mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-27 08:10:07 +08:00
297 lines
8.7 KiB
Perl
297 lines
8.7 KiB
Perl
#!/usr/bin/perl
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sub StabLine ($ $ $ $ $ $) {
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local ($comment,$n_strx,$type,$other,$desc,$value) = @_;
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print $comment;
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print "","dd",$n_strx;
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print "","db",$type;
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print "","db",$other;
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print "","dw",$desc;
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print "","dd","0" . $value . "h";
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}
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sub RStabLine ($ $ $ $ $) {
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local ($comment,$offset,$info,$type,$symbol) = @_;
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print $comment;
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print "","dd",$offset;
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print "","db",$type;
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print "","db",$symbol;
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print "","dw",$info;
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}
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#this sub exists because i've no idea how to print non-ascii numbers in perl
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sub OutBin ( $ $ ) {
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local ($offset, $shnum) = @_;
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seek(FINAL,$offset,0);
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if ( $shnum == 2 ) { printf FINAL "\x02" } ;
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if ( $shnum == 3 ) { printf FINAL "\x03" } ;
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if ( $shnum == 4 ) { printf FINAL "\x04" } ;
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if ( $shnum == 5 ) { printf FINAL "\x05" } ;
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if ( $shnum == 6 ) { printf FINAL "\x06" } ;
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if ( $shnum == 7 ) { printf FINAL "\x07" } ;
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if ( $shnum == 8 ) { printf FINAL "\x08" } ;
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if ( $shnum == 9 ) { printf FINAL "\x09" } ;
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if ( $shnum == 10 ) { printf FINAL "\x0a" } ;
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if ( $shnum == 11 ) { printf FINAL "\x0b" } ;
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if ( $shnum == 12 ) { printf FINAL "\x0c" } ;
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if ( $shnum == 13 ) { printf FINAL "\x0d" } ;
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if ( $shnum == 14 ) { printf FINAL "\x0e" } ;
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if ( $shnum == 15 ) { printf FINAL "\x0f" } ;
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}
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sub DispHelp () {
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$\="\n";
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print "Usage:";
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print "\t-f,--input-file";
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print "\t\tThe input file name (only required option)";
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print "\t-o,--output-file";
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print "\t\tThe output file name (if not specified, *.asm becomes *.o";
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print "\t\tand anything else becomes a.out)";
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print "\t-l,--list-file";
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print "\t\tThe listing file's name (default: trailing .asm is
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removed";
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print "\t\tif there and .lst is appended)";
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print "\t-s,--second-asm-file";
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print "\t\tThe second asm file's name (default: trailing .asm is";
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print "\t\tremoved if there and .nasm is appended)";
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print "\n";
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exit ;
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}
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if ( $ARGV[0] eq "" ) { $ARGV[0] = "-h" };
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$i = 0;
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$filename = "";
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$outname = "";
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while ( $ARGV[$i] ne "" ) {
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$_ = $ARGV[$i];
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if ( m/^-/ ) {
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if ( m/^-f$/ ) { $filename = $ARGV[++$i] };
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if ( m/^-o$/ ) { $outname = $ARGV[++$i] };
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if ( m/^-l$/ ) { $listname = $ARGV[++$i] };
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if ( m/^-s$/ ) { $asmname = $ARGV[++$i] };
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if ( m/^-h$/ ) { DispHelp };
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} elsif ( m/^--\w+/ ) {
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if ( m/^--input-file$/ ) { $filename = $ARGV[++$i] };
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if ( m/^--output-file$/ ) { $outname = $ARGV[++$i] };
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if ( m/^--list-file$/ ) { $listname = $ARGV[++$i] };
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if ( m/^--second-asm-file$/ ) { $asmname = $ARGV[++$i] };
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if ( m/^--help/ ) { DispHelp };
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} elsif ( m/^--$/ ) {
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while ( $ARGV[++$i] ) {
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$NasmOptions .= " ";
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$NasmOptions .= $_;
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};
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} else {
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DispHelp()
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};
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$i++;
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};
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if ( $filename eq "" ) { DispHelp() };
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if ( $outname eq "" ) {
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$outname = $filename;
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$outname =~ s/\.asm/.o/;
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if ( $outname eq $filename ) { $outname = "a.out" };
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};
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if ( $listname eq "" ) {
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$listname = $filename;
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$listname =~ s/\.asm//;
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$listname .= ".lst";
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};
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if ( $asmname eq "" ) {
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$asmname = $filename;
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$asmname =~ s/\.asm//;
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$asmname .= ".nasm";
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};
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$err = `nasm -f elf ${filename} -l ${listname} -o ${outname} `;
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if ( $err ) { die "\n$err\n"};
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open(LISTFILE,"${listname}") or die "\n $0: Could not reopen list file!\n";
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open(ASMFILE,">${asmname}") or die "\n $0: Could not open asm file!\n";
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select ASMFILE;
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open(OLDASM,$filename) or die "\n$0: Cannot open file $filename\n";
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while ( $x = <OLDASM> ) {
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print $x;
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}
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@stab = ("n_desc", "value");
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@rel_stab = ("offset");
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$i = 0;
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$current_section = "";
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$has_text = 'FALSE';
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$midst_of_macro = 'FALSE';
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$line_dec = 0 ;
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while ( $x = <LISTFILE> ) {
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if ( $x =~ m/[^;]*%include/ ) {
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$x = <LISTFILE>;
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while ( $x =~ m/\s+\d+\s+\<\d+\>\s+/ ) {
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$x = <LISTFILE>;
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$line_dec++;
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}
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}
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if ( $current_section eq ".text" ) {
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if ( $x =~ m/^\s+(\S+)\s+(\S+)\s+(\S+)\s+[^<]+$/ ) {
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$stab[$i++] = $1-$line_dec; #linenum
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$stab[$i++] = $2; #offset
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$count++;
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if ( $3 =~ m/-/ ) {
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$x = <LISTFILE>;
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$line_dec++;
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}
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$midst_of_macro = 'FALSE';
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} elsif ( $x =~ m/^\s+(\S+)\s+(\S+)\s+(\S+)\s+<\d+>/ ) {
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if ( $midst_of_macro eq 'TRUE' ) {
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$stab[$i] = $stab[$i-2]; #same linenum
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$line_dec++;
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} else {
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$stab[$i] = $1 - ++$line_dec;
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$midst_of_macro = 'TRUE';
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}
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$count++;
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$i++;
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$stab[$i++] = $2;
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if ( $3 =~ m/-/ ) {
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$x = <LISTFILE>;
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$line_dec++;
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}
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}
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$has_text = 'TRUE';
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} elsif ( $x =~ m/\s+\S+\s+\S+\s+\S+\s+<\d+>/ ) { # is it a macro?
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$line_dec++;
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}
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if ( $x =~ s/(section|segment)\s+([^\s]+)/$2/ ) {
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$current_section = $2;
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}
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};
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close LISTFILE;
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unless ( $has_text eq "TRUE" ) {
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$err = `nasm -f elf ${asmname} -o ${outname}`;
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print STDERR $err;
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exit;
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}
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#Write Stab section
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$, = "\t"; #output field separator
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$\ = "\n"; #output record separator
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print "section .stab noalloc";
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StabLine(";header",1,0,0,$count+1,length($filename)*2+3);
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StabLine(";so",length($asmname)+2,"064h",0,0,0);
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$offset = 12;
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$i = 0;
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$j = 0;
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$rel_stab[$j++] = $offset + 8;
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while ( $stab[$i] ) {
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StabLine(";N_SLINE" . " " . ( ($i+2) / 2 ), 0, "044h", 0,
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$stab[$i++], $stab[$i++]);
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$offset += 12;
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$rel_stab[$j++] = $offset + 8;
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}
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#Write .rel.stab section
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print "\n\nsection .rel.stab noalloc";
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open (READELF,"readelf -s ${outname} |") or die "\n$0: Could not run readelf\n";
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while ( $x = <READELF> ) {
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if ( $x =~ m/\s+(\d+):\s+00000000\s+\d+\s+SECTION\s+\w+\s+\w+\s+1\s+/){ $textsymnum = $1;
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};
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};
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close READELF;
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$i = 0;
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while ( $rel_stab[$i] ne "" ) {
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RStabLine(";relocation for N_SLINE " . ($i), $rel_stab[$i], 0, 1, $textsymnum);
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$i++;
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} ;
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#Write .stabstr section
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print "\n\nsection .stabstr noalloc";
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print "","db","0";
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print "","db",'"' . $asmname . '"';
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print "","db","0";
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print "","db",'"' . $asmname . '"' ;
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print "","db","0";
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close ASMFILE;
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$err = `nasm -f elf ${asmname} -o ${outname}`;
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if ( $err ) { die "\n$err\n" } ;
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open (READELF,"readelf -h -S ${outname} |") or die "\n$0: Could not run readelf\n";
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while ( $x = <READELF> ) {
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if ( $x =~ m/Start\s+of\s+section\s+headers:\s+(\d+)\s+/ ) {
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$shoff = $1;
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}
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if ( $x =~ m/Size\s+of\s+section\s+headers:\s+(\d+)\s+/ ) {
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$shentsize = $1;
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}
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if ( $x =~ m/\[\s*(\d+)\]\s+.rel.stab\s+/ ) {
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$relnum = $1;
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}
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if ( $x =~ m/\[\s*(\d+)\]\s+.stab\s+/ ) {
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$stabnum = $1;
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}
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if ( $x =~ m/\[\s*(\d+)\]\s+.stabstr\s+/ ) {
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$stabstrnum = $1;
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}
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if ( $x =~ m/\[\s*(\d+)\]\s+.symtab\s+/ ) {
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$symtabnum = $1;
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}
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}
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close READELF;
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sysopen (FINAL,"${outname}",2,0) or die "\n$0: Could not open ${outname}";
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$, = ""; #output field separator
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$\ = ""; #output record separator
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#set .rel.stab->type to rel
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OutBin($shoff + ($shentsize * $relnum) + 4,9);
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#set .rel.stab->link to .symtab
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OutBin($shoff + ($shentsize * $relnum) + 24,$symtabnum);
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#set .rel.stab->info to .stab
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OutBin($shoff + ($shentsize * $relnum) + 28,$stabnum);
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#set .rel.stab->entsize to 8
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OutBin($shoff + ($shentsize * $relnum) + 36,8);
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#set .stab->link to .stabstr
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OutBin($shoff + ($shentsize * $stabnum) + 24,$stabstrnum);
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#set .stab->entsize to 12
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OutBin($shoff + ($shentsize * $stabnum) + 36,12);
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#set .stabstr->type to strtab
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OutBin($shoff + ($shentsize * $stabstrnum) + 4,3);
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close FINAL;
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#Date: 17 Mar 2002 15:51:20 -0800
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#From: kitsred@hotmail.com (kired)
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#Newsgroups: alt.lang.asm
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