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Backport an upstream patch series that adds backend elfutils support for DWARF relocations in MIPS debug info. This support is needed by pahole to generate BTF for modules in BTF-enabled kernel builds. The problem first manifests as pahole warnings during build: BTF [M] lib/libcrc32c.ko die__process_unit: DW_TAG_compile_unit (0x11) @ <0x932d> not handled! die__process_unit: tag not supported 0x11 (compile_unit)! die__process: got compile_unit unexpected tag after DW_TAG_compile_unit! die__process_unit: DW_TAG_compile_unit (0x11) @ <0x99a3> not handled! die__process_unit: tag not supported 0x11 (compile_unit)! die__process: got compile_unit unexpected tag after DW_TAG_compile_unit! During system boot the problem then causes module loading failures, which may result in many other runtime issues: [ 13.169785] kmodloader: loading kernel modules from /etc/modules.d/* [ ... ] [ 17.422840] mac80211_hwsim: initializing netlink [ 17.526518] PPP generic driver version 2.4.2 [ 17.550346] NET: Registered PF_PPPOX protocol family [ 17.795353] kmodloader: 26 modules could not be probed [ 17.796084] kmodloader: dependency not loaded nf_conntrack [ 17.796737] kmodloader: - act_connmark - 1 [ 17.797402] kmodloader: dependency not loaded nf_conntrack [ 17.798056] kmodloader: - act_ctinfo - 1 [ ... ] Link: https://lore.kernel.org/bpf/ZlkoM6%2FPSxVcGM6X@kodidev-ubuntu/ Signed-off-by: Tony Ambardar <itugrok@yahoo.com> Link: https://github.com/openwrt/openwrt/pull/15697 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> |
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