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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/errno.h>
16 #include <linux/module.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
19 #include <linux/kallsyms.h>
22 #include <linux/smp.h>
23 #include <linux/stddef.h>
24 #include <linux/ptrace.h>
25 #include <linux/slab.h>
26 #include <linux/user.h>
27 #include <linux/a.out.h>
28 #include <linux/reboot.h>
29 #include <linux/delay.h>
30 #include <linux/compat.h>
31 #include <linux/tick.h>
32 #include <linux/init.h>
33 #include <linux/cpu.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>
49 #include <asm/hypervisor.h>
50 #include <asm/sstate.h>
52 /* #define VERBOSE_SHOWREGS */
54 static void sparc64_yield(int cpu
)
56 if (tlb_type
!= hypervisor
)
59 clear_thread_flag(TIF_POLLING_NRFLAG
);
60 smp_mb__after_clear_bit();
62 while (!need_resched() && !cpu_is_offline(cpu
)) {
65 /* Disable interrupts. */
67 "rdpr %%pstate, %0\n\t"
69 "wrpr %0, %%g0, %%pstate"
73 if (!need_resched() && !cpu_is_offline(cpu
))
76 /* Re-enable interrupts. */
78 "rdpr %%pstate, %0\n\t"
80 "wrpr %0, %%g0, %%pstate"
85 set_thread_flag(TIF_POLLING_NRFLAG
);
88 /* The idle loop on sparc64. */
91 int cpu
= smp_processor_id();
93 set_thread_flag(TIF_POLLING_NRFLAG
);
96 tick_nohz_stop_sched_tick();
98 while (!need_resched() && !cpu_is_offline(cpu
))
101 tick_nohz_restart_sched_tick();
103 preempt_enable_no_resched();
105 #ifdef CONFIG_HOTPLUG_CPU
106 if (cpu_is_offline(cpu
))
115 extern char reboot_command
[];
117 extern void (*prom_palette
)(int);
118 extern void (*prom_keyboard
)(void);
120 void machine_halt(void)
128 panic("Halt failed!");
131 void machine_alt_power_off(void)
138 prom_halt_power_off();
139 panic("Power-off failed!");
142 void machine_restart(char * cmd
)
147 p
= strchr (reboot_command
, '\n');
156 prom_reboot(reboot_command
);
158 panic("Reboot failed!");
162 static void show_regwindow32(struct pt_regs
*regs
)
164 struct reg_window32 __user
*rw
;
165 struct reg_window32 r_w
;
168 __asm__
__volatile__ ("flushw");
169 rw
= compat_ptr((unsigned)regs
->u_regs
[14]);
172 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
178 printk("l0: %08x l1: %08x l2: %08x l3: %08x "
179 "l4: %08x l5: %08x l6: %08x l7: %08x\n",
180 r_w
.locals
[0], r_w
.locals
[1], r_w
.locals
[2], r_w
.locals
[3],
181 r_w
.locals
[4], r_w
.locals
[5], r_w
.locals
[6], r_w
.locals
[7]);
182 printk("i0: %08x i1: %08x i2: %08x i3: %08x "
183 "i4: %08x i5: %08x i6: %08x i7: %08x\n",
184 r_w
.ins
[0], r_w
.ins
[1], r_w
.ins
[2], r_w
.ins
[3],
185 r_w
.ins
[4], r_w
.ins
[5], r_w
.ins
[6], r_w
.ins
[7]);
188 #define show_regwindow32(regs) do { } while (0)
191 static void show_regwindow(struct pt_regs
*regs
)
193 struct reg_window __user
*rw
;
194 struct reg_window
*rwk
;
195 struct reg_window r_w
;
198 if ((regs
->tstate
& TSTATE_PRIV
) || !(test_thread_flag(TIF_32BIT
))) {
199 __asm__
__volatile__ ("flushw");
200 rw
= (struct reg_window __user
*)
201 (regs
->u_regs
[14] + STACK_BIAS
);
202 rwk
= (struct reg_window
*)
203 (regs
->u_regs
[14] + STACK_BIAS
);
204 if (!(regs
->tstate
& TSTATE_PRIV
)) {
207 if (copy_from_user (&r_w
, rw
, sizeof(r_w
))) {
215 show_regwindow32(regs
);
218 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n",
219 rwk
->locals
[0], rwk
->locals
[1], rwk
->locals
[2], rwk
->locals
[3]);
220 printk("l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
221 rwk
->locals
[4], rwk
->locals
[5], rwk
->locals
[6], rwk
->locals
[7]);
222 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n",
223 rwk
->ins
[0], rwk
->ins
[1], rwk
->ins
[2], rwk
->ins
[3]);
224 printk("i4: %016lx i5: %016lx i6: %016lx i7: %016lx\n",
225 rwk
->ins
[4], rwk
->ins
[5], rwk
->ins
[6], rwk
->ins
[7]);
226 if (regs
->tstate
& TSTATE_PRIV
)
227 print_symbol("I7: <%s>\n", rwk
->ins
[7]);
230 void show_stackframe(struct sparc_stackf
*sf
)
236 printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n"
237 "l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
238 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3],
239 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
240 printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n"
241 "i4: %016lx i5: %016lx fp: %016lx ret_pc: %016lx\n",
242 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3],
243 sf
->ins
[4], sf
->ins
[5], (unsigned long)sf
->fp
, sf
->callers_pc
);
244 printk("sp: %016lx x0: %016lx x1: %016lx x2: %016lx\n"
245 "x3: %016lx x4: %016lx x5: %016lx xx: %016lx\n",
246 (unsigned long)sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
247 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
249 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
250 size
-= STACKFRAME_SZ
;
251 stk
= (unsigned long *)((unsigned long)sf
+ STACKFRAME_SZ
);
254 printk("s%d: %016lx\n", i
++, *stk
++);
255 } while ((size
-= sizeof(unsigned long)));
258 void show_stackframe32(struct sparc_stackf32
*sf
)
264 printk("l0: %08x l1: %08x l2: %08x l3: %08x\n",
265 sf
->locals
[0], sf
->locals
[1], sf
->locals
[2], sf
->locals
[3]);
266 printk("l4: %08x l5: %08x l6: %08x l7: %08x\n",
267 sf
->locals
[4], sf
->locals
[5], sf
->locals
[6], sf
->locals
[7]);
268 printk("i0: %08x i1: %08x i2: %08x i3: %08x\n",
269 sf
->ins
[0], sf
->ins
[1], sf
->ins
[2], sf
->ins
[3]);
270 printk("i4: %08x i5: %08x fp: %08x ret_pc: %08x\n",
271 sf
->ins
[4], sf
->ins
[5], sf
->fp
, sf
->callers_pc
);
272 printk("sp: %08x x0: %08x x1: %08x x2: %08x\n"
273 "x3: %08x x4: %08x x5: %08x xx: %08x\n",
274 sf
->structptr
, sf
->xargs
[0], sf
->xargs
[1],
275 sf
->xargs
[2], sf
->xargs
[3], sf
->xargs
[4], sf
->xargs
[5],
277 size
= ((unsigned long)sf
->fp
) - ((unsigned long)sf
);
278 size
-= STACKFRAME32_SZ
;
279 stk
= (unsigned *)((unsigned long)sf
+ STACKFRAME32_SZ
);
282 printk("s%d: %08x\n", i
++, *stk
++);
283 } while ((size
-= sizeof(unsigned)));
287 static DEFINE_SPINLOCK(regdump_lock
);
290 void __show_regs(struct pt_regs
* regs
)
295 /* Protect against xcall ipis which might lead to livelock on the lock */
296 __asm__
__volatile__("rdpr %%pstate, %0\n\t"
297 "wrpr %0, %1, %%pstate"
300 spin_lock(®dump_lock
);
302 printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x %s\n", regs
->tstate
,
303 regs
->tpc
, regs
->tnpc
, regs
->y
, print_tainted());
304 print_symbol("TPC: <%s>\n", regs
->tpc
);
305 printk("g0: %016lx g1: %016lx g2: %016lx g3: %016lx\n",
306 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
308 printk("g4: %016lx g5: %016lx g6: %016lx g7: %016lx\n",
309 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
311 printk("o0: %016lx o1: %016lx o2: %016lx o3: %016lx\n",
312 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
314 printk("o4: %016lx o5: %016lx sp: %016lx ret_pc: %016lx\n",
315 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
317 print_symbol("RPC: <%s>\n", regs
->u_regs
[15]);
318 show_regwindow(regs
);
320 spin_unlock(®dump_lock
);
321 __asm__
__volatile__("wrpr %0, 0, %%pstate"
326 #ifdef VERBOSE_SHOWREGS
327 static void idump_from_user (unsigned int *pc
)
332 if((((unsigned long) pc
) & 3))
336 for(i
= -3; i
< 6; i
++) {
338 printk("%c%08x%c",i
?' ':'<',code
,i
?' ':'>');
345 void show_regs(struct pt_regs
*regs
)
347 #ifdef VERBOSE_SHOWREGS
348 extern long etrap
, etraptl1
;
354 extern void smp_report_regs(void);
361 #ifdef VERBOSE_SHOWREGS
362 if (regs
->tpc
>= &etrap
&& regs
->tpc
< &etraptl1
&&
363 regs
->u_regs
[14] >= (long)current
- PAGE_SIZE
&&
364 regs
->u_regs
[14] < (long)current
+ 6 * PAGE_SIZE
) {
365 printk ("*********parent**********\n");
366 __show_regs((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
));
367 idump_from_user(((struct pt_regs
*)(regs
->u_regs
[14] + PTREGS_OFF
))->tpc
);
368 printk ("*********endpar**********\n");
373 void show_regs32(struct pt_regs32
*regs
)
375 printk("PSR: %08x PC: %08x NPC: %08x Y: %08x %s\n", regs
->psr
,
376 regs
->pc
, regs
->npc
, regs
->y
, print_tainted());
377 printk("g0: %08x g1: %08x g2: %08x g3: %08x ",
378 regs
->u_regs
[0], regs
->u_regs
[1], regs
->u_regs
[2],
380 printk("g4: %08x g5: %08x g6: %08x g7: %08x\n",
381 regs
->u_regs
[4], regs
->u_regs
[5], regs
->u_regs
[6],
383 printk("o0: %08x o1: %08x o2: %08x o3: %08x ",
384 regs
->u_regs
[8], regs
->u_regs
[9], regs
->u_regs
[10],
386 printk("o4: %08x o5: %08x sp: %08x ret_pc: %08x\n",
387 regs
->u_regs
[12], regs
->u_regs
[13], regs
->u_regs
[14],
391 unsigned long thread_saved_pc(struct task_struct
*tsk
)
393 struct thread_info
*ti
= task_thread_info(tsk
);
394 unsigned long ret
= 0xdeadbeefUL
;
398 sp
= (unsigned long *)(ti
->ksp
+ STACK_BIAS
);
399 if (((unsigned long)sp
& (sizeof(long) - 1)) == 0UL &&
402 fp
= (unsigned long *)(sp
[14] + STACK_BIAS
);
403 if (((unsigned long)fp
& (sizeof(long) - 1)) == 0UL)
410 /* Free current thread data structures etc.. */
411 void exit_thread(void)
413 struct thread_info
*t
= current_thread_info();
416 if (t
->utraps
[0] < 2)
422 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
423 t
->user_cntd0
= t
->user_cntd1
= NULL
;
429 void flush_thread(void)
431 struct thread_info
*t
= current_thread_info();
432 struct mm_struct
*mm
;
434 if (test_ti_thread_flag(t
, TIF_ABI_PENDING
)) {
435 clear_ti_thread_flag(t
, TIF_ABI_PENDING
);
436 if (test_ti_thread_flag(t
, TIF_32BIT
))
437 clear_ti_thread_flag(t
, TIF_32BIT
);
439 set_ti_thread_flag(t
, TIF_32BIT
);
444 tsb_context_switch(mm
);
446 set_thread_wsaved(0);
448 /* Turn off performance counters if on. */
449 if (test_and_clear_thread_flag(TIF_PERFCTR
)) {
450 t
->user_cntd0
= t
->user_cntd1
= NULL
;
455 /* Clear FPU register state. */
458 if (get_thread_current_ds() != ASI_AIUS
)
461 /* Init new signal delivery disposition. */
462 clear_thread_flag(TIF_NEWSIGNALS
);
465 /* It's a bit more tricky when 64-bit tasks are involved... */
466 static unsigned long clone_stackframe(unsigned long csp
, unsigned long psp
)
468 unsigned long fp
, distance
, rval
;
470 if (!(test_thread_flag(TIF_32BIT
))) {
473 __get_user(fp
, &(((struct reg_window __user
*)psp
)->ins
[6]));
476 __get_user(fp
, &(((struct reg_window32 __user
*)psp
)->ins
[6]));
478 /* Now 8-byte align the stack as this is mandatory in the
479 * Sparc ABI due to how register windows work. This hides
480 * the restriction from thread libraries etc. -DaveM
485 rval
= (csp
- distance
);
486 if (copy_in_user((void __user
*) rval
, (void __user
*) psp
, distance
))
488 else if (test_thread_flag(TIF_32BIT
)) {
489 if (put_user(((u32
)csp
),
490 &(((struct reg_window32 __user
*)rval
)->ins
[6])))
493 if (put_user(((u64
)csp
- STACK_BIAS
),
494 &(((struct reg_window __user
*)rval
)->ins
[6])))
497 rval
= rval
- STACK_BIAS
;
503 /* Standard stuff. */
504 static inline void shift_window_buffer(int first_win
, int last_win
,
505 struct thread_info
*t
)
509 for (i
= first_win
; i
< last_win
; i
++) {
510 t
->rwbuf_stkptrs
[i
] = t
->rwbuf_stkptrs
[i
+1];
511 memcpy(&t
->reg_window
[i
], &t
->reg_window
[i
+1],
512 sizeof(struct reg_window
));
516 void synchronize_user_stack(void)
518 struct thread_info
*t
= current_thread_info();
519 unsigned long window
;
521 flush_user_windows();
522 if ((window
= get_thread_wsaved()) != 0) {
523 int winsize
= sizeof(struct reg_window
);
526 if (test_thread_flag(TIF_32BIT
))
527 winsize
= sizeof(struct reg_window32
);
533 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
534 struct reg_window
*rwin
= &t
->reg_window
[window
];
536 if (!copy_to_user((char __user
*)sp
, rwin
, winsize
)) {
537 shift_window_buffer(window
, get_thread_wsaved() - 1, t
);
538 set_thread_wsaved(get_thread_wsaved() - 1);
544 static void stack_unaligned(unsigned long sp
)
548 info
.si_signo
= SIGBUS
;
550 info
.si_code
= BUS_ADRALN
;
551 info
.si_addr
= (void __user
*) sp
;
553 force_sig_info(SIGBUS
, &info
, current
);
556 void fault_in_user_windows(void)
558 struct thread_info
*t
= current_thread_info();
559 unsigned long window
;
560 int winsize
= sizeof(struct reg_window
);
563 if (test_thread_flag(TIF_32BIT
))
564 winsize
= sizeof(struct reg_window32
);
568 flush_user_windows();
569 window
= get_thread_wsaved();
571 if (likely(window
!= 0)) {
574 unsigned long sp
= (t
->rwbuf_stkptrs
[window
] + bias
);
575 struct reg_window
*rwin
= &t
->reg_window
[window
];
577 if (unlikely(sp
& 0x7UL
))
580 if (unlikely(copy_to_user((char __user
*)sp
,
585 set_thread_wsaved(0);
589 set_thread_wsaved(window
+ 1);
593 asmlinkage
long sparc_do_fork(unsigned long clone_flags
,
594 unsigned long stack_start
,
595 struct pt_regs
*regs
,
596 unsigned long stack_size
)
598 int __user
*parent_tid_ptr
, *child_tid_ptr
;
601 if (test_thread_flag(TIF_32BIT
)) {
602 parent_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I2
]);
603 child_tid_ptr
= compat_ptr(regs
->u_regs
[UREG_I4
]);
607 parent_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I2
];
608 child_tid_ptr
= (int __user
*) regs
->u_regs
[UREG_I4
];
611 return do_fork(clone_flags
, stack_start
,
613 parent_tid_ptr
, child_tid_ptr
);
616 /* Copy a Sparc thread. The fork() return value conventions
617 * under SunOS are nothing short of bletcherous:
618 * Parent --> %o0 == childs pid, %o1 == 0
619 * Child --> %o0 == parents pid, %o1 == 1
621 int copy_thread(int nr
, unsigned long clone_flags
, unsigned long sp
,
622 unsigned long unused
,
623 struct task_struct
*p
, struct pt_regs
*regs
)
625 struct thread_info
*t
= task_thread_info(p
);
626 char *child_trap_frame
;
628 /* Calculate offset to stack_frame & pt_regs */
629 child_trap_frame
= task_stack_page(p
) + (THREAD_SIZE
- (TRACEREG_SZ
+STACKFRAME_SZ
));
630 memcpy(child_trap_frame
, (((struct sparc_stackf
*)regs
)-1), (TRACEREG_SZ
+STACKFRAME_SZ
));
632 t
->flags
= (t
->flags
& ~((0xffUL
<< TI_FLAG_CWP_SHIFT
) | (0xffUL
<< TI_FLAG_CURRENT_DS_SHIFT
))) |
633 (((regs
->tstate
+ 1) & TSTATE_CWP
) << TI_FLAG_CWP_SHIFT
);
635 t
->ksp
= ((unsigned long) child_trap_frame
) - STACK_BIAS
;
636 t
->kregs
= (struct pt_regs
*)(child_trap_frame
+sizeof(struct sparc_stackf
));
639 if (regs
->tstate
& TSTATE_PRIV
) {
640 /* Special case, if we are spawning a kernel thread from
641 * a userspace task (via KMOD, NFS, or similar) we must
642 * disable performance counters in the child because the
643 * address space and protection realm are changing.
645 if (t
->flags
& _TIF_PERFCTR
) {
646 t
->user_cntd0
= t
->user_cntd1
= NULL
;
648 t
->flags
&= ~_TIF_PERFCTR
;
650 t
->kregs
->u_regs
[UREG_FP
] = t
->ksp
;
651 t
->flags
|= ((long)ASI_P
<< TI_FLAG_CURRENT_DS_SHIFT
);
652 flush_register_windows();
653 memcpy((void *)(t
->ksp
+ STACK_BIAS
),
654 (void *)(regs
->u_regs
[UREG_FP
] + STACK_BIAS
),
655 sizeof(struct sparc_stackf
));
656 t
->kregs
->u_regs
[UREG_G6
] = (unsigned long) t
;
657 t
->kregs
->u_regs
[UREG_G4
] = (unsigned long) t
->task
;
659 if (t
->flags
& _TIF_32BIT
) {
660 sp
&= 0x00000000ffffffffUL
;
661 regs
->u_regs
[UREG_FP
] &= 0x00000000ffffffffUL
;
663 t
->kregs
->u_regs
[UREG_FP
] = sp
;
664 t
->flags
|= ((long)ASI_AIUS
<< TI_FLAG_CURRENT_DS_SHIFT
);
665 if (sp
!= regs
->u_regs
[UREG_FP
]) {
668 csp
= clone_stackframe(sp
, regs
->u_regs
[UREG_FP
]);
671 t
->kregs
->u_regs
[UREG_FP
] = csp
;
677 /* Set the return value for the child. */
678 t
->kregs
->u_regs
[UREG_I0
] = current
->pid
;
679 t
->kregs
->u_regs
[UREG_I1
] = 1;
681 /* Set the second return value for the parent. */
682 regs
->u_regs
[UREG_I1
] = 0;
684 if (clone_flags
& CLONE_SETTLS
)
685 t
->kregs
->u_regs
[UREG_G7
] = regs
->u_regs
[UREG_I3
];
691 * This is the mechanism for creating a new kernel thread.
693 * NOTE! Only a kernel-only process(ie the swapper or direct descendants
694 * who haven't done an "execve()") should use this: it will work within
695 * a system call from a "real" process, but the process memory space will
696 * not be freed until both the parent and the child have exited.
698 pid_t
kernel_thread(int (*fn
)(void *), void * arg
, unsigned long flags
)
702 /* If the parent runs before fn(arg) is called by the child,
703 * the input registers of this function can be clobbered.
704 * So we stash 'fn' and 'arg' into global registers which
705 * will not be modified by the parent.
707 __asm__
__volatile__("mov %4, %%g2\n\t" /* Save FN into global */
708 "mov %5, %%g3\n\t" /* Save ARG into global */
709 "mov %1, %%g1\n\t" /* Clone syscall nr. */
710 "mov %2, %%o0\n\t" /* Clone flags. */
711 "mov 0, %%o1\n\t" /* usp arg == 0 */
712 "t 0x6d\n\t" /* Linux/Sparc clone(). */
713 "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
715 "jmpl %%g2, %%o7\n\t" /* Call the function. */
716 " mov %%g3, %%o0\n\t" /* Set arg in delay. */
718 "t 0x6d\n\t" /* Linux/Sparc exit(). */
719 /* Notreached by child. */
722 "i" (__NR_clone
), "r" (flags
| CLONE_VM
| CLONE_UNTRACED
),
723 "i" (__NR_exit
), "r" (fn
), "r" (arg
) :
724 "g1", "g2", "g3", "o0", "o1", "memory", "cc");
729 * fill in the user structure for a core dump..
731 void dump_thread(struct pt_regs
* regs
, struct user
* dump
)
733 /* Only should be used for SunOS and ancient a.out
734 * SparcLinux binaries... Not worth implementing.
736 memset(dump
, 0, sizeof(struct user
));
741 unsigned int pr_regs
[32];
742 unsigned long pr_dregs
[16];
744 unsigned int __unused
;
746 unsigned char pr_qcnt
;
747 unsigned char pr_q_entrysize
;
749 unsigned int pr_q
[64];
753 * fill in the fpu structure for a core dump.
755 int dump_fpu (struct pt_regs
* regs
, elf_fpregset_t
* fpregs
)
757 unsigned long *kfpregs
= current_thread_info()->fpregs
;
758 unsigned long fprs
= current_thread_info()->fpsaved
[0];
760 if (test_thread_flag(TIF_32BIT
)) {
761 elf_fpregset_t32
*fpregs32
= (elf_fpregset_t32
*)fpregs
;
764 memcpy(&fpregs32
->pr_fr
.pr_regs
[0], kfpregs
,
765 sizeof(unsigned int) * 32);
767 memset(&fpregs32
->pr_fr
.pr_regs
[0], 0,
768 sizeof(unsigned int) * 32);
769 fpregs32
->pr_qcnt
= 0;
770 fpregs32
->pr_q_entrysize
= 8;
771 memset(&fpregs32
->pr_q
[0], 0,
772 (sizeof(unsigned int) * 64));
773 if (fprs
& FPRS_FEF
) {
774 fpregs32
->pr_fsr
= (unsigned int) current_thread_info()->xfsr
[0];
777 fpregs32
->pr_fsr
= 0;
782 memcpy(&fpregs
->pr_regs
[0], kfpregs
,
783 sizeof(unsigned int) * 32);
785 memset(&fpregs
->pr_regs
[0], 0,
786 sizeof(unsigned int) * 32);
788 memcpy(&fpregs
->pr_regs
[16], kfpregs
+16,
789 sizeof(unsigned int) * 32);
791 memset(&fpregs
->pr_regs
[16], 0,
792 sizeof(unsigned int) * 32);
793 if(fprs
& FPRS_FEF
) {
794 fpregs
->pr_fsr
= current_thread_info()->xfsr
[0];
795 fpregs
->pr_gsr
= current_thread_info()->gsr
[0];
797 fpregs
->pr_fsr
= fpregs
->pr_gsr
= 0;
799 fpregs
->pr_fprs
= fprs
;
805 * sparc_execve() executes a new program after the asm stub has set
806 * things up for us. This should basically do what I want it to.
808 asmlinkage
int sparc_execve(struct pt_regs
*regs
)
813 /* User register window flush is done by entry.S */
815 /* Check for indirect call. */
816 if (regs
->u_regs
[UREG_G1
] == 0)
819 filename
= getname((char __user
*)regs
->u_regs
[base
+ UREG_I0
]);
820 error
= PTR_ERR(filename
);
821 if (IS_ERR(filename
))
823 error
= do_execve(filename
,
824 (char __user
* __user
*)
825 regs
->u_regs
[base
+ UREG_I1
],
826 (char __user
* __user
*)
827 regs
->u_regs
[base
+ UREG_I2
], regs
);
831 current_thread_info()->xfsr
[0] = 0;
832 current_thread_info()->fpsaved
[0] = 0;
833 regs
->tstate
&= ~TSTATE_PEF
;
835 current
->ptrace
&= ~PT_DTRACE
;
836 task_unlock(current
);
842 unsigned long get_wchan(struct task_struct
*task
)
844 unsigned long pc
, fp
, bias
= 0;
845 unsigned long thread_info_base
;
846 struct reg_window
*rw
;
847 unsigned long ret
= 0;
850 if (!task
|| task
== current
||
851 task
->state
== TASK_RUNNING
)
854 thread_info_base
= (unsigned long) task_stack_page(task
);
856 fp
= task_thread_info(task
)->ksp
+ bias
;
859 /* Bogus frame pointer? */
860 if (fp
< (thread_info_base
+ sizeof(struct thread_info
)) ||
861 fp
>= (thread_info_base
+ THREAD_SIZE
))
863 rw
= (struct reg_window
*) fp
;
865 if (!in_sched_functions(pc
)) {
869 fp
= rw
->ins
[6] + bias
;
870 } while (++count
< 16);