https://bugs.llvm.org/show_bug.cgi?id=35766
Bug ID: 35766
Summary: After r320437, lld links FreeBSD kernel incorrectly
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: dimi...@andric.com
CC: llvm-bugs@lists.llvm.org
Linking the FreeBSD kernel with recent lld, I noticed complaints from ctfmerge:
ERROR: ctfmerge: kernel.full.ctf: Cannot finalize temp file: Layout constraint
violation
Running GNU objcopy on such a kernel image shows:
/usr/local/bin/objcopy: kernel.test: section .init_array lma 0x1733000 adjusted
to 0x17330f0
/usr/local/bin/objcopy: kernel.test: section .fini_array lma 0x1733000 adjusted
to 0x17330f0
/usr/local/bin/objcopy: kernel.test: section .data.rel.ro lma 0x1733000
adjusted to 0x17330f0
/usr/local/bin/objcopy: kernel.test: section .preinit_array lma 0x1733000
adjusted to 0x17330f0
I bisected and found https://reviews.llvm.org/rL320437 ("[ELF] Change default
output section type to SHT_NOBITS") to be the cause.
Maybe it is due to the linker script the FreeBSD kernel uses? I will attach or
upload the reproduction files.
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