1 /* $Id: process.c,v 1.131 2002/02/09 19:49:30 davem Exp $
2 * arch/sparc64/kernel/process.c
4 * Copyright (C) 1995, 1996 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
6 * Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
10 * This file handles the architecture-dependent parts of process handling..
15 #include <linux/config.h>
16 #include <linux/errno.h>
17 #include <linux/module.h>
18 #include <linux/sched.h>
19 #include <linux/kernel.h>
20 #include <linux/kallsyms.h>
22 #include <linux/smp.h>
23 #include <linux/smp_lock.h>
24 #include <linux/stddef.h>
25 #include <linux/ptrace.h>
26 #include <linux/slab.h>
27 #include <linux/user.h>
28 #include <linux/a.out.h>
29 #include <linux/config.h>
30 #include <linux/reboot.h>
31 #include <linux/delay.h>
32 #include <linux/compat.h>
33 #include <linux/init.h>
35 #include <asm/oplib.h>
36 #include <asm/uaccess.h>
37 #include <asm/system.h>
39 #include <asm/pgalloc.h>
40 #include <asm/pgtable.h>
41 #include <asm/processor.h>
42 #include <asm/pstate.h>
44 #include <asm/fpumacro.h>
46 #include <asm/cpudata.h>
47 #include <asm/mmu_context.h>
48 #include <asm/unistd.h>
50 /* #define VERBOSE_SHOWREGS */
53 * Nothing special yet...
55 void default_idle(void)
62 * the idle loop on a Sparc... ;)
66 /* endless idle loop with no priority at all */
68 /* If current->work.need_resched is zero we should really
69 * setup for a system wakup event and execute a shutdown
72 * But this requires writing back the contents of the
73 * L2 cache etc. so implement this later. -DaveM
75 while (!need_resched())
78 preempt_enable_no_resched();
88 * the idle loop on a UltraMultiPenguin...
90 * TIF_POLLING_NRFLAG is set because we do not sleep the cpu
91 * inside of the idler task, so an interrupt is not needed
92 * to get a clean fast response.
94 * XXX Reverify this assumption... -DaveM
96 * Addendum: We do want it to do something for the signal
97 * delivery case, we detect that by just seeing
98 * if we are trying to send this to an idler or not.
102 cpuinfo_sparc
*cpuinfo
= &local_cpu_data();
103 set_thread_flag(TIF_POLLING_NRFLAG
);
106 if (need_resched()) {
107 cpuinfo
->idle_volume
= 0;
108 preempt_enable_no_resched();
113 cpuinfo
->idle_volume
++;
115 /* The store ordering is so that IRQ handlers on
116 * other cpus see our increasing idleness for the buddy
117 * redistribution algorithm. -DaveM
119 membar_storeload_storestore();
125 extern char reboot_command
[];
127 extern void (*prom_palette
)(int);
128 extern void (*prom_keyboard
)(void);
130 void machine_halt(void)
132 if (!serial_console
&& prom_palette
)
137 panic("Halt failed!");
140 void machine_alt_power_off(void)
142 if (!serial_console
&& prom_palette
)
146 prom_halt_power_off();
147 panic("Power-off failed!");
150 void machine_restart(char * cmd
)
154 p
= strchr (reboot_command
, '\n');
156 if (!serial_console
&& prom_palette
)
163 prom_reboot(reboot_command
);
165 panic("Reboot failed!");
169 static void show_regwindow32(struct pt_regs
*regs
)
171 struct reg_window32 __user
*rw
;
172 struct reg_window32 r_w
;
175 __asm__
__volatile__ ("flushw");
176 rw
= compat_ptr((unsigned)regs
->u_regs
[14]);
179 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
185 printk("l0: %08x l1: %08x l2: %08x l3: %08x "
186 "l4: %08x l5: %08x l6: %08x l7: %08x\n",
187 r_w
.locals
[0], r_w
.locals
[1], r_w
.locals
[2], r_w
.locals
[3],
188 r_w
.locals
[4], r_w
.locals
[5], r_w
.locals
[6], r_w
.locals
[7]);
189 printk("i0: %08x i1: %08x i2: %08x i3: %08x "
190 "i4: %08x i5: %08x i6: %08x i7: %08x\n",
191 r_w
.ins
[0], r_w
.ins
[1], r_w
.ins
[2], r_w
.ins
[3],
192 r_w
.ins
[4], r_w
.ins
[5], r_w
.ins
[6], r_w
.ins
[7]);
195 #define show_regwindow32(regs) do { } while (0)
198 static void show_regwindow(struct pt_regs
*regs
)
200 struct reg_window __user
*rw
;
201 struct reg_window
*rwk
;
202 struct reg_window r_w
;
205 if ((regs
->tstate
& TSTATE_PRIV
) || !(test_thread_flag(TIF_32BIT
))) {
206 __asm__
__volatile__ ("flushw");
207 rw
= (struct reg_window __user
*)
208 (regs
->u_regs
[14] + STACK_BIAS
);
209 rwk
= (struct reg_window
*)
210 (regs
->u_regs
[14] + STACK_BIAS
);
211 if (!(regs
->tstate
& TSTATE_PRIV
)) {
214 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
222 show_regwindow32(regs
);
225 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n",
226 rwk
->locals
[0], rwk
->locals
[1], rwk
->locals
[2], rwk
->locals
[3]);
227 printk("l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
228 rwk
->locals
[4], rwk
->locals
[5], rwk
->locals
[6], rwk
->locals
[7]);
229 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n",
230 rwk
->ins
[0], rwk
->ins
[1], rwk
->ins
[2], rwk
->ins
[3]);
231 printk("i4: %016lx i5: %016lx i6: %016lx i7: %016lx\n",
232 rwk
->ins
[4], rwk
->ins
[5], rwk
->ins
[6], rwk
->ins
[7]);
233 if (regs
->tstate
& TSTATE_PRIV
)
234 print_symbol("I7: <%s>\n", rwk
->ins
[7]);
237 void show_stackframe(struct sparc_stackf
*sf
)
243 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n"
244 "l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
245 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3],
246 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
247 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n"
248 "i4: %016lx i5: %016lx fp: %016lx ret_pc: %016lx\n",
249 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3],
250 sf
->ins
[4], sf
->ins
[5], (unsigned long)sf
->fp
, sf
->callers_pc
);
251 printk("sp: %016lx x0: %016lx x1: %016lx x2: %016lx\n"
252 "x3: %016lx x4: %016lx x5: %016lx xx: %016lx\n",
253 (unsigned long)sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
254 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
256 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
257 size
-= STACKFRAME_SZ
;
258 stk
= (unsigned long *)((unsigned long)sf
+ STACKFRAME_SZ
);
261 printk("s%d: %016lx\n", i
++, *stk
++);
262 } while ((size
-= sizeof(unsigned long)));
265 void show_stackframe32(struct sparc_stackf32
*sf
)
271 printk("l0: %08x l1: %08x l2: %08x l3: %08x\n",
272 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3]);
273 printk("l4: %08x l5: %08x l6: %08x l7: %08x\n",
274 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
275 printk("i0: %08x i1: %08x i2: %08x i3: %08x\n",
276 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3]);
277 printk("i4: %08x i5: %08x fp: %08x ret_pc: %08x\n",
278 sf
->ins
[4], sf
->ins
[5], sf
->fp
, sf
->callers_pc
);
279 printk("sp: %08x x0: %08x x1: %08x x2: %08x\n"
280 "x3: %08x x4: %08x x5: %08x xx: %08x\n",
281 sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
282 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
284 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
285 size
-= STACKFRAME32_SZ
;
286 stk
= (unsigned *)((unsigned long)sf
+ STACKFRAME32_SZ
);
289 printk("s%d: %08x\n", i
++, *stk
++);
290 } while ((size
-= sizeof(unsigned)));
294 static DEFINE_SPINLOCK(regdump_lock
);
297 void __show_regs(struct pt_regs
* regs
)
302 /* Protect against xcall ipis which might lead to livelock on the lock */
303 __asm__
__volatile__("rdpr %%pstate, %0\n\t"
304 "wrpr %0, %1, %%pstate"
307 spin_lock(®dump_lock
);
309 printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x %s\n", regs
->tstate
,
310 regs
->tpc
, regs
->tnpc
, regs
->y
, print_tainted());
311 print_symbol("TPC: <%s>\n", regs
->tpc
);
312 printk("g0: %016lx g1: %016lx g2: %016lx g3: %016lx\n",
313 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
315 printk("g4: %016lx g5: %016lx g6: %016lx g7: %016lx\n",
316 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
318 printk("o0: %016lx o1: %016lx o2: %016lx o3: %016lx\n",
319 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
321 printk("o4: %016lx o5: %016lx sp: %016lx ret_pc: %016lx\n",
322 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
324 print_symbol("RPC: <%s>\n", regs
->u_regs
[15]);
325 show_regwindow(regs
);
327 spin_unlock(®dump_lock
);
328 __asm__
__volatile__("wrpr %0, 0, %%pstate"
333 #ifdef VERBOSE_SHOWREGS
334 static void idump_from_user (unsigned int *pc
)
339 if((((unsigned long) pc
) & 3))
343 for(i
= -3; i
< 6; i
++) {
345 printk("%c%08x%c",i
?' ':'<',code
,i
?' ':'>');
352 void show_regs(struct pt_regs
*regs
)
354 #ifdef VERBOSE_SHOWREGS
355 extern long etrap
, etraptl1
;
360 extern void smp_report_regs(void);
366 #ifdef VERBOSE_SHOWREGS
367 if (regs
->tpc
>= &etrap
&& regs
->tpc
< &etraptl1
&&
368 regs
->u_regs
[14] >= (long)current
- PAGE_SIZE
&&
369 regs
->u_regs
[14] < (long)current
+ 6 * PAGE_SIZE
) {
370 printk ("*********parent**********\n");
371 __show_regs((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
));
372 idump_from_user(((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
))->tpc
);
373 printk ("*********endpar**********\n");
378 void show_regs32(struct pt_regs32
*regs
)
380 printk("PSR: %08x PC: %08x NPC: %08x Y: %08x %s\n", regs
->psr
,
381 regs
->pc
, regs
->npc
, regs
->y
, print_tainted());
382 printk("g0: %08x g1: %08x g2: %08x g3: %08x ",
383 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
385 printk("g4: %08x g5: %08x g6: %08x g7: %08x\n",
386 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
388 printk("o0: %08x o1: %08x o2: %08x o3: %08x ",
389 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
391 printk("o4: %08x o5: %08x sp: %08x ret_pc: %08x\n",
392 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
396 unsigned long thread_saved_pc(struct task_struct
*tsk
)
398 struct thread_info
*ti
= task_thread_info(tsk
);
399 unsigned long ret
= 0xdeadbeefUL
;
403 sp
= (unsigned long *)(ti
->ksp
+ STACK_BIAS
);
404 if (((unsigned long)sp
& (sizeof(long) - 1)) == 0UL &&
407 fp
= (unsigned long *)(sp
[14] + STACK_BIAS
);
408 if (((unsigned long)fp
& (sizeof(long) - 1)) == 0UL)
415 /* Free current thread data structures etc.. */
416 void exit_thread(void)
418 struct thread_info
*t
= current_thread_info();
421 if (t
->utraps
[0] < 2)
427 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
428 t
->user_cntd0
= t
->user_cntd1
= NULL
;
434 void flush_thread(void)
436 struct thread_info
*t
= current_thread_info();
437 struct mm_struct
*mm
;
439 if (t
->flags
& _TIF_ABI_PENDING
)
440 t
->flags
^= (_TIF_ABI_PENDING
| _TIF_32BIT
);
444 tsb_context_switch(__pa(mm
->pgd
),
445 mm
->context
.sparc64_tsb
);
447 set_thread_wsaved(0);
449 /* Turn off performance counters if on. */
450 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
451 t
->user_cntd0
= t
->user_cntd1
= NULL
;
456 /* Clear FPU register state. */
459 if (get_thread_current_ds() != ASI_AIUS
)
462 /* Init new signal delivery disposition. */
463 clear_thread_flag(TIF_NEWSIGNALS
);
466 /* It's a bit more tricky when 64-bit tasks are involved... */
467 static unsigned long clone_stackframe(unsigned long csp
, unsigned long psp
)
469 unsigned long fp
, distance
, rval
;
471 if (!(test_thread_flag(TIF_32BIT
))) {
474 __get_user(fp
, &(((struct reg_window __user
*)psp
)->ins
[6]));
477 __get_user(fp
, &(((struct reg_window32 __user
*)psp
)->ins
[6]));
479 /* Now 8-byte align the stack as this is mandatory in the
480 * Sparc ABI due to how register windows work. This hides
481 * the restriction from thread libraries etc. -DaveM
486 rval
= (csp
- distance
);
487 if (copy_in_user((void __user
*) rval
, (void __user
*) psp
, distance
))
489 else if (test_thread_flag(TIF_32BIT
)) {
490 if (put_user(((u32
)csp
),
491 &(((struct reg_window32 __user
*)rval
)->ins
[6])))
494 if (put_user(((u64
)csp
- STACK_BIAS
),
495 &(((struct reg_window __user
*)rval
)->ins
[6])))
498 rval
= rval
- STACK_BIAS
;
504 /* Standard stuff. */
505 static inline void shift_window_buffer(int first_win
, int last_win
,
506 struct thread_info
*t
)
510 for (i
= first_win
; i
< last_win
; i
++) {
511 t
->rwbuf_stkptrs
[i
] = t
->rwbuf_stkptrs
[i
+1];
512 memcpy(&t
->reg_window
[i
], &t
->reg_window
[i
+1],
513 sizeof(struct reg_window
));
517 void synchronize_user_stack(void)
519 struct thread_info
*t
= current_thread_info();
520 unsigned long window
;
522 flush_user_windows();
523 if ((window
= get_thread_wsaved()) != 0) {
524 int winsize
= sizeof(struct reg_window
);
527 if (test_thread_flag(TIF_32BIT
))
528 winsize
= sizeof(struct reg_window32
);
534 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
535 struct reg_window
*rwin
= &t
->reg_window
[window
];
537 if (!copy_to_user((char __user
*)sp
, rwin
, winsize
)) {
538 shift_window_buffer(window
, get_thread_wsaved() - 1, t
);
539 set_thread_wsaved(get_thread_wsaved() - 1);
545 void fault_in_user_windows(void)
547 struct thread_info
*t
= current_thread_info();
548 unsigned long window
;
549 int winsize
= sizeof(struct reg_window
);
552 if (test_thread_flag(TIF_32BIT
))
553 winsize
= sizeof(struct reg_window32
);
557 flush_user_windows();
558 window
= get_thread_wsaved();
563 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
564 struct reg_window
*rwin
= &t
->reg_window
[window
];
566 if (copy_to_user((char __user
*)sp
, rwin
, winsize
))
570 set_thread_wsaved(0);
574 set_thread_wsaved(window
+ 1);
578 asmlinkage
long sparc_do_fork(unsigned long clone_flags
,
579 unsigned long stack_start
,
580 struct pt_regs
*regs
,
581 unsigned long stack_size
)
583 int __user
*parent_tid_ptr
, *child_tid_ptr
;
586 if (test_thread_flag(TIF_32BIT
)) {
587 parent_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I2
]);
588 child_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I4
]);
592 parent_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I2
];
593 child_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I4
];
596 return do_fork(clone_flags
, stack_start
,
598 parent_tid_ptr
, child_tid_ptr
);
601 /* Copy a Sparc thread. The fork() return value conventions
602 * under SunOS are nothing short of bletcherous:
603 * Parent --> %o0 == childs pid, %o1 == 0
604 * Child --> %o0 == parents pid, %o1 == 1
606 int copy_thread(int nr
, unsigned long clone_flags
, unsigned long sp
,
607 unsigned long unused
,
608 struct task_struct
*p
, struct pt_regs
*regs
)
610 struct thread_info
*t
= task_thread_info(p
);
611 char *child_trap_frame
;
613 /* Calculate offset to stack_frame & pt_regs */
614 child_trap_frame
= task_stack_page(p
) + (THREAD_SIZE
- (TRACEREG_SZ
+STACKFRAME_SZ
));
615 memcpy(child_trap_frame
, (((struct sparc_stackf
*)regs
)-1), (TRACEREG_SZ
+STACKFRAME_SZ
));
617 t
->flags
= (t
->flags
& ~((0xffUL
<< TI_FLAG_CWP_SHIFT
) | (0xffUL
<< TI_FLAG_CURRENT_DS_SHIFT
))) |
618 (((regs
->tstate
+ 1) & TSTATE_CWP
) << TI_FLAG_CWP_SHIFT
);
620 t
->ksp
= ((unsigned long) child_trap_frame
) - STACK_BIAS
;
621 t
->kregs
= (struct pt_regs
*)(child_trap_frame
+sizeof(struct sparc_stackf
));
624 if (regs
->tstate
& TSTATE_PRIV
) {
625 /* Special case, if we are spawning a kernel thread from
626 * a userspace task (via KMOD, NFS, or similar) we must
627 * disable performance counters in the child because the
628 * address space and protection realm are changing.
630 if (t
->flags
& _TIF_PERFCTR
) {
631 t
->user_cntd0
= t
->user_cntd1
= NULL
;
633 t
->flags
&= ~_TIF_PERFCTR
;
635 t
->kregs
->u_regs
[UREG_FP
] = t
->ksp
;
636 t
->flags
|= ((long)ASI_P
<< TI_FLAG_CURRENT_DS_SHIFT
);
637 flush_register_windows();
638 memcpy((void *)(t
->ksp
+ STACK_BIAS
),
639 (void *)(regs
->u_regs
[UREG_FP
] + STACK_BIAS
),
640 sizeof(struct sparc_stackf
));
641 t
->kregs
->u_regs
[UREG_G6
] = (unsigned long) t
;
642 t
->kregs
->u_regs
[UREG_G4
] = (unsigned long) t
->task
;
644 if (t
->flags
& _TIF_32BIT
) {
645 sp
&= 0x00000000ffffffffUL
;
646 regs
->u_regs
[UREG_FP
] &= 0x00000000ffffffffUL
;
648 t
->kregs
->u_regs
[UREG_FP
] = sp
;
649 t
->flags
|= ((long)ASI_AIUS
<< TI_FLAG_CURRENT_DS_SHIFT
);
650 if (sp
!= regs
->u_regs
[UREG_FP
]) {
653 csp
= clone_stackframe(sp
, regs
->u_regs
[UREG_FP
]);
656 t
->kregs
->u_regs
[UREG_FP
] = csp
;
662 /* Set the return value for the child. */
663 t
->kregs
->u_regs
[UREG_I0
] = current
->pid
;
664 t
->kregs
->u_regs
[UREG_I1
] = 1;
666 /* Set the second return value for the parent. */
667 regs
->u_regs
[UREG_I1
] = 0;
669 if (clone_flags
& CLONE_SETTLS
)
670 t
->kregs
->u_regs
[UREG_G7
] = regs
->u_regs
[UREG_I3
];
676 * This is the mechanism for creating a new kernel thread.
678 * NOTE! Only a kernel-only process(ie the swapper or direct descendants
679 * who haven't done an "execve()") should use this: it will work within
680 * a system call from a "real" process, but the process memory space will
681 * not be free'd until both the parent and the child have exited.
683 pid_t
kernel_thread(int (*fn
)(void *), void * arg
, unsigned long flags
)
687 /* If the parent runs before fn(arg) is called by the child,
688 * the input registers of this function can be clobbered.
689 * So we stash 'fn' and 'arg' into global registers which
690 * will not be modified by the parent.
692 __asm__
__volatile__("mov %4, %%g2\n\t" /* Save FN into global */
693 "mov %5, %%g3\n\t" /* Save ARG into global */
694 "mov %1, %%g1\n\t" /* Clone syscall nr. */
695 "mov %2, %%o0\n\t" /* Clone flags. */
696 "mov 0, %%o1\n\t" /* usp arg == 0 */
697 "t 0x6d\n\t" /* Linux/Sparc clone(). */
698 "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
700 "jmpl %%g2, %%o7\n\t" /* Call the function. */
701 " mov %%g3, %%o0\n\t" /* Set arg in delay. */
703 "t 0x6d\n\t" /* Linux/Sparc exit(). */
704 /* Notreached by child. */
707 "i" (__NR_clone
), "r" (flags
| CLONE_VM
| CLONE_UNTRACED
),
708 "i" (__NR_exit
), "r" (fn
), "r" (arg
) :
709 "g1", "g2", "g3", "o0", "o1", "memory", "cc");
714 * fill in the user structure for a core dump..
716 void dump_thread(struct pt_regs
* regs
, struct user
* dump
)
718 /* Only should be used for SunOS and ancient a.out
719 * SparcLinux binaries... Not worth implementing.
721 memset(dump
, 0, sizeof(struct user
));
726 unsigned int pr_regs
[32];
727 unsigned long pr_dregs
[16];
729 unsigned int __unused
;
731 unsigned char pr_qcnt
;
732 unsigned char pr_q_entrysize
;
734 unsigned int pr_q
[64];
738 * fill in the fpu structure for a core dump.
740 int dump_fpu (struct pt_regs
* regs
, elf_fpregset_t
* fpregs
)
742 unsigned long *kfpregs
= current_thread_info()->fpregs
;
743 unsigned long fprs
= current_thread_info()->fpsaved
[0];
745 if (test_thread_flag(TIF_32BIT
)) {
746 elf_fpregset_t32
*fpregs32
= (elf_fpregset_t32
*)fpregs
;
749 memcpy(&fpregs32
->pr_fr
.pr_regs
[0], kfpregs
,
750 sizeof(unsigned int) * 32);
752 memset(&fpregs32
->pr_fr
.pr_regs
[0], 0,
753 sizeof(unsigned int) * 32);
754 fpregs32
->pr_qcnt
= 0;
755 fpregs32
->pr_q_entrysize
= 8;
756 memset(&fpregs32
->pr_q
[0], 0,
757 (sizeof(unsigned int) * 64));
758 if (fprs
& FPRS_FEF
) {
759 fpregs32
->pr_fsr
= (unsigned int) current_thread_info()->xfsr
[0];
762 fpregs32
->pr_fsr
= 0;
767 memcpy(&fpregs
->pr_regs
[0], kfpregs
,
768 sizeof(unsigned int) * 32);
770 memset(&fpregs
->pr_regs
[0], 0,
771 sizeof(unsigned int) * 32);
773 memcpy(&fpregs
->pr_regs
[16], kfpregs
+16,
774 sizeof(unsigned int) * 32);
776 memset(&fpregs
->pr_regs
[16], 0,
777 sizeof(unsigned int) * 32);
778 if(fprs
& FPRS_FEF
) {
779 fpregs
->pr_fsr
= current_thread_info()->xfsr
[0];
780 fpregs
->pr_gsr
= current_thread_info()->gsr
[0];
782 fpregs
->pr_fsr
= fpregs
->pr_gsr
= 0;
784 fpregs
->pr_fprs
= fprs
;
790 * sparc_execve() executes a new program after the asm stub has set
791 * things up for us. This should basically do what I want it to.
793 asmlinkage
int sparc_execve(struct pt_regs
*regs
)
798 /* User register window flush is done by entry.S */
800 /* Check for indirect call. */
801 if (regs
->u_regs
[UREG_G1
] == 0)
804 filename
= getname((char __user
*)regs
->u_regs
[base
+ UREG_I0
]);
805 error
= PTR_ERR(filename
);
806 if (IS_ERR(filename
))
808 error
= do_execve(filename
,
809 (char __user
* __user
*)
810 regs
->u_regs
[base
+ UREG_I1
],
811 (char __user
* __user
*)
812 regs
->u_regs
[base
+ UREG_I2
], regs
);
816 current_thread_info()->xfsr
[0] = 0;
817 current_thread_info()->fpsaved
[0] = 0;
818 regs
->tstate
&= ~TSTATE_PEF
;
820 current
->ptrace
&= ~PT_DTRACE
;
821 task_unlock(current
);
827 unsigned long get_wchan(struct task_struct
*task
)
829 unsigned long pc
, fp
, bias
= 0;
830 unsigned long thread_info_base
;
831 struct reg_window
*rw
;
832 unsigned long ret
= 0;
835 if (!task
|| task
== current
||
836 task
->state
== TASK_RUNNING
)
839 thread_info_base
= (unsigned long) task_stack_page(task
);
841 fp
= task_thread_info(task
)->ksp
+ bias
;
844 /* Bogus frame pointer? */
845 if (fp
< (thread_info_base
+ sizeof(struct thread_info
)) ||
846 fp
>= (thread_info_base
+ THREAD_SIZE
))
848 rw
= (struct reg_window
*) fp
;
850 if (!in_sched_functions(pc
)) {
854 fp
= rw
->ins
[6] + bias
;
855 } while (++count
< 16);
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