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h8300: switch to generic fork/vfork/clone

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-10-27 00:07:24 -04:00
parent e9eac30418
commit 3416e8098a
3 changed files with 6 additions and 44 deletions
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38
arch/h8300/kernel/process.c
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@@ -127,40 +127,9 @@ void flush_thread(void)
{
}
/*
* "h8300_fork()".. By the time we get here, the
* non-volatile registers have also been saved on the
* stack. We do some ugly pointer stuff here.. (see
* also copy_thread)
*/
asmlinkage int h8300_fork(struct pt_regs *regs)
{
return -EINVAL;
}
asmlinkage int h8300_vfork(struct pt_regs *regs)
{
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL);
}
asmlinkage int h8300_clone(struct pt_regs *regs)
{
unsigned long clone_flags;
unsigned long newsp;
/* syscall2 puts clone_flags in er1 and usp in er2 */
clone_flags = regs->er1;
newsp = regs->er2;
if (!newsp)
newsp = rdusp();
return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
}
int copy_thread(unsigned long clone_flags,
unsigned long usp, unsigned long topstk,
struct task_struct * p, struct pt_regs * regs)
struct task_struct * p, struct pt_regs *unused)
{
struct pt_regs * childregs;
@@ -173,11 +142,10 @@ int copy_thread(unsigned long clone_flags,
childregs->er5 = usp; /* fn */
p->thread.ksp = (unsigned long)childregs;
}
*childregs = *regs;
*childregs = *current_pt_regs();
childregs->retpc = (unsigned long) ret_from_fork;
childregs->er0 = 0;
p->thread.usp = usp;
p->thread.usp = usp ?: rdusp();
p->thread.ksp = (unsigned long)childregs;
return 0;