diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2015-08-29 14:25:01 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2015-08-29 14:25:01 +0000 |
| commit | bd6060a1c661b37b3f39a8b92ddea8725ae34fb1 (patch) | |
| tree | adcae95aa50cd2cbf281d867115b7156006965ea /lib/libc/include | |
| parent | 9202485814dc346d38977880db5fe0764ce7fcd3 (diff) | |
Switch libc from using _sig{procmask,action,suspend} symbols, which
are aliases for the syscall stubs and are plt-interposed, to the
libc-private aliases of internally interposed sigprocmask() etc.
Since e.g. _sigaction is not interposed by libthr, calling signal()
removes thr_sighandler() from the handler slot etc. The result was
breaking signal semantic and rtld locking.
The added __libc_sigprocmask and other symbols are hidden, they are
not exported and cannot be called through PLT. The setjmp/longjmp
functions for x86 were changed to use direct calls, and since
PIC_PROLOGUE only needed for functional PLT indirection on i386, it is
removed as well.
The PowerPC bug of calling the syscall directly in the setjmp/longjmp
implementation is kept as is.
Reported by: Pete French <petefrench@ingresso.co.uk>
Tested by: Michiel Boland <boland37@xs4all.nl>
Reviewed by: jilles (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Notes
svn path=/head/; revision=287292
Diffstat (limited to 'lib/libc/include')
| -rw-r--r-- | lib/libc/include/libc_private.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h index a670d63e0854..5caf9a362550 100644 --- a/lib/libc/include/libc_private.h +++ b/lib/libc/include/libc_private.h @@ -359,6 +359,11 @@ __pid_t __sys_wait6(enum idtype, __id_t, int *, int, __ssize_t __sys_write(int, const void *, __size_t); __ssize_t __sys_writev(int, const struct iovec *, int); +int __libc_sigaction(int, const struct sigaction *, + struct sigaction *) __hidden; +int __libc_sigprocmask(int, const __sigset_t *, __sigset_t *) + __hidden; +int __libc_sigsuspend(const __sigset_t *) __hidden; int __libc_sigwait(const __sigset_t * __restrict, int * restrict sig); int __libc_system(const char *); |