1 files changed, 86 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/swapcontext.S b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/swapcontext.S
new file mode 100644
index 0000000000..a7b9fe1b02
--- /dev/null
+++ b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/swapcontext.S
@@ -0,0 +1,86 @@
+/* Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.
+
+   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>
+
+#include <ucontext_i.h>
+
+ENTRY(__swapcontext)
+
+    /* load ucp (arg) into %ecx */
+    movl 4(%esp), %ecx
+
+    /* load return address into %eax */
+    movl 0(%esp), %eax
+
+    /* push ucp, subcall number, and return address */
+    pushl %ecx; cfi_adjust_cfa_offset (4)
+    pushl $SYS_SUB_getcontext; cfi_adjust_cfa_offset (4)
+    pushl %eax; cfi_adjust_cfa_offset (4)
+
+    /* call context syscall */
+    DO_CALL(context, 2)
+
+	/* Jump if not error.  */
+	jnb 1f;
+
+	/* pop args from stack */
+	addl $12, %esp; cfi_adjust_cfa_offset (-12);
+
+	/* Jump to error label.  */
+	jmp SYSCALL_ERROR_LABEL;
+
+1:
+    /* pop args from stack */
+    addl $12, %esp; cfi_adjust_cfa_offset (-12);
+
+    /* load ucp (arg) into %ecx */
+    movl 4(%esp), %ecx
+
+    /* save %esp */
+    leal 4(%esp), %eax
+    movl %eax, oUESP(%ecx)
+
+    /* save %eip */
+    movl 0(%esp), %eax
+    movl %eax, oEIP(%ecx)
+
+    /* return 0 on success */
+    xorl %eax, %eax
+    movl %eax, oEAX(%ecx)
+
+    /* load ocp (arg 2) into %edx */
+    movl 8(%esp), %edx
+
+    /* push ucp */
+    pushl %edx; cfi_adjust_cfa_offset (4);
+
+    /* call __setcontext */
+    call __setcontext
+
+    /* pop ucp */
+    addl $4, %esp; cfi_adjust_cfa_offset (-4)
+
+    /* __setcontext sets the return (%eax) */
+L(pseudo_end):
+    ret
+
+PSEUDO_END(__swapcontext)
+
+weak_alias (__swapcontext, swapcontext)