Re: [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v10)

[Florian Weimer]

* Mathieu Desnoyers:

> * Makefile:
>
> LIBCPATH=/home/efficios/glibc-test/lib
> KERNEL_HEADERS=/home/efficios/git/linux-percpu-dev/usr/include
> CFLAGS=-I${KERNEL_HEADERS} -L${LIBCPATH} -Wl,--rpath=${LIBCPATH} -Wl,--dynamic-linker=${LIBCPATH}/ld-linux-x86-64.so.2
>
> all:
> 	gcc ${CFLAGS} -o a a.c
> 	gcc ${CFLAGS} -shared -fPIC -o s.so s.c

For me, that does not correctly link against the built libc because the
system dynamic loader seeps into the link.

> specifically this commit:
> https://github.com/compudj/glibc-dev/commit/c49a286497d065a7fc00aafd846e6edce14f97fc

This commit links __rseq_handled into libc.so.6 via rseq-sym.c, but does
not export it from there.

Thanks,
Florian