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# this_emulation \ 34# optional: 35# tool_dir \ 36# customizer_script 37# 38# Sample usage: 39# 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 54# 55# produces the linker scripts: 56# 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"] 67# 68# It also produced the C source file: 69# 70# em_sun3.c 71# 72# which is then compiled into the linker. 73# 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. 79 80 81srcdir=$1 82libdir=$2 83prefix=$3 84exec_prefix=$4 85host=$5 86target=$6 87target_alias=$7 88EMULATION_LIBPATH=$8 89NATIVE_LIB_DIRS=$9 90shift 9 91use_sysroot=$1 92EMULATION_NAME=$2 93TOOL_LIB=$3 94CUSTOMIZER_SCRIPT=$4 95 96# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug. 97if [ "x${TOOL_LIB}" = "x" ] ; then 98 tool_lib=${exec_prefix}/${target_alias}/lib 99else 100 tool_lib=${exec_prefix}/${TOOL_LIB}/lib 101fi 102 103if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then 104 CUSTOMIZER_SCRIPT=${EMULATION_NAME} 105fi 106CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh" 107 108# Include the emulation-specific parameters: 109. ${CUSTOMIZER_SCRIPT} 110 111if test -d ldscripts; then 112 true 113else 114 mkdir ldscripts 115fi 116 117# 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). 122 123case " $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 130 fi 131 ;; 132esac 133 134# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also. 135if test "x$NATIVE" = "xyes" ; then 136 USE_LIBPATH=yes 137fi 138 139# Set the library search path, for libraries named by -lfoo. 140# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 141# Otherwise, the default is set here. 142# 143# The format is the usual list of colon-separated directories. 144# To force a logically empty LIB_PATH, do LIBPATH=":". 145# 146# If we are using a sysroot, prefix library paths with "=" to indicate this. 147# 148# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of 149# the library path with the suffix applied. 150 151if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then 152 LIB_PATH2= 153 154 libs=${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 164 fi 165 166 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="=${lib}" 170 fi 171 addsuffix= 172 case "${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 194 fi 195 done 196 197 case :${LIB_PATH}:${LIB_PATH2}: in 198 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;; 199 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;; 200 esac 201 202 # 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 *:*${LIBPATH_SUFFIX}) ;; 209 *) 210 paths="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" 211 if [ x"${TOOL_LIB}" != x ]; then 212 paths="${paths} ${exec_prefix}/${TOOL_LIB}/lib${LIBPATH_SUFFIX}" 213 fi 214 for path in $paths; do 215 case :${LIB_PATH}: in 216 ::: | *:${path}:*) ;; 217 *) LIB_PATH=${path}:${LIB_PATH} ;; 218 esac 219 done 220 ;; 221 esac 222fi 223 224# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for 225# sysrooted configurations and when LIBPATH=":". 226if [ "x${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 239 fi 240fi 241 242LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 243 244# We need it for testsuite. 245set $EMULATION_LIBPATH 246if [ "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 250fi 251 252# 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.) 256# 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 $GENERATE_SHLIB_SCRIPT is set by the emulation 271# parameters too. 272 273if [ "x$SCRIPT_NAME" = "xelf" ]; then 274 GENERATE_COMBRELOC_SCRIPT=yes 275fi 276 277SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 278 279# Determine DATA_ALIGNMENT for the 5 variants, using 280# values specified in the emulparams/<script_to_run>.sh file or default. 281 282DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 283DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 284DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 285DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 286DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 287 288LD_FLAG=r 289DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 290DEFAULT_DATA_ALIGNMENT="ALIGN(${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/${EMULATION_NAME}.xr 295 296LD_FLAG=u 297DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 298CONSTRUCTING=" " 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/${EMULATION_NAME}.xu 303 304LD_FLAG= 305DATA_ALIGNMENT=${DATA_ALIGNMENT_} 306RELOCATING=" " 307( echo "/* Default linker script, for normal executables */" 308 . ${CUSTOMIZER_SCRIPT} 309 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 310) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 311 312LD_FLAG=n 313DATA_ALIGNMENT=${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/${EMULATION_NAME}.xn 318 319LD_FLAG=N 320DATA_ALIGNMENT=${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/${EMULATION_NAME}.xbn 325 326if test -n "$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 ${COMBRELOC} 343 COMBRELOC= 344 unset RELRO_NOW 345fi 346 347if test -n "$GENERATE_SHLIB_SCRIPT"; then 348 LD_FLAG=shared 349 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 350 CREATE_SHLIB=" " 351 ( 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 ${COMBRELOC} 373 COMBRELOC= 374 unset RELRO_NOW 375 fi 376 unset CREATE_SHLIB 377fi 378 379if test -n "$GENERATE_PIE_SCRIPT"; then 380 LD_FLAG=pie 381 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 382 CREATE_PIE=" " 383 ( 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 ${COMBRELOC} 405 COMBRELOC= 406 unset RELRO_NOW 407 fi 408 unset CREATE_PIE 409fi 410 411if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then 412 LD_FLAG=auto_import 413 DATA_ALIGNMENT=${DATA_ALIGNMENT_} 414 ( 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 419fi 420 421case " $EMULATION_LIBPATH " in 422 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 423esac 424 425# PR ld/5652: 426# Determine if the shell has support for the variable BASH_LINENO. 427# When it is the case, it is only available inside functions. 428has_lineno() 429{ 430 test "x$BASH_LINENO" != "x" 431} 432 433# Enable accruate error source in the compiler error messages, if possible. 434if has_lineno; then 435 . ${srcdir}/genscrba.sh 436else 437 source_em() 438 { 439 . $1 440 } 441 fragment() 442 { 443 cat >> e${EMULATION_NAME}.c 444 } 445fi 446 447# 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 451source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 452