diff mbox series

[RFC,41/47] Revert "kbuild: remove CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX"

Message ID f979f24b032151ac63a5ba6f70172e32ed571448.1571798507.git.thehajime@gmail.com
State Superseded
Headers show
Series [RFC,01/47] asm-generic: atomic64: allow using generic atomic64 on 64bit platforms | expand

Commit Message

Hajime Tazaki Oct. 23, 2019, 4:38 a.m. UTC 
This reverts commit 704db5433fb43acbf1486303721bd0cbb65af251.

for lkl, mingw32 requires underscore-ed symbols.

Signed-off-by: Hajime Tazaki <thehajime@gmail.com>
---
 arch/Kconfig                | 6 ++++++
 scripts/Makefile.build      | 7 ++++++-
 scripts/adjust_autoksyms.sh | 7 ++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/Kconfig b/arch/Kconfig
index a7b57dd42c26..a01df2ae6a1b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -594,6 +594,12 @@  config MODULES_USE_ELF_REL
 	  Modules only use ELF REL relocations.  Modules with ELF RELA
 	  relocations will give an error.
 
+config HAVE_UNDERSCORE_SYMBOL_PREFIX
+	bool
+	help
+	  Some architectures generate an _ in front of C symbols; things like
+	  module loading and assembly files need to know about this.
+
 config HAVE_IRQ_EXIT_ON_IRQ_STACK
 	bool
 	help
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 2f66ed388d1c..c6fe3e092ae0 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -444,10 +444,15 @@  targets += $(lib-target)
 
 dummy-object = $(obj)/.lib_exports.o
 ksyms-lds = $(dot-target).lds
+ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
+ref_prefix = EXTERN(_
+else
+ref_prefix = EXTERN(
+endif
 
 quiet_cmd_export_list = EXPORTS $@
 cmd_export_list = $(OBJDUMP) -h $< | \
-	sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\
+	sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\
 	rm -f $(dummy-object);\
 	echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
 	$(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index a904bf1f5e67..10e49e00a1f6 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -49,7 +49,12 @@  EOT
 sed 's/ko$/mod/' modules.order |
 xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
 sort -u |
-sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file"
+while read sym; do
+	if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
+		sym="${sym#_}"
+	fi
+	echo "#define __KSYM_${sym} 1"
+done >> "$new_ksyms_file"
 
 # Special case for modversions (see modpost.c)
 if [ -n "$CONFIG_MODVERSIONS" ]; then