This looks exactly like the bug in https://github.com/golang/go/issues/38728. The prolog of the function contains
0: f3 0f 1e fa endbr64 which is confusing the gold linker. This instruction doesn't get added unless the host compiler has "-fcf-protection=branch" turned on. I would suggest deleting and recreating your build area or removing your CMakeCache.txt file to insure that you have a rebuild from a clean start. Thanks, Than On Tue, May 26, 2020 at 11:00 AM Yuan Ting <yuant...@ict.ac.cn> wrote: > OK, as follows > > ./tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o: > file format elf64-x86-64 > > > Disassembly of section .text.syscall.GetErrno: > > 0000000000000000 <syscall.GetErrno>: > 0: f3 0f 1e fa endbr64 > 4: 64 48 3b 24 25 70 00 cmp %fs:0x70,%rsp > b: 00 00 > d: 72 11 jb 20 <syscall.GetErrno+0x20> > f: 48 83 ec 08 sub $0x8,%rsp > 13: e8 00 00 00 00 callq 18 <syscall.GetErrno+0x18> > 14: R_X86_64_PLT32 __errno_location-0x4 > 18: 48 63 00 movslq (%rax),%rax > 1b: 48 83 c4 08 add $0x8,%rsp > 1f: c3 retq > 20: 41 ba 08 00 00 00 mov $0x8,%r10d > 26: 45 31 db xor %r11d,%r11d > 29: e8 00 00 00 00 callq 2e <syscall.GetErrno+0x2e> > 2a: R_X86_64_PLT32 __morestack-0x4 > 2e: c3 retq > 2f: f3 0f 1e fa endbr64 > 33: eb da jmp f <syscall.GetErrno+0xf> > > On Tuesday, May 26, 2020 at 10:44:03 PM UTC+8, Than McIntosh wrote: >> >> OK. Just to confirm, what do you see from >> >> objdump -dr >> ./tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o >> >> for the prolog of syscall.Geterrno. Should be something like >> >> Disassembly of section .text.syscall.GetErrno: >> >> 0000000000000000 <syscall.GetErrno>: >> 0: 64 48 3b 24 25 70 00 cmp %fs:0x70,%rsp >> 7: 00 00 >> 9: 72 11 jb 1c <syscall.GetErrno+0x1c> >> b: 48 83 ec 08 sub $0x8,%rsp >> f: e8 00 00 00 00 callq 14 <syscall.GetErrno+0x14> >> 10: R_X86_64_PLT32 __errno_location-0x4 >> >> Thanks, Than >> >> ? >> >> On Tue, May 26, 2020 at 10:05 AM Yuan Ting <yuan...@ict.ac.cn> wrote: >> >>> Fine, that is >>> >>> [1/3] /usr/bin/cc -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS >>> -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Itools/gollvm/libgo >>> -I/root/llvm-project/llvm/tools/gollvm/libgo -Iinclude >>> -I/root/llvm-project/llvm/include >>> -I/root/llvm-project/llvm/tools/gollvm/gofrontend/libgo/runtime >>> -Itools/gollvm/libgo/runtime >>> -I/root/llvm-project/llvm/tools/gollvm/libgo/libbacktrace -fPIC >>> -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings >>> -Wno-missing-field-initializers -pedantic -Wno-long-long >>> -Wimplicit-fallthrough -Wno-comment -fdiagnostics-color -ffunction-sections >>> -fdata-sections -O3 -fPIC -g -Wno-zero-length-array -fsplit-stack >>> -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -UNDEBUG -MD -MT >>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o >>> -MF >>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o.d >>> -o >>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o >>> -c /root/llvm-project/llvm/tools/gollvm/gofrontend/libgo/go/syscall/errno.c >>> >>> On Tuesday, May 26, 2020 at 8:41:18 PM UTC+8, Than McIntosh wrote: >>>> >>>> OK. >>>> >>>> I'm wondering if for some reason the fix I put in is not effective. >>>> >>>> Could you please try this in your build area: >>>> >>>> rm >>>> ./tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o >>>> ninja -v libgo_all >>>> >>>> and post the compile line for errno.c? >>>> >>>> Thanks, Than >>>> >>>> >>>> >>>> >>>> On Tue, May 26, 2020 at 7:21 AM Yuan Ting <yuan...@ict.ac.cn> wrote: >>>> >>>>> Yes, I'm sure I fetched the last version of gollvm, >>>>> i.e. 0edc44a02852dd0d56cac35163a45634b497d6cd >>>>> >>>>> On Tuesday, May 26, 2020 at 6:55:08 PM UTC+8, Than McIntosh wrote: >>>>>> >>>>>> Hello, >>>>>> >>>>>> The ld.gold error message looks a lot like one reported in a previous >>>>>> bug, https://github.com/golang/go/issues/38728. >>>>>> >>>>>> Can you please check to make sure that your client is sync'd past the >>>>>> CLs that fix this issue, e.g. 0edc44a02852dd0d56cac35163a45634b497d6cd. >>>>>> >>>>>> Thanks, Than >>>>>> >>>>>> >>>>>> On Mon, May 25, 2020 at 10:15 PM Yuan Ting <yuan...@ict.ac.cn> wrote: >>>>>> >>>>>>> I tried to build gollvm in a docker container (the image is based on >>>>>>> ubuntu 20.04, and the host OS is MacOS catalina). I configured llvm by >>>>>>> >>>>>>> SHELL=/bin/sh cmake -DCMAKE_BUILD_TYPE=Release >>>>>>> -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ENABLE_ASSERTIONS=On >>>>>>> -DLLVM_ENABLE_RTTI=On -DLLVM_USE_LINKER=gold -G Ninja ../llvm >>>>>>> >>>>>>> and then build and install gollvm by >>>>>>> >>>>>>> ninja gollvm && ninja install-gollvm >>>>>>> >>>>>>> after a while, I encountered >>>>>>> >>>>>>> ... >>>>>>> >>>>>>> error: At most two relocations per offset are supported >>>>>>> >>>>>>> error: At most two relocations per offset are supported >>>>>>> >>>>>>> error: At most two relocations per offset are supported >>>>>>> >>>>>>> [212/1279] Creating >>>>>>> /root/llvm-project/build-debug/tools/gollvm/libgo/tmp-sigtab.go >>>>>>> >>>>>>> FAILED: tools/gollvm/libgo/tmp-sigtab.go >>>>>>> >>>>>>> cd /root/llvm-project/build-debug/tools/gollvm/libgo && GOARCH=amd64 >>>>>>> GOOS=linux /bin/sh >>>>>>> /root/llvm-project/llvm/tools/gollvm/libgo/capturescript.sh >>>>>>> /root/llvm-project/llvm/tools/gollvm/gofrontend/libgo/mksigtab.sh >>>>>>> /root/llvm-project/build-debug/tools/gollvm/libgo/tmp-sigtab.go >>>>>>> >>>>>>> error: no SHELL setting >>>>>>> >>>>>>> [214/1279] Creating >>>>>>> /root/llvm-project/build-debug/tools/gollvm/libgo/tmp-sysinfo.go >>>>>>> >>>>>>> ninja: build stopped: subcommand failed. >>>>>>> >>>>>>> >>>>>>> By add SHELL=/bin/sh, the errors above seems to be skipped but >>>>>>> another period of time: >>>>>>> >>>>>>> >>>>>>> ... >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o: >>>>>>> failed to match split-stack sequence at section 4 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/errno.c.o: >>>>>>> failed to match split-stack sequence at section 6 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libgo_c_piclib.dir/__/gofrontend/libgo/go/syscall/signame.c.o: >>>>>>> failed to match split-stack sequence at section 5 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libbacktrace_piclib.dir/libbacktrace/backtrace.c.o: >>>>>>> failed to match split-stack sequence at section 4 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libbacktrace_piclib.dir/libbacktrace/backtrace.c.o: >>>>>>> failed to match split-stack sequence at section 6 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libbacktrace_piclib.dir/libbacktrace/dwarf.c.o: >>>>>>> failed to match split-stack sequence at section 18 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libbacktrace_piclib.dir/libbacktrace/dwarf.c.o: >>>>>>> failed to match split-stack sequence at section 79 offset 0 >>>>>>> >>>>>>> ... >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libffi_piclib.dir/libffi/src/x86/ffi64.c.o: >>>>>>> failed to match split-stack sequence at section 22 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libffi_piclib.dir/libffi/src/x86/ffi64.c.o: >>>>>>> failed to match split-stack sequence at section 26 offset 0 >>>>>>> >>>>>>> /usr/bin/ld.gold: error: >>>>>>> tools/gollvm/libgo/CMakeFiles/libffi_piclib.dir/libffi/src/x86/ffiw64.c.o: >>>>>>> failed to match split-stack sequence at section 16 offset 0 >>>>>>> >>>>>>> collect2: error: ld returned 1 exit status >>>>>>> >>>>>>> [901/1066] Linking C static library tools/gollvm/libgo/libgo.a >>>>>>> >>>>>>> ninja: build stopped: subcommand failed. >>>>>>> >>>>>>> >>>>>>> I'm not sure the error is caused by the container environment or my >>>>>>> configurations/other prerequisites. >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "golang-nuts" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to golan...@googlegroups.com. >>>>>>> To view this discussion on the web visit >>>>>>> https://groups.google.com/d/msgid/golang-nuts/23309451-cb0a-4f7b-93a1-27038187302a%40googlegroups.com >>>>>>> <https://groups.google.com/d/msgid/golang-nuts/23309451-cb0a-4f7b-93a1-27038187302a%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>> . >>>>>>> >>>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "golang-nuts" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to golan...@googlegroups.com. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/golang-nuts/1ffd3fb4-e739-4f13-9168-565e4c64bc70%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/golang-nuts/1ffd3fb4-e739-4f13-9168-565e4c64bc70%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "golang-nuts" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to golan...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/2e9d2af9-7d78-443b-9cda-34d7b9c41623%40googlegroups.com >>> <https://groups.google.com/d/msgid/golang-nuts/2e9d2af9-7d78-443b-9cda-34d7b9c41623%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/975b8157-5795-4c09-9aed-91278aa5f0e6%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/975b8157-5795-4c09-9aed-91278aa5f0e6%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. 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