diff options
| author | kib <kib@FreeBSD.org> | 2015-08-29 14:25:01 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2015-08-29 14:25:01 +0000 |
| commit | 146b187d13b83615f02a68c038af82670588495f (patch) | |
| tree | adcae95aa50cd2cbf281d867115b7156006965ea /lib/libc/sys/sigprocmask.c | |
| parent | 8cde3bfeee04d11f30244c875082f0c8423cbcd8 (diff) | |
| download | FreeBSD-src-146b187d13b83615f02a68c038af82670588495f.zip FreeBSD-src-146b187d13b83615f02a68c038af82670588495f.tar.gz | |
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
Diffstat (limited to 'lib/libc/sys/sigprocmask.c')
| -rw-r--r-- | lib/libc/sys/sigprocmask.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libc/sys/sigprocmask.c b/lib/libc/sys/sigprocmask.c index 40dba95..d24bb89 100644 --- a/lib/libc/sys/sigprocmask.c +++ b/lib/libc/sys/sigprocmask.c @@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$"); #include "libc_private.h" __weak_reference(__sys_sigprocmask, __sigprocmask); +__weak_reference(sigprocmask, __libc_sigprocmask); #pragma weak sigprocmask int |
