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946d462346
The check-function-names.sh scripts invokes 'nm' directly and this can
be problematic during cross-compilation when the toolchain is different
from the system's default (e.g. LLVM=1).
scripts/check-function-names.sh: nm: not found
Let's prefer the ${NM} variable which is already set by kbuild. However,
still fallback to plain 'nm' to ensure the script is still usable when
called directly.
Fixes: 93863f3f85 ("kbuild: Check for functions with ambiguous -ffunction-sections section names")
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20251218175824.3122690-1-cmllamas@google.com
Signed-off-by: Nicolas Schier <nsc@kernel.org>
26 lines
645 B
Bash
Executable File
26 lines
645 B
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Certain function names are disallowed due to section name ambiguities
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# introduced by -ffunction-sections.
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#
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# See the comment above TEXT_MAIN in include/asm-generic/vmlinux.lds.h.
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objfile="$1"
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if [ ! -f "$objfile" ]; then
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echo "usage: $0 <file.o>" >&2
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exit 1
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fi
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bad_symbols=$(${NM:-nm} "$objfile" | awk '$2 ~ /^[TtWw]$/ {print $3}' | grep -E '^(startup|exit|split|unlikely|hot|unknown)(\.|$)')
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if [ -n "$bad_symbols" ]; then
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echo "$bad_symbols" | while read -r sym; do
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echo "$objfile: error: $sym() function name creates ambiguity with -ffunction-sections" >&2
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done
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exit 1
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fi
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exit 0
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