Hello , I am new to Genode, and wonderning is there any POSIX compliant C library which runs on top of genode itself not on noux runtime environment, if not available then how I can proceed to port any existing posix library to genode as I have to take care of linux system calls and signal handling mechanism provided by underlying kernel.
Hallo Kiran,
* kiran kumar <kiran.akipogu@...9...> [2015-09-10 10:20:50 +0530]:
I am new to Genode, and wonderning is there any POSIXcompliant C library which runs on top of genode itself not on noux runtime environment, if not available then how I can proceed to port any existing posix library to genode as I have to take care of linux system calls and signal handling mechanism provided by underlying kernel.
There is a libc (based on FreeBSD 8.2.0) that runs directly on top of Genode — no Noux runtime envolved. You will find the backend used to complement the libc on Genode in 'repos/libports/src/lib/libc'.
Regards Josef
Hi,
On 10.09.2015 10:33, Josef Söntgen wrote:
There is a libc (based on FreeBSD 8.2.0) that runs directly on top of Genode — no Noux runtime envolved. You will find the backend used to complement the libc on Genode in 'repos/libports/src/lib/libc'.
just as a quick follow-up, to use the libc, you will need to take the following steps:
* Download the source code of the FreeBSD libc:
<genode-dir>/tool/ports/prepare_port libc
The code will be downloaded to <genode-dir>/contrib/libc-<hash>/
* Specify the libc for your target by adding the following line to the target's build-description file (target.mk):
LIBS += libc
* Enable the 'libports' repository in your <build-dir>/etc/build.conf file by uncommenting the corresponding line.
Note that the libc is a shared library. By using it, your program will implicitly become a dynamically linked executable. Hence, you will need to incorporate the dynamic linker (ld.lib.so) and the libc (libc.lib.so) into your boot image (see 'boot_modules' in your run script).
Cheers Norman
Thanks for suggestion and followup. What I really want is signal handling mechanism provided by the POSIX library i.e., I should be able to register a handler funtion for a signal say SIGALRM or SIGINT, since sigaction function is defined as DUMMY in libc library I think that it is not possible to use this functionality with the current implementation of libc (bundled with genode 14.x), if I am not wrong I would be happy to know to the process involved in extending the libc with signaling feature.
On Thu, Sep 10, 2015 at 9:42 PM, Norman Feske <norman.feske@...1...> wrote:
Hi,
On 10.09.2015 10:33, Josef Söntgen wrote:
There is a libc (based on FreeBSD 8.2.0) that runs directly on top of Genode — no Noux runtime envolved. You will find the backend used to complement the libc on Genode in 'repos/libports/src/lib/libc'.
just as a quick follow-up, to use the libc, you will need to take the following steps:
Download the source code of the FreeBSD libc:
<genode-dir>/tool/ports/prepare_port libc
The code will be downloaded to <genode-dir>/contrib/libc-<hash>/
Specify the libc for your target by adding the following line to the target's build-description file (target.mk):
LIBS += libc
Enable the 'libports' repository in your <build-dir>/etc/build.conf file by uncommenting the corresponding line.
Note that the libc is a shared library. By using it, your program will implicitly become a dynamically linked executable. Hence, you will need to incorporate the dynamic linker (ld.lib.so) and the libc (libc.lib.so) into your boot image (see 'boot_modules' in your run script).
Cheers Norman
-- Dr.-Ing. Norman Feske Genode Labs
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Josef Söntgen -
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Norman Feske