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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# +-< ${kallsymso} (see description in KALLSYMS section)
20#
21# vmlinux version (uname -v) cannot be updated during normal
22# descending-into-subdirs phase since we do not yet know if we need to
23# update vmlinux.
24# Therefore this step is delayed until just before final link of vmlinux.
25#
26# System.map is generated to document addresses of all kernel symbols
27
28# Error out on error
29set -e
30
31# Nice output in kbuild format
32# Will be supressed by "make -s"
33info()
34{
35 if [ "${quiet}" != "silent_" ]; then
36 printf " %-7s %s\n" ${1} ${2}
37 fi
38}
39
40# Link of vmlinux.o used for section mismatch analysis
41# ${1} output file
42modpost_link()
43{
44 ${LD} ${LDFLAGS} -r -o ${1} ${KBUILD_VMLINUX_INIT} \
45 --start-group ${KBUILD_VMLINUX_MAIN} --end-group
46}
47
48# Link of vmlinux
49# ${1} - optional extra .o files
50# ${2} - output file
51vmlinux_link()
52{
53 local lds="${objtree}/${KBUILD_LDS}"
54
55 if [ "${SRCARCH}" != "um" ]; then
56 ${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2} \
57 -T ${lds} ${KBUILD_VMLINUX_INIT} \
58 --start-group ${KBUILD_VMLINUX_MAIN} --end-group ${1}
59 else
60 ${CC} ${CFLAGS_vmlinux} -o ${2} \
61 -Wl,-T,${lds} ${KBUILD_VMLINUX_INIT} \
62 -Wl,--start-group \
63 ${KBUILD_VMLINUX_MAIN} \
64 -Wl,--end-group \
65 -lutil ${1}
66 rm -f linux
67 fi
68}
69
70
71# Create ${2} .o file with all symbols from the ${1} object file
72kallsyms()
73{
74 info KSYM ${2}
75 local kallsymopt;
76
77 if [ -n "${CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX}" ]; then
78 kallsymopt="${kallsymopt} --symbol-prefix=_"
79 fi
80
81 if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then
82 kallsymopt="${kallsymopt} --all-symbols"
83 fi
84
85 if [ -n "${CONFIG_ARM}" ] && [ -n "${CONFIG_PAGE_OFFSET}" ]; then
86 kallsymopt="${kallsymopt} --page-offset=$CONFIG_PAGE_OFFSET"
87 fi
88
89 if [ -n "${CONFIG_X86_64}" ]; then
90 kallsymopt="${kallsymopt} --absolute-percpu"
91 fi
92
93 local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \
94 ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
95
96 ${NM} -n ${1} | \
97 scripts/kallsyms ${kallsymopt} | \
98 ${CC} ${aflags} -c -o ${2} -x assembler-with-cpp -
99}
100
101# Create map file with all symbols from ${1}
102# See mksymap for additional details
103mksysmap()
104{
105 ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2}
106}
107
108sortextable()
109{
110 ${objtree}/scripts/sortextable ${1}
111}
112
113# Delete output files in case of error
114trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR
115cleanup()
116{
117 rm -f .old_version
118 rm -f .tmp_System.map
119 rm -f .tmp_kallsyms*
120 rm -f .tmp_version
121 rm -f .tmp_vmlinux*
122 rm -f System.map
123 rm -f vmlinux
124 rm -f vmlinux.o
125}
126
127#
128#
129# Use "make V=1" to debug this script
130case "${KBUILD_VERBOSE}" in
131*1*)
132 set -x
133 ;;
134esac
135
136if [ "$1" = "clean" ]; then
137 cleanup
138 exit 0
139fi
140
141# We need access to CONFIG_ symbols
142case "${KCONFIG_CONFIG}" in
143*/*)
144 . "${KCONFIG_CONFIG}"
145 ;;
146*)
147 # Force using a file from the current directory
148 . "./${KCONFIG_CONFIG}"
149esac
150
151#link vmlinux.o
152info LD vmlinux.o
153modpost_link vmlinux.o
154
155# modpost vmlinux.o to check for section mismatches
156${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
157
158# Update version
159info GEN .version
160if [ ! -r .version ]; then
161 rm -f .version;
162 echo 1 >.version;
163else
164 mv .version .old_version;
165 expr 0$(cat .old_version) + 1 >.version;
166fi;
167
168# final build of init/
169${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init
170
171kallsymso=""
172kallsyms_vmlinux=""
173if [ -n "${CONFIG_KALLSYMS}" ]; then
174
175 # kallsyms support
176 # Generate section listing all symbols and add it into vmlinux
177 # It's a three step process:
178 # 1) Link .tmp_vmlinux1 so it has all symbols and sections,
179 # but __kallsyms is empty.
180 # Running kallsyms on that gives us .tmp_kallsyms1.o with
181 # the right size
182 # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of
183 # the right size, but due to the added section, some
184 # addresses have shifted.
185 # From here, we generate a correct .tmp_kallsyms2.o
186 # 2a) We may use an extra pass as this has been necessary to
187 # woraround some alignment related bugs.
188 # KALLSYMS_EXTRA_PASS=1 is used to trigger this.
189 # 3) The correct ${kallsymso} is linked into the final vmlinux.
190 #
191 # a) Verify that the System.map from vmlinux matches the map from
192 # ${kallsymso}.
193
194 kallsymso=.tmp_kallsyms2.o
195 kallsyms_vmlinux=.tmp_vmlinux2
196
197 # step 1
198 vmlinux_link "" .tmp_vmlinux1
199 kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
200
201 # step 2
202 vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
203 kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
204
205 # step 2a
206 if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
207 kallsymso=.tmp_kallsyms3.o
208 kallsyms_vmlinux=.tmp_vmlinux3
209
210 vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3
211
212 kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
213 fi
214fi
215
216info LD vmlinux
217vmlinux_link "${kallsymso}" vmlinux
218
219if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
220 info SORTEX vmlinux
221 sortextable vmlinux
222fi
223
224info SYSMAP System.map
225mksysmap vmlinux System.map
226
227# step a (see comment above)
228if [ -n "${CONFIG_KALLSYMS}" ]; then
229 mksysmap ${kallsyms_vmlinux} .tmp_System.map
230
231 if ! cmp -s System.map .tmp_System.map; then
232 echo >&2 Inconsistent kallsyms data
233 echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround
234 cleanup
235 exit 1
236 fi
237fi
238
239# We made a new kernel - delete old version file
240rm -f .old_version
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# +-< ${kallsymso} (see description in KALLSYMS section)
20#
21# vmlinux version (uname -v) cannot be updated during normal
22# descending-into-subdirs phase since we do not yet know if we need to
23# update vmlinux.
24# Therefore this step is delayed until just before final link of vmlinux.
25#
26# System.map is generated to document addresses of all kernel symbols
27
28# Error out on error
29set -e
30
31# Nice output in kbuild format
32# Will be supressed by "make -s"
33info()
34{
35 if [ "${quiet}" != "silent_" ]; then
36 printf " %-7s %s\n" ${1} ${2}
37 fi
38}
39
40# Link of vmlinux.o used for section mismatch analysis
41# ${1} output file
42modpost_link()
43{
44 ${LD} ${LDFLAGS} -r -o ${1} ${KBUILD_VMLINUX_INIT} \
45 --start-group ${KBUILD_VMLINUX_MAIN} --end-group
46}
47
48# Link of vmlinux
49# ${1} - optional extra .o files
50# ${2} - output file
51vmlinux_link()
52{
53 local lds="${objtree}/${KBUILD_LDS}"
54
55 if [ "${SRCARCH}" != "um" ]; then
56 ${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2} \
57 -T ${lds} ${KBUILD_VMLINUX_INIT} \
58 --start-group ${KBUILD_VMLINUX_MAIN} --end-group ${1}
59 else
60 ${CC} ${CFLAGS_vmlinux} -o ${2} \
61 -Wl,-T,${lds} ${KBUILD_VMLINUX_INIT} \
62 -Wl,--start-group \
63 ${KBUILD_VMLINUX_MAIN} \
64 -Wl,--end-group \
65 -lutil ${1}
66 rm -f linux
67 fi
68}
69
70
71# Create ${2} .o file with all symbols from the ${1} object file
72kallsyms()
73{
74 info KSYM ${2}
75 local kallsymopt;
76
77 if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then
78 kallsymopt=--all-symbols
79 fi
80
81 local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \
82 ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
83
84 ${NM} -n ${1} | \
85 scripts/kallsyms ${kallsymopt} | \
86 ${CC} ${aflags} -c -o ${2} -x assembler-with-cpp -
87}
88
89# Create map file with all symbols from ${1}
90# See mksymap for additional details
91mksysmap()
92{
93 ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2}
94}
95
96sortextable()
97{
98 ${objtree}/scripts/sortextable ${1}
99}
100
101# Delete output files in case of error
102trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR
103cleanup()
104{
105 rm -f .old_version
106 rm -f .tmp_System.map
107 rm -f .tmp_kallsyms*
108 rm -f .tmp_version
109 rm -f .tmp_vmlinux*
110 rm -f System.map
111 rm -f vmlinux
112 rm -f vmlinux.o
113}
114
115#
116#
117# Use "make V=1" to debug this script
118case "${KBUILD_VERBOSE}" in
119*1*)
120 set -x
121 ;;
122esac
123
124if [ "$1" = "clean" ]; then
125 cleanup
126 exit 0
127fi
128
129# We need access to CONFIG_ symbols
130. ./.config
131
132#link vmlinux.o
133info LD vmlinux.o
134modpost_link vmlinux.o
135
136# modpost vmlinux.o to check for section mismatches
137${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
138
139# Update version
140info GEN .version
141if [ ! -r .version ]; then
142 rm -f .version;
143 echo 1 >.version;
144else
145 mv .version .old_version;
146 expr 0$(cat .old_version) + 1 >.version;
147fi;
148
149# final build of init/
150${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init
151
152kallsymso=""
153kallsyms_vmlinux=""
154if [ -n "${CONFIG_KALLSYMS}" ]; then
155
156 # kallsyms support
157 # Generate section listing all symbols and add it into vmlinux
158 # It's a three step process:
159 # 1) Link .tmp_vmlinux1 so it has all symbols and sections,
160 # but __kallsyms is empty.
161 # Running kallsyms on that gives us .tmp_kallsyms1.o with
162 # the right size
163 # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of
164 # the right size, but due to the added section, some
165 # addresses have shifted.
166 # From here, we generate a correct .tmp_kallsyms2.o
167 # 2a) We may use an extra pass as this has been necessary to
168 # woraround some alignment related bugs.
169 # KALLSYMS_EXTRA_PASS=1 is used to trigger this.
170 # 3) The correct ${kallsymso} is linked into the final vmlinux.
171 #
172 # a) Verify that the System.map from vmlinux matches the map from
173 # ${kallsymso}.
174
175 kallsymso=.tmp_kallsyms2.o
176 kallsyms_vmlinux=.tmp_vmlinux2
177
178 # step 1
179 vmlinux_link "" .tmp_vmlinux1
180 kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
181
182 # step 2
183 vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
184 kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
185
186 # step 2a
187 if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
188 kallsymso=.tmp_kallsyms3.o
189 kallsyms_vmlinux=.tmp_vmlinux3
190
191 vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3
192
193 kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
194 fi
195fi
196
197info LD vmlinux
198vmlinux_link "${kallsymso}" vmlinux
199
200if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
201 info SORTEX vmlinux
202 sortextable vmlinux
203fi
204
205info SYSMAP System.map
206mksysmap vmlinux System.map
207
208# step a (see comment above)
209if [ -n "${CONFIG_KALLSYMS}" ]; then
210 mksysmap ${kallsyms_vmlinux} .tmp_System.map
211
212 if ! cmp -s System.map .tmp_System.map; then
213 echo Inconsistent kallsyms data
214 echo echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround
215 cleanup
216 exit 1
217 fi
218fi
219
220# We made a new kernel - delete old version file
221rm -f .old_version