genscripts.sh revision 1.6 
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${LIB_PATH}" = "x" ] ; then
48  # Cross, or native non-default emulation not requesting LIB_PATH.
49  LIB_PATH=
50
51  if [ "x${host}" = "x${target}" ] ; then
52    case " $EMULATION_LIBPATH " in
53      *" ${EMULATION_NAME} "*)
54        # Native, and default or emulation requesting LIB_PATH.
55        LIB_PATH=/usr/lib
56        if [ -n "${NATIVE_LIB_DIRS}" ]; then
57	  LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
58        fi
59        if [ "${libdir}" != /usr/lib ]; then
60	  LIB_PATH=${LIB_PATH}:${libdir}
61        fi
62    esac
63  fi
64fi
65
66# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
67LIB_PATH=${LIB_PATH}:${tool_lib}
68
69LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
70
71# Generate 5 or 6 script files from a master script template in
72# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
73# script files is actually used depends on command line options given
74# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
75#
76# A .x script file is the default script.
77# A .xr script is for linking without relocation (-r flag).
78# A .xu script is like .xr, but *do* create constructors (-Ur flag).
79# A .xn script is for linking with -n flag (mix text and data on same page).
80# A .xbn script is for linking with -N flag (mix text and data on same page).
81# A .xs script is for generating a shared library with the --shared
82#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
83#   emulation parameters.
84
85SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
86
87# Determine DATA_ALIGNMENT for the 5 variants, using
88# values specified in the emulparams/<emulation>.sh file or default.
89
90DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
91DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
92DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
93DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
94DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
95
96LD_FLAG=r
97DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
98DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
99(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
100  ldscripts/${EMULATION_NAME}.xr
101
102LD_FLAG=u
103DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
104CONSTRUCTING=" "
105(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
106  ldscripts/${EMULATION_NAME}.xu
107
108LD_FLAG=
109DATA_ALIGNMENT=${DATA_ALIGNMENT_}
110RELOCATING=" "
111(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
112  ldscripts/${EMULATION_NAME}.x
113
114LD_FLAG=n
115DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
116TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
117(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
118  ldscripts/${EMULATION_NAME}.xn
119
120LD_FLAG=N
121DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
122(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
123  ldscripts/${EMULATION_NAME}.xbn
124
125if test -n "$GENERATE_SHLIB_SCRIPT"; then
126  LD_FLAG=shared
127  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
128  CREATE_SHLIB=" "
129  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
130  (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
131    ldscripts/${EMULATION_NAME}.xs
132fi
133
134for i in $EMULATION_LIBPATH ; do
135  test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
136done
137
138# Generate e${EMULATION_NAME}.c.
139. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
140