1 #!/bin/sh 2 # genscripts.sh - generate the ld-emulation-target specific files 3 # Copyright (C) 2004-2014 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 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 ENABLE_INITFINI_ARRAY=$2 93 EMULATION_NAME=$3 94 TOOL_LIB=$4 95 96 # Include the emulation-specific parameters: 97 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${EMULATION_NAME}.sh" 98 . ${CUSTOMIZER_SCRIPT} 99 100 if test -d ldscripts; then 101 true 102 else 103 mkdir ldscripts 104 fi 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). 111 112 case " $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 ;; 121 esac 122 123 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also. 124 if test "x$NATIVE" = "xyes" ; then 125 USE_LIBPATH=yes 126 fi 127 128 # Set the library search path, for libraries named by -lfoo. 129 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 130 # Otherwise, the default is set here. 131 # 132 # The format is the usual list of colon-separated directories. 133 # To force a logically empty LIB_PATH, do LIBPATH=":". 134 # 135 # If we are using a sysroot, prefix library paths with "=" to indicate this. 136 # 137 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of 138 # the library path with the suffix applied. 139 140 # Paths with LIBPATH_SUFFIX 141 lib_path1= 142 # Paths without LIBPATH_SUFFIX 143 lib_path2= 144 if [ "${LIB_PATH}" != ":" ] ; then 145 lib_path2=${LIB_PATH} 146 fi 147 148 # Return 0 if this is building for ChromeOS target. 149 # Currently ChromeOS targets and Android targets do not intersect. 150 is_chromeos_target() 151 { 152 for t in \ 153 arm-none-eabi \ 154 armv7a-cros-linux-gnueabi \ 155 i686-pc-linux-gnu \ 156 x86_64-cros-linux-gnu \ 157 x86_64-pc-linux-gnu ; 158 do 159 if [[ "$1" == "${t}" ]]; then 160 return 0 161 fi 162 done 163 return 1 164 } 165 166 # Add args to lib_path1 and lib_path2, discarding any duplicates 167 append_to_lib_path() 168 { 169 if [ $# != 0 ]; then 170 for lib in "$@"; do 171 # The "=" is harmless if we aren't using a sysroot, but also needless. 172 if [ "x${use_sysroot}" = "xyes" ] ; then 173 lib="=${lib}" 174 fi 175 skip_lib=no 176 if test -n "${LIBPATH_SUFFIX}"; then 177 case "${lib}" in 178 *${LIBPATH_SUFFIX}) 179 case :${lib_path1}: in 180 *:${lib}:*) ;; 181 ::) lib_path1=${lib} ;; 182 *) lib_path1=${lib_path1}:${lib} ;; 183 esac ;; 184 *) 185 if test -n "${LIBPATH_SUFFIX_SKIP}"; then 186 case "${lib}" in 187 *${LIBPATH_SUFFIX_SKIP}) skip_lib=yes ;; 188 esac 189 fi 190 if test "${skip_lib}" = "no"; then 191 case :${lib_path1}: in 192 *:${lib}${LIBPATH_SUFFIX}:*) ;; 193 ::) lib_path1=${lib}${LIBPATH_SUFFIX} ;; 194 *) lib_path1=${lib_path1}:${lib}${LIBPATH_SUFFIX} ;; 195 esac 196 fi ;; 197 esac 198 fi 199 if test "${skip_lib}" = "no"; then 200 case :${lib_path1}:${lib_path2}: in 201 *:${lib}:*) ;; 202 *::) lib_path2=${lib} ;; 203 *) lib_path2=${lib_path2}:${lib} ;; 204 esac 205 fi 206 done 207 fi 208 } 209 210 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib when native 211 # except when LIBPATH=":". 212 if [ "${LIB_PATH}" != ":" ] ; then 213 libs= 214 if [ "x${TOOL_LIB}" = "x" ] ; then 215 if [ "x${NATIVE}" = "xyes" ] ; then 216 libs="${exec_prefix}/${target_alias}/lib" 217 fi 218 else 219 # For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX} 220 # and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path, 221 # because 64bit libraries may be in both places, depending on 222 # cross-development setup method (e.g.: /usr/s390x-linux/lib64 223 # vs. /usr/s390-linux/lib64) 224 case "${NATIVE}:${LIBPATH_SUFFIX}:${TOOL_LIB}" in 225 :* | *::* | *:*:*${LIBPATH_SUFFIX}) ;; 226 *) libs="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" ;; 227 esac 228 libs="${exec_prefix}/${TOOL_LIB}/lib ${libs}" 229 fi 230 append_to_lib_path ${libs} 231 fi 232 233 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then 234 libs=${NATIVE_LIB_DIRS} 235 if [ "x${NATIVE}" = "xyes" ] ; then 236 case " ${libs} " in 237 *" ${libdir} "*) ;; 238 *) libs="${libdir} ${libs}" ;; 239 esac 240 fi 241 append_to_lib_path ${libs} 242 fi 243 244 case :${lib_path1}:${lib_path2}: in 245 *:: | ::*) LIB_PATH=${lib_path1}${lib_path2} ;; 246 *) LIB_PATH=${lib_path1}:${lib_path2} ;; 247 esac 248 249 if is_chromeos_target ${target}; then 250 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 251 fi 252 253 # For Android, comment out LIB_SEARCH_DIRS. 254 #LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 255 256 # We need it for testsuite. 257 set $EMULATION_LIBPATH 258 if [ "x$1" = "x$EMULATION_NAME" ]; then 259 test -d tmpdir || mkdir tmpdir 260 rm -f tmpdir/libpath.exp 261 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp 262 fi 263 264 # Generate 5 or 6 script files from a master script template in 265 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6 266 # script files is actually used depends on command line options given 267 # to ld. (SCRIPT_NAME was set in the emulparams_file.) 268 # 269 # A .x script file is the default script. 270 # A .xr script is for linking without relocation (-r flag). 271 # A .xu script is like .xr, but *do* create constructors (-Ur flag). 272 # A .xn script is for linking with -n flag (mix text and data on same page). 273 # A .xbn script is for linking with -N flag (mix text and data on same page). 274 # A .xs script is for generating a shared library with the --shared 275 # flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the 276 # emulation parameters. 277 # A .xc script is for linking with -z combreloc; it is only generated if 278 # $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 279 # $SCRIPT_NAME is "elf". 280 # A .xsc script is for linking with --shared -z combreloc; it is generated 281 # if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 282 # $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation 283 # parameters too. 284 285 if [ "x$SCRIPT_NAME" = "xelf" ]; then 286 GENERATE_COMBRELOC_SCRIPT=yes 287 fi 288 289 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 290 291 # Determine DATA_ALIGNMENT for the 5 variants, using 292 # values specified in the emulparams/<script_to_run>.sh file or default. 293 294 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 295 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 296 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 297 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 298 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 299 300 LD_FLAG=r 301 DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 302 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 303 ( echo "/* Script for ld -r: link without relocation */" 304 . ${CUSTOMIZER_SCRIPT} 305 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 306 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 307 308 LD_FLAG=u 309 DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 310 CONSTRUCTING=" " 311 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 312 . ${CUSTOMIZER_SCRIPT} 313 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 314 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 315 316 LD_FLAG= 317 DATA_ALIGNMENT=${DATA_ALIGNMENT_} 318 RELOCATING=" " 319 ( echo "/* Default linker script, for normal executables */" 320 if ! is_chromeos_target ${target}; then 321 echo "/* Modified for Android. */" 322 fi 323 . ${CUSTOMIZER_SCRIPT} 324 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 325 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 326 327 LD_FLAG=n 328 DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 329 ( echo "/* Script for -n: mix text and data on same page */" 330 . ${CUSTOMIZER_SCRIPT} 331 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 332 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 333 334 LD_FLAG=N 335 DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 336 ( echo "/* Script for -N: mix text and data on same page; don't align data */" 337 . ${CUSTOMIZER_SCRIPT} 338 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 339 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 340 341 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 342 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 343 LD_FLAG=c 344 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 345 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 346 . ${CUSTOMIZER_SCRIPT} 347 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 348 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 349 rm -f ${COMBRELOC} 350 LD_FLAG=w 351 RELRO_NOW=" " 352 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp 353 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */" 354 . ${CUSTOMIZER_SCRIPT} 355 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 356 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw 357 rm -f ${COMBRELOC} 358 COMBRELOC= 359 unset RELRO_NOW 360 fi 361 362 if test -n "$GENERATE_SHLIB_SCRIPT"; then 363 LD_FLAG=shared 364 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 365 CREATE_SHLIB=" " 366 ( 367 echo "/* Script for ld --shared: link shared library */" 368 . ${CUSTOMIZER_SCRIPT} 369 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 370 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 371 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 372 LD_FLAG=cshared 373 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 374 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp 375 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 376 if ! is_chromeos_target ${target}; then 377 echo "/* Modified for Android. */" 378 fi 379 . ${CUSTOMIZER_SCRIPT} 380 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 381 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 382 rm -f ${COMBRELOC} 383 LD_FLAG=wshared 384 RELRO_NOW=" " 385 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp 386 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */" 387 . ${CUSTOMIZER_SCRIPT} 388 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 389 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw 390 rm -f ${COMBRELOC} 391 COMBRELOC= 392 unset RELRO_NOW 393 fi 394 unset CREATE_SHLIB 395 fi 396 397 if test -n "$GENERATE_PIE_SCRIPT"; then 398 LD_FLAG=pie 399 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 400 CREATE_PIE=" " 401 ( 402 echo "/* Script for ld -pie: link position independent executable */" 403 . ${CUSTOMIZER_SCRIPT} 404 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 405 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 406 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 407 LD_FLAG=cpie 408 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 409 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp 410 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 411 . ${CUSTOMIZER_SCRIPT} 412 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 413 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 414 rm -f ${COMBRELOC} 415 LD_FLAG=wpie 416 RELRO_NOW=" " 417 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp 418 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */" 419 . ${CUSTOMIZER_SCRIPT} 420 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 421 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw 422 rm -f ${COMBRELOC} 423 COMBRELOC= 424 unset RELRO_NOW 425 fi 426 unset CREATE_PIE 427 fi 428 429 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then 430 LD_FLAG=auto_import 431 DATA_ALIGNMENT=${DATA_ALIGNMENT_} 432 ( 433 echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */" 434 . ${CUSTOMIZER_SCRIPT} 435 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 436 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa 437 fi 438 439 case "$COMPILE_IN: $EMULATION_LIBPATH " in 440 :*" ${EMULATION_NAME} "*) COMPILE_IN=yes;; 441 esac 442 443 # PR ld/5652: 444 # Determine if the shell has support for the variable BASH_LINENO. 445 # When it is the case, it is only available inside functions. 446 has_lineno() 447 { 448 test "x$BASH_LINENO" != "x" 449 } 450 451 # Enable accruate error source in the compiler error messages, if possible. 452 if has_lineno; then 453 . ${srcdir}/genscrba.sh 454 else 455 source_em() 456 { 457 . $1 458 } 459 fragment() 460 { 461 cat >> e${EMULATION_NAME}.c 462 } 463 fi 464 465 # Generate e${EMULATION_NAME}.c. 466 # Start with an empty file, then the sourced .em script 467 # can use the "fragment" function to append. 468 > e${EMULATION_NAME}.c 469 source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 470
