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[Qemu-devel] qemu gdb


From: chandra shekar
Subject: [Qemu-devel] qemu gdb
Date: Thu, 23 Sep 2010 12:55:24 +0530

This is output when i use gdb with my img in which i installed windows xp and after some time i get cannot find bound of the current line or received SIGTRAP  Trace/breakpoint trap and stops plz any one help

$ gdb -args x86_64-softmmu/qemu-system-x86_64 -m 512 -cdrom guest1.img

(gdb) r
Starting program: /home/project/temp/qemu-0.12.4/x86_64-softmmu/qemu-system-x86_64 -m 512 -cdrom guest1.img
[Thread debugging using libthread_db enabled]
[New Thread 0x899f0b70 (LWP 8918)]

Program received signal SIGUSR2, User defined signal 2.
0x0012d422 in __kernel_vsyscall ()
(gdb) n
Single stepping until exit from function __kernel_vsyscall,
which has no line number information.
aio_signal_handler (signum=12) at posix-aio-compat.c:501
501    {
(gdb) n
502        if (posix_aio_state) {
(gdb) n
[Thread 0x899f0b70 (LWP 8918) exited]
505            write(posix_aio_state->wfd, &byte, sizeof(byte));
(gdb) n
503            char byte = 0;
(gdb) n
505            write(posix_aio_state->wfd, &byte, sizeof(byte));
(gdb) n
508        qemu_service_io();
509    }
(gdb) n
0x0012d422 in __kernel_vsyscall ()
(gdb) n
Single stepping until exit from function __kernel_vsyscall,
which has no line number information.
0x00240971 in select () from /lib/tls/i686/cmov/libc.so.6
(gdb) n
Single stepping until exit from function select,
which has no line number information.
0x00281216 in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) c
Continuing.
VNC server running on `127.0.0.1:5900'
[New Thread 0x899f0b70 (LWP 8920)]

Program received signal SIGUSR2, User defined signal 2.
0x0012d422 in __kernel_vsyscall ()
(gdb) n
Single stepping until exit from function __kernel_vsyscall,
which has no line number information.
[Thread 0x899f0b70 (LWP 8920) exited]
0x00240971 in select () from /lib/tls/i686/cmov/libc.so.6
(gdb) s
Cannot find bounds of current function


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