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

/*
 * ptrace for 32-bit processes running on a 64-bit kernel.
 *
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Derived from "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
 *
 * Modified by Cort Dougan (cort@hq.fsmlabs.com)
 * and Paul Mackerras (paulus@samba.org).
 *
 * 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/security.h>
#include <linux/signal.h>

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

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

/*
 * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
 * we mark them as obsolete now, they will be removed in a future version
 */
static long compat_ptrace_old(struct task_struct *child, long request,
			      long addr, long data)
{
	int ret = -EPERM;

	switch(request) {
	case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
		int i;
		unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
		unsigned int __user *tmp = (unsigned int __user *)addr;

		CHECK_FULL_REGS(child->thread.regs);
		for (i = 0; i < 32; i++) {
			ret = put_user(*reg, tmp);
			if (ret)
				break;
			reg++;
			tmp++;
		}
		break;
	}

	case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
		int i;
		unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
		unsigned int __user *tmp = (unsigned int __user *)addr;

		CHECK_FULL_REGS(child->thread.regs);
		for (i = 0; i < 32; i++) {
			ret = get_user(*reg, tmp);
			if (ret)
				break;
			reg++;
			tmp++;
		}
		break;
	}

	}
	return ret;
}

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

	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, (u32 __user *)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 PPC_PTRACE_PEEKTEXT_3264:
	case PPC_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 *)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 *)data);
		break;
	}

	/* Read a register (specified by ADDR) out of the "user area" */
	case PTRACE_PEEKUSR: {
		int index;
		unsigned long tmp;

		ret = -EIO;
		/* convert to index and check */
		index = (unsigned long) addr >> 2;
		if ((addr & 3) || (index > PT_FPSCR32))
			break;

		CHECK_FULL_REGS(child->thread.regs);
		if (index < PT_FPR0) {
			tmp = ptrace_get_reg(child, index);
		} else {
			flush_fp_to_thread(child);
			/*
			 * the user space code considers the floating point
			 * to be an array of unsigned int (32 bits) - the
			 * index passed in is based on this assumption.
			 */
			tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0];
		}
		ret = put_user((unsigned int)tmp, (u32 __user *)data);
		break;
	}
  
	/*
	 * Read 4 bytes out of the other process' pt_regs area
	 *  data is a pointer specifying where the user wants the
	 *	4 bytes copied into
	 *  addr is the offset into the other process' pt_regs structure
	 *	that is to be read
	 * (this is run in a 32-bit process looking at a 64-bit process)
	 */
	case PPC_PTRACE_PEEKUSR_3264: {
		u32 index;
		u32 reg32bits;
		u64 tmp;
		u32 numReg;
		u32 part;

		ret = -EIO;
		/* Determine which register the user wants */
		index = (u64)addr >> 2;
		numReg = index / 2;
		/* Determine which part of the register the user wants */
		if (index % 2)
			part = 1;  /* want the 2nd half of the register (right-most). */
		else
			part = 0;  /* want the 1st half of the register (left-most). */

		/* Validate the input - check to see if address is on the wrong boundary
		 * or beyond the end of the user area
		 */
		if ((addr & 3) || numReg > PT_FPSCR)
			break;

		CHECK_FULL_REGS(child->thread.regs);
		if (numReg >= PT_FPR0) {
			flush_fp_to_thread(child);
			tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0];
		} else { /* register within PT_REGS struct */
			tmp = ptrace_get_reg(child, numReg);
		} 
		reg32bits = ((u32*)&tmp)[part];
		ret = put_user(reg32bits, (u32 __user *)data);
		break;
	}

	/* If I and D space are separate, this will have to be fixed. */
	case PTRACE_POKETEXT: /* write the word at location addr. */
	case PTRACE_POKEDATA: {
		unsigned int tmp;
		tmp = data;
		ret = 0;
		if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1)
				== sizeof(tmp))
			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 PPC_PTRACE_POKETEXT_3264:
	case PPC_PTRACE_POKEDATA_3264: {
		u32 tmp = data;
		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 *)addr) != 0)
			break;
		ret = 0;
		if (access_process_vm(child, (u64)addrOthers, &tmp,
					sizeof(tmp), 1) == sizeof(tmp))
			break;
		ret = -EIO;
		break;
	}

	/* write the word at location addr in the USER area */
	case PTRACE_POKEUSR: {
		unsigned long index;

		ret = -EIO;
		/* convert to index and check */
		index = (unsigned long) addr >> 2;
		if ((addr & 3) || (index > PT_FPSCR32))
			break;

		CHECK_FULL_REGS(child->thread.regs);
		if (index < PT_FPR0) {
			ret = ptrace_put_reg(child, index, data);
		} else {
			flush_fp_to_thread(child);
			/*
			 * the user space code considers the floating point
			 * to be an array of unsigned int (32 bits) - the
			 * index passed in is based on this assumption.
			 */
			((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data;
			ret = 0;
		}
		break;
	}

	/*
	 * Write 4 bytes into the other process' pt_regs area
	 *  data is the 4 bytes that the user wants written
	 *  addr is the offset into the other process' pt_regs structure
	 *	that is to be written into
	 * (this is run in a 32-bit process looking at a 64-bit process)
	 */
	case PPC_PTRACE_POKEUSR_3264: {
		u32 index;
		u32 numReg;

		ret = -EIO;
		/* Determine which register the user wants */
		index = (u64)addr >> 2;
		numReg = index / 2;

		/*
		 * Validate the input - check to see if address is on the
		 * wrong boundary or beyond the end of the user area
		 */
		if ((addr & 3) || (numReg > PT_FPSCR))
			break;
		CHECK_FULL_REGS(child->thread.regs);
		if (numReg < PT_FPR0) {
			unsigned long freg = ptrace_get_reg(child, numReg);
			if (index % 2)
				freg = (freg & ~0xfffffffful) | (data & 0xfffffffful);
			else
				freg = (freg & 0xfffffffful) | (data << 32);
			ret = ptrace_put_reg(child, numReg, freg);
		} else {
			flush_fp_to_thread(child);
			((unsigned int *)child->thread.regs)[index] = data;
			ret = 0;
		}
		break;
	}

	case PTRACE_GET_DEBUGREG: {
		ret = -EINVAL;
		/* We only support one DABR and no IABRS at the moment */
		if (addr > 0)
			break;
		ret = put_user(child->thread.dabr, (u32 __user *)data);
		break;
	}

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

	case PTRACE_GETREGS: { /* Get all pt_regs from the child. */
		int ui;
	  	if (!access_ok(VERIFY_WRITE, (void __user *)data,
			       PT_REGS_COUNT * sizeof(int))) {
			ret = -EIO;
			break;
		}
		CHECK_FULL_REGS(child->thread.regs);
		ret = 0;
		for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
			ret |= __put_user(ptrace_get_reg(child, ui),
					  (unsigned int __user *) data);
			data += sizeof(int);
		}
		break;
	}

	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
		unsigned long tmp;
		int ui;
	  	if (!access_ok(VERIFY_READ, (void __user *)data,
			       PT_REGS_COUNT * sizeof(int))) {
			ret = -EIO;
			break;
		}
		CHECK_FULL_REGS(child->thread.regs);
		ret = 0;
		for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
			ret = __get_user(tmp, (unsigned int __user *) data);
			if (ret)
				break;
			ptrace_put_reg(child, ui, tmp);
			data += sizeof(int);
		}
		break;
	}

	case PTRACE_GETFPREGS:
	case PTRACE_SETFPREGS:
	case PTRACE_GETVRREGS:
	case PTRACE_SETVRREGS:
	case PTRACE_GETREGS64:
	case PTRACE_SETREGS64:
	case PPC_PTRACE_GETFPREGS:
	case PPC_PTRACE_SETFPREGS:
	case PTRACE_KILL:
	case PTRACE_SINGLESTEP:
	case PTRACE_DETACH:
	case PTRACE_SET_DEBUGREG:
	case PTRACE_SYSCALL:
	case PTRACE_CONT:
		ret = arch_ptrace(child, request, addr, data);
		break;

	/* Old reverse args ptrace callss */
	case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
	case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
		ret = compat_ptrace_old(child, request, addr, 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	1	/*
b123923d	2	* ptrace for 32-bit processes running on a 64-bit kernel.
1da177e4 LT	3	*
	4	* PowerPC version
	5	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	6	*
	7	* Derived from "arch/m68k/kernel/ptrace.c"
	8	* Copyright (C) 1994 by Hamish Macdonald
	9	* Taken from linux/kernel/ptrace.c and modified for M680x0.
	10	* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
	11	*
	12	* Modified by Cort Dougan (cort@hq.fsmlabs.com)
b123923d	13	* and Paul Mackerras (paulus@samba.org).
1da177e4 LT	14	*
1da177e4 LT	15	* This file is subject to the terms and conditions of the GNU General
b123923d	16	* Public License. See the file COPYING in the main directory of
1da177e4 LT	17	* this archive for more details.
	18	*/
	19
	20	#include <linux/kernel.h>
	21	#include <linux/sched.h>
	22	#include <linux/mm.h>
	23	#include <linux/smp.h>
	24	#include <linux/smp_lock.h>
	25	#include <linux/errno.h>
	26	#include <linux/ptrace.h>
	27	#include <linux/user.h>
	28	#include <linux/security.h>
7ed20e1a	29	#include <linux/signal.h>
1da177e4 LT	30
	31	#include <asm/uaccess.h>
	32	#include <asm/page.h>
	33	#include <asm/pgtable.h>
	34	#include <asm/system.h>
21a62902	35
1da177e4 LT	36	/*
	37	* does not yet catch signals sent when the child dies.
	38	* in exit.c or in signal.c.
	39	*/
	40
e17666ba BH	41	/*
	42	* Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
	43	* we mark them as obsolete now, they will be removed in a future version
	44	*/
	45	static long compat_ptrace_old(struct task_struct *child, long request,
	46	long addr, long data)
	47	{
	48	int ret = -EPERM;
	49
	50	switch(request) {
	51	case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
	52	int i;
	53	unsigned long reg = &((unsigned long )child->thread.regs)[0];
	54	unsigned int __user tmp = (unsigned int __user )addr;
	55
fabca2c0	56	CHECK_FULL_REGS(child->thread.regs);
e17666ba BH	57	for (i = 0; i < 32; i++) {
	58	ret = put_user(*reg, tmp);
	59	if (ret)
	60	break;
	61	reg++;
	62	tmp++;
	63	}
	64	break;
	65	}
	66
	67	case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
	68	int i;
	69	unsigned long reg = &((unsigned long )child->thread.regs)[0];
	70	unsigned int __user tmp = (unsigned int __user )addr;
	71
fabca2c0	72	CHECK_FULL_REGS(child->thread.regs);
e17666ba BH	73	for (i = 0; i < 32; i++) {
	74	ret = get_user(*reg, tmp);
	75	if (ret)
	76	break;
	77	reg++;
	78	tmp++;
	79	}
	80	break;
	81	}
	82
	83	}
	84	return ret;
	85	}
	86
734d6524 PM	87	long compat_sys_ptrace(int request, int pid, unsigned long addr,
734d6524 PM	88	unsigned long data)
1da177e4 LT	89	{
1da177e4 LT	90	struct task_struct *child;
6b9c7ed8	91	int ret;
1da177e4 LT	92
	93	lock_kernel();
	94	if (request == PTRACE_TRACEME) {
6b9c7ed8	95	ret = ptrace_traceme();
1da177e4 LT	96	goto out;
1da177e4 LT	97	}
1da177e4	98
6b9c7ed8 CH	99	child = ptrace_get_task_struct(pid);
	100	if (IS_ERR(child)) {
	101	ret = PTR_ERR(child);
	102	goto out;
	103	}
1da177e4 LT	104
	105	if (request == PTRACE_ATTACH) {
	106	ret = ptrace_attach(child);
	107	goto out_tsk;
	108	}
	109
	110	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	111	if (ret < 0)
	112	goto out_tsk;
	113
	114	switch (request) {
	115	/* when I and D space are separate, these will need to be fixed. */
	116	case PTRACE_PEEKTEXT: /* read word at location addr. */
	117	case PTRACE_PEEKDATA: {
	118	unsigned int tmp;
	119	int copied;
	120
	121	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	122	ret = -EIO;
	123	if (copied != sizeof(tmp))
	124	break;
	125	ret = put_user(tmp, (u32 __user *)data);
	126	break;
	127	}
	128
	129	/*
	130	* Read 4 bytes of the other process' storage
	131	* data is a pointer specifying where the user wants the
	132	* 4 bytes copied into
	133	* addr is a pointer in the user's storage that contains an 8 byte
	134	* address in the other process of the 4 bytes that is to be read
	135	* (this is run in a 32-bit process looking at a 64-bit process)
	136	* when I and D space are separate, these will need to be fixed.
	137	*/
	138	case PPC_PTRACE_PEEKTEXT_3264:
	139	case PPC_PTRACE_PEEKDATA_3264: {
	140	u32 tmp;
	141	int copied;
	142	u32 __user * addrOthers;
	143
	144	ret = -EIO;
	145
	146	/* Get the addr in the other process that we want to read */
	147	if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
	148	break;
	149
	150	copied = access_process_vm(child, (u64)addrOthers, &tmp,
	151	sizeof(tmp), 0);
	152	if (copied != sizeof(tmp))
	153	break;
	154	ret = put_user(tmp, (u32 __user *)data);
	155	break;
	156	}
	157
	158	/* Read a register (specified by ADDR) out of the "user area" */
	159	case PTRACE_PEEKUSR: {
	160	int index;
	161	unsigned long tmp;
	162
	163	ret = -EIO;
	164	/* convert to index and check */
	165	index = (unsigned long) addr >> 2;
	166	if ((addr & 3) \|\| (index > PT_FPSCR32))
	167	break;
168
fabca2c0	169	CHECK_FULL_REGS(child->thread.regs);
1da177e4	170	if (index < PT_FPR0) {
865418d8	171	tmp = ptrace_get_reg(child, index);
1da177e4 LT	172	} else {
	173	flush_fp_to_thread(child);
	174	/*
	175	* the user space code considers the floating point
	176	* to be an array of unsigned int (32 bits) - the
	177	* index passed in is based on this assumption.
	178	*/
	179	tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0];
	180	}
	181	ret = put_user((unsigned int)tmp, (u32 __user *)data);
	182	break;
	183	}
	184
	185	/*
	186	* Read 4 bytes out of the other process' pt_regs area
	187	* data is a pointer specifying where the user wants the
	188	* 4 bytes copied into
	189	* addr is the offset into the other process' pt_regs structure
	190	* that is to be read
	191	* (this is run in a 32-bit process looking at a 64-bit process)
	192	*/
	193	case PPC_PTRACE_PEEKUSR_3264: {
	194	u32 index;
	195	u32 reg32bits;
	196	u64 tmp;
	197	u32 numReg;
	198	u32 part;
	199
	200	ret = -EIO;
	201	/* Determine which register the user wants */
	202	index = (u64)addr >> 2;
	203	numReg = index / 2;
	204	/* Determine which part of the register the user wants */
	205	if (index % 2)
	206	part = 1; /* want the 2nd half of the register (right-most). */
	207	else
	208	part = 0; /* want the 1st half of the register (left-most). */
	209
912000e7 BH	210	/* Validate the input - check to see if address is on the wrong boundary
	211	* or beyond the end of the user area
	212	*/
1da177e4 LT	213	if ((addr & 3) \|\| numReg > PT_FPSCR)
	214	break;
	215
fabca2c0	216	CHECK_FULL_REGS(child->thread.regs);
1da177e4 LT	217	if (numReg >= PT_FPR0) {
	218	flush_fp_to_thread(child);
	219	tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0];
	220	} else { /* register within PT_REGS struct */
865418d8	221	tmp = ptrace_get_reg(child, numReg);
1da177e4 LT	222	}
	223	reg32bits = ((u32*)&tmp)[part];
	224	ret = put_user(reg32bits, (u32 __user *)data);
	225	break;
	226	}
	227
	228	/* If 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	unsigned int tmp;
	232	tmp = data;
	233	ret = 0;
	234	if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1)
	235	== sizeof(tmp))
	236	break;
	237	ret = -EIO;
	238	break;
	239	}
	240
	241	/*
	242	* Write 4 bytes into the other process' storage
	243	* data is the 4 bytes that the user wants written
	244	* addr is a pointer in the user's storage that contains an
	245	* 8 byte address in the other process where the 4 bytes
	246	* that is to be written
	247	* (this is run in a 32-bit process looking at a 64-bit process)
	248	* when I and D space are separate, these will need to be fixed.
	249	*/
	250	case PPC_PTRACE_POKETEXT_3264:
	251	case PPC_PTRACE_POKEDATA_3264: {
	252	u32 tmp = data;
	253	u32 __user * addrOthers;
	254
	255	/* Get the addr in the other process that we want to write into */
	256	ret = -EIO;
	257	if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
	258	break;
	259	ret = 0;
	260	if (access_process_vm(child, (u64)addrOthers, &tmp,
	261	sizeof(tmp), 1) == sizeof(tmp))
	262	break;
	263	ret = -EIO;
	264	break;
	265	}
	266
	267	/* write the word at location addr in the USER area */
	268	case PTRACE_POKEUSR: {
	269	unsigned long index;
	270
	271	ret = -EIO;
	272	/* convert to index and check */
	273	index = (unsigned long) addr >> 2;
	274	if ((addr & 3) \|\| (index > PT_FPSCR32))
	275	break;
	276
fabca2c0	277	CHECK_FULL_REGS(child->thread.regs);
1da177e4	278	if (index < PT_FPR0) {
865418d8	279	ret = ptrace_put_reg(child, index, data);
1da177e4 LT	280	} else {
	281	flush_fp_to_thread(child);
	282	/*
	283	* the user space code considers the floating point
	284	* to be an array of unsigned int (32 bits) - the
	285	* index passed in is based on this assumption.
	286	*/
	287	((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data;
	288	ret = 0;
	289	}
	290	break;
	291	}
	292
	293	/*
	294	* Write 4 bytes into the other process' pt_regs area
	295	* data is the 4 bytes that the user wants written
	296	* addr is the offset into the other process' pt_regs structure
	297	* that is to be written into
	298	* (this is run in a 32-bit process looking at a 64-bit process)
	299	*/
	300	case PPC_PTRACE_POKEUSR_3264: {
	301	u32 index;
	302	u32 numReg;
	303
	304	ret = -EIO;
	305	/* Determine which register the user wants */
	306	index = (u64)addr >> 2;
	307	numReg = index / 2;
912000e7	308
1da177e4 LT	309	/*
	310	* Validate the input - check to see if address is on the
	311	* wrong boundary or beyond the end of the user area
	312	*/
	313	if ((addr & 3) \|\| (numReg > PT_FPSCR))
	314	break;
fabca2c0	315	CHECK_FULL_REGS(child->thread.regs);
912000e7 BH	316	if (numReg < PT_FPR0) {
	317	unsigned long freg = ptrace_get_reg(child, numReg);
	318	if (index % 2)
	319	freg = (freg & ~0xfffffffful) \| (data & 0xfffffffful);
	320	else
	321	freg = (freg & 0xfffffffful) \| (data << 32);
	322	ret = ptrace_put_reg(child, numReg, freg);
	323	} else {
1da177e4	324	flush_fp_to_thread(child);
912000e7 BH	325	((unsigned int *)child->thread.regs)[index] = data;
912000e7 BH	326	ret = 0;
1da177e4	327	}
1da177e4 LT	328	break;
	329	}
	330
fd9648df AB	331	case PTRACE_GET_DEBUGREG: {
	332	ret = -EINVAL;
	333	/* We only support one DABR and no IABRS at the moment */
	334	if (addr > 0)
	335	break;
	336	ret = put_user(child->thread.dabr, (u32 __user *)data);
	337	break;
	338	}
	339
e17666ba BH	340	case PTRACE_GETEVENTMSG:
e17666ba BH	341	ret = put_user(child->ptrace_message, (unsigned int __user *) data);
1da177e4 LT	342	break;
1da177e4 LT	343
e17666ba BH	344	case PTRACE_GETREGS: { /* Get all pt_regs from the child. */
	345	int ui;
	346	if (!access_ok(VERIFY_WRITE, (void __user *)data,
	347	PT_REGS_COUNT * sizeof(int))) {
	348	ret = -EIO;
	349	break;
1da177e4	350	}
fabca2c0	351	CHECK_FULL_REGS(child->thread.regs);
e17666ba BH	352	ret = 0;
e17666ba BH	353	for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
865418d8	354	ret \|= __put_user(ptrace_get_reg(child, ui),
e17666ba BH	355	(unsigned int __user *) data);
e17666ba BH	356	data += sizeof(int);
1da177e4 LT	357	}
	358	break;
	359	}
	360
e17666ba BH	361	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
	362	unsigned long tmp;
	363	int ui;
	364	if (!access_ok(VERIFY_READ, (void __user *)data,
	365	PT_REGS_COUNT * sizeof(int))) {
	366	ret = -EIO;
	367	break;
1da177e4	368	}
fabca2c0	369	CHECK_FULL_REGS(child->thread.regs);
e17666ba BH	370	ret = 0;
	371	for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
	372	ret = __get_user(tmp, (unsigned int __user *) data);
1da177e4 LT	373	if (ret)
1da177e4 LT	374	break;
865418d8	375	ptrace_put_reg(child, ui, tmp);
e17666ba	376	data += sizeof(int);
1da177e4 LT	377	}
	378	break;
	379	}
	380
e17666ba BH	381	case PTRACE_GETFPREGS:
e17666ba BH	382	case PTRACE_SETFPREGS:
962bca7f	383	case PTRACE_GETVRREGS:
e17666ba BH	384	case PTRACE_SETVRREGS:
	385	case PTRACE_GETREGS64:
	386	case PTRACE_SETREGS64:
	387	case PPC_PTRACE_GETFPREGS:
	388	case PPC_PTRACE_SETFPREGS:
	389	case PTRACE_KILL:
	390	case PTRACE_SINGLESTEP:
	391	case PTRACE_DETACH:
	392	case PTRACE_SET_DEBUGREG:
	393	case PTRACE_SYSCALL:
	394	case PTRACE_CONT:
	395	ret = arch_ptrace(child, request, addr, data);
962bca7f RJ	396	break;
962bca7f RJ	397
e17666ba BH	398	/* Old reverse args ptrace callss */
	399	case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
	400	case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
	401	ret = compat_ptrace_old(child, request, addr, data);
962bca7f	402	break;
962bca7f	403
1da177e4 LT	404	default:
	405	ret = ptrace_request(child, request, addr, data);
	406	break;
	407	}
	408	out_tsk:
	409	put_task_struct(child);
	410	out:
	411	unlock_kernel();
	412	return ret;
	413	}