ref: bff7ecc517715af808526bbfb96490497c47010b
dir: /build/make/ads2gas_apple.pl/
#!/usr/bin/env perl ## ## Copyright (c) 2010 The WebM project authors. All Rights Reserved. ## ## Use of this source code is governed by a BSD-style license ## that can be found in the LICENSE file in the root of the source ## tree. An additional intellectual property rights grant can be found ## in the file PATENTS. All contributing project authors may ## be found in the AUTHORS file in the root of the source tree. ## # ads2gas_apple.pl # Author: Eric Fung (efung (at) acm.org) # # Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format # # Usage: cat inputfile | perl ads2gas_apple.pl > outputfile # print "@ This file was created from a .asm file\n"; print "@ using the ads2gas_apple.pl script.\n\n"; print "\t.syntax unified\n"; my %register_aliases; my %macro_aliases; my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9"); my @incoming_array; my @imported_functions; # Perl trim function to remove whitespace from the start and end of the string sub trim($) { my $string = shift; $string =~ s/^\s+//; $string =~ s/\s+$//; return $string; } while (<STDIN>) { # Load and store alignment s/@/,:/g; # Comment character s/;/ @/g; # Hexadecimal constants prefaced by 0x s/#&/#0x/g; # Convert :OR: to | s/:OR:/ | /g; # Convert :AND: to & s/:AND:/ & /g; # Convert :NOT: to ~ s/:NOT:/ ~ /g; # Convert :SHL: to << s/:SHL:/ << /g; # Convert :SHR: to >> s/:SHR:/ >> /g; # Convert ELSE to .else s/\bELSE\b/.else/g; # Convert ENDIF to .endif s/\bENDIF\b/.endif/g; # Convert ELSEIF to .elseif s/\bELSEIF\b/.elseif/g; # Convert LTORG to .ltorg s/\bLTORG\b/.ltorg/g; # Convert IF :DEF:to .if # gcc doesn't have the ability to do a conditional # if defined variable that is set by IF :DEF: on # armasm, so convert it to a normal .if and then # make sure to define a value elesewhere if (s/\bIF :DEF:\b/.if /g) { s/=/==/g; } # Convert IF to .if if (s/\bIF\b/.if/g) { s/=/==/g; } # Convert INCLUDE to .INCLUDE "file" s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/; # Code directive (ARM vs Thumb) s/CODE([0-9][0-9])/.code $1/; # No AREA required # But ALIGNs in AREA must be obeyed s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/; # If no ALIGN, strip the AREA and align to 4 bytes s/^\s*AREA.*$/.text\n.p2align 2/; # DCD to .word # This one is for incoming symbols s/DCD\s+\|(\w*)\|/.long $1/; # DCW to .short s/DCW\s+\|(\w*)\|/.short $1/; s/DCW(.*)/.short $1/; # Constants defined in scope s/DCD(.*)/.long $1/; s/DCB(.*)/.byte $1/; # Make function visible to linker, and make additional symbol with # prepended underscore s/EXPORT\s+\|([\$\w]*)\|/.globl _$1\n\t.globl $1/; # Prepend imported functions with _ if (s/IMPORT\s+\|([\$\w]*)\|/.globl $1/) { $function = trim($1); push(@imported_functions, $function); } foreach $function (@imported_functions) { s/$function/_$function/; } # No vertical bars required; make additional symbol with prepended # underscore s/^\|(\$?\w+)\|/_$1\n\t$1:/g; # Labels need trailing colon # s/^(\w+)/$1:/ if !/EQU/; # put the colon at the end of the line in the macro s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/; # ALIGN directive s/\bALIGN\b/.balign/g; # Strip ARM s/\sARM/@ ARM/g; # Strip REQUIRE8 #s/\sREQUIRE8/@ REQUIRE8/g; s/\sREQUIRE8/@ /g; # Strip PRESERVE8 s/\sPRESERVE8/@ PRESERVE8/g; # Strip PROC and ENDPROC s/\bPROC\b/@/g; s/\bENDP\b/@/g; # EQU directive s/(.*)EQU(.*)/.set $1, $2/; # Begin macro definition if (/\bMACRO\b/) { # Process next line down, which will be the macro definition $_ = <STDIN>; $trimmed = trim($_); # remove commas that are separating list $trimmed =~ s/,//g; # string to array @incoming_array = split(/\s+/, $trimmed); print ".macro @incoming_array[0]\n"; # remove the first element, as that is the name of the macro shift (@incoming_array); @macro_aliases{@incoming_array} = @mapping_list; next; } while (($key, $value) = each(%macro_aliases)) { $key =~ s/\$/\\\$/; s/$key\b/$value/g; } # For macros, use \ to reference formal params # s/\$/\\/g; # End macro definition s/\bMEND\b/.endm/; # No need to tell it where to stop assembling next if /^\s*END\s*$/; print; }