[linux-2.6-block.git] / arch / ppc64 / kernel / ptrace32.c

/*
 *  linux/arch/ppc64/kernel/ptrace32.c
 *
 *  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@linuxcare.com.au).
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file README.legal 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>
#include <asm/ptrace-common.h>

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

int sys32_ptrace(long request, long pid, unsigned long addr, unsigned long data)
{
	struct task_struct *child;
	int ret = -EPERM;

	lock_kernel();
	if (request == PTRACE_TRACEME) {
		/* are we already being traced? */
		if (current->ptrace & PT_PTRACED)
			goto out;
		ret = security_ptrace(current->parent, current);
		if (ret)
			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, (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;

		if (index < PT_FPR0) {
			tmp = 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;

		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 = 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;

		if (index == PT_ORIG_R3)
			break;
		if (index < PT_FPR0) {
			ret = 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;
		/* Insure it is a register we let them change */
		if ((numReg == PT_ORIG_R3)
				|| ((numReg > PT_CCR) && (numReg < PT_FPR0)))
			break;
		if (numReg >= PT_FPR0) {
			flush_fp_to_thread(child);
		}
		if (numReg == PT_MSR)
			data = (data & MSR_DEBUGCHANGE)
				| (child->thread.regs->msr & ~MSR_DEBUGCHANGE);
		((u32*)child->thread.regs)[index] = data;
		ret = 0;
		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;
		/* make sure the single step bit is not set. */
		clear_single_step(child);
		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;
		/* make sure the single step bit is not set. */
		clear_single_step(child);
		wake_up_process(child);
		break;
	}

	case PTRACE_SINGLESTEP: {  /* set the trap flag. */
		ret = -EIO;
		if (!valid_signal(data))
			break;
		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
		set_single_step(child);
		child->exit_code = data;
		/* give it a chance to run. */
		wake_up_process(child);
		ret = 0;
		break;
	}

	case PTRACE_DETACH:
		ret = ptrace_detach(child, data);
		break;

	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;

		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;

		for (i = 0; i < 32; i++) {
			ret = get_user(*reg, tmp);
			if (ret)
				break;
			reg++;
			tmp++;
		}
		break;
	}

	case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
		int i;
		unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
		unsigned int __user *tmp = (unsigned int __user *)addr;

		flush_fp_to_thread(child);

		for (i = 0; i < 32; i++) {
			ret = put_user(*reg, tmp);
			if (ret)
				break;
			reg++;
			tmp++;
		}
		break;
	}

	case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
		int i;
		unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
		unsigned int __user *tmp = (unsigned int __user *)addr;

		flush_fp_to_thread(child);

		for (i = 0; i < 32; i++) {
			ret = get_user(*reg, tmp);
			if (ret)
				break;
			reg++;
			tmp++;
		}
		break;
	}

       case PTRACE_GETEVENTMSG:
                ret = put_user(child->ptrace_message, (unsigned int __user *) 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	* linux/arch/ppc64/kernel/ptrace32.c
	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)
	13	* and Paul Mackerras (paulus@linuxcare.com.au).
	14	*
	15	* This file is subject to the terms and conditions of the GNU General
	16	* Public License. See the file README.legal in the main directory of
	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>
	35	#include <asm/ptrace-common.h>
	36
	37	/*
	38	* does not yet catch signals sent when the child dies.
	39	* in exit.c or in signal.c.
	40	*/
	41
	42	int sys32_ptrace(long request, long pid, unsigned long addr, unsigned long data)
	43	{
	44	struct task_struct *child;
	45	int ret = -EPERM;
	46
	47	lock_kernel();
	48	if (request == PTRACE_TRACEME) {
	49	/* are we already being traced? */
	50	if (current->ptrace & PT_PTRACED)
	51	goto out;
	52	ret = security_ptrace(current->parent, current);
	53	if (ret)
	54	goto out;
	55	/* set the ptrace bit in the process flags. */
	56	current->ptrace \|= PT_PTRACED;
	57	ret = 0;
	58	goto out;
	59	}
	60	ret = -ESRCH;
	61	read_lock(&tasklist_lock);
	62	child = find_task_by_pid(pid);
	63	if (child)
	64	get_task_struct(child);
	65	read_unlock(&tasklist_lock);
	66	if (!child)
	67	goto out;
	68
	69	ret = -EPERM;
	70	if (pid == 1) /* you may not mess with init */
	71	goto out_tsk;
	72
	73	if (request == PTRACE_ATTACH) {
	74	ret = ptrace_attach(child);
	75	goto out_tsk;
	76	}
	77
	78	ret = ptrace_check_attach(child, request == PTRACE_KILL);
	79	if (ret < 0)
	80	goto out_tsk;
	81
	82	switch (request) {
	83	/* when I and D space are separate, these will need to be fixed. */
	84	case PTRACE_PEEKTEXT: /* read word at location addr. */
	85	case PTRACE_PEEKDATA: {
	86	unsigned int tmp;
	87	int copied;
	88
	89	copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
	90	ret = -EIO;
	91	if (copied != sizeof(tmp))
	92	break;
	93	ret = put_user(tmp, (u32 __user *)data);
94	break;
95	}
96
97	/*
98	* Read 4 bytes of the other process' storage
99	* data is a pointer specifying where the user wants the
100	* 4 bytes copied into
101	* addr is a pointer in the user's storage that contains an 8 byte
102	* address in the other process of the 4 bytes that is to be read
103	* (this is run in a 32-bit process looking at a 64-bit process)
104	* when I and D space are separate, these will need to be fixed.
105	*/
106	case PPC_PTRACE_PEEKTEXT_3264:
107	case PPC_PTRACE_PEEKDATA_3264: {
108	u32 tmp;
109	int copied;
110	u32 __user * addrOthers;
111
112	ret = -EIO;
113
114	/* Get the addr in the other process that we want to read */
115	if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
116	break;
117
118	copied = access_process_vm(child, (u64)addrOthers, &tmp,
119	sizeof(tmp), 0);
120	if (copied != sizeof(tmp))
121	break;
122	ret = put_user(tmp, (u32 __user *)data);
123	break;
124	}
125
126	/* Read a register (specified by ADDR) out of the "user area" */
127	case PTRACE_PEEKUSR: {
128	int index;
129	unsigned long tmp;
130
131	ret = -EIO;
132	/* convert to index and check */
133	index = (unsigned long) addr >> 2;
134	if ((addr & 3) \|\| (index > PT_FPSCR32))
135	break;
136
137	if (index < PT_FPR0) {
138	tmp = get_reg(child, index);
139	} else {
140	flush_fp_to_thread(child);
141	/*
142	* the user space code considers the floating point
143	* to be an array of unsigned int (32 bits) - the
144	* index passed in is based on this assumption.
145	*/
146	tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0];
147	}
148	ret = put_user((unsigned int)tmp, (u32 __user *)data);
149	break;
150	}
151
152	/*
153	* Read 4 bytes out of the other process' pt_regs area
154	* data is a pointer specifying where the user wants the
155	* 4 bytes copied into
156	* addr is the offset into the other process' pt_regs structure
157	* that is to be read
158	* (this is run in a 32-bit process looking at a 64-bit process)
159	*/
160	case PPC_PTRACE_PEEKUSR_3264: {
161	u32 index;
162	u32 reg32bits;
163	u64 tmp;
164	u32 numReg;
165	u32 part;
166
167	ret = -EIO;
168	/* Determine which register the user wants */
169	index = (u64)addr >> 2;
170	numReg = index / 2;
171	/* Determine which part of the register the user wants */
172	if (index % 2)
173	part = 1; /* want the 2nd half of the register (right-most). */
174	else
175	part = 0; /* want the 1st half of the register (left-most). */
176
177	/* Validate the input - check to see if address is on the wrong boundary or beyond the end of the user area */
178	if ((addr & 3) \|\| numReg > PT_FPSCR)
179	break;
180
181	if (numReg >= PT_FPR0) {
182	flush_fp_to_thread(child);
183	tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0];
184	} else { /* register within PT_REGS struct */
185	tmp = get_reg(child, numReg);
186	}
187	reg32bits = ((u32*)&tmp)[part];
188	ret = put_user(reg32bits, (u32 __user *)data);
189	break;
190	}
191
192	/* If I and D space are separate, this will have to be fixed. */
193	case PTRACE_POKETEXT: /* write the word at location addr. */
194	case PTRACE_POKEDATA: {
195	unsigned int tmp;
196	tmp = data;
197	ret = 0;
198	if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1)
199	== sizeof(tmp))
200	break;
201	ret = -EIO;
202	break;
203	}
204
205	/*
206	* Write 4 bytes into the other process' storage
207	* data is the 4 bytes that the user wants written
208	* addr is a pointer in the user's storage that contains an
209	* 8 byte address in the other process where the 4 bytes
210	* that is to be written
211	* (this is run in a 32-bit process looking at a 64-bit process)
212	* when I and D space are separate, these will need to be fixed.
213	*/
214	case PPC_PTRACE_POKETEXT_3264:
215	case PPC_PTRACE_POKEDATA_3264: {
216	u32 tmp = data;
217	u32 __user * addrOthers;
218
219	/* Get the addr in the other process that we want to write into */
220	ret = -EIO;
221	if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
222	break;
223	ret = 0;
224	if (access_process_vm(child, (u64)addrOthers, &tmp,
225	sizeof(tmp), 1) == sizeof(tmp))
226	break;
227	ret = -EIO;
228	break;
229	}
230
231	/* write the word at location addr in the USER area */
232	case PTRACE_POKEUSR: {
233	unsigned long index;
234
235	ret = -EIO;
236	/* convert to index and check */
237	index = (unsigned long) addr >> 2;
238	if ((addr & 3) \|\| (index > PT_FPSCR32))
239	break;
240
241	if (index == PT_ORIG_R3)
242	break;
243	if (index < PT_FPR0) {
244	ret = put_reg(child, index, data);
245	} else {
246	flush_fp_to_thread(child);
247	/*
248	* the user space code considers the floating point
249	* to be an array of unsigned int (32 bits) - the
250	* index passed in is based on this assumption.
251	*/
252	((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data;
253	ret = 0;
254	}
255	break;
256	}
257
258	/*
259	* Write 4 bytes into the other process' pt_regs area
260	* data is the 4 bytes that the user wants written
261	* addr is the offset into the other process' pt_regs structure
262	* that is to be written into
263	* (this is run in a 32-bit process looking at a 64-bit process)
264	*/
265	case PPC_PTRACE_POKEUSR_3264: {
266	u32 index;
267	u32 numReg;
268
269	ret = -EIO;
270	/* Determine which register the user wants */
271	index = (u64)addr >> 2;
272	numReg = index / 2;
273	/*
274	* Validate the input - check to see if address is on the
275	* wrong boundary or beyond the end of the user area
276	*/
277	if ((addr & 3) \|\| (numReg > PT_FPSCR))
278	break;
279	/* Insure it is a register we let them change */
280	if ((numReg == PT_ORIG_R3)
281	\|\| ((numReg > PT_CCR) && (numReg < PT_FPR0)))
282	break;
283	if (numReg >= PT_FPR0) {
284	flush_fp_to_thread(child);
285	}
286	if (numReg == PT_MSR)
287	data = (data & MSR_DEBUGCHANGE)
288	\| (child->thread.regs->msr & ~MSR_DEBUGCHANGE);
289	((u32*)child->thread.regs)[index] = data;
290	ret = 0;
291	break;
292	}
293
294	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
295	case PTRACE_CONT: { /* restart after signal. */
296	ret = -EIO;
7ed20e1a	297	if (!valid_signal(data))
1da177e4 LT	298	break;
	299	if (request == PTRACE_SYSCALL)
	300	set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	301	else
	302	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	303	child->exit_code = data;
	304	/* make sure the single step bit is not set. */
	305	clear_single_step(child);
	306	wake_up_process(child);
	307	ret = 0;
	308	break;
	309	}
	310
	311	/*
	312	* make the child exit. Best I can do is send it a sigkill.
	313	* perhaps it should be put in the status that it wants to
	314	* exit.
	315	*/
	316	case PTRACE_KILL: {
	317	ret = 0;
	318	if (child->exit_state == EXIT_ZOMBIE) /* already dead */
	319	break;
	320	child->exit_code = SIGKILL;
	321	/* make sure the single step bit is not set. */
	322	clear_single_step(child);
	323	wake_up_process(child);
	324	break;
	325	}
	326
	327	case PTRACE_SINGLESTEP: { /* set the trap flag. */
	328	ret = -EIO;
7ed20e1a	329	if (!valid_signal(data))
1da177e4 LT	330	break;
	331	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
	332	set_single_step(child);
	333	child->exit_code = data;
	334	/* give it a chance to run. */
	335	wake_up_process(child);
	336	ret = 0;
	337	break;
	338	}
	339
	340	case PTRACE_DETACH:
	341	ret = ptrace_detach(child, data);
	342	break;
	343
	344	case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
	345	int i;
	346	unsigned long reg = &((unsigned long )child->thread.regs)[0];
	347	unsigned int __user tmp = (unsigned int __user )addr;
	348
	349	for (i = 0; i < 32; i++) {
	350	ret = put_user(*reg, tmp);
	351	if (ret)
	352	break;
	353	reg++;
	354	tmp++;
	355	}
	356	break;
	357	}
	358
	359	case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
	360	int i;
	361	unsigned long reg = &((unsigned long )child->thread.regs)[0];
	362	unsigned int __user tmp = (unsigned int __user )addr;
	363
	364	for (i = 0; i < 32; i++) {
	365	ret = get_user(*reg, tmp);
	366	if (ret)
	367	break;
	368	reg++;
	369	tmp++;
	370	}
	371	break;
	372	}
	373
	374	case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
	375	int i;
	376	unsigned long reg = &((unsigned long )child->thread.fpr)[0];
	377	unsigned int __user tmp = (unsigned int __user )addr;
	378
	379	flush_fp_to_thread(child);
	380
	381	for (i = 0; i < 32; i++) {
	382	ret = put_user(*reg, tmp);
	383	if (ret)
	384	break;
	385	reg++;
	386	tmp++;
	387	}
	388	break;
	389	}
	390
	391	case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
	392	int i;
	393	unsigned long reg = &((unsigned long )child->thread.fpr)[0];
394	unsigned int __user tmp = (unsigned int __user )addr;
395
396	flush_fp_to_thread(child);
397
398	for (i = 0; i < 32; i++) {
399	ret = get_user(*reg, tmp);
400	if (ret)
401	break;
402	reg++;
403	tmp++;
404	}
405	break;
406	}
407
408	case PTRACE_GETEVENTMSG:
409	ret = put_user(child->ptrace_message, (unsigned int __user *) data);
410	break;
411
412	default:
413	ret = ptrace_request(child, request, addr, data);
414	break;
415	}
416	out_tsk:
417	put_task_struct(child);
418	out:
419	unlock_kernel();
420	return ret;
421	}