Commit | Line | Data |
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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 \ | |
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_KALLSYMS_ALL}" ]; then | |
78 | kallsymopt=--all-symbols | |
79 | fi | |
80 | ||
00e6c28c SR |
81 | local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ |
82 | ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" | |
1f2bfbd0 SR |
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 | |
91 | mksysmap() | |
92 | { | |
93 | ${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2} | |
94 | } | |
95 | ||
1347a2ce LT |
96 | sortextable() |
97 | { | |
98 | ${objtree}/scripts/sortextable ${1} | |
99 | } | |
100 | ||
1f2bfbd0 SR |
101 | # Delete output files in case of error |
102 | trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR | |
103 | cleanup() | |
104 | { | |
105 | rm -f .old_version | |
106 | rm -f .tmp_System.map | |
107 | rm -f .tmp_kallsyms* | |
108 | rm -f .tmp_version | |
109 | rm -f .tmp_vmlinux* | |
110 | rm -f System.map | |
111 | rm -f vmlinux | |
112 | rm -f vmlinux.o | |
113 | } | |
114 | ||
115 | # | |
116 | # | |
117 | # Use "make V=1" to debug this script | |
118 | case "${KBUILD_VERBOSE}" in | |
119 | *1*) | |
120 | set -x | |
121 | ;; | |
122 | esac | |
123 | ||
124 | if [ "$1" = "clean" ]; then | |
125 | cleanup | |
126 | exit 0 | |
127 | fi | |
128 | ||
129 | # We need access to CONFIG_ symbols | |
130 | . ./.config | |
131 | ||
132 | #link vmlinux.o | |
133 | info LD vmlinux.o | |
134 | modpost_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 | |
140 | info GEN .version | |
141 | if [ ! -r .version ]; then | |
142 | rm -f .version; | |
143 | echo 1 >.version; | |
144 | else | |
145 | mv .version .old_version; | |
146 | expr 0$(cat .old_version) + 1 >.version; | |
147 | fi; | |
148 | ||
149 | # final build of init/ | |
150 | ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init | |
151 | ||
152 | kallsymso="" | |
153 | kallsyms_vmlinux="" | |
154 | if [ -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 | |
195 | fi | |
196 | ||
197 | info LD vmlinux | |
198 | vmlinux_link "${kallsymso}" vmlinux | |
199 | ||
1347a2ce LT |
200 | if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then |
201 | info SORTEX vmlinux | |
202 | sortextable vmlinux | |
203 | fi | |
204 | ||
1f2bfbd0 SR |
205 | info SYSMAP System.map |
206 | mksysmap vmlinux System.map | |
207 | ||
208 | # step a (see comment above) | |
209 | if [ -n "${CONFIG_KALLSYMS}" ]; then | |
210 | mksysmap ${kallsyms_vmlinux} .tmp_System.map | |
211 | ||
212 | if ! cmp -s System.map .tmp_System.map; then | |
5369f550 | 213 | echo >&2 Inconsistent kallsyms data |
367e43c5 | 214 | echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround |
1f2bfbd0 SR |
215 | cleanup |
216 | exit 1 | |
217 | fi | |
218 | fi | |
219 | ||
220 | # We made a new kernel - delete old version file | |
221 | rm -f .old_version |