[deliverable/linux.git] / arch / m68k / kernel / process_no.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/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();
		schedule_preempt_disabled();
	}
}

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;
}
EXPORT_SYMBOL(kernel_thread);

void flush_thread(void)
{
#ifdef CONFIG_FPU
	unsigned long zero = 0;
#endif

	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" : : "m" (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;
}
EXPORT_SYMBOL(dump_fpu);

/*
 *	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: %p\n",
		(unsigned int) rdusp(), 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 "%p: ", 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 "%p: ", 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 "%p: ", tp + i);
		printk("%08x ", (int) *sp++);
	}
	printk(KERN_EMERG "\n");
}

/*
 * sys_execve() executes a new program.
 */
asmlinkage int sys_execve(const char *name,
			  const char *const *argv,
			  const char *const *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>
1da177e4 LT	22	#include <linux/stddef.h>
	23	#include <linux/unistd.h>
	24	#include <linux/ptrace.h>
1da177e4	25	#include <linux/user.h>
1da177e4 LT	26	#include <linux/interrupt.h>
1da177e4 LT	27	#include <linux/reboot.h>
07ef3093	28	#include <linux/fs.h>
5a0e3ad6	29	#include <linux/slab.h>
1da177e4 LT	30
	31	#include <asm/uaccess.h>
	32	#include <asm/system.h>
	33	#include <asm/traps.h>
	34	#include <asm/machdep.h>
	35	#include <asm/setup.h>
	36	#include <asm/pgtable.h>
	37
	38	asmlinkage void ret_from_fork(void);
	39
10c1f71c GU	40	/*
	41	* The following aren't currently used.
	42	*/
	43	void (*pm_idle)(void);
	44	EXPORT_SYMBOL(pm_idle);
	45
	46	void (*pm_power_off)(void);
	47	EXPORT_SYMBOL(pm_power_off);
1da177e4 LT	48
	49	/*
	50	* The idle loop on an m68knommu..
	51	*/
cdb04527	52	static void default_idle(void)
1da177e4	53	{
b05a720b GU	54	local_irq_disable();
	55	while (!need_resched()) {
	56	/* This stop will re-enable interrupts */
	57	__asm__("stop #0x2000" : : : "cc");
	58	local_irq_disable();
1da177e4	59	}
b05a720b	60	local_irq_enable();
1da177e4 LT	61	}
	62
	63	void (*idle)(void) = default_idle;
	64
	65	/*
	66	* The idle thread. There's no useful work to be
	67	* done, so just try to conserve power and have a
	68	* low exit latency (ie sit in a loop waiting for
	69	* somebody to say that they'd like to reschedule)
	70	*/
	71	void cpu_idle(void)
	72	{
	73	/* endless idle loop with no priority at all */
b05a720b GU	74	while (1) {
b05a720b GU	75	idle();
bd2f5536	76	schedule_preempt_disabled();
b05a720b	77	}
1da177e4 LT	78	}
	79
	80	void machine_restart(char * __unused)
	81	{
	82	if (mach_reset)
	83	mach_reset();
	84	for (;;);
	85	}
	86
1da177e4 LT	87	void machine_halt(void)
	88	{
	89	if (mach_halt)
	90	mach_halt();
	91	for (;;);
	92	}
	93
1da177e4 LT	94	void machine_power_off(void)
	95	{
	96	if (mach_power_off)
	97	mach_power_off();
	98	for (;;);
	99	}
	100
1da177e4 LT	101	void show_regs(struct pt_regs * regs)
	102	{
	103	printk(KERN_NOTICE "\n");
	104	printk(KERN_NOTICE "Format %02x Vector: %04x PC: %08lx Status: %04x %s\n",
	105	regs->format, regs->vector, regs->pc, regs->sr, print_tainted());
	106	printk(KERN_NOTICE "ORIG_D0: %08lx D0: %08lx A2: %08lx A1: %08lx\n",
	107	regs->orig_d0, regs->d0, regs->a2, regs->a1);
	108	printk(KERN_NOTICE "A0: %08lx D5: %08lx D4: %08lx\n",
	109	regs->a0, regs->d5, regs->d4);
	110	printk(KERN_NOTICE "D3: %08lx D2: %08lx D1: %08lx\n",
	111	regs->d3, regs->d2, regs->d1);
	112	if (!(regs->sr & PS_S))
	113	printk(KERN_NOTICE "USP: %08lx\n", rdusp());
	114	}
	115
	116	/*
	117	* Create a kernel thread
	118	*/
	119	int kernel_thread(int (fn)(void ), void * arg, unsigned long flags)
	120	{
	121	int retval;
	122	long clone_arg = flags \| CLONE_VM;
	123	mm_segment_t fs;
	124
	125	fs = get_fs();
	126	set_fs(KERNEL_DS);
	127
	128	__asm__ __volatile__ (
	129	"movel %%sp, %%d2\n\t"
	130	"movel %5, %%d1\n\t"
	131	"movel %1, %%d0\n\t"
	132	"trap #0\n\t"
	133	"cmpl %%sp, %%d2\n\t"
	134	"jeq 1f\n\t"
	135	"movel %3, %%sp@-\n\t"
	136	"jsr %4@\n\t"
	137	"movel %2, %%d0\n\t"
	138	"trap #0\n"
	139	"1:\n\t"
	140	"movel %%d0, %0\n"
	141	: "=d" (retval)
	142	: "i" (__NR_clone),
	143	"i" (__NR_exit),
	144	"a" (arg),
	145	"a" (fn),
	146	"a" (clone_arg)
	147	: "cc", "%d0", "%d1", "%d2");
	148
	149	set_fs(fs);
	150	return retval;
	151	}
dcc4d72f	152	EXPORT_SYMBOL(kernel_thread);
1da177e4 LT	153
	154	void flush_thread(void)
	155	{
	156	#ifdef CONFIG_FPU
	157	unsigned long zero = 0;
	158	#endif
b7de1100	159
1da177e4 LT	160	current->thread.fs = __USER_DS;
	161	#ifdef CONFIG_FPU
	162	if (!FPU_IS_EMU)
	163	asm volatile (".chip 68k/68881\n\t"
2a353506 AS	164	"frestore %0\n\t"
2a353506 AS	165	".chip 68k" : : "m" (zero));
1da177e4 LT	166	#endif
	167	}
	168
	169	/*
	170	* "m68k_fork()".. By the time we get here, the
	171	* non-volatile registers have also been saved on the
	172	* stack. We do some ugly pointer stuff here.. (see
	173	* also copy_thread)
	174	*/
	175
	176	asmlinkage int m68k_fork(struct pt_regs *regs)
	177	{
	178	/* fork almost works, enough to trick you into looking elsewhere :-( */
	179	return(-EINVAL);
	180	}
	181
	182	asmlinkage int m68k_vfork(struct pt_regs *regs)
	183	{
	184	return do_fork(CLONE_VFORK \| CLONE_VM \| SIGCHLD, rdusp(), regs, 0, NULL, NULL);
	185	}
	186
	187	asmlinkage int m68k_clone(struct pt_regs *regs)
	188	{
	189	unsigned long clone_flags;
	190	unsigned long newsp;
	191
	192	/* syscall2 puts clone_flags in d1 and usp in d2 */
	193	clone_flags = regs->d1;
	194	newsp = regs->d2;
	195	if (!newsp)
	196	newsp = rdusp();
	197	return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
	198	}
	199
6f2c55b8	200	int copy_thread(unsigned long clone_flags,
1da177e4 LT	201	unsigned long usp, unsigned long topstk,
	202	struct task_struct * p, struct pt_regs * regs)
	203	{
	204	struct pt_regs * childregs;
	205	struct switch_stack * childstack, *stack;
513091ba	206	unsigned long *retp;
1da177e4	207
513091ba	208	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
1da177e4 LT	209
	210	childregs = regs;
	211	childregs->d0 = 0;
	212
	213	retp = ((unsigned long *) regs);
	214	stack = ((struct switch_stack *) retp) - 1;
	215
	216	childstack = ((struct switch_stack *) childregs) - 1;
	217	childstack = stack;
	218	childstack->retpc = (unsigned long)ret_from_fork;
	219
	220	p->thread.usp = usp;
	221	p->thread.ksp = (unsigned long)childstack;
a58f7534 MK	222
	223	if (clone_flags & CLONE_SETTLS)
	224	task_thread_info(p)->tp_value = regs->d5;
	225
1da177e4 LT	226	/*
	227	* Must save the current SFC/DFC value, NOT the value when
	228	* the parent was last descheduled - RGH 10-08-96
	229	*/
	230	p->thread.fs = get_fs().seg;
	231
	232	#ifdef CONFIG_FPU
	233	if (!FPU_IS_EMU) {
	234	/* Copy the current fpu state */
	235	asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory");
	236
	237	if (p->thread.fpstate[0])
	238	asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t"
	239	"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
	240	: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
	241	: "memory");
	242	/* Restore the state in case the fpu was busy */
	243	asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
	244	}
	245	#endif
	246
	247	return 0;
	248	}
	249
	250	/* Fill in the fpu structure for a core dump. */
	251
	252	int dump_fpu(struct pt_regs regs, struct user_m68kfp_struct fpu)
	253	{
	254	#ifdef CONFIG_FPU
	255	char fpustate[216];
	256
	257	if (FPU_IS_EMU) {
	258	int i;
	259
	260	memcpy(fpu->fpcntl, current->thread.fpcntl, 12);
	261	memcpy(fpu->fpregs, current->thread.fp, 96);
	262	/* Convert internal fpu reg representation
	263	* into long double format
	264	*/
	265	for (i = 0; i < 24; i += 3)
	266	fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) \|
	267	((fpu->fpregs[i] & 0x0000ffff) << 16);
	268	return 1;
	269	}
	270
	271	/* First dump the fpu context to avoid protocol violation. */
	272	asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
	273	if (!fpustate[0])
	274	return 0;
	275
	276	asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0"
	277	:: "m" (fpu->fpcntl[0])
	278	: "memory");
	279	asm volatile ("fmovemx %/fp0-%/fp7,%0"
	280	:: "m" (fpu->fpregs[0])
	281	: "memory");
	282	#endif
	283	return 1;
	284	}
67cc09ed	285	EXPORT_SYMBOL(dump_fpu);
1da177e4	286
1da177e4 LT	287	/*
	288	* Generic dumping code. Used for panic and debug.
	289	*/
	290	void dump(struct pt_regs *fp)
	291	{
	292	unsigned long *sp;
	293	unsigned char *tp;
	294	int i;
	295
ad361c98	296	printk(KERN_EMERG "\nCURRENT PROCESS:\n\n");
1da177e4 LT	297	printk(KERN_EMERG "COMM=%s PID=%d\n", current->comm, current->pid);
	298
	299	if (current->mm) {
	300	printk(KERN_EMERG "TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
	301	(int) current->mm->start_code,
	302	(int) current->mm->end_code,
	303	(int) current->mm->start_data,
	304	(int) current->mm->end_data,
	305	(int) current->mm->end_data,
	306	(int) current->mm->brk);
ad361c98	307	printk(KERN_EMERG "USER-STACK=%08x KERNEL-STACK=%08x\n\n",
1da177e4 LT	308	(int) current->mm->start_stack,
	309	(int)(((unsigned long) current) + THREAD_SIZE));
	310	}
	311
	312	printk(KERN_EMERG "PC: %08lx\n", fp->pc);
	313	printk(KERN_EMERG "SR: %08lx SP: %08lx\n", (long) fp->sr, (long) fp);
	314	printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
	315	fp->d0, fp->d1, fp->d2, fp->d3);
	316	printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
	317	fp->d4, fp->d5, fp->a0, fp->a1);
c7484cf4 KV	318	printk(KERN_EMERG "\nUSP: %08x TRAPFRAME: %p\n",
c7484cf4 KV	319	(unsigned int) rdusp(), fp);
1da177e4	320
ad361c98	321	printk(KERN_EMERG "\nCODE:");
1da177e4 LT	322	tp = ((unsigned char *) fp->pc) - 0x20;
	323	for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
	324	if ((i % 0x10) == 0)
c7484cf4	325	printk(KERN_EMERG "%p: ", tp + i);
19127e2b	326	printk("%08x ", (int) *sp++);
1da177e4	327	}
ad361c98	328	printk(KERN_EMERG "\n");
1da177e4	329
19127e2b	330	printk(KERN_EMERG "KERNEL STACK:");
1da177e4 LT	331	tp = ((unsigned char *) fp) - 0x40;
	332	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
	333	if ((i % 0x10) == 0)
c7484cf4	334	printk(KERN_EMERG "%p: ", tp + i);
19127e2b	335	printk("%08x ", (int) *sp++);
1da177e4	336	}
ad361c98	337	printk(KERN_EMERG "\n");
1da177e4	338
19127e2b	339	printk(KERN_EMERG "USER STACK:");
1da177e4 LT	340	tp = (unsigned char *) (rdusp() - 0x10);
	341	for (sp = (unsigned long *) tp, i = 0; (i < 0x80); i += 4) {
	342	if ((i % 0x10) == 0)
c7484cf4	343	printk(KERN_EMERG "%p: ", tp + i);
19127e2b	344	printk("%08x ", (int) *sp++);
1da177e4	345	}
ad361c98	346	printk(KERN_EMERG "\n");
1da177e4 LT	347	}
	348
	349	/*
	350	* sys_execve() executes a new program.
	351	*/
d7627467 DH	352	asmlinkage int sys_execve(const char *name,
	353	const char const argv,
	354	const char const envp)
1da177e4 LT	355	{
	356	int error;
	357	char * filename;
	358	struct pt_regs regs = (struct pt_regs ) &name;
	359
1da177e4 LT	360	filename = getname(name);
	361	error = PTR_ERR(filename);
	362	if (IS_ERR(filename))
eb7371d4	363	return error;
1da177e4 LT	364	error = do_execve(filename, argv, envp, regs);
1da177e4 LT	365	putname(filename);
1da177e4 LT	366	return error;
	367	}
	368
	369	unsigned long get_wchan(struct task_struct *p)
	370	{
	371	unsigned long fp, pc;
	372	unsigned long stack_page;
	373	int count = 0;
	374	if (!p \|\| p == current \|\| p->state == TASK_RUNNING)
	375	return 0;
	376
	377	stack_page = (unsigned long)p;
	378	fp = ((struct switch_stack *)p->thread.ksp)->a6;
	379	do {
	380	if (fp < stack_page+sizeof(struct thread_info) \|\|
45a82f51	381	fp >= THREAD_SIZE-8+stack_page)
1da177e4 LT	382	return 0;
	383	pc = ((unsigned long *)fp)[1];
	384	if (!in_sched_functions(pc))
	385	return pc;
	386	fp = (unsigned long ) fp;
	387	} while (count++ < 16);
	388	return 0;
	389	}
	390
	391	/*
	392	* Return saved PC of a blocked thread.
	393	*/
	394	unsigned long thread_saved_pc(struct task_struct *tsk)
	395	{
	396	struct switch_stack sw = (struct switch_stack )tsk->thread.ksp;
	397
	398	/* Check whether the thread is blocked in resume() */
	399	if (in_sched_functions(sw->retpc))
	400	return ((unsigned long *)sw->a6)[1];
	401	else
	402	return sw->retpc;
	403	}
	404