[llvm-bugs] [Bug 42853] New: LLD chokes on R_AARCH64_TLSLE_MOVW_TPREL_G0

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42853

            Bug ID: 42853
           Summary: LLD chokes on R_AARCH64_TLSLE_MOVW_TPREL_G0
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: jkz at google.com
                CC: llvm-bugs at lists.llvm.org, peter.smith at linaro.org

Created attachment 22327
  --> https://bugs.llvm.org/attachment.cgi?id=22327&action=edit
Contains exp.s and var.c, the files needed to reproduce the issue.

LLD is unable to link objects containing `R_AARCH64_TLSLE_MOVW_TPREL_G0`
relocations. It fails with the error:

ld.lld: error: exp.o:(.text+0x0): unrecognized relocation
R_AARCH64_TLSLE_MOVW_TPREL_G0

This is still failing at HEAD (tested at r367451). It looks like the failure
was introduced at r358950, lld built at r358949 can successfully link. A small
reproducer is attached, the issue can be reproduced like so:

$ clang --target=aarch64-pc-linux-gnu -c exp.s
$ clang --target=aarch64-pc-linux-gnu -c var.c
$ ld.lld -o/dev/null exp.o var.o

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