GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/bin/Xorg... warning: the debug information found in "/usr/lib/debug//usr/bin/Xorg" does not match "/usr/bin/Xorg" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/bin/Xorg" does not match "/usr/bin/Xorg" (CRC mismatch). (no debugging symbols found)...done. (gdb) attache 32397 Attaching to program: /usr/bin/Xorg, process 32397 Reading symbols from /lib/libudev.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libudev.so.0 Reading symbols from /usr/lib/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpciaccess.so.0 Reading symbols from /lib/tls/i686/cmov/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libdl.so.2 Reading symbols from /lib/tls/i686/cmov/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] Loaded symbols for /lib/tls/i686/cmov/libpthread.so.0 Reading symbols from /usr/lib/libXfont.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXfont.so.1 Reading symbols from /usr/lib/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXau.so.6 Reading symbols from /usr/lib/libpixman-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpixman-1.so.0 Reading symbols from /usr/lib/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXdmcp.so.6 Reading symbols from /lib/libgcrypt.so.11...(no debugging symbols found)...done. Loaded symbols for /lib/libgcrypt.so.11 Reading symbols from /lib/tls/i686/cmov/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libm.so.6 Reading symbols from /lib/tls/i686/cmov/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/librt.so.1 Reading symbols from /lib/tls/i686/cmov/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libc.so.6 Reading symbols from /lib/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libz.so.1 Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /usr/lib/libfreetype.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libfreetype.so.6 Reading symbols from /lib/libbz2.so.1.0...(no debugging symbols found)...done. Loaded symbols for /lib/libbz2.so.1.0 Reading symbols from /usr/lib/libfontenc.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libfontenc.so.1 Reading symbols from /lib/libgpg-error.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libgpg-error.so.0 Reading symbols from /lib/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libgcc_s.so.1 Reading symbols from /usr/lib/xorg/modules/extensions/libextmod.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/libextmod.so" does not match "/usr/lib/xorg/modules/extensions/libextmod.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/libextmod.so" does not match "/usr/lib/xorg/modules/extensions/libextmod.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libextmod.so Reading symbols from /usr/lib/xorg/modules/extensions/libdbe.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/libdbe.so" does not match "/usr/lib/xorg/modules/extensions/libdbe.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/libdbe.so" does not match "/usr/lib/xorg/modules/extensions/libdbe.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libdbe.so Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/libglx.so" does not match "/usr/lib/xorg/modules/extensions/libglx.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/libglx.so" does not match "/usr/lib/xorg/modules/extensions/libglx.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libglx.so Reading symbols from /usr/lib/xorg/modules/extensions/librecord.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/librecord.so" does not match "/usr/lib/xorg/modules/extensions/librecord.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/librecord.so" does not match "/usr/lib/xorg/modules/extensions/librecord.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/librecord.so Reading symbols from /usr/lib/xorg/modules/extensions/libdri.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/libdri.so" does not match "/usr/lib/xorg/modules/extensions/libdri.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/libdri.so" does not match "/usr/lib/xorg/modules/extensions/libdri.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libdri.so Reading symbols from /lib/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libdrm.so.2 Reading symbols from /usr/lib/xorg/modules/extensions/libdri2.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/extensions/libdri2.so" does not match "/usr/lib/xorg/modules/extensions/libdri2.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/extensions/libdri2.so" does not match "/usr/lib/xorg/modules/extensions/libdri2.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libdri2.so Reading symbols from /usr/lib/xorg/modules/drivers/ati_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/drivers/ati_drv.so Reading symbols from /usr/lib/xorg/modules/drivers/radeon_drv.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/drivers/radeon_drv.so...done. done. Loaded symbols for /usr/lib/xorg/modules/drivers/radeon_drv.so Reading symbols from /lib/libdrm_radeon.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libdrm_radeon.so.1 Reading symbols from /usr/lib/xorg/modules/drivers/vesa_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/drivers/vesa_drv.so Reading symbols from /usr/lib/xorg/modules/drivers/fbdev_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/drivers/fbdev_drv.so Reading symbols from /usr/lib/xorg/modules/linux/libfbdevhw.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/linux/libfbdevhw.so" does not match "/usr/lib/xorg/modules/linux/libfbdevhw.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/linux/libfbdevhw.so" does not match "/usr/lib/xorg/modules/linux/libfbdevhw.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/linux/libfbdevhw.so Reading symbols from /usr/lib/xorg/modules/libfb.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/libfb.so" does not match "/usr/lib/xorg/modules/libfb.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/libfb.so" does not match "/usr/lib/xorg/modules/libfb.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/libfb.so Reading symbols from /usr/lib/xorg/modules/libexa.so...warning: the debug information found in "/usr/lib/debug//usr/lib/xorg/modules/libexa.so" does not match "/usr/lib/xorg/modules/libexa.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/xorg/modules/libexa.so" does not match "/usr/lib/xorg/modules/libexa.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/libexa.so Reading symbols from /usr/lib/dri/radeon_dri.so...warning: the debug information found in "/usr/lib/debug//usr/lib/dri/radeon_dri.so" does not match "/usr/lib/dri/radeon_dri.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/dri/radeon_dri.so" does not match "/usr/lib/dri/radeon_dri.so" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/dri/radeon_dri.so Reading symbols from /lib/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libexpat.so.1 Reading symbols from /usr/lib/xorg/modules/input/evdev_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/input/evdev_drv.so Reading symbols from /usr/lib/xorg/modules/input/synaptics_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/input/synaptics_drv.so Reading symbols from /lib/tls/i686/cmov/libnss_compat.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libnss_compat.so.2 Reading symbols from /lib/tls/i686/cmov/libnsl.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libnsl.so.1 Reading symbols from /lib/tls/i686/cmov/libnss_nis.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libnss_nis.so.2 Reading symbols from /lib/tls/i686/cmov/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libnss_files.so.2 0x006dd422 in __kernel_vsyscall () (gdb) cont Continuing. Program received signal SIGSEGV, Segmentation fault. 0x0024afc6 in ?? () from /lib/tls/i686/cmov/libc.so.6 (gdb) backtrace full #0 0x0024afc6 in ?? () from /lib/tls/i686/cmov/libc.so.6 No symbol table info available. #1 0x00000000 in ?? () No symbol table info available. (gdb) info registers eax 0x0 0 ecx 0xcb 203 edx 0xb6db2000 -1227153408 ebx 0x5aaff4 5943284 esp 0xbfac0198 0xbfac0198 ebp 0xbfac01d8 0xbfac01d8 esi 0x0 0 edi 0xb6db2000 -1227153408 eip 0x24afc6 0x24afc6 eflags 0x213246 [ PF ZF IF #12 #13 RF ID ] cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 (gdb) x/16i $pc => 0x24afc6: rep movsl %ds:(%esi),%es:(%edi) 0x24afc8: mov %eax,%ecx 0x24afca: rep movsb %ds:(%esi),%es:(%edi) 0x24afcc: pop %eax 0x24afcd: mov %eax,%edi 0x24afcf: mov %edx,%esi 0x24afd1: mov 0x4(%esp),%eax 0x24afd5: ret 0x24afd6: shr %ecx 0x24afd8: jae 0x24afdb 0x24afda: movsb %ds:(%esi),%es:(%edi) 0x24afdb: shr %ecx 0x24afdd: jae 0x24afe1 0x24afdf: movsw %ds:(%esi),%es:(%edi) 0x24afe1: rep movsl %ds:(%esi),%es:(%edi) 0x24afe3: jmp 0x24afcd (gdb) therread apply all backtrace Thread 1 (Thread 0xb77b36c0 (LWP 32397)): #0 0x0024afc6 in ?? () from /lib/tls/i686/cmov/libc.so.6 #1 0x00000000 in ?? () (gdb) quit A debugging session is active. Inferior 1 [process 32397] will be detached. Quit anyway? (y or n) Detaching from program: /usr/bin/Xorg, process 32397