genscripts.sh revision 172241 
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 172241 2007-09-19 12:17:39Z thomas $
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} ${EMULATION_NAME}
49
50if test -d ldscripts; then
51  true
52else
53  mkdir ldscripts
54fi
55
56# Set some flags for the emultempl scripts.  USE_LIBPATH will
57# be set for any libpath-using emulation.
58if [ "x${host}" = "x${target}" ] ; then
59  NATIVE=yes
60fi
61USE_LIBPATH=yes
62
63# Set the library search path, for libraries named by -lfoo.
64# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
65# Otherwise, the default is set here.
66#
67# The format is the usual list of colon-separated directories.
68# To force a logically empty LIB_PATH, do LIBPATH=":".
69
70LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
71#2.13:	LIB_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
98#2.13:	SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
99SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
100
101# Determine DATA_ALIGNMENT for the 5 variants, using
102# values specified in the emulparams/<emulation>.sh file or default.
103
104DATA_ALIGNMENT_="${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 ${COMBRELOC}
158  COMBRELOC=
159fi
160
161if test -n "$GENERATE_SHLIB_SCRIPT"; then
162  LD_FLAG=shared
163  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
164  CREATE_SHLIB=" "
165  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
166  (
167    echo "/* Script for ld --shared: link shared library */"
168    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
169    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
170  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
171  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
172    LD_FLAG=cshared
173    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
174    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
175    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
176      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
177      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
178    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
179    rm -f ${COMBRELOC}
180    COMBRELOC=
181  fi
182  unset CREATE_SHLIB
183fi
184
185if test -n "$GENERATE_PIE_SCRIPT"; then
186  LD_FLAG=pie
187  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
188  CREATE_PIE=" "
189  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
190  (
191    echo "/* Script for ld -pie: link position independent executable */"
192    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
193    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
194  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xd
195  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
196    LD_FLAG=cpie
197    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
198    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
199    ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
200      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
201      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
202    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xdc
203    rm -f ${COMBRELOC}
204    COMBRELOC=
205  fi
206  unset CREATE_PIE
207fi
208
209case " $EMULATION_LIBPATH " in
210    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
211esac
212
213# Generate e${EMULATION_NAME}.c.
214. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
215