int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
- int pid;
memset(®s, 0, sizeof(regs));
regs.regs[2] = (unsigned long)arg;
regs.sr = (1 << 30);
/* Ok, create the new process.. */
- pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
®s, 0, NULL, NULL);
-
- trace_mark(kernel_arch_kthread_create, "pid %d fn %p", pid, fn);
-
- return pid;
}
+EXPORT_SYMBOL(kernel_thread);
/*
* Free current thread data structures etc..
if (fpvalid) {
if (current == last_task_used_math) {
enable_fpu();
- save_fpu(tsk, regs);
+ save_fpu(tsk);
disable_fpu();
last_task_used_math = 0;
regs->sr |= SR_FD;
return 0; /* Task didn't use the fpu at all. */
#endif
}
+EXPORT_SYMBOL(dump_fpu);
asmlinkage void ret_from_fork(void);
-int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
+int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused,
struct task_struct *p, struct pt_regs *regs)
{
struct pt_regs *childregs;
- unsigned long long se; /* Sign extension */
#ifdef CONFIG_SH_FPU
if(last_task_used_math == current) {
enable_fpu();
- save_fpu(current, regs);
+ save_fpu(current);
disable_fpu();
last_task_used_math = NULL;
regs->sr |= SR_FD;
*childregs = *regs;
+ /*
+ * Sign extend the edited stack.
+ * Note that thread.pc and thread.pc will stay
+ * 32-bit wide and context switch must take care
+ * of NEFF sign extension.
+ */
if (user_mode(regs)) {
- childregs->regs[15] = usp;
+ childregs->regs[15] = neff_sign_extend(usp);
p->thread.uregs = childregs;
} else {
- childregs->regs[15] = (unsigned long)task_stack_page(p) + THREAD_SIZE;
+ childregs->regs[15] =
+ neff_sign_extend((unsigned long)task_stack_page(p) +
+ THREAD_SIZE);
}
childregs->regs[9] = 0; /* Set return value for child */
p->thread.sp = (unsigned long) childregs;
p->thread.pc = (unsigned long) ret_from_fork;
- /*
- * Sign extend the edited stack.
- * Note that thread.pc and thread.pc will stay
- * 32-bit wide and context switch must take care
- * of NEFF sign extension.
- */
-
- se = childregs->regs[15];
- se = (se & NEFF_SIGN) ? (se | NEFF_MASK) : se;
- childregs->regs[15] = se;
-
return 0;
}
(char __user * __user *)uargv,
(char __user * __user *)uenvp,
pregs);
- if (error == 0) {
- task_lock(current);
- current->ptrace &= ~PT_DTRACE;
- task_unlock(current);
- }
putname(filename);
out:
return error;