[mirror_ubuntu-zesty-kernel.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;
}

/*
 * Make sure the single step bit is not set.
 */
static inline void singlestep_disable(struct task_struct *child)
{
	unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
	put_reg(child, PT_SR, tmp);
	child->thread.work.delayed_trace = 0;
}

/*
 * Called by kernel/ptrace.c when detaching..
 */
void ptrace_disable(struct task_struct *child)
{
	singlestep_disable(child);
	child->thread.work.syscall_trace = 0;
}

asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
{
	struct task_struct *child;
	unsigned long tmp;
	int i, ret = 0;

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

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

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

	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	if (ret)
		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:
		i = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
		if (i != sizeof(tmp))
			goto out_eio;
		ret = put_user(tmp, (unsigned long *)data);
		break;

	/* read the word at location addr in the USER area. */
	case PTRACE_PEEKUSR:
		if (addr & 3)
			goto out_eio;
		addr >>= 2;	/* temporary hack. */

		if (addr >= 0 && 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];
			/* Convert internal fpu reg representation
			 * into long double format
			 */
			if (FPU_IS_EMU && (addr < 45) && !(addr % 3))
				tmp = ((tmp & 0xffff0000) << 15) |
				      ((tmp & 0x0000ffff) << 16);
		} 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:
		if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
			goto out_eio;
		break;

	case PTRACE_POKEUSR:	/* write the word at location addr in the USER area */
		if (addr & 3)
			goto out_eio;
		addr >>= 2;	/* temporary hack. */

		if (addr == PT_SR) {
			data &= SR_MASK;
			data <<= 16;
			data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
		} else if (addr >= 0 && addr < 19) {
			if (put_reg(child, addr, data))
				goto out_eio;
		} else if (addr >= 21 && addr < 48) {
			/* 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);
			}
			child->thread.fp[addr - 21] = data;
		} else
			goto out_eio;
		break;

	case PTRACE_SYSCALL:	/* continue and stop at next (return from) syscall */
	case PTRACE_CONT:	/* restart after signal. */
		if (!valid_signal(data))
			goto out_eio;

		if (request == PTRACE_SYSCALL)
			child->thread.work.syscall_trace = ~0;
		else
			child->thread.work.syscall_trace = 0;
		child->exit_code = data;
		singlestep_disable(child);
		wake_up_process(child);
		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:
		if (child->exit_state == EXIT_ZOMBIE) /* already dead */
			break;
		child->exit_code = SIGKILL;
		singlestep_disable(child);
		wake_up_process(child);
		break;

	case PTRACE_SINGLESTEP:	/* set the trap flag. */
		if (!valid_signal(data))
			goto out_eio;

		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);
		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. */
		for (i = 0; i < 19; i++) {
			tmp = get_reg(child, i);
			if (i == PT_SR)
				tmp >>= 16;
			ret = put_user(tmp, (unsigned long *)data);
			if (ret)
				break;
			data += sizeof(long);
		}
		break;

	case PTRACE_SETREGS:	/* Set all gp regs in the child. */
		for (i = 0; i < 19; i++) {
			ret = get_user(tmp, (unsigned long *)data);
			if (ret)
				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);
		}
		break;

	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
		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. */
		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;
out_eio:
	ret = -EIO;
	goto out_tsk;
}

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	/*
1da177e4 LT	106	* Make sure the single step bit is not set.
1da177e4 LT	107	*/
69f447cf	108	static inline void singlestep_disable(struct task_struct *child)
1da177e4	109	{
69f447cf	110	unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
1da177e4 LT	111	put_reg(child, PT_SR, tmp);
1da177e4 LT	112	child->thread.work.delayed_trace = 0;
69f447cf RZ	113	}
	114
	115	/*
	116	* Called by kernel/ptrace.c when detaching..
	117	*/
	118	void ptrace_disable(struct task_struct *child)
	119	{
	120	singlestep_disable(child);
1da177e4 LT	121	child->thread.work.syscall_trace = 0;
	122	}
	123
dfb7dac3	124	asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
1da177e4 LT	125	{
1da177e4 LT	126	struct task_struct *child;
69f447cf RZ	127	unsigned long tmp;
69f447cf RZ	128	int i, ret = 0;
1da177e4 LT	129
1da177e4 LT	130	lock_kernel();
1da177e4 LT	131	if (request == PTRACE_TRACEME) {
1da177e4 LT	132	/* are we already being traced? */
69f447cf RZ	133	if (current->ptrace & PT_PTRACED) {
69f447cf RZ	134	ret = -EPERM;
1da177e4	135	goto out;
69f447cf	136	}
1da177e4 LT	137	/* set the ptrace bit in the process flags. */
1da177e4 LT	138	current->ptrace \|= PT_PTRACED;
1da177e4 LT	139	goto out;
1da177e4 LT	140	}
1da177e4 LT	141	read_lock(&tasklist_lock);
	142	child = find_task_by_pid(pid);
	143	if (child)
	144	get_task_struct(child);
	145	read_unlock(&tasklist_lock);
69f447cf RZ	146	if (unlikely(!child)) {
69f447cf RZ	147	ret = -ESRCH;
1da177e4	148	goto out;
69f447cf	149	}
1da177e4	150
69f447cf RZ	151	/* you may not mess with init */
	152	if (unlikely(pid == 1)) {
	153	ret = -EPERM;
1da177e4	154	goto out_tsk;
69f447cf	155	}
1da177e4 LT	156
	157	if (request == PTRACE_ATTACH) {
	158	ret = ptrace_attach(child);
	159	goto out_tsk;
	160	}
	161
	162	ret = ptrace_check_attach(child, request == PTRACE_KILL);
69f447cf	163	if (ret)
1da177e4 LT	164	goto out_tsk;
	165
	166	switch (request) {
	167	/* when I and D space are separate, these will need to be fixed. */
b3319f50	168	case PTRACE_PEEKTEXT: /* read word at location addr. */
69f447cf RZ	169	case PTRACE_PEEKDATA:
	170	i = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	171	if (i != sizeof(tmp))
	172	goto out_eio;
b3319f50 RZ	173	ret = put_user(tmp, (unsigned long *)data);
b3319f50 RZ	174	break;
1da177e4 LT	175
1da177e4 LT	176	/* read the word at location addr in the USER area. */
69f447cf RZ	177	case PTRACE_PEEKUSR:
	178	if (addr & 3)
	179	goto out_eio;
	180	addr >>= 2; /* temporary hack. */
1da177e4	181
69f447cf	182	if (addr >= 0 && addr < 19) {
b3319f50 RZ	183	tmp = get_reg(child, addr);
	184	if (addr == PT_SR)
	185	tmp >>= 16;
	186	} else if (addr >= 21 && addr < 49) {
	187	tmp = child->thread.fp[addr - 21];
b3319f50 RZ	188	/* Convert internal fpu reg representation
	189	* into long double format
	190	*/
	191	if (FPU_IS_EMU && (addr < 45) && !(addr % 3))
	192	tmp = ((tmp & 0xffff0000) << 15) \|
	193	((tmp & 0x0000ffff) << 16);
b3319f50	194	} else
1da177e4	195	break;
b3319f50 RZ	196	ret = put_user(tmp, (unsigned long *)data);
b3319f50 RZ	197	break;
1da177e4	198
b3319f50 RZ	199	/* when I and D space are separate, this will have to be fixed. */
	200	case PTRACE_POKETEXT: /* write the word at location addr. */
	201	case PTRACE_POKEDATA:
69f447cf RZ	202	if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
69f447cf RZ	203	goto out_eio;
b3319f50	204	break;
1da177e4	205
b3319f50	206	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
69f447cf RZ	207	if (addr & 3)
	208	goto out_eio;
	209	addr >>= 2; /* temporary hack. */
1da177e4	210
b3319f50 RZ	211	if (addr == PT_SR) {
	212	data &= SR_MASK;
	213	data <<= 16;
	214	data \|= get_reg(child, PT_SR) & ~(SR_MASK << 16);
69f447cf	215	} else if (addr >= 0 && addr < 19) {
b3319f50	216	if (put_reg(child, addr, data))
69f447cf RZ	217	goto out_eio;
69f447cf RZ	218	} else if (addr >= 21 && addr < 48) {
b3319f50 RZ	219	/* Convert long double format
	220	* into internal fpu reg representation
	221	*/
	222	if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) {
	223	data = (unsigned long)data << 15;
	224	data = (data & 0xffff0000) \|
	225	((data & 0x0000ffff) >> 1);
	226	}
b3319f50	227	child->thread.fp[addr - 21] = data;
69f447cf RZ	228	} else
69f447cf RZ	229	goto out_eio;
b3319f50	230	break;
1da177e4	231
b3319f50	232	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
69f447cf	233	case PTRACE_CONT: /* restart after signal. */
b3319f50	234	if (!valid_signal(data))
69f447cf RZ	235	goto out_eio;
	236
	237	if (request == PTRACE_SYSCALL)
b3319f50	238	child->thread.work.syscall_trace = ~0;
69f447cf	239	else
1da177e4	240	child->thread.work.syscall_trace = 0;
b3319f50	241	child->exit_code = data;
69f447cf	242	singlestep_disable(child);
b3319f50	243	wake_up_process(child);
b3319f50	244	break;
1da177e4	245
b3319f50 RZ	246	/*
	247	* make the child exit. Best I can do is send it a sigkill.
	248	* perhaps it should be put in the status that it wants to
	249	* exit.
	250	*/
69f447cf	251	case PTRACE_KILL:
b3319f50	252	if (child->exit_state == EXIT_ZOMBIE) /* already dead */
1da177e4	253	break;
b3319f50	254	child->exit_code = SIGKILL;
69f447cf	255	singlestep_disable(child);
b3319f50 RZ	256	wake_up_process(child);
b3319f50 RZ	257	break;
1da177e4	258
69f447cf	259	case PTRACE_SINGLESTEP: /* set the trap flag. */
b3319f50	260	if (!valid_signal(data))
69f447cf RZ	261	goto out_eio;
69f447cf RZ	262
b3319f50 RZ	263	child->thread.work.syscall_trace = 0;
	264	tmp = get_reg(child, PT_SR) \| (TRACE_BITS << 16);
	265	put_reg(child, PT_SR, tmp);
	266	child->thread.work.delayed_trace = 1;
	267
	268	child->exit_code = data;
	269	/* give it a chance to run. */
	270	wake_up_process(child);
b3319f50	271	break;
b3319f50 RZ	272
	273	case PTRACE_DETACH: /* detach a process that was attached. */
	274	ret = ptrace_detach(child, data);
	275	break;
1da177e4	276
69f447cf	277	case PTRACE_GETREGS: /* Get all gp regs from the child. */
b3319f50 RZ	278	for (i = 0; i < 19; i++) {
	279	tmp = get_reg(child, i);
	280	if (i == PT_SR)
1da177e4	281	tmp >>= 16;
69f447cf RZ	282	ret = put_user(tmp, (unsigned long *)data);
69f447cf RZ	283	if (ret)
1da177e4	284	break;
b3319f50	285	data += sizeof(long);
1da177e4	286	}
b3319f50	287	break;
1da177e4	288
69f447cf	289	case PTRACE_SETREGS: /* Set all gp regs in the child. */
b3319f50	290	for (i = 0; i < 19; i++) {
69f447cf RZ	291	ret = get_user(tmp, (unsigned long *)data);
69f447cf RZ	292	if (ret)
1da177e4	293	break;
b3319f50	294	if (i == PT_SR) {
1da177e4 LT	295	tmp &= SR_MASK;
	296	tmp <<= 16;
	297	tmp \|= get_reg(child, PT_SR) & ~(SR_MASK << 16);
1da177e4	298	}
b3319f50 RZ	299	put_reg(child, i, tmp);
b3319f50 RZ	300	data += sizeof(long);
1da177e4	301	}
b3319f50	302	break;
1da177e4	303
69f447cf	304	case PTRACE_GETFPREGS: /* Get the child FPU state. */
b3319f50 RZ	305	if (copy_to_user((void *)data, &child->thread.fp,
	306	sizeof(struct user_m68kfp_struct)))
	307	ret = -EFAULT;
	308	break;
1da177e4	309
69f447cf	310	case PTRACE_SETFPREGS: /* Set the child FPU state. */
b3319f50 RZ	311	if (copy_from_user(&child->thread.fp, (void *)data,
	312	sizeof(struct user_m68kfp_struct)))
	313	ret = -EFAULT;
	314	break;
1da177e4	315
b3319f50 RZ	316	default:
	317	ret = ptrace_request(child, request, addr, data);
	318	break;
1da177e4 LT	319	}
	320	out_tsk:
	321	put_task_struct(child);
	322	out:
	323	unlock_kernel();
	324	return ret;
69f447cf RZ	325	out_eio:
	326	ret = -EIO;
	327	goto out_tsk;
1da177e4 LT	328	}
	329
	330	asmlinkage void syscall_trace(void)
	331	{
	332	if (!current->thread.work.delayed_trace &&
	333	!current->thread.work.syscall_trace)
	334	return;
	335	ptrace_notify(SIGTRAP \| ((current->ptrace & PT_TRACESYSGOOD)
	336	? 0x80 : 0));
	337	/*
	338	* this isn't the same as continuing with a signal, but it will do
	339	* for normal use. strace only continues with a signal if the
	340	* stopping signal is not SIGTRAP. -brl
	341	*/
	342	if (current->exit_code) {
	343	send_sig(current->exit_code, current, 1);
	344	current->exit_code = 0;
	345	}
	346	}