1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0
  3#
  4# link vmlinux
  5#
  6# vmlinux is linked from the objects in vmlinux.a and $(KBUILD_VMLINUX_LIBS).
  7# vmlinux.a contains objects that are linked unconditionally.
 
  8# $(KBUILD_VMLINUX_LIBS) are archives which are linked conditionally
  9# (not within --whole-archive), and do not require symbol indexes added.
 10#
 11# vmlinux
 12#   ^
 13#   |
 14#   +--< vmlinux.a
 
 15#   |
 16#   +--< $(KBUILD_VMLINUX_LIBS)
 17#   |    +--< lib/lib.a + more
 18#   |
 19#   +-< ${kallsymso} (see description in KALLSYMS section)
 20#
 21# vmlinux version (uname -v) cannot be updated during normal
 22# descending-into-subdirs phase since we do not yet know if we need to
 23# update vmlinux.
 24# Therefore this step is delayed until just before final link of vmlinux.
 25#
 26# System.map is generated to document addresses of all kernel symbols
 27
 28# Error out on error
 29set -e
 30
 31LD="$1"
 32KBUILD_LDFLAGS="$2"
 33LDFLAGS_vmlinux="$3"
 34
 35is_enabled() {
 36	grep -q "^$1=y" include/config/auto.conf
 37}
 38
 39# Nice output in kbuild format
 40# Will be supressed by "make -s"
 41info()
 42{
 43	printf "  %-7s %s\n" "${1}" "${2}"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 44}
 45
 46# Link of vmlinux
 47# ${1} - output file
 
 48vmlinux_link()
 49{
 
 50	local output=${1}
 51	local objs
 52	local libs
 53	local ld
 54	local ldflags
 55	local ldlibs
 56
 57	info LD ${output}
 58
 59	# skip output file argument
 60	shift
 61
 62	if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then
 63		# Use vmlinux.o instead of performing the slow LTO link again.
 64		objs=vmlinux.o
 65		libs=
 66	else
 67		objs=vmlinux.a
 68		libs="${KBUILD_VMLINUX_LIBS}"
 69	fi
 70
 71	if is_enabled CONFIG_GENERIC_BUILTIN_DTB; then
 72		objs="${objs} .builtin-dtbs.o"
 73	fi
 74
 75	if is_enabled CONFIG_MODULES; then
 76		objs="${objs} .vmlinux.export.o"
 77	fi
 78
 79	objs="${objs} init/version-timestamp.o"
 80
 81	if [ "${SRCARCH}" = "um" ]; then
 82		wl=-Wl,
 83		ld="${CC}"
 84		ldflags="${CFLAGS_vmlinux}"
 85		ldlibs="-lutil -lrt -lpthread"
 86	else
 87		wl=
 88		ld="${LD}"
 89		ldflags="${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}"
 90		ldlibs=
 91	fi
 92
 93	ldflags="${ldflags} ${wl}--script=${objtree}/${KBUILD_LDS}"
 94
 95	# The kallsyms linking does not need debug symbols included.
 96	if [ -n "${strip_debug}" ] ; then
 97		ldflags="${ldflags} ${wl}--strip-debug"
 98	fi
 99
100	if is_enabled CONFIG_VMLINUX_MAP; then
101		ldflags="${ldflags} ${wl}-Map=${output}.map"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
102	fi
103
104	${ld} ${ldflags} -o ${output}					\
105		${wl}--whole-archive ${objs} ${wl}--no-whole-archive	\
106		${wl}--start-group ${libs} ${wl}--end-group		\
107		${kallsymso} ${btf_vmlinux_bin_o} ${arch_vmlinux_o} ${ldlibs}
108}
109
110# generate .BTF typeinfo from DWARF debuginfo
111# ${1} - vmlinux image
 
112gen_btf()
113{
114	local btf_data=${1}.btf.o
 
 
 
 
 
 
 
 
 
 
 
115
116	info BTF "${btf_data}"
117	LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${PAHOLE_FLAGS} ${1}
118
119	# Create ${btf_data} which contains just .BTF section but no symbols. Add
 
 
 
120	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
121	# deletes all symbols including __start_BTF and __stop_BTF, which will
122	# be redefined in the linker script. Add 2>/dev/null to suppress GNU
123	# objcopy warnings: "empty loadable segment detected at ..."
124	${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \
125		--strip-all ${1} "${btf_data}" 2>/dev/null
126	# Change e_type to ET_REL so that it can be used to link final vmlinux.
127	# GNU ld 2.35+ and lld do not allow an ET_EXEC input.
128	if is_enabled CONFIG_CPU_BIG_ENDIAN; then
129		et_rel='\0\1'
130	else
131		et_rel='\1\0'
132	fi
133	printf "${et_rel}" | dd of="${btf_data}" conv=notrunc bs=1 seek=16 status=none
134
135	btf_vmlinux_bin_o=${btf_data}
136}
137
138# Create ${2}.o file with all symbols from the ${1} object file
139kallsyms()
140{
 
141	local kallsymopt;
142
143	if is_enabled CONFIG_KALLSYMS_ALL; then
144		kallsymopt="${kallsymopt} --all-symbols"
145	fi
146
147	if is_enabled CONFIG_KALLSYMS_ABSOLUTE_PERCPU; then
148		kallsymopt="${kallsymopt} --absolute-percpu"
149	fi
150
151	info KSYMS "${2}.S"
152	scripts/kallsyms ${kallsymopt} "${1}" > "${2}.S"
 
 
 
 
153
154	info AS "${2}.o"
155	${CC} ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS} \
156	      ${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} -c -o "${2}.o" "${2}.S"
157
158	kallsymso=${2}.o
 
159}
160
161# Perform kallsyms for the given temporary vmlinux.
162sysmap_and_kallsyms()
 
163{
164	mksysmap "${1}" "${1}.syms"
165	kallsyms "${1}.syms" "${1}.kallsyms"
 
166
167	kallsyms_sysmap=${1}.syms
 
168}
169
170# Create map file with all symbols from ${1}
171# See mksymap for additional details
172mksysmap()
173{
174	info NM ${2}
175	${NM} -n "${1}" | sed -f "${srctree}/scripts/mksysmap" > "${2}"
176}
177
178sorttable()
179{
180	${objtree}/scripts/sorttable ${1}
181}
182
 
183cleanup()
184{
185	rm -f .btf.*
 
 
186	rm -f System.map
187	rm -f vmlinux
188	rm -f vmlinux.map
 
 
 
 
 
 
 
 
 
 
 
 
 
189}
 
190
191# Use "make V=1" to debug this script
192case "${KBUILD_VERBOSE}" in
193*1*)
194	set -x
195	;;
196esac
197
198if [ "$1" = "clean" ]; then
199	cleanup
200	exit 0
201fi
202
203${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init init/version-timestamp.o
204
205arch_vmlinux_o=
206if is_enabled CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX; then
207	arch_vmlinux_o=arch/${SRCARCH}/tools/vmlinux.arch.o
208fi
209
210btf_vmlinux_bin_o=
211kallsymso=
212strip_debug=
213
214if is_enabled CONFIG_KALLSYMS; then
215	true > .tmp_vmlinux0.syms
216	kallsyms .tmp_vmlinux0.syms .tmp_vmlinux0.kallsyms
217fi
218
219if is_enabled CONFIG_KALLSYMS || is_enabled CONFIG_DEBUG_INFO_BTF; then
220
221	# The kallsyms linking does not need debug symbols, but the BTF does.
222	if ! is_enabled CONFIG_DEBUG_INFO_BTF; then
223		strip_debug=1
224	fi
225
226	vmlinux_link .tmp_vmlinux1
227fi
228
229if is_enabled CONFIG_DEBUG_INFO_BTF; then
230	if ! gen_btf .tmp_vmlinux1; then
 
 
 
 
 
 
 
 
 
 
 
231		echo >&2 "Failed to generate BTF for vmlinux"
232		echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF"
233		exit 1
234	fi
235fi
236
237if is_enabled CONFIG_KALLSYMS; then
 
 
 
238
239	# kallsyms support
240	# Generate section listing all symbols and add it into vmlinux
241	# It's a four step process:
242	# 0)  Generate a dummy __kallsyms with empty symbol list.
243	# 1)  Link .tmp_vmlinux1.kallsyms so it has all symbols and sections,
244	#     with a dummy __kallsyms.
245	#     Running kallsyms on that gives us .tmp_vmlinux1.kallsyms.o with
246	#     the right size
247	# 2)  Link .tmp_vmlinux2.kallsyms so it now has a __kallsyms section of
248	#     the right size, but due to the added section, some
249	#     addresses have shifted.
250	#     From here, we generate a correct .tmp_vmlinux2.kallsyms.o
251	# 3)  That link may have expanded the kernel image enough that
252	#     more linker branch stubs / trampolines had to be added, which
253	#     introduces new names, which further expands kallsyms. Do another
254	#     pass if that is the case. In theory it's possible this results
255	#     in even more stubs, but unlikely.
256	#     KALLSYMS_EXTRA_PASS=1 may also used to debug or work around
257	#     other bugs.
258	# 4)  The correct ${kallsymso} is linked into the final vmlinux.
259	#
260	# a)  Verify that the System.map from vmlinux matches the map from
261	#     ${kallsymso}.
262
263	# The kallsyms linking does not need debug symbols included.
264	strip_debug=1
265
266	sysmap_and_kallsyms .tmp_vmlinux1
267	size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
268
269	vmlinux_link .tmp_vmlinux2
270	sysmap_and_kallsyms .tmp_vmlinux2
271	size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
272
273	if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
274		vmlinux_link .tmp_vmlinux3
275		sysmap_and_kallsyms .tmp_vmlinux3
276	fi
277fi
278
279strip_debug=
280
281vmlinux_link vmlinux
282
283# fill in BTF IDs
284if is_enabled CONFIG_DEBUG_INFO_BTF; then
285	info BTFIDS vmlinux
286	${RESOLVE_BTFIDS} vmlinux
287fi
288
289mksysmap vmlinux System.map
290
291if is_enabled CONFIG_BUILDTIME_TABLE_SORT; then
292	info SORTTAB vmlinux
293	if ! sorttable vmlinux; then
294		echo >&2 Failed to sort kernel tables
295		exit 1
296	fi
297fi
298
 
 
 
299# step a (see comment above)
300if is_enabled CONFIG_KALLSYMS; then
301	if ! cmp -s System.map "${kallsyms_sysmap}"; then
 
 
302		echo >&2 Inconsistent kallsyms data
303		echo >&2 'Try "make KALLSYMS_EXTRA_PASS=1" as a workaround'
304		exit 1
305	fi
306fi
307
308# For fixdep
309echo "vmlinux: $0" > .vmlinux.d

  1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0
  3#
  4# link vmlinux
  5#
  6# vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_OBJS) and
  7# $(KBUILD_VMLINUX_LIBS). Most are built-in.a files from top-level directories
  8# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  9# $(KBUILD_VMLINUX_LIBS) are archives which are linked conditionally
 10# (not within --whole-archive), and do not require symbol indexes added.
 11#
 12# vmlinux
 13#   ^
 14#   |
 15#   +--< $(KBUILD_VMLINUX_OBJS)
 16#   |    +--< init/built-in.a drivers/built-in.a mm/built-in.a + more
 17#   |
 18#   +--< $(KBUILD_VMLINUX_LIBS)
 19#   |    +--< lib/lib.a + more
 20#   |
 21#   +-< ${kallsymso} (see description in KALLSYMS section)
 22#
 23# vmlinux version (uname -v) cannot be updated during normal
 24# descending-into-subdirs phase since we do not yet know if we need to
 25# update vmlinux.
 26# Therefore this step is delayed until just before final link of vmlinux.
 27#
 28# System.map is generated to document addresses of all kernel symbols
 29
 30# Error out on error
 31set -e
 32
 33LD="$1"
 34KBUILD_LDFLAGS="$2"
 35LDFLAGS_vmlinux="$3"
 36
 
 
 
 
 37# Nice output in kbuild format
 38# Will be supressed by "make -s"
 39info()
 40{
 41	if [ "${quiet}" != "silent_" ]; then
 42		printf "  %-7s %s\n" "${1}" "${2}"
 43	fi
 44}
 45
 46# Link of vmlinux.o used for section mismatch analysis
 47# ${1} output file
 48modpost_link()
 49{
 50	local objects
 51
 52	objects="--whole-archive				\
 53		${KBUILD_VMLINUX_OBJS}				\
 54		--no-whole-archive				\
 55		--start-group					\
 56		${KBUILD_VMLINUX_LIBS}				\
 57		--end-group"
 58
 59	${LD} ${KBUILD_LDFLAGS} -r -o ${1} ${objects}
 60}
 61
 62objtool_link()
 63{
 64	local objtoolopt;
 65
 66	if [ -n "${CONFIG_VMLINUX_VALIDATION}" ]; then
 67		objtoolopt="check"
 68		if [ -z "${CONFIG_FRAME_POINTER}" ]; then
 69			objtoolopt="${objtoolopt} --no-fp"
 70		fi
 71		if [ -n "${CONFIG_GCOV_KERNEL}" ]; then
 72			objtoolopt="${objtoolopt} --no-unreachable"
 73		fi
 74		if [ -n "${CONFIG_RETPOLINE}" ]; then
 75			objtoolopt="${objtoolopt} --retpoline"
 76		fi
 77		if [ -n "${CONFIG_X86_SMAP}" ]; then
 78			objtoolopt="${objtoolopt} --uaccess"
 79		fi
 80		info OBJTOOL ${1}
 81		tools/objtool/objtool ${objtoolopt} ${1}
 82	fi
 83}
 84
 85# Link of vmlinux
 86# ${1} - output file
 87# ${2}, ${3}, ... - optional extra .o files
 88vmlinux_link()
 89{
 90	local lds="${objtree}/${KBUILD_LDS}"
 91	local output=${1}
 92	local objects
 93	local strip_debug
 
 
 
 94
 95	info LD ${output}
 96
 97	# skip output file argument
 98	shift
 99
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
100	# The kallsyms linking does not need debug symbols included.
101	if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then
102		strip_debug=-Wl,--strip-debug
103	fi
104
105	if [ "${SRCARCH}" != "um" ]; then
106		objects="--whole-archive			\
107			${KBUILD_VMLINUX_OBJS}			\
108			--no-whole-archive			\
109			--start-group				\
110			${KBUILD_VMLINUX_LIBS}			\
111			--end-group				\
112			${@}"
113
114		${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}	\
115			${strip_debug#-Wl,}			\
116			-o ${output}				\
117			-T ${lds} ${objects}
118	else
119		objects="-Wl,--whole-archive			\
120			${KBUILD_VMLINUX_OBJS}			\
121			-Wl,--no-whole-archive			\
122			-Wl,--start-group			\
123			${KBUILD_VMLINUX_LIBS}			\
124			-Wl,--end-group				\
125			${@}"
126
127		${CC} ${CFLAGS_vmlinux}				\
128			${strip_debug}				\
129			-o ${output}				\
130			-Wl,-T,${lds}				\
131			${objects}				\
132			-lutil -lrt -lpthread
133		rm -f linux
134	fi
 
 
 
 
 
135}
136
137# generate .BTF typeinfo from DWARF debuginfo
138# ${1} - vmlinux image
139# ${2} - file to dump raw BTF data into
140gen_btf()
141{
142	local pahole_ver
143
144	if ! [ -x "$(command -v ${PAHOLE})" ]; then
145		echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available"
146		return 1
147	fi
148
149	pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/')
150	if [ "${pahole_ver}" -lt "116" ]; then
151		echo >&2 "BTF: ${1}: pahole version $(${PAHOLE} --version) is too old, need at least v1.16"
152		return 1
153	fi
154
155	vmlinux_link ${1}
 
156
157	info "BTF" ${2}
158	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
159
160	# Create ${2} which contains just .BTF section but no symbols. Add
161	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
162	# deletes all symbols including __start_BTF and __stop_BTF, which will
163	# be redefined in the linker script. Add 2>/dev/null to suppress GNU
164	# objcopy warnings: "empty loadable segment detected at ..."
165	${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \
166		--strip-all ${1} ${2} 2>/dev/null
167	# Change e_type to ET_REL so that it can be used to link final vmlinux.
168	# Unlike GNU ld, lld does not allow an ET_EXEC input.
169	printf '\1' | dd of=${2} conv=notrunc bs=1 seek=16 status=none
 
 
 
 
 
 
 
170}
171
172# Create ${2} .o file with all symbols from the ${1} object file
173kallsyms()
174{
175	info KSYM ${2}
176	local kallsymopt;
177
178	if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then
179		kallsymopt="${kallsymopt} --all-symbols"
180	fi
181
182	if [ -n "${CONFIG_KALLSYMS_ABSOLUTE_PERCPU}" ]; then
183		kallsymopt="${kallsymopt} --absolute-percpu"
184	fi
185
186	if [ -n "${CONFIG_KALLSYMS_BASE_RELATIVE}" ]; then
187		kallsymopt="${kallsymopt} --base-relative"
188	fi
189
190	local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL}               \
191		      ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
192
193	local afile="`basename ${2} .o`.S"
 
 
194
195	${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${afile}
196	${CC} ${aflags} -c -o ${2} ${afile}
197}
198
199# Perform one step in kallsyms generation, including temporary linking of
200# vmlinux.
201kallsyms_step()
202{
203	kallsymso_prev=${kallsymso}
204	kallsyms_vmlinux=.tmp_vmlinux.kallsyms${1}
205	kallsymso=${kallsyms_vmlinux}.o
206
207	vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o}
208	kallsyms ${kallsyms_vmlinux} ${kallsymso}
209}
210
211# Create map file with all symbols from ${1}
212# See mksymap for additional details
213mksysmap()
214{
215	${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2}
 
216}
217
218sorttable()
219{
220	${objtree}/scripts/sorttable ${1}
221}
222
223# Delete output files in case of error
224cleanup()
225{
226	rm -f .btf.*
227	rm -f .tmp_System.map
228	rm -f .tmp_vmlinux*
229	rm -f System.map
230	rm -f vmlinux
231	rm -f vmlinux.o
232}
233
234on_exit()
235{
236	if [ $? -ne 0 ]; then
237		cleanup
238	fi
239}
240trap on_exit EXIT
241
242on_signals()
243{
244	exit 1
245}
246trap on_signals HUP INT QUIT TERM
247
248# Use "make V=1" to debug this script
249case "${KBUILD_VERBOSE}" in
250*1*)
251	set -x
252	;;
253esac
254
255if [ "$1" = "clean" ]; then
256	cleanup
257	exit 0
258fi
259
260# We need access to CONFIG_ symbols
261. include/config/auto.conf
 
 
 
 
262
263# Update version
264info GEN .version
265if [ -r .version ]; then
266	VERSION=$(expr 0$(cat .version) + 1)
267	echo $VERSION > .version
268else
269	rm -f .version
270	echo 1 > .version
271fi;
272
273# final build of init/
274${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1
275
276#link vmlinux.o
277info LD vmlinux.o
278modpost_link vmlinux.o
279objtool_link vmlinux.o
280
281# modpost vmlinux.o to check for section mismatches
282${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1
283
284info MODINFO modules.builtin.modinfo
285${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
286info GEN modules.builtin
287# The second line aids cases where multiple modules share the same object.
288tr '\0' '\n' < modules.builtin.modinfo | sed -n 's/^[[:alnum:]:_]*\.file=//p' |
289	tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$/.ko/' > modules.builtin
290
291btf_vmlinux_bin_o=""
292if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
293	btf_vmlinux_bin_o=.btf.vmlinux.bin.o
294	if ! gen_btf .tmp_vmlinux.btf $btf_vmlinux_bin_o ; then
295		echo >&2 "Failed to generate BTF for vmlinux"
296		echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF"
297		exit 1
298	fi
299fi
300
301kallsymso=""
302kallsymso_prev=""
303kallsyms_vmlinux=""
304if [ -n "${CONFIG_KALLSYMS}" ]; then
305
306	# kallsyms support
307	# Generate section listing all symbols and add it into vmlinux
308	# It's a three step process:
309	# 1)  Link .tmp_vmlinux1 so it has all symbols and sections,
310	#     but __kallsyms is empty.
311	#     Running kallsyms on that gives us .tmp_kallsyms1.o with
 
312	#     the right size
313	# 2)  Link .tmp_vmlinux2 so it now has a __kallsyms section of
314	#     the right size, but due to the added section, some
315	#     addresses have shifted.
316	#     From here, we generate a correct .tmp_kallsyms2.o
317	# 3)  That link may have expanded the kernel image enough that
318	#     more linker branch stubs / trampolines had to be added, which
319	#     introduces new names, which further expands kallsyms. Do another
320	#     pass if that is the case. In theory it's possible this results
321	#     in even more stubs, but unlikely.
322	#     KALLSYMS_EXTRA_PASS=1 may also used to debug or work around
323	#     other bugs.
324	# 4)  The correct ${kallsymso} is linked into the final vmlinux.
325	#
326	# a)  Verify that the System.map from vmlinux matches the map from
327	#     ${kallsymso}.
328
329	kallsyms_step 1
330	kallsyms_step 2
 
 
 
331
332	# step 3
333	size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso_prev})
334	size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
335
336	if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
337		kallsyms_step 3
 
338	fi
339fi
340
341vmlinux_link vmlinux "${kallsymso}" ${btf_vmlinux_bin_o}
 
 
342
343# fill in BTF IDs
344if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
345info BTFIDS vmlinux
346${RESOLVE_BTFIDS} vmlinux
347fi
348
349if [ -n "${CONFIG_BUILDTIME_TABLE_SORT}" ]; then
 
 
350	info SORTTAB vmlinux
351	if ! sorttable vmlinux; then
352		echo >&2 Failed to sort kernel tables
353		exit 1
354	fi
355fi
356
357info SYSMAP System.map
358mksysmap vmlinux System.map
359
360# step a (see comment above)
361if [ -n "${CONFIG_KALLSYMS}" ]; then
362	mksysmap ${kallsyms_vmlinux} .tmp_System.map
363
364	if ! cmp -s System.map .tmp_System.map; then
365		echo >&2 Inconsistent kallsyms data
366		echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround
367		exit 1
368	fi
369fi