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-rw-r--r--Documentation/kbuild/kbuild.txt8
-rw-r--r--Makefile8
-rwxr-xr-xscripts/link-vmlinux.sh45
3 files changed, 46 insertions, 15 deletions
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 0ff6a466a05b..ac2363ea05c5 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -236,5 +236,9 @@ Files specified with KBUILD_VMLINUX_INIT are linked first.
KBUILD_VMLINUX_MAIN
--------------------------------------------------
All object files for the main part of vmlinux.
-KBUILD_VMLINUX_INIT and KBUILD_VMLINUX_MAIN together specify
-all the object files used to link vmlinux.
+
+KBUILD_VMLINUX_LIBS
+--------------------------------------------------
+All .a "lib" files for vmlinux.
+KBUILD_VMLINUX_INIT, KBUILD_VMLINUX_MAIN, and KBUILD_VMLINUX_LIBS together
+specify all the object files used to link vmlinux.
diff --git a/Makefile b/Makefile
index 853ae9179af9..1177775fa410 100644
--- a/Makefile
+++ b/Makefile
@@ -952,19 +952,19 @@ core-y := $(patsubst %/, %/built-in.o, $(core-y))
drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
net-y := $(patsubst %/, %/built-in.o, $(net-y))
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
-libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
-libs-y := $(libs-y1) $(libs-y2)
+libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
# Externally visible symbols (used by link-vmlinux.sh)
export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
-export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
+export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
+export KBUILD_VMLINUX_LIBS := $(libs-y1)
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
export LDFLAGS_vmlinux
# used by scripts/pacmage/Makefile
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
-vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
+vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
# Include targets which we want to execute sequentially if the rest of the
# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 72a0aa627c56..e7b7eee31538 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -3,9 +3,12 @@
# link vmlinux
#
# vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_INIT) and
-# $(KBUILD_VMLINUX_MAIN). Most are built-in.o files from top-level directories
-# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
-# Ordering when linking is important, and $(KBUILD_VMLINUX_INIT) must be first.
+# $(KBUILD_VMLINUX_MAIN) and $(KBUILD_VMLINUX_LIBS). Most are built-in.o files
+# from top-level directories in the kernel tree, others are specified in
+# arch/$(ARCH)/Makefile. Ordering when linking is important, and
+# $(KBUILD_VMLINUX_INIT) must be first. $(KBUILD_VMLINUX_LIBS) are archives
+# which are linked conditionally (not within --whole-archive), and do not
+# require symbol indexes added.
#
# vmlinux
# ^
@@ -16,6 +19,9 @@
# +--< $(KBUILD_VMLINUX_MAIN)
# | +--< drivers/built-in.o mm/built-in.o + more
# |
+# +--< $(KBUILD_VMLINUX_LIBS)
+# | +--< lib/lib.a + more
+# |
# +-< ${kallsymso} (see description in KALLSYMS section)
#
# vmlinux version (uname -v) cannot be updated during normal
@@ -37,9 +43,10 @@ info()
fi
}
-# Thin archive build here makes a final archive with
-# symbol table and indexes from vmlinux objects, which can be
-# used as input to linker.
+# Thin archive build here makes a final archive with symbol table and indexes
+# from vmlinux objects INIT and MAIN, which can be used as input to linker.
+# KBUILD_VMLINUX_LIBS archives should already have symbol table and indexes
+# added.
#
# Traditional incremental style of link does not require this step
#
@@ -63,11 +70,17 @@ modpost_link()
local objects
if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
- objects="--whole-archive built-in.o --no-whole-archive"
+ objects="--whole-archive \
+ built-in.o \
+ --no-whole-archive \
+ --start-group \
+ ${KBUILD_VMLINUX_LIBS} \
+ --end-group"
else
objects="${KBUILD_VMLINUX_INIT} \
--start-group \
${KBUILD_VMLINUX_MAIN} \
+ ${KBUILD_VMLINUX_LIBS} \
--end-group"
fi
${LD} ${LDFLAGS} -r -o ${1} ${objects}
@@ -83,11 +96,18 @@ vmlinux_link()
if [ "${SRCARCH}" != "um" ]; then
if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
- objects="--whole-archive built-in.o ${1} --no-whole-archive"
+ objects="--whole-archive \
+ built-in.o \
+ --no-whole-archive \
+ --start-group \
+ ${KBUILD_VMLINUX_LIBS} \
+ --end-group \
+ ${1}"
else
objects="${KBUILD_VMLINUX_INIT} \
--start-group \
${KBUILD_VMLINUX_MAIN} \
+ ${KBUILD_VMLINUX_LIBS} \
--end-group \
${1}"
fi
@@ -96,11 +116,18 @@ vmlinux_link()
-T ${lds} ${objects}
else
if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
- objects="-Wl,--whole-archive built-in.o ${1} -Wl,--no-whole-archive"
+ objects="-Wl,--whole-archive \
+ built-in.o \
+ -Wl,--no-whole-archive \
+ -Wl,--start-group \
+ ${KBUILD_VMLINUX_LIBS} \
+ -Wl,--end-group \
+ ${1}"
else
objects="${KBUILD_VMLINUX_INIT} \
-Wl,--start-group \
${KBUILD_VMLINUX_MAIN} \
+ ${KBUILD_VMLINUX_LIBS} \
-Wl,--end-group \
${1}"
fi