From 6a088436d4c04b8081e86f9e856f10fba97d0612 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Sun, 1 Oct 2017 16:04:26 -0700 Subject: Hide internal signal functions [BZ #18822] 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. --- signal/kill.c | 1 + signal/sigblock.c | 1 + signal/sigprocmask.c | 1 + 3 files changed, 3 insertions(+) (limited to 'signal') diff --git a/signal/kill.c b/signal/kill.c index c7591b10c1..66f85d127c 100644 --- a/signal/kill.c +++ b/signal/kill.c @@ -30,4 +30,5 @@ __kill (int pid, int sig) } stub_warning (kill) +libc_hidden_def (__kill) weak_alias (__kill, kill) diff --git a/signal/sigblock.c b/signal/sigblock.c index a8be9dbde9..fca370a52d 100644 --- a/signal/sigblock.c +++ b/signal/sigblock.c @@ -27,4 +27,5 @@ __sigblock (int mask) } stub_warning (sigblock) +libc_hidden_def (__sigblock) weak_alias (__sigblock, sigblock) diff --git a/signal/sigprocmask.c b/signal/sigprocmask.c index afcf5a116e..ca9bb556b8 100644 --- a/signal/sigprocmask.c +++ b/signal/sigprocmask.c @@ -44,4 +44,5 @@ __sigprocmask (int how, const sigset_t *set, sigset_t *oset) and we don't want warnings for every use of abort on a system without safe signals. */ +libc_hidden_def (__sigprocmask) weak_alias (__sigprocmask, sigprocmask) -- cgit 1.4.1