[PATCH 0/2] Define _edata, __bss_start, and _end only for executables

[H.J. Lu]

On Tue, Jun 5, 2018 at 5:48 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> _edata, __bss_start, and _end are defined for executables.  FreeBSD's
> libc.so uses executable's _end to initialize curbrk.  But there is no
> good reason to access values of _edata, __bss_start, and _end defined
> in shared libraries.  We should define _edata, __bss_start, and _end
> only for executables.  To exclude _edata, __bss_start, _end and end
> from shared libraries, EXCLUDE_SHLIB_SYMBOLS should be set.
>
> This series of patches sets EXCLUDE_SHLIB_SYMBOLS for x86 ELF targets.
> There are no regressions on
>
> aarch64-linux

I withdrew this series of patches since in glibc, ld.so has

/* These defined magically in the linker script.  */
extern char _begin[] attribute_hidden;
extern char _etext[] attribute_hidden;
extern char _end[] attribute_hidden;

it can't reference _end defined in executables.


-- 
H.J.