned long tmp;
1da177e4	176
b3319f50 RZ	177	ret = -EIO;
	178	if ((addr & 3) \|\| addr < 0 \|\|
	179	addr > sizeof(struct user) - 3)
	180	break;
1da177e4	181
b3319f50 RZ	182	tmp = 0; /* Default return condition */
	183	addr = addr >> 2; /* temporary hack. */
	184	ret = -EIO;
	185	if (addr < 19) {
	186	tmp = get_reg(child, addr);
	187	if (addr == PT_SR)
	188	tmp >>= 16;
	189	} else if (addr >= 21 && addr < 49) {
	190	tmp = child->thread.fp[addr - 21];
1da177e4	191	#ifdef CONFIG_M68KFPU_EMU
b3319f50 RZ	192	/* Convert internal fpu reg representation
	193	* into long double format
	194	*/
	195	if (FPU_IS_EMU && (addr < 45) && !(addr % 3))
	196	tmp = ((tmp & 0xffff0000) << 15) \|
	197	((tmp & 0x0000ffff) << 16);
1da177e4	198	#endif
b3319f50	199	} else
1da177e4	200	break;
b3319f50 RZ	201	ret = put_user(tmp, (unsigned long *)data);
	202	break;
	203	}
1da177e4	204
b3319f50 RZ	205	/* when I and D space are separate, this will have to be fixed. */
	206	case PTRACE_POKETEXT: /* write the word at location addr. */
	207	case PTRACE_POKEDATA:
	208	ret = 0;
	209	if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
1da177e4	210	break;
b3319f50 RZ	211	ret = -EIO;
b3319f50 RZ	212	break;
1da177e4	213
b3319f50 RZ	214	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
	215	ret = -EIO;
	216	if ((addr & 3) \|\| addr < 0 \|\|
	217	addr > sizeof(struct user) - 3)
1da177e4 LT	218	break;
1da177e4 LT	219
b3319f50	220	addr = addr >> 2; /* temporary hack. */
1da177e4	221
b3319f50 RZ	222	if (addr == PT_SR) {
	223	data &= SR_MASK;
	224	data <<= 16;
	225	data \|= get_reg(child, PT_SR) & ~(SR_MASK << 16);
	226	}
	227	if (addr < 19) {
	228	if (put_reg(child, addr, data))
1da177e4	229	break;
1da177e4 LT	230	ret = 0;
	231	break;
	232	}
b3319f50 RZ	233	if (addr >= 21 && addr < 48) {
	234	#ifdef CONFIG_M68KFPU_EMU
	235	/* Convert long double format
	236	* into internal fpu reg representation
	237	*/
	238	if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) {
	239	data = (unsigned long)data << 15;
	240	data = (data & 0xffff0000) \|
	241	((data & 0x0000ffff) >> 1);
	242	}
	243	#endif
	244	child->thread.fp[addr - 21] = data;
1da177e4	245	ret = 0;
1da177e4	246	}
b3319f50	247	break;
1da177e4	248
b3319f50 RZ	249	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
	250	case PTRACE_CONT: { /* restart after signal. */
	251	long tmp;
1da177e4	252
b3319f50 RZ	253	ret = -EIO;
	254	if (!valid_signal(data))
	255	break;
	256	if (request == PTRACE_SYSCALL) {
	257	child->thread.work.syscall_trace = ~0;
	258	} else {
1da177e4	259	child->thread.work.syscall_trace = 0;
b3319f50 RZ	260	}
	261	child->exit_code = data;
	262	/* make sure the single step bit is not set. */
	263	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
	264	put_reg(child, PT_SR, tmp);
	265	child->thread.work.delayed_trace = 0;
	266	wake_up_process(child);
	267	ret = 0;
	268	break;
	269	}
1da177e4	270
b3319f50 RZ	271	/*
	272	* make the child exit. Best I can do is send it a sigkill.
	273	* perhaps it should be put in the status that it wants to
	274	* exit.
	275	*/
	276	case PTRACE_KILL: {
	277	long tmp;
	278
	279	ret = 0;
	280	if (child->exit_state == EXIT_ZOMBIE) /* already dead */
1da177e4	281	break;
b3319f50 RZ	282	child->exit_code = SIGKILL;
	283	/* make sure the single step bit is not set. */
	284	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
	285	put_reg(child, PT_SR, tmp);
	286	child->thread.work.delayed_trace = 0;
	287	wake_up_process(child);
	288	break;
	289	}
	290
	291	case PTRACE_SINGLESTEP: { /* set the trap flag. */
	292	long tmp;
1da177e4	293
b3319f50 RZ	294	ret = -EIO;
b3319f50 RZ	295	if (!valid_signal(data))
1da177e4	296	break;
b3319f50 RZ	297	child->thread.work.syscall_trace = 0;
	298	tmp = get_reg(child, PT_SR) \| (TRACE_BITS << 16);
	299	put_reg(child, PT_SR, tmp);
	300	child->thread.work.delayed_trace = 1;
	301
	302	child->exit_code = data;
	303	/* give it a chance to run. */
	304	wake_up_process(child);
	305	ret = 0;
	306	break;
	307	}
	308
	309	case PTRACE_DETACH: /* detach a process that was attached. */
	310	ret = ptrace_detach(child, data);
	311	break;
1da177e4	312
b3319f50 RZ	313	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
	314	int i;
	315	unsigned long tmp;
	316	for (i = 0; i < 19; i++) {
	317	tmp = get_reg(child, i);
	318	if (i == PT_SR)
1da177e4	319	tmp >>= 16;
b3319f50	320	if (put_user(tmp, (unsigned long *)data)) {
1da177e4 LT	321	ret = -EFAULT;
1da177e4 LT	322	break;
1da177e4	323	}
b3319f50	324	data += sizeof(long);
1da177e4	325	}
b3319f50 RZ	326	ret = 0;
	327	break;
	328	}
1da177e4	329
b3319f50 RZ	330	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
	331	int i;
	332	unsigned long tmp;
	333	for (i = 0; i < 19; i++) {
	334	if (get_user(tmp, (unsigned long *)data)) {
1da177e4 LT	335	ret = -EFAULT;
1da177e4 LT	336	break;
b3319f50 RZ	337	}
b3319f50 RZ	338	if (i == PT_SR) {
1da177e4 LT	339	tmp &= SR_MASK;
	340	tmp <<= 16;
	341	tmp \|= get_reg(child, PT_SR) & ~(SR_MASK << 16);
1da177e4	342	}
b3319f50 RZ	343	put_reg(child, i, tmp);
b3319f50 RZ	344	data += sizeof(long);
1da177e4	345	}
b3319f50 RZ	346	ret = 0;
	347	break;
	348	}
1da177e4	349
b3319f50 RZ	350	case PTRACE_GETFPREGS: { /* Get the child FPU state. */
	351	ret = 0;
	352	if (copy_to_user((void *)data, &child->thread.fp,
	353	sizeof(struct user_m68kfp_struct)))
	354	ret = -EFAULT;
	355	break;
	356	}
1da177e4	357
b3319f50 RZ	358	case PTRACE_SETFPREGS: { /* Set the child FPU state. */
	359	ret = 0;
	360	if (copy_from_user(&child->thread.fp, (void *)data,
	361	sizeof(struct user_m68kfp_struct)))
	362	ret = -EFAULT;
	363	break;
	364	}
1da177e4	365
b3319f50 RZ	366	default:
	367	ret = ptrace_request(child, request, addr, data);
	368	break;
1da177e4 LT	369	}
	370	out_tsk:
	371	put_task_struct(child);
	372	out:
	373	unlock_kernel();
	374	return ret;
	375	}
	376
	377	asmlinkage void syscall_trace(void)
	378	{
	379	if (!current->thread.work.delayed_trace &&
	380	!current->thread.work.syscall_trace)
	381	return;
	382	ptrace_notify(SIGTRAP \| ((current->ptrace & PT_TRACESYSGOOD)
	383	? 0x80 : 0));
	384	/*
	385	* this isn't the same as continuing with a signal, but it will do
	386	* for normal use. strace only continues with a signal if the
	387	* stopping signal is not SIGTRAP. -brl
	388	*/
	389	if (current->exit_code) {
	390	send_sig(current->exit_code, current, 1);
	391	current->exit_code = 0;
	392	}
	393	}