1 /* 2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2007, 2008, 2009 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_ZERO_ASSEMBLER_ZERO_HPP 27 #define CPU_ZERO_ASSEMBLER_ZERO_HPP 28 29 // In normal, CPU-specific ports of HotSpot these two classes are used 30 // for generating assembly language. We don't do any of this in zero, 31 // of course, but we do sneak entry points around in CodeBuffers so we 32 // generate those here. 33 34 class Assembler : public AbstractAssembler { 35 public: 36 Assembler(CodeBuffer* code) : AbstractAssembler(code) {} 37 38 public: 39 void pd_patch_instruction(address branch, address target, const char* file, int line); 40 41 //---< calculate length of instruction >--- 42 static unsigned int instr_len(unsigned char *instr) { return 1; } 43 44 //---< longest instructions >--- 45 static unsigned int instr_maxlen() { return 1; } 46 }; 47 48 class MacroAssembler : public Assembler { 49 public: 50 MacroAssembler(CodeBuffer* code) : Assembler(code) {} 51 52 public: 53 void align(int modulus); 54 void bang_stack_with_offset(int offset); 55 bool needs_explicit_null_check(intptr_t offset); 56 bool uses_implicit_null_check(void* address); 57 RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr, 58 Register tmp, int offset); 59 public: 60 void advance(int bytes); 61 void store_oop(jobject obj); 62 void store_Metadata(Metadata* obj); 63 }; 64 65 address ShouldNotCallThisStub(); 66 address ShouldNotCallThisEntry(); 67 68 #endif // CPU_ZERO_ASSEMBLER_ZERO_HPP