(gdb) bt #0 0x00007f94ea828cd7 in ioctl () from /lib/libc.so.6 #1 0x00007f94e9801343 in drmIoctl () from /usr/lib/libdrm.so.2 #2 0x00007f94e9801557 in drmGetLock () from /usr/lib/libdrm.so.2 #3 0x00007f94e3778af8 in radeonGetLock () from /usr/lib/dri/r300_dri.so #4 0x00007f94e377d4f2 in r300_mem_use () from /usr/lib/dri/r300_dri.so #5 0x00007f94e379d65f in r300UseArrays () from /usr/lib/dri/r300_dri.so #6 0x00007f94e378bb92 in ?? () from /usr/lib/dri/r300_dri.so #7 0x00007f94e381e43f in _tnl_run_pipeline () from /usr/lib/dri/r300_dri.so #8 0x00007f94e381ea00 in _tnl_draw_prims () from /usr/lib/dri/r300_dri.so #9 0x00007f94e381747e in ?? () from /usr/lib/dri/r300_dri.so #10 0x000000000053c96b in ?? () #11 0x00000000005403e0 in ?? () #12 0x00000000005459b4 in ?? () #13 0x00000000004887af in ?? () #14 0x000000000048004c in ?? () #15 0x000000000057a861 in ?? () #16 0x000000000057dbce in ?? () #17 0x000000000057dc93 in ?? () #18 0x00007f94ea7695a6 in __libc_start_main () from /lib/libc.so.6 #19 0x000000000040a639 in ?? () #20 0x00007ffff54a7458 in ?? () #21 0x000000000000001c in ?? () #22 0x0000000000000001 in ?? () #23 0x00007ffff54a8c0d in ?? () #24 0x0000000000000000 in ?? () (gdb) info sharedlibrary From To Syms Read Shared Object Library 0x00007f94ed02b7f0 0x00007f94ed064c38 Yes /usr/lib/libGL.so.1 0x00007f94ecd790d0 0x00007f94ecdca3b8 Yes /usr/lib/libSDL-1.2.so.0 0x00007f94ecb3ac50 0x00007f94ecb662c8 Yes /usr/lib/libcurl-gnutls.so.4 0x00007f94ec8836b0 0x00007f94ec91f418 Yes /usr/lib/libode.so.0debian1 0x00007f94ec642310 0x00007f94ec65d698 Yes /usr/lib/liblua5.1.so.0 0x00007f94ec437720 0x00007f94ec43a258 Yes /usr/lib/libSDL_ttf-2.0.so.0 0x00007f94ec2334e0 0x00007f94ec234738 Yes /usr/lib/libSDL_net-1.2.so.0 0x00007f94ebfdbbd0 0x00007f94ebff5c58 Yes /usr/lib/libSDL_mixer-1.2.so.0 0x00007f94ebd65cd0 0x00007f94ebdbd8c8 Yes /usr/lib/libGLU.so.1 0x00007f94ebb517f0 0x00007f94ebb5dc28 Yes /lib/libbz2.so.1.0 0x00007f94eb92df20 0x00007f94eb947d58 Yes /usr/lib/libpng12.so.0 0x00007f94eb7098a0 0x00007f94eb721d08 Yes /usr/lib/libjpeg.so.62 0x00007f94eb4f0200 0x00007f94eb4fd2d8 Yes /lib/libz.so.1 0x00007f94eb26ec60 0x00007f94eb2d7978 Yes /usr/lib/libsqlite3.so.0 0x00007f94eafb08a0 0x00007f94eb027246 Yes /usr/lib/libstdc++.so.6 0x00007f94eacd8e50 0x00007f94ead1b3e8 Yes /lib/libm.so.6 0x00007f94eaabfc60 0x00007f94eaad0cc8 Yes /lib/libgcc_s.so.1 0x00007f94ea769230 0x00007f94ea86e0e8 Yes /lib/libc.so.6 0x00007f94ea534240 0x00007f94ea53fa08 Yes /lib/libpthread.so.0 0x00007f94ea242bd0 0x00007f94ea2d0168 Yes /usr/lib/libX11.so.6 0x00007f94ea019970 0x00007f94ea024a18 Yes /usr/lib/libXext.so.6 0x00007f94e9e10f10 0x00007f94e9e13f38 Yes /usr/lib/libXxf86vm.so.1 0x00007f94e9c0eae0 0x00007f94e9c0f648 Yes /usr/lib/libXdamage.so.1 0x00007f94e9a0a320 0x00007f94e9a0cf18 Yes /usr/lib/libXfixes.so.3 0x00007f94e9801000 0x00007f94e9805828 Yes /usr/lib/libdrm.so.2 0x00007f94e95fadb0 0x00007f94e95fb9d8 Yes /lib/libdl.so.2 0x00007f94e93ec180 0x00007f94e93f4d48 Yes /usr/lib/libpulse-simple.so.0 0x00007f94e9191fd0 0x00007f94e91cf6e8 Yes /usr/lib/libpulse.so.0 0x00007f94e8f22d40 0x00007f94e8f731d8 Yes /usr/lib/libdirectfb-1.0.so.0 0x00007f94e8d0e870 0x00007f94e8d11e68 Yes /usr/lib/libfusion-1.0.so.0 0x00007f94e8af9fe0 0x00007f94e8b068c8 Yes /usr/lib/libdirect-1.0.so.0 0x00007f94e88c61f0 0x00007f94e88ca778 Yes /usr/lib/libidn.so.11 0x00007f94e86b6ba0 0x00007f94e86bee18 Yes /usr/lib/liblber-2.4.so.2 0x00007f94e84786b0 0x00007f94e84a40e8 Yes /usr/lib/libldap_r-2.4.so.2 0x00007f94e8265170 0x00007f94e8268978 Yes /lib/librt.so.1 0x00007f94e803c1e0 0x00007f94e805c458 Yes /usr/lib/libgssapi_krb5.so.2 0x00007f94e7da8d80 0x00007f94e7e13658 Yes /usr/lib/libgnutls.so.26 0x00007f94e7b799c0 0x00007f94e7b851a8 Yes /usr/lib/libtasn1.so.3 0x00007f94e7918100 0x00007f94e7957878 Yes /lib/libgcrypt.so.11 0x00007f94e7696790 0x00007f94e76ee9f8 Yes /usr/lib/libfreetype.so.6 0x00007f94e744b800 0x00007f94e747cac8 Yes /usr/lib/libmikmod.so.2 0x00007f94e7239fe0 0x00007f94e723ddf8 Yes /usr/lib/libvorbisfile.so.3 0x00007f94e6fe4570 0x00007f94e700b368 Yes /usr/lib/libsmpeg-0.4.so.0 0x00007f94ed288a90 0x00007f94ed2a1344 Yes /lib64/ld-linux-x86-64.so.2 0x00007f94e6dc9f80 0x00007f94e6dd5608 Yes /usr/lib/libxcb.so.1 0x00007f94e6bbede0 0x00007f94e6bbfb28 Yes /usr/lib/libXau.so.6 0x00007f94e69b6cc0 0x00007f94e69bb768 Yes /usr/lib/libSM.so.6 0x00007f94e679f410 0x00007f94e67ad088 Yes /usr/lib/libICE.so.6 0x00007f94e6596560 0x00007f94e6598018 Yes /lib/libcap.so.2 0x00007f94e6390680 0x00007f94e63934f8 Yes /usr/lib/libgdbm.so.3 0x00007f94e617a8a0 0x00007f94e6187c58 Yes /lib/libresolv.so.2 0x00007f94e5f613d0 0x00007f94e5f717b8 Yes /usr/lib/libsasl2.so.2 0x00007f94e5cd6500 0x00007f94e5d466c8 Yes /usr/lib/libkrb5.so.3 0x00007f94e5aa1f80 0x00007f94e5ab5d98 Yes /usr/lib/libk5crypto.so.3 0x00007f94e589a290 0x00007f94e589adc8 Yes /lib/libcom_err.so.2 0x00007f94e5692cc0 0x00007f94e5696958 Yes /usr/lib/libkrb5support.so.0 0x00007f94e548eb30 0x00007f94e548f118 Yes /lib/libkeyutils.so.1 0x00007f94e528b880 0x00007f94e528bd18 Yes /lib/libgpg-error.so.0 0x00007f94e5061680 0x00007f94e50791b8 Yes /usr/lib/libvorbis.so.0 0x00007f94e4e5a1d0 0x00007f94e4e5bbe8 Yes /usr/lib/libXdmcp.so.6 0x00007f94e4c555a0 0x00007f94e4c56a68 Yes /lib/libuuid.so.1 0x00007f94e4a50170 0x00007f94e4a52288 Yes /lib/libattr.so.1 0x00007f94e484a540 0x00007f94e484c358 Yes /usr/lib/libogg.so.0 0x00007f94e45c0c20 0x00007f94e45c5818 Yes /usr/lib/libXcursor.so.1 0x00007f94e43b5a70 0x00007f94e43bbf18 Yes /usr/lib/libXrender.so.1 0x00007f94e376f8b0 0x00007f94e390ef78 Yes /usr/lib/dri/r300_dri.so 0x00007f94e351ec10 0x00007f94e3538318 Yes /usr/lib/libexpat.so.1 0x00007f94d4a22020 0x00007f94d4a29c48 Yes /lib/libnss_files.so.2 0x00007f94d3559b70 0x00007f94d355a848 Yes /lib/libnss_mdns4_minimal.so.2 0x00007f94d3353fe0 0x00007f94d33574b8 Yes /lib/libnss_dns.so.2 0x00007f94d3150c30 0x00007f94d31519d8 Yes /lib/libnss_mdns4.so.2 (gdb) bt #0 0x00007f94ea828cd7 in ioctl () from /lib/libc.so.6 #1 0x00007f94e9801343 in drmIoctl () from /usr/lib/libdrm.so.2 #2 0x00007f94e9801557 in drmGetLock () from /usr/lib/libdrm.so.2 #3 0x00007f94e3778af8 in radeonGetLock () from /usr/lib/dri/r300_dri.so #4 0x00007f94e377d4f2 in r300_mem_use () from /usr/lib/dri/r300_dri.so #5 0x00007f94e379d65f in r300UseArrays () from /usr/lib/dri/r300_dri.so #6 0x00007f94e378bb92 in ?? () from /usr/lib/dri/r300_dri.so #7 0x00007f94e381e43f in _tnl_run_pipeline () from /usr/lib/dri/r300_dri.so #8 0x00007f94e381ea00 in _tnl_draw_prims () from /usr/lib/dri/r300_dri.so #9 0x00007f94e381747e in ?? () from /usr/lib/dri/r300_dri.so #10 0x000000000053c96b in ?? () #11 0x00000000005403e0 in ?? () #12 0x00000000005459b4 in ?? () #13 0x00000000004887af in ?? () #14 0x000000000048004c in ?? () #15 0x000000000057a861 in ?? () #16 0x000000000057dbce in ?? () #17 0x000000000057dc93 in ?? () #18 0x00007f94ea7695a6 in __libc_start_main () from /lib/libc.so.6 #19 0x000000000040a639 in ?? () #20 0x00007ffff54a7458 in ?? () #21 0x000000000000001c in ?? () #22 0x0000000000000001 in ?? () #23 0x00007ffff54a8c0d in ?? () #24 0x0000000000000000 in ?? () (gdb) info registers rax 0xfffffffffffffe00 -512 rbx 0x1611740 23140160 rcx 0xffffffffffffffff -1 rdx 0x7ffff54a6cd0 140737308683472 rsi 0x4008642a 1074291754 rdi 0x9 9 rbp 0x7ffff54a6cd0 0x7ffff54a6cd0 rsp 0x7ffff54a6c98 0x7ffff54a6c98 r8 0x1614090 23150736 r9 0x16165d0 23160272 r10 0x0 0 r11 0x246 582 r12 0x4008642a 1074291754 r13 0x9 9 r14 0x0 0 r15 0x1975000 26693632 rip 0x7f94ea828cd7 0x7f94ea828cd7 eflags 0x246 [ PF ZF IF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 fctrl 0x37f 895 fstat 0x220 544 ftag 0xffff 65535 fiseg 0x0 0 fioff 0x0 0 foseg 0x0 0 fooff 0x0 0 fop 0x0 0 mxcsr 0x9fe0 [ PE DAZ IM DM ZM OM UM PM FZ ] (gdb) disassemble Dump of assembler code for function ioctl: 0x00007f94ea828cd0 : mov $0x10,%eax 0x00007f94ea828cd5 : syscall 0x00007f94ea828cd7 : cmp $0xfffffffffffff001,%rax 0x00007f94ea828cdd : jae 0x7f94ea828ce0 0x00007f94ea828cdf : retq 0x00007f94ea828ce0 : mov 0x28e2a9(%rip),%rcx # 0x7f94eaab6f90 0x00007f94ea828ce7 : xor %edx,%edx 0x00007f94ea828ce9 : sub %rax,%rdx 0x00007f94ea828cec : mov %edx,%fs:(%rcx) 0x00007f94ea828cef : or $0xffffffffffffffff,%rax 0x00007f94ea828cf3 : jmp 0x7f94ea828cdf End of assembler dump.