diff options
| author | Richard Lowe <richlowe@richlowe.net> | 2012-04-14 20:29:22 -0400 |
|---|---|---|
| committer | Richard Lowe <richlowe@richlowe.net> | 2012-06-14 15:56:15 -0400 |
| commit | 6a3e8e8695d5c7d1d18c6800d676990d7f61a2a4 (patch) | |
| tree | 0779c36aa010ab283c6d8df98bdb87909bf11d3a /usr/src/lib/libc/port/unwind/unwind.c | |
| parent | a3477ee4728af4a4c3c6869e248aa735d52cbefb (diff) | |
| download | illumos-gate-6a3e8e8695d5c7d1d18c6800d676990d7f61a2a4.tar.gz | |
1450 Illumos should be buildable with GCC4
Reviewed by: Joshua M. Clulow <josh@sysmgr.org>
Reviewed by: Keith Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Reviewed by: Albert Lee <trisk@nexenta.com>
Approved by: Gordon Ross <gwr@nexenta.com>
Diffstat (limited to 'usr/src/lib/libc/port/unwind/unwind.c')
| -rw-r--r-- | usr/src/lib/libc/port/unwind/unwind.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/usr/src/lib/libc/port/unwind/unwind.c b/usr/src/lib/libc/port/unwind/unwind.c index 2a7f0ccc0f..e457f8df5c 100644 --- a/usr/src/lib/libc/port/unwind/unwind.c +++ b/usr/src/lib/libc/port/unwind/unwind.c @@ -24,8 +24,6 @@ * Use is subject to license terms. */ -#pragma ident "%Z%%M% %I% %E% SMI" - #include "lint.h" #include "thr_uberdata.h" #include <dlfcn.h> @@ -40,9 +38,13 @@ * _ex_unwind() is provided by libC, but if libC is not loaded we * need to call a local version of _ex_unwind() which does exactly * the same thing except for calling C++ destructors. + * + * Note that neither of these literally "returns twice" as, for eg, setjmp + * does, but they induce unusual control flow which the compiler should treat + * in the same manner (make all registers dead, etc.). */ -extern void _ex_clnup_handler(void *, void (*)(void *)); -extern void _ex_unwind_local(void); +extern void _ex_clnup_handler(void *, void (*)(void *)) __RETURNS_TWICE; +extern void _ex_unwind_local(void) __RETURNS_TWICE; #pragma unknown_control_flow(_ex_clnup_handler) #pragma unknown_control_flow(_ex_unwind_local) |