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. --- include/signal.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/signal.h b/include/signal.h index 61ad422dcb..7cbe64b8ad 100644 --- a/include/signal.h +++ b/include/signal.h @@ -17,13 +17,16 @@ libc_hidden_proto (_sys_siglist) /* Now define the internal interfaces. */ extern __sighandler_t __bsd_signal (int __sig, __sighandler_t __handler); extern int __kill (__pid_t __pid, int __sig); +libc_hidden_proto (__kill) extern int __sigaction (int __sig, const struct sigaction *__restrict __act, struct sigaction *__restrict __oact); libc_hidden_proto (__sigaction) extern int __sigblock (int __mask); +libc_hidden_proto (__sigblock) extern int __sigsetmask (int __mask); extern int __sigprocmask (int __how, const sigset_t *__set, sigset_t *__oset); +libc_hidden_proto (__sigprocmask) extern int __sigsuspend (const sigset_t *__set); libc_hidden_proto (__sigsuspend) extern int __sigwait (const sigset_t *__set, int *__sig); @@ -40,6 +43,7 @@ extern int __sigreturn (struct sigcontext *__scp); #endif extern int __sigaltstack (const stack_t *__ss, stack_t *__oss); +libc_hidden_proto (__sigaltstack) extern int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact); libc_hidden_proto (__libc_sigaction) -- cgit v1.2.3