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-rw-r--r--asm/intel64/encode.cpp9
-rw-r--r--asm/intel64/mov.cpp29
-rw-r--r--asm/intel64/pop.cpp2
-rw-r--r--asm/intel64/push.cpp2
-rw-r--r--tests/test-asm.cpp35
5 files changed, 75 insertions, 2 deletions
diff --git a/asm/intel64/encode.cpp b/asm/intel64/encode.cpp
index 4e72933..62101f3 100644
--- a/asm/intel64/encode.cpp
+++ b/asm/intel64/encode.cpp
@@ -221,6 +221,15 @@ void Asm::toMachineCode(const FlowGraph::Graph& graph, Segment& segment)
segment.push_back(makeLoadValue(graph.lastOp()->destination(), graph)); // TODO: Just get last operation result to eax for now
segment.push_back(makeOp("xor", Asm::Args{{Asm::Args::Register64("rdi"), Asm::Args::Register64("rdi")}}));
segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register32("edi"), Asm::Args::Register32("eax")}}));
+
+#if 0
+ segment.push_back(makeOp("xor", Asm::Args{{Asm::Args::Register64("rbp"), Asm::Args::Register64("rbp")}}));
+ segment.push_back(makeOp("dec", Asm::Args{{Asm::Args::Register64("rbp")}}));
+ segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Mem32Ptr64("rbp", -4), Asm::Args::Immediate32(3)}}));
+ segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register32("edi"), Asm::Args::Mem32Ptr64("rbp", -4)}}));
+ //segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register32("edi"), Asm::Args::Immediate32(3)}}));
+#endif
+
segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register64("rax"), Asm::Args::Immediate32(60)}})); // syscall 60: exit()
segment.push_back(makeOp("syscall")); // rax: #syscall, rdi: exit code value
} else if (typeid(node_deref) == typeid(FlowGraph::DataNode)) {
diff --git a/asm/intel64/mov.cpp b/asm/intel64/mov.cpp
index 5d09def..805675a 100644
--- a/asm/intel64/mov.cpp
+++ b/asm/intel64/mov.cpp
@@ -51,6 +51,23 @@ Op_mov::Op_mov(const Asm::Args& args)
} else if (args[0].type() == typeid(Asm::Args::Register64) && args[1].type() == typeid(Asm::Args::Immediate32)) { // mov reg64, imm32 (sign-extended)
machine_code = REX("W") + std::vector<uint8_t>{ 0xC7 } + ModRM("/0", std::any_cast<Asm::Args::Register64>(args[0]).name()) + std::any_cast<Asm::Args::Immediate32>(args[1]).getCode();
+ } else if (args[0].type() == typeid(Asm::Args::Mem8Ptr64) && args[1].type() == typeid(Asm::Args::Immediate8)) { // mov [reg64], imm8
+ Asm::Args::Mem8Ptr64 ptr{std::any_cast<Asm::Args::Mem8Ptr64>(args[0])};
+ machine_code = std::vector<uint8_t>{ 0xC6 } + ModRM("/0", ptr.reg(), ptr.offs()) + std::any_cast<Asm::Args::Immediate8>(args[1]).getCode();
+
+ } else if (args[0].type() == typeid(Asm::Args::Mem32Ptr64) && args[1].type() == typeid(Asm::Args::Immediate32)) { // mov [reg64], imm32
+ Asm::Args::Mem32Ptr64 ptr{std::any_cast<Asm::Args::Mem32Ptr64>(args[0])};
+ machine_code = std::vector<uint8_t>{ 0xC7 } + ModRM("/0", ptr.reg(), ptr.offs()) + std::any_cast<Asm::Args::Immediate32>(args[1]).getCode();
+
+ } else if (args[0].type() == typeid(Asm::Args::Mem64Ptr64) && args[1].type() == typeid(Asm::Args::Immediate32)) { // mov [reg64], imm32 (sign-extended to imm64)
+ Asm::Args::Mem64Ptr64 ptr{std::any_cast<Asm::Args::Mem64Ptr64>(args[0])};
+ machine_code = REX("W") + std::vector<uint8_t>{ 0xC7 } + ModRM("/0", ptr.reg(), ptr.offs()) + std::any_cast<Asm::Args::Immediate32>(args[1]).getCode();
+
+ } else if (args[0].type() == typeid(Asm::Args::Mem64Ptr64) && args[1].type() == typeid(Asm::Args::Immediate64)) { // mov [reg64], imm64 (cut to imm32)
+ Asm::Args::Mem64Ptr64 ptr{std::any_cast<Asm::Args::Mem64Ptr64>(args[0])};
+ Asm::Args::Immediate32 imm32{std::any_cast<Asm::Args::Immediate64>(args[1])};
+ machine_code = REX("W") + std::vector<uint8_t>{ 0xC7 } + ModRM("/0", ptr.reg(), ptr.offs()) + imm32.getCode();
+
} else {
throw std::runtime_error("Unimplemented: mov "s + args[0].type().name() + " "s + args[1].type().name());
}
@@ -88,6 +105,18 @@ bool registered {
}) &&
registerOp(mangleName<Asm::Args::Register64, Asm::Args::Immediate32>("mov"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
return std::make_shared<Op_mov>(args);
+ }) &&
+ registerOp(mangleName<Asm::Args::Mem8Ptr64, Asm::Args::Immediate8>("mov"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
+ return std::make_shared<Op_mov>(args);
+ }) &&
+ registerOp(mangleName<Asm::Args::Mem32Ptr64, Asm::Args::Immediate32>("mov"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
+ return std::make_shared<Op_mov>(args);
+ }) &&
+ registerOp(mangleName<Asm::Args::Mem64Ptr64, Asm::Args::Immediate32>("mov"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
+ return std::make_shared<Op_mov>(args);
+ }) &&
+ registerOp(mangleName<Asm::Args::Mem64Ptr64, Asm::Args::Immediate64>("mov"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
+ return std::make_shared<Op_mov>(args);
})
};
diff --git a/asm/intel64/pop.cpp b/asm/intel64/pop.cpp
index 6d8b734..6b396a2 100644
--- a/asm/intel64/pop.cpp
+++ b/asm/intel64/pop.cpp
@@ -12,7 +12,7 @@ using namespace std::string_literals;
Op_pop::Op_pop(const Asm::Args& args)
{
if (args[0].type() == typeid(Asm::Args::Register64)) { // pop reg64
- machine_code = std::vector<uint8_t>{ 0x58 } + RegNo(std::any_cast<Asm::Args::Register64>(args[0]).name());
+ machine_code = std::vector<uint8_t>{ static_cast<uint8_t>(0x58 + RegNo(std::any_cast<Asm::Args::Register64>(args[0]).name())) };
} else {
throw std::runtime_error("Unimplemented: pop "s + args[0].type().name());
}
diff --git a/asm/intel64/push.cpp b/asm/intel64/push.cpp
index 37acec9..9fb5955 100644
--- a/asm/intel64/push.cpp
+++ b/asm/intel64/push.cpp
@@ -12,7 +12,7 @@ using namespace std::string_literals;
Op_push::Op_push(const Asm::Args& args)
{
if (args[0].type() == typeid(Asm::Args::Register64)) { // push reg64
- machine_code = std::vector<uint8_t>{ 0x50 } + RegNo(std::any_cast<Asm::Args::Register64>(args[0]).name());
+ machine_code = std::vector<uint8_t>{ static_cast<uint8_t>(0x50 + RegNo(std::any_cast<Asm::Args::Register64>(args[0]).name())) };
} else {
throw std::runtime_error("Unimplemented: push "s + args[0].type().name());
}
diff --git a/tests/test-asm.cpp b/tests/test-asm.cpp
index 650a48a..6c03f48 100644
--- a/tests/test-asm.cpp
+++ b/tests/test-asm.cpp
@@ -146,6 +146,41 @@ TEST_F(AsmTest, Intel64_multiple) {
}));
}
+TEST_F(AsmTest, indexed_to) {
+ Segment segment;
+
+ segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Mem32Ptr64("rbp", -4), Asm::Args::Immediate32(3)}}));
+
+ ASSERT_EQ(segment.size(), size_t(1));
+ ASSERT_EQ(segment.getCode(), std::vector<uint8_t>({0xC7, 0x45, 0xFC, 0x03, 0x00, 0x00, 0x00}));
+}
+
+TEST_F(AsmTest, indexed_from) {
+ Segment segment;
+
+ segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register32("edi"), Asm::Args::Mem32Ptr64("rbp", -4)}}));
+
+ ASSERT_EQ(segment.size(), size_t(1));
+ ASSERT_EQ(segment.getCode(), std::vector<uint8_t>({0x8B, 0x7D, 0xFC}));
+}
+
+TEST_F(AsmTest, frame_pointer) {
+ Segment segment;
+
+ segment.push_back(makeOp("push", Asm::Args{{Asm::Args::Register64("rbp")}}));
+ segment.push_back(makeOp("mov", Asm::Args{{Asm::Args::Register64("rbp"), Asm::Args::Register64("rsp")}}));
+
+ // frame at [rbp-...] available here ...
+
+ segment.push_back(makeOp("pop", Asm::Args{{Asm::Args::Register64("rbp")}}));
+
+ ASSERT_EQ(segment.size(), size_t(3));
+ ASSERT_EQ(segment.getCode(), std::vector<uint8_t>({
+ 0x55,
+ 0x48, 0x89, 0xE5,
+ 0x5D}));
+}
+
TEST_F(AsmParseTest, parse_empty) {
std::vector<std::shared_ptr<Chunk>> chunks0{parseAsm("")};
ASSERT_EQ(chunks0.size(), 0u);
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