1#!/bin/sh 2# genscripts.sh - generate the ld-emulation-target specific files 3# 4# Usage: genscripts.sh srcdir libdir host target target_alias \ 5# default_emulation native_lib_dirs this_emulation 6# 7# Sample usage: 8# genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 \ 9# sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 "" sun3 sparc-sun-sunos4.1.3 10# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c 11# 12# $FreeBSD: releng/11.0/gnu/usr.bin/binutils/ld/genscripts.sh 289410 2015-10-16 05:54:41Z bdrewery $ 13# 14# This is a cut-down version of the GNU script. Instead of jumping through 15# hoops for all possible combinations of paths, just use the libdir 16# argument in place of LIB_PATH. 17# 18# The exec_prefix, target_alias, use_sysroot, NATIVE_LIB_DIRS, TOOL_LIB, CUSTOMIZER_SCRIPT 19# arguments are not used in this version. 20# 21 22srcdir=$1 23libdir=$2 24exec_prefix=$3 25host=$4 26target=$5 27target_alias=$6 28EMULATION_LIBPATH=$7 29NATIVE_LIB_DIRS=$8 30use_sysroot=$9 31shift 9 32EMULATION_NAME=$1 33TOOL_LIB=$2 34CUSTOMIZER_SCRIPT=$3 35 36# Create the 'CUSTOMIZER_SCRIPT' knob to better sync this script with 37# FSF BU ver 2.15 which allows for a more generic emulparams processing. 38# To reduce the diff, I also include the ${EMULATION_NAME} parameter in uses 39# of 'CUSTOMIZER_SCRIPT'. 40 41# XXX: arm hack : until those file are merged back into the FSF repo, just 42# use the version in this directory. 43if !(test -f ${CUSTOMIZER_SCRIPT}"";) then 44CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${EMULATION_NAME}.sh" 45fi 46 47# Include the emulation-specific parameters: 48. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 49 50if test -d ldscripts; then 51 true 52else 53 mkdir -p ldscripts 54fi 55 56# Set some flags for the emultempl scripts. USE_LIBPATH will 57# be set for any libpath-using emulation; NATIVE will be set for a 58# emulation to enable 'LD_LIBRARY_PATH=/foo:/bar ld -lfooz' 59 if [ "x${host}" = "x${target}" ] ; then 60 NATIVE=yes 61 fi 62 USE_LIBPATH=yes 63 64# Set the library search path, for libraries named by -lfoo. 65# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 66# Otherwise, the default is set here. 67# 68# The format is the usual list of colon-separated directories. 69# To force a logically empty LIB_PATH, do LIBPATH=":". 70 71LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'` 72 73# Generate 5 or 6 script files from a master script template in 74# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6 75# script files is actually used depends on command line options given 76# to ld. (SCRIPT_NAME was set in the emulparams_file.) 77# 78# A .x script file is the default script. 79# A .xr script is for linking without relocation (-r flag). 80# A .xu script is like .xr, but *do* create constructors (-Ur flag). 81# A .xn script is for linking with -n flag (mix text and data on same page). 82# A .xbn script is for linking with -N flag (mix text and data on same page). 83# A .xs script is for generating a shared library with the --shared 84# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the 85# emulation parameters. 86# A .xc script is for linking with -z combreloc; it is only generated if 87# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 88# $SCRIPT_NAME is "elf". 89# A .xsc script is for linking with --shared -z combreloc; it is generated 90# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 91# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation 92# parameters too. 93 94if [ "x$SCRIPT_NAME" = "xelf" ]; then 95 GENERATE_COMBRELOC_SCRIPT=yes 96fi 97 98SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 99 100# Determine DATA_ALIGNMENT for the 5 variants, using 101# values specified in the emulparams/<script_to_run>.sh file or default. 102 103DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 104DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 105DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 106DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 107DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 108 109LD_FLAG=r 110DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 111DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 112( echo "/* Script for ld -r: link without relocation */" 113 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 114 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 115) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 116 117LD_FLAG=u 118DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 119CONSTRUCTING=" " 120( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 121 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 122 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 123) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 124 125LD_FLAG= 126DATA_ALIGNMENT=${DATA_ALIGNMENT_} 127RELOCATING=" " 128( echo "/* Default linker script, for normal executables */" 129 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 130 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 131) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 132 133LD_FLAG=n 134DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 135TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}} 136( echo "/* Script for -n: mix text and data on same page */" 137 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 138 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 139) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 140 141LD_FLAG=N 142DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 143( echo "/* Script for -N: mix text and data on same page; don't align data */" 144 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 145 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 146) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 147 148if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 149 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 150 LD_FLAG=c 151 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 152 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 153 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 154 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 155 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 156 rm -f ${COMBRELOC} 157 LD_FLAG=w 158 RELRO_NOW=" " 159 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp 160 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */" 161 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 162 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 163 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw 164 rm -f ${COMBRELOC} 165 COMBRELOC= 166 unset RELRO_NOW 167fi 168 169if test -n "$GENERATE_SHLIB_SCRIPT"; then 170 LD_FLAG=shared 171 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 172 CREATE_SHLIB=" " 173 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 174 ( 175 echo "/* Script for ld --shared: link shared library */" 176 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 177 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 178 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 179 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 180 LD_FLAG=cshared 181 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 182 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp 183 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 184 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 185 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 186 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 187 rm -f ${COMBRELOC} 188 LD_FLAG=wshared 189 RELRO_NOW=" " 190 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp 191 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */" 192 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 193 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 194 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw 195 rm -f ${COMBRELOC} 196 COMBRELOC= 197 unset RELRO_NOW 198 fi 199 unset CREATE_SHLIB 200fi 201 202if test -n "$GENERATE_PIE_SCRIPT"; then 203 LD_FLAG=pie 204 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 205 CREATE_PIE=" " 206 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 207 ( 208 echo "/* Script for ld -pie: link position independent executable */" 209 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 210 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 211 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 212 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 213 LD_FLAG=cpie 214 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 215 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp 216 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 217 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 218 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 219 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 220 rm -f ${COMBRELOC} 221 LD_FLAG=wpie 222 RELRO_NOW=" " 223 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp 224 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */" 225 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 226 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 227 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw 228 rm -f ${COMBRELOC} 229 COMBRELOC= 230 unset RELRO_NOW 231 fi 232 unset CREATE_PIE 233fi 234 235case " $EMULATION_LIBPATH " in 236 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 237esac 238 239# Generate e${EMULATION_NAME}.c. 240. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 241