[llvm-bugs] [Bug 45217] New: unknown argument '--change-section-address'
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Mar 16 13:31:45 PDT 2020
https://bugs.llvm.org/show_bug.cgi?id=45217
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`:
https://github.com/ClangBuiltLinux/linux/commit/df786c9b947639aedbc7bb44b5dae2a7824af360
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:
https://bugs.llvm.org/show_bug.cgi?id=4068
[Bug 4068] [Meta] Compiling the Linux kernel with clang
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