0.2.15  hauto   File not found.   File not found.   |._ub &=LyY# #!/usr/bin/sh # SPDX-License-Identifier: GPL-2.0 # # link vmlinux # # vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_OBJS) and # $(KBUILD_VMLINUX_LIBS). Most are built-in.a files from top-level directories # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. # $(KBUILD_VMLINUX_LIBS) are archives which are linked conditionally # (not within --whole-archive), and do not require symbol indexes added. # # vmlinux # ^ # | # +--< $(KBUILD_VMLINUX_OBJS) # | +--< init/built-in.a drivers/built-in.a mm/built-in.a + more # | # +--< $(KBUILD_VMLINUX_LIBS) # | +--< lib/lib.a + more # | # +-< ${kallsymso} (see description in KALLSYMS section) # # vmlinux version (uname -v) cannot be updated during normal # descending-into-subdirs phase since we do not yet know if we need to # update vmlinux. # Therefore this step is delayed until just before final link of vmlinux. # # System.map is generated to document addresses of all kernel symbols # Error out on error set -e LD="$1" KBUILD_LDFLAGS="$2" LDFLAGS_vmlinux="$3" is_enabled() { grep -q "^$1=y" include/config/auto.conf } # RHEL-only workaround for missing upstream b42d23065024 # ("kbuild: factor out the common objtool arguments"), provide a means # to read configuration values for a key like CONFIG_FUNCTION_PADDING_BYTES config_value() { gawk -vkey="$1" -F= '$1==key{ print $NF }' include/config/auto.conf 2>/dev/null } # Nice output in kbuild format # Will be supressed by "make -s" info() { printf " %-7s %s\n" "${1}" "${2}" } # Link of vmlinux # ${1} - output file # ${2}, ${3}, ... - optional extra .o files vmlinux_link() { local output=${1} local objs local libs local ld local ldflags local ldlibs info LD ${output} # skip output file argument shift if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then # Use vmlinux.o instead of performing the slow LTO link again. objs=vmlinux.o libs= else objs="${KBUILD_VMLINUX_OBJS}" libs="${KBUILD_VMLINUX_LIBS}" fi if is_enabled CONFIG_MODULES; then objs="${objs} .vmlinux.export.o" fi if [ "${SRCARCH}" = "um" ]; then wl=-Wl, ld="${CC}" ldflags="${CFLAGS_vmlinux}" ldlibs="-lutil -lrt -lpthread" else wl= ld="${LD}" ldflags="${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}" ldlibs= fi ldflags="${ldflags} ${wl}--script=${objtree}/${KBUILD_LDS}" # The kallsyms linking does not need debug symbols included. if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then ldflags="${ldflags} ${wl}--strip-debug" fi if is_enabled CONFIG_VMLINUX_MAP; then ldflags="${ldflags} ${wl}-Map=${output}.map" fi ${ld} ${ldflags} -o ${output} \ ${wl}--whole-archive ${objs} ${wl}--no-whole-archive \ ${wl}--start-group ${libs} ${wl}--end-group \ $@ ${arch_vmlinux_o} ${ldlibs} } # generate .BTF typeinfo from DWARF debuginfo # ${1} - vmlinux image # ${2} - file to dump raw BTF data into gen_btf() { local pahole_ver if ! [ -x "$(command -v ${PAHOLE})" ]; then echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available" return 1 fi pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/') if [ "${pahole_ver}" -lt "116" ]; then echo >&2 "BTF: ${1}: pahole version $(${PAHOLE} --version) is too old, need at least v1.16" return 1 fi vmlinux_link ${1} info "BTF" ${2} LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${PAHOLE_FLAGS} ${1} # Create ${2} which contains just .BTF section but no symbols. Add # SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all # deletes all symbols including __start_BTF and __stop_BTF, which will # be redefined in the linker script. Add 2>/dev/null to suppress GNU # objcopy warnings: "empty loadable segment detected at ..." ${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \ --strip-all ${1} ${2} 2>/dev/null # Change e_type to ET_REL so that it can be used to link final vmlinux. # Unlik