genscripts.sh revision 1.2 
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 tool_dir
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
12srcdir=$1
13libdir=$2
14host=$3
15target=$4
16target_alias=$5
17DEFAULT_EMULATION=$6
18NATIVE_LIB_DIRS=$7
19EMULATION_NAME=$8
20tool_lib=`echo ${libdir} | sed -e 's|/lib$||'`/${9-$target_alias}/lib
21
22# Include the emulation-specific parameters:
23. ${srcdir}/emulparams/${EMULATION_NAME}.sh
24
25if test -d ldscripts; then
26  true
27else
28  mkdir ldscripts
29fi
30
31# Set the library search path, for libraries named by -lfoo.
32# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
33# Otherwise, the default is set here.
34#
35# The format is the usual list of colon-separated directories.
36# To force a logically empty LIB_PATH, do LIBPATH=":".
37
38if [ "x${LIB_PATH}" = "x" ] ; then
39  if [ "x${host}" = "x${target}" ] ; then
40    if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then
41      # Native.
42      LIB_PATH=/lib:/usr/lib
43      if [ -n "${NATIVE_LIB_DIRS}" ]; then
44	LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
45      fi
46      if [ "${libdir}" != /usr/lib ]; then
47	LIB_PATH=${LIB_PATH}:${libdir}
48      fi
49      if [ "${libdir}" != /usr/local/lib ] ; then
50	LIB_PATH=${LIB_PATH}:/usr/local/lib
51      fi
52    else
53      # Native, but not default emulation.
54      LIB_PATH=
55    fi
56  else
57    # Cross.
58    LIB_PATH=
59  fi
60fi
61
62# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
63LIB_PATH=${LIB_PATH}:${tool_lib}
64
65LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
66
67# Generate 5 or 6 script files from a master script template in
68# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
69# script files is actually used depends on command line options given
70# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
71#
72# A .x script file is the default script.
73# A .xr script is for linking without relocation (-r flag).
74# A .xu script is like .xr, but *do* create constructors (-Ur flag).
75# A .xn script is for linking with -n flag (mix text and data on same page).
76# A .xbn script is for linking with -N flag (mix text and data on same page).
77# A .xs script is for generating a shared library with the --shared
78#   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
79#   emulation parameters.
80
81SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
82
83# Determine DATA_ALIGNMENT for the 5 variants, using
84# values specified in the emulparams/<emulation>.sh file or default.
85
86DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
87DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
88DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
89DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
90DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
91
92LD_FLAG=r
93DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
94DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
95(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
96  ldscripts/${EMULATION_NAME}.xr
97
98LD_FLAG=u
99DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
100CONSTRUCTING=" "
101(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
102  ldscripts/${EMULATION_NAME}.xu
103
104LD_FLAG=
105DATA_ALIGNMENT=${DATA_ALIGNMENT_}
106RELOCATING=" "
107(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
108  ldscripts/${EMULATION_NAME}.x
109
110LD_FLAG=n
111DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
112TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
113(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
114  ldscripts/${EMULATION_NAME}.xn
115
116LD_FLAG=N
117DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
118(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
119  ldscripts/${EMULATION_NAME}.xbn
120
121if test -n "$GENERATE_SHLIB_SCRIPT"; then
122  LD_FLAG=shared
123  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
124  CREATE_SHLIB=" "
125  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
126  (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
127    ldscripts/${EMULATION_NAME}.xs
128fi
129
130test "$DEFAULT_EMULATION" = "$EMULATION_NAME" && COMPILE_IN=true
131
132# Generate em_${EMULATION_NAME}.c.
133. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
134