diff options
| -rw-r--r-- | Documentation/kbuild/kbuild.txt | 8 | ||||
| -rw-r--r-- | Makefile | 8 | ||||
| -rwxr-xr-x | scripts/link-vmlinux.sh | 45 |
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. @@ -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 |