abi

If I get a bool variable and set its second bit to 1, then variable evaluates to true and false at the same time. Compile the following code with gcc6.3 with -g option, ( gcc-v6.3.0/Linux/RHEL6.0-2016-x86_64/bin/g++ -g main.cpp -o mytest_d ) and run the executable. You get the following. How can T be equal to true and false at the same time? value bits ----- ---- T: 1 0001 after bit change T: 3 0011 T is true T is false This can happen when you call a function in a different language (say fortran) where true and false definition is different than C++. For fortran if any bits are not 0 then the

I am new to linux system programming and I came across API and ABI while reading Linux System Programming . Definition of API : An API defines the interfaces by which one piece of software communicates with another at the source level. Definition of ABI : Whereas an API defines a source interface, an ABI defines the low-level binary interface between two or more pieces of software on a particular architecture. It defines how an application interacts with itself, how an application interacts with the kernel, and how an application interacts with libraries. How can a program communicate at a

This is a weird issue that I can't seem to find an answer to. This: #include <iostream> using namespace std; void show_number(int number) { cout << number << endl; // Shows '10' as expected } int main() { cout << endl; // Remove this and it fails __asm { mov rdi, 10 call show_number } } actually works fine, except when you remove the initial cout << endl (first line of main ). When you remove it, the cout in show_number seems to cause a segfault for some reason. What causes this? (OSX Mavericks x64, but should work in linux as well I think) Macmade The Mac OS X ABI requires a 16-bytes stack

At the Spark 2.1 docs it's mentioned that Spark runs on Java 7+, Python 2.6+/3.4+ and R 3.1+. For the Scala API, Spark 2.1.0 uses Scala 2.11. You will need to use a compatible Scala version (2.11.x). at the Scala 2.12 release news it's also mentioned that: Although Scala 2.11 and 2.12 are mostly source compatible to facilitate cross-building, they are not binary compatible. This allows us to keep improving the Scala compiler and standard library. But when I build an uber jar (using Scala 2.12) and run it on Spark 2.1. every thing work just fine. and I know its not any official source but at

downloaded and compiled glibc-2.13. when i try to run a sample C program which does a malloc(). I get following error elf file OS ABI invalid Can anybody please pass my any pointer helpful in resolving this issue.Please note that my kernel version is linux-2.6.35.9 mkj It's not your kernel version that's the problem. The loader on your system does not support the new Linux ABI. Until relatively recently, Linux ELF binaries used the System V ABI. Recently, in support of STT_GNU_IFUNC, the Linux ABI was added. You would have to update your system C library to have a loader that support STT_GNU

I have a few static libraries, which I'm not the owner of, compiled with an old version of g++ 4.3.2 (c++11/c++0x not activated). When I compile my code with g++ 4.6 (no c++11) and link it using g++ 4.6 with these static libraries, it links fine and I do not seem to get any issues at runtime (not tested everything though). I'm tempted to think that forward compatibility is OK. Now I'd like to compile my code with gcc 4.8 with c++11 and still link it with those same, not recompiled static libraries. Are ABI changes in g++ only an issue for linkage forward compatibility or can one get backward

Where can I find all the differences in data types between the i386 & AMD64 Application Binary Interface(ABI)s ? I know that the long type is 32-bit in i386 ABI & 64-bit in AMD64. Is this correct? Necrolis I suggest you download Dr Agner Fog's optimization manuals . He has a manual specifically about ABIs and their differences. For differences in the instruction set between 32-bit mode and 64-bit mode, both Intel and AMD's instruction manuals should cover this in the introductory volume or the volumes after the instruction volumes( 2a and 2b for Intel's instruction set reference , or 2 and 3