diff options
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 41 |
1 files changed, 9 insertions, 32 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index ba48233500f..f6d244db920 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -745,25 +745,24 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, /* Copy registers */ sp -= sizeof(struct pt_regs); childregs = (struct pt_regs *) sp; - if (!regs) { - /* for kernel thread, set `current' and stackptr in new task */ + if (unlikely(p->flags & PF_KTHREAD)) { + struct thread_info *ti = (void *)task_stack_page(p); memset(childregs, 0, sizeof(struct pt_regs)); childregs->gpr[1] = sp + sizeof(struct pt_regs); + childregs->gpr[14] = usp; /* function */ #ifdef CONFIG_PPC64 - childregs->gpr[14] = *(unsigned long *)usp; - childregs->gpr[2] = ((unsigned long *)usp)[1], clear_tsk_thread_flag(p, TIF_32BIT); -#else - childregs->gpr[14] = usp; /* function */ - childregs->gpr[2] = (unsigned long) p; + childregs->softe = 1; #endif childregs->gpr[15] = arg; p->thread.regs = NULL; /* no user register state */ + ti->flags |= _TIF_RESTOREALL; f = ret_from_kernel_thread; } else { CHECK_FULL_REGS(regs); *childregs = *regs; - childregs->gpr[1] = usp; + if (usp) + childregs->gpr[1] = usp; p->thread.regs = childregs; childregs->gpr[3] = 0; /* Result from fork() */ if (clone_flags & CLONE_SETTLS) { @@ -1027,22 +1026,11 @@ int get_unalign_ctl(struct task_struct *tsk, unsigned long adr) return put_user(tsk->thread.align_ctl, (unsigned int __user *)adr); } -#define TRUNC_PTR(x) ((typeof(x))(((unsigned long)(x)) & 0xffffffff)) - int sys_clone(unsigned long clone_flags, unsigned long usp, int __user *parent_tidp, void __user *child_threadptr, int __user *child_tidp, int p6, struct pt_regs *regs) { - CHECK_FULL_REGS(regs); - if (usp == 0) - usp = regs->gpr[1]; /* stack pointer for child */ -#ifdef CONFIG_PPC64 - if (is_32bit_task()) { - parent_tidp = TRUNC_PTR(parent_tidp); - child_tidp = TRUNC_PTR(child_tidp); - } -#endif return do_fork(clone_flags, usp, regs, 0, parent_tidp, child_tidp); } @@ -1050,28 +1038,17 @@ int sys_fork(unsigned long p1, unsigned long p2, unsigned long p3, unsigned long p4, unsigned long p5, unsigned long p6, struct pt_regs *regs) { - CHECK_FULL_REGS(regs); - return do_fork(SIGCHLD, regs->gpr[1], regs, 0, NULL, NULL); + return do_fork(SIGCHLD, 0, regs, 0, NULL, NULL); } int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3, unsigned long p4, unsigned long p5, unsigned long p6, struct pt_regs *regs) { - CHECK_FULL_REGS(regs); - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->gpr[1], + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, regs, 0, NULL, NULL); } -void __ret_from_kernel_execve(struct pt_regs *normal) -__noreturn; - -void ret_from_kernel_execve(struct pt_regs *normal) -{ - set_thread_flag(TIF_RESTOREALL); - __ret_from_kernel_execve(normal); -} - static inline int valid_irq_stack(unsigned long sp, struct task_struct *p, unsigned long nbytes) { |