I am looking for steps to perform code coverage using gcov tool for FreeBSD kernel code.
So far I have compiled FreeBSD code and looking at the path: /usr/obj/usr/src/sys/GENERIC/
, I found .o and .gcno files. How can I make use of these with gcov?
I suggest to look at tools like gcovr or lcov to produce a graphical summary
Related
I'm trying to build a GCC/newlib cross compilation toolchain targeting an embedded OS on RISC-V. For this purpose, I need to modify the virtual addresses that binaries are linked at.
One way to achieve this is to modify the default linker script that ships with the toolchain.
I'm trying to find the best location in the involved components (newlib, binutils, gcc) where I can tweak the default linker script that is shipped with the toolchain.
For some platforms, newlib already provides partial or complete linker scripts. It seems for RISC-V the default linker script produced by binutils is used.
I'm fine with patching binutils, but I can't find how the RISC-V linker script is actually built or how I would modify anything in it. Any pointers are appreciated!
The different linker scripts for riscv are build from :
binutils/ld/scripttempl/elf.sc
binutils/ld/emulparams/elf32lriscv*
binutils/ld/emulparams/elf64lriscv*
You will need to modifiy these files or create your own and modify the Makefiles.
I have to run riscv-tests and SPEC2006 on riscv-linux (booted) on FPGA. I would like to know what is the compilation toolchain to be used for this flow.
I understand that riscv-linux has to be compiled with riscv64-linux-gcc. However, I'm unclear that about riscv-tests. Can riscv-elf-gcc be used to compile riscv-tests and run on riscv-linux? I read some of the posted mentioned in stackoverflow about SPEC2006 and bbl (both compiled with riscv-linux-gcc). I want to run riscv-tests also. Should they also be compiled with (riscv-linux-gcc) ?
Thanks!
To compile bbl or baremetal applications like riscv-tests you should you riscv64-unknown-elf- or riscv32-unknown-elf- (with Newlib) .
Because riscv64-linux contains more libraries that make compilation process complicated.We mainly use riscv64-linux to compile application that run on riscv-linux.
Hi team,
I have three files which I need to compile for testing, btw im using CentOS linux.
source_code.c
library.h
library.c
how do I put the library.h in the gcc library, so I can use it?
how do I compile the source_code.c to use that library?
Thank you very much.
This is basic knowledge of your tools, but you can do this:
#include "library.h" in the include section of the library.c code (at top of the file).
gcc source_code.c library.c in the linux terminal will link and compile both source_code.c and library.c. This will generate an executable named "a.out" (if there were no compilation problems). You can change its name, by adding the option -o name to the gcc command (gcc source_code.c library.c -o mycode will generate an executable named "mycode").
If you really need a library that will be used by a lot of other programs, you can look for "shared libraries", but I think that you are asking for a basic thing.
You dont need this library.h while building and executable (with gcc) as you should have specified the exact location of the library in the source file. All you need to do is gcc sourcefile1.c sourcefile2.c -o exename
I'm trying to implement an open source library that is built using the GNU compiler. (namely, this: https://github.com/mjwybrow/adaptagrams )
I've tried opening and building that source code using VSC++ 6, but it results in over a thousand errors due to the strict nature of the VS compiler I guess. And rather then go through every error and try fix it myself, I was wondering if it's possible to just include the .lib if it is built with the GNU compiler?
EDIT:
Included in the source code linked above is an autogen.sh file.
mkdir -p m4
autoreconf --install --verbose
automake -a --add-missing
./configure
make
Running that with Cygwin results in a few .a library files to be created, which are unusable in VS. Is it ok to just rename these to .lib files?
I've found some stuff online about how to use GCC and create a DLL, but my problem is that I don't know enough about the GNU compiler or makefiles, or the source code in general to be able to change it right now.
Does anybody have any clues on what exactly I'd need to change to get it right? Or even better, has anyone created a DLL using this source code already that would be able to pass it on to me, or let me know what I have to do?
Or could anyone point me towards a similar library that would be compatible with visual studio?
No; you can however build the .dll file with gcc and use the .dll from msvc (with either a hand-crafted include file or a properly formatted one from the beginning, with platform specific import/export macros on top).
Are there any command line interpreters or any other set of programs around for x86 linux in order to run MIPS assembly programs?
I'd like to be able to write simple MIPS assembly programs and run them from the console on my local machine.
I know of SPIM but it requires X Windows and I'm curious if there are better options out there.
Edit: Turns out it doesn't require X Windows. I still have issues with SPIM. Not the best in my humble opinion. Qemu / Cross compiled toolchain is a little more work but I have less quirks.
Incidentally, Spim does not require X Windows. It has a console interface as well. Run either spim or xspim.
You will need either a cross compilation toolchain, or to build your own cross binutils.
For a prebuilt toolchain, you can visit code sourcery. If you just want to compile assembly, then all
you need is binutils. There are some guidelines on the Linux Mips wiki
For the emulation part, QEmu would be my choice.
MARS made my assembly programming for MIPS architecture so much easier. If you would like a GUI/IDE, I would recommend MARS for sure.
I was in the same situation yesterday. I also didn't like SPIM, so this is what I did:
installed gxemul and gxemul-doc (those are the package names on debian)
installed netbsd on an emulated MIPS machine following the detailed instructions in the documentation
since netbsd already includes the standard gcc toolchain and vi, you're good to go.
Setting up networking is pretty easy and well documented, too. This has the advantage of not needing to fiddle with cross compilation.
You could use gxemul, which emulates a MIPS machine (among others, including Dreamcast), and is able to run many Operating systems (included linux, netbsd and some more).
gxemul-wikipedia
gxemul-home page
QEmu has a good MIPS emulator. Combine that with a cross-compiled GCC/binutils (technically you only need binutils to get GAS, the GNU assembler) and you're good to go.
Assuming you wish to use GCC.
Steps for compiling for MIPS on an x86-64 system, and then running the executable using an emulator:
Use a cross-compilation toolchain to produce an executable.
If you are on Debian/Ubuntu, install a cross-compilation toolchain for MIPS. For example, either of these APT packages: gcc-mips-linux-gnu (MIPS big endian) or gcc-mipsel-linux-gnu (MIPS little endian).
Compile using mips-linux-gnu-gcc (mipsel-linux-gnu-gcc for little endian MIPS); assemble using mips-linux-gnu-as; link using mips-linux-gnu-ld.
Run the executable using an emulator.
Install an emulator that can launch Linux programs compiled for one architecture (e.g. MIPS) on another architecture (e.g. x86-64): sudo apt-get install qemu-user.
Run your executable compiled for MIPS using the emulator: qemu-mips ./a.out (or qemu-mipsel ./a.out for little endian MIPS). Simply running ./a.out might also work; the emulator might be used automagically if you (or your distro's qemu package) has set up binfmt-misc to transparently run qemu-user.
Maybe you can take a look at these emulators? I'm not an expert but the list seems good.