Implement the Oilpan pushAllRegisters on MIPS64

Source/platform/heap/asm/SaveRegisters_mips64.S

Index: Source/platform/heap/asm/SaveRegisters_mips64.S
diff --git a/Source/platform/heap/asm/SaveRegisters_mips64.S b/Source/platform/heap/asm/SaveRegisters_mips64.S
new file mode 100644
index 0000000000000000000000000000000000000000..227b8a05586b7a2762c14508bf691caf563eda77
--- /dev/null
+++ b/Source/platform/heap/asm/SaveRegisters_mips64.S
@@ -0,0 +1,68 @@
+/*

[haraken, 2014/08/15 14:43:21]

Use the following 3-line copyright.

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

[petarj, 2014/08/15 14:59:54]

Done.

+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/*
+ * typedef void (*PushAllRegistersCallback)(SafePointBarrier*, ThreadState*, intptr_t*);
+ * extern "C" void pushAllRegisters(SafePointBarrier*, ThreadState*, PushAllRegistersCallback)
+ */
+
+.type pushAllRegisters, %function
+.global pushAllRegisters
+.hidden pushAllRegisters
+pushAllRegisters:
+        // Push all callee-saves registers to get them
+        // on the stack for conservative stack scanning.
+        // Reserve space for callee-saved registers and return address.
+        daddiu $sp,$sp,-80
+        // Save the callee-saved registers and the return address.
+        sd $s0,0($sp)
+        sd $s1,8($sp)
+        sd $s2,16($sp)
+        sd $s3,24($sp)
+        sd $s4,32($sp)
+        sd $s5,40($sp)
+        sd $s6,48($sp)
+        sd $s7,56($sp)
+        sd $ra,64($sp)
+        // Note: the callee-saved floating point registers do not need to be
+        // copied to the stack, because fp registers never hold heap pointers
+        // and so do not need to be kept visible to the garbage collector.
+        // Pass the two first arguments untouched in a0 and a1 and the
+        // stack pointer to the callback.
+        move $t9,$a2
+        move $a2,$sp
+        jal $t9
+        // Restore return address, adjust stack and return.
+        // Note: the copied registers do not need to be reloaded here,
+        // because they were preserved by the called routine.
+        ld $ra,64($sp)
+        daddiu $sp,$sp,80
+        jr $ra