genscripts.sh revision 104834 
1#!/bin/sh
2# genscripts.sh - generate the ld-emulation-target specific files
3#
4# Usage: genscripts.sh srcdir libdir exec_prefix \
5#        host target target_alias default_emulation \
6#        native_lib_dirs this_emulation tool_dir
7#
8# Sample usage:
9# genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib /usr/local \
10#  sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 \
11#  "" sun3 sparc-sun-sunos4.1.3
12# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
13
14srcdir=$1
15libdir=$2
16exec_prefix=$3
17host=$4
18target=$5
19target_alias=$6
20EMULATION_LIBPATH=$7
21NATIVE_LIB_DIRS=$8
22EMULATION_NAME=$9
23shift 9
24# Can't use ${1:-$target_alias} here due to an Ultrix shell bug.
25if [ "x$1" = "x" ] ; then
26  tool_lib=${exec_prefix}/${target_alias}/lib
27else
28  tool_lib=${exec_prefix}/$1/lib
29fi
30
31# Include the emulation-specific parameters:
32. ${srcdir}/emulparams/${EMULATION_NAME}.sh
33
34if test -d ldscripts; then
35  true
36else
37  mkdir ldscripts
38fi
39
40# Set the library search path, for libraries named by -lfoo.
41# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
42# Otherwise, the default is set here.
43#
44# The format is the usual list of colon-separated directories.
45# To force a logically empty LIB_PATH, do LIBPATH=":".
46
47if [ "x${LIB_PATH}" = "x" ] ; then
48  if [ "x${host}" = "x${target}" ] ; then
49    case " $EMULATION_LIBPATH " in
50      *" ${EMULATION_NAME} "*)
51        # Native, and default or emulation requesting LIB_PATH.
52	LIB_PATH=${libdir}
53	for lib in ${NATIVE_LIB_DIRS}; do
54	  case :${LIB_PATH}: in
55	    *:${lib}:*) ;;
56	    *) LIB_PATH=${LIB_PATH}:${lib} ;;
57	  esac
58	done
59    esac
60  fi
61fi
62
63# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
64LIB_PATH=${tool_lib}:${LIB_PATH}
65
66LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
67
68# Generate 5 or 6 script files from a master script template in
69# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
70# script files is actually used depends on command line options given
71# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
72#
73# A .x script file is the default script.
74# A .xr script is for linking without relocation (-r flag).
75# A .xu script is like .xr, but *do* create constructors (-Ur flag).
76# A .xn script is for linking with -n flag (mix text and data on same page).
77# A .xbn script is for linking with -N flag (mix text and data on same page).
78# A .xs script is for generating a shared library with the --shared
79#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
80#   emulation parameters.
81# A .xc script is for linking with -z combreloc; it is only generated if
82#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
83#   $SCRIPT_NAME is "elf".
84# A .xsc script is for linking with --shared -z combreloc; it is generated
85#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
86#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
87#   parameters too.
88
89if [ "x$SCRIPT_NAME" = "xelf" ]; then
90  GENERATE_COMBRELOC_SCRIPT=yes
91fi
92
93SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
94
95# Determine DATA_ALIGNMENT for the 5 variants, using
96# values specified in the emulparams/<emulation>.sh file or default.
97
98DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
99DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
100DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
101DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
102DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
103
104LD_FLAG=r
105DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
106DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
107( echo "/* Script for ld -r: link without relocation */"
108  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
109  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
110) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
111
112LD_FLAG=u
113DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
114CONSTRUCTING=" "
115( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
116  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
117  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
118) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
119
120LD_FLAG=
121DATA_ALIGNMENT=${DATA_ALIGNMENT_}
122RELOCATING=" "
123( echo "/* Default linker script, for normal executables */"
124  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
125  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
126) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
127
128LD_FLAG=n
129DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
130TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
131( echo "/* Script for -n: mix text and data on same page */"
132  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
133  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
134) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
135
136LD_FLAG=N
137DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
138( echo "/* Script for -N: mix text and data on same page; don't align data */"
139  . ${srcdir}/emulparams/${EMULATION_NAME}.sh
140  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
141) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
142
143if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
144  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
145  LD_FLAG=c
146  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
147  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
148    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
149    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
150  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
151  rm -f ${COMBRELOC}
152  COMBRELOC=
153fi
154
155if test -n "$GENERATE_SHLIB_SCRIPT"; then
156  LD_FLAG=shared
157  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
158  CREATE_SHLIB=" "
159  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
160  (
161    echo "/* Script for ld --shared: link shared library */"
162    . ${srcdir}/emulparams/${EMULATION_NAME}.sh
163    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
164  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
165  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
166    LD_FLAG=cshared
167    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
168    COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
169    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
170      . ${srcdir}/emulparams/${EMULATION_NAME}.sh
171      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
172    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
173    rm -f ${COMBRELOC}
174    COMBRELOC=
175  fi
176fi
177
178case " $EMULATION_LIBPATH " in
179    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
180esac
181
182# Generate e${EMULATION_NAME}.c.
183. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
184