X-Git-Url: https://git.siccegge.de//index.cgi?a=blobdiff_plain;f=src%2Fdisassembler%2FInstructionReader.cxx;fp=src%2Fdisassembler%2FInstructionReader.cxx;h=8f8df91a77e5a2c9f59189728eb7bec8033c3866;hb=2a014774e29e324bc5b5f26143d0384351738ca1;hp=0000000000000000000000000000000000000000;hpb=c01de98bf70184c368bfe79777ca7e5d95649411;p=frida%2Ffrida.git

diff --git a/src/disassembler/InstructionReader.cxx b/src/disassembler/InstructionReader.cxx
new file mode 100644
index 0000000..8f8df91
--- /dev/null
+++ b/src/disassembler/InstructionReader.cxx
@@ -0,0 +1,27 @@
+#include "InstructionReader.hxx"
+
+InstructionReader::InstructionReader(const Target& target)
+    : _logger(log4cxx::Logger::getLogger("disassembler.Target"))
+    , _target(target)
+{
+    DisAsm.reset(_target.getTarget().createMCDisassembler(_target.getSubTargetInfo()));
+    if (!DisAsm) {
+        LOG4CXX_ERROR(_logger, "error: no disassembler for target " << _target.getTripleName())
+            return;
+    }
+}
+
+void InstructionReader::readInstruction(std::string& data, size_t& offset, Instruction& inst) {
+    llvm::MCInst instr;
+    llvm::StringRefMemoryObject memoryObject(data);
+    uint64_t size;
+    
+    if (DisAsm->getInstruction(instr, size, memoryObject, offset,
+                               llvm::nulls(), llvm::nulls())) {
+        
+    } else {
+        LOG4CXX_WARN(_logger, "warning: invalid instruction encoding");
+        if (size == 0)
+            size = 1; // skip illegible bytes
+    }
+}