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| author | Christopher Faylor <me@cgf.cx> | 2013-06-07 16:05:12 +0000 |
|---|---|---|
| committer | Christopher Faylor <me@cgf.cx> | 2013-06-07 16:05:12 +0000 |
| commit | 0f38043d8bda7c157f916a3e77cb4f84d17355bd (patch) | |
| tree | ee5566a85fa65956aafe1d2a810d6ee264e07295 /winsup/cygwin/exceptions.cc | |
| parent | 97911774484304d27f9db9581b10e4dac0189134 (diff) | |
| download | cygnal-0f38043d8bda7c157f916a3e77cb4f84d17355bd.tar.gz cygnal-0f38043d8bda7c157f916a3e77cb4f84d17355bd.tar.bz2 cygnal-0f38043d8bda7c157f916a3e77cb4f84d17355bd.zip | |
* exceptions.cc (exception::handle): Add comment explaining si_addr behavior.
Diffstat (limited to 'winsup/cygwin/exceptions.cc')
| -rw-r--r-- | winsup/cygwin/exceptions.cc | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc index aa0036a18..c1b313910 100644 --- a/winsup/cygwin/exceptions.cc +++ b/winsup/cygwin/exceptions.cc @@ -753,6 +753,10 @@ exception::handle (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT *in, void } cygwin_exception exc (framep, in, e); si.si_cyg = (void *) &exc; + /* POSIX requires that for SIGSEGV and SIGBUS, si_addr should be set to the + address of faulting memory reference. For SIGILL and SIGFPE these should + be the address of the faulting instruction. Other signals are apparently + undefined so we just set those to the faulting instruction too. */ si.si_addr = (si.si_signo == SIGSEGV || si.si_signo == SIGBUS) ? (void *) e->ExceptionInformation[1] : (void *) in->_GR(ip); me.incyg++; @@ -767,12 +771,11 @@ exception::handle (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT *in, void #define SIG_NONMASKABLE (SIGTOMASK (SIGKILL) | SIGTOMASK (SIGSTOP)) /* Non-raceable sigsuspend - * Note: This implementation is based on the Single UNIX Specification - * man page. This indicates that sigsuspend always returns -1 and that - * attempts to block unblockable signals will be silently ignored. - * This is counter to what appears to be documented in some UNIX - * man pages, e.g. Linux. - */ + Note: This implementation is based on the Single UNIX Specification + man page. This indicates that sigsuspend always returns -1 and that + attempts to block unblockable signals will be silently ignored. + This is counter to what appears to be documented in some UNIX + man pages, e.g. Linux. */ int __stdcall handle_sigsuspend (sigset_t tempmask) { |