Nmap Development mailing list archives
Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01)
From: "Kurt Grutzmacher" <grutz () jingojango net>
Date: Fri, 10 Mar 2006 11:12:50 -0800
I've been able to track this down to the Mac's GCC compiler and the optimization "-fthread-jumps" -fthread-jumps Perform optimizations where we check to see if a jump branches to a location where another comparison subsumed by the first is found. If so, the first branch is redirected to either the destination of the second branch or a point immediately following it, depending on whether the condition is known to be true or false. Enabled at levels -O2, -O3, -Os, -Oz (APPLE ONLY). Process of elimination finally gave it away. I set CFLAGS to -O1 and manually set each -f that -O2 enables and plucked my way through them until I found the flag(s) that caused nmap to SIGSEV. No matter what -fthread-jumps always caused a SIGSEV. Fixing this is way beyond my knowledge. Seems like it's a problem with Apple's Xcode: Using built-in specs. Target: i686-apple-darwin8 Configured with: /private/var/tmp/gcc/gcc-5250.obj~12/src/configure--disable-checking -enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --build=powerpc-apple-darwin8 --with-arch=pentium-m --with-tune=prescott --program-prefix= --host=i686-apple-darwin8 --target=i686-apple-darwin8 Thread model: posix gcc version 4.0.1 (Apple Computer, Inc. build 5250) _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev
Current thread:
- SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kelly M (Mar 05)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) David Warde-Farley (Mar 05)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kelly M (Mar 05)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) David Warde-Farley (Mar 05)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kurt Grutzmacher (Mar 06)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Fyodor (Mar 07)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kelly M (Mar 08)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kurt Grutzmacher (Mar 09)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kurt Grutzmacher (Mar 10)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Fyodor (Mar 10)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kurt Grutzmacher (Mar 10)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Fyodor (Mar 10)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) Kelly M (Mar 05)
- Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01) David Warde-Farley (Mar 05)