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[binutils.git] / ld / genscripts.sh
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1 #!/bin/sh
2 # genscripts.sh - generate the ld-emulation-target specific files
3 # Copyright 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
5 # This file is part of the Gnu Linker.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
10 # any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GLD; see the file COPYING. If not, write to the Free
19 # Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
20 # 02110-1301, USA.
22 # Usage: genscripts_extra.sh \
23 # srcdir \
24 # libdir \
25 # prefix \
26 # exec_prefix \
27 # host \
28 # target \
29 # target_alias \
30 # default_emulation \
31 # native_lib_dirs \
32 # use_sysroot \
33 # enable_initfini_array \
34 # this_emulation \
35 # optional:
36 # tool_dir \
37 # customizer_script
39 # Sample usage:
41 # genscripts_extra.sh \
42 # /sources/ld \
43 # /usr/local/lib \
44 # /usr/local \
45 # /usr/local \
46 # sparc-sun-sunos4.1.3 \
47 # sparc-sun-sunos4.1.3 \
48 # sparc-sun-sunos4.1.3 \
49 # sun4 \
50 # "" \
51 # no \
52 # sun3 \
53 # sparc-sun-sunos4.1.3 \
54 # sparc.sh
56 # produces the linker scripts:
58 # sun3.x [default linker script]
59 # sun3.xbn [used when the linker is invoked with "-N"]
60 # sun3.xn [used when the linker is invoked with "-n"]
61 # sun3.xr [used when the linker is invoked with "-r"]
62 # sun3.xu [used when the linker is invoked with "-Ur"]
63 # and maybe:
64 # sun3.xc [used when the linker is invoked with "-z combreloc"]
65 # sun3.xsc [used when the linker is invoked with "--shared"]
66 # sun3.xdc [used when the linker is invoked with "-pie"]
67 # sun3.xa [used when the linker is invoked with "--enable-auto-import"]
69 # It also produced the C source file:
71 # em_sun3.c
73 # which is then compiled into the linker.
75 # The linker scripts are created by running the shell script
76 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
77 # (and any other variables it wants to). ${SCRIPT_NAME} is then
78 # invoked with a variable called ${LD_FLAG} to tell it which version
79 # of the linker script to create.
82 srcdir=$1
83 libdir=$2
84 prefix=$3
85 exec_prefix=$4
86 host=$5
87 target=$6
88 target_alias=$7
89 EMULATION_LIBPATH=$8
90 NATIVE_LIB_DIRS=$9
91 shift 9
92 use_sysroot=$1
93 ENABLE_INITFINI_ARRAY=$2
94 EMULATION_NAME=$3
95 TOOL_LIB=$4
96 CUSTOMIZER_SCRIPT=$5
98 # Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
99 if [ "x${TOOL_LIB}" = "x" ] ; then
100 tool_lib=${exec_prefix}/${target_alias}/lib
101 else
102 tool_lib=${exec_prefix}/${TOOL_LIB}/lib
105 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
106 CUSTOMIZER_SCRIPT=${EMULATION_NAME}
108 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
110 # Include the emulation-specific parameters:
111 . ${CUSTOMIZER_SCRIPT}
113 if test -d ldscripts; then
114 true
115 else
116 mkdir ldscripts
119 # Set some flags for the emultempl scripts. USE_LIBPATH will
120 # be set for any libpath-using emulation; NATIVE will be set for a
121 # libpath-using emulation where ${host} = ${target}. NATIVE
122 # may already have been set by the emulparams file, but that's OK
123 # (it'll just get set to "yes" twice).
125 case " $EMULATION_LIBPATH " in
126 *" ${EMULATION_NAME} "*)
127 if [ "x${host}" = "x${target}" ] ; then
128 NATIVE=yes
129 USE_LIBPATH=yes
130 elif [ "x${use_sysroot}" = "xyes" ] ; then
131 USE_LIBPATH=yes
134 esac
136 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
137 if test "x$NATIVE" = "xyes" ; then
138 USE_LIBPATH=yes
141 # Set the library search path, for libraries named by -lfoo.
142 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
143 # Otherwise, the default is set here.
145 # The format is the usual list of colon-separated directories.
146 # To force a logically empty LIB_PATH, do LIBPATH=":".
148 # If we are using a sysroot, prefix library paths with "=" to indicate this.
150 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
151 # the library path with the suffix applied.
153 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
154 LIB_PATH2=
156 libs=${NATIVE_LIB_DIRS}
157 if [ "x${use_sysroot}" != "xyes" ] ; then
158 case " ${libs} " in
159 *" ${libdir} "*) ;;
160 *) libs="${libdir} ${libs}" ;;
161 esac
162 case " ${libs} " in
163 *" ${tool_lib} "*) ;;
164 *) libs="${tool_lib} ${libs}" ;;
165 esac
168 for lib in ${libs}; do
169 # The "=" is harmless if we aren't using a sysroot, but also needless.
170 if [ "x${use_sysroot}" = "xyes" ] ; then
171 lib="=${lib}"
173 addsuffix=
174 case "${LIBPATH_SUFFIX}:${lib}" in
175 :*) ;;
176 *:*${LIBPATH_SUFFIX}) ;;
177 *) addsuffix=yes ;;
178 esac
179 if test -n "$addsuffix"; then
180 case :${LIB_PATH}: in
181 *:${lib}${LIBPATH_SUFFIX}:*) ;;
182 ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
183 *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
184 esac
185 case :${LIB_PATH}:${LIB_PATH2}: in
186 *:${lib}:*) ;;
187 *::) LIB_PATH2=${lib} ;;
188 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
189 esac
190 else
191 case :${LIB_PATH2}: in
192 *:${lib}:*) ;;
193 ::) LIB_PATH2=${lib} ;;
194 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
195 esac
197 done
199 case :${LIB_PATH}:${LIB_PATH2}: in
200 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
201 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
202 esac
204 # For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX}
205 # and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path, because
206 # 64bit libraries may be in both places, depending on cross-development
207 # setup method (e.g.: /usr/s390x-linux/lib64 vs /usr/s390-linux/lib64)
208 case "${LIBPATH_SUFFIX}:${tool_lib}" in
209 :*) ;;
210 *:*${LIBPATH_SUFFIX}) ;;
212 paths="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}"
213 if [ x"${TOOL_LIB}" != x ]; then
214 paths="${paths} ${exec_prefix}/${TOOL_LIB}/lib${LIBPATH_SUFFIX}"
216 for path in $paths; do
217 case :${LIB_PATH}: in
218 ::: | *:${path}:*) ;;
219 *) LIB_PATH=${path}:${LIB_PATH} ;;
220 esac
221 done
223 esac
226 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
227 # sysrooted configurations and when LIBPATH=":".
228 if [ "x${use_sysroot}" != "xyes" ] ; then
229 case :${LIB_PATH}: in
230 ::: | *:${tool_lib}:*) ;;
231 ::) LIB_PATH=${tool_lib} ;;
232 *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
233 esac
234 # For multilib targets, search both $tool_lib dirs
235 if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then
236 case :${LIB_PATH}: in
237 ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;;
238 ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;;
239 *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;;
240 esac
244 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
246 # We need it for testsuite.
247 set $EMULATION_LIBPATH
248 if [ "x$1" = "x$EMULATION_NAME" ]; then
249 test -d tmpdir || mkdir tmpdir
250 rm -f tmpdir/libpath.exp
251 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
254 # Generate 5 or 6 script files from a master script template in
255 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
256 # script files is actually used depends on command line options given
257 # to ld. (SCRIPT_NAME was set in the emulparams_file.)
259 # A .x script file is the default script.
260 # A .xr script is for linking without relocation (-r flag).
261 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
262 # A .xn script is for linking with -n flag (mix text and data on same page).
263 # A .xbn script is for linking with -N flag (mix text and data on same page).
264 # A .xs script is for generating a shared library with the --shared
265 # flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
266 # emulation parameters.
267 # A .xc script is for linking with -z combreloc; it is only generated if
268 # $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
269 # $SCRIPT_NAME is "elf".
270 # A .xsc script is for linking with --shared -z combreloc; it is generated
271 # if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
272 # $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
273 # parameters too.
275 if [ "x$SCRIPT_NAME" = "xelf" ]; then
276 GENERATE_COMBRELOC_SCRIPT=yes
279 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
281 # Determine DATA_ALIGNMENT for the 5 variants, using
282 # values specified in the emulparams/<script_to_run>.sh file or default.
284 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
285 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
286 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
287 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
288 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
290 LD_FLAG=r
291 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
292 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
293 ( echo "/* Script for ld -r: link without relocation */"
294 . ${CUSTOMIZER_SCRIPT}
295 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
296 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
298 LD_FLAG=u
299 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
300 CONSTRUCTING=" "
301 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
302 . ${CUSTOMIZER_SCRIPT}
303 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
304 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
306 LD_FLAG=
307 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
308 RELOCATING=" "
309 ( echo "/* Default linker script, for normal executables */"
310 . ${CUSTOMIZER_SCRIPT}
311 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
312 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
314 LD_FLAG=n
315 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
316 ( echo "/* Script for -n: mix text and data on same page */"
317 . ${CUSTOMIZER_SCRIPT}
318 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
319 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
321 LD_FLAG=N
322 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
323 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
324 . ${CUSTOMIZER_SCRIPT}
325 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
326 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
328 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
329 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
330 LD_FLAG=c
331 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
332 ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
333 . ${CUSTOMIZER_SCRIPT}
334 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
335 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
336 rm -f ${COMBRELOC}
337 LD_FLAG=w
338 RELRO_NOW=" "
339 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
340 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
341 . ${CUSTOMIZER_SCRIPT}
342 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
343 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw
344 rm -f ${COMBRELOC}
345 COMBRELOC=
346 unset RELRO_NOW
349 if test -n "$GENERATE_SHLIB_SCRIPT"; then
350 LD_FLAG=shared
351 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
352 CREATE_SHLIB=" "
354 echo "/* Script for ld --shared: link shared library */"
355 . ${CUSTOMIZER_SCRIPT}
356 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
357 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
358 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
359 LD_FLAG=cshared
360 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
361 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
362 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
363 . ${CUSTOMIZER_SCRIPT}
364 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
365 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
366 rm -f ${COMBRELOC}
367 LD_FLAG=wshared
368 RELRO_NOW=" "
369 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
370 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
371 . ${CUSTOMIZER_SCRIPT}
372 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
373 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
374 rm -f ${COMBRELOC}
375 COMBRELOC=
376 unset RELRO_NOW
378 unset CREATE_SHLIB
381 if test -n "$GENERATE_PIE_SCRIPT"; then
382 LD_FLAG=pie
383 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
384 CREATE_PIE=" "
386 echo "/* Script for ld -pie: link position independent executable */"
387 . ${CUSTOMIZER_SCRIPT}
388 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
389 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
390 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
391 LD_FLAG=cpie
392 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
393 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
394 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
395 . ${CUSTOMIZER_SCRIPT}
396 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
397 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
398 rm -f ${COMBRELOC}
399 LD_FLAG=wpie
400 RELRO_NOW=" "
401 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
402 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
403 . ${CUSTOMIZER_SCRIPT}
404 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
405 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
406 rm -f ${COMBRELOC}
407 COMBRELOC=
408 unset RELRO_NOW
410 unset CREATE_PIE
413 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
414 LD_FLAG=auto_import
415 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
417 echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */"
418 . ${CUSTOMIZER_SCRIPT}
419 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
420 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa
423 case " $EMULATION_LIBPATH " in
424 *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
425 esac
427 # PR ld/5652:
428 # Determine if the shell has support for the variable BASH_LINENO.
429 # When it is the case, it is only available inside functions.
430 has_lineno()
432 test "x$BASH_LINENO" != "x"
435 # Enable accruate error source in the compiler error messages, if possible.
436 if has_lineno; then
437 . ${srcdir}/genscrba.sh
438 else
439 source_em()
441 . $1
443 fragment()
445 cat >> e${EMULATION_NAME}.c
449 # Generate e${EMULATION_NAME}.c.
450 # Start with an empty file, then the sourced .em script
451 # can use the "fragment" function to append.
452 > e${EMULATION_NAME}.c
453 source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em