Date: Fri, 3 Feb 1995 14:42:09 -0500 From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> To: phk@ref.tfs.com, rivers@dg-rtp.dg.com Cc: freebsd-bugs@freefall.cdrom.com, freebsd-hackers@freefall.cdrom.com Subject: Re: drand48 problems persist. Message-ID: <199502031942.OAA00366@ponds.UUCP>
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> > > If anyone has an idea as to what's happening here; don't hesitate to > > let me know. > > > Dave, > > I just tried it out and had no problems (on a 486DX2). > > Here is my binary (I changed 3072 -> 3072000 to expose it more.) > try that on your machine, and send me a uuencoded binary from > your system so that I can try that out on mine. > > Poul-Henning > Ok - I ran Poul-Henning's binary on a 2.0R 486DX2 and a Pentium, this is the output I got (from script): Script started on Fri Feb 3 14:37:52 1995 [ponds.water.net]$ cat a | uudecode [ponds.water.net]$ chmod 775 a.out [ponds.water.net]$ ./a.out 25982.000000 is greater than 1.0 55082.000000 is greater than 1.0 23156.000000 is greater than 1.0 29267.000000 is greater than 1.0 20885.000000 is greater than 1.0 Floating exception - core dumped [ponds.water.net]$ Script done on Fri Feb 3 14:38:07 1995 As I pointed out before, the core dump is a seriously bad value being given to printf(). What I'm concerned about is not the core dump, but the fact that drand48() returns something > 1.0. Since this appears to be quite machine/configuration specific, here's the configuration file for that machine. Again, this is with 2.0R installed from the net (the original one.) # # GENERICAH -- Generic machine with WD/AHx/NCR family disks # # GENERICAH,v 1.54 1994/11/13 10:17:05 gibbs Exp # machine "i386" cpu "I386_CPU" cpu "I486_CPU" cpu "I586_CPU" ident GENERICAH maxusers 10 options MATH_EMULATE #Support for x87 emulation options INET #InterNETworking options FFS #Berkeley Fast File System options PROCFS #Process filesystem options NFS #Network File System options "CD9660" #CD ISO9660 File System options "COMPAT_43" #Compatible with BSD 4.3 options UCONSOLE #X Console support options "FAT_CURSOR" #block cursor in syscons or pccons options "SCSI_DELAY=15" #Be pessimistic about Joe SCSI device options "NCONS=4" #4 virtual consoles options BOUNCE_BUFFERS #include support for DMA bounce buffers config kernel root on wd0 swap on wd0 and wd1 and sd0 and sd1 dumps on wd0 controller isa0 controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr disk fd0 at fdc0 drive 0 disk fd1 at fdc0 drive 1 #tape ft0 at fdc0 drive 2 controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr disk wd0 at wdc0 drive 0 disk wd1 at wdc0 drive 1 controller wdc1 at isa? port "IO_WD2" bio irq 15 vector wdintr disk wd2 at wdc1 drive 0 disk wd3 at wdc1 drive 1 #controller ahb0 at isa? bio irq ? vector ahbintr controller aha0 at isa? port "IO_AHA0" bio irq ? drq 5 vector ahaintr #controller pas0 at isa? port 0x1f88 bio #controller aic0 at isa? port 0x340 bio irq 11 vector aicintr #controller pci0 #controller ncr0 controller scbus0 device sd0 device sd1 device sd2 device sd3 device st0 device st1 device cd0 #Only need one of these, the code dynamically grows device wt0 at isa? port 0x300 bio irq 5 drq 1 vector wtintr #device mcd0 at isa? port 0x300 bio irq 10 vector mcdintr #device mcd1 at isa? port 0x340 bio irq 11 vector mcdintr device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr device npx0 at isa? port "IO_NPX" irq 13 vector npxintr device sio0 at isa? port "IO_COM1" tty irq 4 vector siointr device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr device sio2 at isa? port "IO_COM3" tty irq 5 vector siointr device sio3 at isa? port "IO_COM4" tty irq 9 vector siointr device lpt0 at isa? port? tty irq 7 vector lptintr device lpt1 at isa? port? tty device lpt2 at isa? port? tty #device ed0 at isa? port 0x280 net irq 5 iomem 0xd8000 vector edintr device ed0 at isa? port 0x300 net irq 9 iomem 0xd8000 vector edintr #device ed1 at isa? port 0x300 net irq 5 iomem 0xd8000 vector edintr #device ed2 at isa? port 0x300 net irq 10 iomem 0xcc000 vector edintr #device ep0 at isa? port 0x300 net irq 10 vector epintr #device ie0 at isa? port 0x360 net irq 7 iomem 0xd0000 vector ieintr #device is0 at isa? port 0x280 net irq 10 drq 7 vector isintr pseudo-device loop pseudo-device ether pseudo-device log pseudo-device sl 2 pseudo-device ppp 2 pseudo-device pty pseudo-device speaker pseudo-device gzip # Exec gzipped a.out's
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