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x86, um: 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
2012-10-22 22:34:11 -04:00
parent 71613c3b87
commit 1d4b4b2994
16 changed files with 52 additions and 117 deletions
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11
arch/x86/kernel/process_32.c
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@@ -129,7 +129,7 @@ void release_thread(struct task_struct *dead_task)
int copy_thread(unsigned long clone_flags, unsigned long sp,
unsigned long arg,
struct task_struct *p, struct pt_regs *regs)
struct task_struct *p, struct pt_regs *unused)
{
struct pt_regs *childregs = task_pt_regs(p);
struct task_struct *tsk;
@@ -138,7 +138,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
p->thread.sp = (unsigned long) childregs;
p->thread.sp0 = (unsigned long) (childregs+1);
if (unlikely(!regs)) {
if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
memset(childregs, 0, sizeof(struct pt_regs));
p->thread.ip = (unsigned long) ret_from_kernel_thread;
@@ -156,12 +156,13 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
return 0;
}
*childregs = *regs;
*childregs = *current_pt_regs();
childregs->ax = 0;
childregs->sp = sp;
if (sp)
childregs->sp = sp;
p->thread.ip = (unsigned long) ret_from_fork;
task_user_gs(p) = get_user_gs(regs);
task_user_gs(p) = get_user_gs(current_pt_regs());
p->fpu_counter = 0;
p->thread.io_bitmap_ptr = NULL;