Commit | Line | Data |
---|---|---|
1f2bfbd0 | 1 | #!/bin/sh |
b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
1f2bfbd0 SR |
3 | # |
4 | # link vmlinux | |
5 | # | |
6 | # vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_INIT) and | |
3a166fc2 NP |
7 | # $(KBUILD_VMLINUX_MAIN) and $(KBUILD_VMLINUX_LIBS). Most are built-in.o files |
8 | # from top-level directories in the kernel tree, others are specified in | |
9 | # arch/$(ARCH)/Makefile. Ordering when linking is important, and | |
10 | # $(KBUILD_VMLINUX_INIT) must be first. $(KBUILD_VMLINUX_LIBS) are archives | |
11 | # which are linked conditionally (not within --whole-archive), and do not | |
12 | # require symbol indexes added. | |
1f2bfbd0 SR |
13 | # |
14 | # vmlinux | |
15 | # ^ | |
16 | # | | |
17 | # +-< $(KBUILD_VMLINUX_INIT) | |
18 | # | +--< init/version.o + more | |
19 | # | | |
20 | # +--< $(KBUILD_VMLINUX_MAIN) | |
21 | # | +--< drivers/built-in.o mm/built-in.o + more | |
22 | # | | |
3a166fc2 NP |
23 | # +--< $(KBUILD_VMLINUX_LIBS) |
24 | # | +--< lib/lib.a + more | |
25 | # | | |
1f2bfbd0 SR |
26 | # +-< ${kallsymso} (see description in KALLSYMS section) |
27 | # | |
28 | # vmlinux version (uname -v) cannot be updated during normal | |
29 | # descending-into-subdirs phase since we do not yet know if we need to | |
30 | # update vmlinux. | |
31 | # Therefore this step is delayed until just before final link of vmlinux. | |
32 | # | |
33 | # System.map is generated to document addresses of all kernel symbols | |
34 | ||
35 | # Error out on error | |
36 | set -e | |
37 | ||
38 | # Nice output in kbuild format | |
39 | # Will be supressed by "make -s" | |
40 | info() | |
41 | { | |
42 | if [ "${quiet}" != "silent_" ]; then | |
43 | printf " %-7s %s\n" ${1} ${2} | |
44 | fi | |
45 | } | |
46 | ||
3a166fc2 NP |
47 | # Thin archive build here makes a final archive with symbol table and indexes |
48 | # from vmlinux objects INIT and MAIN, which can be used as input to linker. | |
49 | # KBUILD_VMLINUX_LIBS archives should already have symbol table and indexes | |
50 | # added. | |
a5967db9 SR |
51 | # |
52 | # Traditional incremental style of link does not require this step | |
53 | # | |
54 | # built-in.o output file | |
55 | # | |
56 | archive_builtin() | |
57 | { | |
58 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then | |
59 | info AR built-in.o | |
60 | rm -f built-in.o; | |
9a6cfca4 | 61 | ${AR} rcsTP${KBUILD_ARFLAGS} built-in.o \ |
a5967db9 SR |
62 | ${KBUILD_VMLINUX_INIT} \ |
63 | ${KBUILD_VMLINUX_MAIN} | |
af1f94d0 ST |
64 | |
65 | if [ -n "${CONFIG_LTO_CLANG}" ]; then | |
66 | mv -f built-in.o built-in.o.tmp | |
67 | ${LLVM_AR} rcsT${KBUILD_ARFLAGS} built-in.o $(${AR} t built-in.o.tmp) | |
68 | rm -f built-in.o.tmp | |
69 | fi | |
a5967db9 SR |
70 | fi |
71 | } | |
72 | ||
af1f94d0 ST |
73 | # If CONFIG_LTO_CLANG is selected, collect generated symbol versions into |
74 | # .tmp_symversions | |
75 | modversions() | |
76 | { | |
77 | if [ -z "${CONFIG_LTO_CLANG}" ]; then | |
78 | return | |
a5967db9 | 79 | fi |
af1f94d0 ST |
80 | |
81 | if [ -z "${CONFIG_MODVERSIONS}" ]; then | |
82 | return | |
83 | fi | |
84 | ||
85 | rm -f .tmp_symversions | |
86 | ||
87 | for a in built-in.o ${KBUILD_VMLINUX_LIBS}; do | |
88 | for o in $(${AR} t $a); do | |
89 | if [ -f ${o}.symversions ]; then | |
90 | cat ${o}.symversions >> .tmp_symversions | |
91 | fi | |
92 | done | |
93 | done | |
94 | ||
95 | echo "-T .tmp_symversions" | |
a5967db9 SR |
96 | } |
97 | ||
1f2bfbd0 SR |
98 | # Link of vmlinux.o used for section mismatch analysis |
99 | # ${1} output file | |
100 | modpost_link() | |
101 | { | |
a5967db9 SR |
102 | local objects |
103 | ||
104 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then | |
3a166fc2 NP |
105 | objects="--whole-archive \ |
106 | built-in.o \ | |
107 | --no-whole-archive \ | |
108 | --start-group \ | |
109 | ${KBUILD_VMLINUX_LIBS} \ | |
110 | --end-group" | |
a5967db9 SR |
111 | else |
112 | objects="${KBUILD_VMLINUX_INIT} \ | |
113 | --start-group \ | |
114 | ${KBUILD_VMLINUX_MAIN} \ | |
3a166fc2 | 115 | ${KBUILD_VMLINUX_LIBS} \ |
a5967db9 SR |
116 | --end-group" |
117 | fi | |
af1f94d0 ST |
118 | |
119 | if [ -n "${CONFIG_LTO_CLANG}" ]; then | |
120 | # This might take a while, so indicate that we're doing | |
121 | # an LTO link | |
122 | info LTO vmlinux.o | |
123 | else | |
124 | info LD vmlinux.o | |
125 | fi | |
126 | ||
127 | ${LD} ${LDFLAGS} -r -o ${1} $(modversions) ${objects} | |
1f2bfbd0 SR |
128 | } |
129 | ||
9abcee51 ST |
130 | # If CONFIG_LTO_CLANG is selected, we postpone running recordmcount until |
131 | # we have compiled LLVM IR to an object file. | |
132 | recordmcount() | |
133 | { | |
134 | if [ -z "${CONFIG_LTO_CLANG}" ]; then | |
135 | return | |
136 | fi | |
137 | ||
138 | if [ -n "${CONFIG_FTRACE_MCOUNT_RECORD}" ]; then | |
139 | scripts/recordmcount ${RECORDMCOUNT_FLAGS} $* | |
140 | fi | |
1f2bfbd0 SR |
141 | } |
142 | ||
143 | # Link of vmlinux | |
144 | # ${1} - optional extra .o files | |
145 | # ${2} - output file | |
146 | vmlinux_link() | |
147 | { | |
148 | local lds="${objtree}/${KBUILD_LDS}" | |
a5967db9 | 149 | local objects |
1f2bfbd0 SR |
150 | |
151 | if [ "${SRCARCH}" != "um" ]; then | |
af1f94d0 ST |
152 | local ld=${LD} |
153 | local ldflags="${LDFLAGS} ${LDFLAGS_vmlinux}" | |
154 | ||
155 | if [ -n "${LDFINAL_vmlinux}" ]; then | |
156 | ld=${LDFINAL_vmlinux} | |
157 | ldflags="${LDFLAGS_FINAL_vmlinux} ${LDFLAGS_vmlinux}" | |
158 | fi | |
159 | ||
160 | if [[ -n "${CONFIG_THIN_ARCHIVES}" && -z "${CONFIG_LTO_CLANG}" ]]; then | |
161 | objects="--whole-archive \ | |
3a166fc2 NP |
162 | built-in.o \ |
163 | --no-whole-archive \ | |
164 | --start-group \ | |
165 | ${KBUILD_VMLINUX_LIBS} \ | |
166 | --end-group \ | |
167 | ${1}" | |
a5967db9 SR |
168 | else |
169 | objects="${KBUILD_VMLINUX_INIT} \ | |
170 | --start-group \ | |
171 | ${KBUILD_VMLINUX_MAIN} \ | |
3a166fc2 | 172 | ${KBUILD_VMLINUX_LIBS} \ |
a5967db9 SR |
173 | --end-group \ |
174 | ${1}" | |
175 | fi | |
176 | ||
af1f94d0 | 177 | ${ld} ${ldflags} -o ${2} -T ${lds} ${objects} |
1f2bfbd0 | 178 | else |
a5967db9 | 179 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then |
3a166fc2 NP |
180 | objects="-Wl,--whole-archive \ |
181 | built-in.o \ | |
182 | -Wl,--no-whole-archive \ | |
183 | -Wl,--start-group \ | |
184 | ${KBUILD_VMLINUX_LIBS} \ | |
185 | -Wl,--end-group \ | |
186 | ${1}" | |
a5967db9 SR |
187 | else |
188 | objects="${KBUILD_VMLINUX_INIT} \ | |
189 | -Wl,--start-group \ | |
190 | ${KBUILD_VMLINUX_MAIN} \ | |
3a166fc2 | 191 | ${KBUILD_VMLINUX_LIBS} \ |
a5967db9 SR |
192 | -Wl,--end-group \ |
193 | ${1}" | |
194 | fi | |
195 | ||
196 | ${CC} ${CFLAGS_vmlinux} -o ${2} \ | |
197 | -Wl,-T,${lds} \ | |
198 | ${objects} \ | |
199 | -lutil -lrt -lpthread | |
1f2bfbd0 SR |
200 | rm -f linux |
201 | fi | |
202 | } | |
203 | ||
1f2bfbd0 SR |
204 | # Create ${2} .o file with all symbols from the ${1} object file |
205 | kallsyms() | |
206 | { | |
207 | info KSYM ${2} | |
208 | local kallsymopt; | |
209 | ||
b92021b0 RR |
210 | if [ -n "${CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX}" ]; then |
211 | kallsymopt="${kallsymopt} --symbol-prefix=_" | |
6895f97e JH |
212 | fi |
213 | ||
1f2bfbd0 | 214 | if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then |
6895f97e | 215 | kallsymopt="${kallsymopt} --all-symbols" |
1f2bfbd0 SR |
216 | fi |
217 | ||
4d5d5664 | 218 | if [ -n "${CONFIG_KALLSYMS_ABSOLUTE_PERCPU}" ]; then |
c6bda7c9 RR |
219 | kallsymopt="${kallsymopt} --absolute-percpu" |
220 | fi | |
221 | ||
2213e9a6 AB |
222 | if [ -n "${CONFIG_KALLSYMS_BASE_RELATIVE}" ]; then |
223 | kallsymopt="${kallsymopt} --base-relative" | |
224 | fi | |
225 | ||
00e6c28c SR |
226 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
227 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" | |
1f2bfbd0 | 228 | |
a0439342 AB |
229 | local afile="`basename ${2} .o`.S" |
230 | ||
231 | ${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${afile} | |
232 | ${CC} ${aflags} -c -o ${2} ${afile} | |
1f2bfbd0 SR |
233 | } |
234 | ||
235 | # Create map file with all symbols from ${1} | |
236 | # See mksymap for additional details | |
237 | mksysmap() | |
238 | { | |
239 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} | |
240 | } | |
241 | ||
1347a2ce LT |
242 | sortextable() |
243 | { | |
244 | ${objtree}/scripts/sortextable ${1} | |
245 | } | |
246 | ||
1f2bfbd0 | 247 | # Delete output files in case of error |
1f2bfbd0 SR |
248 | cleanup() |
249 | { | |
250 | rm -f .old_version | |
251 | rm -f .tmp_System.map | |
252 | rm -f .tmp_kallsyms* | |
253 | rm -f .tmp_version | |
af1f94d0 | 254 | rm -f .tmp_symversions |
1f2bfbd0 | 255 | rm -f .tmp_vmlinux* |
a5967db9 | 256 | rm -f built-in.o |
1f2bfbd0 SR |
257 | rm -f System.map |
258 | rm -f vmlinux | |
259 | rm -f vmlinux.o | |
260 | } | |
261 | ||
ab160dbb SB |
262 | on_exit() |
263 | { | |
264 | if [ $? -ne 0 ]; then | |
265 | cleanup | |
266 | fi | |
267 | } | |
268 | trap on_exit EXIT | |
269 | ||
270 | on_signals() | |
271 | { | |
272 | exit 1 | |
273 | } | |
274 | trap on_signals HUP INT QUIT TERM | |
275 | ||
1f2bfbd0 SR |
276 | # |
277 | # | |
278 | # Use "make V=1" to debug this script | |
279 | case "${KBUILD_VERBOSE}" in | |
280 | *1*) | |
281 | set -x | |
282 | ;; | |
283 | esac | |
284 | ||
285 | if [ "$1" = "clean" ]; then | |
286 | cleanup | |
287 | exit 0 | |
288 | fi | |
289 | ||
290 | # We need access to CONFIG_ symbols | |
423a8155 MM |
291 | case "${KCONFIG_CONFIG}" in |
292 | */*) | |
293 | . "${KCONFIG_CONFIG}" | |
294 | ;; | |
295 | *) | |
296 | # Force using a file from the current directory | |
297 | . "./${KCONFIG_CONFIG}" | |
298 | esac | |
1f2bfbd0 | 299 | |
1f2bfbd0 SR |
300 | # Update version |
301 | info GEN .version | |
302 | if [ ! -r .version ]; then | |
303 | rm -f .version; | |
304 | echo 1 >.version; | |
305 | else | |
306 | mv .version .old_version; | |
307 | expr 0$(cat .old_version) + 1 >.version; | |
308 | fi; | |
309 | ||
310 | # final build of init/ | |
6b90bd4b | 311 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}" |
1f2bfbd0 | 312 | |
abac4c89 NP |
313 | archive_builtin |
314 | ||
315 | #link vmlinux.o | |
abac4c89 NP |
316 | modpost_link vmlinux.o |
317 | ||
318 | # modpost vmlinux.o to check for section mismatches | |
319 | ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o | |
320 | ||
af1f94d0 ST |
321 | if [ -n "${CONFIG_LTO_CLANG}" ]; then |
322 | # Re-use vmlinux.o, so we can avoid the slow LTO link step in | |
323 | # vmlinux_link | |
324 | KBUILD_VMLINUX_INIT= | |
325 | KBUILD_VMLINUX_MAIN=vmlinux.o | |
326 | KBUILD_VMLINUX_LIBS= | |
9abcee51 ST |
327 | |
328 | # Call recordmcount if needed | |
329 | recordmcount vmlinux.o | |
af1f94d0 ST |
330 | fi |
331 | ||
1f2bfbd0 SR |
332 | kallsymso="" |
333 | kallsyms_vmlinux="" | |
334 | if [ -n "${CONFIG_KALLSYMS}" ]; then | |
335 | ||
336 | # kallsyms support | |
337 | # Generate section listing all symbols and add it into vmlinux | |
338 | # It's a three step process: | |
339 | # 1) Link .tmp_vmlinux1 so it has all symbols and sections, | |
340 | # but __kallsyms is empty. | |
341 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
342 | # the right size | |
343 | # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of | |
344 | # the right size, but due to the added section, some | |
345 | # addresses have shifted. | |
346 | # From here, we generate a correct .tmp_kallsyms2.o | |
7e2b37c9 NP |
347 | # 3) That link may have expanded the kernel image enough that |
348 | # more linker branch stubs / trampolines had to be added, which | |
349 | # introduces new names, which further expands kallsyms. Do another | |
350 | # pass if that is the case. In theory it's possible this results | |
351 | # in even more stubs, but unlikely. | |
352 | # KALLSYMS_EXTRA_PASS=1 may also used to debug or work around | |
353 | # other bugs. | |
354 | # 4) The correct ${kallsymso} is linked into the final vmlinux. | |
1f2bfbd0 SR |
355 | # |
356 | # a) Verify that the System.map from vmlinux matches the map from | |
357 | # ${kallsymso}. | |
358 | ||
359 | kallsymso=.tmp_kallsyms2.o | |
360 | kallsyms_vmlinux=.tmp_vmlinux2 | |
361 | ||
362 | # step 1 | |
363 | vmlinux_link "" .tmp_vmlinux1 | |
364 | kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o | |
365 | ||
366 | # step 2 | |
367 | vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2 | |
368 | kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o | |
369 | ||
7e2b37c9 NP |
370 | # step 3 |
371 | size1=$(stat -c "%s" .tmp_kallsyms1.o) | |
372 | size2=$(stat -c "%s" .tmp_kallsyms2.o) | |
373 | ||
374 | if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then | |
1f2bfbd0 SR |
375 | kallsymso=.tmp_kallsyms3.o |
376 | kallsyms_vmlinux=.tmp_vmlinux3 | |
377 | ||
378 | vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3 | |
379 | ||
380 | kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o | |
381 | fi | |
382 | fi | |
383 | ||
384 | info LD vmlinux | |
385 | vmlinux_link "${kallsymso}" vmlinux | |
386 | ||
1347a2ce LT |
387 | if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then |
388 | info SORTEX vmlinux | |
389 | sortextable vmlinux | |
390 | fi | |
391 | ||
1f2bfbd0 SR |
392 | info SYSMAP System.map |
393 | mksysmap vmlinux System.map | |
394 | ||
395 | # step a (see comment above) | |
396 | if [ -n "${CONFIG_KALLSYMS}" ]; then | |
397 | mksysmap ${kallsyms_vmlinux} .tmp_System.map | |
398 | ||
399 | if ! cmp -s System.map .tmp_System.map; then | |
5369f550 | 400 | echo >&2 Inconsistent kallsyms data |
367e43c5 | 401 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
1f2bfbd0 SR |
402 | exit 1 |
403 | fi | |
404 | fi | |
405 | ||
87b8fd13 BK |
406 | if [ -n "${CONFIG_EXYNOS_FMP_FIPS}" ]; then |
407 | echo ' FIPS : Generating hmac of fmp and updating vmlinux... ' | |
408 | PYTHONDONTWRITEBYTECODE=0 "${srctree}/scripts/fmp/fips_fmp_integrity.py" "${objtree}/vmlinux" | |
409 | fi | |
410 | ||
1f2bfbd0 SR |
411 | # We made a new kernel - delete old version file |
412 | rm -f .old_version |