Imported Evan's Simple Assembler.

Author: Evan Phoenix

vm/assembler/Makefile

@@ -0,0 +1,43 @@
+INCLUDES=-I. -Iudis86-1.7
+
+default: test
+
+libudis86.a:
+(cd udis86-1.7; ./configure && make && cp libudis86/.libs/libudis86.a ../)
+
+example/codegen: example/codegen.o libudis86.a
+g++ -ggdb3 -Wall $(INCLUDES) -o example/codegen libudis86.a example/codegen.o
+
+example/codegen.o: codegen.cpp assembler_x86.hpp
+g++ -ggdb3 $(INCLUDES) -o example/codegen.o -c example/codegen.cpp
+
+example/vm.o: example/vm.cpp assembler_x86.hpp
+g++ -ggdb3 -O2 $(INCLUDES) -o example/vm.o -c example/vm.cpp
+
+example/vm: example/vm.o example/vm-main.cpp
+g++ -ggdb3 -O2 $(INCLUDES) -o example/vm-main.o -c example/vm-main.cpp
+g++ -ggdb3 -O2 -Wall $(INCLUDES) -o example/vm libudis86.a example/vm.o example/vm-main.o
+
+test/test32: test/test32.o
+g++ -ggdb3 -Wall $(INCLUDES) -o test/test32 libudis86.a test/test32.o
+
+test/test32.o: test/test32.cpp assembler_x86.hpp
+g++ -ggdb3 $(INCLUDES) -o test/test32.o -c test/test32.cpp
+
+test/test64: test/test64.o
+g++ -ggdb3 -Wall $(INCLUDES) -o test/test64 libudis86.a test/test64.o
+
+test/test64.o: test/test64.cpp assembler_x8664.hpp
+g++ -ggdb3 $(INCLUDES) -o test/test64.o -c test/test64.cpp
+
+test: test/test32 test/test64
+@echo "---- 32 bit" && ./test/test32 && echo "---- 64 bit" && ./test/test64
+
+clean:
+rm -f test/*.o test/test32 test/test64 example/*.o example/codegen example/vm
+
+distclean: clean
+rm -f libudis86.a
+cd udis86-1.7; make distclean || true
+
+.PHONY: test

vm/assembler/assembler.hpp

@@ -0,0 +1,51 @@
+#include <stdint.h>
+
+namespace assembler {
+ class Assembler {
+ protected:
+ uint8_t* buffer_;
+ uint8_t* pc_;
+
+ void emit(uint8_t val) {
+ *reinterpret_cast<uint8_t*>(pc_) = val;
+ pc_ += 1;
+ }
+
+ void emit_s(uint16_t val) {
+ *reinterpret_cast<uint16_t*>(pc_) = val;
+ pc_ += 2;
+ }
+
+ void emit_w(uint32_t val) {
+ *reinterpret_cast<uint32_t*>(pc_) = val;
+ pc_ += 4;
+ }
+
+ void emit_at_w(uint8_t* pc, uint32_t val) {
+ *reinterpret_cast<uint32_t*>(pc) = val;
+ }
+
+ void emit_dw(uint64_t val) {
+ *reinterpret_cast<uint64_t*>(pc_) = val;
+ pc_ += 8;
+ }
+
+ public:
+ Assembler() {
+ buffer_ = new uint8_t[1024];
+ pc_ = buffer_;
+ }
+
+ ~Assembler() {
+ delete buffer_;
+ }
+
+ void* buffer() {
+ return (void*)buffer_;
+ }
+
+ void* pc() {
+ return (void*)pc_;
+ }
+ };
+}