1 files changed, 77 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_arm.S b/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_arm.S
new file mode 100644
index 00000000000..4e2f9912c95
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_arm.S
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013 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
+#ifdef __thumb__
+/* In THUMB Mode jump to ARM stub via bx to ensure CPU mode switch.
+ * FIXME: This trampoline is provided to workaround bugs in
+ * the THUMB/ARM interworking that appear in the component build.
+ * When these issues are resolved this stub can be removed.
+ */
+.align 2
+.code 16
+.thumb_func
+pushAllRegisters:
+        adr r3, pushAllRegistersARM
+        bx r3
+
+.type pushAllRegistersARM, %function
+.hidden pushAllRegistersARM
+.align 4
+.code 32
+pushAllRegistersARM:
+#else
+/* ARM Mode */
+.align 4
+.code 32
+pushAllRegisters:
+#endif
+        /* Push all callee-saved registers and save return address. */
+        push {r4-r11, lr}
+        /* Pass the two first arguments unchanged (r0, r1)
+         * and pass the stack pointer after pushing callee-saved
+         * registers to the callback function.
+         */
+        mov r3, r2
+        mov r2, sp
+        blx r3
+        /* Discard all the registers, and pop lr into pc which returns
+         * and switches mode if needed.
+         */
+        add sp, sp, #32
+        pop {pc}