genscripts.sh revision 162301 
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 162301 2006-09-14 07:46:32Z imp $
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.
58      USE_LIBPATH=yes
59
60# Set the library search path, for libraries named by -lfoo.
61# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
62# Otherwise, the default is set here.
63#
64# The format is the usual list of colon-separated directories.
65# To force a logically empty LIB_PATH, do LIBPATH=":".
66
67LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
68#2.13:	LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
69
70# Generate 5 or 6 script files from a master script template in
71# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
72# script files is actually used depends on command line options given
73# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
74#
75# A .x script file is the default script.
76# A .xr script is for linking without relocation (-r flag).
77# A .xu script is like .xr, but *do* create constructors (-Ur flag).
78# A .xn script is for linking with -n flag (mix text and data on same page).
79# A .xbn script is for linking with -N flag (mix text and data on same page).
80# A .xs script is for generating a shared library with the --shared
81#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
82#   emulation parameters.
83# A .xc script is for linking with -z combreloc; it is only generated if
84#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
85#   $SCRIPT_NAME is "elf".
86# A .xsc script is for linking with --shared -z combreloc; it is generated
87#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
88#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
89#   parameters too.
90
91if [ "x$SCRIPT_NAME" = "xelf" ]; then
92  GENERATE_COMBRELOC_SCRIPT=yes
93fi
94
95#2.13:	SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
96SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
97
98# Determine DATA_ALIGNMENT for the 5 variants, using
99# values specified in the emulparams/<emulation>.sh file or default.
100
101DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
102DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
103DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
104DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
105DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
106
107LD_FLAG=r
108DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
109DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
110( echo "/* Script for ld -r: link without relocation */"
111  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
112  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
113) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
114
115LD_FLAG=u
116DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
117CONSTRUCTING=" "
118( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
119  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
120  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
121) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
122
123LD_FLAG=
124DATA_ALIGNMENT=${DATA_ALIGNMENT_}
125RELOCATING=" "
126( echo "/* Default linker script, for normal executables */"
127  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
128  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
129) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
130
131LD_FLAG=n
132DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
133TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
134( echo "/* Script for -n: mix text and data on same page */"
135  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
136  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
137) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
138
139LD_FLAG=N
140DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
141( echo "/* Script for -N: mix text and data on same page; don't align data */"
142  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
143  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
144) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
145
146if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
147  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
148  LD_FLAG=c
149  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
150  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
151    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
152    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
153  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
154  rm -f ${COMBRELOC}
155  COMBRELOC=
156fi
157
158if test -n "$GENERATE_SHLIB_SCRIPT"; then
159  LD_FLAG=shared
160  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
161  CREATE_SHLIB=" "
162  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
163  (
164    echo "/* Script for ld --shared: link shared library */"
165    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
166    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
167  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
168  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
169    LD_FLAG=cshared
170    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
171    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
172    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
173      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
174      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
175    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
176    rm -f ${COMBRELOC}
177    COMBRELOC=
178  fi
179  unset CREATE_SHLIB
180fi
181
182if test -n "$GENERATE_PIE_SCRIPT"; then
183  LD_FLAG=pie
184  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
185  CREATE_PIE=" "
186  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
187  (
188    echo "/* Script for ld -pie: link position independent executable */"
189    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
190    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
191  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xd
192  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
193    LD_FLAG=cpie
194    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
195    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
196    ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
197      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
198      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
199    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xdc
200    rm -f ${COMBRELOC}
201    COMBRELOC=
202  fi
203  unset CREATE_PIE
204fi
205
206case " $EMULATION_LIBPATH " in
207    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
208esac
209
210# Generate e${EMULATION_NAME}.c.
211. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
212