1#!/usr/bin/env perl 2## 3## Copyright (c) 2010 The WebM project authors. All Rights Reserved. 4## 5## Use of this source code is governed by a BSD-style license 6## that can be found in the LICENSE file in the root of the source 7## tree. An additional intellectual property rights grant can be found 8## in the file PATENTS. All contributing project authors may 9## be found in the AUTHORS file in the root of the source tree. 10## 11 12 13# ads2gas_apple.pl 14# Author: Eric Fung (efung (at) acm.org) 15# 16# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format 17# 18# Usage: cat inputfile | perl ads2gas_apple.pl > outputfile 19# 20 21print "@ This file was created from a .asm file\n"; 22print "@ using the ads2gas_apple.pl script.\n\n"; 23print ".syntax unified\n"; 24 25my %macro_aliases; 26 27my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9"); 28 29my @incoming_array; 30 31# Perl trim function to remove whitespace from the start and end of the string 32sub trim($) 33{ 34 my $string = shift; 35 $string =~ s/^\s+//; 36 $string =~ s/\s+$//; 37 return $string; 38} 39 40while (<STDIN>) 41{ 42 # Load and store alignment 43 s/@/,:/g; 44 45 # Comment character 46 s/;/@/; 47 48 # Convert ELSE to .else 49 s/\bELSE\b/.else/g; 50 51 # Convert ENDIF to .endif 52 s/\bENDIF\b/.endif/g; 53 54 # Convert IF to .if 55 if (s/\bIF\b/.if/g) { 56 s/=+/==/g; 57 } 58 59 # Convert INCLUDE to .INCLUDE "file" 60 s/INCLUDE\s?(.*)$/.include \"$1\"/; 61 62 # No AREA required 63 # But ALIGNs in AREA must be obeyed 64 s/^(\s*)\bAREA\b.*ALIGN=([0-9])$/$1.text\n$1.p2align $2/; 65 # If no ALIGN, strip the AREA and align to 4 bytes 66 s/^(\s*)\bAREA\b.*$/$1.text\n$1.p2align 2/; 67 68 # Make function visible to linker. 69 s/EXPORT\s+\|([\$\w]*)\|/.globl _$1/; 70 71 # No vertical bars on function names 72 s/^\|(\$?\w+)\|/$1/g; 73 74 # Labels and functions need a leading underscore and trailing colon 75 s/^([a-zA-Z_0-9\$]+)/_$1:/ if !/EQU/; 76 77 # Branches need to call the correct, underscored, function 78 s/^(\s+b[egln]?[teq]?\s+)([a-zA-Z_0-9\$]+)/$1 _$2/ if !/EQU/; 79 80 # ALIGN directive 81 s/\bALIGN\b/.balign/g; 82 83 # Strip ARM 84 s/\s+ARM//; 85 86 # Strip REQUIRE8 87 s/\s+REQUIRE8//; 88 89 # Strip PRESERVE8 90 s/\s+PRESERVE8//; 91 92 # Strip PROC and ENDPROC 93 s/\bPROC\b//g; 94 s/\bENDP\b//g; 95 96 # EQU directive 97 s/(\S+\s+)EQU(\s+\S+)/.equ $1, $2/; 98 99 # Begin macro definition 100 if (/\bMACRO\b/) { 101 # Process next line down, which will be the macro definition 102 $_ = <STDIN>; 103 s/^/.macro/; 104 s/\$//g; # Remove $ from the variables in the declaration 105 } 106 107 s/\$/\\/g; # Use \ to reference formal parameters 108 # End macro definition 109 110 s/\bMEND\b/.endm/; # No need to tell it where to stop assembling 111 next if /^\s*END\s*$/; 112 s/[ \t]+$//; 113 print; 114} 115