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#************************************************************************
#* *
#* \section[Driver-obj-splitting]{Splitting into many \tr{.o} files (for libraries)}
#* *
#************************************************************************
$TargetPlatform = $TARGETPLATFORM;
($Pgm = $0) =~ s|.*/||;
$ifile = $ARGV[0];
$Tmp_prefix = $ARGV[1];
$Output = $ARGV[2];
&split_asm_file($ifile);
open(OUTPUT, '>', $Output) || &tidy_up_and_die(1,"$Pgm: failed to open `$Output' (to write)\n");
print OUTPUT "$NoOfSplitFiles\n";
close(OUTPUT);
exit(0);
sub split_asm_file {
(my $asm_file,) = @_;
my @pieces = ();
open(TMPI, '<', $asm_file) || &tidy_up_and_die(1,"$Pgm: failed to open `$asm_file' (to read)\n");
$octr = 0; # output file counter
%LocalConstant = (); # we have to subvert C compiler's commoning-up of constants...
$s_stuff = &ReadTMPIUpToAMarker( '', $octr );
# that first stuff is a prologue for all .s outputs
$prologue_stuff = &process_asm_block ( $s_stuff );
# $_ already has some of the next stuff in it...
# &tidy_up_and_die(1,"$Pgm: no split markers in .s file!\n")
# if $prologue_stuff eq $s_stuff;
while ( $_ ne '' ) { # not EOF
$octr++;
# grab and de-mangle a section of the .s file...
$s_stuff = &ReadTMPIUpToAMarker ( $_, $octr );
$pieces[$octr] = &process_asm_block ( $s_stuff );
}
# Make sure that we still have some output when the input file is empty
if ($octr == 0) {
$octr = 1;
$pieces[$octr] = '';
}
$NoOfSplitFiles = $octr;
if ($pieces[$NoOfSplitFiles] =~ /(\n[ \t]*\.section[ \t]+\.note\.GNU-stack,[^\n]*\n)/m) {
$note_gnu_stack = $1;
for $octr (1..($NoOfSplitFiles - 1)) {
$pieces[$octr] .= $note_gnu_stack;
}
}
for $octr (1..$NoOfSplitFiles) {
# output to a file of its own
# open a new output file...
$ofname = "${Tmp_prefix}__${octr}.s";
open(OUTF, '>', $ofname) || die "$Pgm: can't open output file: $ofname\n";
print OUTF $prologue_stuff;
print OUTF $pieces[$octr];
close(OUTF)
|| &tidy_up_and_die(1,"$Pgm:Failed writing ${Tmp_prefix}__${octr}.s\n");
}
close(TMPI) || &tidy_up_and_die(1,"Failed reading $asm_file\n");
}
sub ReadTMPIUpToAMarker {
(my $str, my $count) = @_; # already read bits
for ( $_ = <TMPI>; $_ ne '' && ! /_?__stg_split_marker/m; $_ = <TMPI> ) {
$str .= $_;
}
# if not EOF, then creep forward until next "real" line
# (throwing everything away).
# that first "real" line will stay in $_.
# This loop is intended to pick up the body of the split_marker function
while ($_ ne '' && (/_?__stg_split_marker/m
|| /^L[^C].*:$/m
|| /\t\.frame/m
# || /\t\.end/ NOT! Let the split_marker regexp catch it
# || /\t\.ent/ NOT! Let the split_marker regexp catch it
|| /^\s+(save|retl?|restore|nop)/m)) {
$_ = <TMPI>;
}
print STDERR "### BLOCK:$count:\n$str" if $Dump_asm_splitting_info;
# return str
$str =~ tr/\r//d if $TargetPlatform =~ /-mingw32$/m; # in case Perl doesn't convert line endings
$str;
}
=pod
We must (a)~strip the marker off the block, (b)~record any literal C
constants that are defined here, and (c)~inject copies of any C constants
that are used-but-not-defined here.
=cut
sub process_asm_block {
local($str) = @_;
return(&process_asm_block_sparc($str)) if $TargetPlatform =~ /^sparc-/m;
return(&process_asm_block_iX86($str)) if $TargetPlatform =~ /^i[34]86-/m;
return(&process_asm_block_x86_64($str)) if $TargetPlatform =~ /^x86_64-/m;
return(&process_asm_block_powerpc_linux($str))
if $TargetPlatform =~ /^powerpc-[^-]+-linux/m;
# otherwise...
&tidy_up_and_die(1,"$Pgm: no process_asm_block for $TargetPlatform\n");
}
sub process_asm_block_sparc {
local($str) = @_;
# strip the marker
$str =~ s/(\.text\n\t\.align .\n)\t\.global\s+.*_?__stg_split_marker.*\n\t\.proc.*\n/$1/m;
$str =~ s/(\t\.align .\n)\t\.global\s+.*_?__stg_split_marker.*\n\t\.proc.*\n/$1/m;
# remove/record any literal constants defined here
while ( $str =~ /(\t\.align .\n\.?(L?LC\d+):\n(\t\.asci[iz].*\n)+)/m ) {
local($label) = $2;
local($body) = $1;
&tidy_up_and_die(1,"Local constant label $label already defined!\n")
if $LocalConstant{$label};
$LocalConstant{$label} = $body;
$str =~ s/\t\.align .\n\.?LL?C\d+:\n(\t\.asci[iz].*\n)+//m;
}
# inject definitions for any local constants now used herein
foreach $k (keys %LocalConstant) {
if ( $str =~ /\b$k\b/m ) {
$str = $LocalConstant{$k} . $str;
}
}
print STDERR "### STRIPPED BLOCK (sparc):\n$str" if $Dump_asm_splitting_info;
$str;
}
sub process_asm_block_iX86 {
(my $str,) = @_;
# strip the marker
$str =~ s/(\.text\n\t\.align .(?:,0x90)?\n)\.globl\s+.*_?__stg_split_marker.*\n/$1/m;
$str =~ s/(\t\.align .(?:,0x90)?\n)\.globl\s+.*_?__stg_split_marker.*\n/$1/m;
# it seems prudent to stick on one of these:
$str = "\.text\n\t.align 4\n" . $str;
# remove/record any literal constants defined here
# [perl made uglier to work around the perl 5.7/5.8 bug documented at
# http://bugs6.perl.org/rt2/Ticket/Display.html?id=1760 and illustrated
# by the seg fault of perl -e '("x\n" x 5000) =~ /(.*\n)+/'
# -- ccshan 2002-09-05]
while ( ($str =~ /((?:^|\.)(LC\d+):\n(\t\.(ascii|string).*\n|\s*\.byte.*\n){1,100})/m )) {
local($label) = $2;
local($body) = $1;
local($prefix, $suffix) = ($`, $');
&tidy_up_and_die(1,"Local constant label $label already defined!\n")
if $LocalConstant{$label};
while ( $suffix =~ /^((\t\.(ascii|string).*\n|\s*\.byte.*\n){1,100})/ ) {
$body .= $1;
$suffix = $';
}
$LocalConstant{$label} = $body;
$str = $prefix . $suffix;
}
# inject definitions for any local constants now used herein
foreach $k (keys %LocalConstant) {
if ( $str =~ /\b$k\b/m ) {
$str = $LocalConstant{$k} . $str;
}
}
print STDERR "### STRIPPED BLOCK (iX86):\n$str" if $Dump_asm_splitting_info;
$str;
}
sub process_asm_block_x86_64 {
local($str) = @_;
# remove/record any literal constants defined here
# [perl made uglier to work around the perl 5.7/5.8 bug documented at
# http://bugs6.perl.org/rt2/Ticket/Display.html?id=1760 and illustrated
# by the seg fault of perl -e '("x\n" x 5000) =~ /(.*\n)+/'
# -- ccshan 2002-09-05]
while ( ($str =~ /((?:^|\.)(LC\d+):\n(\t\.(ascii|string).*\n|\s*\.byte.*\n){1,100})/m )) {
local($label) = $2;
local($body) = $1;
local($prefix, $suffix) = ($`, $');
&tidy_up_and_die(1,"Local constant label $label already defined!\n")
if $LocalConstant{$label};
while ( $suffix =~ /^((\t\.(ascii|string).*\n|\s*\.byte.*\n){1,100})/ ) {
$body .= $1;
$suffix = $';
}
$LocalConstant{$label} = $body;
$str = $prefix . $suffix;
}
# inject definitions for any local constants now used herein
foreach $k (keys %LocalConstant) {
if ( $str =~ /\b$k\b/m ) {
$str = $LocalConstant{$k} . $str;
}
}
print STDERR "### STRIPPED BLOCK (x86_64):\n$str" if $Dump_asm_splitting_info;
$str;
}
sub process_asm_block_powerpc_linux {
local($str) = @_;
# strip the marker
$str =~ s/__stg_split_marker.*\n//m;
# remove/record any literal constants defined here
while ( $str =~ s/^(\s+.section\s+\.rodata\n\s+\.align.*\n(\.LC\d+):\n(\s\.(byte|short|long|quad|2byte|4byte|8byte|fill|space|ascii|string).*\n)+)//m ) {
local($label) = $2;
local($body) = $1;
&tidy_up_and_die(1,"Local constant label $label already defined!\n")
if $LocalConstant{$label};
$LocalConstant{$label} = $body;
}
# inject definitions for any local constants now used herein
foreach $k (keys %LocalConstant) {
if ( $str =~ /[\s,]$k\b/m ) {
$str = $LocalConstant{$k} . $str;
}
}
print STDERR "### STRIPPED BLOCK (powerpc linux):\n$str" if $Dump_asm_splitting_info;
$str;
}
sub tidy_up_and_die {
local($return_val, $msg) = @_;
print STDERR $msg;
exit (($return_val == 0) ? 0 : 1);
}
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