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annotate extra/as @ 333:507f442dc71e
Add support for 6800 compatibility instructions.
The occasional program uses the 6800 compatibility instructions since they
are actually specified by Motorola in at least some documentation. They
advertised the 6809 as source compatible with the 6800.
This mode is not enabled by default, however. It is my belief that receiving
an error when using a non-6809 instruction is more useful since it is
unlikely that much 6800 source code is being assembled for the 6809 these
days. Nevertheless, the --6809compat option is present for just those
purposes so one does not have to resort to using macros (which would work
equally well in most cases).
author | William Astle <lost@l-w.ca> |
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date | Tue, 15 Apr 2014 10:57:34 -0600 |
parents | 84eb35251849 |
children | f5a88f147fae |
rev | line source |
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1 #!/bin/sh |
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2 # |
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3 # Copyright 2009 by William Astle <lost@l-w.ca> |
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4 # |
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5 #This file is part of LWASM. |
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6 # |
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7 #LWASM is free software: you can redistribute it and/or modify it under the |
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8 #terms of the GNU General Public License as published by the Free Software |
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9 #Foundation, either version 3 of the License, or (at your option) any later |
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10 #version. |
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11 # |
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12 #This program is distributed in the hope that it will be useful, but WITHOUT |
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13 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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15 #more details. |
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16 # |
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17 #You should have received a copy of the GNU General Public License along with |
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18 #this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 # this was based somewhat on the "as" script from gcc6809 |
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21 |
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22 #echo "LWASM-as $0 $*" |
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23 |
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24 show_version () { |
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25 cat <<END |
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26 LWASM (GNU assembler frontend) 2.3 |
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27 This program is free software; you may redistribute it under the terms of |
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28 the GNU General Public License. This program has absolutely no warranty. |
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29 END |
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30 } |
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31 |
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32 fatal_error () { |
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33 echo $* 1>&2 |
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34 exit 1 |
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35 } |
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36 |
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37 # Assume nothing. |
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38 |
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39 input_file= |
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40 output_file= |
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41 list_file= |
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42 options= |
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43 list_file_enabled=n |
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44 |
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45 # Parse the command-line options. See the GNU 'as' man page for |
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46 # an explanation of all these options. Our goal is to translate |
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47 # them into lwasm form. |
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48 |
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49 while [ "$1" != "" ]; do |
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50 arg=$1; shift |
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51 case $arg in |
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52 -m6809) |
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53 true |
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54 ;; |
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55 -gn) |
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56 # Generate NoICE debug symbols |
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57 # ignored - no output formats support debugging symbols |
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58 ;; |
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59 -gs) |
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60 # Generate SDCC debug symbols |
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61 # ignored - no output formats supprt debugging symbols |
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62 ;; |
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63 # --globalize-symbols) |
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64 # # Make all symbols global |
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65 # # lwasm does not support globalizing everything by default |
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66 # ;; |
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67 -m*) |
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68 fatal_error "invalid CPU option '$arg'" |
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69 ;; |
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70 --) |
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71 fatal_error "standard input not supported" |
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72 ;; |
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73 # -a*) |
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74 # options="${options}lc" |
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75 # list_file_enabled=y |
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76 # ;; |
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77 -I*) |
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78 #include_file=${arg#-I} |
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79 #echo "warning: include path '$include_file' ignored" |
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80 ;; |
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81 -MD) |
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82 fatal_error "assembler option '$arg' not supported" |
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83 ;; |
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84 -o) |
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85 output_file=$1; shift |
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86 ;; |
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87 -v|-version) |
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88 show_version |
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89 ;; |
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90 --version) |
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91 show_version |
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92 exit 0 |
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93 ;; |
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94 -D|-f|-K|--traditional-format|-w|-x|-Z|-W|--no-warn) |
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95 # These options are accepted but ignored by GNU as. |
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96 true |
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97 ;; |
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98 # =*) |
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99 # # Set the name of the listing file |
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100 # list_file=${arg#=} |
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101 # ;; |
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102 -Qy) |
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103 # "identify in output" - ignore |
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104 true |
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105 ;; |
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106 -*) |
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107 echo "as (m6809): unrecognized option $arg" |
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108 exit 1 |
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109 ;; |
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110 *) |
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111 input_file=$arg |
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112 ;; |
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113 esac |
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114 done |
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115 |
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116 # Complain if no input files given. We don't support redirecting |
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117 # from standard input. |
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118 |
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119 if [ "x$input_file" = "x" ]; then |
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120 fatal_error "no input file specified" |
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121 fi |
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122 |
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123 # Invoke the real (lwasm) assembler. |
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124 # The -o option specifies the output file name |
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125 # --obj creates object files |
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126 # --pragma=undefextern causes undefined symbols to be assumed external |
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127 # --pragma=cescapes allows C escape syntax in strings |
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128 #echo lwasm -o "$output_file" $options --obj --pragma=undefextern --pragma=cescapes $input_file |
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129 lwasm -o "$output_file" $options --obj --pragma=undefextern --pragma=cescapes --pragma=importundefexport $input_file |
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130 rc=$? |
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131 |
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132 # OK, see if the assembler succeeded or not. |
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133 # If it failed, the source is copied to /tmp/as6809_error.s |
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134 # so that it can be inspected. GCC will normally delete any |
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135 # temporary .s files that it generates. This makes debugging |
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136 # the compiler easier. |
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137 # |
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138 # lwasm does not create an output file if it errors out but it also doesn't |
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139 # remove an existing file if it fails so we remove it anyway... |
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140 |
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141 if [ "$rc" != "0" ]; then |
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142 cp -p $input_file /tmp/as6809_error.s |
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143 rm -f $asoutput_file |
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144 exit $rc |
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145 fi |
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146 |
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147 # we don't need anything fancy here since lwasm supports specifying output |
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148 # file names.... |