diff options
Diffstat (limited to 'arch/sh/kernel/process_64.c')
| -rw-r--r-- | arch/sh/kernel/process_64.c | 43 |
1 files changed, 4 insertions, 39 deletions
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c index 3a0f3fd3bb5..d5c86a8a384 100644 --- a/arch/sh/kernel/process_64.c +++ b/arch/sh/kernel/process_64.c @@ -383,7 +383,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, save_fpu(current); disable_fpu(); last_task_used_math = NULL; - regs->sr |= SR_FD; + current_pt_regs()->sr |= SR_FD; } #endif /* Copy from sh version */ @@ -399,7 +399,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, p->thread.pc = (unsigned long) ret_from_kernel_thread; return 0; } - *childregs = *regs; + *childregs = *current_pt_regs(); /* * Sign extend the edited stack. @@ -407,7 +407,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, * 32-bit wide and context switch must take care * of NEFF sign extension. */ - childregs->regs[15] = neff_sign_extend(usp); + if (usp) + childregs->regs[15] = neff_sign_extend(usp); p->thread.uregs = childregs; childregs->regs[9] = 0; /* Set return value for child */ @@ -418,42 +419,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, return 0; } -asmlinkage int sys_fork(unsigned long r2, unsigned long r3, - unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs *pregs) -{ - return do_fork(SIGCHLD, pregs->regs[15], pregs, 0, 0, 0); -} - -asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, - unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs *pregs) -{ - if (!newsp) - newsp = pregs->regs[15]; - return do_fork(clone_flags, newsp, pregs, 0, 0, 0); -} - -/* - * This is trivial, and on the face of it looks like it - * could equally well be done in user mode. - * - * Not so, for quite unobvious reasons - register pressure. - * In user mode vfork() cannot have a stack frame, and if - * done by calling the "clone()" system call directly, you - * do not have enough call-clobbered registers to hold all - * the information you need. - */ -asmlinkage int sys_vfork(unsigned long r2, unsigned long r3, - unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs *pregs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, pregs->regs[15], pregs, 0, 0, 0); -} - #ifdef CONFIG_FRAME_POINTER static int in_sh64_switch_to(unsigned long pc) { |