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Diffstat (limited to 'libc/sysdeps/linux/sparc/fork.S')
-rw-r--r--libc/sysdeps/linux/sparc/fork.S46
1 files changed, 46 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc/fork.S b/libc/sysdeps/linux/sparc/fork.S
new file mode 100644
index 000000000..6bab58c81
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/fork.S
@@ -0,0 +1,46 @@
+/* Copyright (C) 1991, 92, 94, 95, 97, 99 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+.text;
+.global fork;
+.align 4;
+fork: ;
+.type fork ,@function; ;
+
+ mov 2, %g1 ;
+ ta 0x10;
+ bcc,a 9000f;
+ nop;
+ save %sp,-96,%sp;
+ call __errno_location;
+ nop;
+ st %i0,[%o0];
+ jmpl %i7+8,%g0;
+ restore %g0,-1,%o0; ;
+ 9000:;
+
+ /* %o1 is now 0 for the parent and 1 for the child. Decrement it to
+ make it -1 (all bits set) for the parent, and 0 (no bits set)
+ for the child. Then AND it with %o0, so the parent gets
+ %o0&-1==pid, and the child gets %o0&0==0. */
+ sub %o1, 1, %o1
+ retl
+ and %o0, %o1, %o0
+