diff options
| author | Thorsten Glaser <tg@mirbsd.org> | 2011-03-26 15:11:51 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2011-03-26 23:50:49 -0400 |
| commit | 9b5df2295b4a3cfc63a15b6490f2b61dcf7c1be9 (patch) | |
| tree | 0612cb24c1d56092bc5d0bafc1687354f173b12e | |
| parent | 251f2266bf24b1b396f59eef60d0acf41fdd02e4 (diff) | |
cris: add provide arch-specific vfork implementation
vfork must be called with nothing at all on the stack,
so implementing it via syscall() does not work.
Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| -rw-r--r-- | libc/sysdeps/linux/cris/Makefile.arch | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/cris/vfork.S | 30 |
2 files changed, 31 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/cris/Makefile.arch b/libc/sysdeps/linux/cris/Makefile.arch index 43e191205..8a682b0b6 100644 --- a/libc/sysdeps/linux/cris/Makefile.arch +++ b/libc/sysdeps/linux/cris/Makefile.arch @@ -7,7 +7,7 @@ CSRC := __init_brk.c brk.c sbrk.c -SSRC := setjmp.S __longjmp.S clone.S sysdep.S syscall.S +SSRC := setjmp.S __longjmp.S clone.S sysdep.S syscall.S vfork.S ifeq ($(UNIFIED_SYSCALL),y) SSRC += __uClibc_syscall.S endif diff --git a/libc/sysdeps/linux/cris/vfork.S b/libc/sysdeps/linux/cris/vfork.S new file mode 100644 index 000000000..ea8a81d82 --- /dev/null +++ b/libc/sysdeps/linux/cris/vfork.S @@ -0,0 +1,30 @@ +/*- + * Copyright (c) 2011 + * Thorsten Glaser <tg@freewrt.org> + * + * This file is available either under the terms and conditions of + * the MirOS Licence, or the same terms as klibc or uClibc. + */ + +#include "sysdep.h" + + .syntax no_register_prefix + +/* + * vfork is special, but PSEUDO() would probably work were it not broken; + * there must be nothing at all on the stack above the stack frame of the + * enclosing function + */ + +ENTRY(__vfork) + movu.w __NR_vfork,$r9 + break 13 + cmps.w -4096,$r10 + bhs 0f + nop + Ret + nop +PSEUDO_END(__vfork) + +weak_alias(__vfork,vfork) +libc_hidden_weak(vfork) |