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a951884d82
lld is now able to build ARMv4 and ARMv4T kernels, which means it can generate thunks for those (__ARMv4PILongThunk_*, __ARMv4PILongBXThunk_*) that can interfere with kallsyms table generation since they do not get ignore like the corresponding ARMv5+ ones are: Inconsistent kallsyms data Try "make KALLSYMS_EXTRA_PASS=1" as a workaround Replace the hardcoded list of thunk symbols with a more general regex that covers this one along with future symbols that follow the same pattern. Fixes:5eb6e28043("ARM: 9289/1: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer") Fixes:efe6e30680("kallsyms: fix nonconverging kallsyms table with lld") Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
104 lines
2.6 KiB
Bash
Executable file
104 lines
2.6 KiB
Bash
Executable file
#!/bin/sh -x
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# Based on the vmlinux file create the System.map file
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# System.map is used by module-init tools and some debugging
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# tools to retrieve the actual addresses of symbols in the kernel.
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#
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# Usage
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# mksysmap vmlinux System.map [exclude]
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#####
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# Generate System.map (actual filename passed as second argument)
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# The following refers to the symbol type as per nm(1).
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# readprofile starts reading symbols when _stext is found, and
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# continue until it finds a symbol which is not either of 'T', 't',
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# 'W' or 'w'.
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#
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${NM} -n ${1} | sed >${2} -e "
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# ---------------------------------------------------------------------------
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# Ignored symbol types
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#
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# a: local absolute symbols
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# N: debugging symbols
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# U: undefined global symbols
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# w: local weak symbols
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/ [aNUw] /d
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# ---------------------------------------------------------------------------
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# Ignored prefixes
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# (do not forget a space before each pattern)
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# local symbols for ARM, MIPS, etc.
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/ \\$/d
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# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
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/ \.L/d
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# arm64 EFI stub namespace
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/ __efistub_/d
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# arm64 local symbols in PIE namespace
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/ __pi_\\$/d
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/ __pi_\.L/d
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# arm64 local symbols in non-VHE KVM namespace
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/ __kvm_nvhe_\\$/d
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/ __kvm_nvhe_\.L/d
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# lld arm/aarch64/mips thunks
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/ __[[:alnum:]]*Thunk_/d
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# CFI type identifiers
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/ __kcfi_typeid_/d
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/ __kvm_nvhe___kcfi_typeid_/d
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/ __pi___kcfi_typeid_/d
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# CRC from modversions
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/ __crc_/d
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# EXPORT_SYMBOL (symbol name)
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/ __kstrtab_/d
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# EXPORT_SYMBOL (namespace)
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/ __kstrtabns_/d
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# ---------------------------------------------------------------------------
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# Ignored suffixes
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# (do not forget '$' after each pattern)
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# arm
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/_from_arm$/d
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/_from_thumb$/d
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/_veneer$/d
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# ---------------------------------------------------------------------------
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# Ignored symbols (exact match)
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# (do not forget a space before and '$' after each pattern)
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# for LoongArch?
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/ L0$/d
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# ppc
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/ _SDA_BASE_$/d
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/ _SDA2_BASE_$/d
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# ---------------------------------------------------------------------------
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# Ignored patterns
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# (symbols that contain the pattern are ignored)
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# ppc stub
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/\.long_branch\./d
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/\.plt_branch\./d
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# ---------------------------------------------------------------------------
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# Ignored kallsyms symbols
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#
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# If the 3rd parameter exists, symbols from it will be omitted from the output.
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# This makes kallsyms have the identical symbol lists in the step 1 and 2.
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# Without this, the step2 would get new symbols generated by scripts/kallsyms.c
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# when CONFIG_KALLSYMS_ALL is enabled. That might require one more pass.
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$(if [ $# -ge 3 ]; then ${NM} ${3} | sed -n '/ U /!s:.* \([^ ]*\)$:/ \1$/d:p'; fi)
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"
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