--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/arm/vm/macroAssembler_arm.inline.hpp Mon Dec 19 12:39:01 2016 -0500
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_ARM_VM_MACROASSEMBLER_ARM_INLINE_HPP
+#define CPU_ARM_VM_MACROASSEMBLER_ARM_INLINE_HPP
+
+#include "asm/assembler.inline.hpp"
+#include "asm/codeBuffer.hpp"
+#include "code/codeCache.hpp"
+#include "runtime/handles.inline.hpp"
+
+inline void MacroAssembler::pd_patch_instruction(address branch, address target) {
+ int instr = *(int*)branch;
+ int new_offset = (int)(target - branch NOT_AARCH64(- 8));
+ assert((new_offset & 3) == 0, "bad alignment");
+
+#ifdef AARCH64
+ if ((instr & (0x1f << 26)) == (0b00101 << 26)) {
+ // Unconditional B or BL
+ assert (is_offset_in_range(new_offset, 26), "offset is too large");
+ *(int*)branch = (instr & ~right_n_bits(26)) | encode_offset(new_offset, 26, 0);
+ } else if ((instr & (0xff << 24)) == (0b01010100 << 24) && (instr & (1 << 4)) == 0) {
+ // Conditional B
+ assert (is_offset_in_range(new_offset, 19), "offset is too large");
+ *(int*)branch = (instr & ~(right_n_bits(19) << 5)) | encode_offset(new_offset, 19, 5);
+ } else if ((instr & (0b111111 << 25)) == (0b011010 << 25)) {
+ // Compare & branch CBZ/CBNZ
+ assert (is_offset_in_range(new_offset, 19), "offset is too large");
+ *(int*)branch = (instr & ~(right_n_bits(19) << 5)) | encode_offset(new_offset, 19, 5);
+ } else if ((instr & (0b111111 << 25)) == (0b011011 << 25)) {
+ // Test & branch TBZ/TBNZ
+ assert (is_offset_in_range(new_offset, 14), "offset is too large");
+ *(int*)branch = (instr & ~(right_n_bits(14) << 5)) | encode_offset(new_offset, 14, 5);
+ } else if ((instr & (0b111011 << 24)) == (0b011000 << 24)) {
+ // LDR (literal)
+ unsigned opc = ((unsigned)instr >> 30);
+ assert (opc != 0b01 || ((uintx)target & 7) == 0, "ldr target should be aligned");
+ assert (is_offset_in_range(new_offset, 19), "offset is too large");
+ *(int*)branch = (instr & ~(right_n_bits(19) << 5)) | encode_offset(new_offset, 19, 5);
+ } else if (((instr & (1 << 31)) == 0) && ((instr & (0b11111 << 24)) == (0b10000 << 24))) {
+ // ADR
+ assert (is_imm_in_range(new_offset, 21, 0), "offset is too large");
+ instr = (instr & ~(right_n_bits(2) << 29)) | (new_offset & 3) << 29;
+ *(int*)branch = (instr & ~(right_n_bits(19) << 5)) | encode_imm(new_offset >> 2, 19, 0, 5);
+ } else if((unsigned int)instr == address_placeholder_instruction) {
+ // address
+ assert (*(unsigned int *)(branch + InstructionSize) == address_placeholder_instruction, "address placeholder occupies two instructions");
+ *(intx*)branch = (intx)target;
+ } else {
+ ::tty->print_cr("=============== instruction: 0x%x ================\n", instr);
+ Unimplemented(); // TODO-AARCH64
+ }
+#else
+ if ((instr & 0x0e000000) == 0x0a000000) {
+ // B or BL instruction
+ assert(new_offset < 0x2000000 && new_offset > -0x2000000, "encoding constraint");
+ *(int*)branch = (instr & 0xff000000) | ((unsigned int)new_offset << 6 >> 8);
+ } else if((unsigned int)instr == address_placeholder_instruction) {
+ // address
+ *(int*)branch = (int)target;
+ } else if ((instr & 0x0fff0000) == 0x028f0000 || ((instr & 0x0fff0000) == 0x024f0000)) {
+ // ADR
+ int encoding = 0x8 << 20; // ADD
+ if (new_offset < 0) {
+ encoding = 0x4 << 20; // SUB
+ new_offset = -new_offset;
+ }
+ AsmOperand o(new_offset);
+ *(int*)branch = (instr & 0xff0ff000) | encoding | o.encoding();
+ } else {
+ // LDR Rd, [PC, offset] instruction
+ assert((instr & 0x0f7f0000) == 0x051f0000, "Must be ldr_literal");
+ assert(new_offset < 4096 && new_offset > -4096, "encoding constraint");
+ if (new_offset >= 0) {
+ *(int*)branch = (instr & 0xff0ff000) | 9 << 20 | new_offset;
+ } else {
+ *(int*)branch = (instr & 0xff0ff000) | 1 << 20 | -new_offset;
+ }
+ }
+#endif // AARCH64
+}
+
+#endif // CPU_ARM_VM_MACROASSEMBLER_ARM_INLINE_HPP