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/10.2/gnu/usr.bin/binutils/ld/genscripts.sh 218822 2011-02-18 20:54:12Z dim $ 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} ${EMULATION_NAME} 49 50if test -d ldscripts; then 51 true 52else 53 rm -f ldscripts 54 mkdir ldscripts 55fi 56 57# Set some flags for the emultempl scripts. USE_LIBPATH will 58# be set for any libpath-using emulation; NATIVE will be set for a 59# emulation to enable 'LD_LIBRARY_PATH=/foo:/bar ld -lfooz' 60 if [ "x${host}" = "x${target}" ] ; then 61 NATIVE=yes 62 fi 63 USE_LIBPATH=yes 64 65# Set the library search path, for libraries named by -lfoo. 66# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. 67# Otherwise, the default is set here. 68# 69# The format is the usual list of colon-separated directories. 70# To force a logically empty LIB_PATH, do LIBPATH=":". 71 72LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'` 73 74# Generate 5 or 6 script files from a master script template in 75# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6 76# script files is actually used depends on command line options given 77# to ld. (SCRIPT_NAME was set in the emulparams_file.) 78# 79# A .x script file is the default script. 80# A .xr script is for linking without relocation (-r flag). 81# A .xu script is like .xr, but *do* create constructors (-Ur flag). 82# A .xn script is for linking with -n flag (mix text and data on same page). 83# A .xbn script is for linking with -N flag (mix text and data on same page). 84# A .xs script is for generating a shared library with the --shared 85# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the 86# emulation parameters. 87# A .xc script is for linking with -z combreloc; it is only generated if 88# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 89# $SCRIPT_NAME is "elf". 90# A .xsc script is for linking with --shared -z combreloc; it is generated 91# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or 92# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation 93# parameters too. 94 95if [ "x$SCRIPT_NAME" = "xelf" ]; then 96 GENERATE_COMBRELOC_SCRIPT=yes 97fi 98 99SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 100 101# Determine DATA_ALIGNMENT for the 5 variants, using 102# values specified in the emulparams/<script_to_run>.sh file or default. 103 104DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 105DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 106DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 107DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 108DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 109 110LD_FLAG=r 111DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 112DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 113( echo "/* Script for ld -r: link without relocation */" 114 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 115 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 116) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 117 118LD_FLAG=u 119DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 120CONSTRUCTING=" " 121( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 122 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 123 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 124) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 125 126LD_FLAG= 127DATA_ALIGNMENT=${DATA_ALIGNMENT_} 128RELOCATING=" " 129( echo "/* Default linker script, for normal executables */" 130 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 131 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 132) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 133 134LD_FLAG=n 135DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 136TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}} 137( echo "/* Script for -n: mix text and data on same page */" 138 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 139 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 140) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 141 142LD_FLAG=N 143DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 144( echo "/* Script for -N: mix text and data on same page; don't align data */" 145 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 146 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 147) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 148 149if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 150 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 151 LD_FLAG=c 152 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 153 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 154 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 155 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 156 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 157 rm -f ${COMBRELOC} 158 LD_FLAG=w 159 RELRO_NOW=" " 160 COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp 161 ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */" 162 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 163 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 164 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw 165 rm -f ${COMBRELOC} 166 COMBRELOC= 167 unset RELRO_NOW 168fi 169 170if test -n "$GENERATE_SHLIB_SCRIPT"; then 171 LD_FLAG=shared 172 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 173 CREATE_SHLIB=" " 174 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 175 ( 176 echo "/* Script for ld --shared: link shared library */" 177 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 178 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 179 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 180 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 181 LD_FLAG=cshared 182 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 183 COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp 184 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 185 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 186 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 187 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 188 rm -f ${COMBRELOC} 189 LD_FLAG=wshared 190 RELRO_NOW=" " 191 COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp 192 ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */" 193 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 194 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 195 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw 196 rm -f ${COMBRELOC} 197 COMBRELOC= 198 unset RELRO_NOW 199 fi 200 unset CREATE_SHLIB 201fi 202 203if test -n "$GENERATE_PIE_SCRIPT"; then 204 LD_FLAG=pie 205 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 206 CREATE_PIE=" " 207 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 208 ( 209 echo "/* Script for ld -pie: link position independent executable */" 210 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 211 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 212 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 213 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 214 LD_FLAG=cpie 215 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 216 COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp 217 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 218 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 219 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 220 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 221 rm -f ${COMBRELOC} 222 LD_FLAG=wpie 223 RELRO_NOW=" " 224 COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp 225 ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */" 226 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 227 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 228 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw 229 rm -f ${COMBRELOC} 230 COMBRELOC= 231 unset RELRO_NOW 232 fi 233 unset CREATE_PIE 234fi 235 236case " $EMULATION_LIBPATH " in 237 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 238esac 239 240# Generate e${EMULATION_NAME}.c. 241. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 242