diff options
Diffstat (limited to 'scripts/link-vmlinux.sh')
| -rwxr-xr-x | scripts/link-vmlinux.sh | 86 |
1 files changed, 37 insertions, 49 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 67e66333bd2a..f99e196abeea 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -31,6 +31,7 @@ set -e LD="$1" KBUILD_LDFLAGS="$2" LDFLAGS_vmlinux="$3" +VMLINUX="$4" is_enabled() { grep -q "^$1=y" include/config/auto.conf @@ -59,7 +60,8 @@ vmlinux_link() # skip output file argument shift - if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then + if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT || + is_enabled CONFIG_KLP_BUILD; then # Use vmlinux.o instead of performing the slow LTO link again. objs=vmlinux.o libs= @@ -72,10 +74,7 @@ vmlinux_link() objs="${objs} .builtin-dtbs.o" fi - if is_enabled CONFIG_MODULES; then - objs="${objs} .vmlinux.export.o" - fi - + objs="${objs} .vmlinux.export.o" objs="${objs} init/version-timestamp.o" if [ "${SRCARCH}" = "um" ]; then @@ -97,8 +96,8 @@ vmlinux_link() ldflags="${ldflags} ${wl}--strip-debug" fi - if is_enabled CONFIG_VMLINUX_MAP; then - ldflags="${ldflags} ${wl}-Map=${output}.map" + if [ -n "${generate_map}" ]; then + ldflags="${ldflags} ${wl}-Map=vmlinux.map" fi ${ld} ${ldflags} -o ${output} \ @@ -107,34 +106,6 @@ vmlinux_link() ${kallsymso} ${btf_vmlinux_bin_o} ${arch_vmlinux_o} ${ldlibs} } -# generate .BTF typeinfo from DWARF debuginfo -# ${1} - vmlinux image -gen_btf() -{ - local btf_data=${1}.btf.o - - info BTF "${btf_data}" - LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${PAHOLE_FLAGS} ${1} - - # Create ${btf_data} 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 ${1} "${btf_data}" 2>/dev/null - # Change e_type to ET_REL so that it can be used to link final vmlinux. - # GNU ld 2.35+ and lld do not allow an ET_EXEC input. - if is_enabled CONFIG_CPU_BIG_ENDIAN; then - et_rel='\0\1' - else - et_rel='\1\0' - fi - printf "${et_rel}" | dd of="${btf_data}" conv=notrunc bs=1 seek=16 status=none - - btf_vmlinux_bin_o=${btf_data} -} - # Create ${2}.o file with all symbols from the ${1} object file kallsyms() { @@ -144,6 +115,10 @@ kallsyms() kallsymopt="${kallsymopt} --all-symbols" fi + if is_enabled CONFIG_64BIT || is_enabled CONFIG_RELOCATABLE; then + kallsymopt="${kallsymopt} --pc-relative" + fi + info KSYMS "${2}.S" scripts/kallsyms ${kallsymopt} "${1}" > "${2}.S" @@ -173,12 +148,14 @@ mksysmap() sorttable() { - ${objtree}/scripts/sorttable ${1} + ${NM} -S ${1} > .tmp_vmlinux.nm-sort + ${objtree}/scripts/sorttable -s .tmp_vmlinux.nm-sort ${1} } cleanup() { rm -f .btf.* + rm -f .tmp_vmlinux.nm-sort rm -f System.map rm -f vmlinux rm -f vmlinux.map @@ -204,8 +181,17 @@ if is_enabled CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX; then fi btf_vmlinux_bin_o= +btfids_vmlinux= kallsymso= strip_debug= +generate_map= + +# Use "make UT=1" to trigger warnings on unused tracepoints +case "${WARN_ON_UNUSED_TRACEPOINTS}" in +*1*) + ${objtree}/scripts/tracepoint-update vmlinux.o + ;; +esac if is_enabled CONFIG_KALLSYMS; then true > .tmp_vmlinux0.syms @@ -223,11 +209,14 @@ if is_enabled CONFIG_KALLSYMS || is_enabled CONFIG_DEBUG_INFO_BTF; then fi if is_enabled CONFIG_DEBUG_INFO_BTF; then - if ! gen_btf .tmp_vmlinux1; then + info BTF .tmp_vmlinux1 + if ! ${CONFIG_SHELL} ${srctree}/scripts/gen-btf.sh .tmp_vmlinux1; then echo >&2 "Failed to generate BTF for vmlinux" echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF" exit 1 fi + btf_vmlinux_bin_o=.tmp_vmlinux1.btf.o + btfids_vmlinux=.tmp_vmlinux1.BTF_ids fi if is_enabled CONFIG_KALLSYMS; then @@ -274,23 +263,22 @@ fi strip_debug= -vmlinux_link vmlinux +if is_enabled CONFIG_VMLINUX_MAP; then + generate_map=1 +fi + +vmlinux_link "${VMLINUX}" -# fill in BTF IDs if is_enabled CONFIG_DEBUG_INFO_BTF; then - info BTFIDS vmlinux - RESOLVE_BTFIDS_ARGS="" - if is_enabled CONFIG_WERROR; then - RESOLVE_BTFIDS_ARGS=" --fatal_warnings " - fi - ${RESOLVE_BTFIDS} ${RESOLVE_BTFIDS_ARGS} vmlinux + info BTFIDS ${VMLINUX} + ${RESOLVE_BTFIDS} --patch_btfids ${btfids_vmlinux} ${VMLINUX} fi -mksysmap vmlinux System.map +mksysmap "${VMLINUX}" System.map if is_enabled CONFIG_BUILDTIME_TABLE_SORT; then - info SORTTAB vmlinux - if ! sorttable vmlinux; then + info SORTTAB "${VMLINUX}" + if ! sorttable "${VMLINUX}"; then echo >&2 Failed to sort kernel tables exit 1 fi @@ -306,4 +294,4 @@ if is_enabled CONFIG_KALLSYMS; then fi # For fixdep -echo "vmlinux: $0" > .vmlinux.d +echo "${VMLINUX}: $0" > ".${VMLINUX}.d" |