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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 | # +-< ${kallsymso} (see description in KALLSYMS section) |
20 | # |
21 | # vmlinux version (uname -v) cannot be updated during normal |
22 | # descending-into-subdirs phase since we do not yet know if we need to |
23 | # update vmlinux. |
24 | # Therefore this step is delayed until just before final link of vmlinux. |
25 | # |
26 | # System.map is generated to document addresses of all kernel symbols |
27 | |
28 | # Error out on error |
29 | set -e |
30 | |
31 | # Nice output in kbuild format |
32 | # Will be supressed by "make -s" |
33 | info() |
34 | { |
35 | if [ "${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 \ |
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 |
72 | kallsyms() |
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="${kallsymopt} --all-symbols" |
83 | fi |
84 | |
85 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
86 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" |
87 | |
88 | ${NM} -n ${1} | \ |
89 | scripts/kallsyms ${kallsymopt} | \ |
90 | ${CC} ${aflags} -c -o ${2} -x assembler-with-cpp - |
91 | } |
92 | |
93 | # Create map file with all symbols from ${1} |
94 | # See mksymap for additional details |
95 | mksysmap() |
96 | { |
97 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} |
98 | } |
99 | |
100 | sortextable() |
101 | { |
102 | ${objtree}/scripts/sortextable ${1} |
103 | } |
104 | |
105 | # Delete output files in case of error |
106 | trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR |
107 | cleanup() |
108 | { |
109 | rm -f .old_version |
110 | rm -f .tmp_System.map |
111 | rm -f .tmp_kallsyms* |
112 | rm -f .tmp_version |
113 | rm -f .tmp_vmlinux* |
114 | rm -f System.map |
115 | rm -f vmlinux |
116 | rm -f vmlinux.o |
117 | } |
118 | |
119 | # |
120 | # |
121 | # Use "make V=1" to debug this script |
122 | case "${KBUILD_VERBOSE}" in |
123 | *1*) |
124 | set -x |
125 | ;; |
126 | esac |
127 | |
128 | if [ "$1" = "clean" ]; then |
129 | cleanup |
130 | exit 0 |
131 | fi |
132 | |
133 | # We need access to CONFIG_ symbols |
134 | case "${KCONFIG_CONFIG}" in |
135 | */*) |
136 | . "${KCONFIG_CONFIG}" |
137 | ;; |
138 | *) |
139 | # Force using a file from the current directory |
140 | . "./${KCONFIG_CONFIG}" |
141 | esac |
142 | |
143 | #link vmlinux.o |
144 | info LD vmlinux.o |
145 | modpost_link vmlinux.o |
146 | |
147 | # modpost vmlinux.o to check for section mismatches |
148 | ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o |
149 | |
150 | # Update version |
151 | info GEN .version |
152 | if [ ! -r .version ]; then |
153 | rm -f .version; |
154 | echo 1 >.version; |
155 | else |
156 | mv .version .old_version; |
157 | expr 0$(cat .old_version) + 1 >.version; |
158 | fi; |
159 | |
160 | # final build of init/ |
161 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init |
162 | |
163 | kallsymso="" |
164 | kallsyms_vmlinux="" |
165 | if [ -n "${CONFIG_KALLSYMS}" ]; then |
166 | |
167 | # kallsyms support |
168 | # Generate section listing all symbols and add it into vmlinux |
169 | # It's a three step process: |
170 | # 1) Link .tmp_vmlinux1 so it has all symbols and sections, |
171 | # but __kallsyms is empty. |
172 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
173 | # the right size |
174 | # 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of |
175 | # the right size, but due to the added section, some |
176 | # addresses have shifted. |
177 | # From here, we generate a correct .tmp_kallsyms2.o |
178 | # 2a) We may use an extra pass as this has been necessary to |
179 | # woraround some alignment related bugs. |
180 | # KALLSYMS_EXTRA_PASS=1 is used to trigger this. |
181 | # 3) The correct ${kallsymso} is linked into the final vmlinux. |
182 | # |
183 | # a) Verify that the System.map from vmlinux matches the map from |
184 | # ${kallsymso}. |
185 | |
186 | kallsymso=.tmp_kallsyms2.o |
187 | kallsyms_vmlinux=.tmp_vmlinux2 |
188 | |
189 | # step 1 |
190 | vmlinux_link "" .tmp_vmlinux1 |
191 | kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o |
192 | |
193 | # step 2 |
194 | vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2 |
195 | kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o |
196 | |
197 | # step 2a |
198 | if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then |
199 | kallsymso=.tmp_kallsyms3.o |
200 | kallsyms_vmlinux=.tmp_vmlinux3 |
201 | |
202 | vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3 |
203 | |
204 | kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o |
205 | fi |
206 | fi |
207 | |
208 | info LD vmlinux |
209 | vmlinux_link "${kallsymso}" vmlinux |
210 | |
211 | if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then |
212 | info SORTEX vmlinux |
213 | sortextable vmlinux |
214 | fi |
215 | |
216 | info SYSMAP System.map |
217 | mksysmap vmlinux System.map |
218 | |
219 | # step a (see comment above) |
220 | if [ -n "${CONFIG_KALLSYMS}" ]; then |
221 | mksysmap ${kallsyms_vmlinux} .tmp_System.map |
222 | |
223 | if ! cmp -s System.map .tmp_System.map; then |
224 | echo >&2 Inconsistent kallsyms data |
225 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
226 | cleanup |
227 | exit 1 |
228 | fi |
229 | fi |
230 | |
231 | # We made a new kernel - delete old version file |
232 | rm -f .old_version |
233 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9