2 # genscripts.sh - generate the ld-emulation-target specific files
4 # Usage: genscripts.sh srcdir libdir host target target_alias \
5 # default_emulation native_lib_dirs this_emulation
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
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.
18 # The exec_prefix, target_alias, use_sysroot, NATIVE_LIB_DIRS, TOOL_LIB, CUSTOMIZER_SCRIPT
19 # arguments are not used in this version.
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'.
41 # XXX: arm hack : until those file are merged back into the FSF repo, just
42 # use the version in this directory.
43 if !(test -f ${CUSTOMIZER_SCRIPT}"";) then
44 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${EMULATION_NAME}.sh"
47 # Include the emulation-specific parameters:
48 . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
50 if test -d ldscripts; then
57 # Set some flags for the emultempl scripts. USE_LIBPATH will
58 # be set for any libpath-using emulation; NATIVE will be set for a
59 # emulation to enable 'LD_LIBRARY_PATH=/foo:/bar ld -lfooz'
60 if [ "x${host}" = "x${target}" ] ; then
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.
69 # The format is the usual list of colon-separated directories.
70 # To force a logically empty LIB_PATH, do LIBPATH=":".
72 LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
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.)
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 $GENERATE_SHLIB_SCRIPT is set by the emulation
95 if [ "x$SCRIPT_NAME" = "xelf" ]; then
96 GENERATE_COMBRELOC_SCRIPT=yes
99 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
101 # Determine DATA_ALIGNMENT for the 5 variants, using
102 # values specified in the emulparams/<script_to_run>.sh file or default.
104 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
105 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
106 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
107 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
108 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
111 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
112 DEFAULT_DATA_ALIGNMENT="ALIGN(${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/${EMULATION_NAME}.xr
119 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
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/${EMULATION_NAME}.xu
127 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
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/${EMULATION_NAME}.x
135 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
136 TEXT_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/${EMULATION_NAME}.xn
143 DATA_ALIGNMENT=${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/${EMULATION_NAME}.xbn
149 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
150 DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
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/${EMULATION_NAME}.xc
160 COMBRELOC=ldscripts/${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/${EMULATION_NAME}.xw
170 if test -n "$GENERATE_SHLIB_SCRIPT"; then
172 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
174 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
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
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/${EMULATION_NAME}.xsc
191 COMBRELOC=ldscripts/${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/${EMULATION_NAME}.xsw
203 if test -n "$GENERATE_PIE_SCRIPT"; then
205 DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
207 # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
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
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/${EMULATION_NAME}.xdc
224 COMBRELOC=ldscripts/${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
236 case " $EMULATION_LIBPATH " in
237 *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
240 # Generate e${EMULATION_NAME}.c.
241 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em