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[Qemu-devel] qemu SEGV in ide.c:1057

From: Derrik Pates
Subject: [Qemu-devel] qemu SEGV in ide.c:1057
Date: Sun, 29 Feb 2004 10:56:26 -0500
User-agent: Mozilla Thunderbird 0.5 (X11/20040221)

Ok, I've been playing with installing Win2k in qemu - the installer gets started, but it always SEGVs during device detection. It appears Win2k's trying to probe for all available IDE interfaces, and there's a bogus address in the data structure for interface number 6.

#0  ide_ioport_write (env=0x10b930d8, addr=6, val=160)
    at /misc/tmp/qemu/ide.c:1057
1057        IDEState *s = ide_if->cur_drive;
(gdb) bt
#0  ide_ioport_write (env=0x10b930d8, addr=6, val=160)
    at /misc/tmp/qemu/ide.c:1057
#1  0x10002f08 in cpu_outb (env=0x10b930d8, addr=248, val=160)
    at /misc/tmp/qemu/vl.c:300
#2  0x1081e064 in code_gen_buffer ()
#3  0x1002183c in cpu_x86_exec (env1=0x10b930d8)
    at /misc/tmp/qemu/cpu-exec.c:482
#4  0x10006a10 in main_loop (opaque=0x10b930d8) at /misc/tmp/qemu/vl.c:3001
#5  0x100075b4 in main (argc=268763136, argv=0x7ffff2b0)
    at /misc/tmp/qemu/vl.c:3619

(gdb) print addr
$1 = 6
(gdb) print ide_if
$2 = (IDEState *) 0xff00aa55
(gdb) print ide_if->cur_drive
Cannot access memory at address 0xff00aa89

This is from the core file it generated, using 'gdb ./qemu core' to analyze the core dump. Up until this point, Windows 2000 runs fine (though very slowly). Suggestions on what I can do to fix this, patches, etc. are welcomed. I'll try to dig around in the code myself and see what I can figure out.

Derrik Pates

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