Hi,
I realize my issues are far from the current mostly-Sculpt roadmap, but
perhaps someone can throw some light on my problems...at least I'm
dealing with current hardware devoid of parallel ports :o
I've been carefully creating a build structure in base-hw that will
support armv8 and at least AArch64 over the past several months. I'm at
the point where I have made all the architectural additions to support
armv8 and the arm64 assembler which includes support for the assembler
instruction changes from armv7, execution modes, and exception levels
(only EL0 and EL1, initially). Everything builds for a cortex A-53
platform but fails in the final linking steps in two ways as described
below. But first, my build tools are a copy of the Linaro toolchain,
version 6.4.1, which used binutils 2.27, and my CROSS_DEV_PREFIX points
to its location. I'm building in Genode 18.02
1. The final linking step fails initially with the "_impure_ptr" global
not being resolved (see the build output in build_impure.log). Typically
this global is supplied via libc, but Genode's special libc does not
contain it. This global is a pointer to a structure that contains
"errno" from failed C-code execution, along with some concurrency data
for threading, if remember correctly. The pointer is only used in
vterminate.cc which comes from the toolchain. In the currently used
Genode toolchain the library supc++.o contains vterminate.o which is
stripped, so the linker would not complain about the pointer. Is this by
design because the process is about to die anyway when vterminate is
called? To temporarily work around this problem I created a dummy void
* _impure_ptr global in base/lib/cxx/misc.cc. The linker now continues
and eventually completes.
2. The second problem is the size of the executable image files that the
linker produces, several gigabytes! The actual memory image of the
executable appears correct based on a dump of the section header but the
header information shows that the File Offsets to the sections appears
to be based off the link address. For example, in the creation of the
boot image, build_core creates the binary log.bootstrap, the dump of
which is:
objdump -h ../build/dragonboard/var/run/log.bootstrap |more
../build/dragonboard/var/run/log.bootstrap: file format elf64-little
Sections:
Idx Name Size VMA LMA File off Algn
0 .note.gnu.build-id 00000024 0000000000000000 0000000000000000
81042000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
1 .text 0003b840 0000000081000000 0000000081000000
81001000 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
2 .data 00000718 000000008103c000 000000008103c000
8103d000 2**3
CONTENTS, ALLOC, LOAD, DATA
3 .got 000000e0 000000008103c718 000000008103c718
8103d718 2**3
CONTENTS, ALLOC, LOAD, DATA
4 .got.plt 00000018 000000008103c7f8 000000008103c7f8
8103d7f8 2**3
CONTENTS, ALLOC, LOAD, DATA
5 .eh_frame 00003084 000000008103c810 000000008103c810
8103d810 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .gcc_except_table 00000968 000000008103f894 000000008103f894
81040894 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .bss 00008f09 0000000081040200 0000000081040200
810411fc 2**3
ALLOC
It would appear that all the "File off" values are the expected value
plus the bootstrap_link_address which is 0x81000000. Additionally, there
is no stack unwind sections present, that is .ARM.exid/extab.
The linker script being used is base/src/ld/genode.ld, as it should be.
I don't have sufficient knowledge about linker functioning to begin to
understand how the File offset values are determined or how the c++
stack unwind section is added, or not. Any suggestions would be very
helpful.
Thanks,
Bob Stewart
including /Work/Genode/genode-18.02/tool/run/boot_dir/hw
including /Work/Genode/genode-18.02/repos/base/run/log.run
building targets: core init test/log
spawn make core init test/log
make[1]: Entering directory '/Work/Genode/genode-18.02/build/dragonboard'
checking library dependencies...
[00;33m Library [0msyscall-hw
COMPILE kernel/interface.o
MERGE syscall-hw.lib.a
[00;33m Library [0mbase-hw-common
COMPILE allocator_avl.o
COMPILE avl_tree.o
COMPILE child.o
COMPILE child_process.o
COMPILE component.o
COMPILE console.o
COMPILE elf_binary.o
COMPILE entrypoint.o
COMPILE env_session_id_space.o
COMPILE heap.o
COMPILE ipc.o
COMPILE lock.o
COMPILE log.o
COMPILE output.o
COMPILE raw_output.o
COMPILE region_map_client.o
COMPILE registry.o
COMPILE rm_session_client.o
COMPILE root_proxy.o
COMPILE rpc_dispatch_loop.o
COMPILE rpc_entrypoint.o
COMPILE session_state.o
COMPILE signal_common.o
COMPILE signal_transmitter.o
COMPILE slab.o
COMPILE sleep.o
COMPILE sliced_heap.o
COMPILE stack_allocator.o
COMPILE thread.o
COMPILE thread_bootstrap.o
COMPILE thread_myself.o
COMPILE trace.o
MERGE base-hw-common.lib.a
[00;33m Library [0mcxx
COMPILE exception.o
COMPILE guard.o
COMPILE malloc_free.o
COMPILE misc.o
COMPILE new_delete.o
MERGE supc++.o
CONVERT supc++.o
COMPILE unwind.o
MERGE cxx.lib.a
[00;33m Library [0mcore-hw
COMPILE _main.o
COMPILE capability.o
COMPILE core_log.o
COMPILE core_log_out.o
COMPILE core_mem_alloc.o
COMPILE core_region_map.o
COMPILE core_rpc_cap_alloc.o
COMPILE cpu_session_component.o
COMPILE cpu_session_support.o
COMPILE cpu_thread_component.o
COMPILE dataspace_component.o
COMPILE default_log.o
COMPILE dump_alloc.o
COMPILE env.o
COMPILE init_main_thread.o
COMPILE io_mem_session_component.o
COMPILE io_mem_session_support.o
COMPILE irq_session_component.o
COMPILE kernel/cpu.o
COMPILE kernel/cpu_scheduler.o
COMPILE kernel/double_list.o
COMPILE kernel/init.o
COMPILE kernel/ipc_node.o
COMPILE kernel/irq.o
COMPILE kernel/object.o
COMPILE kernel/signal_receiver.o
COMPILE kernel/thread.o
COMPILE kernel/timer.o
COMPILE kernel_log.o
COMPILE main.o
COMPILE native_pd_component.o
COMPILE native_utcb.o
COMPILE pager.o
COMPILE pd_session_component.o
COMPILE pd_session_support.o
COMPILE platform.o
COMPILE platform_pd.o
COMPILE platform_rom_modules.o
COMPILE platform_thread.o
COMPILE ram_dataspace_factory.o
COMPILE ram_dataspace_support.o
COMPILE region_map_component.o
COMPILE region_map_support.o
COMPILE rom_session_component.o
COMPILE signal_receiver.o
COMPILE signal_transmitter_noinit.o
COMPILE spec/64bit/memory_map.o
COMPILE spec/arm64/cpu.o
ASSEMBLE spec/arm64/crt0.o
ASSEMBLE spec/arm64/exception_vector.o
COMPILE spec/arm64/kernel/thread.o
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/kernel/thread.cc:[m[K In member function â[01m[Kvirtual void Kernel::Thread::exception(Kernel::Cpu&)[m[Kâ:
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/kernel/thread.cc:25:14:[m[K [01;35m[Kwarning: [m[Kvariable â[01m[Ke_origin[m[Kâ set but not used [[01;35m[K-Wunused-but-set-variable[m[K]
int e_type, [01;35m[Ke_origin[m[K;
[01;35m[K^~~~~~~~[m[K
In file included from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/cortex_a53/cpu.h:20:0[m[K,
from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/kernel/thread.h:18[m[K,
from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/kernel/cpu.h:21[m[K,
from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/kernel/thread.cc:15[m[K:
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/fpu.h:[m[K In static member function â[01m[Kstatic Genode::Register<32ul>::access_t Genode::Fpu::Fpexc::read()[m[Kâ:
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/fpu.h:72:12:[m[K [01;35m[Kwarning: [m[Kâ[01m[Kv[m[Kâ is used uninitialized in this function [[01;35m[K-Wuninitialized[m[K]
return [01;35m[Kv[m[K;
[01;35m[K^[m[K
COMPILE spec/arm64/platform_support.o
COMPILE spec/arm64/smp/kernel/cpu.o
COMPILE spec/arm64/smp/kernel/thread_update_pd.o
COMPILE spec/arm_gic/pic.o
COMPILE spec/arm_v8/cpu.o
COMPILE spec/arm_v8/perf_counter.o
COMPILE spec/cortex_a53/fpu.o
In file included from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/cortex_a53/cpu.h:20:0[m[K,
from [01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/cortex_a53/fpu.cc:16[m[K:
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/fpu.h:[m[K In static member function â[01m[Kstatic Genode::Register<32ul>::access_t Genode::Fpu::Fpexc::read()[m[Kâ:
[01m[K/Work/Genode/genode-18.02/repos/base/../base-hw/src/core/spec/arm64/fpu.h:72:12:[m[K [01;35m[Kwarning: [m[Kâ[01m[Kv[m[Kâ is used uninitialized in this function [[01;35m[K-Wuninitialized[m[K]
return [01;35m[Kv[m[K;
[01;35m[K^[m[K
COMPILE spec/cortex_a53/kernel/cpu.o
COMPILE spec/cortex_a53/timer.o
COMPILE spec/dragonboard/platform_services.o
COMPILE spec/dragonboard/platform_support.o
COMPILE spec/smp/kernel/cpu.o
COMPILE spec/smp/kernel/kernel.o
COMPILE stack_area.o
COMPILE stack_area_addr.o
COMPILE thread_start.o
COMPILE trace_session_component.o
COMPILE version.o
MERGE core-hw.lib.a
[01;33m Program [0mcore/hw/core
[00;33m Library [0mldso-startup
COMPILE startup.o
COMPILE unwind_exidx.o
MERGE ldso-startup.lib.a
[00;33m Library [0mld
CONVERT ld.symbols.s
ASSEMBLE ld.symbols.o
MERGE ld.abi.so
[00;33m Library [0mbase
MERGE base.lib.a
[01;33m Program [0minit/init
COMPILE child.o
COMPILE main.o
COMPILE server.o
LINK init
[01;33m Program [0mtest/log/test-log
COMPILE main.o
LINK test-log
make[1]: Leaving directory '/Work/Genode/genode-18.02/build/dragonboard'
genode build completed
checking configuration syntax
CHECK init
building targets: bootstrap/hw core/hw lib/ld/hw
spawn make bootstrap/hw core/hw lib/ld/hw
make[1]: Entering directory '/Work/Genode/genode-18.02/build/dragonboard'
checking library dependencies...
[00;33m Library [0mcxx
[00;33m Library [0mbootstrap-hw
COMPILE bootstrap/env.o
COMPILE bootstrap/init.o
COMPILE bootstrap/lock.o
COMPILE bootstrap/log.o
COMPILE bootstrap/platform.o
COMPILE bootstrap/spec/arm64/cortex_a53_mmu.o
COMPILE bootstrap/spec/arm64/cpu.o
ASSEMBLE bootstrap/spec/arm64/crt0.o
COMPILE bootstrap/spec/arm64/pic.o
COMPILE bootstrap/spec/dragonboard/platform.o
COMPILE bootstrap/thread.o
COMPILE hw/capability.o
COMPILE hw/spec/64bit/memory_map.o
COMPILE hw/spec/arm64/arm_v8_cpu.o
COMPILE lib/base/allocator_avl.o
COMPILE lib/base/avl_tree.o
COMPILE lib/base/console.o
COMPILE lib/base/elf_binary.o
COMPILE lib/base/heap.o
COMPILE lib/base/log.o
COMPILE lib/base/output.o
COMPILE lib/base/registry.o
COMPILE lib/base/slab.o
COMPILE lib/base/sleep.o
COMPILE lib/base/sliced_heap.o
COMPILE lib/startup/_main.o
MERGE bootstrap-hw.lib.a
[01;33m Program [0mbootstrap/hw/bootstrap
[00;33m Library [0msyscall-hw
[00;33m Library [0mbase-hw-common
[00;33m Library [0mcore-hw
COMPILE version.o
MERGE core-hw.lib.a
[01;33m Program [0mcore/hw/core
[00;33m Library [0malarm
COMPILE alarm.o
MERGE alarm.lib.a
[00;33m Library [0mtimed_semaphore
COMPILE timed_semaphore.o
MERGE timed_semaphore.lib.a
[00;33m Library [0mstartup-hw
COMPILE _main.o
ASSEMBLE crt0.o
COMPILE init_main_thread.o
MERGE startup-hw.lib.a
[00;33m Library [0mtimeout-hw
COMPILE duration.o
COMPILE hw/timer_connection_timestamp.o
COMPILE timeout.o
COMPILE timer_connection.o
COMPILE timer_connection_time.o
MERGE timeout-hw.lib.a
[00;33m Library [0mbase-hw
COMPILE cache.o
COMPILE capability.o
COMPILE default_log.o
COMPILE env_deprecated.o
COMPILE env_reinit.o
COMPILE log_console.o
COMPILE main_thread_cap.o
COMPILE native_utcb.o
COMPILE raw_write_string.o
COMPILE rpc_cap_alloc.o
COMPILE signal_receiver.o
COMPILE stack_area.o
COMPILE stack_area_addr.o
COMPILE thread_start.o
MERGE base-hw.lib.a
[00;33m Library [0mldso-startup
[00;33m Library [0mld-hw
COMPILE debug.o
COMPILE dependency.o
COMPILE exception.o
ASSEMBLE jmp_slot.o
COMPILE main.o
COMPILE shared_object.o
COMPILE test.o
CONVERT symbol.map
MERGE ld-hw.lib.so
/NFS/usr/local/bin/linaro_6.4.1/bin/aarch64-elf-ld: /Work/Genode/genode-18.02/build/dragonboard/var/libcache/cxx/cxx.lib.a(supc++.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `_impure_ptr' can not be used when making a shared object; recompile with -fPIC
/NFS/usr/local/bin/linaro_6.4.1/bin/aarch64-elf-ld: /Work/Genode/genode-18.02/build/dragonboard/var/libcache/cxx/cxx.lib.a(supc++.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `_impure_ptr' can not be used when making a shared object; recompile with -fPIC
/NFS/usr/local/bin/linaro_6.4.1/bin/aarch64-elf-ld: /Work/Genode/genode-18.02/build/dragonboard/var/libcache/cxx/cxx.lib.a(supc++.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `_impure_ptr' can not be used when making a shared object; recompile with -fPIC
CONVERT ld-hw.symbols.s
ASSEMBLE ld-hw.symbols.o
MERGE ld-hw.abi.so
[01;33m Program [0mlib/ld/hw/ld-hw
make[1]: Leaving directory '/Work/Genode/genode-18.02/build/dragonboard'
genode build completed
using 'ld-hw.lib.so' as 'ld.lib.so'
core link address is 0x85000000
debug/core-hw.o: In function `__gnu_cxx::__verbose_terminate_handler()':
/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:67: undefined reference to `_impure_ptr'
/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:67: undefined reference to `_impure_ptr'
/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:69: undefined reference to `_impure_ptr'
/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:72: undefined reference to `_impure_ptr'
/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:49: undefined reference to `_impure_ptr'
debug/core-hw.o:/home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/aarch64-elf/snapshots/gcc.git~linaro-6.4-2018.05/libstdc++-v3/libsupc++/vterminate.cc:49: more undefined references to `_impure_ptr' follow
collect2: error: ld returned 1 exit status
while executing
"exec [cross_dev_prefix]g++ {*}$arch -nostdlib {*}[core_ld_opts] -Wl,-z -Wl,max-page-size=0x1000 -Wl,-Ttext=$link_address -Wl,-gc-sections -Wl,-nost..."
(procedure "build_core" line 18)
invoked from within
"build_core debug/$core_obj {} [run_dir].core [core_link_address]"
(procedure "run_boot_dir" line 43)
invoked from within
"run_boot_dir $binaries"
(procedure "build_boot_image" line 27)
invoked from within
"build_boot_image "core ld.lib.so init test-log""
(file "/Work/Genode/genode-18.02/repos/base/run/log.run" line 23)
invoked from within
"source $include_name"
("foreach" body line 6)
invoked from within
"foreach include_name [get_cmd_arg --include ""] {
# first check if the include name is absolute
if {[string first "/" $include_name] == 0} {
puts ..."
(file "/Work/Genode/genode-18.02/tool/run/run" line 959)
make: *** [run/log] Error 1
Makefile:312: recipe for target 'run/log' failed
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