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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [sparc/] [kernel/] [process.c] - Blame information for rev 1765

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/*  $Id: process.c,v 1.1 2005-12-20 09:50:43 jcastillo Exp $
 *  linux/arch/sparc/kernel/process.c
 *
 *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */
 
/*
 * This file handles the architecture-dependent parts of process handling..
 */
 
#define __KERNEL_SYSCALLS__
#include <stdarg.h>
 
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/malloc.h>
#include <linux/ldt.h>
#include <linux/user.h>
#include <linux/a.out.h>
 
#include <asm/auxio.h>
#include <asm/oplib.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/delay.h>
#include <asm/processor.h>
#include <asm/psr.h>
#include <asm/system.h>
 
extern void fpsave(unsigned long *, unsigned long *, void *, unsigned long *);
 
int active_ds = USER_DS;
 
#ifndef __SMP__
 
/*
 * the idle loop on a Sparc... ;)
 */
asmlinkage int sys_idle(void)
{
        if (current->pid != 0)
                return -EPERM;
 
        /* endless idle loop with no priority at all */
        current->counter = -100;
        for (;;) {
                schedule();
        }
        return 0;
}
 
#else
 
/*
 * the idle loop on a SparcMultiPenguin...
 */
asmlinkage int sys_idle(void)
{
        if (current->pid != 0)
                return -EPERM;
 
        /* endless idle loop with no priority at all */
        current->counter = -100;
        schedule();
        return 0;
}
 
/* This is being executed in task 0 'user space'. */
int cpu_idle(void *unused)
{
        volatile int *spap = &smp_process_available;
        volatile int cval;
 
        while(1) {
                if(0==read_smp_counter(spap))
                        continue;
                cli();
                /* Acquire exclusive access. */
                while((cval = smp_swap(spap, -1)) == -1)
                        ;
                if (0==cval) {
                        /* ho hum, release it. */
                        smp_process_available = 0;
                        sti();
                        continue;
                }
                /* Something interesting happened, whee... */
                smp_swap(spap, (cval - 1));
                sti();
                idle();
        }
}
 
#endif
 
extern char saved_command_line[];
 
void hard_reset_now(void)
{
        sti();
        udelay(8000);
        cli();
        prom_feval("reset");
        panic("Reboot failed!");
}
 
void show_regwindow(struct reg_window *rw)
{
        printk("l0:%08lx l1:%08lx l2:%08lx l3:%08lx l4:%08lx l5:%08lx l6:%08lx l7:%08lx\n",
               rw->locals[0], rw->locals[1], rw->locals[2], rw->locals[3],
               rw->locals[4], rw->locals[5], rw->locals[6], rw->locals[7]);
        printk("i0:%08lx i1:%08lx i2:%08lx i3:%08lx i4:%08lx i5:%08lx i6:%08lx i7:%08lx\n",
               rw->ins[0], rw->ins[1], rw->ins[2], rw->ins[3],
               rw->ins[4], rw->ins[5], rw->ins[6], rw->ins[7]);
}
 
void show_regs(struct pt_regs * regs)
{
        printk("PSR: %08lx PC: %08lx NPC: %08lx Y: %08lx\n", regs->psr,
               regs->pc, regs->npc, regs->y);
        printk("%%g0: %08lx %%g1: %08lx %%g2: %08lx %%g3: %08lx\n",
               regs->u_regs[0], regs->u_regs[1], regs->u_regs[2],
               regs->u_regs[3]);
        printk("%%g4: %08lx %%g5: %08lx %%g6: %08lx %%g7: %08lx\n",
               regs->u_regs[4], regs->u_regs[5], regs->u_regs[6],
               regs->u_regs[7]);
        printk("%%o0: %08lx %%o1: %08lx %%o2: %08lx %%o3: %08lx\n",
               regs->u_regs[8], regs->u_regs[9], regs->u_regs[10],
               regs->u_regs[11]);
        printk("%%o4: %08lx %%o5: %08lx %%sp: %08lx %%ret_pc: %08lx\n",
               regs->u_regs[12], regs->u_regs[13], regs->u_regs[14],
               regs->u_regs[15]);
}
 
/*
 * Free current thread data structures etc..
 */
void exit_thread(void)
{
        flush_user_windows();
#ifndef __SMP__
        if(last_task_used_math == current) {
#else
        if(current->flags & PF_USEDFPU) {
#endif
                /* Keep process from leaving FPU in a bogon state. */
                put_psr(get_psr() | PSR_EF);
                fpsave(&current->tss.float_regs[0], &current->tss.fsr,
                       &current->tss.fpqueue[0], &current->tss.fpqdepth);
#ifndef __SMP__
                last_task_used_math = NULL;
#else
                current->flags &= ~PF_USEDFPU;
#endif
        }
        mmu_exit_hook();
}
 
/*
 * Free old dead task when we know it can never be on the cpu again.
 */
void release_thread(struct task_struct *dead_task)
{
}
 
void flush_thread(void)
{
        /* Make sure old user windows don't get in the way. */
        flush_user_windows();
        current->tss.w_saved = 0;
        current->tss.uwinmask = 0;
        current->tss.sig_address = 0;
        current->tss.sig_desc = 0;
        current->tss.sstk_info.cur_status = 0;
        current->tss.sstk_info.the_stack = 0;
 
#ifndef __SMP__
        if(last_task_used_math == current) {
#else
        if(current->flags & PF_USEDFPU) {
#endif
                /* Clean the fpu. */
                put_psr(get_psr() | PSR_EF);
                fpsave(&current->tss.float_regs[0], &current->tss.fsr,
                       &current->tss.fpqueue[0], &current->tss.fpqdepth);
#ifndef __SMP__
                last_task_used_math = NULL;
#else
                current->flags &= ~PF_USEDFPU;
#endif
        }
 
        memset(&current->tss.reg_window[0], 0,
               (sizeof(struct reg_window) * NSWINS));
        memset(&current->tss.rwbuf_stkptrs[0], 0,
               (sizeof(unsigned long) * NSWINS));
        mmu_flush_hook();
        /* Now, this task is no longer a kernel thread. */
        current->tss.flags &= ~SPARC_FLAG_KTHREAD;
}
 
/*
 * Copy a Sparc thread.  The fork() return value conventions
 * under SunOS are nothing short of bletcherous:
 * Parent -->  %o0 == childs  pid, %o1 == 0
 * Child  -->  %o0 == parents pid, %o1 == 1
 *
 * NOTE: We have a separate fork kpsr/kwim because
 *       the parent could change these values between
 *       sys_fork invocation and when we reach here
 *       if the parent should sleep while trying to
 *       allocate the task_struct and kernel stack in
 *       do_fork().
 */
extern void ret_sys_call(void);
 
void copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
                 struct task_struct *p, struct pt_regs *regs)
{
        struct pt_regs *childregs;
        struct reg_window *old_stack, *new_stack;
        unsigned long stack_offset;
 
#ifndef __SMP__
        if(last_task_used_math == current) {
#else
        if(current->flags & PF_USEDFPU) {
#endif
                put_psr(get_psr() | PSR_EF);
                fpsave(&p->tss.float_regs[0], &p->tss.fsr,
                       &p->tss.fpqueue[0], &p->tss.fpqdepth);
#ifdef __SMP__
                current->flags &= ~PF_USEDFPU;
#endif
        }
 
        /* Calculate offset to stack_frame & pt_regs */
        if(sparc_cpu_model == sun4c)
                stack_offset = ((PAGE_SIZE*3) - TRACEREG_SZ);
        else
                stack_offset = ((PAGE_SIZE<<2) - TRACEREG_SZ);
 
        if(regs->psr & PSR_PS)
                stack_offset -= REGWIN_SZ;
        childregs = ((struct pt_regs *) (p->kernel_stack_page + stack_offset));
        *childregs = *regs;
        new_stack = (((struct reg_window *) childregs) - 1);
        old_stack = (((struct reg_window *) regs) - 1);
        *new_stack = *old_stack;
        p->tss.ksp = p->saved_kernel_stack = (unsigned long) new_stack;
        p->tss.kpc = (((unsigned long) ret_sys_call) - 0x8);
        p->tss.kpsr = current->tss.fork_kpsr;
        p->tss.kwim = current->tss.fork_kwim;
        p->tss.kregs = childregs;
        childregs->u_regs[UREG_FP] = sp;
 
        if(regs->psr & PSR_PS) {
                stack_offset += TRACEREG_SZ;
                childregs->u_regs[UREG_FP] = p->kernel_stack_page + stack_offset;
                p->tss.flags |= SPARC_FLAG_KTHREAD;
        } else
                p->tss.flags &= ~SPARC_FLAG_KTHREAD;
 
        /* Set the return value for the child. */
        childregs->u_regs[UREG_I0] = current->pid;
        childregs->u_regs[UREG_I1] = 1;
 
        /* Set the return value for the parent. */
        regs->u_regs[UREG_I1] = 0;
}
 
/*
 * fill in the user structure for a core dump..
 */
void dump_thread(struct pt_regs * regs, struct user * dump)
{
        unsigned long first_stack_page;
 
        dump->magic = SUNOS_CORE_MAGIC;
        dump->len = sizeof(struct user);
        dump->regs.psr = regs->psr;
        dump->regs.pc = regs->pc;
        dump->regs.npc = regs->npc;
        dump->regs.y = regs->y;
        /* fuck me plenty */
        memcpy(&dump->regs.regs[0], &regs->u_regs[1], (sizeof(unsigned long) * 15));
        dump->uexec = current->tss.core_exec;
        dump->u_tsize = (((unsigned long) current->mm->end_code) -
                ((unsigned long) current->mm->start_code)) & ~(PAGE_SIZE - 1);
        dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1)));
        dump->u_dsize -= dump->u_tsize;
        dump->u_dsize &= ~(PAGE_SIZE - 1);
        first_stack_page = (regs->u_regs[UREG_FP] & ~(PAGE_SIZE - 1));
        dump->u_ssize = (TASK_SIZE - first_stack_page) & ~(PAGE_SIZE - 1);
        memcpy(&dump->fpu.fpstatus.fregs.regs[0], &current->tss.float_regs[0], (sizeof(unsigned long) * 32));
        dump->fpu.fpstatus.fsr = current->tss.fsr;
        dump->fpu.fpstatus.flags = dump->fpu.fpstatus.extra = 0;
        dump->fpu.fpstatus.fpq_count = current->tss.fpqdepth;
        memcpy(&dump->fpu.fpstatus.fpq[0], &current->tss.fpqueue[0],
               ((sizeof(unsigned long) * 2) * 16));
        dump->sigcode = current->tss.sig_desc;
}
 
/*
 * fill in the fpu structure for a core dump.
 */
int dump_fpu (void *fpu_structure)
{
        /* Currently we report that we couldn't dump the fpu structure */
        return 0;
}
 
/*
 * sparc_execve() executes a new program after the asm stub has set
 * things up for us.  This should basically do what I want it to.
 */
asmlinkage int sparc_execve(struct pt_regs *regs)
{
        int error;
        char *filename;
 
        flush_user_windows();
        error = getname((char *) regs->u_regs[UREG_I0], &filename);
        if(error)
                return error;
        error = do_execve(filename, (char **) regs->u_regs[UREG_I1],
                          (char **) regs->u_regs[UREG_I2], regs);
        putname(filename);
        return error;
}

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [sparc/] [kernel/] [process.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1624	jcastillo	`/* $Id: process.c,v 1.1 2005-12-20 09:50:43 jcastillo Exp $`
2			`* linux/arch/sparc/kernel/process.c`
3			`*`
4			`* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)`
5			`*/`
6
7			`/*`
8			`* This file handles the architecture-dependent parts of process handling..`
9			`*/`
10
11			`#define __KERNEL_SYSCALLS__`
12			`#include <stdarg.h>`
13
14			`#include <linux/errno.h>`
15			`#include <linux/sched.h>`
16			`#include <linux/kernel.h>`
17			`#include <linux/mm.h>`
18			`#include <linux/stddef.h>`
19			`#include <linux/unistd.h>`
20			`#include <linux/ptrace.h>`
21			`#include <linux/malloc.h>`
22			`#include <linux/ldt.h>`
23			`#include <linux/user.h>`
24			`#include <linux/a.out.h>`
25
26			`#include <asm/auxio.h>`
27			`#include <asm/oplib.h>`
28			`#include <asm/segment.h>`
29			`#include <asm/system.h>`
30			`#include <asm/page.h>`
31			`#include <asm/pgtable.h>`
32			`#include <asm/delay.h>`
33			`#include <asm/processor.h>`
34			`#include <asm/psr.h>`
35			`#include <asm/system.h>`
36
37			`extern void fpsave(unsigned long , unsigned long , void , unsigned long );`
38
39			`int active_ds = USER_DS;`
40
41			`#ifndef __SMP__`
42
43			`/*`
44			`* the idle loop on a Sparc... ;)`
45			`*/`
46			`asmlinkage int sys_idle(void)`
47			`{`
48			`if (current->pid != 0)`
49			`return -EPERM;`
50
51			`/* endless idle loop with no priority at all */`
52			`current->counter = -100;`
53			`for (;;) {`
54			`schedule();`
55			`}`
56			`return 0;`
57			`}`
58
59			`#else`
60
61			`/*`
62			`* the idle loop on a SparcMultiPenguin...`
63			`*/`
64			`asmlinkage int sys_idle(void)`
65			`{`
66			`if (current->pid != 0)`
67			`return -EPERM;`
68
69			`/* endless idle loop with no priority at all */`
70			`current->counter = -100;`
71			`schedule();`
72			`return 0;`
73			`}`
74
75			`/* This is being executed in task 0 'user space'. */`
76			`int cpu_idle(void *unused)`
77			`{`
78			`volatile int *spap = &smp_process_available;`
79			`volatile int cval;`
80
81			`while(1) {`
82			`if(0==read_smp_counter(spap))`
83			`continue;`
84			`cli();`
85			`/* Acquire exclusive access. */`
86			`while((cval = smp_swap(spap, -1)) == -1)`
87			`;`
88			`if (0==cval) {`
89			`/* ho hum, release it. */`
90			`smp_process_available = 0;`
91			`sti();`
92			`continue;`
93			`}`
94			`/* Something interesting happened, whee... */`
95			`smp_swap(spap, (cval - 1));`
96			`sti();`
97			`idle();`
98			`}`
99			`}`
100
101			`#endif`
102
103			`extern char saved_command_line[];`
104
105			`void hard_reset_now(void)`
106			`{`
107			`sti();`
108			`udelay(8000);`
109			`cli();`
110			`prom_feval("reset");`
111			`panic("Reboot failed!");`
112			`}`
113
114			`void show_regwindow(struct reg_window *rw)`
115			`{`
116			`printk("l0:%08lx l1:%08lx l2:%08lx l3:%08lx l4:%08lx l5:%08lx l6:%08lx l7:%08lx\n",`
117			`rw->locals[0], rw->locals[1], rw->locals[2], rw->locals[3],`
118			`rw->locals[4], rw->locals[5], rw->locals[6], rw->locals[7]);`
119			`printk("i0:%08lx i1:%08lx i2:%08lx i3:%08lx i4:%08lx i5:%08lx i6:%08lx i7:%08lx\n",`
120			`rw->ins[0], rw->ins[1], rw->ins[2], rw->ins[3],`
121			`rw->ins[4], rw->ins[5], rw->ins[6], rw->ins[7]);`
122			`}`
123
124			`void show_regs(struct pt_regs * regs)`
125			`{`
126			`printk("PSR: %08lx PC: %08lx NPC: %08lx Y: %08lx\n", regs->psr,`
127			`regs->pc, regs->npc, regs->y);`
128			`printk("%%g0: %08lx %%g1: %08lx %%g2: %08lx %%g3: %08lx\n",`
129			`regs->u_regs[0], regs->u_regs[1], regs->u_regs[2],`
130			`regs->u_regs[3]);`
131			`printk("%%g4: %08lx %%g5: %08lx %%g6: %08lx %%g7: %08lx\n",`
132			`regs->u_regs[4], regs->u_regs[5], regs->u_regs[6],`
133			`regs->u_regs[7]);`
134			`printk("%%o0: %08lx %%o1: %08lx %%o2: %08lx %%o3: %08lx\n",`
135			`regs->u_regs[8], regs->u_regs[9], regs->u_regs[10],`
136			`regs->u_regs[11]);`
137			`printk("%%o4: %08lx %%o5: %08lx %%sp: %08lx %%ret_pc: %08lx\n",`
138			`regs->u_regs[12], regs->u_regs[13], regs->u_regs[14],`
139			`regs->u_regs[15]);`
140			`}`
141
142			`/*`
143			`* Free current thread data structures etc..`
144			`*/`
145			`void exit_thread(void)`
146			`{`
147			`flush_user_windows();`
148			`#ifndef __SMP__`
149			`if(last_task_used_math == current) {`
150			`#else`
151			`if(current->flags & PF_USEDFPU) {`
152			`#endif`
153			`/* Keep process from leaving FPU in a bogon state. */`
154			`put_psr(get_psr() \| PSR_EF);`
155			`fpsave(&current->tss.float_regs[0], &current->tss.fsr,`
156			`&current->tss.fpqueue[0], &current->tss.fpqdepth);`
157			`#ifndef __SMP__`
158			`last_task_used_math = NULL;`
159			`#else`
160			`current->flags &= ~PF_USEDFPU;`
161			`#endif`
162			`}`
163			`mmu_exit_hook();`
164			`}`
165
166			`/*`
167			`* Free old dead task when we know it can never be on the cpu again.`
168			`*/`
169			`void release_thread(struct task_struct *dead_task)`
170			`{`
171			`}`
172
173			`void flush_thread(void)`
174			`{`
175			`/* Make sure old user windows don't get in the way. */`
176			`flush_user_windows();`
177			`current->tss.w_saved = 0;`
178			`current->tss.uwinmask = 0;`
179			`current->tss.sig_address = 0;`
180			`current->tss.sig_desc = 0;`
181			`current->tss.sstk_info.cur_status = 0;`
182			`current->tss.sstk_info.the_stack = 0;`
183
184			`#ifndef __SMP__`
185			`if(last_task_used_math == current) {`
186			`#else`
187			`if(current->flags & PF_USEDFPU) {`
188			`#endif`
189			`/* Clean the fpu. */`
190			`put_psr(get_psr() \| PSR_EF);`
191			`fpsave(&current->tss.float_regs[0], &current->tss.fsr,`
192			`&current->tss.fpqueue[0], &current->tss.fpqdepth);`
193			`#ifndef __SMP__`
194			`last_task_used_math = NULL;`
195			`#else`
196			`current->flags &= ~PF_USEDFPU;`
197			`#endif`
198			`}`
199
200			`memset(&current->tss.reg_window[0], 0,`
201			`(sizeof(struct reg_window) * NSWINS));`
202			`memset(&current->tss.rwbuf_stkptrs[0], 0,`
203			`(sizeof(unsigned long) * NSWINS));`
204			`mmu_flush_hook();`
205			`/* Now, this task is no longer a kernel thread. */`
206			`current->tss.flags &= ~SPARC_FLAG_KTHREAD;`
207			`}`
208
209			`/*`
210			`* Copy a Sparc thread. The fork() return value conventions`
211			`* under SunOS are nothing short of bletcherous:`
212			`* Parent --> %o0 == childs pid, %o1 == 0`
213			`* Child --> %o0 == parents pid, %o1 == 1`
214			`*`
215			`* NOTE: We have a separate fork kpsr/kwim because`
216			`* the parent could change these values between`
217			`* sys_fork invocation and when we reach here`
218			`* if the parent should sleep while trying to`
219			`* allocate the task_struct and kernel stack in`
220			`* do_fork().`
221			`*/`
222			`extern void ret_sys_call(void);`
223
224			`void copy_thread(int nr, unsigned long clone_flags, unsigned long sp,`
225			`struct task_struct p, struct pt_regs regs)`
226			`{`
227			`struct pt_regs *childregs;`
228			`struct reg_window old_stack, new_stack;`
229			`unsigned long stack_offset;`
230
231			`#ifndef __SMP__`
232			`if(last_task_used_math == current) {`
233			`#else`
234			`if(current->flags & PF_USEDFPU) {`
235			`#endif`
236			`put_psr(get_psr() \| PSR_EF);`
237			`fpsave(&p->tss.float_regs[0], &p->tss.fsr,`
238			`&p->tss.fpqueue[0], &p->tss.fpqdepth);`
239			`#ifdef __SMP__`
240			`current->flags &= ~PF_USEDFPU;`
241			`#endif`
242			`}`
243
244			`/* Calculate offset to stack_frame & pt_regs */`
245			`if(sparc_cpu_model == sun4c)`
246			`stack_offset = ((PAGE_SIZE*3) - TRACEREG_SZ);`
247			`else`
248			`stack_offset = ((PAGE_SIZE<<2) - TRACEREG_SZ);`
249
250			`if(regs->psr & PSR_PS)`
251			`stack_offset -= REGWIN_SZ;`
252			`childregs = ((struct pt_regs *) (p->kernel_stack_page + stack_offset));`
253			`childregs = regs;`
254			`new_stack = (((struct reg_window *) childregs) - 1);`
255			`old_stack = (((struct reg_window *) regs) - 1);`
256			`new_stack = old_stack;`
257			`p->tss.ksp = p->saved_kernel_stack = (unsigned long) new_stack;`
258			`p->tss.kpc = (((unsigned long) ret_sys_call) - 0x8);`
259			`p->tss.kpsr = current->tss.fork_kpsr;`
260			`p->tss.kwim = current->tss.fork_kwim;`
261			`p->tss.kregs = childregs;`
262			`childregs->u_regs[UREG_FP] = sp;`
263
264			`if(regs->psr & PSR_PS) {`
265			`stack_offset += TRACEREG_SZ;`
266			`childregs->u_regs[UREG_FP] = p->kernel_stack_page + stack_offset;`
267			`p->tss.flags \|= SPARC_FLAG_KTHREAD;`
268			`} else`
269			`p->tss.flags &= ~SPARC_FLAG_KTHREAD;`
270
271			`/* Set the return value for the child. */`
272			`childregs->u_regs[UREG_I0] = current->pid;`
273			`childregs->u_regs[UREG_I1] = 1;`
274
275			`/* Set the return value for the parent. */`
276			`regs->u_regs[UREG_I1] = 0;`
277			`}`
278
279			`/*`
280			`* fill in the user structure for a core dump..`
281			`*/`
282			`void dump_thread(struct pt_regs * regs, struct user * dump)`
283			`{`
284			`unsigned long first_stack_page;`
285
286			`dump->magic = SUNOS_CORE_MAGIC;`
287			`dump->len = sizeof(struct user);`
288			`dump->regs.psr = regs->psr;`
289			`dump->regs.pc = regs->pc;`
290			`dump->regs.npc = regs->npc;`
291			`dump->regs.y = regs->y;`
292			`/* fuck me plenty */`
293			`memcpy(&dump->regs.regs[0], &regs->u_regs[1], (sizeof(unsigned long) * 15));`
294			`dump->uexec = current->tss.core_exec;`
295			`dump->u_tsize = (((unsigned long) current->mm->end_code) -`
296			`((unsigned long) current->mm->start_code)) & ~(PAGE_SIZE - 1);`
297			`dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1)));`
298			`dump->u_dsize -= dump->u_tsize;`
299			`dump->u_dsize &= ~(PAGE_SIZE - 1);`
300			`first_stack_page = (regs->u_regs[UREG_FP] & ~(PAGE_SIZE - 1));`
301			`dump->u_ssize = (TASK_SIZE - first_stack_page) & ~(PAGE_SIZE - 1);`
302			`memcpy(&dump->fpu.fpstatus.fregs.regs[0], &current->tss.float_regs[0], (sizeof(unsigned long) * 32));`
303			`dump->fpu.fpstatus.fsr = current->tss.fsr;`
304			`dump->fpu.fpstatus.flags = dump->fpu.fpstatus.extra = 0;`
305			`dump->fpu.fpstatus.fpq_count = current->tss.fpqdepth;`
306			`memcpy(&dump->fpu.fpstatus.fpq[0], &current->tss.fpqueue[0],`
307			`((sizeof(unsigned long) * 2) * 16));`
308			`dump->sigcode = current->tss.sig_desc;`
309			`}`
310
311			`/*`
312			`* fill in the fpu structure for a core dump.`
313			`*/`
314			`int dump_fpu (void *fpu_structure)`
315			`{`
316			`/* Currently we report that we couldn't dump the fpu structure */`
317			`return 0;`
318			`}`
319
320			`/*`
321			`* sparc_execve() executes a new program after the asm stub has set`
322			`* things up for us. This should basically do what I want it to.`
323			`*/`
324			`asmlinkage int sparc_execve(struct pt_regs *regs)`
325			`{`
326			`int error;`
327			`char *filename;`
328
329			`flush_user_windows();`
330			`error = getname((char *) regs->u_regs[UREG_I0], &filename);`
331			`if(error)`
332			`return error;`
333			`error = do_execve(filename, (char **) regs->u_regs[UREG_I1],`
334			`(char **) regs->u_regs[UREG_I2], regs);`
335			`putname(filename);`
336			`return error;`
337			`}`