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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/unistd.h>
49 /* #define VERBOSE_SHOWREGS */
52 * Nothing special yet...
54 void default_idle(void)
61 * the idle loop on a Sparc... ;)
65 if (current
->pid
!= 0)
68 /* endless idle loop with no priority at all */
70 /* If current->work.need_resched is zero we should really
71 * setup for a system wakup event and execute a shutdown
74 * But this requires writing back the contents of the
75 * L2 cache etc. so implement this later. -DaveM
77 while (!need_resched())
89 * the idle loop on a UltraMultiPenguin...
91 #define idle_me_harder() (cpu_data(smp_processor_id()).idle_volume += 1)
92 #define unidle_me() (cpu_data(smp_processor_id()).idle_volume = 0)
95 set_thread_flag(TIF_POLLING_NRFLAG
);
99 clear_thread_flag(TIF_POLLING_NRFLAG
);
101 set_thread_flag(TIF_POLLING_NRFLAG
);
106 /* The store ordering is so that IRQ handlers on
107 * other cpus see our increasing idleness for the buddy
108 * redistribution algorithm. -DaveM
110 membar("#StoreStore | #StoreLoad");
116 extern char reboot_command
[];
118 extern void (*prom_palette
)(int);
119 extern void (*prom_keyboard
)(void);
121 void machine_halt(void)
123 if (!serial_console
&& prom_palette
)
128 panic("Halt failed!");
131 EXPORT_SYMBOL(machine_halt
);
133 void machine_alt_power_off(void)
135 if (!serial_console
&& prom_palette
)
139 prom_halt_power_off();
140 panic("Power-off failed!");
143 void machine_restart(char * cmd
)
147 p
= strchr (reboot_command
, '\n');
149 if (!serial_console
&& prom_palette
)
156 prom_reboot(reboot_command
);
158 panic("Reboot failed!");
161 EXPORT_SYMBOL(machine_restart
);
163 static void show_regwindow32(struct pt_regs
*regs
)
165 struct reg_window32 __user
*rw
;
166 struct reg_window32 r_w
;
169 __asm__
__volatile__ ("flushw");
170 rw
= compat_ptr((unsigned)regs
->u_regs
[14]);
173 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
179 printk("l0: %08x l1: %08x l2: %08x l3: %08x "
180 "l4: %08x l5: %08x l6: %08x l7: %08x\n",
181 r_w
.locals
[0], r_w
.locals
[1], r_w
.locals
[2], r_w
.locals
[3],
182 r_w
.locals
[4], r_w
.locals
[5], r_w
.locals
[6], r_w
.locals
[7]);
183 printk("i0: %08x i1: %08x i2: %08x i3: %08x "
184 "i4: %08x i5: %08x i6: %08x i7: %08x\n",
185 r_w
.ins
[0], r_w
.ins
[1], r_w
.ins
[2], r_w
.ins
[3],
186 r_w
.ins
[4], r_w
.ins
[5], r_w
.ins
[6], r_w
.ins
[7]);
189 static void show_regwindow(struct pt_regs
*regs
)
191 struct reg_window __user
*rw
;
192 struct reg_window
*rwk
;
193 struct reg_window r_w
;
196 if ((regs
->tstate
& TSTATE_PRIV
) || !(test_thread_flag(TIF_32BIT
))) {
197 __asm__
__volatile__ ("flushw");
198 rw
= (struct reg_window __user
*)
199 (regs
->u_regs
[14] + STACK_BIAS
);
200 rwk
= (struct reg_window
*)
201 (regs
->u_regs
[14] + STACK_BIAS
);
202 if (!(regs
->tstate
& TSTATE_PRIV
)) {
205 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
213 show_regwindow32(regs
);
216 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n",
217 rwk
->locals
[0], rwk
->locals
[1], rwk
->locals
[2], rwk
->locals
[3]);
218 printk("l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
219 rwk
->locals
[4], rwk
->locals
[5], rwk
->locals
[6], rwk
->locals
[7]);
220 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n",
221 rwk
->ins
[0], rwk
->ins
[1], rwk
->ins
[2], rwk
->ins
[3]);
222 printk("i4: %016lx i5: %016lx i6: %016lx i7: %016lx\n",
223 rwk
->ins
[4], rwk
->ins
[5], rwk
->ins
[6], rwk
->ins
[7]);
224 if (regs
->tstate
& TSTATE_PRIV
)
225 print_symbol("I7: <%s>\n", rwk
->ins
[7]);
228 void show_stackframe(struct sparc_stackf
*sf
)
234 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n"
235 "l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
236 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3],
237 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
238 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n"
239 "i4: %016lx i5: %016lx fp: %016lx ret_pc: %016lx\n",
240 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3],
241 sf
->ins
[4], sf
->ins
[5], (unsigned long)sf
->fp
, sf
->callers_pc
);
242 printk("sp: %016lx x0: %016lx x1: %016lx x2: %016lx\n"
243 "x3: %016lx x4: %016lx x5: %016lx xx: %016lx\n",
244 (unsigned long)sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
245 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
247 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
248 size
-= STACKFRAME_SZ
;
249 stk
= (unsigned long *)((unsigned long)sf
+ STACKFRAME_SZ
);
252 printk("s%d: %016lx\n", i
++, *stk
++);
253 } while ((size
-= sizeof(unsigned long)));
256 void show_stackframe32(struct sparc_stackf32
*sf
)
262 printk("l0: %08x l1: %08x l2: %08x l3: %08x\n",
263 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3]);
264 printk("l4: %08x l5: %08x l6: %08x l7: %08x\n",
265 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
266 printk("i0: %08x i1: %08x i2: %08x i3: %08x\n",
267 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3]);
268 printk("i4: %08x i5: %08x fp: %08x ret_pc: %08x\n",
269 sf
->ins
[4], sf
->ins
[5], sf
->fp
, sf
->callers_pc
);
270 printk("sp: %08x x0: %08x x1: %08x x2: %08x\n"
271 "x3: %08x x4: %08x x5: %08x xx: %08x\n",
272 sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
273 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
275 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
276 size
-= STACKFRAME32_SZ
;
277 stk
= (unsigned *)((unsigned long)sf
+ STACKFRAME32_SZ
);
280 printk("s%d: %08x\n", i
++, *stk
++);
281 } while ((size
-= sizeof(unsigned)));
285 static DEFINE_SPINLOCK(regdump_lock
);
288 void __show_regs(struct pt_regs
* regs
)
293 /* Protect against xcall ipis which might lead to livelock on the lock */
294 __asm__
__volatile__("rdpr %%pstate, %0\n\t"
295 "wrpr %0, %1, %%pstate"
298 spin_lock(®dump_lock
);
300 printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x %s\n", regs
->tstate
,
301 regs
->tpc
, regs
->tnpc
, regs
->y
, print_tainted());
302 print_symbol("TPC: <%s>\n", regs
->tpc
);
303 printk("g0: %016lx g1: %016lx g2: %016lx g3: %016lx\n",
304 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
306 printk("g4: %016lx g5: %016lx g6: %016lx g7: %016lx\n",
307 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
309 printk("o0: %016lx o1: %016lx o2: %016lx o3: %016lx\n",
310 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
312 printk("o4: %016lx o5: %016lx sp: %016lx ret_pc: %016lx\n",
313 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
315 print_symbol("RPC: <%s>\n", regs
->u_regs
[15]);
316 show_regwindow(regs
);
318 spin_unlock(®dump_lock
);
319 __asm__
__volatile__("wrpr %0, 0, %%pstate"
324 #ifdef VERBOSE_SHOWREGS
325 static void idump_from_user (unsigned int *pc
)
330 if((((unsigned long) pc
) & 3))
334 for(i
= -3; i
< 6; i
++) {
336 printk("%c%08x%c",i
?' ':'<',code
,i
?' ':'>');
343 void show_regs(struct pt_regs
*regs
)
345 #ifdef VERBOSE_SHOWREGS
346 extern long etrap
, etraptl1
;
351 extern void smp_report_regs(void);
357 #ifdef VERBOSE_SHOWREGS
358 if (regs
->tpc
>= &etrap
&& regs
->tpc
< &etraptl1
&&
359 regs
->u_regs
[14] >= (long)current
- PAGE_SIZE
&&
360 regs
->u_regs
[14] < (long)current
+ 6 * PAGE_SIZE
) {
361 printk ("*********parent**********\n");
362 __show_regs((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
));
363 idump_from_user(((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
))->tpc
);
364 printk ("*********endpar**********\n");
369 void show_regs32(struct pt_regs32
*regs
)
371 printk("PSR: %08x PC: %08x NPC: %08x Y: %08x %s\n", regs
->psr
,
372 regs
->pc
, regs
->npc
, regs
->y
, print_tainted());
373 printk("g0: %08x g1: %08x g2: %08x g3: %08x ",
374 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
376 printk("g4: %08x g5: %08x g6: %08x g7: %08x\n",
377 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
379 printk("o0: %08x o1: %08x o2: %08x o3: %08x ",
380 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
382 printk("o4: %08x o5: %08x sp: %08x ret_pc: %08x\n",
383 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
387 unsigned long thread_saved_pc(struct task_struct
*tsk
)
389 struct thread_info
*ti
= tsk
->thread_info
;
390 unsigned long ret
= 0xdeadbeefUL
;
394 sp
= (unsigned long *)(ti
->ksp
+ STACK_BIAS
);
395 if (((unsigned long)sp
& (sizeof(long) - 1)) == 0UL &&
398 fp
= (unsigned long *)(sp
[14] + STACK_BIAS
);
399 if (((unsigned long)fp
& (sizeof(long) - 1)) == 0UL)
406 /* Free current thread data structures etc.. */
407 void exit_thread(void)
409 struct thread_info
*t
= current_thread_info();
412 if (t
->utraps
[0] < 2)
418 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
419 t
->user_cntd0
= t
->user_cntd1
= NULL
;
425 void flush_thread(void)
427 struct thread_info
*t
= current_thread_info();
429 if (t
->flags
& _TIF_ABI_PENDING
)
430 t
->flags
^= (_TIF_ABI_PENDING
| _TIF_32BIT
);
433 unsigned long pgd_cache
= 0UL;
434 if (test_thread_flag(TIF_32BIT
)) {
435 struct mm_struct
*mm
= t
->task
->mm
;
436 pgd_t
*pgd0
= &mm
->pgd
[0];
437 pud_t
*pud0
= pud_offset(pgd0
, 0);
439 if (pud_none(*pud0
)) {
440 pmd_t
*page
= pmd_alloc_one(mm
, 0);
443 pgd_cache
= get_pgd_cache(pgd0
);
445 __asm__
__volatile__("stxa %0, [%1] %2\n\t"
452 set_thread_wsaved(0);
454 /* Turn off performance counters if on. */
455 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
456 t
->user_cntd0
= t
->user_cntd1
= NULL
;
461 /* Clear FPU register state. */
464 if (get_thread_current_ds() != ASI_AIUS
)
467 /* Init new signal delivery disposition. */
468 clear_thread_flag(TIF_NEWSIGNALS
);
471 /* It's a bit more tricky when 64-bit tasks are involved... */
472 static unsigned long clone_stackframe(unsigned long csp
, unsigned long psp
)
474 unsigned long fp
, distance
, rval
;
476 if (!(test_thread_flag(TIF_32BIT
))) {
479 __get_user(fp
, &(((struct reg_window __user
*)psp
)->ins
[6]));
482 __get_user(fp
, &(((struct reg_window32 __user
*)psp
)->ins
[6]));
484 /* Now 8-byte align the stack as this is mandatory in the
485 * Sparc ABI due to how register windows work. This hides
486 * the restriction from thread libraries etc. -DaveM
491 rval
= (csp
- distance
);
492 if (copy_in_user((void __user
*) rval
, (void __user
*) psp
, distance
))
494 else if (test_thread_flag(TIF_32BIT
)) {
495 if (put_user(((u32
)csp
),
496 &(((struct reg_window32 __user
*)rval
)->ins
[6])))
499 if (put_user(((u64
)csp
- STACK_BIAS
),
500 &(((struct reg_window __user
*)rval
)->ins
[6])))
503 rval
= rval
- STACK_BIAS
;
509 /* Standard stuff. */
510 static inline void shift_window_buffer(int first_win
, int last_win
,
511 struct thread_info
*t
)
515 for (i
= first_win
; i
< last_win
; i
++) {
516 t
->rwbuf_stkptrs
[i
] = t
->rwbuf_stkptrs
[i
+1];
517 memcpy(&t
->reg_window
[i
], &t
->reg_window
[i
+1],
518 sizeof(struct reg_window
));
522 void synchronize_user_stack(void)
524 struct thread_info
*t
= current_thread_info();
525 unsigned long window
;
527 flush_user_windows();
528 if ((window
= get_thread_wsaved()) != 0) {
529 int winsize
= sizeof(struct reg_window
);
532 if (test_thread_flag(TIF_32BIT
))
533 winsize
= sizeof(struct reg_window32
);
539 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
540 struct reg_window
*rwin
= &t
->reg_window
[window
];
542 if (!copy_to_user((char __user
*)sp
, rwin
, winsize
)) {
543 shift_window_buffer(window
, get_thread_wsaved() - 1, t
);
544 set_thread_wsaved(get_thread_wsaved() - 1);
550 void fault_in_user_windows(void)
552 struct thread_info
*t
= current_thread_info();
553 unsigned long window
;
554 int winsize
= sizeof(struct reg_window
);
557 if (test_thread_flag(TIF_32BIT
))
558 winsize
= sizeof(struct reg_window32
);
562 flush_user_windows();
563 window
= get_thread_wsaved();
568 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
569 struct reg_window
*rwin
= &t
->reg_window
[window
];
571 if (copy_to_user((char __user
*)sp
, rwin
, winsize
))
575 set_thread_wsaved(0);
579 set_thread_wsaved(window
+ 1);
583 asmlinkage
long sparc_do_fork(unsigned long clone_flags
,
584 unsigned long stack_start
,
585 struct pt_regs
*regs
,
586 unsigned long stack_size
)
588 int __user
*parent_tid_ptr
, *child_tid_ptr
;
591 if (test_thread_flag(TIF_32BIT
)) {
592 parent_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I2
]);
593 child_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I4
]);
597 parent_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I2
];
598 child_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I4
];
601 return do_fork(clone_flags
, stack_start
,
603 parent_tid_ptr
, child_tid_ptr
);
606 /* Copy a Sparc thread. The fork() return value conventions
607 * under SunOS are nothing short of bletcherous:
608 * Parent --> %o0 == childs pid, %o1 == 0
609 * Child --> %o0 == parents pid, %o1 == 1
611 int copy_thread(int nr
, unsigned long clone_flags
, unsigned long sp
,
612 unsigned long unused
,
613 struct task_struct
*p
, struct pt_regs
*regs
)
615 struct thread_info
*t
= p
->thread_info
;
616 char *child_trap_frame
;
618 #ifdef CONFIG_DEBUG_SPINLOCK
619 p
->thread
.smp_lock_count
= 0;
620 p
->thread
.smp_lock_pc
= 0;
623 /* Calculate offset to stack_frame & pt_regs */
624 child_trap_frame
= ((char *)t
) + (THREAD_SIZE
- (TRACEREG_SZ
+STACKFRAME_SZ
));
625 memcpy(child_trap_frame
, (((struct sparc_stackf
*)regs
)-1), (TRACEREG_SZ
+STACKFRAME_SZ
));
627 t
->flags
= (t
->flags
& ~((0xffUL
<< TI_FLAG_CWP_SHIFT
) | (0xffUL
<< TI_FLAG_CURRENT_DS_SHIFT
))) |
629 (((regs
->tstate
+ 1) & TSTATE_CWP
) << TI_FLAG_CWP_SHIFT
);
630 t
->ksp
= ((unsigned long) child_trap_frame
) - STACK_BIAS
;
631 t
->kregs
= (struct pt_regs
*)(child_trap_frame
+sizeof(struct sparc_stackf
));
634 if (regs
->tstate
& TSTATE_PRIV
) {
635 /* Special case, if we are spawning a kernel thread from
636 * a userspace task (via KMOD, NFS, or similar) we must
637 * disable performance counters in the child because the
638 * address space and protection realm are changing.
640 if (t
->flags
& _TIF_PERFCTR
) {
641 t
->user_cntd0
= t
->user_cntd1
= NULL
;
643 t
->flags
&= ~_TIF_PERFCTR
;
645 t
->kregs
->u_regs
[UREG_FP
] = t
->ksp
;
646 t
->flags
|= ((long)ASI_P
<< TI_FLAG_CURRENT_DS_SHIFT
);
647 flush_register_windows();
648 memcpy((void *)(t
->ksp
+ STACK_BIAS
),
649 (void *)(regs
->u_regs
[UREG_FP
] + STACK_BIAS
),
650 sizeof(struct sparc_stackf
));
651 t
->kregs
->u_regs
[UREG_G6
] = (unsigned long) t
;
652 t
->kregs
->u_regs
[UREG_G4
] = (unsigned long) t
->task
;
654 if (t
->flags
& _TIF_32BIT
) {
655 sp
&= 0x00000000ffffffffUL
;
656 regs
->u_regs
[UREG_FP
] &= 0x00000000ffffffffUL
;
658 t
->kregs
->u_regs
[UREG_FP
] = sp
;
659 t
->flags
|= ((long)ASI_AIUS
<< TI_FLAG_CURRENT_DS_SHIFT
);
660 if (sp
!= regs
->u_regs
[UREG_FP
]) {
663 csp
= clone_stackframe(sp
, regs
->u_regs
[UREG_FP
]);
666 t
->kregs
->u_regs
[UREG_FP
] = csp
;
672 /* Set the return value for the child. */
673 t
->kregs
->u_regs
[UREG_I0
] = current
->pid
;
674 t
->kregs
->u_regs
[UREG_I1
] = 1;
676 /* Set the second return value for the parent. */
677 regs
->u_regs
[UREG_I1
] = 0;
679 if (clone_flags
& CLONE_SETTLS
)
680 t
->kregs
->u_regs
[UREG_G7
] = regs
->u_regs
[UREG_I3
];
686 * This is the mechanism for creating a new kernel thread.
688 * NOTE! Only a kernel-only process(ie the swapper or direct descendants
689 * who haven't done an "execve()") should use this: it will work within
690 * a system call from a "real" process, but the process memory space will
691 * not be free'd until both the parent and the child have exited.
693 pid_t
kernel_thread(int (*fn
)(void *), void * arg
, unsigned long flags
)
697 /* If the parent runs before fn(arg) is called by the child,
698 * the input registers of this function can be clobbered.
699 * So we stash 'fn' and 'arg' into global registers which
700 * will not be modified by the parent.
702 __asm__
__volatile__("mov %4, %%g2\n\t" /* Save FN into global */
703 "mov %5, %%g3\n\t" /* Save ARG into global */
704 "mov %1, %%g1\n\t" /* Clone syscall nr. */
705 "mov %2, %%o0\n\t" /* Clone flags. */
706 "mov 0, %%o1\n\t" /* usp arg == 0 */
707 "t 0x6d\n\t" /* Linux/Sparc clone(). */
708 "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
710 "jmpl %%g2, %%o7\n\t" /* Call the function. */
711 " mov %%g3, %%o0\n\t" /* Set arg in delay. */
713 "t 0x6d\n\t" /* Linux/Sparc exit(). */
714 /* Notreached by child. */
717 "i" (__NR_clone
), "r" (flags
| CLONE_VM
| CLONE_UNTRACED
),
718 "i" (__NR_exit
), "r" (fn
), "r" (arg
) :
719 "g1", "g2", "g3", "o0", "o1", "memory", "cc");
724 * fill in the user structure for a core dump..
726 void dump_thread(struct pt_regs
* regs
, struct user
* dump
)
728 /* Only should be used for SunOS and ancient a.out
729 * SparcLinux binaries... Not worth implementing.
731 memset(dump
, 0, sizeof(struct user
));
736 unsigned int pr_regs
[32];
737 unsigned long pr_dregs
[16];
739 unsigned int __unused
;
741 unsigned char pr_qcnt
;
742 unsigned char pr_q_entrysize
;
744 unsigned int pr_q
[64];
748 * fill in the fpu structure for a core dump.
750 int dump_fpu (struct pt_regs
* regs
, elf_fpregset_t
* fpregs
)
752 unsigned long *kfpregs
= current_thread_info()->fpregs
;
753 unsigned long fprs
= current_thread_info()->fpsaved
[0];
755 if (test_thread_flag(TIF_32BIT
)) {
756 elf_fpregset_t32
*fpregs32
= (elf_fpregset_t32
*)fpregs
;
759 memcpy(&fpregs32
->pr_fr
.pr_regs
[0], kfpregs
,
760 sizeof(unsigned int) * 32);
762 memset(&fpregs32
->pr_fr
.pr_regs
[0], 0,
763 sizeof(unsigned int) * 32);
764 fpregs32
->pr_qcnt
= 0;
765 fpregs32
->pr_q_entrysize
= 8;
766 memset(&fpregs32
->pr_q
[0], 0,
767 (sizeof(unsigned int) * 64));
768 if (fprs
& FPRS_FEF
) {
769 fpregs32
->pr_fsr
= (unsigned int) current_thread_info()->xfsr
[0];
772 fpregs32
->pr_fsr
= 0;
777 memcpy(&fpregs
->pr_regs
[0], kfpregs
,
778 sizeof(unsigned int) * 32);
780 memset(&fpregs
->pr_regs
[0], 0,
781 sizeof(unsigned int) * 32);
783 memcpy(&fpregs
->pr_regs
[16], kfpregs
+16,
784 sizeof(unsigned int) * 32);
786 memset(&fpregs
->pr_regs
[16], 0,
787 sizeof(unsigned int) * 32);
788 if(fprs
& FPRS_FEF
) {
789 fpregs
->pr_fsr
= current_thread_info()->xfsr
[0];
790 fpregs
->pr_gsr
= current_thread_info()->gsr
[0];
792 fpregs
->pr_fsr
= fpregs
->pr_gsr
= 0;
794 fpregs
->pr_fprs
= fprs
;
800 * sparc_execve() executes a new program after the asm stub has set
801 * things up for us. This should basically do what I want it to.
803 asmlinkage
int sparc_execve(struct pt_regs
*regs
)
808 /* User register window flush is done by entry.S */
810 /* Check for indirect call. */
811 if (regs
->u_regs
[UREG_G1
] == 0)
814 filename
= getname((char __user
*)regs
->u_regs
[base
+ UREG_I0
]);
815 error
= PTR_ERR(filename
);
816 if (IS_ERR(filename
))
818 error
= do_execve(filename
,
819 (char __user
* __user
*)
820 regs
->u_regs
[base
+ UREG_I1
],
821 (char __user
* __user
*)
822 regs
->u_regs
[base
+ UREG_I2
], regs
);
826 current_thread_info()->xfsr
[0] = 0;
827 current_thread_info()->fpsaved
[0] = 0;
828 regs
->tstate
&= ~TSTATE_PEF
;
830 current
->ptrace
&= ~PT_DTRACE
;
831 task_unlock(current
);
837 unsigned long get_wchan(struct task_struct
*task
)
839 unsigned long pc
, fp
, bias
= 0;
840 unsigned long thread_info_base
;
841 struct reg_window
*rw
;
842 unsigned long ret
= 0;
845 if (!task
|| task
== current
||
846 task
->state
== TASK_RUNNING
)
849 thread_info_base
= (unsigned long) task
->thread_info
;
851 fp
= task
->thread_info
->ksp
+ bias
;
854 /* Bogus frame pointer? */
855 if (fp
< (thread_info_base
+ sizeof(struct thread_info
)) ||
856 fp
>= (thread_info_base
+ THREAD_SIZE
))
858 rw
= (struct reg_window
*) fp
;
860 if (!in_sched_functions(pc
)) {
864 fp
= rw
->ins
[6] + bias
;
865 } while (++count
< 16);