[llvm-bugs] [Bug 45217] New: unknown argument '--change-section-address'

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Mon Mar 16 13:31:45 PDT 2020


            Bug ID: 45217
           Summary: unknown argument '--change-section-address'
           Product: tools
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-objcopy/strip
          Assignee: unassignedbugs at nondot.org
          Reporter: ndesaulniers at google.com
                CC: alexander.v.shaposhnikov at gmail.com,
                    jake.h.ehrlich at gmail.com,
                    jh7370.2008 at my.bristol.ac.uk,
                    llvm-bugs at lists.llvm.org, rupprecht at google.com
            Blocks: 4068

The Linux kernel has a custom debug format for eBPF (IIUC) called BTF.  It
looks like it's making use of GNU objcopy's `--change-section-address` to set
the section address to `0`:


It doesn't look like there's any non-default linker script being used, so I'm
not sure we could avoid this with a linker script.

Referenced Bugs:

[Bug 4068] [Meta] Compiling the Linux kernel with clang
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