1#!/bin/sh 2# genscripts.sh - generate the ld-emulation-target specific files 3# Copyright 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. 4# 5# This file is part of the Gnu Linker. 6# 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. 11# 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. 16# 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. 21# 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 38# 39# Sample usage: 40# 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 55# 56# produces the linker scripts: 57# 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"] 68# 69# It also produced the C source file: 70# 71# em_sun3.c 72# 73# which is then compiled into the linker. 74# 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. 80 81 82srcdir=$1 83libdir=$2 84prefix=$3 85exec_prefix=$4 86host=$5 87target=$6 88target_alias=$7 89EMULATION_LIBPATH=$8 90NATIVE_LIB_DIRS=$9 91shift 9 92use_sysroot=$1 93ENABLE_INITFINI_ARRAY=$2 94EMULATION_NAME=$3 95TOOL_LIB=$4 96CUSTOMIZER_SCRIPT=$5 97 98# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug. 99if [ "x${TOOL_LIB}" = "x" ] ; then 100 tool_lib=${exec_prefix}/${target_alias}/lib 101else 102 tool_lib=${exec_prefix}/${TOOL_LIB}/lib 103fi 104 105if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then 106 CUSTOMIZER_SCRIPT=${EMULATION_NAME} 107fi 108CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh" 109 110# Include the emulation-specific parameters: 111. ${CUSTOMIZER_SCRIPT} 112 113if test -d ldscripts; then 114 true 115else 116 mkdir ldscripts 117fi 118 119# 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). 124 125case " $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 132 fi 133 ;; 134esac 135 136# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also. 137if test "x$NATIVE" = "xyes" ; then 138 USE_LIBPATH=yes 139fi 140 141# Set the library search path, for libraries named by -lfoo. 142# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 143# Otherwise, the default is set here. 144# 145# The format is the usual list of colon-separated directories. 146# To force a logically empty LIB_PATH, do LIBPATH=":". 147# 148# If we are using a sysroot, prefix library paths with "=" to indicate this. 149# 150# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of 151# the library path with the suffix applied. 152 153if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then 154 LIB_PATH2= 155 156 libs=${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 166 fi 167 168 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="=${lib}" 172 fi 173 addsuffix= 174 case "${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 196 fi 197 done 198 199 case :${LIB_PATH}:${LIB_PATH2}: in 200 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;; 201 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;; 202 esac 203 204 # 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 *:*${LIBPATH_SUFFIX}) ;; 211 *) 212 paths="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" 213 if [ x"${TOOL_LIB}" != x ]; then 214 paths="${paths} ${exec_prefix}/${TOOL_LIB}/lib${LIBPATH_SUFFIX}" 215 fi 216 for path in $paths; do 217 case :${LIB_PATH}: in 218 ::: | *:${path}:*) ;; 219 *) LIB_PATH=${path}:${LIB_PATH} ;; 220 esac 221 done 222 ;; 223 esac 224fi 225 226# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for 227# sysrooted configurations and when LIBPATH=":". 228if [ "x${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 241 fi 242fi 243 244LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 245 246# We need it for testsuite. 247set $EMULATION_LIBPATH 248if [ "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 252fi 253 254# 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.) 258# 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 $GENERATE_SHLIB_SCRIPT is set by the emulation 273# parameters too. 274 275if [ "x$SCRIPT_NAME" = "xelf" ]; then 276 GENERATE_COMBRELOC_SCRIPT=yes 277fi 278 279SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 280 281# Determine DATA_ALIGNMENT for the 5 variants, using 282# values specified in the emulparams/<script_to_run>.sh file or default. 283 284DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 285DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 286DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 287DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 288DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 289 290LD_FLAG=r 291DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 292DEFAULT_DATA_ALIGNMENT="ALIGN(${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/${EMULATION_NAME}.xr 297 298LD_FLAG=u 299DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 300CONSTRUCTING=" " 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/${EMULATION_NAME}.xu 305 306LD_FLAG= 307DATA_ALIGNMENT=${DATA_ALIGNMENT_} 308RELOCATING=" " 309( echo "/* Default linker script, for normal executables */" 310 . ${CUSTOMIZER_SCRIPT} 311 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 312) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 313 314LD_FLAG=n 315DATA_ALIGNMENT=${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/${EMULATION_NAME}.xn 320 321LD_FLAG=N 322DATA_ALIGNMENT=${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/${EMULATION_NAME}.xbn 327 328if test -n "$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 ${COMBRELOC} 345 COMBRELOC= 346 unset RELRO_NOW 347fi 348 349if test -n "$GENERATE_SHLIB_SCRIPT"; then 350 LD_FLAG=shared 351 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 352 CREATE_SHLIB=" " 353 ( 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 ${COMBRELOC} 375 COMBRELOC= 376 unset RELRO_NOW 377 fi 378 unset CREATE_SHLIB 379fi 380 381if test -n "$GENERATE_PIE_SCRIPT"; then 382 LD_FLAG=pie 383 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 384 CREATE_PIE=" " 385 ( 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 ${COMBRELOC} 407 COMBRELOC= 408 unset RELRO_NOW 409 fi 410 unset CREATE_PIE 411fi 412 413if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then 414 LD_FLAG=auto_import 415 DATA_ALIGNMENT=${DATA_ALIGNMENT_} 416 ( 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 421fi 422 423case " $EMULATION_LIBPATH " in 424 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 425esac 426 427# PR ld/5652: 428# Determine if the shell has support for the variable BASH_LINENO. 429# When it is the case, it is only available inside functions. 430has_lineno() 431{ 432 test "x$BASH_LINENO" != "x" 433} 434 435# Enable accruate error source in the compiler error messages, if possible. 436if has_lineno; then 437 . ${srcdir}/genscrba.sh 438else 439 source_em() 440 { 441 . $1 442 } 443 fragment() 444 { 445 cat >> e${EMULATION_NAME}.c 446 } 447fi 448 449# 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 453source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 454