1#!/bin/sh 2# genscripts.sh - generate the ld-emulation-target specific files 3# 4# Usage: genscripts_extra.sh \ 5# srcdir \ 6# libdir \ 7# prefix \ 8# exec_prefix \ 9# host \ 10# target \ 11# target_alias \ 12# default_emulation \ 13# native_lib_dirs \ 14# use_sysroot \ 15# this_emulation \ 16# optional: 17# tool_dir \ 18# customizer_script 19# 20# Sample usage: 21# 22# genscripts_extra.sh \ 23# /sources/ld \ 24# /usr/local/lib \ 25# /usr/local \ 26# /usr/local \ 27# sparc-sun-sunos4.1.3 \ 28# sparc-sun-sunos4.1.3 \ 29# sparc-sun-sunos4.1.3 \ 30# sun4 \ 31# "" \ 32# no \ 33# sun3 \ 34# sparc-sun-sunos4.1.3 \ 35# sparc.sh 36# 37# produces the linker scripts: 38# 39# sun3.x [default linker script] 40# sun3.xbn [used when the linker is invoked with "-N"] 41# sun3.xn [used when the linker is invoked with "-n"] 42# sun3.xr [used when the linker is invoked with "-r"] 43# sun3.xu [used when the linker is invoked with "-Ur"] 44# and maybe: 45# sun3.xc [used when the linker is invoked with "-z combreloc"] 46# sun3.xsc [used when the linker is invoked with "--shared"] 47# sun3.xdc [used when the linker is invoked with "-pie"] 48# 49# It also produced the C source file: 50# 51# em_sun3.c 52# 53# which is then compiled into the linker. 54# 55# The linker scripts are created by running the shell script 56# /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME} 57# (and any other variables it wants to). ${SCRIPT_NAME} is then 58# invoked with a variable called ${LD_FLAG} to tell it which version 59# of the linker script to create. 60 61 62srcdir=$1 63libdir=$2 64prefix=$3 65exec_prefix=$4 66host=$5 67target=$6 68target_alias=$7 69EMULATION_LIBPATH=$8 70NATIVE_LIB_DIRS=$9 71shift 9 72use_sysroot=$1 73EMULATION_NAME=$2 74TOOL_LIB=$3 75CUSTOMIZER_SCRIPT=$4 76 77# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug. 78if [ "x${TOOL_LIB}" = "x" ] ; then 79 tool_lib=${exec_prefix}/${target_alias}/lib 80else 81 tool_lib=${exec_prefix}/${TOOL_LIB}/lib 82fi 83 84if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then 85 CUSTOMIZER_SCRIPT=${EMULATION_NAME} 86fi 87CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh" 88 89# Include the emulation-specific parameters: 90. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 91 92if test -d ldscripts; then 93 true 94else 95 mkdir ldscripts 96fi 97 98# Set some flags for the emultempl scripts. USE_LIBPATH will 99# be set for any libpath-using emulation; NATIVE will be set for a 100# libpath-using emulation where ${host} = ${target}. NATIVE 101# may already have been set by the emulparams file, but that's OK 102# (it'll just get set to "yes" twice). 103 104case " $EMULATION_LIBPATH " in 105 *" ${EMULATION_NAME} "*) 106 if [ "x${host}" = "x${target}" ] ; then 107 NATIVE=yes 108 USE_LIBPATH=yes 109 elif [ "x${use_sysroot}" = "xyes" ] ; then 110 USE_LIBPATH=yes 111 fi 112 ;; 113esac 114 115# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also. 116if test "x$NATIVE" = "xyes" ; then 117 USE_LIBPATH=yes 118fi 119 120# Set the library search path, for libraries named by -lfoo. 121# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 122# Otherwise, the default is set here. 123# 124# The format is the usual list of colon-separated directories. 125# To force a logically empty LIB_PATH, do LIBPATH=":". 126# 127# If we are using a sysroot, prefix library paths with "=" to indicate this. 128# 129# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of 130# the library path with the suffix applied. 131 132if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then 133 LIB_PATH2= 134 135 libs=${NATIVE_LIB_DIRS} 136 if [ "x${use_sysroot}" != "xyes" ] ; then 137 case " ${libs} " in 138 *" ${libdir} "*) ;; 139 *) libs="${libdir} ${libs}" ;; 140 esac 141 case " ${libs} " in 142 *" ${tool_lib} "*) ;; 143 *) libs="${tool_lib} ${libs}" ;; 144 esac 145 fi 146 147 for lib in ${libs}; do 148 # The "=" is harmless if we aren't using a sysroot, but also needless. 149 if [ "x${use_sysroot}" = "xyes" ] ; then 150 lib="=${lib}" 151 fi 152 addsuffix= 153 case "${LIBPATH_SUFFIX}:${lib}" in 154 :*) ;; 155 *:*${LIBPATH_SUFFIX}) ;; 156 *) addsuffix=yes ;; 157 esac 158 if test -n "$addsuffix"; then 159 case :${LIB_PATH}: in 160 *:${lib}${LIBPATH_SUFFIX}:*) ;; 161 ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;; 162 *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;; 163 esac 164 case :${LIB_PATH}:${LIB_PATH2}: in 165 *:${lib}:*) ;; 166 *::) LIB_PATH2=${lib} ;; 167 *) LIB_PATH2=${LIB_PATH2}:${lib} ;; 168 esac 169 else 170 case :${LIB_PATH2}: in 171 *:${lib}:*) ;; 172 ::) LIB_PATH2=${lib} ;; 173 *) LIB_PATH2=${LIB_PATH2}:${lib} ;; 174 esac 175 fi 176 done 177 178 case :${LIB_PATH}:${LIB_PATH2}: in 179 *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;; 180 *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;; 181 esac 182fi 183 184# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for 185# sysrooted configurations and when LIBPATH=":". 186if [ "x${use_sysroot}" != "xyes" ] ; then 187 case :${LIB_PATH}: in 188 ::: | *:${tool_lib}:*) ;; 189 ::) LIB_PATH=${tool_lib} ;; 190 *) LIB_PATH=${tool_lib}:${LIB_PATH} ;; 191 esac 192 # For multilib targets, search both $tool_lib dirs 193 if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then 194 case :${LIB_PATH}: in 195 ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;; 196 ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;; 197 *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;; 198 esac 199 fi 200fi 201 202LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'` 203 204# We need it for testsuite. 205set $EMULATION_LIBPATH 206if [ "x$1" = "x$EMULATION_NAME" ]; then 207 test -d tmpdir || mkdir tmpdir 208 rm -f tmpdir/libpath.exp 209 echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp 210fi 211 212# Generate 5 or 6 script files from a master script template in 213# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6 214# script files is actually used depends on command line options given 215# to ld. (SCRIPT_NAME was set in the emulparams_file.) 216# 217# A .x script file is the default script. 218# A .xr script is for linking without relocation (-r flag). 219# A .xu script is like .xr, but *do* create constructors (-Ur flag). 220# A .xn script is for linking with -n flag (mix text and data on same page). 221# A .xbn script is for linking with -N flag (mix text and data on same page). 222# A .xs script is for generating a shared library with the --shared 223# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the 224# emulation parameters. 225# A .xc script is for linking with -z combreloc; it is only generated if 226# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 227# $SCRIPT_NAME is "elf". 228# A .xsc script is for linking with --shared -z combreloc; it is generated 229# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 230# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation 231# parameters too. 232 233if [ "x$SCRIPT_NAME" = "xelf" ]; then 234 GENERATE_COMBRELOC_SCRIPT=yes 235fi 236 237SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 238 239# Determine DATA_ALIGNMENT for the 5 variants, using 240# values specified in the emulparams/<script_to_run>.sh file or default. 241 242DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 243DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 244DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 245DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 246DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 247 248LD_FLAG=r 249DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 250DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 251( echo "/* Script for ld -r: link without relocation */" 252 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 253 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 254) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 255 256LD_FLAG=u 257DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 258CONSTRUCTING=" " 259( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 260 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 261 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 262) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 263 264LD_FLAG= 265DATA_ALIGNMENT=${DATA_ALIGNMENT_} 266RELOCATING=" " 267( echo "/* Default linker script, for normal executables */" 268 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 269 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 270) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 271 272LD_FLAG=n 273DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 274TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}} 275( echo "/* Script for -n: mix text and data on same page */" 276 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 277 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 278) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 279 280LD_FLAG=N 281DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 282( echo "/* Script for -N: mix text and data on same page; don't align data */" 283 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 284 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 285) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 286 287if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 288 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 289 LD_FLAG=c 290 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 291 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 292 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 293 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 294 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 295 rm -f ${COMBRELOC} 296 LD_FLAG=w 297 RELRO_NOW=" " 298 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp 299 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */" 300 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 301 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 302 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw 303 rm -f ${COMBRELOC} 304 COMBRELOC= 305 unset RELRO_NOW 306fi 307 308if test -n "$GENERATE_SHLIB_SCRIPT"; then 309 LD_FLAG=shared 310 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 311 CREATE_SHLIB=" " 312 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 313 ( 314 echo "/* Script for ld --shared: link shared library */" 315 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 316 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 317 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 318 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 319 LD_FLAG=cshared 320 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 321 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp 322 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 323 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 324 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 325 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 326 rm -f ${COMBRELOC} 327 LD_FLAG=wshared 328 RELRO_NOW=" " 329 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp 330 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */" 331 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 332 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 333 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw 334 rm -f ${COMBRELOC} 335 COMBRELOC= 336 unset RELRO_NOW 337 fi 338 unset CREATE_SHLIB 339fi 340 341if test -n "$GENERATE_PIE_SCRIPT"; then 342 LD_FLAG=pie 343 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 344 CREATE_PIE=" " 345 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 346 ( 347 echo "/* Script for ld -pie: link position independent executable */" 348 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 349 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 350 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 351 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 352 LD_FLAG=cpie 353 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 354 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp 355 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 356 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 357 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 358 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 359 rm -f ${COMBRELOC} 360 LD_FLAG=wpie 361 RELRO_NOW=" " 362 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp 363 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */" 364 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 365 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 366 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw 367 rm -f ${COMBRELOC} 368 COMBRELOC= 369 unset RELRO_NOW 370 fi 371 unset CREATE_PIE 372fi 373 374case " $EMULATION_LIBPATH " in 375 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 376esac 377 378# Generate e${EMULATION_NAME}.c. 379. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 380