[net-next-2.6.git] / arch / m68knommu / kernel / process.c

/*
 *  linux/arch/m68knommu/kernel/process.c
 *
 *  Copyright (C) 1995  Hamish Macdonald
 *
 *  68060 fixes by Jesper Skov
 *
 *  uClinux changes
 *  Copyright (C) 2000-2002, David McCullough <davidm@snapgear.com>
 */

/*
 * This file handles the architecture-dependent parts of process handling..
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/fs.h>
#include <linux/slab.h>

#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/setup.h>
#include <asm/pgtable.h>

asmlinkage void ret_from_fork(void);

/*
 * The following aren't currently used.
 */
void (*pm_idle)(void);
EXPORT_SYMBOL(pm_idle);

void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);

/*
 * The idle loop on an m68knommu..
 */
static void default_idle(void)
{
	local_irq_disable();
 	while (!need_resched()) {
		/* This stop will re-enable interrupts */
 		__asm__("stop #0x2000" : : : "cc");
		local_irq_disable();
	}
	local_irq_enable();
}

void (*idle)(void) = default_idle;

/*
 * The idle thread. There's no useful work to be
 * done, so just try to conserve power and have a
 * low exit latency (ie sit in a loop waiting for
 * somebody to say that they'd like to reschedule)
 */
void cpu_idle(void)
{
	/* endless idle loop with no priority at all */
	while (1) {
		idle();
		preempt_enable_no_resched();
		schedule();
		preempt_disable();
	}
}

void machine_restart(char * __unused)
{
	if (mach_reset)
		mach_reset();
	for (;;);
}

void machine_halt(void)
{
	if (mach_halt)
		mach_halt();
	for (;;);
}

void machine_power_off(void)
{
	if (mach_power_off)
		mach_power_off();
	for (;;);
}

void show_regs(struct pt_regs * regs)
{
	printk(KERN_NOTICE "\n");
	printk(KERN_NOTICE "Format %02x  Vector: %04x  PC: %08lx  Status: %04x    %s\n",
	       regs->format, regs->vector, regs->pc, regs->sr, print_tainted());
	printk(KERN_NOTICE "ORIG_D0: %08lx  D0: %08lx  A2: %08lx  A1: %08lx\n",
	       regs->orig_d0, regs->d0, regs->a2, regs->a1);
	printk(KERN_NOTICE "A0: %08lx  D5: %08lx  D4: %08lx\n",
	       regs->a0, regs->d5, regs->d4);
	printk(KERN_NOTICE "D3: %08lx  D2: %08lx  D1: %08lx\n",
	       regs->d3, regs->d2, regs->d1);
	if (!(regs->sr & PS_S))
		printk(KERN_NOTICE "USP: %08lx\n", rdusp());
}

/*
 * Create a kernel thread
 */
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
	int retval;
	long clone_arg = flags | CLONE_VM;
	mm_segment_t fs;

	fs = get_fs();
	set_fs(KERNEL_DS);

	__asm__ __volatile__ (
			"movel	%%sp, %%d2\n\t"
			"movel	%5, %%d1\n\t"
			"movel	%1, %%d0\n\t"
			"trap	#0\n\t"
			"cmpl	%%sp, %%d2\n\t"
			"jeq	1f\n\t"
			"movel	%3, %%sp@-\n\t"
			"jsr	%4@\n\t"
			"movel	%2, %%d0\n\t"
			"trap	#0\n"
			"1:\n\t"
			"movel	%%d0, %0\n"
		: "=d" (retval)
		: "i" (__NR_clone),
		  "i" (__NR_exit),
		  "a" (arg),
		  "a" (fn),
		  "a" (clone_arg)
		: "cc", "%d0", "%d1", "%d2");

	set_fs(fs);
	return retval;
}

void flush_thread(void)
{
#ifdef CONFIG_FPU
	unsigned long zero = 0;
#endif
	set_fs(USER_DS);
	current->thread.fs = __USER_DS;
#ifdef CONFIG_FPU
	if (!FPU_IS_EMU)
		asm volatile (".chip 68k/68881\n\t"
			      "frestore %0@\n\t"
			      ".chip 68k" : : "a" (&zero));
#endif
}

/*
 * "m68k_fork()".. By the time we get here, the
 * non-volatile registers have also been saved on the
 * stack. We do some ugly pointer stuff here.. (see
 * also copy_thread)
 */

asmlinkage int m68k_fork(struct pt_regs *regs)
{
	/* fork almost works, enough to trick you into looking elsewhere :-( */
	return(-EINVAL);
}

asmlinkage int m68k_vfork(struct pt_regs *regs)
{
	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL);
}

asmlinkage int m68k_clone(struct pt_regs *regs)
{
	unsigned long clone_flags;
	unsigned long newsp;

	/* syscall2 puts clone_flags in d1 and usp in d2 */
	clone_flags = regs->d1;
	newsp = regs->d2;
	if (!newsp)
		newsp = rdusp();
        return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
}

int copy_thread(unsigned long clone_flags,
		unsigned long usp, unsigned long topstk,
		struct task_struct * p, struct pt_regs * regs)
{
	struct pt_regs * childregs;
	struct switch_stack * childstack, *stack;
	unsigned long *retp;

	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;

	*childregs = *regs;
	childregs->d0 = 0;

	retp = ((unsigned long *) regs);
	stack = ((struct switch_stack *) retp) - 1;

	childstack = ((struct switch_stack *) childregs) - 1;
	*childstack = *stack;
	childstack->retpc = (unsigned long)ret_from_fork;

	p->thread.usp = usp;
	p->thread.ksp = (unsigned long)childstack;

	if (clone_flags & CLONE_SETTLS)
		task_thread_info(p)->tp_value = regs->d5;

	/*
	 * Must save the current SFC/DFC value, NOT the value when
	 * the parent was last descheduled - RGH  10-08-96
	 */
	p->thread.fs = get_fs().seg;

#ifdef CONFIG_FPU
	if (!FPU_IS_EMU) {
		/* Copy the current fpu state */
		asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory");

		if (p->thread.fpstate[0])
		  asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t"
				"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
				: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
				: "memory");
		/* Restore the state in case the fpu was busy */
		asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
	}
#endif

	return 0;
}

/* Fill in the fpu structure for a core dump.  */

int dump_fpu(struct pt_regs *regs, struct user_m68kfp_struct *fpu)
{
#ifdef CONFIG_FPU
	char fpustate[216];

	if (FPU_IS_EMU) {
		int i;

		memcpy(fpu->fpcntl, current->thread.fpcntl, 12);
		memcpy(fpu->fpregs, current->thread.fp, 96);
		/* Convert internal fpu reg representation
		 * into long double format
		 */
		for (i = 0; i < 24; i += 3)
			fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) |
			                 ((fpu->fpregs[i] & 0x0000ffff) << 16);
		return 1;
	}

	/* First dump the fpu context to avoid protocol violation.  */
	asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
	if (!fpustate[0])
		return 0;

	asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0"
		:: "m" (fpu->fpcntl[0])
		: "memory");
	asm volatile ("fmovemx %/fp0-%/fp7,%0"
		:: "m" (fpu->fpregs[0])
		: "memory");
#endif
	return 1;
}

/*
 *	Generic dumping code. Used for panic and debug.
 */
void dump(struct pt_regs *fp)
{
	unsigned long	*sp;
	unsigned char	*tp;
	int		i;

	printk(KERN_EMERG "\nCURRENT PROCESS:\n\n");
	printk(KERN_EMERG "COMM=%s PID=%d\n", current->comm, current->pid);

	if (current->mm) {
		printk(KERN_EMERG "TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
			(int) current->mm->start_code,
			(int) current->mm->end_code,
			(int) current->mm->start_data,
			(int) current->mm->end_data,
			(int) current->mm->end_data,
			(int) current->mm->brk);
		printk(KERN_EMERG "USER-STACK=%08x KERNEL-STACK=%08x\n\n",
			(int) current->mm->start_stack,
			(int)(((unsigned long) current) + THREAD_SIZE));
	}

	printk(KERN_EMERG "PC: %08lx\n", fp->pc);
	printk(KERN_EMERG "SR: %08lx    SP: %08lx\n", (long) fp->sr, (long) fp);
	printk(KERN_EMERG "d0: %08lx    d1: %08lx    d2: %08lx    d3: %08lx\n",
		fp->d0, fp->d1, fp->d2, fp->d3);
	printk(KERN_EMERG "d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
		fp->d4, fp->d5, fp->a0, fp->a1);
	printk(KERN_EMERG "\nUSP: %08x   TRAPFRAME: %08x\n",
		(unsigned int) rdusp(), (unsigned int) fp);

	printk(KERN_EMERG "\nCODE:");
	tp = ((unsigned char *) fp->pc) - 0x20;
	for (sp = (unsigned long *) tp, i = 0; (i < 0x40);  i += 4) {
		if ((i % 0x10) == 0)
			printk(KERN_EMERG "%08x: ", (int) (tp + i));
		printk("%08x ", (int) *sp++);
	}
	printk(KERN_EMERG "\n");

	printk(KERN_EMERG "KERNEL STACK:");
	tp = ((unsigned char *) fp) - 0x40;
	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
		if ((i % 0x10) == 0)
			printk(KERN_EMERG "%08x: ", (int) (tp + i));
		printk("%08x ", (int) *sp++);
	}
	printk(KERN_EMERG "\n");

	printk(KERN_EMERG "USER STACK:");
	tp = (unsigned char *) (rdusp() - 0x10);
	for (sp = (unsigned long *) tp, i = 0; (i < 0x80); i += 4) {
		if ((i % 0x10) == 0)
			printk(KERN_EMERG "%08x: ", (int) (tp + i));
		printk("%08x ", (int) *sp++);
	}
	printk(KERN_EMERG "\n");
}

/*
 * sys_execve() executes a new program.
 */
asmlinkage int sys_execve(const char *name, char **argv, char **envp)
{
	int error;
	char * filename;
	struct pt_regs *regs = (struct pt_regs *) &name;

	filename = getname(name);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		return error;
	error = do_execve(filename, argv, envp, regs);
	putname(filename);
	return error;
}

unsigned long get_wchan(struct task_struct *p)
{
	unsigned long fp, pc;
	unsigned long stack_page;
	int count = 0;
	if (!p || p == current || p->state == TASK_RUNNING)
		return 0;

	stack_page = (unsigned long)p;
	fp = ((struct switch_stack *)p->thread.ksp)->a6;
	do {
		if (fp < stack_page+sizeof(struct thread_info) ||
		    fp >= THREAD_SIZE-8+stack_page)
			return 0;
		pc = ((unsigned long *)fp)[1];
		if (!in_sched_functions(pc))
			return pc;
		fp = *(unsigned long *) fp;
	} while (count++ < 16);
	return 0;
}

/*
 * Return saved PC of a blocked thread.
 */
unsigned long thread_saved_pc(struct task_struct *tsk)
{
	struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp;

	/* Check whether the thread is blocked in resume() */
	if (in_sched_functions(sw->retpc))
		return ((unsigned long *)sw->a6)[1];
	else
		return sw->retpc;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/m68knommu/kernel/process.c
	3	*
	4	* Copyright (C) 1995 Hamish Macdonald
	5	*
	6	* 68060 fixes by Jesper Skov
	7	*
	8	* uClinux changes
	9	* Copyright (C) 2000-2002, David McCullough <davidm@snapgear.com>
	10	*/
	11
	12	/*
	13	* This file handles the architecture-dependent parts of process handling..
	14	*/
	15
1da177e4 LT	16	#include <linux/module.h>
	17	#include <linux/errno.h>
	18	#include <linux/sched.h>
	19	#include <linux/kernel.h>
	20	#include <linux/mm.h>
	21	#include <linux/smp.h>
	22	#include <linux/smp_lock.h>
	23	#include <linux/stddef.h>
	24	#include <linux/unistd.h>
	25	#include <linux/ptrace.h>
1da177e4	26	#include <linux/user.h>
1da177e4 LT	27	#include <linux/interrupt.h>
1da177e4 LT	28	#include <linux/reboot.h>
07ef3093	29	#include <linux/fs.h>
5a0e3ad6	30	#include <linux/slab.h>
1da177e4 LT	31
	32	#include <asm/uaccess.h>
	33	#include <asm/system.h>
	34	#include <asm/traps.h>
	35	#include <asm/machdep.h>
	36	#include <asm/setup.h>
	37	#include <asm/pgtable.h>
	38
	39	asmlinkage void ret_from_fork(void);
	40
10c1f71c GU	41	/*
	42	* The following aren't currently used.
	43	*/
	44	void (*pm_idle)(void);
	45	EXPORT_SYMBOL(pm_idle);
	46
	47	void (*pm_power_off)(void);
	48	EXPORT_SYMBOL(pm_power_off);
1da177e4 LT	49
	50	/*
	51	* The idle loop on an m68knommu..
	52	*/
cdb04527	53	static void default_idle(void)
1da177e4	54	{
b05a720b GU	55	local_irq_disable();
	56	while (!need_resched()) {
	57	/* This stop will re-enable interrupts */
	58	__asm__("stop #0x2000" : : : "cc");
	59	local_irq_disable();
1da177e4	60	}
b05a720b	61	local_irq_enable();
1da177e4 LT	62	}
	63
	64	void (*idle)(void) = default_idle;
	65
	66	/*
	67	* The idle thread. There's no useful work to be
	68	* done, so just try to conserve power and have a
	69	* low exit latency (ie sit in a loop waiting for
	70	* somebody to say that they'd like to reschedule)
	71	*/
	72	void cpu_idle(void)
	73	{
	74	/* endless idle loop with no priority at all */
b05a720b GU	75	while (1) {
	76	idle();
	77	preempt_enable_no_resched();
	78	schedule();
	79	preempt_disable();
	80	}
1da177e4 LT	81	}
	82
	83	void machine_restart(char * __unused)
	84	{
	85	if (mach_reset)
	86	mach_reset();
	87	for (;;);
	88	}
	89
1da177e4 LT	90	void machine_halt(void)
	91	{
	92	if (mach_halt)
	93	mach_halt();
	94	for (;;);
	95	}
	96
1da177e4 LT	97	void machine_power_off(void)
	98	{
	99	if (mach_power_off)
	100	mach_power_off();
	101	for (;;);
	102	}
	103
1da177e4 LT	104	void show_regs(struct pt_regs * regs)
	105	{
	106	printk(KERN_NOTICE "\n");
	107	printk(KERN_NOTICE "Format %02x Vector: %04x PC: %08lx Status: %04x %s\n",
	108	regs->format, regs->vector, regs->pc, regs->sr, print_tainted());
	109	printk(KERN_NOTICE "ORIG_D0: %08lx D0: %08lx A2: %08lx A1: %08lx\n",
	110	regs->orig_d0, regs->d0, regs->a2, regs->a1);
	111	printk(KERN_NOTICE "A0: %08lx D5: %08lx D4: %08lx\n",
	112	regs->a0, regs->d5, regs->d4);
	113	printk(KERN_NOTICE "D3: %08lx D2: %08lx D1: %08lx\n",
	114	regs->d3, regs->d2, regs->d1);
	115	if (!(regs->sr & PS_S))
	116	printk(KERN_NOTICE "USP: %08lx\n", rdusp());
	117	}
	118
	119	/*
	120	* Create a kernel thread
	121	*/
	122	int kernel_thread(int (fn)(void ), void * arg, unsigned long flags)
	123	{
	124	int retval;
	125	long clone_arg = flags \| CLONE_VM;
	126	mm_segment_t fs;
	127
	128	fs = get_fs();
	129	set_fs(KERNEL_DS);
	130
	131	__asm__ __volatile__ (
	132	"movel %%sp, %%d2\n\t"
	133	"movel %5, %%d1\n\t"
	134	"movel %1, %%d0\n\t"
	135	"trap #0\n\t"
	136	"cmpl %%sp, %%d2\n\t"
	137	"jeq 1f\n\t"
	138	"movel %3, %%sp@-\n\t"
	139	"jsr %4@\n\t"
	140	"movel %2, %%d0\n\t"
	141	"trap #0\n"
	142	"1:\n\t"
	143	"movel %%d0, %0\n"
	144	: "=d" (retval)
	145	: "i" (__NR_clone),
	146	"i" (__NR_exit),
	147	"a" (arg),
	148	"a" (fn),
	149	"a" (clone_arg)
	150	: "cc", "%d0", "%d1", "%d2");
	151
	152	set_fs(fs);
	153	return retval;
	154	}
	155
	156	void flush_thread(void)
	157	{
	158	#ifdef CONFIG_FPU
	159	unsigned long zero = 0;
	160	#endif
	161	set_fs(USER_DS);
	162	current->thread.fs = __USER_DS;
	163	#ifdef CONFIG_FPU
	164	if (!FPU_IS_EMU)
	165	asm volatile (".chip 68k/68881\n\t"
	166	"frestore %0@\n\t"
	167	".chip 68k" : : "a" (&zero));
168	#endif
169	}
170
171	/*
172	* "m68k_fork()".. By the time we get here, the
173	* non-volatile registers have also been saved on the
174	* stack. We do some ugly pointer stuff here.. (see
175	* also copy_thread)
176	*/
177
178	asmlinkage int m68k_fork(struct pt_regs *regs)
179	{
180	/* fork almost works, enough to trick you into looking elsewhere :-( */
181	return(-EINVAL);
182	}
183
184	asmlinkage int m68k_vfork(struct pt_regs *regs)
185	{
186	return do_fork(CLONE_VFORK \| CLONE_VM \| SIGCHLD, rdusp(), regs, 0, NULL, NULL);
187	}
188
189	asmlinkage int m68k_clone(struct pt_regs *regs)
190	{
191	unsigned long clone_flags;
192	unsigned long newsp;
193
194	/* syscall2 puts clone_flags in d1 and usp in d2 */
195	clone_flags = regs->d1;
196	newsp = regs->d2;
197	if (!newsp)
198	newsp = rdusp();
199	return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
200	}
201
6f2c55b8	202	int copy_thread(unsigned long clone_flags,
1da177e4 LT	203	unsigned long usp, unsigned long topstk,
	204	struct task_struct * p, struct pt_regs * regs)
	205	{
	206	struct pt_regs * childregs;
	207	struct switch_stack * childstack, *stack;
513091ba	208	unsigned long *retp;
1da177e4	209
513091ba	210	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
1da177e4 LT	211
	212	childregs = regs;
	213	childregs->d0 = 0;
	214
	215	retp = ((unsigned long *) regs);
	216	stack = ((struct switch_stack *) retp) - 1;
	217
	218	childstack = ((struct switch_stack *) childregs) - 1;
	219	childstack = stack;
	220	childstack->retpc = (unsigned long)ret_from_fork;
	221
	222	p->thread.usp = usp;
	223	p->thread.ksp = (unsigned long)childstack;
a58f7534 MK	224
	225	if (clone_flags & CLONE_SETTLS)
	226	task_thread_info(p)->tp_value = regs->d5;
	227
1da177e4 LT	228	/*
	229	* Must save the current SFC/DFC value, NOT the value when
	230	* the parent was last descheduled - RGH 10-08-96
	231	*/
	232	p->thread.fs = get_fs().seg;
	233
	234	#ifdef CONFIG_FPU
	235	if (!FPU_IS_EMU) {
	236	/* Copy the current fpu state */
	237	asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory");
	238
	239	if (p->thread.fpstate[0])
	240	asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t"
	241	"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
	242	: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
	243	: "memory");
	244	/* Restore the state in case the fpu was busy */
	245	asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
	246	}
	247	#endif
	248
	249	return 0;
	250	}
	251
	252	/* Fill in the fpu structure for a core dump. */
	253
	254	int dump_fpu(struct pt_regs regs, struct user_m68kfp_struct fpu)
	255	{
	256	#ifdef CONFIG_FPU
	257	char fpustate[216];
	258
	259	if (FPU_IS_EMU) {
	260	int i;
	261
	262	memcpy(fpu->fpcntl, current->thread.fpcntl, 12);
	263	memcpy(fpu->fpregs, current->thread.fp, 96);
	264	/* Convert internal fpu reg representation
	265	* into long double format
	266	*/
	267	for (i = 0; i < 24; i += 3)
	268	fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) \|
	269	((fpu->fpregs[i] & 0x0000ffff) << 16);
	270	return 1;
	271	}
	272
	273	/* First dump the fpu context to avoid protocol violation. */
	274	asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
	275	if (!fpustate[0])
	276	return 0;
	277
	278	asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0"
	279	:: "m" (fpu->fpcntl[0])
	280	: "memory");
	281	asm volatile ("fmovemx %/fp0-%/fp7,%0"
	282	:: "m" (fpu->fpregs[0])
	283	: "memory");
	284	#endif
	285	return 1;
	286	}
	287
1da177e4 LT	288	/*
	289	* Generic dumping code. Used for panic and debug.
	290	*/
	291	void dump(struct pt_regs *fp)
	292	{
	293	unsigned long *sp;
	294	unsigned char *tp;
	295	int i;
	296
ad361c98	297	printk(KERN_EMERG "\nCURRENT PROCESS:\n\n");
1da177e4 LT	298	printk(KERN_EMERG "COMM=%s PID=%d\n", current->comm, current->pid);
	299
	300	if (current->mm) {
	301	printk(KERN_EMERG "TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
	302	(int) current->mm->start_code,
	303	(int) current->mm->end_code,
	304	(int) current->mm->start_data,
	305	(int) current->mm->end_data,
	306	(int) current->mm->end_data,
	307	(int) current->mm->brk);
ad361c98	308	printk(KERN_EMERG "USER-STACK=%08x KERNEL-STACK=%08x\n\n",
1da177e4 LT	309	(int) current->mm->start_stack,
	310	(int)(((unsigned long) current) + THREAD_SIZE));
	311	}
	312
	313	printk(KERN_EMERG "PC: %08lx\n", fp->pc);
	314	printk(KERN_EMERG "SR: %08lx SP: %08lx\n", (long) fp->sr, (long) fp);
	315	printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
	316	fp->d0, fp->d1, fp->d2, fp->d3);
	317	printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
	318	fp->d4, fp->d5, fp->a0, fp->a1);
ad361c98	319	printk(KERN_EMERG "\nUSP: %08x TRAPFRAME: %08x\n",
19127e2b	320	(unsigned int) rdusp(), (unsigned int) fp);
1da177e4	321
ad361c98	322	printk(KERN_EMERG "\nCODE:");
1da177e4 LT	323	tp = ((unsigned char *) fp->pc) - 0x20;
	324	for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
	325	if ((i % 0x10) == 0)
ad361c98	326	printk(KERN_EMERG "%08x: ", (int) (tp + i));
19127e2b	327	printk("%08x ", (int) *sp++);
1da177e4	328	}
ad361c98	329	printk(KERN_EMERG "\n");
1da177e4	330
19127e2b	331	printk(KERN_EMERG "KERNEL STACK:");
1da177e4 LT	332	tp = ((unsigned char *) fp) - 0x40;
	333	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
	334	if ((i % 0x10) == 0)
ad361c98	335	printk(KERN_EMERG "%08x: ", (int) (tp + i));
19127e2b	336	printk("%08x ", (int) *sp++);
1da177e4	337	}
ad361c98	338	printk(KERN_EMERG "\n");
1da177e4	339
19127e2b	340	printk(KERN_EMERG "USER STACK:");
1da177e4 LT	341	tp = (unsigned char *) (rdusp() - 0x10);
	342	for (sp = (unsigned long *) tp, i = 0; (i < 0x80); i += 4) {
	343	if ((i % 0x10) == 0)
ad361c98	344	printk(KERN_EMERG "%08x: ", (int) (tp + i));
19127e2b	345	printk("%08x ", (int) *sp++);
1da177e4	346	}
ad361c98	347	printk(KERN_EMERG "\n");
1da177e4 LT	348	}
	349
	350	/*
	351	* sys_execve() executes a new program.
	352	*/
c7887325	353	asmlinkage int sys_execve(const char name, char argv, char *envp)
1da177e4 LT	354	{
	355	int error;
	356	char * filename;
	357	struct pt_regs regs = (struct pt_regs ) &name;
	358
1da177e4 LT	359	filename = getname(name);
	360	error = PTR_ERR(filename);
	361	if (IS_ERR(filename))
eb7371d4	362	return error;
1da177e4 LT	363	error = do_execve(filename, argv, envp, regs);
1da177e4 LT	364	putname(filename);
1da177e4 LT	365	return error;
	366	}
	367
	368	unsigned long get_wchan(struct task_struct *p)
	369	{
	370	unsigned long fp, pc;
	371	unsigned long stack_page;
	372	int count = 0;
	373	if (!p \|\| p == current \|\| p->state == TASK_RUNNING)
	374	return 0;
	375
	376	stack_page = (unsigned long)p;
	377	fp = ((struct switch_stack *)p->thread.ksp)->a6;
	378	do {
	379	if (fp < stack_page+sizeof(struct thread_info) \|\|
45a82f51	380	fp >= THREAD_SIZE-8+stack_page)
1da177e4 LT	381	return 0;
	382	pc = ((unsigned long *)fp)[1];
	383	if (!in_sched_functions(pc))
	384	return pc;
	385	fp = (unsigned long ) fp;
	386	} while (count++ < 16);
	387	return 0;
	388	}
	389
	390	/*
	391	* Return saved PC of a blocked thread.
	392	*/
	393	unsigned long thread_saved_pc(struct task_struct *tsk)
	394	{
	395	struct switch_stack sw = (struct switch_stack )tsk->thread.ksp;
	396
	397	/* Check whether the thread is blocked in resume() */
	398	if (in_sched_functions(sw->retpc))
	399	return ((unsigned long *)sw->a6)[1];
	400	else
	401	return sw->retpc;
	402	}
	403