When I compile this simple C++ program as a 32-bit executable on a 64-bit linux:#include <iostream> int main() { std::cout << "Hello, World!" << std::endl; return 0; } Using the -m32 option: g++ -m32 out.cpp Valgrind chokes on an supposedly illegal instruction: vex x86->IR: unhandled instruction bytes: 0x67 0xE8 0x7D 0xFF ==18453== valgrind: Unrecognised instruction at address 0x48cc63d. ==18453== at 0x48CC63D: std::locale::locale() (locale_init.cc:250)
Thank you for stating the versions valgrind-3.13.0 and Linux lnx 4.14.12-1-ARCH. However you omitted two important versions: "g++ --version" and the flavor and version of the runtime library containing locale_init.cc which is where the unhandled instruction bytes occur. The code 0x67 0xE8 0x7D 0xFF is "addr32 callq ...". Valgrind is complaining about the 'addr32' opcode prefix. The compiler for locale_init.cc did a not-so-good job. The addr32 prefix is a total waste; remove it. Re-compile locale_init.cc with a better compiler. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
