On Fri, 2009-03-06 at 22:05 +0100, Carsten Gnörlich wrote: > Hi Nathan, > > Compiling the debian source with -ggdb in CFLAGS gets me to > spiral.c: > > > > Program received signal SIGILL, Illegal instruction. > > [Switching to Thread 0xb7469710 (LWP 31121)] > > 0x080c4e7e in CreateSpiral (outline=0x83026e8, fill=0x83026c8, > > start_radius=10, segment_size=5, n_segments=1000) at spiral.c:59 > > 59 spiral->diameter = 2.0 * scale_o*cos(0); > > > > Commenting out that line gets me to the GUI, but it dies again later > on > > when it tries to draw the spiral when attempting to scan a disc (at > line > > 119 in spiral.c). > > > Very strange. This part of the code has not been changed for ages; > however I realize some typecasting sloppiness there. > Actually segment_size should be cast to (double), and the cosine's arg > better be 0.0. The corrected code fragment looks like: > > scale_o = (double)start_radius + ring_expand + (double)segment_size; > } > > spiral->diameter = 2.0 * scale_o*cos(0.0); > > If that does not help, try commenting out the above line and hardcode a > reasonable value: > > spiral->diameter = 180; > > In that case I would like to see the value of spiral->diameter and > scale_o leading to the crash. > > > And some completely different idea: SIGILL could be a sign of trying to > execute a non existing > instruction. As dvdisaster has been made SSE2-aware since 0.71.27, maybe > > ./configure --with-sse2=no > > will change something? > > Cheers, > Carsten >
Carsten, Ding! My Athlon XP doesn't have SSE2 support, but the configure script detects that it does. This is surely the problem: stiner...@stine-1:~$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 8 model name : AMD Athlon(tm) 2400+ stepping : 1 cpu MHz : 2000.271 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up bogomips : 4000.54 clflush size : 32 power management: ts Using --with-sse2=no gives normal operation after a standard compile. Glad we finally got this nailed down! Nathan A. Stine -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
