genscripts.sh revision 1.1 
1#!/bin/sh
2# genscripts.sh - generate the ld-emulation-target specific files
3#
4# Usage: genscripts.sh srcdir libdir host_alias target_alias \
5# default_emulation 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 sun4 sun3
10# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
11
12srcdir=$1
13libdir=$2
14host_alias=$3
15target_alias=$4
16DEFAULT_EMULATION=$5
17NATIVE_LIB_DIRS=$6
18EMULATION_NAME=$7
19
20# Include the emulation-specific parameters:
21. ${srcdir}/emulparams/${EMULATION_NAME}.sh
22
23if test -d ldscripts; then
24  true
25else
26  mkdir ldscripts
27fi
28
29# Set the library search path, for libraries named by -lfoo.
30# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
31# Otherwise, the default is set here.
32#
33# The format is the usual list of colon-separated directories.
34# To force a logically empty LIB_PATH, do LIBPATH=":".
35
36if [ "x${LIB_PATH}" = "x" ] ; then
37  if [ "x${host_alias}" = "x${target_alias}" ] ; then
38    if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then
39      # Native.
40      LIB_PATH=/lib:/usr/lib
41      if [ -n "${NATIVE_LIB_DIRS}" ]; then
42	LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
43      fi
44      if [ "${libdir}" != /usr/lib ]; then
45	LIB_PATH=${LIB_PATH}:${libdir}
46      fi
47      if [ "${libdir}" != /usr/local/lib ] ; then
48	LIB_PATH=${LIB_PATH}:/usr/local/lib
49      fi
50    else
51      # Native, but not default emulation.
52      LIB_PATH=
53    fi
54  else
55    # Cross.
56    LIB_PATH=
57  fi
58fi
59
60# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
61LIB_PATH=${LIB_PATH}:`echo ${libdir} | sed -e s'|/lib$||'`/${target_alias}/lib
62
63LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -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 $GENERATE_SHLIB_SCRIPT is set by the
77#   emulation parameters.
78
79SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
80
81# Determine DATA_ALIGNMENT for the 5 variants, using
82# values specified in the emulparams/<emulation>.sh file or default.
83
84DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
85DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
86DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
87DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
88DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
89
90LD_FLAG=r
91DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
92DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
93(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
94  ldscripts/${EMULATION_NAME}.xr
95
96LD_FLAG=u
97DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
98CONSTRUCTING=" "
99(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
100  ldscripts/${EMULATION_NAME}.xu
101
102LD_FLAG=
103DATA_ALIGNMENT=${DATA_ALIGNMENT_}
104RELOCATING=" "
105(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
106  ldscripts/${EMULATION_NAME}.x
107
108LD_FLAG=n
109DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
110TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
111(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
112  ldscripts/${EMULATION_NAME}.xn
113
114LD_FLAG=N
115DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
116(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
117  ldscripts/${EMULATION_NAME}.xbn
118
119if test -n "$GENERATE_SHLIB_SCRIPT"; then
120  LD_FLAG=shared
121  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
122  CREATE_SHLIB=" "
123  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
124  (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
125    ldscripts/${EMULATION_NAME}.xs
126fi
127
128test "$DEFAULT_EMULATION" = "$EMULATION_NAME" && COMPILE_IN=true
129
130# Generate em_${EMULATION_NAME}.c.
131. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
132