[PATCH 32/58] Hide internal signal functions [BZ #18822]

[H.J. Lu]

On 9/1/17, H.J. Lu <hjl.tools@gmail.com> wrote:
> Hide internal signal functions to allow direct access within libc.so and
> libc.a without using GOT nor PLT.
>
> __GI___kill and __GI___sigaltstack are defined when syscalls.list is
> used to generate them.  Otherwise libc_hidden_def is needed explicitly.
>
> 	[BZ #18822]
> 	* include/signal.h (__kill): Add libc_hidden_proto.
> 	(__sigblock): Likewise.
> 	(__sigprocmask): Likewise.
> 	(__sigaltstack): Likewise.
> 	* signal/kill.c (__kill): Add libc_hidden_def.
> 	* signal/sigblock.c (__sigblock): Likewise.
> 	* signal/sigprocmask.c (__sigprocmask): Likewise.
> 	* sysdeps/mach/hurd/kill.c (__kill): Likewise.
> 	* sysdeps/mach/hurd/sigaltstack.c (__sigaltstack): Likewise.
> 	* sysdeps/mach/hurd/sigprocmask.c (__sigprocmask): Likewise.
> 	* sysdeps/posix/sigblock.c (__sigblock): Likewise.
> 	* sysdeps/unix/sysv/linux/alpha/sigprocmask.c (__sigprocmask):
> 	Likewise.
> 	* sysdeps/unix/sysv/linux/ia64/sigprocmask.c (__sigprocmask):
> 	Likewise.
> 	* sysdeps/unix/sysv/linux/s390/s390-64/sigprocmask.c
> 	(__sigprocmask): Likewise.
> 	* sysdeps/unix/sysv/linux/sigprocmask.c (__sigprocmask):
> 	Likewise.
> 	* /sysdeps/unix/sysv/linux/sparc/sparc64/sigprocmask.c
> 	(__sigprocmask): Likewise.
> 	* sysdeps/unix/sysv/linux/x86_64/sigprocmask.c (__sigprocmask):
> 	Likewise.

Tested with build-many-glibcs.py.  I am checking it in.

-- 
H.J.