[mirror_ubuntu-zesty-kernel.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/compat.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.
 */
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
			compat_ulong_t caddr, compat_ulong_t cdata)
{
	int addr = caddr;
	int data = cdata;
	int ret;

	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:
			tmp = child->thread.fpu.fcr31;
			break;
		case FPC_EIR: {	/* implementation / version register */
			unsigned int flags;
#ifdef CONFIG_MIPS_MT_SMTC
			unsigned int irqflags;
			unsigned int mtflags;
#endif /* CONFIG_MIPS_MT_SMTC */

			preempt_disable();
			if (!cpu_has_fpu) {
				preempt_enable();
				tmp = 0;
				break;
			}

#ifdef CONFIG_MIPS_MT_SMTC
			/* Read-modify-write of Status must be atomic */
			local_irq_save(irqflags);
			mtflags = dmt();
#endif /* CONFIG_MIPS_MT_SMTC */

			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);
			}
#ifdef CONFIG_MIPS_MT_SMTC
			emt(mtflags);
			local_irq_restore(irqflags);
#endif /* CONFIG_MIPS_MT_SMTC */
			preempt_enable();
			break;
		}
		case DSP_BASE ... DSP_BASE + 5: {
			dspreg_t *dregs;

			if (!cpu_has_dsp) {
				tmp = 0;
				ret = -EIO;
				goto out;
			}
			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;
			}
			tmp = child->thread.dsp.dspcontrol;
			break;
		default:
			tmp = 0;
			ret = -EIO;
			goto out;
		}
		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, ~0,
				       sizeof(child->thread.fpu));
				child->thread.fpu.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:
			child->thread.fpu.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, (__s64 __user *) (__u64) data);
		break;

	case PTRACE_SETREGS:
		ret = ptrace_setregs(child, (__s64 __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;

	case PTRACE_GET_WATCH_REGS:
		ret = ptrace_get_watch_regs(child,
			(struct pt_watch_regs __user *) (unsigned long) addr);
		break;

	case PTRACE_SET_WATCH_REGS:
		ret = ptrace_set_watch_regs(child,
			(struct pt_watch_regs __user *) (unsigned long) addr);
		break;

	default:
		ret = ptrace_request(child, request, addr, data);
		break;
	}
out:
	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>
5d9a76cd	18	#include <linux/compat.h>
1da177e4 LT	19	#include <linux/kernel.h>
	20	#include <linux/sched.h>
	21	#include <linux/mm.h>
	22	#include <linux/errno.h>
	23	#include <linux/ptrace.h>
	24	#include <linux/smp.h>
	25	#include <linux/smp_lock.h>
	26	#include <linux/user.h>
	27	#include <linux/security.h>
	28
	29	#include <asm/cpu.h>
e50c0a8f	30	#include <asm/dsp.h>
1da177e4 LT	31	#include <asm/fpu.h>
1da177e4 LT	32	#include <asm/mipsregs.h>
101b3531	33	#include <asm/mipsmtregs.h>
1da177e4 LT	34	#include <asm/pgtable.h>
	35	#include <asm/page.h>
	36	#include <asm/system.h>
	37	#include <asm/uaccess.h>
	38	#include <asm/bootinfo.h>
	39
49a89efb RB	40	int ptrace_getregs(struct task_struct child, __s64 __user data);
49a89efb RB	41	int ptrace_setregs(struct task_struct child, __s64 __user data);
ea3d710f	42
49a89efb RB	43	int ptrace_getfpregs(struct task_struct child, __u32 __user data);
49a89efb RB	44	int ptrace_setfpregs(struct task_struct child, __u32 __user data);
ea3d710f	45
1da177e4 LT	46	/*
	47	* Tracing a 32-bit process with a 64-bit strace and vice versa will not
	48	* work. I don't know how to fix this.
	49	*/
5d9a76cd TB	50	long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
5d9a76cd TB	51	compat_ulong_t caddr, compat_ulong_t cdata)
1da177e4	52	{
5d9a76cd TB	53	int addr = caddr;
5d9a76cd TB	54	int data = cdata;
1da177e4 LT	55	int ret;
1da177e4 LT	56
1da177e4 LT	57	switch (request) {
	58	/* when I and D space are separate, these will need to be fixed. */
	59	case PTRACE_PEEKTEXT: /* read word at location addr. */
	60	case PTRACE_PEEKDATA: {
	61	unsigned int tmp;
	62	int copied;
	63
	64	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	65	ret = -EIO;
	66	if (copied != sizeof(tmp))
	67	break;
3055acb0	68	ret = put_user(tmp, (unsigned int __user *) (unsigned long) data);
1da177e4 LT	69	break;
	70	}
	71
ea3d710f DJ	72	/*
	73	* Read 4 bytes of the other process' storage
	74	* data is a pointer specifying where the user wants the
	75	* 4 bytes copied into
	76	* addr is a pointer in the user's storage that contains an 8 byte
	77	* address in the other process of the 4 bytes that is to be read
	78	* (this is run in a 32-bit process looking at a 64-bit process)
	79	* when I and D space are separate, these will need to be fixed.
	80	*/
	81	case PTRACE_PEEKTEXT_3264:
	82	case PTRACE_PEEKDATA_3264: {
	83	u32 tmp;
	84	int copied;
	85	u32 __user * addrOthers;
	86
	87	ret = -EIO;
	88
	89	/* Get the addr in the other process that we want to read */
	90	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	91	break;
	92
	93	copied = access_process_vm(child, (u64)addrOthers, &tmp,
	94	sizeof(tmp), 0);
	95	if (copied != sizeof(tmp))
	96	break;
	97	ret = put_user(tmp, (u32 __user *) (unsigned long) data);
	98	break;
	99	}
	100
1da177e4 LT	101	/* Read the word at location addr in the USER area. */
	102	case PTRACE_PEEKUSR: {
	103	struct pt_regs *regs;
	104	unsigned int tmp;
	105
40bc9c67	106	regs = task_pt_regs(child);
1da177e4 LT	107	ret = 0; /* Default return value. */
	108
	109	switch (addr) {
	110	case 0 ... 31:
	111	tmp = regs->regs[addr];
	112	break;
	113	case FPR_BASE ... FPR_BASE + 31:
	114	if (tsk_used_math(child)) {
	115	fpureg_t *fregs = get_fpu_regs(child);
	116
	117	/*
	118	* The odd registers are actually the high
	119	* order bits of the values stored in the even
	120	* registers - unless we're using r2k_switch.S.
	121	*/
	122	if (addr & 1)
	123	tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32);
	124	else
	125	tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff);
	126	} else {
	127	tmp = -1; /* FP not yet used */
	128	}
	129	break;
	130	case PC:
	131	tmp = regs->cp0_epc;
	132	break;
	133	case CAUSE:
	134	tmp = regs->cp0_cause;
	135	break;
	136	case BADVADDR:
	137	tmp = regs->cp0_badvaddr;
	138	break;
	139	case MMHI:
	140	tmp = regs->hi;
	141	break;
	142	case MMLO:
	143	tmp = regs->lo;
	144	break;
	145	case FPC_CSR:
eae89076	146	tmp = child->thread.fpu.fcr31;
1da177e4 LT	147	break;
	148	case FPC_EIR: { /* implementation / version register */
	149	unsigned int flags;
41c594ab RB	150	#ifdef CONFIG_MIPS_MT_SMTC
	151	unsigned int irqflags;
	152	unsigned int mtflags;
	153	#endif /* CONFIG_MIPS_MT_SMTC */
1da177e4	154
e04582b7	155	preempt_disable();
3055acb0	156	if (!cpu_has_fpu) {
e04582b7	157	preempt_enable();
3055acb0	158	tmp = 0;
1da177e4	159	break;
3055acb0	160	}
1da177e4	161
41c594ab RB	162	#ifdef CONFIG_MIPS_MT_SMTC
	163	/* Read-modify-write of Status must be atomic */
	164	local_irq_save(irqflags);
	165	mtflags = dmt();
	166	#endif /* CONFIG_MIPS_MT_SMTC */
	167
101b3531 RB	168	if (cpu_has_mipsmt) {
	169	unsigned int vpflags = dvpe();
	170	flags = read_c0_status();
	171	__enable_fpu();
	172	__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
	173	write_c0_status(flags);
	174	evpe(vpflags);
	175	} else {
	176	flags = read_c0_status();
	177	__enable_fpu();
	178	__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
	179	write_c0_status(flags);
	180	}
41c594ab RB	181	#ifdef CONFIG_MIPS_MT_SMTC
	182	emt(mtflags);
	183	local_irq_restore(irqflags);
	184	#endif /* CONFIG_MIPS_MT_SMTC */
101b3531	185	preempt_enable();
1da177e4 LT	186	break;
1da177e4 LT	187	}
3055acb0 AN	188	case DSP_BASE ... DSP_BASE + 5: {
	189	dspreg_t *dregs;
	190
e50c0a8f RB	191	if (!cpu_has_dsp) {
	192	tmp = 0;
	193	ret = -EIO;
5d9a76cd	194	goto out;
e50c0a8f	195	}
3055acb0	196	dregs = __get_dsp_regs(child);
6c355852	197	tmp = (unsigned long) (dregs[addr - DSP_BASE]);
e50c0a8f	198	break;
3055acb0	199	}
e50c0a8f RB	200	case DSP_CONTROL:
	201	if (!cpu_has_dsp) {
	202	tmp = 0;
	203	ret = -EIO;
5d9a76cd	204	goto out;
e50c0a8f RB	205	}
	206	tmp = child->thread.dsp.dspcontrol;
	207	break;
1da177e4 LT	208	default:
	209	tmp = 0;
	210	ret = -EIO;
5d9a76cd	211	goto out;
1da177e4	212	}
3055acb0	213	ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
1da177e4 LT	214	break;
	215	}
	216
	217	/* when I and D space are separate, this will have to be fixed. */
	218	case PTRACE_POKETEXT: /* write the word at location addr. */
	219	case PTRACE_POKEDATA:
	220	ret = 0;
	221	if (access_process_vm(child, addr, &data, sizeof(data), 1)
	222	== sizeof(data))
	223	break;
	224	ret = -EIO;
	225	break;
	226
ea3d710f DJ	227	/*
	228	* Write 4 bytes into the other process' storage
	229	* data is the 4 bytes that the user wants written
	230	* addr is a pointer in the user's storage that contains an
	231	* 8 byte address in the other process where the 4 bytes
	232	* that is to be written
	233	* (this is run in a 32-bit process looking at a 64-bit process)
	234	* when I and D space are separate, these will need to be fixed.
	235	*/
	236	case PTRACE_POKETEXT_3264:
	237	case PTRACE_POKEDATA_3264: {
	238	u32 __user * addrOthers;
	239
	240	/* Get the addr in the other process that we want to write into */
	241	ret = -EIO;
	242	if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
	243	break;
	244	ret = 0;
	245	if (access_process_vm(child, (u64)addrOthers, &data,
	246	sizeof(data), 1) == sizeof(data))
	247	break;
	248	ret = -EIO;
	249	break;
	250	}
	251
1da177e4 LT	252	case PTRACE_POKEUSR: {
	253	struct pt_regs *regs;
	254	ret = 0;
40bc9c67	255	regs = task_pt_regs(child);
1da177e4 LT	256
	257	switch (addr) {
	258	case 0 ... 31:
	259	regs->regs[addr] = data;
	260	break;
	261	case FPR_BASE ... FPR_BASE + 31: {
	262	fpureg_t *fregs = get_fpu_regs(child);
	263
	264	if (!tsk_used_math(child)) {
	265	/* FP not yet used */
eae89076 AN	266	memset(&child->thread.fpu, ~0,
	267	sizeof(child->thread.fpu));
	268	child->thread.fpu.fcr31 = 0;
1da177e4 LT	269	}
	270	/*
	271	* The odd registers are actually the high order bits
	272	* of the values stored in the even registers - unless
	273	* we're using r2k_switch.S.
	274	*/
	275	if (addr & 1) {
	276	fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff;
	277	fregs[(addr & ~1) - FPR_BASE] \|= ((unsigned long long) data) << 32;
	278	} else {
	279	fregs[addr - FPR_BASE] &= ~0xffffffffLL;
	280	/* Must cast, lest sign extension fill upper
	281	bits! */
	282	fregs[addr - FPR_BASE] \|= (unsigned int)data;
	283	}
	284	break;
	285	}
	286	case PC:
	287	regs->cp0_epc = data;
	288	break;
	289	case MMHI:
	290	regs->hi = data;
	291	break;
	292	case MMLO:
	293	regs->lo = data;
	294	break;
	295	case FPC_CSR:
eae89076	296	child->thread.fpu.fcr31 = data;
1da177e4	297	break;
3055acb0 AN	298	case DSP_BASE ... DSP_BASE + 5: {
	299	dspreg_t *dregs;
	300
e50c0a8f RB	301	if (!cpu_has_dsp) {
	302	ret = -EIO;
	303	break;
	304	}
	305
3055acb0	306	dregs = __get_dsp_regs(child);
e50c0a8f RB	307	dregs[addr - DSP_BASE] = data;
e50c0a8f RB	308	break;
3055acb0	309	}
e50c0a8f RB	310	case DSP_CONTROL:
	311	if (!cpu_has_dsp) {
	312	ret = -EIO;
	313	break;
	314	}
	315	child->thread.dsp.dspcontrol = data;
	316	break;
1da177e4 LT	317	default:
	318	/* The rest are not allowed. */
	319	ret = -EIO;
	320	break;
	321	}
	322	break;
	323	}
	324
ea3d710f	325	case PTRACE_GETREGS:
62b14c24	326	ret = ptrace_getregs(child, (__s64 __user *) (__u64) data);
ea3d710f DJ	327	break;
	328
	329	case PTRACE_SETREGS:
62b14c24	330	ret = ptrace_setregs(child, (__s64 __user *) (__u64) data);
ea3d710f DJ	331	break;
	332
	333	case PTRACE_GETFPREGS:
49a89efb	334	ret = ptrace_getfpregs(child, (__u32 __user *) (__u64) data);
ea3d710f DJ	335	break;
	336
	337	case PTRACE_SETFPREGS:
49a89efb	338	ret = ptrace_setfpregs(child, (__u32 __user *) (__u64) data);
ea3d710f DJ	339	break;
ea3d710f DJ	340
1da177e4 LT	341	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
	342	case PTRACE_CONT: { /* restart after signal. */
	343	ret = -EIO;
7ed20e1a	344	if (!valid_signal(data))
1da177e4 LT	345	break;
	346	if (request == PTRACE_SYSCALL) {
	347	set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	348	}
	349	else {
	350	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	351	}
	352	child->exit_code = data;
	353	wake_up_process(child);
	354	ret = 0;
	355	break;
	356	}
	357
	358	/*
	359	* make the child exit. Best I can do is send it a sigkill.
	360	* perhaps it should be put in the status that it wants to
	361	* exit.
	362	*/
	363	case PTRACE_KILL:
	364	ret = 0;
	365	if (child->exit_state == EXIT_ZOMBIE) /* already dead */
	366	break;
	367	child->exit_code = SIGKILL;
	368	wake_up_process(child);
	369	break;
	370
3c37026d	371	case PTRACE_GET_THREAD_AREA:
dc8f6029	372	ret = put_user(task_thread_info(child)->tp_value,
3c37026d RB	373	(unsigned int __user *) (unsigned long) data);
	374	break;
	375
1da177e4 LT	376	case PTRACE_DETACH: /* detach a process that was attached. */
	377	ret = ptrace_detach(child, data);
	378	break;
	379
09276d90 RB	380	case PTRACE_GETEVENTMSG:
	381	ret = put_user(child->ptrace_message,
	382	(unsigned int __user *) (unsigned long) data);
	383	break;
	384
ea3d710f	385	case PTRACE_GET_THREAD_AREA_3264:
dc8f6029	386	ret = put_user(task_thread_info(child)->tp_value,
ea3d710f DJ	387	(unsigned long __user *) (unsigned long) data);
	388	break;
	389
0926bf95 DD	390	case PTRACE_GET_WATCH_REGS:
	391	ret = ptrace_get_watch_regs(child,
	392	(struct pt_watch_regs __user *) (unsigned long) addr);
	393	break;
	394
	395	case PTRACE_SET_WATCH_REGS:
	396	ret = ptrace_set_watch_regs(child,
	397	(struct pt_watch_regs __user *) (unsigned long) addr);
	398	break;
	399
1da177e4 LT	400	default:
	401	ret = ptrace_request(child, request, addr, data);
	402	break;
	403	}
1da177e4	404	out:
1da177e4 LT	405	return ret;
1da177e4 LT	406	}