genscripts.sh revision 172243
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: head/gnu/usr.bin/binutils/ld/genscripts.sh 172243 2007-09-19 14:19:32Z obrien $ 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} ${EMULATION_NAME} 49 50if test -d ldscripts; then 51 true 52else 53 mkdir ldscripts 54fi 55 56# Set some flags for the emultempl scripts. USE_LIBPATH will 57# be set for any libpath-using emulation; NATIVE will be set for a 58# emulation to enable 'LD_LIBRARY_PATH=/foo:/bar ld -lfooz' 59 if [ "x${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#2.13: LIB_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 99#2.13: SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}} 100SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}} 101 102# Determine DATA_ALIGNMENT for the 5 variants, using 103# values specified in the emulparams/<emulation>.sh file or default. 104 105DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}" 106DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}" 107DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}" 108DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}" 109DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}" 110 111LD_FLAG=r 112DATA_ALIGNMENT=${DATA_ALIGNMENT_r} 113DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})" 114( echo "/* Script for ld -r: link without relocation */" 115 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 116 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 117) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr 118 119LD_FLAG=u 120DATA_ALIGNMENT=${DATA_ALIGNMENT_u} 121CONSTRUCTING=" " 122( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */" 123 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 124 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 125) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu 126 127LD_FLAG= 128DATA_ALIGNMENT=${DATA_ALIGNMENT_} 129RELOCATING=" " 130( echo "/* Default linker script, for normal executables */" 131 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 132 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 133) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x 134 135LD_FLAG=n 136DATA_ALIGNMENT=${DATA_ALIGNMENT_n} 137TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}} 138( echo "/* Script for -n: mix text and data on same page */" 139 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 140 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 141) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn 142 143LD_FLAG=N 144DATA_ALIGNMENT=${DATA_ALIGNMENT_N} 145( echo "/* Script for -N: mix text and data on same page; don't align data */" 146 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 147 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 148) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn 149 150if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 151 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}} 152 LD_FLAG=c 153 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 154 ( echo "/* Script for -z combreloc: combine and sort reloc sections */" 155 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 156 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 157 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc 158 rm -f ${COMBRELOC} 159 COMBRELOC= 160fi 161 162if test -n "$GENERATE_SHLIB_SCRIPT"; then 163 LD_FLAG=shared 164 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 165 CREATE_SHLIB=" " 166 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 167 ( 168 echo "/* Script for ld --shared: link shared library */" 169 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 170 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 171 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs 172 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 173 LD_FLAG=cshared 174 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 175 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 176 ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */" 177 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 178 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 179 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc 180 rm -f ${COMBRELOC} 181 COMBRELOC= 182 fi 183 unset CREATE_SHLIB 184fi 185 186if test -n "$GENERATE_PIE_SCRIPT"; then 187 LD_FLAG=pie 188 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} 189 CREATE_PIE=" " 190 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. 191 ( 192 echo "/* Script for ld -pie: link position independent executable */" 193 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 194 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 195 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd 196 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then 197 LD_FLAG=cpie 198 DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} 199 COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp 200 ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */" 201 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} 202 . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc 203 ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc 204 rm -f ${COMBRELOC} 205 COMBRELOC= 206 fi 207 unset CREATE_PIE 208fi 209 210case " $EMULATION_LIBPATH " in 211 *" ${EMULATION_NAME} "*) COMPILE_IN=true;; 212esac 213 214# Generate e${EMULATION_NAME}.c. 215. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em 216