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-rw-r--r--sysdeps/unix/sysv/linux/sparc/sparc64/clone.S89
1 files changed, 89 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S
new file mode 100644
index 0000000000..a5cb1a4c4a
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+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S
@@ -0,0 +1,89 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+ Contributed by Richard Henderson (rth@tamu.edu).
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <asm/errno.h>
+#include <asm/unistd.h>
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+ .text
+ .align 4
+ .globl __libc_clone
+ .type __libc_clone,@function
+ .weak clone
+ __clone = __libc_clone
+ clone = __libc_clone
+
+__libc_clone:
+ save %sp,-160,%sp
+
+ /* sanity check arguments */
+ brz,pn %i0, 99f
+ mov %i0, %l0 /* save fn */
+ brz,pn %i1, 99f
+ mov %i3, %l3 /* save arg */
+
+ /* Do the system call */
+ mov %i1, %o1
+ mov %i2, %o0
+ set __NR_clone, %g1
+ ta 0x11
+ bcs,pn %xcc, 99f
+ nop
+ brnz %o0, __thread_start
+ mov %o0, %i0
+ ret
+ restore
+99:
+#ifdef PIC
+ call 1f
+ sethi %hi(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
+1: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
+ add %l7, %o7, %l7
+ set EINVAL, %i0
+ sethi %hi(errno), %g2
+ or %g2, %lo(errno), %g2
+ st %i0, [%l7+%g2]
+#else
+ sethi %hi(errno), %g2
+ add %g2, %g4, %g2
+ set EINVAL, %i0
+ st %i0, [%g2+%lo(errno)]
+#endif
+#ifdef _LIBC_REENTRANT
+ call __errno_location
+ nop
+ st %i0, [%o0]
+#endif
+ mov -1,%i0
+ ret
+ restore
+ .size __libc_clone, .-__libc_clone
+
+ .type __thread_start,@function
+__thread_start:
+ mov %g0, %fp /* terminate backtrace */
+ sub %sp, 6*8, %sp /* provide arg storage */
+ call %l0
+ mov %l3,%o0
+ call _exit,0
+ nop
+ .size __thread_start, .-__thread_start