Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | # |
| 3 | # link vmlinux |
| 4 | # |
| 5 | # vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_INIT) and |
| 6 | # $(KBUILD_VMLINUX_MAIN). Most are built-in.o files from top-level directories |
| 7 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. |
| 8 | # Ordering when linking is important, and $(KBUILD_VMLINUX_INIT) must be first. |
| 9 | # |
| 10 | # vmlinux |
| 11 | # ^ |
| 12 | # | |
| 13 | # +-< $(KBUILD_VMLINUX_INIT) |
| 14 | # | +--< init/version.o + more |
| 15 | # | |
| 16 | # +--< $(KBUILD_VMLINUX_MAIN) |
| 17 | # | +--< drivers/built-in.o mm/built-in.o + more |
| 18 | # | |
| 19 | # +-< ${kallsymso} (see description in KALLSYMS section) |
| 20 | # |
| 21 | # vmlinux version (uname -v) cannot be updated during normal |
| 22 | # descending-into-subdirs phase since we do not yet know if we need to |
| 23 | # update vmlinux. |
| 24 | # Therefore this step is delayed until just before final link of vmlinux. |
| 25 | # |
| 26 | # System.map is generated to document addresses of all kernel symbols |
| 27 | |
| 28 | # Error out on error |
| 29 | set -e |
| 30 | |
| 31 | # Nice output in kbuild format |
| 32 | # Will be supressed by "make -s" |
| 33 | info() |
| 34 | { |
| 35 | if [ "${quiet}" != "silent_" ]; then |
| 36 | printf " %-7s %s\n" ${1} ${2} |
| 37 | fi |
| 38 | } |
| 39 | |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 40 | # Thin archive build here makes a final archive with |
| 41 | # symbol table and indexes from vmlinux objects, which can be |
| 42 | # used as input to linker. |
| 43 | # |
| 44 | # Traditional incremental style of link does not require this step |
| 45 | # |
| 46 | # built-in.o output file |
| 47 | # |
| 48 | archive_builtin() |
| 49 | { |
| 50 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then |
| 51 | info AR built-in.o |
| 52 | rm -f built-in.o; |
| 53 | ${AR} rcsT${KBUILD_ARFLAGS} built-in.o \ |
| 54 | ${KBUILD_VMLINUX_INIT} \ |
| 55 | ${KBUILD_VMLINUX_MAIN} |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 56 | |
| 57 | if [ -n "${CONFIG_LTO_CLANG}" ]; then |
| 58 | mv -f built-in.o built-in.o.tmp |
| 59 | ${LLVM_AR} rcsT${KBUILD_ARFLAGS} built-in.o $(${AR} t built-in.o.tmp) |
| 60 | rm -f built-in.o.tmp |
| 61 | fi |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 62 | fi |
| 63 | } |
| 64 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 65 | # If CONFIG_LTO_CLANG is selected, collect generated symbol versions into |
| 66 | # .tmp_symversions |
| 67 | modversions() |
| 68 | { |
| 69 | if [ -z "${CONFIG_LTO_CLANG}" ]; then |
| 70 | return |
| 71 | fi |
| 72 | |
| 73 | if [ -z "${CONFIG_MODVERSIONS}" ]; then |
| 74 | return |
| 75 | fi |
| 76 | |
| 77 | rm -f .tmp_symversions |
| 78 | |
| 79 | for a in built-in.o ${KBUILD_VMLINUX_LIBS}; do |
| 80 | for o in $(${AR} t $a); do |
| 81 | if [ -f ${o}.symversions ]; then |
| 82 | cat ${o}.symversions >> .tmp_symversions |
| 83 | fi |
| 84 | done |
| 85 | done |
| 86 | |
| 87 | echo "-T .tmp_symversions" |
| 88 | } |
| 89 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 90 | # Link of vmlinux.o used for section mismatch analysis |
| 91 | # ${1} output file |
| 92 | modpost_link() |
| 93 | { |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 94 | local objects |
| 95 | |
| 96 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then |
| 97 | objects="--whole-archive built-in.o" |
| 98 | else |
| 99 | objects="${KBUILD_VMLINUX_INIT} \ |
| 100 | --start-group \ |
| 101 | ${KBUILD_VMLINUX_MAIN} \ |
| 102 | --end-group" |
| 103 | fi |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 104 | |
| 105 | if [ -n "${CONFIG_LTO_CLANG}" ]; then |
| 106 | # This might take a while, so indicate that we're doing |
| 107 | # an LTO link |
| 108 | info LTO vmlinux.o |
| 109 | else |
| 110 | info LD vmlinux.o |
| 111 | fi |
| 112 | |
| 113 | ${LD} ${LDFLAGS} -r -o ${1} $(modversions) ${objects} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | # Link of vmlinux |
| 117 | # ${1} - optional extra .o files |
| 118 | # ${2} - output file |
| 119 | vmlinux_link() |
| 120 | { |
| 121 | local lds="${objtree}/${KBUILD_LDS}" |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 122 | local objects |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 123 | |
| 124 | if [ "${SRCARCH}" != "um" ]; then |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 125 | local ld=${LD} |
| 126 | local ldflags="${LDFLAGS} ${LDFLAGS_vmlinux}" |
| 127 | |
| 128 | if [ -n "${LDFINAL_vmlinux}" ]; then |
| 129 | ld=${LDFINAL_vmlinux} |
| 130 | ldflags="${LDFLAGS_FINAL_vmlinux} ${LDFLAGS_vmlinux}" |
| 131 | fi |
| 132 | |
| 133 | if [[ -n "${CONFIG_THIN_ARCHIVES}" && -z "${CONFIG_LTO_CLANG}" ]]; then |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 134 | objects="--whole-archive built-in.o ${1}" |
| 135 | else |
| 136 | objects="${KBUILD_VMLINUX_INIT} \ |
| 137 | --start-group \ |
| 138 | ${KBUILD_VMLINUX_MAIN} \ |
| 139 | --end-group \ |
| 140 | ${1}" |
| 141 | fi |
| 142 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 143 | ${ld} ${ldflags} -o ${2} -T ${lds} ${objects} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 144 | else |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 145 | if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then |
| 146 | objects="-Wl,--whole-archive built-in.o ${1}" |
| 147 | else |
| 148 | objects="${KBUILD_VMLINUX_INIT} \ |
| 149 | -Wl,--start-group \ |
| 150 | ${KBUILD_VMLINUX_MAIN} \ |
| 151 | -Wl,--end-group \ |
| 152 | ${1}" |
| 153 | fi |
| 154 | |
| 155 | ${CC} ${CFLAGS_vmlinux} -o ${2} \ |
| 156 | -Wl,-T,${lds} \ |
| 157 | ${objects} \ |
| 158 | -lutil -lrt -lpthread |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 159 | rm -f linux |
| 160 | fi |
| 161 | } |
| 162 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 163 | # Create ${2} .o file with all symbols from the ${1} object file |
| 164 | kallsyms() |
| 165 | { |
| 166 | info KSYM ${2} |
| 167 | local kallsymopt; |
| 168 | |
Rusty Russell | b92021b | 2013-03-15 15:04:17 +1030 | [diff] [blame] | 169 | if [ -n "${CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX}" ]; then |
| 170 | kallsymopt="${kallsymopt} --symbol-prefix=_" |
James Hogan | 6895f97 | 2012-09-06 22:11:25 +0100 | [diff] [blame] | 171 | fi |
| 172 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 173 | if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then |
James Hogan | 6895f97 | 2012-09-06 22:11:25 +0100 | [diff] [blame] | 174 | kallsymopt="${kallsymopt} --all-symbols" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 175 | fi |
| 176 | |
Ard Biesheuvel | 4d5d566 | 2016-03-15 14:58:12 -0700 | [diff] [blame] | 177 | if [ -n "${CONFIG_KALLSYMS_ABSOLUTE_PERCPU}" ]; then |
Rusty Russell | c6bda7c | 2014-03-17 14:05:46 +1030 | [diff] [blame] | 178 | kallsymopt="${kallsymopt} --absolute-percpu" |
| 179 | fi |
| 180 | |
Ard Biesheuvel | 2213e9a | 2016-03-15 14:58:19 -0700 | [diff] [blame] | 181 | if [ -n "${CONFIG_KALLSYMS_BASE_RELATIVE}" ]; then |
| 182 | kallsymopt="${kallsymopt} --base-relative" |
| 183 | fi |
| 184 | |
Sam Ravnborg | 00e6c28c | 2012-05-08 19:53:46 +0200 | [diff] [blame] | 185 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
| 186 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 187 | |
Ard Biesheuvel | a043934 | 2016-02-05 11:25:05 +0100 | [diff] [blame] | 188 | local afile="`basename ${2} .o`.S" |
| 189 | |
| 190 | ${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${afile} |
| 191 | ${CC} ${aflags} -c -o ${2} ${afile} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | # Create map file with all symbols from ${1} |
| 195 | # See mksymap for additional details |
| 196 | mksysmap() |
| 197 | { |
| 198 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} |
| 199 | } |
| 200 | |
Linus Torvalds | 1347a2ce | 2012-05-28 10:32:28 -0700 | [diff] [blame] | 201 | sortextable() |
| 202 | { |
| 203 | ${objtree}/scripts/sortextable ${1} |
| 204 | } |
| 205 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 206 | # Delete output files in case of error |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 207 | cleanup() |
| 208 | { |
| 209 | rm -f .old_version |
| 210 | rm -f .tmp_System.map |
| 211 | rm -f .tmp_kallsyms* |
| 212 | rm -f .tmp_version |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 213 | rm -f .tmp_symversions |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 214 | rm -f .tmp_vmlinux* |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 215 | rm -f built-in.o |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 216 | rm -f System.map |
| 217 | rm -f vmlinux |
| 218 | rm -f vmlinux.o |
| 219 | } |
| 220 | |
Sylvain BERTRAND | ab160db | 2015-05-07 00:36:04 +0000 | [diff] [blame] | 221 | on_exit() |
| 222 | { |
| 223 | if [ $? -ne 0 ]; then |
| 224 | cleanup |
| 225 | fi |
| 226 | } |
| 227 | trap on_exit EXIT |
| 228 | |
| 229 | on_signals() |
| 230 | { |
| 231 | exit 1 |
| 232 | } |
| 233 | trap on_signals HUP INT QUIT TERM |
| 234 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 235 | # |
| 236 | # |
| 237 | # Use "make V=1" to debug this script |
| 238 | case "${KBUILD_VERBOSE}" in |
| 239 | *1*) |
| 240 | set -x |
| 241 | ;; |
| 242 | esac |
| 243 | |
| 244 | if [ "$1" = "clean" ]; then |
| 245 | cleanup |
| 246 | exit 0 |
| 247 | fi |
| 248 | |
| 249 | # We need access to CONFIG_ symbols |
Michal Marek | 423a815 | 2013-02-25 13:47:53 +0100 | [diff] [blame] | 250 | case "${KCONFIG_CONFIG}" in |
| 251 | */*) |
| 252 | . "${KCONFIG_CONFIG}" |
| 253 | ;; |
| 254 | *) |
| 255 | # Force using a file from the current directory |
| 256 | . "./${KCONFIG_CONFIG}" |
| 257 | esac |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 258 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 259 | # Update version |
| 260 | info GEN .version |
| 261 | if [ ! -r .version ]; then |
| 262 | rm -f .version; |
| 263 | echo 1 >.version; |
| 264 | else |
| 265 | mv .version .old_version; |
| 266 | expr 0$(cat .old_version) + 1 >.version; |
| 267 | fi; |
| 268 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 269 | archive_builtin |
| 270 | |
| 271 | #link vmlinux.o |
| 272 | modpost_link vmlinux.o |
| 273 | |
| 274 | # modpost vmlinux.o to check for section mismatches |
| 275 | ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o |
| 276 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 277 | # final build of init/ |
Emese Revfy | 6b90bd4 | 2016-05-24 00:09:38 +0200 | [diff] [blame] | 278 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 279 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame^] | 280 | if [ -n "${CONFIG_LTO_CLANG}" ]; then |
| 281 | # Re-use vmlinux.o, so we can avoid the slow LTO link step in |
| 282 | # vmlinux_link |
| 283 | KBUILD_VMLINUX_INIT= |
| 284 | KBUILD_VMLINUX_MAIN=vmlinux.o |
| 285 | fi |
| 286 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 287 | kallsymso="" |
| 288 | kallsyms_vmlinux="" |
| 289 | if [ -n "${CONFIG_KALLSYMS}" ]; then |
| 290 | |
| 291 | # kallsyms support |
| 292 | # Generate section listing all symbols and add it into vmlinux |
| 293 | # It's a three step process: |
| 294 | # 1) Link .tmp_vmlinux1 so it has all symbols and sections, |
| 295 | # but __kallsyms is empty. |
| 296 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
| 297 | # the right size |
| 298 | # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of |
| 299 | # the right size, but due to the added section, some |
| 300 | # addresses have shifted. |
| 301 | # From here, we generate a correct .tmp_kallsyms2.o |
| 302 | # 2a) We may use an extra pass as this has been necessary to |
| 303 | # woraround some alignment related bugs. |
| 304 | # KALLSYMS_EXTRA_PASS=1 is used to trigger this. |
| 305 | # 3) The correct ${kallsymso} is linked into the final vmlinux. |
| 306 | # |
| 307 | # a) Verify that the System.map from vmlinux matches the map from |
| 308 | # ${kallsymso}. |
| 309 | |
| 310 | kallsymso=.tmp_kallsyms2.o |
| 311 | kallsyms_vmlinux=.tmp_vmlinux2 |
| 312 | |
| 313 | # step 1 |
| 314 | vmlinux_link "" .tmp_vmlinux1 |
| 315 | kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o |
| 316 | |
| 317 | # step 2 |
| 318 | vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2 |
| 319 | kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o |
| 320 | |
| 321 | # step 2a |
| 322 | if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then |
| 323 | kallsymso=.tmp_kallsyms3.o |
| 324 | kallsyms_vmlinux=.tmp_vmlinux3 |
| 325 | |
| 326 | vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3 |
| 327 | |
| 328 | kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o |
| 329 | fi |
| 330 | fi |
| 331 | |
| 332 | info LD vmlinux |
| 333 | vmlinux_link "${kallsymso}" vmlinux |
| 334 | |
Linus Torvalds | 1347a2ce | 2012-05-28 10:32:28 -0700 | [diff] [blame] | 335 | if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then |
| 336 | info SORTEX vmlinux |
| 337 | sortextable vmlinux |
| 338 | fi |
| 339 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 340 | info SYSMAP System.map |
| 341 | mksysmap vmlinux System.map |
| 342 | |
| 343 | # step a (see comment above) |
| 344 | if [ -n "${CONFIG_KALLSYMS}" ]; then |
| 345 | mksysmap ${kallsyms_vmlinux} .tmp_System.map |
| 346 | |
| 347 | if ! cmp -s System.map .tmp_System.map; then |
Michal Marek | 5369f55 | 2012-07-07 23:04:40 +0200 | [diff] [blame] | 348 | echo >&2 Inconsistent kallsyms data |
Michal Marek | 367e43c | 2012-08-10 11:55:11 +0200 | [diff] [blame] | 349 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 350 | exit 1 |
| 351 | fi |
| 352 | fi |
| 353 | |
| 354 | # We made a new kernel - delete old version file |
| 355 | rm -f .old_version |