[deliverable/linux.git] / arch / mips / kernel / ptrace32.c

/*
 * 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.
 *
 * Copyright (C) 1992 Ross Biro
 * Copyright (C) Linus Torvalds
 * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
 * Copyright (C) 1996 David S. Miller
 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
 * Copyright (C) 1999 MIPS Technologies, Inc.
 * Copyright (C) 2000 Ulf Carlsson
 *
 * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit
 * binaries.
 */
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/user.h>
#include <linux/security.h>

#include <asm/cpu.h>
#include <asm/dsp.h>
#include <asm/fpu.h>
#include <asm/mipsregs.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/bootinfo.h>

int ptrace_getregs (struct task_struct *child, __s64 __user *data);
int ptrace_setregs (struct task_struct *child, __s64 __user *data);

int ptrace_getfpregs (struct task_struct *child, __u32 __user *data);
int ptrace_setfpregs (struct task_struct *child, __u32 __user *data);

/*
 * Tracing a 32-bit process with a 64-bit strace and vice versa will not
 * work.  I don't know how to fix this.
 */
asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
{
	struct task_struct *child;
	int ret;

#if 0
	printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
	       (int) request, (int) pid, (unsigned long) addr,
	       (unsigned long) data);
#endif
	lock_kernel();
	ret = -EPERM;
	if (request == PTRACE_TRACEME) {
		/* are we already being traced? */
		if (current->ptrace & PT_PTRACED)
			goto out;
		if ((ret = security_ptrace(current->parent, current)))
			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 int 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 int *) (unsigned long) data);
		break;
	}

	/*
	 * Read 4 bytes of the other process' storage
	 *  data is a pointer specifying where the user wants the
	 *	4 bytes copied into
	 *  addr is a pointer in the user's storage that contains an 8 byte
	 *	address in the other process of the 4 bytes that is to be read
	 * (this is run in a 32-bit process looking at a 64-bit process)
	 * when I and D space are separate, these will need to be fixed.
	 */
	case PTRACE_PEEKTEXT_3264:
	case PTRACE_PEEKDATA_3264: {
		u32 tmp;
		int copied;
		u32 __user * addrOthers;

		ret = -EIO;

		/* Get the addr in the other process that we want to read */
		if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
			break;

		copied = access_process_vm(child, (u64)addrOthers, &tmp,
				sizeof(tmp), 0);
		if (copied != sizeof(tmp))
			break;
		ret = put_user(tmp, (u32 __user *) (unsigned long) data);
		break;
	}

	/* Read the word at location addr in the USER area. */
	case PTRACE_PEEKUSR: {
		struct pt_regs *regs;
		unsigned int tmp;

		regs = (struct pt_regs *) ((unsigned long) child->thread_info +
		       THREAD_SIZE - 32 - sizeof(struct pt_regs));
		ret = 0;  /* Default return value. */

		switch (addr) {
		case 0 ... 31:
			tmp = regs->regs[addr];
			break;
		case FPR_BASE ... FPR_BASE + 31:
			if (tsk_used_math(child)) {
				fpureg_t *fregs = get_fpu_regs(child);

				/*
				 * The odd registers are actually the high
				 * order bits of the values stored in the even
				 * registers - unless we're using r2k_switch.S.
				 */
				if (addr & 1)
					tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32);
				else
					tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff);
			} else {
				tmp = -1;	/* FP not yet used  */
			}
			break;
		case PC:
			tmp = regs->cp0_epc;
			break;
		case CAUSE:
			tmp = regs->cp0_cause;
			break;
		case BADVADDR:
			tmp = regs->cp0_badvaddr;
			break;
		case MMHI:
			tmp = regs->hi;
			break;
		case MMLO:
			tmp = regs->lo;
			break;
		case FPC_CSR:
			if (cpu_has_fpu)
				tmp = child->thread.fpu.hard.fcr31;
			else
				tmp = child->thread.fpu.soft.fcr31;
			break;
		case FPC_EIR: {	/* implementation / version register */
			unsigned int flags;

			if (!cpu_has_fpu)
				break;

			flags = read_c0_status();
			__enable_fpu();
			__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
			write_c0_status(flags);
			break;
		}
		case DSP_BASE ... DSP_BASE + 5:
			if (!cpu_has_dsp) {
				tmp = 0;
				ret = -EIO;
				goto out_tsk;
			}
			if (child->thread.dsp.used_dsp) {
				dspreg_t *dregs = __get_dsp_regs(child);
				tmp = (unsigned long) (dregs[addr - DSP_BASE]);
			} else {
				tmp = -1;	/* DSP registers yet used  */
			}
			break;
		case DSP_CONTROL:
			if (!cpu_has_dsp) {
				tmp = 0;
				ret = -EIO;
				goto out_tsk;
			}
			tmp = child->thread.dsp.dspcontrol;
			break;
		default:
			tmp = 0;
			ret = -EIO;
			goto out_tsk;
		}
		ret = put_user(tmp, (unsigned *) (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;

	/*
	 * Write 4 bytes into the other process' storage
	 *  data is the 4 bytes that the user wants written
	 *  addr is a pointer in the user's storage that contains an
	 *	8 byte address in the other process where the 4 bytes
	 *	that is to be written
	 * (this is run in a 32-bit process looking at a 64-bit process)
	 * when I and D space are separate, these will need to be fixed.
	 */
	case PTRACE_POKETEXT_3264:
	case PTRACE_POKEDATA_3264: {
		u32 __user * addrOthers;

		/* Get the addr in the other process that we want to write into */
		ret = -EIO;
		if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
			break;
		ret = 0;
		if (access_process_vm(child, (u64)addrOthers, &data,
					sizeof(data), 1) == sizeof(data))
			break;
		ret = -EIO;
		break;
	}

	case PTRACE_POKEUSR: {
		struct pt_regs *regs;
		ret = 0;
		regs = (struct pt_regs *) ((unsigned long) child->thread_info +
		       THREAD_SIZE - 32 - sizeof(struct pt_regs));

		switch (addr) {
		case 0 ... 31:
			regs->regs[addr] = data;
			break;
		case FPR_BASE ... FPR_BASE + 31: {
			fpureg_t *fregs = get_fpu_regs(child);

			if (!tsk_used_math(child)) {
				/* FP not yet used  */
				memset(&child->thread.fpu.hard, ~0,
				       sizeof(child->thread.fpu.hard));
				child->thread.fpu.hard.fcr31 = 0;
			}
			/*
			 * The odd registers are actually the high order bits
			 * of the values stored in the even registers - unless
			 * we're using r2k_switch.S.
			 */
			if (addr & 1) {
				fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff;
				fregs[(addr & ~1) - FPR_BASE] |= ((unsigned long long) data) << 32;
			} else {
				fregs[addr - FPR_BASE] &= ~0xffffffffLL;
				/* Must cast, lest sign extension fill upper
				   bits!  */
				fregs[addr - FPR_BASE] |= (unsigned int)data;
			}
			break;
		}
		case PC:
			regs->cp0_epc = data;
			break;
		case MMHI:
			regs->hi = data;
			break;
		case MMLO:
			regs->lo = data;
			break;
		case FPC_CSR:
			if (cpu_has_fpu)
				child->thread.fpu.hard.fcr31 = data;
			else
				child->thread.fpu.soft.fcr31 = data;
			break;
		case DSP_BASE ... DSP_BASE + 5:
			if (!cpu_has_dsp) {
				ret = -EIO;
				break;
			}

			dspreg_t *dregs = __get_dsp_regs(child);
			dregs[addr - DSP_BASE] = data;
			break;
		case DSP_CONTROL:
			if (!cpu_has_dsp) {
				ret = -EIO;
				break;
			}
			child->thread.dsp.dspcontrol = data;
			break;
		default:
			/* The rest are not allowed. */
			ret = -EIO;
			break;
		}
		break;
		}

	case PTRACE_GETREGS:
		ret = ptrace_getregs (child, (__u64 __user *) (__u64) data);
		break;

	case PTRACE_SETREGS:
		ret = ptrace_setregs (child, (__u64 __user *) (__u64) data);
		break;

	case PTRACE_GETFPREGS:
		ret = ptrace_getfpregs (child, (__u32 __user *) (__u64) data);
		break;

	case PTRACE_SETFPREGS:
		ret = ptrace_setfpregs (child, (__u32 __user *) (__u64) data);
		break;

	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
	case PTRACE_CONT: { /* restart after signal. */
		ret = -EIO;
		if (!valid_signal(data))
			break;
		if (request == PTRACE_SYSCALL) {
			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
		}
		else {
			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
		}
		child->exit_code = data;
		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:
		ret = 0;
		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
			break;
		child->exit_code = SIGKILL;
		wake_up_process(child);
		break;

	case PTRACE_GET_THREAD_AREA:
		ret = put_user(child->thread_info->tp_value,
				(unsigned int __user *) (unsigned long) data);
		break;

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

	case PTRACE_GETEVENTMSG:
		ret = put_user(child->ptrace_message,
			       (unsigned int __user *) (unsigned long) data);
		break;

	case PTRACE_GET_THREAD_AREA_3264:
		ret = put_user(child->thread_info->tp_value,
				(unsigned long __user *) (unsigned long) data);
		break;

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

out_tsk:
	put_task_struct(child);
out:
	unlock_kernel();
	return ret;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 1992 Ross Biro
	7	* Copyright (C) Linus Torvalds
	8	* Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
	9	* Copyright (C) 1996 David S. Miller
	10	* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
	11	* Copyright (C) 1999 MIPS Technologies, Inc.
	12	* Copyright (C) 2000 Ulf Carlsson
	13	*
	14	* At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit
	15	* binaries.
	16	*/
	17	#include <linux/compiler.h>
	18	#include <linux/kernel.h>
	19	#include <linux/sched.h>
	20	#include <linux/mm.h>
	21	#include <linux/errno.h>
	22	#include <linux/ptrace.h>
	23	#include <linux/smp.h>
	24	#include <linux/smp_lock.h>
	25	#include <linux/user.h>
	26	#include <linux/security.h>
	27
	28	#include <asm/cpu.h>
e50c0a8f	29	#include <asm/dsp.h>
1da177e4 LT	30	#include <asm/fpu.h>
	31	#include <asm/mipsregs.h>
	32	#include <asm/pgtable.h>
	33	#include <asm/page.h>
	34	#include <asm/system.h>
	35	#include <asm/uaccess.h>
	36	#include <asm/bootinfo.h>
	37
ea3d710f DJ	38	int ptrace_getregs (struct task_struct child, __s64 __user data);
	39	int ptrace_setregs (struct task_struct child, __s64 __user data);
	40
	41	int ptrace_getfpregs (struct task_struct child, __u32 __user data);
	42	int ptrace_setfpregs (struct task_struct child, __u32 __user data);
	43
1da177e4 LT	44	/*
	45	* Tracing a 32-bit process with a 64-bit strace and vice versa will not
	46	* work. I don't know how to fix this.
	47	*/
	48	asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
	49	{
	50	struct task_struct *child;
	51	int ret;
	52
	53	#if 0
	54	printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
	55	(int) request, (int) pid, (unsigned long) addr,
	56	(unsigned long) data);
	57	#endif
	58	lock_kernel();
	59	ret = -EPERM;
	60	if (request == PTRACE_TRACEME) {
	61	/* are we already being traced? */
	62	if (current->ptrace & PT_PTRACED)
	63	goto out;
	64	if ((ret = security_ptrace(current->parent, current)))
	65	goto out;
	66	/* set the ptrace bit in the process flags. */
	67	current->ptrace \|= PT_PTRACED;
	68	ret = 0;
	69	goto out;
	70	}
	71	ret = -ESRCH;
	72	read_lock(&tasklist_lock);
	73	child = find_task_by_pid(pid);
	74	if (child)
	75	get_task_struct(child);
	76	read_unlock(&tasklist_lock);
	77	if (!child)
	78	goto out;
	79
	80	ret = -EPERM;
	81	if (pid == 1) /* you may not mess with init */
	82	goto out_tsk;
	83
	84	if (request == PTRACE_ATTACH) {
	85	ret = ptrace_attach(child);
	86	goto out_tsk;
	87	}
	88
	89	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	90	if (ret < 0)
	91	goto out_tsk;
	92
	93	switch (request) {
	94	/* when I and D space are separate, these will need to be fixed. */
	95	case PTRACE_PEEKTEXT: /* read word at location addr. */
	96	case PTRACE_PEEKDATA: {
	97	unsigned int tmp;
	98	int copied;
	99
	100	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	101	ret = -EIO;
	102	if (copied != sizeof(tmp))
	103	break;
	104	ret = put_user(tmp, (unsigned int *) (unsigned long) data);
	105	break;
	106	}
	107
ea3d710f DJ	108	/*
	109	* Read 4 bytes of the other process' storage
	110	* data is a pointer specifying where the user wants the
	111	* 4 bytes copied into
	112	* addr is a pointer in the user's storage that contains an 8 byte
	113	* address in the other process of the 4 bytes that is to be read
	114	* (this is run in a 32-bit process looking at a 64-bit process)
	115	* when I and D space are separate, these will need to be fixed.
	116	*/
	117	case PTRACE_PEEKTEXT_3264:
	118	case PTRACE_PEEKDATA_3264: {
	119	u32 tmp;
	120	int copied;
	121	u32 __user * addrOthers;
	122
	123	ret = -EIO;
	124
	125	/* Get the addr in the other process that we want to read */
	126	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	127	break;
	128
	129	copied = access_process_vm(child, (u64)addrOthers, &tmp,
	130	sizeof(tmp), 0);
	131	if (copied != sizeof(tmp))
	132	break;
	133	ret = put_user(tmp, (u32 __user *) (unsigned long) data);
	134	break;
	135	}
	136
1da177e4 LT	137	/* Read the word at location addr in the USER area. */
	138	case PTRACE_PEEKUSR: {
	139	struct pt_regs *regs;
	140	unsigned int tmp;
	141
	142	regs = (struct pt_regs *) ((unsigned long) child->thread_info +
	143	THREAD_SIZE - 32 - sizeof(struct pt_regs));
	144	ret = 0; /* Default return value. */
	145
	146	switch (addr) {
	147	case 0 ... 31:
	148	tmp = regs->regs[addr];
	149	break;
	150	case FPR_BASE ... FPR_BASE + 31:
	151	if (tsk_used_math(child)) {
	152	fpureg_t *fregs = get_fpu_regs(child);
	153
	154	/*
	155	* The odd registers are actually the high
	156	* order bits of the values stored in the even
	157	* registers - unless we're using r2k_switch.S.
	158	*/
	159	if (addr & 1)
	160	tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32);
	161	else
	162	tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff);
	163	} else {
	164	tmp = -1; /* FP not yet used */
	165	}
	166	break;
	167	case PC:
	168	tmp = regs->cp0_epc;
	169	break;
	170	case CAUSE:
	171	tmp = regs->cp0_cause;
	172	break;
	173	case BADVADDR:
	174	tmp = regs->cp0_badvaddr;
	175	break;
	176	case MMHI:
	177	tmp = regs->hi;
	178	break;
	179	case MMLO:
	180	tmp = regs->lo;
	181	break;
	182	case FPC_CSR:
	183	if (cpu_has_fpu)
	184	tmp = child->thread.fpu.hard.fcr31;
	185	else
	186	tmp = child->thread.fpu.soft.fcr31;
	187	break;
	188	case FPC_EIR: { /* implementation / version register */
	189	unsigned int flags;
	190
	191	if (!cpu_has_fpu)
	192	break;
	193
	194	flags = read_c0_status();
	195	__enable_fpu();
	196	__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
	197	write_c0_status(flags);
	198	break;
	199	}
e50c0a8f RB	200	case DSP_BASE ... DSP_BASE + 5:
	201	if (!cpu_has_dsp) {
	202	tmp = 0;
	203	ret = -EIO;
	204	goto out_tsk;
	205	}
	206	if (child->thread.dsp.used_dsp) {
	207	dspreg_t *dregs = __get_dsp_regs(child);
	208	tmp = (unsigned long) (dregs[addr - DSP_BASE]);
	209	} else {
	210	tmp = -1; /* DSP registers yet used */
	211	}
	212	break;
	213	case DSP_CONTROL:
	214	if (!cpu_has_dsp) {
	215	tmp = 0;
	216	ret = -EIO;
	217	goto out_tsk;
	218	}
	219	tmp = child->thread.dsp.dspcontrol;
	220	break;
1da177e4 LT	221	default:
	222	tmp = 0;
	223	ret = -EIO;
	224	goto out_tsk;
	225	}
	226	ret = put_user(tmp, (unsigned *) (unsigned long) data);
	227	break;
	228	}
	229
	230	/* when I and D space are separate, this will have to be fixed. */
	231	case PTRACE_POKETEXT: /* write the word at location addr. */
	232	case PTRACE_POKEDATA:
	233	ret = 0;
	234	if (access_process_vm(child, addr, &data, sizeof(data), 1)
	235	== sizeof(data))
	236	break;
	237	ret = -EIO;
	238	break;
	239
ea3d710f DJ	240	/*
	241	* Write 4 bytes into the other process' storage
	242	* data is the 4 bytes that the user wants written
	243	* addr is a pointer in the user's storage that contains an
	244	* 8 byte address in the other process where the 4 bytes
	245	* that is to be written
	246	* (this is run in a 32-bit process looking at a 64-bit process)
	247	* when I and D space are separate, these will need to be fixed.
	248	*/
	249	case PTRACE_POKETEXT_3264:
	250	case PTRACE_POKEDATA_3264: {
	251	u32 __user * addrOthers;
	252
	253	/* Get the addr in the other process that we want to write into */
	254	ret = -EIO;
	255	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	256	break;
	257	ret = 0;
	258	if (access_process_vm(child, (u64)addrOthers, &data,
	259	sizeof(data), 1) == sizeof(data))
	260	break;
	261	ret = -EIO;
	262	break;
	263	}
	264
1da177e4 LT	265	case PTRACE_POKEUSR: {
	266	struct pt_regs *regs;
	267	ret = 0;
	268	regs = (struct pt_regs *) ((unsigned long) child->thread_info +
	269	THREAD_SIZE - 32 - sizeof(struct pt_regs));
	270
	271	switch (addr) {
	272	case 0 ... 31:
	273	regs->regs[addr] = data;
	274	break;
	275	case FPR_BASE ... FPR_BASE + 31: {
	276	fpureg_t *fregs = get_fpu_regs(child);
	277
	278	if (!tsk_used_math(child)) {
	279	/* FP not yet used */
	280	memset(&child->thread.fpu.hard, ~0,
	281	sizeof(child->thread.fpu.hard));
	282	child->thread.fpu.hard.fcr31 = 0;
	283	}
	284	/*
	285	* The odd registers are actually the high order bits
	286	* of the values stored in the even registers - unless
	287	* we're using r2k_switch.S.
	288	*/
	289	if (addr & 1) {
	290	fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff;
	291	fregs[(addr & ~1) - FPR_BASE] \|= ((unsigned long long) data) << 32;
	292	} else {
	293	fregs[addr - FPR_BASE] &= ~0xffffffffLL;
	294	/* Must cast, lest sign extension fill upper
	295	bits! */
	296	fregs[addr - FPR_BASE] \|= (unsigned int)data;
	297	}
	298	break;
	299	}
	300	case PC:
	301	regs->cp0_epc = data;
	302	break;
	303	case MMHI:
	304	regs->hi = data;
	305	break;
	306	case MMLO:
	307	regs->lo = data;
	308	break;
	309	case FPC_CSR:
	310	if (cpu_has_fpu)
	311	child->thread.fpu.hard.fcr31 = data;
	312	else
	313	child->thread.fpu.soft.fcr31 = data;
	314	break;
e50c0a8f RB	315	case DSP_BASE ... DSP_BASE + 5:
	316	if (!cpu_has_dsp) {
	317	ret = -EIO;
	318	break;
	319	}
	320
	321	dspreg_t *dregs = __get_dsp_regs(child);
	322	dregs[addr - DSP_BASE] = data;
	323	break;
	324	case DSP_CONTROL:
	325	if (!cpu_has_dsp) {
	326	ret = -EIO;
	327	break;
	328	}
	329	child->thread.dsp.dspcontrol = data;
	330	break;
1da177e4 LT	331	default:
	332	/* The rest are not allowed. */
	333	ret = -EIO;
	334	break;
	335	}
	336	break;
	337	}
	338
ea3d710f DJ	339	case PTRACE_GETREGS:
	340	ret = ptrace_getregs (child, (__u64 __user *) (__u64) data);
	341	break;
	342
	343	case PTRACE_SETREGS:
	344	ret = ptrace_setregs (child, (__u64 __user *) (__u64) data);
	345	break;
	346
	347	case PTRACE_GETFPREGS:
	348	ret = ptrace_getfpregs (child, (__u32 __user *) (__u64) data);
	349	break;
	350
	351	case PTRACE_SETFPREGS:
	352	ret = ptrace_setfpregs (child, (__u32 __user *) (__u64) data);
	353	break;
	354
1da177e4 LT	355	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
	356	case PTRACE_CONT: { /* restart after signal. */
	357	ret = -EIO;
7ed20e1a	358	if (!valid_signal(data))
1da177e4 LT	359	break;
	360	if (request == PTRACE_SYSCALL) {
	361	set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	362	}
	363	else {
	364	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	365	}
	366	child->exit_code = data;
	367	wake_up_process(child);
	368	ret = 0;
	369	break;
	370	}
	371
	372	/*
	373	* make the child exit. Best I can do is send it a sigkill.
	374	* perhaps it should be put in the status that it wants to
	375	* exit.
	376	*/
	377	case PTRACE_KILL:
	378	ret = 0;
	379	if (child->exit_state == EXIT_ZOMBIE) /* already dead */
	380	break;
	381	child->exit_code = SIGKILL;
	382	wake_up_process(child);
	383	break;
	384
3c37026d RB	385	case PTRACE_GET_THREAD_AREA:
	386	ret = put_user(child->thread_info->tp_value,
	387	(unsigned int __user *) (unsigned long) data);
	388	break;
	389
1da177e4 LT	390	case PTRACE_DETACH: /* detach a process that was attached. */
	391	ret = ptrace_detach(child, data);
	392	break;
	393
09276d90 RB	394	case PTRACE_GETEVENTMSG:
	395	ret = put_user(child->ptrace_message,
	396	(unsigned int __user *) (unsigned long) data);
	397	break;
	398
ea3d710f DJ	399	case PTRACE_GET_THREAD_AREA_3264:
	400	ret = put_user(child->thread_info->tp_value,
	401	(unsigned long __user *) (unsigned long) data);
	402	break;
	403
1da177e4 LT	404	default:
	405	ret = ptrace_request(child, request, addr, data);
	406	break;
	407	}
	408
	409	out_tsk:
	410	put_task_struct(child);
	411	out:
	412	unlock_kernel();
	413	return ret;
	414	}