genscripts.sh revision 92237 
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 92237 2002-03-13 18:26:59Z 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} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
47
48# Generate 5 or 6 script files from a master script template in
49# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
50# script files is actually used depends on command line options given
51# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
52#
53# A .x script file is the default script.
54# A .xr script is for linking without relocation (-r flag).
55# A .xu script is like .xr, but *do* create constructors (-Ur flag).
56# A .xn script is for linking with -n flag (mix text and data on same page).
57# A .xbn script is for linking with -N flag (mix text and data on same page).
58# A .xs script is for generating a shared library with the --shared
59#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
60#   emulation parameters.
61# A .xc script is for linking with -z combreloc; it is only generated if
62#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
63#   $SCRIPT_NAME is "elf".
64# A .xsc script is for linking with --shared -z combreloc; it is generated
65#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
66#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
67#   parameters too.
68
69if [ "x$SCRIPT_NAME" = "xelf" ]; then
70  GENERATE_COMBRELOC_SCRIPT=yes
71fi
72
73SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
74
75# Determine DATA_ALIGNMENT for the 5 variants, using
76# values specified in the emulparams/<emulation>.sh file or default.
77
78DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
79DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
80DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
81DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
82DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
83
84LD_FLAG=r
85DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
86DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
87( echo "/* Script for ld -r: link without relocation */"
88  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
89  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
90) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
91
92LD_FLAG=u
93DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
94CONSTRUCTING=" "
95( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
96  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
97  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
98) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
99
100LD_FLAG=
101DATA_ALIGNMENT=${DATA_ALIGNMENT_}
102RELOCATING=" "
103( echo "/* Default linker script, for normal executables */"
104  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
105  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
106) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
107
108LD_FLAG=n
109DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
110TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
111( echo "/* Script for -n: mix text and data on same page */"
112  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
113  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
114) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
115
116LD_FLAG=N
117DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
118( echo "/* Script for -N: mix text and data on same page; don't align data */"
119  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
120  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
121) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
122
123if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
124  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
125  LD_FLAG=c
126  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
127  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
128    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
129    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
130  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
131  rm -f ${COMBRELOC}
132  COMBRELOC=
133fi
134
135if test -n "$GENERATE_SHLIB_SCRIPT"; then
136  LD_FLAG=shared
137  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
138  CREATE_SHLIB=" "
139  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
140  (
141    echo "/* Script for ld --shared: link shared library */"
142    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
143    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
144  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
145  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
146    LD_FLAG=cshared
147    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
148    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
149    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
150      . ${srcdir}/emulparams/${EMULATION_NAME}.sh
151      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
152    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
153    rm -f ${COMBRELOC}
154    COMBRELOC=
155  fi
156fi
157
158for i in $EMULATION_LIBPATH ; do
159  test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
160done
161# Generate e${EMULATION_NAME}.c.
162. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
163