diff options
Diffstat (limited to 'libc/sysdeps/linux/h8300/vfork.S')
| -rw-r--r-- | libc/sysdeps/linux/h8300/vfork.S | 54 |
1 files changed, 41 insertions, 13 deletions
diff --git a/libc/sysdeps/linux/h8300/vfork.S b/libc/sysdeps/linux/h8300/vfork.S index 9b65f4fe0..1c70dd2f5 100644 --- a/libc/sysdeps/linux/h8300/vfork.S +++ b/libc/sysdeps/linux/h8300/vfork.S @@ -1,10 +1,7 @@ +/* Copyright 2002, 2015 Yoshinori Sato <ysato@users.sourceforge.jp> */ #include <sys/syscall.h> -#ifndef __NR_vfork -#define __NR_vfork __NR_fork /* uClinux-2.0 only has fork which is vfork */ -#endif - #ifdef __H8300S__ .h8300s #else @@ -12,29 +9,60 @@ #endif .text .align 2 - .globl ___vfork - .hidden ___vfork - .type ___vfork,@function -___vfork: + .globl __vfork + .hidden __vfork + .type __vfork,@function +__vfork: +#ifdef __NR_vfork mov.l @sp+, er1 sub.l er0,er0 mov.b #__NR_vfork,r0l trapa #0 + mov.l #-4096, er2 cmp.l er0,er2 bcs fix_errno - jmp @er1 /* don't return, just jmp directly */ + jmp @er1 /* don't return, just jmp directly */ fix_errno: neg.l er0 -#if !defined(__PIC__) +# if !defined(__PIC__) mov.l er0,@_errno -#else +# else mov.l @(_errno@GOTOFF,er5),er2 mov.l er0,@er2 -#endif +# endif sub.l er0,er0 dec.l #1,er0 - jmp @er1 /* don't return, just jmp directly */ + jmp @er1 /* don't return, just jmp directly */ +#else + mov.l @sp+,er2 /* er2 = return address */ + mov.l #vfork_args,er1 + sub.l er0,er0 + mov.b #__NR_clone,r0l + trapa #0 + mov.l #-4096,er1 + cmp.l er0,er1 + bcc done + neg.l er0 +# if !defined(__PIC__) + mov.l er0,@errno +# else + mov.l @(errno@GOTOFF,er5),er1 + mov.l er0,@er1 +# endif + sub.l er0,er0 + dec.l #1,er0 +done: + jmp @er2 + +vfork_args: + .long 0x80004100 /* CLONE_VFORK | CLONE_VM | SIGCHLD */ + .long 0 + .long 0 + .long 0 + .long 0 +#endif weak_alias(__vfork,vfork) libc_hidden_def(vfork) + .end |