[llvm-bugs] [Bug 30267] New: Linker script orphan sections get an invalid address on AArch64

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30267

            Bug ID: 30267
           Summary: Linker script orphan sections get an invalid address
                    on AArch64
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: andrew at fubar.geek.nz
                CC: emaste at freebsd.org, llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17211
  --> https://llvm.org/bugs/attachment.cgi?id=17211&action=edit
objdump -x of the linked kernel

While trying to link the FreeBSD arm64 kernel I received around 45141 of the
following error:
relocation R_AARCH64_ADR_PREL_PG_HI21 out of range

After commenting out the check I linked the kernel and found the orphaned
sections were placed at the end of the file and started with a virtual address
of 0. This caused an overflow in the relocation.

It would seem binutils has a heuristic to put these sections after a section
with similar attributes:
https://sourceware.org/binutils/docs/ld/Orphan-Sections.html

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