genscripts.sh revision 130575 
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 130575 2004-06-16 07:09:44Z 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 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 ${EMULATION_NAME} parameter in uses
39# of 'CUSTOMIZER_SCRIPT'.
40CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${EMULATION_NAME}.sh"
41
42# Include the emulation-specific parameters:
43. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
44
45if test -d ldscripts; then
46  true
47else
48  mkdir ldscripts
49fi
50
51# Set some flags for the emultempl scripts.  USE_LIBPATH will
52# be set for any libpath-using emulation.
53      USE_LIBPATH=yes
54
55# Set the library search path, for libraries named by -lfoo.
56# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
57# Otherwise, the default is set here.
58#
59# The format is the usual list of colon-separated directories.
60# To force a logically empty LIB_PATH, do LIBPATH=":".
61
62LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
63#2.13:	LIB_SEARCH_DIRS=`echo ${libdir} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
64
65# Generate 5 or 6 script files from a master script template in
66# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
67# script files is actually used depends on command line options given
68# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
69#
70# A .x script file is the default script.
71# A .xr script is for linking without relocation (-r flag).
72# A .xu script is like .xr, but *do* create constructors (-Ur flag).
73# A .xn script is for linking with -n flag (mix text and data on same page).
74# A .xbn script is for linking with -N flag (mix text and data on same page).
75# A .xs script is for generating a shared library with the --shared
76#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
77#   emulation parameters.
78# A .xc script is for linking with -z combreloc; it is only generated if
79#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
80#   $SCRIPT_NAME is "elf".
81# A .xsc script is for linking with --shared -z combreloc; it is generated
82#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
83#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
84#   parameters too.
85
86if [ "x$SCRIPT_NAME" = "xelf" ]; then
87  GENERATE_COMBRELOC_SCRIPT=yes
88fi
89
90#2.13:	SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
91SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
92
93# Determine DATA_ALIGNMENT for the 5 variants, using
94# values specified in the emulparams/<emulation>.sh file or default.
95
96DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
97DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
98DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
99DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
100DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
101
102LD_FLAG=r
103DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
104DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
105( echo "/* Script for ld -r: link without relocation */"
106  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
107  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
108) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
109
110LD_FLAG=u
111DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
112CONSTRUCTING=" "
113( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
114  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
115  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
116) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
117
118LD_FLAG=
119DATA_ALIGNMENT=${DATA_ALIGNMENT_}
120RELOCATING=" "
121( echo "/* Default linker script, for normal executables */"
122  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
123  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
124) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
125
126LD_FLAG=n
127DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
128TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
129( echo "/* Script for -n: mix text and data on same page */"
130  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
131  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
132) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
133
134LD_FLAG=N
135DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
136( echo "/* Script for -N: mix text and data on same page; don't align data */"
137  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
138  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
139) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
140
141if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
142  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
143  LD_FLAG=c
144  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
145  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
146    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
147    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
148  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
149  rm -f ${COMBRELOC}
150  COMBRELOC=
151fi
152
153if test -n "$GENERATE_SHLIB_SCRIPT"; then
154  LD_FLAG=shared
155  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
156  CREATE_SHLIB=" "
157  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
158  (
159    echo "/* Script for ld --shared: link shared library */"
160    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
161    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
162  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
163  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
164    LD_FLAG=cshared
165    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
166    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
167    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
168      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
169      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
170    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
171    rm -f ${COMBRELOC}
172    COMBRELOC=
173  fi
174  unset CREATE_SHLIB
175fi
176
177if test -n "$GENERATE_PIE_SCRIPT"; then
178  LD_FLAG=pie
179  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
180  CREATE_PIE=" "
181  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
182  (
183    echo "/* Script for ld -pie: link position independent executable */"
184    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
185    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
186  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xd
187  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
188    LD_FLAG=cpie
189    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
190    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
191    ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
192      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
193      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
194    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xdc
195    rm -f ${COMBRELOC}
196    COMBRELOC=
197  fi
198  unset CREATE_PIE
199fi
200
201case " $EMULATION_LIBPATH " in
202    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
203esac
204
205# Generate e${EMULATION_NAME}.c.
206. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
207