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