Commit | Line | Data |
---|---|---|
1f2bfbd0 SR |
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 | ||
40 | # Link of vmlinux.o used for section mismatch analysis | |
41 | # ${1} output file | |
42 | modpost_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 | # ${2} - output file | |
51 | vmlinux_link() | |
52 | { | |
53 | local lds="${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 \ | |
a7df4716 | 65 | -lutil -lrt -lpthread ${1} |
1f2bfbd0 SR |
66 | rm -f linux |
67 | fi | |
68 | } | |
69 | ||
70 | ||
71 | # Create ${2} .o file with all symbols from the ${1} object file | |
72 | kallsyms() | |
73 | { | |
74 | info KSYM ${2} | |
75 | local kallsymopt; | |
76 | ||
b92021b0 RR |
77 | if [ -n "${CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX}" ]; then |
78 | kallsymopt="${kallsymopt} --symbol-prefix=_" | |
6895f97e JH |
79 | fi |
80 | ||
1f2bfbd0 | 81 | if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then |
6895f97e | 82 | kallsymopt="${kallsymopt} --all-symbols" |
1f2bfbd0 SR |
83 | fi |
84 | ||
cc847530 | 85 | if [ -n "${CONFIG_ARM}" ] && [ -z "${CONFIG_XIP_KERNEL}" ] && [ -n "${CONFIG_PAGE_OFFSET}" ]; then |
7122c3e9 ML |
86 | kallsymopt="${kallsymopt} --page-offset=$CONFIG_PAGE_OFFSET" |
87 | fi | |
f6537f2f | 88 | |
4d5d5664 | 89 | if [ -n "${CONFIG_KALLSYMS_ABSOLUTE_PERCPU}" ]; then |
c6bda7c9 RR |
90 | kallsymopt="${kallsymopt} --absolute-percpu" |
91 | fi | |
92 | ||
2213e9a6 AB |
93 | if [ -n "${CONFIG_KALLSYMS_BASE_RELATIVE}" ]; then |
94 | kallsymopt="${kallsymopt} --base-relative" | |
95 | fi | |
96 | ||
00e6c28c SR |
97 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
98 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" | |
1f2bfbd0 SR |
99 | |
100 | ${NM} -n ${1} | \ | |
101 | scripts/kallsyms ${kallsymopt} | \ | |
102 | ${CC} ${aflags} -c -o ${2} -x assembler-with-cpp - | |
103 | } | |
104 | ||
105 | # Create map file with all symbols from ${1} | |
106 | # See mksymap for additional details | |
107 | mksysmap() | |
108 | { | |
109 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} | |
110 | } | |
111 | ||
1347a2ce LT |
112 | sortextable() |
113 | { | |
114 | ${objtree}/scripts/sortextable ${1} | |
115 | } | |
116 | ||
1f2bfbd0 | 117 | # Delete output files in case of error |
1f2bfbd0 SR |
118 | cleanup() |
119 | { | |
120 | rm -f .old_version | |
121 | rm -f .tmp_System.map | |
122 | rm -f .tmp_kallsyms* | |
123 | rm -f .tmp_version | |
124 | rm -f .tmp_vmlinux* | |
125 | rm -f System.map | |
126 | rm -f vmlinux | |
127 | rm -f vmlinux.o | |
128 | } | |
129 | ||
ab160dbb SB |
130 | on_exit() |
131 | { | |
132 | if [ $? -ne 0 ]; then | |
133 | cleanup | |
134 | fi | |
135 | } | |
136 | trap on_exit EXIT | |
137 | ||
138 | on_signals() | |
139 | { | |
140 | exit 1 | |
141 | } | |
142 | trap on_signals HUP INT QUIT TERM | |
143 | ||
1f2bfbd0 SR |
144 | # |
145 | # | |
146 | # Use "make V=1" to debug this script | |
147 | case "${KBUILD_VERBOSE}" in | |
148 | *1*) | |
149 | set -x | |
150 | ;; | |
151 | esac | |
152 | ||
153 | if [ "$1" = "clean" ]; then | |
154 | cleanup | |
155 | exit 0 | |
156 | fi | |
157 | ||
158 | # We need access to CONFIG_ symbols | |
423a8155 MM |
159 | case "${KCONFIG_CONFIG}" in |
160 | */*) | |
161 | . "${KCONFIG_CONFIG}" | |
162 | ;; | |
163 | *) | |
164 | # Force using a file from the current directory | |
165 | . "./${KCONFIG_CONFIG}" | |
166 | esac | |
1f2bfbd0 SR |
167 | |
168 | #link vmlinux.o | |
169 | info LD vmlinux.o | |
170 | modpost_link vmlinux.o | |
171 | ||
172 | # modpost vmlinux.o to check for section mismatches | |
173 | ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o | |
174 | ||
175 | # Update version | |
176 | info GEN .version | |
177 | if [ ! -r .version ]; then | |
178 | rm -f .version; | |
179 | echo 1 >.version; | |
180 | else | |
181 | mv .version .old_version; | |
182 | expr 0$(cat .old_version) + 1 >.version; | |
183 | fi; | |
184 | ||
185 | # final build of init/ | |
186 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init | |
187 | ||
188 | kallsymso="" | |
189 | kallsyms_vmlinux="" | |
190 | if [ -n "${CONFIG_KALLSYMS}" ]; then | |
191 | ||
192 | # kallsyms support | |
193 | # Generate section listing all symbols and add it into vmlinux | |
194 | # It's a three step process: | |
195 | # 1) Link .tmp_vmlinux1 so it has all symbols and sections, | |
196 | # but __kallsyms is empty. | |
197 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
198 | # the right size | |
199 | # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of | |
200 | # the right size, but due to the added section, some | |
201 | # addresses have shifted. | |
202 | # From here, we generate a correct .tmp_kallsyms2.o | |
203 | # 2a) We may use an extra pass as this has been necessary to | |
204 | # woraround some alignment related bugs. | |
205 | # KALLSYMS_EXTRA_PASS=1 is used to trigger this. | |
206 | # 3) The correct ${kallsymso} is linked into the final vmlinux. | |
207 | # | |
208 | # a) Verify that the System.map from vmlinux matches the map from | |
209 | # ${kallsymso}. | |
210 | ||
211 | kallsymso=.tmp_kallsyms2.o | |
212 | kallsyms_vmlinux=.tmp_vmlinux2 | |
213 | ||
214 | # step 1 | |
215 | vmlinux_link "" .tmp_vmlinux1 | |
216 | kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o | |
217 | ||
218 | # step 2 | |
219 | vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2 | |
220 | kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o | |
221 | ||
222 | # step 2a | |
223 | if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then | |
224 | kallsymso=.tmp_kallsyms3.o | |
225 | kallsyms_vmlinux=.tmp_vmlinux3 | |
226 | ||
227 | vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3 | |
228 | ||
229 | kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o | |
230 | fi | |
231 | fi | |
232 | ||
233 | info LD vmlinux | |
234 | vmlinux_link "${kallsymso}" vmlinux | |
235 | ||
1347a2ce LT |
236 | if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then |
237 | info SORTEX vmlinux | |
238 | sortextable vmlinux | |
239 | fi | |
240 | ||
1f2bfbd0 SR |
241 | info SYSMAP System.map |
242 | mksysmap vmlinux System.map | |
243 | ||
244 | # step a (see comment above) | |
245 | if [ -n "${CONFIG_KALLSYMS}" ]; then | |
246 | mksysmap ${kallsyms_vmlinux} .tmp_System.map | |
247 | ||
248 | if ! cmp -s System.map .tmp_System.map; then | |
5369f550 | 249 | echo >&2 Inconsistent kallsyms data |
367e43c5 | 250 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
1f2bfbd0 SR |
251 | exit 1 |
252 | fi | |
253 | fi | |
254 | ||
255 | # We made a new kernel - delete old version file | |
256 | rm -f .old_version |