diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.vmlinux_o | 4 | ||||
| -rwxr-xr-x | scripts/check-function-names.sh | 25 |
2 files changed, 29 insertions, 0 deletions
diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o index 20533cc0b1ee..527352c222ff 100644 --- a/scripts/Makefile.vmlinux_o +++ b/scripts/Makefile.vmlinux_o @@ -63,11 +63,15 @@ quiet_cmd_ld_vmlinux.o = LD $@ --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ $(cmd_objtool) +cmd_check_function_names = $(srctree)/scripts/check-function-names.sh $@ + define rule_ld_vmlinux.o $(call cmd_and_savecmd,ld_vmlinux.o) $(call cmd,gen_objtooldep) + $(call cmd,check_function_names) endef + vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE $(call if_changed_rule,ld_vmlinux.o) diff --git a/scripts/check-function-names.sh b/scripts/check-function-names.sh new file mode 100755 index 000000000000..410042591cfc --- /dev/null +++ b/scripts/check-function-names.sh @@ -0,0 +1,25 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Certain function names are disallowed due to section name ambiguities +# introduced by -ffunction-sections. +# +# See the comment above TEXT_MAIN in include/asm-generic/vmlinux.lds.h. + +objfile="$1" + +if [ ! -f "$objfile" ]; then + echo "usage: $0 <file.o>" >&2 + exit 1 +fi + +bad_symbols=$(nm "$objfile" | awk '$2 ~ /^[TtWw]$/ {print $3}' | grep -E '^(startup|exit|split|unlikely|hot|unknown)(\.|$)') + +if [ -n "$bad_symbols" ]; then + echo "$bad_symbols" | while read -r sym; do + echo "$objfile: error: $sym() function name creates ambiguity with -ffunction-sections" >&2 + done + exit 1 +fi + +exit 0 |