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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-20 18:36:47 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-20 18:36:47 +0300
commitd7b0827f28ab3a4fd65864451ffefa695e3255fd (patch)
treeed93beb88fa420cf276b2c3fc22c02c022dde693 /scripts/link-vmlinux.sh
parent574cc4539762561d96b456dbc0544d8898bd4c6e (diff)
parent77564a4829ef6d309331d443ea6ceb065f3dc371 (diff)
downloadlinux-d7b0827f28ab3a4fd65864451ffefa695e3255fd.tar.xz
Merge tag 'kbuild-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada: - add modpost warn exported symbols marked as 'static' because 'static' and EXPORT_SYMBOL is an odd combination - break the build early if gold linker is used - optimize the Bison rule to produce .c and .h files by a single pattern rule - handle PREEMPT_RT in the module vermagic and UTS_VERSION - warn CONFIG options leaked to the user-space except existing ones - make single targets work properly - rebuild modules when module linker scripts are updated - split the module final link stage into scripts/Makefile.modfinal - fix the missed error code in merge_config.sh - improve the error message displayed on the attempt of the O= build in unclean source tree - remove 'clean-dirs' syntax - disable -Wimplicit-fallthrough warning for Clang - add CONFIG_CC_OPTIMIZE_FOR_SIZE_O3 for ARC - remove ARCH_{CPP,A,C}FLAGS variables - add $(BASH) to run bash scripts - change *CFLAGS_<basetarget>.o to take the relative path to $(obj) instead of the basename - stop suppressing Clang's -Wunused-function warnings when W=1 - fix linux/export.h to avoid genksyms calculating CRC of trimmed exported symbols - misc cleanups * tag 'kbuild-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (63 commits) genksyms: convert to SPDX License Identifier for lex.l and parse.y modpost: use __section in the output to *.mod.c modpost: use MODULE_INFO() for __module_depends export.h, genksyms: do not make genksyms calculate CRC of trimmed symbols export.h: remove defined(__KERNEL__), which is no longer needed kbuild: allow Clang to find unused static inline functions for W=1 build kbuild: rename KBUILD_ENABLE_EXTRA_GCC_CHECKS to KBUILD_EXTRA_WARN kbuild: refactor scripts/Makefile.extrawarn merge_config.sh: ignore unwanted grep errors kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj) modpost: add NOFAIL to strndup modpost: add guid_t type definition kbuild: add $(BASH) to run scripts with bash-extension kbuild: remove ARCH_{CPP,A,C}FLAGS kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC kbuild: Do not enable -Wimplicit-fallthrough for clang for now kbuild: clean up subdir-ymn calculation in Makefile.clean kbuild: remove unneeded '+' marker from cmd_clean kbuild: remove clean-dirs syntax kbuild: check clean srctree even earlier ...
Diffstat (limited to 'scripts/link-vmlinux.sh')
-rwxr-xr-xscripts/link-vmlinux.sh40
1 files changed, 21 insertions, 19 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 8c59970a09dc..06495379fcd8 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -64,6 +64,8 @@ vmlinux_link()
local output=${1}
local objects
+ info LD ${output}
+
# skip output file argument
shift
@@ -157,6 +159,18 @@ kallsyms()
${CC} ${aflags} -c -o ${2} ${afile}
}
+# Perform one step in kallsyms generation, including temporary linking of
+# vmlinux.
+kallsyms_step()
+{
+ kallsymso_prev=${kallsymso}
+ kallsymso=.tmp_kallsyms${1}.o
+ kallsyms_vmlinux=.tmp_vmlinux${1}
+
+ vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o}
+ kallsyms ${kallsyms_vmlinux} ${kallsymso}
+}
+
# Create map file with all symbols from ${1}
# See mksymap for additional details
mksysmap()
@@ -243,6 +257,7 @@ if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
fi
kallsymso=""
+kallsymso_prev=""
kallsyms_vmlinux=""
if [ -n "${CONFIG_KALLSYMS}" ]; then
@@ -269,32 +284,19 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
# a) Verify that the System.map from vmlinux matches the map from
# ${kallsymso}.
- kallsymso=.tmp_kallsyms2.o
- kallsyms_vmlinux=.tmp_vmlinux2
-
- # step 1
- vmlinux_link .tmp_vmlinux1 ${btf_vmlinux_bin_o}
- kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
-
- # step 2
- vmlinux_link .tmp_vmlinux2 .tmp_kallsyms1.o ${btf_vmlinux_bin_o}
- kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
+ kallsyms_step 1
+ kallsyms_step 2
# step 3
- size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms1.o)
- size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms2.o)
+ size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso_prev})
+ size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
- kallsymso=.tmp_kallsyms3.o
- kallsyms_vmlinux=.tmp_vmlinux3
-
- vmlinux_link .tmp_vmlinux3 .tmp_kallsyms2.o ${btf_vmlinux_bin_o}
- kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
+ kallsyms_step 3
fi
fi
-info LD vmlinux
-vmlinux_link vmlinux "${kallsymso}" "${btf_vmlinux_bin_o}"
+vmlinux_link vmlinux "${kallsymso}" ${btf_vmlinux_bin_o}
if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
info SORTEX vmlinux