Bug 217189
| Summary: | emulators/qemu-user-static: lld 4.0 crashes aarch64 emulator but works fine on ThunderX | ||
|---|---|---|---|
| Product: | Ports & Packages | Reporter: | Jan Beich <jbeich> |
| Component: | Individual Port(s) | Assignee: | Sean Bruno <sbruno> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | CC: | bdrewery, emaste, jonc, mikael, pi, swills, wolfgang.meyer |
| Priority: | --- | Keywords: | needs-patch |
| Version: | Latest | Flags: | bugzilla:
maintainer-feedback?
(sbruno) |
| Hardware: | arm64 | ||
| OS: | Any | ||
| Bug Depends on: | |||
| Bug Blocks: | 216008 | ||
*** Bug 217753 has been marked as a duplicate of this bug. *** Something missing is that native-xtools is not building lld as /usr/bin/ld for aarch64. I am adding that support now. Then poudriere jail -x will have a native lld for use rather than hitting the qemu bug. A commit references this bug: Author: bdrewery Date: Fri Jun 2 00:58:00 UTC 2017 New revision: 319485 URL: https://svnweb.freebsd.org/changeset/base/319485 Log: native-xtools: Connect lld. This will ensure that aarch64 gets a working native /usr/bin/ld rather than requiring the aarch64-binutils hack in Poudriere, or emulating the aarch64 lld. PR: 217189 Reported by: swills, jbeich Changes: head/Makefile.inc1 native-xtools will now install a proper native lld binary. I'll leave this bug for the qemu issue though as it is still relevant. After ports r445254 the error changed: # Tested on 11.1-RC1 $ echo 'int main() {}' >a.c $ cc a.c qemu: unhandled CPU exception 0x10005 - aborting PC=0000004002208e70 SP=0000000869705e50 X00=00000040021ec498 X01=0000000000018cb7 X02=0000000000000000 X03=0000000000000400 X04=00000000ffffffff X05=0000000000000000 X06=0000000000000000 X07=0000000000000000 X08=0000000000000000 X09=8000000000000000 X10=0000000000000002 X11=0000000000000000 X12=0000000000000004 X13=0000000000000427 X14=0000000869705b00 X15=0000004002406ff8 X16=00000040021cb250 X17=0000004002208e48 X18=0000000000000000 X19=00000040021ec498 X20=0000004002ea1c08 X21=0000000080000010 X22=0000000000000000 X23=0000000000000000 X24=0000000000000000 X25=0000000080000010 X26=0000000000000000 X27=0000000000000000 X28=0000000000000000 X29=0000000869705e60 X30=000000400217a754 PSTATE=80000000 N--- EL0t cc: error: unable to execute command: Abort trap cc: error: linker command failed due to signal (use -v to see invocation) Can you try with these 2 patches (I don't think the first one is needed): https://github.com/MikaelUrankar/qemu-bsd-user/commit/91395f1afc5c4faa81515aad695809f95ec90d93 https://github.com/MikaelUrankar/qemu-bsd-user/commit/a66e817fc3016f8e05dc596ab59020034c1446da (In reply to mikael.urankar from comment #6) ## aarch64 after $ cc a.c ## armv6 # before $ cc -fuse-ld=lld a.c /usr/bin/ld.lld: error: failed to open a.out: Unknown error -1 $ after $ cc -fuse-ld=lld a.c /usr/bin/ld.lld: error: failed to open a.out: Invalid argument cc: error: linker command failed with exit code 1 (use -v to see invocation) So, lld works fine on aarch64 where it's default linker but not on armv6 where bfd is still default. (In reply to commit-hook from comment #3) > A commit references this bug: > > Author: bdrewery > Date: Fri Jun 2 00:58:00 UTC 2017 > New revision: 319485 > URL: https://svnweb.freebsd.org/changeset/base/319485 > > Log: > native-xtools: Connect lld. > > This will ensure that aarch64 gets a working native /usr/bin/ld rather > than requiring the aarch64-binutils hack in Poudriere, or emulating > the aarch64 lld. > > PR: 217189 > Reported by: swills, jbeich > > Changes: > head/Makefile.inc1 After this fix, the tcg error goes away for me cross-building arm64 with QEMU with native-xtools (poudriere jail -x) since QEMU is avoided. With using /usr/bin/ld (arm64 binary) via QEMU it still hits the error. (In reply to Jan Beich from comment #7) The armv6 problem should be solved with: https://github.com/MikaelUrankar/qemu-bsd-user/commit/845d047b974f4687044f2237f0d009578c814cf2 (In reply to mikael.urankar from comment #9) I confirm, with all 3 patches applied both aarch64 and armv6 are able to build using lld. (In reply to Jan Beich from comment #10) I'll add these patches to the next release of qemu-user-static. Doing build tests and runtime tests now. |
Soon /head is going to upgrade lld to 4.0 which no longer works, so poudriere is blocked by ports-mgmt/pkg failing to build. Downgrading to lld to 3.9 or using GNU binutils appears to help. I can reproduce on 11.0 aarch64 + lld 4.0 on qemu-user-static but not on ref12-aarch64. # projects/clang400-import branch $ echo 'int main() {}' >a.c $ cc a.c /usr/ports/emulators/qemu-user-static/work/qemu-bsd-user-506a08c/tcg/tcg.c:2017: tcg fatal error cc: error: unable to execute command: Abort trap cc: error: linker command failed due to signal (use -v to see invocation) # On earlier releases $ pkg install llvm40 $ clang40 -fuse-ld=lld a.c /usr/ports/emulators/qemu-user-static/work/qemu-bsd-user-506a08c/tcg/tcg.c:2017: tcg fatal error clang-4.0: error: unable to execute command: Abort trap