1#!/bin/sh 2# genscripts.sh - generate the ld-emulation-target specific files 3# Copyright (C) 2004-2016 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# 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 92ENABLE_INITFINI_ARRAY=$2 93EMULATION_NAME=$3 94TOOL_LIB=$4 95 96# Include the emulation-specific parameters: 97CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${EMULATION_NAME}.sh" 98. ${CUSTOMIZER_SCRIPT} 99 100if test -d ldscripts; then 101 true 102else 103 mkdir ldscripts 104fi 105 106# Set some flags for the emultempl scripts. USE_LIBPATH will 107# be set for any libpath-using emulation; NATIVE will be set for a 108# libpath-using emulation where ${host} = ${target}. NATIVE 109# may already have been set by the emulparams file, but that's OK 110# (it'll just get set to "yes" twice). 111 112case " $EMULATION_LIBPATH " in 113 *" ${EMULATION_NAME} "*) 114 if [ "x${host}" = "x${target}" ] ; then 115 NATIVE=yes 116 USE_LIBPATH=yes 117 elif [ "x${use_sysroot}" = "xyes" ] ; then 118 USE_LIBPATH=yes 119 fi 120 ;; 121esac 122 123# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also. 124if test "x$NATIVE" = "xyes" ; then 125 USE_LIBPATH=yes 126fi 127 128# Set the library search path, for libraries named by -lfoo. 129# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 130# Otherwise, the default is set here. 131# 132# The format is the usual list of colon-separated directories. 133# To force a logically empty LIB_PATH, do LIBPATH=":". 134# 135# If we are using a sysroot, prefix library paths with "=" to indicate this. 136# 137# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of 138# the library path with the suffix applied. 139 140# Paths with LIBPATH_SUFFIX 141lib_path1= 142# Paths without LIBPATH_SUFFIX 143lib_path2= 144if [ "${LIB_PATH}" != ":" ] ; then 145 lib_path2=${LIB_PATH} 146fi 147 148# Add args to lib_path1 and lib_path2, discarding any duplicates 149append_to_lib_path() 150{ 151 if [ $# != 0 ]; then 152 for lib in "$@"; do 153 # The "=" is harmless if we aren't using a sysroot, but also needless. 154 if [ "x${use_sysroot}" = "xyes" ] ; then 155 lib="=${lib}" 156 fi 157 skip_lib=no 158 if test -n "${LIBPATH_SUFFIX}"; then 159 case "${lib}" in 160 *${LIBPATH_SUFFIX}) 161 case :${lib_path1}: in 162 *:${lib}:*) ;; 163 ::) lib_path1=${lib} ;; 164 *) lib_path1=${lib_path1}:${lib} ;; 165 esac ;; 166 *) 167 if test -n "${LIBPATH_SUFFIX_SKIP}"; then 168 case "${lib}" in 169 *${LIBPATH_SUFFIX_SKIP}) skip_lib=yes ;; 170 esac 171 fi 172 if test "${skip_lib}" = "no"; then 173 case :${lib_path1}: in 174 *:${lib}${LIBPATH_SUFFIX}:*) ;; 175 ::) lib_path1=${lib}${LIBPATH_SUFFIX} ;; 176 *) lib_path1=${lib_path1}:${lib}${LIBPATH_SUFFIX} ;; 177 esac 178 fi ;; 179 esac 180 fi 181 if test "${skip_lib}" = "no"; then 182 case :${lib_path1}:${lib_path2}: in 183 *:${lib}:*) ;; 184 *::) lib_path2=${lib} ;; 185 *) lib_path2=${lib_path2}:${lib} ;; 186 esac 187 fi 188 done 189 fi 190} 191 192# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib when native 193# except when LIBPATH=":". 194if [ "${LIB_PATH}" != ":" ] ; then 195 libs= 196 if [ "x${TOOL_LIB}" = "x" ] ; then 197 if [ "x${NATIVE}" = "xyes" ] ; then 198 libs="${exec_prefix}/${target_alias}/lib" 199 fi 200 else 201 # For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX} 202 # and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path, 203 # because 64bit libraries may be in both places, depending on 204 # cross-development setup method (e.g.: /usr/s390x-linux/lib64 205 # vs. /usr/s390-linux/lib64) 206 case "${NATIVE}:${LIBPATH_SUFFIX}:${TOOL_LIB}" in 207 :* | *::* | *:*:*${LIBPATH_SUFFIX}) ;; 208 *) libs="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" ;; 209 esac 210 libs="${exec_prefix}/${TOOL_LIB}/lib ${libs}" 211 fi 212 append_to_lib_path ${libs} 213fi 214 215if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then 216 libs=${NATIVE_LIB_DIRS} 217 if [ "x${NATIVE}" = "xyes" ] ; then 218 case " ${libs} " in 219 *" ${libdir} "*) ;; 220 *) libs="${libdir} ${libs}" ;; 221 esac 222 fi 223 append_to_lib_path ${libs} 224fi 225 226case :${lib_path1}:${lib_path2}: in 227 *:: | ::*) LIB_PATH=${lib_path1}${lib_path2} ;; 228 *) LIB_PATH=${lib_path1}:${lib_path2} ;; 229esac 230 231LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 232 233# We need it for testsuite. 234set $EMULATION_LIBPATH 235if [ "x$1" = "x$EMULATION_NAME" ]; then 236 test -d tmpdir || mkdir tmpdir 237 rm -f tmpdir/libpath.exp 238 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp 239fi 240 241# Generate 5 or 6 script files from a master script template in 242# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6 243# script files is actually used depends on command line options given 244# to ld. (SCRIPT_NAME was set in the emulparams_file.) 245# 246# A .x script file is the default script. 247# A .xr script is for linking without relocation (-r flag). 248# A .xu script is like .xr, but *do* create constructors (-Ur flag). 249# A .xn script is for linking with -n flag (mix text and data on same page). 250# A .xbn script is for linking with -N flag (mix text and data on same page). 251# A .xs script is for generating a shared library with the --shared 252# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the 253# emulation parameters. 254# A .xc script is for linking with -z combreloc; it is only generated if 255# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 256# $SCRIPT_NAME is "elf". 257# A .xsc script is for linking with --shared -z combreloc; it is generated 258# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 259# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation 260# parameters too. 261 262if [ "x$SCRIPT_NAME" = "xelf" ]; then 263 GENERATE_COMBRELOC_SCRIPT=yes 264fi 265 266SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 267 268# Determine DATA_ALIGNMENT for the 5 variants, using 269# values specified in the emulparams/<script_to_run>.sh file or default. 270 271DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 272DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 273DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 274DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 275DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 276 277LD_FLAG=r 278DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 279DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 280( echo "/* Script for ld -r: link without relocation */" 281 . ${CUSTOMIZER_SCRIPT} 282 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 283) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 284 285LD_FLAG=u 286DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 287CONSTRUCTING=" " 288( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 289 . ${CUSTOMIZER_SCRIPT} 290 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 291) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 292 293LD_FLAG= 294DATA_ALIGNMENT=${DATA_ALIGNMENT_} 295RELOCATING=" " 296( echo "/* Default linker script, for normal executables */" 297 . ${CUSTOMIZER_SCRIPT} 298 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 299) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 300 301LD_FLAG=n 302DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 303( echo "/* Script for -n: mix text and data on same page */" 304 . ${CUSTOMIZER_SCRIPT} 305 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 306) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 307 308LD_FLAG=N 309DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 310( echo "/* Script for -N: mix text and data on same page; don't align data */" 311 . ${CUSTOMIZER_SCRIPT} 312 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 313) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 314 315if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 316 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 317 LD_FLAG=c 318 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 319 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 320 . ${CUSTOMIZER_SCRIPT} 321 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 322 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 323 rm -f ${COMBRELOC} 324 LD_FLAG=w 325 RELRO_NOW=" " 326 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp 327 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */" 328 . ${CUSTOMIZER_SCRIPT} 329 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 330 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw 331 rm -f ${COMBRELOC} 332 COMBRELOC= 333 unset RELRO_NOW 334fi 335 336if test -n "$GENERATE_SHLIB_SCRIPT"; then 337 LD_FLAG=shared 338 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 339 CREATE_SHLIB=" " 340 ( 341 echo "/* Script for ld --shared: link shared library */" 342 . ${CUSTOMIZER_SCRIPT} 343 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 344 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 345 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 346 LD_FLAG=cshared 347 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 348 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp 349 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 350 . ${CUSTOMIZER_SCRIPT} 351 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 352 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 353 rm -f ${COMBRELOC} 354 LD_FLAG=wshared 355 RELRO_NOW=" " 356 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp 357 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */" 358 . ${CUSTOMIZER_SCRIPT} 359 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 360 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw 361 rm -f ${COMBRELOC} 362 COMBRELOC= 363 unset RELRO_NOW 364 fi 365 unset CREATE_SHLIB 366fi 367 368if test -n "$GENERATE_PIE_SCRIPT"; then 369 LD_FLAG=pie 370 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 371 CREATE_PIE=" " 372 ( 373 echo "/* Script for ld -pie: link position independent executable */" 374 . ${CUSTOMIZER_SCRIPT} 375 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 376 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 377 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 378 LD_FLAG=cpie 379 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 380 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp 381 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 382 . ${CUSTOMIZER_SCRIPT} 383 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 384 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 385 rm -f ${COMBRELOC} 386 LD_FLAG=wpie 387 RELRO_NOW=" " 388 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp 389 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */" 390 . ${CUSTOMIZER_SCRIPT} 391 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 392 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw 393 rm -f ${COMBRELOC} 394 COMBRELOC= 395 unset RELRO_NOW 396 fi 397 unset CREATE_PIE 398fi 399 400if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then 401 LD_FLAG=auto_import 402 DATA_ALIGNMENT=${DATA_ALIGNMENT_} 403 ( 404 echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */" 405 . ${CUSTOMIZER_SCRIPT} 406 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 407 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa 408fi 409 410case "$COMPILE_IN: $EMULATION_LIBPATH " in 411 :*" ${EMULATION_NAME} "*) COMPILE_IN=yes;; 412esac 413 414# PR ld/5652: 415# Determine if the shell has support for the variable BASH_LINENO. 416# When it is the case, it is only available inside functions. 417has_lineno() 418{ 419 test "x$BASH_LINENO" != "x" 420} 421 422# Enable accruate error source in the compiler error messages, if possible. 423if has_lineno; then 424 . ${srcdir}/genscrba.sh 425else 426 source_em() 427 { 428 . $1 429 } 430 fragment() 431 { 432 cat >> e${EMULATION_NAME}.c 433 } 434fi 435 436# Generate e${EMULATION_NAME}.c. 437# Start with an empty file, then the sourced .em script 438# can use the "fragment" function to append. 439> e${EMULATION_NAME}.c 440source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 441