Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 1 | #!/bin/sh |
Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 2 | # SPDX-License-Identifier: GPL-2.0 |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 3 | # |
| 4 | # link vmlinux |
| 5 | # |
Masahiro Yamada | d151e97 | 2019-01-17 09:10:04 +0900 | [diff] [blame] | 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. |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 11 | # |
| 12 | # vmlinux |
| 13 | # ^ |
| 14 | # | |
Masahiro Yamada | d151e97 | 2019-01-17 09:10:04 +0900 | [diff] [blame] | 15 | # +--< $(KBUILD_VMLINUX_OBJS) |
| 16 | # | +--< init/built-in.a drivers/built-in.a mm/built-in.a + more |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 17 | # | |
Nicholas Piggin | 3a166fc | 2017-06-20 01:52:05 +1000 | [diff] [blame] | 18 | # +--< $(KBUILD_VMLINUX_LIBS) |
| 19 | # | +--< lib/lib.a + more |
| 20 | # | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 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 |
| 31 | set -e |
| 32 | |
Masahiro Yamada | 3ec8a5b | 2020-07-02 04:29:36 +0900 | [diff] [blame] | 33 | LD="$1" |
| 34 | KBUILD_LDFLAGS="$2" |
| 35 | LDFLAGS_vmlinux="$3" |
| 36 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 37 | # Nice output in kbuild format |
| 38 | # Will be supressed by "make -s" |
| 39 | info() |
| 40 | { |
| 41 | if [ "${quiet}" != "silent_" ]; then |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 42 | printf " %-7s %s\n" "${1}" "${2}" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 43 | fi |
| 44 | } |
| 45 | |
| 46 | # Link of vmlinux.o used for section mismatch analysis |
| 47 | # ${1} output file |
| 48 | modpost_link() |
| 49 | { |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 50 | local objects |
| 51 | |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 52 | objects="--whole-archive \ |
Masahiro Yamada | d151e97 | 2019-01-17 09:10:04 +0900 | [diff] [blame] | 53 | ${KBUILD_VMLINUX_OBJS} \ |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 54 | --no-whole-archive \ |
| 55 | --start-group \ |
| 56 | ${KBUILD_VMLINUX_LIBS} \ |
| 57 | --end-group" |
| 58 | |
Masahiro Yamada | d503ac5 | 2018-08-24 08:20:39 +0900 | [diff] [blame] | 59 | ${LD} ${KBUILD_LDFLAGS} -r -o ${1} ${objects} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 60 | } |
| 61 | |
Peter Zijlstra | 6804c1a | 2020-03-18 13:33:54 +0100 | [diff] [blame] | 62 | objtool_link() |
| 63 | { |
| 64 | local objtoolopt; |
| 65 | |
| 66 | if [ -n "${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 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 85 | # Link of vmlinux |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 86 | # ${1} - output file |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 87 | # ${2}, ${3}, ... - optional extra .o files |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 88 | vmlinux_link() |
| 89 | { |
| 90 | local lds="${objtree}/${KBUILD_LDS}" |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 91 | local output=${1} |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 92 | local objects |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 93 | local strip_debug |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 94 | |
Linus Torvalds | d7b0827 | 2019-09-20 08:36:47 -0700 | [diff] [blame] | 95 | info LD ${output} |
| 96 | |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 97 | # skip output file argument |
| 98 | shift |
| 99 | |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 100 | # The kallsyms linking does not need debug symbols included. |
| 101 | if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then |
| 102 | strip_debug=-Wl,--strip-debug |
| 103 | fi |
| 104 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 105 | if [ "${SRCARCH}" != "um" ]; then |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 106 | objects="--whole-archive \ |
Masahiro Yamada | d151e97 | 2019-01-17 09:10:04 +0900 | [diff] [blame] | 107 | ${KBUILD_VMLINUX_OBJS} \ |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 108 | --no-whole-archive \ |
| 109 | --start-group \ |
| 110 | ${KBUILD_VMLINUX_LIBS} \ |
| 111 | --end-group \ |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 112 | ${@}" |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 113 | |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 114 | ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} \ |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 115 | ${strip_debug#-Wl,} \ |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 116 | -o ${output} \ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 117 | -T ${lds} ${objects} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 118 | else |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 119 | objects="-Wl,--whole-archive \ |
Masahiro Yamada | d151e97 | 2019-01-17 09:10:04 +0900 | [diff] [blame] | 120 | ${KBUILD_VMLINUX_OBJS} \ |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 121 | -Wl,--no-whole-archive \ |
| 122 | -Wl,--start-group \ |
| 123 | ${KBUILD_VMLINUX_LIBS} \ |
| 124 | -Wl,--end-group \ |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 125 | ${@}" |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 126 | |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 127 | ${CC} ${CFLAGS_vmlinux} \ |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 128 | ${strip_debug} \ |
Andrii Nakryiko | 618916a | 2019-09-05 10:59:38 -0700 | [diff] [blame] | 129 | -o ${output} \ |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 130 | -Wl,-T,${lds} \ |
| 131 | ${objects} \ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 132 | -lutil -lrt -lpthread |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 133 | rm -f linux |
| 134 | fi |
| 135 | } |
| 136 | |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 137 | # generate .BTF typeinfo from DWARF debuginfo |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 138 | # ${1} - vmlinux image |
| 139 | # ${2} - file to dump raw BTF data into |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 140 | gen_btf() |
| 141 | { |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 142 | local pahole_ver |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 143 | |
Andrii Nakryiko | 581b31c | 2019-05-05 17:10:33 -0700 | [diff] [blame] | 144 | if ! [ -x "$(command -v ${PAHOLE})" ]; then |
Chris Down | 2a67a6c | 2020-01-22 00:01:10 +0000 | [diff] [blame] | 145 | echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available" |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 146 | return 1 |
Andrii Nakryiko | 581b31c | 2019-05-05 17:10:33 -0700 | [diff] [blame] | 147 | fi |
| 148 | |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 149 | pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/') |
Lorenz Bauer | 21a85bd | 2020-06-08 10:42:57 +0100 | [diff] [blame] | 150 | if [ "${pahole_ver}" -lt "116" ]; then |
| 151 | echo >&2 "BTF: ${1}: pahole version $(${PAHOLE} --version) is too old, need at least v1.16" |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 152 | return 1 |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 153 | fi |
| 154 | |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 155 | vmlinux_link ${1} |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 156 | |
| 157 | info "BTF" ${2} |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 158 | LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1} |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 159 | |
Fangrui Song | 90ceddc | 2020-03-18 15:27:46 -0700 | [diff] [blame] | 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 |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 170 | } |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 171 | |
| 172 | # Create ${2} .o file with all symbols from the ${1} object file |
| 173 | kallsyms() |
| 174 | { |
| 175 | info KSYM ${2} |
| 176 | local kallsymopt; |
| 177 | |
| 178 | if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then |
James Hogan | 6895f97 | 2012-09-06 22:11:25 +0100 | [diff] [blame] | 179 | kallsymopt="${kallsymopt} --all-symbols" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 180 | fi |
| 181 | |
Ard Biesheuvel | 4d5d566 | 2016-03-15 14:58:12 -0700 | [diff] [blame] | 182 | if [ -n "${CONFIG_KALLSYMS_ABSOLUTE_PERCPU}" ]; then |
Rusty Russell | c6bda7c | 2014-03-17 14:05:46 +1030 | [diff] [blame] | 183 | kallsymopt="${kallsymopt} --absolute-percpu" |
| 184 | fi |
| 185 | |
Ard Biesheuvel | 2213e9a | 2016-03-15 14:58:19 -0700 | [diff] [blame] | 186 | if [ -n "${CONFIG_KALLSYMS_BASE_RELATIVE}" ]; then |
| 187 | kallsymopt="${kallsymopt} --base-relative" |
| 188 | fi |
| 189 | |
Sam Ravnborg | 00e6c28c | 2012-05-08 19:53:46 +0200 | [diff] [blame] | 190 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
| 191 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 192 | |
Ard Biesheuvel | a043934 | 2016-02-05 11:25:05 +0100 | [diff] [blame] | 193 | local afile="`basename ${2} .o`.S" |
| 194 | |
| 195 | ${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${afile} |
| 196 | ${CC} ${aflags} -c -o ${2} ${afile} |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 197 | } |
| 198 | |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 199 | # Perform one step in kallsyms generation, including temporary linking of |
| 200 | # vmlinux. |
| 201 | kallsyms_step() |
| 202 | { |
| 203 | kallsymso_prev=${kallsymso} |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 204 | kallsyms_vmlinux=.tmp_vmlinux.kallsyms${1} |
| 205 | kallsymso=${kallsyms_vmlinux}.o |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 206 | |
Linus Torvalds | d7b0827 | 2019-09-20 08:36:47 -0700 | [diff] [blame] | 207 | vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o} |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 208 | kallsyms ${kallsyms_vmlinux} ${kallsymso} |
| 209 | } |
| 210 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 211 | # Create map file with all symbols from ${1} |
| 212 | # See mksymap for additional details |
| 213 | mksysmap() |
| 214 | { |
| 215 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} |
| 216 | } |
| 217 | |
Shile Zhang | 1091670 | 2019-12-04 08:46:31 +0800 | [diff] [blame] | 218 | sorttable() |
Linus Torvalds | 1347a2ce | 2012-05-28 10:32:28 -0700 | [diff] [blame] | 219 | { |
Shile Zhang | 1091670 | 2019-12-04 08:46:31 +0800 | [diff] [blame] | 220 | ${objtree}/scripts/sorttable ${1} |
Linus Torvalds | 1347a2ce | 2012-05-28 10:32:28 -0700 | [diff] [blame] | 221 | } |
| 222 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 223 | # Delete output files in case of error |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 224 | cleanup() |
| 225 | { |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 226 | rm -f .btf.* |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 227 | rm -f .tmp_System.map |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 228 | rm -f .tmp_vmlinux* |
| 229 | rm -f System.map |
| 230 | rm -f vmlinux |
| 231 | rm -f vmlinux.o |
| 232 | } |
| 233 | |
Sylvain BERTRAND | ab160db | 2015-05-07 00:36:04 +0000 | [diff] [blame] | 234 | on_exit() |
| 235 | { |
| 236 | if [ $? -ne 0 ]; then |
| 237 | cleanup |
| 238 | fi |
| 239 | } |
| 240 | trap on_exit EXIT |
| 241 | |
| 242 | on_signals() |
| 243 | { |
| 244 | exit 1 |
| 245 | } |
| 246 | trap on_signals HUP INT QUIT TERM |
| 247 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 248 | # Use "make V=1" to debug this script |
| 249 | case "${KBUILD_VERBOSE}" in |
| 250 | *1*) |
| 251 | set -x |
| 252 | ;; |
| 253 | esac |
| 254 | |
| 255 | if [ "$1" = "clean" ]; then |
| 256 | cleanup |
| 257 | exit 0 |
| 258 | fi |
| 259 | |
| 260 | # We need access to CONFIG_ symbols |
Masahiro Yamada | 94cf8ac | 2019-03-08 14:49:10 +0900 | [diff] [blame] | 261 | . include/config/auto.conf |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 262 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 263 | # Update version |
| 264 | info GEN .version |
Masahiro Yamada | 278ae60 | 2017-09-22 14:31:13 +0900 | [diff] [blame] | 265 | if [ -r .version ]; then |
| 266 | VERSION=$(expr 0$(cat .version) + 1) |
| 267 | echo $VERSION > .version |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 268 | else |
Masahiro Yamada | 278ae60 | 2017-09-22 14:31:13 +0900 | [diff] [blame] | 269 | rm -f .version |
| 270 | echo 1 > .version |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 271 | fi; |
| 272 | |
| 273 | # final build of init/ |
Masahiro Yamada | 083bc0e | 2020-02-11 05:06:34 +0900 | [diff] [blame] | 274 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1 |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 275 | |
Nicholas Piggin | abac4c8 | 2016-11-24 03:41:43 +1100 | [diff] [blame] | 276 | #link vmlinux.o |
| 277 | info LD vmlinux.o |
| 278 | modpost_link vmlinux.o |
Peter Zijlstra | 6804c1a | 2020-03-18 13:33:54 +0100 | [diff] [blame] | 279 | objtool_link vmlinux.o |
Nicholas Piggin | abac4c8 | 2016-11-24 03:41:43 +1100 | [diff] [blame] | 280 | |
| 281 | # modpost vmlinux.o to check for section mismatches |
Masahiro Yamada | a721588 | 2019-07-31 00:59:02 +0900 | [diff] [blame] | 282 | ${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1 |
Nicholas Piggin | abac4c8 | 2016-11-24 03:41:43 +1100 | [diff] [blame] | 283 | |
Alexey Gladkov | 898490c | 2019-04-29 18:11:14 +0200 | [diff] [blame] | 284 | info MODINFO modules.builtin.modinfo |
| 285 | ${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo |
Masahiro Yamada | 8b41fc4 | 2019-12-19 17:33:29 +0900 | [diff] [blame] | 286 | info GEN modules.builtin |
| 287 | # The second line aids cases where multiple modules share the same object. |
| 288 | tr '\0' '\n' < modules.builtin.modinfo | sed -n 's/^[[:alnum:]:_]*\.file=//p' | |
| 289 | tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$/.ko/' > modules.builtin |
Alexey Gladkov | 898490c | 2019-04-29 18:11:14 +0200 | [diff] [blame] | 290 | |
Andrii Nakryiko | 7fd7856 | 2019-08-13 11:54:42 -0700 | [diff] [blame] | 291 | btf_vmlinux_bin_o="" |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 292 | if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then |
Kees Cook | af73d78 | 2020-03-03 18:18:34 -0800 | [diff] [blame] | 293 | btf_vmlinux_bin_o=.btf.vmlinux.bin.o |
| 294 | if ! gen_btf .tmp_vmlinux.btf $btf_vmlinux_bin_o ; then |
Stanislav Fomichev | da5fb18 | 2019-11-27 08:14:10 -0800 | [diff] [blame] | 295 | echo >&2 "Failed to generate BTF for vmlinux" |
| 296 | echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF" |
| 297 | exit 1 |
Andrii Nakryiko | 341dfcf | 2019-08-12 11:39:47 -0700 | [diff] [blame] | 298 | fi |
| 299 | fi |
| 300 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 301 | kallsymso="" |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 302 | kallsymso_prev="" |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 303 | kallsyms_vmlinux="" |
| 304 | if [ -n "${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 |
Nicholas Piggin | 7e2b37c | 2016-11-24 03:41:37 +1100 | [diff] [blame] | 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. |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 325 | # |
| 326 | # a) Verify that the System.map from vmlinux matches the map from |
| 327 | # ${kallsymso}. |
| 328 | |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 329 | kallsyms_step 1 |
| 330 | kallsyms_step 2 |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 331 | |
Nicholas Piggin | 7e2b37c | 2016-11-24 03:41:37 +1100 | [diff] [blame] | 332 | # step 3 |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 333 | size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso_prev}) |
| 334 | size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso}) |
Nicholas Piggin | 7e2b37c | 2016-11-24 03:41:37 +1100 | [diff] [blame] | 335 | |
| 336 | if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then |
Kees Cook | 8959e39 | 2019-08-13 08:15:32 -0700 | [diff] [blame] | 337 | kallsyms_step 3 |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 338 | fi |
| 339 | fi |
| 340 | |
Linus Torvalds | d7b0827 | 2019-09-20 08:36:47 -0700 | [diff] [blame] | 341 | vmlinux_link vmlinux "${kallsymso}" ${btf_vmlinux_bin_o} |
Andrii Nakryiko | e83b9f5 | 2019-04-02 09:49:50 -0700 | [diff] [blame] | 342 | |
Jiri Olsa | c9a0f3b | 2020-07-11 23:53:24 +0200 | [diff] [blame] | 343 | # fill in BTF IDs |
| 344 | if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then |
| 345 | info BTFIDS vmlinux |
| 346 | ${RESOLVE_BTFIDS} vmlinux |
| 347 | fi |
| 348 | |
Shile Zhang | 1091670 | 2019-12-04 08:46:31 +0800 | [diff] [blame] | 349 | if [ -n "${CONFIG_BUILDTIME_TABLE_SORT}" ]; then |
| 350 | info SORTTAB vmlinux |
Shile Zhang | f14bf6a | 2019-12-04 08:46:33 +0800 | [diff] [blame] | 351 | if ! sorttable vmlinux; then |
| 352 | echo >&2 Failed to sort kernel tables |
| 353 | exit 1 |
| 354 | fi |
Linus Torvalds | 1347a2ce | 2012-05-28 10:32:28 -0700 | [diff] [blame] | 355 | fi |
| 356 | |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 357 | info SYSMAP System.map |
| 358 | mksysmap vmlinux System.map |
| 359 | |
| 360 | # step a (see comment above) |
| 361 | if [ -n "${CONFIG_KALLSYMS}" ]; then |
| 362 | mksysmap ${kallsyms_vmlinux} .tmp_System.map |
| 363 | |
| 364 | if ! cmp -s System.map .tmp_System.map; then |
Michal Marek | 5369f55 | 2012-07-07 23:04:40 +0200 | [diff] [blame] | 365 | echo >&2 Inconsistent kallsyms data |
Michal Marek | 367e43c | 2012-08-10 11:55:11 +0200 | [diff] [blame] | 366 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
Sam Ravnborg | 1f2bfbd | 2012-05-05 10:18:41 +0200 | [diff] [blame] | 367 | exit 1 |
| 368 | fi |
| 369 | fi |