genscripts.sh revision 104878 
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 104878 2002-10-11 10:07:46Z 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 host, target and target_alias arguments are not used in this version.
19#
20
21srcdir=$1
22libdir=$2
23host=$3
24target=$4
25target_alias=$5
26EMULATION_LIBPATH=$6
27NATIVE_LIB_DIRS=$7
28EMULATION_NAME=$8
29
30# Include the emulation-specific parameters:
31. ${srcdir}/emulparams/${EMULATION_NAME}.sh
32
33if test -d ldscripts; then
34  true
35else
36  mkdir ldscripts
37fi
38
39# Set the library search path, for libraries named by -lfoo.
40# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
41# Otherwise, the default is set here.
42#
43# The format is the usual list of colon-separated directories.
44# To force a logically empty LIB_PATH, do LIBPATH=":".
45
46LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
47#2.13	LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
48
49# Generate 5 or 6 script files from a master script template in
50# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
51# script files is actually used depends on command line options given
52# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
53#
54# A .x script file is the default script.
55# A .xr script is for linking without relocation (-r flag).
56# A .xu script is like .xr, but *do* create constructors (-Ur flag).
57# A .xn script is for linking with -n flag (mix text and data on same page).
58# A .xbn script is for linking with -N flag (mix text and data on same page).
59# A .xs script is for generating a shared library with the --shared
60#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
61#   emulation parameters.
62# A .xc script is for linking with -z combreloc; it is only generated if
63#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
64#   $SCRIPT_NAME is "elf".
65# A .xsc script is for linking with --shared -z combreloc; it is generated
66#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
67#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
68#   parameters too.
69
70if [ "x$SCRIPT_NAME" = "xelf" ]; then
71  GENERATE_COMBRELOC_SCRIPT=yes
72fi
73
74SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
75
76# Determine DATA_ALIGNMENT for the 5 variants, using
77# values specified in the emulparams/<emulation>.sh file or default.
78
79DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
80DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
81DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
82DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
83DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
84
85LD_FLAG=r
86DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
87DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
88( echo "/* Script for ld -r: link without relocation */"
89  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
90  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
91) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
92
93LD_FLAG=u
94DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
95CONSTRUCTING=" "
96( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
97  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
98  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
99) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
100
101LD_FLAG=
102DATA_ALIGNMENT=${DATA_ALIGNMENT_}
103RELOCATING=" "
104( echo "/* Default linker script, for normal executables */"
105  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
106  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
107) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
108
109LD_FLAG=n
110DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
111TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
112( echo "/* Script for -n: mix text and data on same page */"
113  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
114  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
115) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
116
117LD_FLAG=N
118DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
119( echo "/* Script for -N: mix text and data on same page; don't align data */"
120  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
121  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
122) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
123
124if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
125  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
126  LD_FLAG=c
127  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
128  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
129    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
130    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
131  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
132  rm -f ${COMBRELOC}
133  COMBRELOC=
134fi
135
136if test -n "$GENERATE_SHLIB_SCRIPT"; then
137  LD_FLAG=shared
138  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
139  CREATE_SHLIB=" "
140  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
141  (
142    echo "/* Script for ld --shared: link shared library */"
143    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
144    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
145  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
146  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
147    LD_FLAG=cshared
148    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
149    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
150    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
151      . ${srcdir}/emulparams/${EMULATION_NAME}.sh
152      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
153    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
154    rm -f ${COMBRELOC}
155    COMBRELOC=
156  fi
157fi
158
159case " $EMULATION_LIBPATH " in
160    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
161esac
162
163# Generate e${EMULATION_NAME}.c.
164. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
165