static std::vector<SgAsmFunction*>
loadFunctions(const std::vector<std::string> &specimen, P2::Engine &engine) {
engine.reset(); // clear all but config properties
engine.doingPostAnalysis(false); // not needed for this tool
SgAsmBlock *gblock = engine.buildAst(specimen); // parse, load, link, disassemble, partition, build AST
return SageInterface::querySubTree<SgAsmFunction>(gblock); // return just the functions
}
SgProject*
buildAst(int argc, char *argv[], Settings &settings) {
using namespace Sawyer::CommandLine;
P2::Engine engine;
// Parse the commane-line
Parser p = engine.commandLineParser("transcode to LLVM", "Convert an ELF/PE specimen to LLVM assembly for testing.");
SwitchGroup tool("Tool-specific switches");
tool.insert(Switch("llvm")
.argument("version", anyParser(settings.llvmVersionString))
.doc("Version number for LLVM. The version number is a doublet or triplet of integers such as \"3.5\" or "
"\"3.5.0\" and indicates which dialect of assembly should be emitted. The LLVM assembly syntax, being "
"mostly an LLVM internal language, changes in incompatible ways between LLVM versions. This transcoder "
"supports only certain versions (e.g., 3.5.0 and 3.7.0 as of December 2015)."));
std::vector<std::string> specimen = p.with(tool).parse(argc, argv).apply().unreachedArgs();
if (specimen.empty()) {
::mlog[FATAL] <<"no binary specimen; see --help for usage\n";
exit(1);
}
// Parse the LLVM version number specified on the command-line
if (!settings.llvmVersionString.empty()) {
const char *s = settings.llvmVersionString.c_str();
char *rest = NULL;
errno = 0;
int a = strtol(s, &rest, 10), b = 0, c = 0;
if ('.'==*rest && 0==errno) {
b = strtol(rest+1, &rest, 10);
if ('.'==*rest && 0==errno)
c = strtol(rest+1, &rest, 10);
}
settings.llvmVersion = 1000000 * a + 1000 * b + c;
}
// Parse, load, disassemble, and partition the specimen.
(void) engine.buildAst(specimen);
SgProject *project = SageInterface::getProject();
if (!project) {
::mlog[FATAL] <<"This tool only supports ELF/PE specimens.\n";
exit(1);
}
return project;
}
