From Lee, Damon (Damon.Lee@data61.csiro.au)

Hi Benjamin,

Sorry to be emailing you directly, I have not subscribed to the mailing list yet so I am emailing you directly to avoid breaking the threading of the list.

As for your question (http://sel4.systems/pipermail/devel/2019-April/002346.html), the reason you are receiving those linker issues is because the IOMMU related functions are not being compiled and linked in.

This is because of the fact that the simulation option is turned on. We do not have support for the IOMMU in simulation mode.

So to resolve this problem, turn off the SIMULATION flag using ccmake or similar and make sure the KernelIOMMU flag is turned on as well.

This solution is assuming that the resulting image will be run on hardware. As for simulating on QEMU, I cannot help you there as most of the development has been on actual hardware and not on QEMU.

PS: If possible, could you help me reply to the thread so others will be able to see this?

Sincerely,

Damon

Von: Devel [devel-bounces@sel4.systems]" im Auftrag von "KAP Benjamin [benjamin.kap.001@student.uni.lu]
Gesendet: Donnerstag, 25. April 2019 21:00
An: devel@sel4.systems
Betreff: [seL4] Undefined Reference iommu dma

Hello

I have a linking problem in the picoserver CAmkES-application which was added 2 days ago.

Steps I did:

1) repo init -u https://github.com/seL4/camkes-manifest.git

2) repo sync

3) start docker container

4) (in new subfolder) ../init-build.sh -DPLATFORM=x86_64 -DSIMULATION=1 -DCAMKES_APP=picoserver

(side note: aborts because picotcp folder is missing in projects folder, but that's easy fixed)

5) ninja

Error:

[5/16] Linking C executable projects/camkes/ethdriver.instance.bin
FAILED: projects/camkes/ethdriver.instance.bin
: && ccache /usr/bin/gcc --sysroot=/host/test -m64 -march=nehalem -D__KERNEL_64__ -g -march=nehalem -D__KERNEL_64__ -Wl,-m -Wl,elf_x86_64 -static -nostdlib -z max-page-size=0x1000 -static -nostdlib -u _camkes_start -e _camkes_start -Wl,--script=/host/test/projects/camkes/ethdriver/linker.lds /host/test/lib/crt1.o /host/test/lib/crti.o /usr/lib/gcc/x86_64-linux-gnu/6/crtbegin.o projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/__/global-components/components/Ethdriver/src/ethdriver.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/__/global-components/components/Ethdriver/src/plat/pc99/common.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/__/global-components/components/Ethdriver/src/plat/pc99/82574.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/camkes.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/camkes.simple.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/camkes.environment.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/EthDriver_seL4HardwareMMIO_0.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/irq_seL4HardwareInterrupt_0.c.obj projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/ethdriver/client_seL4Ethdriver_0.c.obj -lgcc -lgcc_eh libsel4/libsel4.a projects/camkes-tool/libsel4camkes/libsel4camkes.a projects/seL4_libs/libsel4sync/libsel4sync.a projects/util_libs/libutils/libutils.a projects/seL4_libs/libsel4vka/libsel4vka.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/util_libs/libplatsupport/libplatsupport.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4muslcsys/libsel4muslcsys.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4vka/libsel4vka.a projects/seL4_libs/libsel4allocman/libsel4allocman.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4simple/libsel4simple.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/util_libs/libethdrivers/libethdrivers.a projects/projects_libs/libvirtqueue/libvirtqueue.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/seL4_libs/libsel4simple-default/libsel4simple-default.a projects/seL4_libs/libsel4debug/libsel4debug.a projects/seL4_libs/libsel4simple/libsel4simple.a projects/util_libs/libelf/libelf.a projects/util_libs/libcpio/libcpio.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4vka/libsel4vka.a libsel4/libsel4.a projects/util_libs/libplatsupport/libplatsupport.a projects/util_libs/libutils/libutils.a projects/musllibc/build-temp/lib/libc.a projects/util_libs/libpicotcp/picotcp_external/picotcp/build//lib/libpicotcp.a -lgcc -lgcc_eh libsel4/libsel4.a projects/camkes-tool/libsel4camkes/libsel4camkes.a projects/seL4_libs/libsel4sync/libsel4sync.a projects/util_libs/libutils/libutils.a projects/seL4_libs/libsel4vka/libsel4vka.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/util_libs/libplatsupport/libplatsupport.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4muslcsys/libsel4muslcsys.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4vka/libsel4vka.a projects/seL4_libs/libsel4allocman/libsel4allocman.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4simple/libsel4simple.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/util_libs/libethdrivers/libethdrivers.a projects/projects_libs/libvirtqueue/libvirtqueue.a projects/seL4_libs/libsel4utils/libsel4utils.a projects/seL4_libs/libsel4platsupport/libsel4platsupport.a projects/seL4_libs/libsel4simple-default/libsel4simple-default.a projects/seL4_libs/libsel4debug/libsel4debug.a projects/seL4_libs/libsel4simple/libsel4simple.a projects/util_libs/libelf/libelf.a projects/util_libs/libcpio/libcpio.a projects/seL4_libs/libsel4vspace/libsel4vspace.a projects/seL4_libs/libsel4vka/libsel4vka.a libsel4/libsel4.a projects/util_libs/libplatsupport/libplatsupport.a projects/util_libs/libutils/libutils.a projects/musllibc/build-temp/lib/libc.a projects/util_libs/libpicotcp/picotcp_external/picotcp/build//lib/libpicotcp.a /usr/lib/gcc/x86_64-linux-gnu/6/crtend.o /host/test/lib/crtn.o -o projects/camkes/ethdriver.instance.bin && :

/usr/bin/ld: projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/__/global-components/components/Ethdriver/src/plat/pc99/common.c.obj: in function `camkes_iommu_dma_alloc':
/host/test/../projects/global-components/components/Ethdriver/src/plat/pc99/common.c:48: undefined reference to `sel4utils_iommu_dma_alloc_iospace'
/usr/bin/ld: projects/camkes/CMakeFiles/ethdriver.instance.bin.dir/__/global-components/components/Ethdriver/src/plat/pc99/common.c.obj: in function `pc99_eth_setup':
/host/test/../projects/global-components/components/Ethdriver/src/plat/pc99/common.c:71: undefined reference to `simple_get_iospace'
/usr/bin/ld: /host/test/../projects/global-components/components/Ethdriver/src/plat/pc99/common.c:88: undefined reference to `sel4utils_make_iommu_dma_alloc'

I checked all the files in the Ethdriver component and for me it seems that all should be fine, thus I cannot find/see the error (or the missing configuration).

(The only file I edited was picoserver.camkes but that is irrelevant.)

Any help/hint would be very appreciated.

Best regards,

Benjamin