[linux-2.6-block.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/mipsmtregs.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();
	if (request == PTRACE_TRACEME) {
		ret = ptrace_traceme();
		goto out;
	}

	child = ptrace_get_task_struct(pid);
	if (IS_ERR(child)) {
		ret = PTR_ERR(child);
		goto out;
	}

	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 __user *) (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 = task_pt_regs(child);
		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) {
				tmp = 0;
				break;
			}

			preempt_disable();
			if (cpu_has_mipsmt) {
				unsigned int vpflags = dvpe();
				flags = read_c0_status();
				__enable_fpu();
				__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
				write_c0_status(flags);
				evpe(vpflags);
			} else {
				flags = read_c0_status();
				__enable_fpu();
				__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
				write_c0_status(flags);
			}
			preempt_enable();
			break;
		}
		case DSP_BASE ... DSP_BASE + 5: {
			dspreg_t *dregs;

			if (!cpu_has_dsp) {
				tmp = 0;
				ret = -EIO;
				goto out_tsk;
			}
			dregs = __get_dsp_regs(child);
			tmp = (unsigned long) (dregs[addr - DSP_BASE]);
			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 __user *) (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 = task_pt_regs(child);

		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: {
			dspreg_t *dregs;

			if (!cpu_has_dsp) {
				ret = -EIO;
				break;
			}

			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(task_thread_info(child)->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(task_thread_info(child)->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>
1da177e4 LT	31	#include <asm/mipsregs.h>
101b3531	32	#include <asm/mipsmtregs.h>
1da177e4 LT	33	#include <asm/pgtable.h>
	34	#include <asm/page.h>
	35	#include <asm/system.h>
	36	#include <asm/uaccess.h>
	37	#include <asm/bootinfo.h>
	38
ea3d710f DJ	39	int ptrace_getregs (struct task_struct child, __s64 __user data);
	40	int ptrace_setregs (struct task_struct child, __s64 __user data);
	41
	42	int ptrace_getfpregs (struct task_struct child, __u32 __user data);
	43	int ptrace_setfpregs (struct task_struct child, __u32 __user data);
	44
1da177e4 LT	45	/*
	46	* Tracing a 32-bit process with a 64-bit strace and vice versa will not
	47	* work. I don't know how to fix this.
	48	*/
	49	asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
	50	{
	51	struct task_struct *child;
	52	int ret;
	53
	54	#if 0
	55	printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
	56	(int) request, (int) pid, (unsigned long) addr,
	57	(unsigned long) data);
	58	#endif
	59	lock_kernel();
1da177e4	60	if (request == PTRACE_TRACEME) {
6b9c7ed8	61	ret = ptrace_traceme();
1da177e4 LT	62	goto out;
1da177e4 LT	63	}
1da177e4	64
6b9c7ed8 CH	65	child = ptrace_get_task_struct(pid);
	66	if (IS_ERR(child)) {
	67	ret = PTR_ERR(child);
	68	goto out;
	69	}
1da177e4 LT	70
	71	if (request == PTRACE_ATTACH) {
	72	ret = ptrace_attach(child);
	73	goto out_tsk;
	74	}
	75
	76	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	77	if (ret < 0)
	78	goto out_tsk;
	79
	80	switch (request) {
	81	/* when I and D space are separate, these will need to be fixed. */
	82	case PTRACE_PEEKTEXT: /* read word at location addr. */
	83	case PTRACE_PEEKDATA: {
	84	unsigned int tmp;
	85	int copied;
	86
	87	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	88	ret = -EIO;
	89	if (copied != sizeof(tmp))
	90	break;
3055acb0	91	ret = put_user(tmp, (unsigned int __user *) (unsigned long) data);
1da177e4 LT	92	break;
	93	}
	94
ea3d710f DJ	95	/*
	96	* Read 4 bytes of the other process' storage
	97	* data is a pointer specifying where the user wants the
	98	* 4 bytes copied into
	99	* addr is a pointer in the user's storage that contains an 8 byte
	100	* address in the other process of the 4 bytes that is to be read
	101	* (this is run in a 32-bit process looking at a 64-bit process)
	102	* when I and D space are separate, these will need to be fixed.
	103	*/
	104	case PTRACE_PEEKTEXT_3264:
	105	case PTRACE_PEEKDATA_3264: {
	106	u32 tmp;
	107	int copied;
	108	u32 __user * addrOthers;
	109
	110	ret = -EIO;
	111
	112	/* Get the addr in the other process that we want to read */
	113	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	114	break;
	115
	116	copied = access_process_vm(child, (u64)addrOthers, &tmp,
	117	sizeof(tmp), 0);
	118	if (copied != sizeof(tmp))
	119	break;
	120	ret = put_user(tmp, (u32 __user *) (unsigned long) data);
	121	break;
	122	}
	123
1da177e4 LT	124	/* Read the word at location addr in the USER area. */
	125	case PTRACE_PEEKUSR: {
	126	struct pt_regs *regs;
	127	unsigned int tmp;
	128
40bc9c67	129	regs = task_pt_regs(child);
1da177e4 LT	130	ret = 0; /* Default return value. */
	131
	132	switch (addr) {
	133	case 0 ... 31:
	134	tmp = regs->regs[addr];
	135	break;
	136	case FPR_BASE ... FPR_BASE + 31:
	137	if (tsk_used_math(child)) {
	138	fpureg_t *fregs = get_fpu_regs(child);
	139
	140	/*
	141	* The odd registers are actually the high
	142	* order bits of the values stored in the even
	143	* registers - unless we're using r2k_switch.S.
	144	*/
	145	if (addr & 1)
	146	tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32);
	147	else
	148	tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff);
	149	} else {
	150	tmp = -1; /* FP not yet used */
	151	}
	152	break;
	153	case PC:
	154	tmp = regs->cp0_epc;
	155	break;
	156	case CAUSE:
	157	tmp = regs->cp0_cause;
	158	break;
	159	case BADVADDR:
	160	tmp = regs->cp0_badvaddr;
	161	break;
	162	case MMHI:
	163	tmp = regs->hi;
	164	break;
	165	case MMLO:
	166	tmp = regs->lo;
	167	break;
	168	case FPC_CSR:
	169	if (cpu_has_fpu)
	170	tmp = child->thread.fpu.hard.fcr31;
	171	else
	172	tmp = child->thread.fpu.soft.fcr31;
	173	break;
	174	case FPC_EIR: { /* implementation / version register */
	175	unsigned int flags;
	176
3055acb0 AN	177	if (!cpu_has_fpu) {
3055acb0 AN	178	tmp = 0;
1da177e4	179	break;
3055acb0	180	}
1da177e4	181
101b3531 RB	182	preempt_disable();
	183	if (cpu_has_mipsmt) {
	184	unsigned int vpflags = dvpe();
	185	flags = read_c0_status();
	186	__enable_fpu();
	187	__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
	188	write_c0_status(flags);
	189	evpe(vpflags);
	190	} else {
	191	flags = read_c0_status();
	192	__enable_fpu();
	193	__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
	194	write_c0_status(flags);
	195	}
	196	preempt_enable();
1da177e4 LT	197	break;
1da177e4 LT	198	}
3055acb0 AN	199	case DSP_BASE ... DSP_BASE + 5: {
	200	dspreg_t *dregs;
	201
e50c0a8f RB	202	if (!cpu_has_dsp) {
	203	tmp = 0;
	204	ret = -EIO;
	205	goto out_tsk;
	206	}
3055acb0	207	dregs = __get_dsp_regs(child);
6c355852	208	tmp = (unsigned long) (dregs[addr - DSP_BASE]);
e50c0a8f	209	break;
3055acb0	210	}
e50c0a8f RB	211	case DSP_CONTROL:
	212	if (!cpu_has_dsp) {
	213	tmp = 0;
	214	ret = -EIO;
	215	goto out_tsk;
	216	}
	217	tmp = child->thread.dsp.dspcontrol;
	218	break;
1da177e4 LT	219	default:
	220	tmp = 0;
	221	ret = -EIO;
	222	goto out_tsk;
	223	}
3055acb0	224	ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
1da177e4 LT	225	break;
	226	}
	227
	228	/* when I and D space are separate, this will have to be fixed. */
	229	case PTRACE_POKETEXT: /* write the word at location addr. */
	230	case PTRACE_POKEDATA:
	231	ret = 0;
	232	if (access_process_vm(child, addr, &data, sizeof(data), 1)
	233	== sizeof(data))
	234	break;
	235	ret = -EIO;
	236	break;
	237
ea3d710f DJ	238	/*
	239	* Write 4 bytes into the other process' storage
	240	* data is the 4 bytes that the user wants written
	241	* addr is a pointer in the user's storage that contains an
	242	* 8 byte address in the other process where the 4 bytes
	243	* that is to be written
	244	* (this is run in a 32-bit process looking at a 64-bit process)
	245	* when I and D space are separate, these will need to be fixed.
	246	*/
	247	case PTRACE_POKETEXT_3264:
	248	case PTRACE_POKEDATA_3264: {
	249	u32 __user * addrOthers;
	250
	251	/* Get the addr in the other process that we want to write into */
	252	ret = -EIO;
	253	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	254	break;
	255	ret = 0;
	256	if (access_process_vm(child, (u64)addrOthers, &data,
	257	sizeof(data), 1) == sizeof(data))
	258	break;
	259	ret = -EIO;
	260	break;
	261	}
	262
1da177e4 LT	263	case PTRACE_POKEUSR: {
	264	struct pt_regs *regs;
	265	ret = 0;
40bc9c67	266	regs = task_pt_regs(child);
1da177e4 LT	267
	268	switch (addr) {
	269	case 0 ... 31:
	270	regs->regs[addr] = data;
	271	break;
	272	case FPR_BASE ... FPR_BASE + 31: {
	273	fpureg_t *fregs = get_fpu_regs(child);
	274
	275	if (!tsk_used_math(child)) {
	276	/* FP not yet used */
	277	memset(&child->thread.fpu.hard, ~0,
	278	sizeof(child->thread.fpu.hard));
	279	child->thread.fpu.hard.fcr31 = 0;
	280	}
	281	/*
	282	* The odd registers are actually the high order bits
	283	* of the values stored in the even registers - unless
	284	* we're using r2k_switch.S.
	285	*/
	286	if (addr & 1) {
	287	fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff;
	288	fregs[(addr & ~1) - FPR_BASE] \|= ((unsigned long long) data) << 32;
	289	} else {
	290	fregs[addr - FPR_BASE] &= ~0xffffffffLL;
	291	/* Must cast, lest sign extension fill upper
	292	bits! */
	293	fregs[addr - FPR_BASE] \|= (unsigned int)data;
	294	}
	295	break;
	296	}
	297	case PC:
	298	regs->cp0_epc = data;
	299	break;
	300	case MMHI:
	301	regs->hi = data;
	302	break;
	303	case MMLO:
	304	regs->lo = data;
	305	break;
	306	case FPC_CSR:
	307	if (cpu_has_fpu)
	308	child->thread.fpu.hard.fcr31 = data;
	309	else
	310	child->thread.fpu.soft.fcr31 = data;
	311	break;
3055acb0 AN	312	case DSP_BASE ... DSP_BASE + 5: {
	313	dspreg_t *dregs;
	314
e50c0a8f RB	315	if (!cpu_has_dsp) {
	316	ret = -EIO;
	317	break;
	318	}
	319
3055acb0	320	dregs = __get_dsp_regs(child);
e50c0a8f RB	321	dregs[addr - DSP_BASE] = data;
e50c0a8f RB	322	break;
3055acb0	323	}
e50c0a8f RB	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	385	case PTRACE_GET_THREAD_AREA:
dc8f6029	386	ret = put_user(task_thread_info(child)->tp_value,
3c37026d RB	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	399	case PTRACE_GET_THREAD_AREA_3264:
dc8f6029	400	ret = put_user(task_thread_info(child)->tp_value,
ea3d710f DJ	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	}