Hello all DOSEMU gurus, I encounter weird problem with DOSEMU when trying run it on Fedora 14 i386 - althougt machines are roughly same (HW: P4+/2-4GB RAM/max 3 years old, SW: Fedora 14 i686 up-to-date), on some (6 of these i tried) PCs dosemu seems work fine, on others (i found 5 pieces) dosemu crashes on SIGSEGV shortly after start, in its initialization phase. All PCs are installed from same RPM package, which I compile on one of this PCs, then dosemu/freedos part is at all PCs same too. On all machines dosemu run in vm86 mode ($_cpu_emu = "off", and vm.mmap_min_addr = 0). I tried built dosemu both with dynamically loaded plugins and without them, dosemu behavior not changed. After i add some debug messages to several dosemu modules, dosemu on those five machines crashes in slightly different point, and on six remaining machines work still fine. Unfortunately I'm not C programmer and have no idea how debug and solve this problem. For me this appear as dosemu somewhere before overwrite part its memory. Or maybe want some illegal access to pages which was previously locked by mprotect(). But I not know which is right way for solving this issue, know it anyone? When I run dosemu under gdb, on PCs where it crashes i'm getting this output (sorry for it's length): $ gdb dosemu.bin GNU gdb (GDB) Fedora (7.2-26.fc14) Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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 "i686-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/dosemu.bin...Reading symbols from /usr/lib/debug/usr/bin/dosemu.bin.debug...done. done. (gdb) run -D +9a -O Starting program: /usr/bin/dosemu.bin -D +9a -O [Thread debugging using libthread_db enabled] using stderr for debug-output major = 136 minor = 8 CONF: config variable parser_version_3 set CONF: config variable c_system set CONF: Parsing built-in dosemu.conf file. CONF: config variable version_3_style_used set CONF: Parsing built-in global.conf file. Detaching after fork from child process 17738. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17740. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17742. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17744. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. CONF: config variable version_3_style_used unset CONF: config variable version_3_style_used set CONF: opened include file /etc/dosemu/dosemu.conf CONF: closed include file /etc/dosemu/dosemu.conf Detaching after fork from child process 17746. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. CONF: mapping driver = 'auto' debug flags: +9a CONF: Disabling use of pentium timer CONF: dosbanner on CONF: timer freq=18, update=54925 CONF: CPU set to 586 CONF: 2048k bytes EMS memory CONF: EMS-frame = 0xe400 CONF: DPMI-Server on (0x5000) CONF: DPMI base addr = 0xffffffff CONF: PM DOS API Translator on CONF: No DJGPP NULL deref checks: off CONF: dosemu running on _xterm CONF: time mode = 'bios' SER: directory /var/lock namestub LCK.. binary No MOUSE: no device specified, type 0 using internaldriver: yes, emulate3buttons: no baudrate: 0 CONF: Keyboard-layout keyb-user Detaching after fork from child process 17748. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. CONF: **** Warning: floppy /dev/fd0 not accessable, disabled CONF: fastfloppy = 1 CONF: IPX support off CONF(LPT0) f: (null) c: lpr -l t: 20 port: 0 CONF(LPT1) f: (null) c: lpr -l -P lpt2 t: 20 port: 0 CONF: not allowing speaker port access CONF: Packet Driver enabled. Detaching after fork from child process 17750. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17752. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17754. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17756. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. device: /home/hanzlik/.dosemu/drives/c type 4 h: -1 s: -1 t: -1 drive C: Detaching after fork from child process 17758. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17760. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. Detaching after fork from child process 17762. priv.c: priv.drop: uid=500, gid=500. priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. device: /home/hanzlik/.dosemu/drives/d type 4 h: -1 s: -1 t: -1 drive D: CONF: cdrom MSCD0001 on /dev/cdrom CONF: config variable c_system unset debug flags: +9a Linux kernel 2.6.35; CPU speed is 800000000 Hz CONF: mostly running as USER: uid=500 (cached 500) gid=500 (cached 500) U: charset->unicode charset:cp437 00 -> symbol:0020...1 U: charset->unicode charset:cp437 7f -> symbol:2302...1 video_mem_charset=cp437 keyb_config_charset=terminal_cp437 output_charset=default keyb_charset=default dos_charset=cp437 dumping the current runtime configuration: Version: dosemu-1.4.0.1 versioncode = 0x01040001 Running Kernel Version: linux-2.6.35 cpu 586 realcpu 586 CPUclock 800 MHz cpu_spd 0x51eb85 cpu_tick_spd 0x61bed7 pci 0 rdtsc 0 mathco 1 smp 0 cpuspeed 800 mappingdriver auto hdiskboot 1 mem_size 640 ext_mem 8192 ems_size 0x800 ems_frame 0xe400 xms_size 0x0 max_umb 0x0 dpmi 0x5000 dpmi_base 0xffffffff pm_dos_api 1 ignore_djgpp_null_derefs 0 mapped_bios 0 vbios_file vbios_copy 0 vbios_seg 0xc000 vbios_size 0x10000 console_keyb 0 console_video 0 kbd_tty 0 exitearly 0 fdisks 0 hdisks 2 bootdisk 0 term_esc_char 0x1e term_color 1 term_updatefreq 4 X_updatelines 0 X_updatefreq 0 xterm_title X_display "" X_title "(null)" X_icon_name "(null)" X_title_show_appname 0 X_blinkrate 0 X_sharecmap 0 X_mitshm 0 X_fixed_aspect 0 X_aspect_43 0 X_lin_filt 0 X_bilin_filt 0 X_mode13fact 0 X_winsize_x 0 X_winsize_y 0 X_gamma 0 X_fullscreen 0 vgaemu_memsize 0x0 vesamode_list (nil) X_lfb 0 X_pm_interface 0 X_keycode 0 X_font "(null)" X_mgrab_key "(null)" X_background_pause 0 config.X 0 hogthreshold 1 chipset "plainvga" cardtype "VGA" pci_video 1 fullrestore 0 gfxmemsize 256 vga 0 dualmon 0 force_vt_switch 0 speaker "emulated" update 54925 freq 18 tty_lockdir "/var/lock" tty_lockfile "LCK.." config.tty_lockbinary 0 num_ser 0 num_lpt 2 fastfloppy 1 full_file_locks 0 emusys "" emuini "" dosbanner 1 vbios_post 0 detach 0 debugout "" debug_flags "9#9A9C9D9E9I9M9P9Q9R9S9T9W9X9Z9a9c9d9g9h9i9j9k9m9n9p9q9r9s9u9v9w9x" keytable not setup yet pre_stroke "" irqpassing= none hardware_ram: no ipxsup 0 vnet 2 pktflags 0x0 LPT1 command "lpr -l" timeout 20 device "" baseport 0x378 LPT2 command "lpr -l -P lpt2" timeout 20 device "" baseport 0x278 feature_0 0 feature_1 0 feature_2 0 feature_3 0 feature_4 0 feature_5 0 feature_6 0 feature_7 0 feature_8 0 feature_9 0 feature_10 0 feature_11 0 feature_12 0 feature_13 0 feature_14 0 feature_15 0 SOUND: engine 1 sb_base 0x220 sb_dma 1 sb_hdma 5 sb_irq 5 mpu401_base 0x330 sb_dsp "/dev/dsp" sb_mixer "" sound_driver "oss" SOUND_OSS: oss_min_frags 0x4 oss_max_frags 0x20 oss_stalled_frags 0x2 oss_do_post 0 oss_min_extra_frags 0x2 oss_dac_freq 6000 cli_timeout 10 pic_watchdog 50 JOYSTICK: joy_device0 "/dev/js0" joy_device1 "/dev/js1" joy_dos_min 1 joy_dos_max 150 joy_granularity 1 joy_latency 1 TIMER: using new gettimeofday with microsecond resolution DBG_FD already set DOSEMU-1.4.0.1 is coming up on Linux version 2.6.35.9-64.fc14.i686.PAE #1 SMP Fri Dec 3 12:28:00 UTC 2010 i686 Compiled with GCC version 4.5.1 -m32 CONF: reserving 640Kb at 0x00000 for 'd' (Base DOS memory (first 640K)) CONF: reserving 48Kb at 0xF4000 for 'r' (Dosemu reserved area) PIC: cnt lvl pic_isr pic_imr pic_irr (column headers) PIC: 0 --1 00000000 0000fff8 00000000 pic_itime[1]= 00 PIC: 0 -1 00000000 0000fff8 00000000 pic_sys_time set to 107 PIC: 0 -1 00000000 0000fff8 00000000 Activate ++ dos time to 107 PIC: 0 -1 00000000 0000fff8 00000000 pic_sys_time is 107 PORT: registered "Math Coprocessor" handle 0x06 [0x00f0-0x00ff] fd=-1 INT21: rv_all: 1 + 0 = 1 PORT: registered "8254 Timer0" handle 0x07 [0x0040-0x0040] fd=-1 PORT: registered "8254 Timer1" handle 0x08 [0x0041-0x0041] fd=-1 PORT: registered "8254 Timer2" handle 0x09 [0x0042-0x0042] fd=-1 PORT: registered "8254 Ctrl02" handle 0x0a [0x0043-0x0043] fd=-1 PIC: 0 -1 00000000 0000fff8 00000000 Requested irq lvl 01 successfully PIC: 0 -1 00000000 0000fff8 00000002 Zeroing vm86, DPMI from 00, k0 VID: Video set to Video_term VID: config.dualmon=0 SCREEN saves at: 0x8637b00 of 65280 size CONF: reserving 128Kb at 0xA0000 for 'v' (Video memory) PORT: registered "8042 Keyboard data" handle 0x0b [0x0060-0x0060] fd=-1 PORT: registered "8042 Keyboard command" handle 0x0c [0x0064-0x0064] fd=-1 PORT: registered "Keyboard controller port B" handle 0x0d [0x0061-0x0061] fd=-1 mapfile.c:open_mapping_f mpool (min 4160K) is 8256 Kbytes at 0xb75d3000-0xb7de2fff MAPPING: using the Posix SHM mapping driver DOS+HMA memory area being mapped in MAPPING: alloc, cap= INIT_LOWRAM, source=0 MAPPING: alloc, cap= INIT_LOWRAM, mapsize=110000 mapping.c:mprotect_mapping: cap=512, addr=0xb75d3000, size=110000, protect=0x3. mapping.c:mprotect_mapping:po mprotect: ij=0. mapping.c: alloc_mapping: LOWRAM_INIT, cap= INIT_LOWRAM, base=0xb75d3000 mapping.c: alias_mapping, cap= INIT_LOWRAM, target=(nil), size=110000, protect=7, source=0xb75d3000 mapfile.c: alias_mapping_file target=(nil), mapsize=110000, protect=0x7, fixed=0x10, fd=8, offs=0. mapfile.c: alias_mapping_file pred return, fileoffs 0 to (nil) size 110000, result (nil) init.c:low_mem_init: po alloc_mapping result=(nil). init.c:low_mem_init: pred mprotect_mapping: result=(nil), config.mem_size=280. mapping.c:mprotect_mapping: cap=131072, addr=(nil), size=a0000, protect=0x0. mapping.c:mprotect_mapping:po mprotect: ij=0. init.c:low_mem_init: po mprotect_mapping+return : result=(nil), config.mem_size=280. emu.c: pred priv_drop: priv.c: priv.drop: uid=500, gid=500. Program received signal SIGSEGV, Segmentation fault. _dl_lookup_symbol_x (undef_name=0x804abb3 "setreuid", undef_map=0x123900, ref=0xbffef4d0, symbol_scope=0x123ab8, version=0xb7fe5438, type_class=1, flags=1, skip_map=0x0) at dl-lookup.c:713 713 { (gdb) bt #0 _dl_lookup_symbol_x (undef_name=0x804abb3 "setreuid", undef_map=0x123900, ref=0xbffef4d0, symbol_scope=0x123ab8, version=0xb7fe5438, type_class=1, flags=1, skip_map=0x0) at dl-lookup.c:713 #1 0x00110c98 in _dl_fixup (l=<value optimized out>, reloc_arg=<value optimized out>) at dl-runtime.c:118 #2 0x001174f0 in _dl_runtime_resolve () at ../sysdeps/i386/dl-trampoline.S:37 #3 0x080886f7 in priv_drop () at priv.c:187 #4 0x0804e616 in main (argc=4, argv=0xbffff5f4) at emu.c:404 (gdb) On PC where dosemu works, debug output continues as: priv.c: priv.drop return: skip_priv_setting=1, can_do_root_stuff=0. emu.c: pred map_hardware_ram: Mapping VBIOS = 0 Entering HMA_MAP with HMA=0 MAPPING: unmap, cap= HMA, addr=0x100000, size=10000 HMA: detached at 0x100000 mapping.c:mmap_mapping: map, cap= HMA, target=0x100000, mapsize=10000, protect=7, source=0 mapfile.c: alias_mapping_file target=0x100000, mapsize=10000, protect=0x7, fixed=0x10, fd=8, offs=0. ... DOSEMU was configured as: ./configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --program prefix= --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc/dosemu --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-fdtarball=/home/hanzlik/src/rpm/SOURCES/dosemu-freedos-1.0-bin.tgz --disable-dlplugins --with-svgalib --target=i686 --with-gpm --enable-debug --with-alsa --with-sndfile --with-x --with-slang --with-target-cpu=i686 --disable-cpuemu --disable-aspi Has someone any idea? What should I tried here? Thanks in advance, Franta HanzlÃk -- To unsubscribe from this list: send the line "unsubscribe linux-msdos" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
