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[binutils/dougsmingw.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 # this_emulation \
34 # optional:
35 # tool_dir \
36 # customizer_script
38 # Sample usage:
40 # genscripts_extra.sh \
41 # /sources/ld \
42 # /usr/local/lib \
43 # /usr/local \
44 # /usr/local \
45 # sparc-sun-sunos4.1.3 \
46 # sparc-sun-sunos4.1.3 \
47 # sparc-sun-sunos4.1.3 \
48 # sun4 \
49 # "" \
50 # no \
51 # sun3 \
52 # sparc-sun-sunos4.1.3 \
53 # sparc.sh
55 # produces the linker scripts:
57 # sun3.x [default linker script]
58 # sun3.xbn [used when the linker is invoked with "-N"]
59 # sun3.xn [used when the linker is invoked with "-n"]
60 # sun3.xr [used when the linker is invoked with "-r"]
61 # sun3.xu [used when the linker is invoked with "-Ur"]
62 # and maybe:
63 # sun3.xc [used when the linker is invoked with "-z combreloc"]
64 # sun3.xsc [used when the linker is invoked with "--shared"]
65 # sun3.xdc [used when the linker is invoked with "-pie"]
66 # sun3.xa [used when the linker is invoked with "--enable-auto-import"]
68 # It also produced the C source file:
70 # em_sun3.c
72 # which is then compiled into the linker.
74 # The linker scripts are created by running the shell script
75 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
76 # (and any other variables it wants to). ${SCRIPT_NAME} is then
77 # invoked with a variable called ${LD_FLAG} to tell it which version
78 # of the linker script to create.
81 srcdir=$1
82 libdir=$2
83 prefix=$3
84 exec_prefix=$4
85 host=$5
86 target=$6
87 target_alias=$7
88 EMULATION_LIBPATH=$8
89 NATIVE_LIB_DIRS=$9
90 shift 9
91 use_sysroot=$1
92 EMULATION_NAME=$2
93 TOOL_LIB=$3
94 CUSTOMIZER_SCRIPT=$4
96 # Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
97 if [ "x${TOOL_LIB}" = "x" ] ; then
98 tool_lib=${exec_prefix}/${target_alias}/lib
99 else
100 tool_lib=${exec_prefix}/${TOOL_LIB}/lib
103 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
104 CUSTOMIZER_SCRIPT=${EMULATION_NAME}
106 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
108 # Include the emulation-specific parameters:
109 . ${CUSTOMIZER_SCRIPT}
111 if test -d ldscripts; then
112 true
113 else
114 mkdir ldscripts
117 # Set some flags for the emultempl scripts. USE_LIBPATH will
118 # be set for any libpath-using emulation; NATIVE will be set for a
119 # libpath-using emulation where ${host} = ${target}. NATIVE
120 # may already have been set by the emulparams file, but that's OK
121 # (it'll just get set to "yes" twice).
123 case " $EMULATION_LIBPATH " in
124 *" ${EMULATION_NAME} "*)
125 if [ "x${host}" = "x${target}" ] ; then
126 NATIVE=yes
127 USE_LIBPATH=yes
128 elif [ "x${use_sysroot}" = "xyes" ] ; then
129 USE_LIBPATH=yes
132 esac
134 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
135 if test "x$NATIVE" = "xyes" ; then
136 USE_LIBPATH=yes
139 # Set the library search path, for libraries named by -lfoo.
140 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
141 # Otherwise, the default is set here.
143 # The format is the usual list of colon-separated directories.
144 # To force a logically empty LIB_PATH, do LIBPATH=":".
146 # If we are using a sysroot, prefix library paths with "=" to indicate this.
148 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
149 # the library path with the suffix applied.
151 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
152 LIB_PATH2=
154 libs=${NATIVE_LIB_DIRS}
155 if [ "x${use_sysroot}" != "xyes" ] ; then
156 case " ${libs} " in
157 *" ${libdir} "*) ;;
158 *) libs="${libdir} ${libs}" ;;
159 esac
160 case " ${libs} " in
161 *" ${tool_lib} "*) ;;
162 *) libs="${tool_lib} ${libs}" ;;
163 esac
166 for lib in ${libs}; do
167 # The "=" is harmless if we aren't using a sysroot, but also needless.
168 if [ "x${use_sysroot}" = "xyes" ] ; then
169 lib="=${lib}"
171 addsuffix=
172 case "${LIBPATH_SUFFIX}:${lib}" in
173 :*) ;;
174 *:*${LIBPATH_SUFFIX}) ;;
175 *) addsuffix=yes ;;
176 esac
177 if test -n "$addsuffix"; then
178 case :${LIB_PATH}: in
179 *:${lib}${LIBPATH_SUFFIX}:*) ;;
180 ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
181 *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
182 esac
183 case :${LIB_PATH}:${LIB_PATH2}: in
184 *:${lib}:*) ;;
185 *::) LIB_PATH2=${lib} ;;
186 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
187 esac
188 else
189 case :${LIB_PATH2}: in
190 *:${lib}:*) ;;
191 ::) LIB_PATH2=${lib} ;;
192 *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
193 esac
195 done
197 case :${LIB_PATH}:${LIB_PATH2}: in
198 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
199 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
200 esac
202 # For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX}
203 # and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path, because
204 # 64bit libraries may be in both places, depending on cross-development
205 # setup method (e.g.: /usr/s390x-linux/lib64 vs /usr/s390-linux/lib64)
206 case "${LIBPATH_SUFFIX}:${tool_lib}" in
207 :*) ;;
208 *:*${LIBPATH_SUFFIX}) ;;
210 paths="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}"
211 if [ x"${TOOL_LIB}" != x ]; then
212 paths="${paths} ${exec_prefix}/${TOOL_LIB}/lib${LIBPATH_SUFFIX}"
214 for path in $paths; do
215 case :${LIB_PATH}: in
216 ::: | *:${path}:*) ;;
217 *) LIB_PATH=${path}:${LIB_PATH} ;;
218 esac
219 done
221 esac
224 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
225 # sysrooted configurations and when LIBPATH=":".
226 if [ "x${use_sysroot}" != "xyes" ] ; then
227 case :${LIB_PATH}: in
228 ::: | *:${tool_lib}:*) ;;
229 ::) LIB_PATH=${tool_lib} ;;
230 *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
231 esac
232 # For multilib targets, search both $tool_lib dirs
233 if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then
234 case :${LIB_PATH}: in
235 ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;;
236 ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;;
237 *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;;
238 esac
242 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
244 # We need it for testsuite.
245 set $EMULATION_LIBPATH
246 if [ "x$1" = "x$EMULATION_NAME" ]; then
247 test -d tmpdir || mkdir tmpdir
248 rm -f tmpdir/libpath.exp
249 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
252 # Generate 5 or 6 script files from a master script template in
253 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
254 # script files is actually used depends on command line options given
255 # to ld. (SCRIPT_NAME was set in the emulparams_file.)
257 # A .x script file is the default script.
258 # A .xr script is for linking without relocation (-r flag).
259 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
260 # A .xn script is for linking with -n flag (mix text and data on same page).
261 # A .xbn script is for linking with -N flag (mix text and data on same page).
262 # A .xs script is for generating a shared library with the --shared
263 # flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
264 # emulation parameters.
265 # A .xc script is for linking with -z combreloc; it is only generated if
266 # $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
267 # $SCRIPT_NAME is "elf".
268 # A .xsc script is for linking with --shared -z combreloc; it is generated
269 # if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
270 # $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
271 # parameters too.
273 if [ "x$SCRIPT_NAME" = "xelf" ]; then
274 GENERATE_COMBRELOC_SCRIPT=yes
277 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
279 # Determine DATA_ALIGNMENT for the 5 variants, using
280 # values specified in the emulparams/<script_to_run>.sh file or default.
282 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
283 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
284 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
285 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
286 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
288 LD_FLAG=r
289 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
290 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
291 ( echo "/* Script for ld -r: link without relocation */"
292 . ${CUSTOMIZER_SCRIPT}
293 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
294 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
296 LD_FLAG=u
297 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
298 CONSTRUCTING=" "
299 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
300 . ${CUSTOMIZER_SCRIPT}
301 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
302 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
304 LD_FLAG=
305 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
306 RELOCATING=" "
307 ( echo "/* Default linker script, for normal executables */"
308 . ${CUSTOMIZER_SCRIPT}
309 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
310 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
312 LD_FLAG=n
313 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
314 ( echo "/* Script for -n: mix text and data on same page */"
315 . ${CUSTOMIZER_SCRIPT}
316 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
317 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
319 LD_FLAG=N
320 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
321 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
322 . ${CUSTOMIZER_SCRIPT}
323 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
324 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
326 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
327 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
328 LD_FLAG=c
329 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
330 ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
331 . ${CUSTOMIZER_SCRIPT}
332 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
333 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
334 rm -f ${COMBRELOC}
335 LD_FLAG=w
336 RELRO_NOW=" "
337 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
338 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
339 . ${CUSTOMIZER_SCRIPT}
340 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
341 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw
342 rm -f ${COMBRELOC}
343 COMBRELOC=
344 unset RELRO_NOW
347 if test -n "$GENERATE_SHLIB_SCRIPT"; then
348 LD_FLAG=shared
349 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
350 CREATE_SHLIB=" "
352 echo "/* Script for ld --shared: link shared library */"
353 . ${CUSTOMIZER_SCRIPT}
354 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
355 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
356 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
357 LD_FLAG=cshared
358 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
359 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
360 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
361 . ${CUSTOMIZER_SCRIPT}
362 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
363 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
364 rm -f ${COMBRELOC}
365 LD_FLAG=wshared
366 RELRO_NOW=" "
367 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
368 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
369 . ${CUSTOMIZER_SCRIPT}
370 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
371 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
372 rm -f ${COMBRELOC}
373 COMBRELOC=
374 unset RELRO_NOW
376 unset CREATE_SHLIB
379 if test -n "$GENERATE_PIE_SCRIPT"; then
380 LD_FLAG=pie
381 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
382 CREATE_PIE=" "
384 echo "/* Script for ld -pie: link position independent executable */"
385 . ${CUSTOMIZER_SCRIPT}
386 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
387 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
388 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
389 LD_FLAG=cpie
390 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
391 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
392 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
393 . ${CUSTOMIZER_SCRIPT}
394 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
395 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
396 rm -f ${COMBRELOC}
397 LD_FLAG=wpie
398 RELRO_NOW=" "
399 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
400 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
401 . ${CUSTOMIZER_SCRIPT}
402 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
403 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
404 rm -f ${COMBRELOC}
405 COMBRELOC=
406 unset RELRO_NOW
408 unset CREATE_PIE
411 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
412 LD_FLAG=auto_import
413 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
415 echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */"
416 . ${CUSTOMIZER_SCRIPT}
417 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
418 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa
421 case " $EMULATION_LIBPATH " in
422 *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
423 esac
425 # PR ld/5652:
426 # Determine if the shell has support for the variable BASH_LINENO.
427 # When it is the case, it is only available inside functions.
428 has_lineno()
430 test "x$BASH_LINENO" != "x"
433 # Enable accruate error source in the compiler error messages, if possible.
434 if has_lineno; then
435 . ${srcdir}/genscrba.sh
436 else
437 source_em()
439 . $1
441 fragment()
443 cat >> e${EMULATION_NAME}.c
447 # Generate e${EMULATION_NAME}.c.
448 # Start with an empty file, then the sourced .em script
449 # can use the "fragment" function to append.
450 > e${EMULATION_NAME}.c
451 source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em