l4-hackers May 2007

l4-hackers@os.inf.tu-dresden.de

19 participants
42 discussions

L4Linux without L4Loader
by Daniel Vandersee 06 May '07

06 May '07

Hi there, I wonder if it is possible to start L4Linux (possibly with some modifications) whether from GRUB directly or from a different loader than l4-loader. Is there a particular reason why L4Linux is linked against libloader.s.so? If it would not work out of the box: What has to be neccessarily provided by that (new) loader in oder to achieve that goal? Furthermore I did not manage to link L4Linux without libloader. I tried to replace libloader by those libs that were included by libloader itself, but always get undefined references: > arch/l4/kernel/built-in.o: In function `l4env_phys_to_virt': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:200: multiple definition of `l4env_infopage' > ../l4/lib/x86_586/l4v2/libl4env.p.a(startup.s.o):/home/user/src/otc_snapshot/l4/pkg/l4env/lib/src/startup.c:59: first defined here > lib/lib.a(string.o): In function `memcmp': > /home/user/src/otc_snapshot/l4linux-2.6/lib/string.c:553: multiple definition of `memcmp' > arch/l4/kernel/built-in.o:/home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/helper_dyn.c:43: first defined here > ld: Warning: size of symbol `memcmp' changed from 41 in arch/l4/kernel/built-in.o to 43 in lib/lib.a(string.o) > lib/lib.a(vsprintf.o): In function `vsnprintf': > /home/user/src/otc_snapshot/l4linux-2.6/lib/vsprintf.c:258: multiple definition of `vsnprintf' > ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o):/home/user/src/otc_snapshot/l4/pkg/log/lib/src/sprintf.c:46: first defined here > ld: Warning: size of symbol `vsnprintf' changed from 38 in ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o) to 1337 in lib/lib.a(vsprintf.o) > lib/lib.a(vsprintf.o): In function `snprintf': > /home/user/src/otc_snapshot/l4linux-2.6/lib/vsprintf.c:537: multiple definition of `snprintf' > ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o):/home/user/src/otc_snapshot/l4/pkg/log/lib/src/sprintf.c:33: first defined here > ld: Warning: size of symbol `snprintf' changed from 39 in ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o) to 40 in lib/lib.a(vsprintf.o) > lib/lib.a(vsprintf.o): In function `vsprintf': > /home/user/src/otc_snapshot/l4linux-2.6/lib/vsprintf.c:587: multiple definition of `vsprintf' > ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o):/home/user/src/otc_snapshot/l4/pkg/log/lib/src/sprintf.c:42: first defined here > ld: Warning: size of symbol `vsprintf' changed from 35 in ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o) to 41 in lib/lib.a(vsprintf.o) > lib/lib.a(vsprintf.o): In function `sprintf': > /home/user/src/otc_snapshot/l4linux-2.6/lib/vsprintf.c:604: multiple definition of `sprintf' > ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o):/home/user/src/otc_snapshot/l4/pkg/log/lib/src/sprintf.c:24: first defined here > ld: Warning: size of symbol `sprintf' changed from 36 in ../l4/lib/x86_586/l4v2/liblogserver.p.a(sprintf.s.o) to 41 in lib/lib.a(vsprintf.o) > arch/l4/lib/arch-i386/built-in.o: In function `l4x_proc_init': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/lib/arch-i386/../proc.c:(.text+0x0): multiple definition of `strstr' > arch/l4/kernel/built-in.o:/home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/helper_dyn.c:134: first defined here > ld: Warning: size of symbol `strstr' changed from 112 in arch/l4/kernel/built-in.o to 48 in arch/l4/lib/arch-i386/built-in.o > ../l4/lib/x86_586/l4v2/liblogserver.p.a(doprnt.s.o): In function `LOG_doprnt': > /home/user/src/otc_snapshot/l4/pkg/log/lib/src/doprnt.c:732: undefined reference to `__umoddi3' > /home/user/src/otc_snapshot/l4/pkg/log/lib/src/doprnt.c:733: undefined reference to `__udivdi3' > arch/l4/kernel/built-in.o: In function `setup_l4env_memory': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:(.text+0x2a4): undefined reference to `l4dm_mem_allocate' > arch/l4/kernel/built-in.o: In function `free': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:291: undefined reference to `l4dm_mem_release' > arch/l4/kernel/built-in.o: In function `l4x_map_below_mainmem': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:386: undefined reference to `l4rm_lookup' > arch/l4/kernel/built-in.o: In function `l4x_map_upage_myself': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:439: undefined reference to `l4rm_lookup' > arch/l4/kernel/built-in.o: In function `l4x_map_iomemory_from_sigma0': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:1549: undefined reference to `l4sigma0_map_iomem' > arch/l4/kernel/built-in.o: In function `l4env_virt_to_phys': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:165: undefined reference to `l4dm_mem_phys_addr' > arch/l4/kernel/built-in.o: In function `__cxa_atexit': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:251: undefined reference to `l4rm_lookup' > arch/l4/kernel/built-in.o: In function `l4x_mbm_request_ghost': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:362: undefined reference to `l4rm_area_release' > arch/l4/kernel/built-in.o: In function `l4env_free_initrd_mem': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/kernel/main.c:867: undefined reference to `l4dm_ds_list_all' > arch/l4/l4lxlib/l4env/lib.a(memory.o): In function `l4lx_memory_map_virtual_page': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/memory.c:23: undefined reference to `l4rm_lookup' > arch/l4/l4lxlib/l4env/lib.a(memory.o): In function `l4lx_memory_page_mapped': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/memory.c:66: undefined reference to `l4rm_lookup' > arch/l4/l4lxlib/l4env/lib.a(task.o): In function `l4lx_task_number_allocate': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/task.c:65: undefined reference to `l4ts_allocate_task' > arch/l4/l4lxlib/l4env/lib.a(task.o): In function `l4lx_task_number_free': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/task.c:142: undefined reference to `l4ts_free_task' > arch/l4/l4lxlib/l4env/lib.a(task.o): In function `l4lx_task_create_pager': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/task.c:206: undefined reference to `l4ts_create_task' > arch/l4/l4lxlib/l4env/lib.a(task.o): In function `l4lx_task_delete': > /home/user/src/otc_snapshot/l4linux-2.6/arch/l4/l4lxlib/l4env/task.c:252: undefined reference to `l4ts_kill_task' > ../l4/lib/x86_586/l4v2/libio-ll.a(req_rel.o): In function `l4io_request_mem_region': > /home/user/src/otc_snapshot/l4/pkg/generic_io/lib/clientlib/req_rel.c:70: undefined reference to `l4rm_area_release' > /home/user/src/otc_snapshot/l4/pkg/generic_io/lib/clientlib/req_rel.c:70: undefined reference to `l4rm_area_release' > ../l4/lib/x86_586/l4v2/librtc.a(librtc.o): In function `init_done': > /home/user/src/otc_snapshot/l4/pkg/rtc/lib/client/librtc.c:33: undefined reference to `l4_scaler_tsc_to_ns' > /home/user/src/otc_snapshot/l4/pkg/rtc/lib/client/librtc.c:69: undefined reference to `l4_scaler_tsc_to_us' > /home/user/src/otc_snapshot/l4/pkg/rtc/lib/client/librtc.c:33: undefined reference to `l4_scaler_ns_to_tsc' > ../l4/lib/x86_586/l4v2/librtc.a(librtc.o): In function `l4rtc_get_seconds_since_1970': > /home/user/src/otc_snapshot/build/l4/include/x86/l4/util/rdtsc.h:268: undefined reference to `l4_scaler_tsc_to_ns' > /home/user/src/otc_snapshot/build/l4/include/x86/l4/util/rdtsc.h:268: undefined reference to `l4_scaler_tsc_to_ns' Especially I wasn't able to locate "__umoddi3" and "__udivdi3" in any library except of libloader. I modified l4linux-2.6/arch/l4/kernel/Makefile of the latest OTC snapshot as follows: > L4LIBS = -L$(L4OBJ)/lib/$(L4_MK_ARCH)_$(L4_MK_CPU)/$(L4_MK_API) \ > -L$(L4OBJ)/lib/$(L4_MK_ARCH)_$(L4_MK_CPU) \ > -L$(L4OBJ)/lib \ > -T../../l4/lib/x86_586/main_stat.ld --start-group -lroot.p -lsemaphore.p \ > -lgeneric_ts.p \ > -lloaderif.p \ > -ll4util_root.p \ > -ll4sys.p \ > -lthread.p \ > -ldm_generic.p \ > -ldm_mem.p \ > -ll4env_err.p \ > -ll4env.p \ > -lnames.p \ > -lgeneric_fprov.p \ > -llogserver.p \ > -lnames.p \ > -lc_be_minimal_log_io.p \ > -lc_be_simple_mem.p \ > -lc_be_mmap.p \ > -lc_be_mmap_util.p \ > -luclibc_support.p \ > -lthread.p \ > -lc_be_l4env_start_stop.p \ > -ll4rm.p \ > -lslab.p \ > -ll4util.p -lsigma0.p -llist_alloc.p --end-group \ > $(GCCLIB) Thanks in advance. Kind regards, Daniel

4 6

Fiasco built-in profiling
by Stefan Scheler 06 May '07

06 May '07

Hello, I'm currently trying to get fiasco's built-in profiling working. The problem is, as soon as roottask has been started, an error (mcount: tos overflow) occurs which apparently prevents profiling. Later on no gmon.out.uu is generated. Is that supposed to work? Or what am I doing wrong here? I attached a log showing the error message. From the JDB source code, it sounds like you can enable and disable kernel profiling from JDB. How can this be accomplished? Thanks for any help Stefan L4 Bootstrapper Scaning /bin/fiasco -profile -profstart -nokdb -nowait -serial -comport 1 -serial_esc Scaning /bin/sigma0 Scaning /bin/roottask Bootloader MMAP available [00000000,0009fc00) RAM (1) [0009fc00,000a0000) RAM (1) [000f0000,00100000) reserved (2) [ffb00000,00000000) reserved (2) [00100000,1fff0000) RAM (1) [1fff3000,20000000) ACPI (3) [1fff0000,1fff3000) ACPI NVS (4) Relocated mbi to [0x61000-0x611b3] Loading /bin/fiasco Loading /bin/sigma0 Loading /bin/roottask find kernel info page... found kernel info page at 0x1000 API Version: (87) experimental Sigma0 config ip:00094cd0 sp:00106100 Roottask config ip:00120000 sp:00109528 [00001000-00002000) /bin/fiasco [00002000-00052680) /bin/fiasco [00052680-0005add0) /bin/fiasco [0005b000-0005e861) /bin/fiasco [0005e880-00061000) /bin/fiasco [00090000-00099380) /bin/sigma0 [0009f000-00100000) BIOS area [00100000-00109764) bootstrap [00120000-001345d0) /bin/roottask [00135000-0013f9bb) /bin/roottask [001409c0-002be9f4) /bin/roottask [00300000-003017ec) /bin/fiasco [00302000-0038fce0) /bin/fiasco [03000000-03152c1d) Modules Memory [1fff0000-ffffffff) Deep Space Starting kernel /bin/fiasco at 003007e8 Welcome to Fiasco(ia32)! DD-L4(v2)/x86 microkernel (C) 1998-2006 TU Dresden Rev: Thu Dec 21 08:55:14 2006 compiled with gcc 4.1.1 for Pentium M Performance-critical config option(s) detected: CONFIG_SCHED_RTC is on CONFIG_ASSEMBLER_IPC_SHORTCUT is off CONFIG_PROFILE is on CONFIG_NO_FRAME_PTR is off CONFIG_JDB_ACCOUNTING is on Enabling special fully nested mode for PIC Using the RTC on IRQ 8 (1kHz) for scheduling SERIAL ESC: allocated IRQ 4 for serial uart Absolute KIP Syscalls using: Sysenter CPU: GenuineIntel (F:2:4:9) Model: Pentium 4 (Northwood/Prestonia) at 1992 MHz 64 Entry I TLB (4K or 4M pages) 64 Entry D TLB (4k or 4M pages) 12K µ-ops T Cache (8-way associative) 8 KB L1 D Cache (4-way associative, 64 bytes per line) 512 KB L2 U Cache (8-way associative, 64 bytes per line) Freeing init code/data: 24576 bytes (6 pages) Calibrating timer loop... done. SIGMA0: Hello! KIP @ 1000 Found Fiasco: KIP syscalls: yes allocated 4KB for maintenance structures Roottask. Command line found: "/bin/roottask" mcount: tos overflow 523840kB ( 511MB) total RAM (reported by bootloader) 479676kB ( 469MB) received RAM from Sigma0 1816kB ( 2MB) reserved RAM for RMGR Received I/O ports 0000-ffff Attached irqs = [ <!0> 1 <!2> 3 <!4> 5 6 7 <!8> 9 A B C D E F ] Roottask: Loading 1 module. #05: loading "/bin/hello" from [0312d000-03152c1d] to [01000000-01002eea][01003000-010055c0] entry at 0005b064 via trampoline page code symbols at [1d6fa000-1d6fb000] (4kB), lines at [1d6f7000-1d6fa000] (12kB) hello: My thread-id is 5.0 hello: My thread-id is 5.0 hello: My thread-id is 5.0

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l4-hackers May 2007