diff options
Diffstat (limited to 'arch/x86/kernel/process_64.c')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 63236d8f84bf..b812cd0d7889 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -50,8 +50,6 @@ #include <asm/switch_to.h> #include <asm/xen/hypervisor.h> -asmlinkage extern void ret_from_fork(void); - __visible DEFINE_PER_CPU(unsigned long, rsp_scratch); /* Prints also some state that isn't saved in the pt_regs */ @@ -141,12 +139,17 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long sp, { int err; struct pt_regs *childregs; + struct fork_frame *fork_frame; + struct inactive_task_frame *frame; struct task_struct *me = current; p->thread.sp0 = (unsigned long)task_stack_page(p) + THREAD_SIZE; childregs = task_pt_regs(p); - p->thread.sp = (unsigned long) childregs; - set_tsk_thread_flag(p, TIF_FORK); + fork_frame = container_of(childregs, struct fork_frame, regs); + frame = &fork_frame->frame; + frame->bp = 0; + frame->ret_addr = (unsigned long) ret_from_fork; + p->thread.sp = (unsigned long) fork_frame; p->thread.io_bitmap_ptr = NULL; savesegment(gs, p->thread.gsindex); @@ -160,15 +163,11 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long sp, if (unlikely(p->flags & PF_KTHREAD)) { /* kernel thread */ memset(childregs, 0, sizeof(struct pt_regs)); - childregs->sp = (unsigned long)childregs; - childregs->ss = __KERNEL_DS; - childregs->bx = sp; /* function */ - childregs->bp = arg; - childregs->orig_ax = -1; - childregs->cs = __KERNEL_CS | get_kernel_rpl(); - childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; + frame->bx = sp; /* function */ + frame->r12 = arg; return 0; } + frame->bx = 0; *childregs = *current_pt_regs(); childregs->ax = 0; |