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[binutils.git] / ld / genscripts.sh
blob4c7226ad6b0ce9acd19956a62e34e39cbedef746
1 #!/bin/sh
2 # genscripts.sh - generate the ld-emulation-target specific files
4 # Usage: genscripts_extra.sh \
5 # srcdir \
6 # libdir \
7 # exec_prefix \
8 # host \
9 # target \
10 # target_alias \
11 # default_emulation \
12 # native_lib_dirs \
13 # use_sysroot \
14 # this_emulation \
15 # optional:
16 # tool_dir \
17 # customizer_script
19 # Sample usage:
21 # genscripts_extra.sh \
22 # /sources/ld \
23 # /usr/local/lib \
24 # /usr/local \
25 # sparc-sun-sunos4.1.3 \
26 # sparc-sun-sunos4.1.3 \
27 # sparc-sun-sunos4.1.3 \
28 # sun4 \
29 # "" \
30 # no \
31 # sun3 \
32 # sparc-sun-sunos4.1.3 \
33 # sparc.sh
35 # produces the linker scripts:
37 # sun3.x [default linker script]
38 # sun3.xbn [used when the linker is invoked with "-N"]
39 # sun3.xn [used when the linker is invoked with "-n"]
40 # sun3.xr [used when the linker is invoked with "-r"]
41 # sun3.xu [used when the linker is invoked with "-Ur"]
42 # and maybe:
43 # sun3.xc [used when the linker is invoked with "-z combreloc"]
44 # sun3.xsc [used when the linker is invoked with "--shared"]
45 # sun3.xdc [used when the linker is invoked with "-pie"]
47 # It also produced the C source file:
49 # em_sun3.c
51 # which is then compiled into the linker.
53 # The linker scripts are created by running the shell script
54 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
55 # (and any other variables it wants to). ${SCRIPT_NAME} is then
56 # invoked with a variable called ${LD_FLAG} to tell it which version
57 # of the linker script to create.
60 srcdir=$1
61 libdir=$2
62 exec_prefix=$3
63 host=$4
64 target=$5
65 target_alias=$6
66 EMULATION_LIBPATH=$7
67 NATIVE_LIB_DIRS=$8
68 use_sysroot=$9
69 shift 9
70 EMULATION_NAME=$1
71 TOOL_LIB=$2
72 CUSTOMIZER_SCRIPT=$3
74 # Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
75 if [ "x${TOOL_LIB}" = "x" ] ; then
76 tool_lib=${exec_prefix}/${target_alias}/lib
77 else
78 tool_lib=${exec_prefix}/${TOOL_LIB}/lib
81 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
82 CUSTOMIZER_SCRIPT=${EMULATION_NAME}
84 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
86 # Include the emulation-specific parameters:
87 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
89 if test -d ldscripts; then
90 true
91 else
92 mkdir ldscripts
95 # Set some flags for the emultempl scripts. USE_LIBPATH will
96 # be set for any libpath-using emulation; NATIVE will be set for a
97 # libpath-using emulation where ${host} = ${target}. NATIVE
98 # may already have been set by the emulparams file, but that's OK
99 # (it'll just get set to "yes" twice).
101 case " $EMULATION_LIBPATH " in
102 *" ${EMULATION_NAME} "*)
103 if [ "x${host}" = "x${target}" ] ; then
104 NATIVE=yes
105 USE_LIBPATH=yes
106 elif [ "x${use_sysroot}" = "xyes" ] ; then
107 USE_LIBPATH=yes
110 esac
112 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
113 if test "x$NATIVE" = "xyes" ; then
114 USE_LIBPATH=yes
117 # Set the library search path, for libraries named by -lfoo.
118 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
119 # Otherwise, the default is set here.
121 # The format is the usual list of colon-separated directories.
122 # To force a logically empty LIB_PATH, do LIBPATH=":".
124 # If we are using a sysroot, prefix library paths with "=" to indicate this.
126 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
127 # the library path with the suffix applied.
129 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
130 LIB_PATH2=
131 if [ x"$use_sysroot" != xyes ] ; then
132 LIB_PATH2=${libdir}
134 for lib in ${NATIVE_LIB_DIRS}; do
135 # The "=" is harmless if we aren't using a sysroot, but also needless.
136 if [ "x${use_sysroot}" = "xyes" ] ; then
137 lib="=${lib}"
139 addsuffix=
140 case "${LIBPATH_SUFFIX}:${lib}" in
141 :*) ;;
142 *:*${LIBPATH_SUFFIX}) ;;
143 *) addsuffix=yes ;;
144 esac
145 if test -n "$addsuffix"; then
146 case :${LIB_PATH}: in
147 *:${lib}${LIBPATH_SUFFIX}:*) ;;
148 ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
149 *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
150 esac
151 case :${LIB_PATH}:${LIB_PATH2}: in
152 *:${lib}:*) ;;
153 *::) LIB_PATH2=${lib} ;;
154 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
155 esac
156 else
157 case :${LIB_PATH2}: in
158 *:${lib}:*) ;;
159 ::) LIB_PATH2=${lib} ;;
160 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
161 esac
163 done
164 case :${LIB_PATH}:${LIB_PATH2}: in
165 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
166 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
167 esac
171 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
172 # sysrooted configurations and when LIBPATH=":".
173 if [ "x${use_sysroot}" != "xyes" ] ; then
174 case :${LIB_PATH}: in
175 ::: | *:${tool_lib}:*) ;;
176 ::) LIB_PATH=${tool_lib} ;;
177 *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
178 esac
181 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
183 # We need it for testsuite.
184 case " $EMULATION_LIBPATH " in
185 *" ${EMULATION_NAME} "*)
186 test -d tmpdir || mkdir tmpdir
187 test -f tmpdir/libpath.exp || \
188 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
190 esac
192 # Generate 5 or 6 script files from a master script template in
193 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
194 # script files is actually used depends on command line options given
195 # to ld. (SCRIPT_NAME was set in the emulparams_file.)
197 # A .x script file is the default script.
198 # A .xr script is for linking without relocation (-r flag).
199 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
200 # A .xn script is for linking with -n flag (mix text and data on same page).
201 # A .xbn script is for linking with -N flag (mix text and data on same page).
202 # A .xs script is for generating a shared library with the --shared
203 # flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
204 # emulation parameters.
205 # A .xc script is for linking with -z combreloc; it is only generated if
206 # $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
207 # $SCRIPT_NAME is "elf".
208 # A .xsc script is for linking with --shared -z combreloc; it is generated
209 # if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
210 # $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
211 # parameters too.
213 if [ "x$SCRIPT_NAME" = "xelf" ]; then
214 GENERATE_COMBRELOC_SCRIPT=yes
217 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
219 # Determine DATA_ALIGNMENT for the 5 variants, using
220 # values specified in the emulparams/<script_to_run>.sh file or default.
222 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
223 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
224 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
225 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
226 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
228 LD_FLAG=r
229 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
230 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
231 ( echo "/* Script for ld -r: link without relocation */"
232 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
233 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
234 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
236 LD_FLAG=u
237 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
238 CONSTRUCTING=" "
239 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
240 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
241 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
242 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
244 LD_FLAG=
245 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
246 RELOCATING=" "
247 ( echo "/* Default linker script, for normal executables */"
248 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
249 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
250 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
252 LD_FLAG=n
253 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
254 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
255 ( echo "/* Script for -n: mix text and data on same page */"
256 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
257 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
258 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
260 LD_FLAG=N
261 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
262 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
263 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
264 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
265 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
267 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
268 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
269 LD_FLAG=c
270 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
271 ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
272 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
273 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
274 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
275 rm -f ${COMBRELOC}
276 COMBRELOC=
279 if test -n "$GENERATE_SHLIB_SCRIPT"; then
280 LD_FLAG=shared
281 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
282 CREATE_SHLIB=" "
283 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
285 echo "/* Script for ld --shared: link shared library */"
286 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
287 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
288 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
289 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
290 LD_FLAG=cshared
291 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
292 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
293 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
294 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
295 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
296 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
297 rm -f ${COMBRELOC}
298 COMBRELOC=
300 unset CREATE_SHLIB
303 if test -n "$GENERATE_PIE_SCRIPT"; then
304 LD_FLAG=pie
305 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
306 CREATE_PIE=" "
307 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
309 echo "/* Script for ld -pie: link position independent executable */"
310 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
311 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
312 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
313 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
314 LD_FLAG=cpie
315 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
316 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
317 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
318 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
319 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
320 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
321 rm -f ${COMBRELOC}
322 COMBRELOC=
324 unset CREATE_PIE
327 case " $EMULATION_LIBPATH " in
328 *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
329 esac
331 # Generate e${EMULATION_NAME}.c.
332 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em