I think this is more involved than just avoiding memcpy(). If you look at the libexec/rtld-elf/Makefile near the start, you would see MK_SSP=no. In other words, we know that rtld must be compiled without stack protector, but you effectively point out that libc_pic.a is compiled with it, and this causes more troubles.

I suggest to consider changing the build for libc_pic.a to also avoid -fstack-protector instead of fixing the single place.

In D15208#320453, @kib wrote:

I think this is more involved than just avoiding memcpy(). If you look at the libexec/rtld-elf/Makefile near the start, you would see MK_SSP=no. In other words, we know that rtld must be compiled without stack protector, but you effectively point out that libc_pic.a is compiled with it, and this causes more troubles.

I suggest to consider changing the build for libc_pic.a to also avoid -fstack-protector instead of fixing the single place.

@kib, I submitted another revision (D15283) to address this. Please let me know your comments.

This revision can be discarded.