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#!/usr/bin/perl
use strict;
my $in = shift;
my $tls_offsets = shift;
my $out = shift;
my $sigfe = shift;
$main::first = 0;
if (!defined($in) || !defined($out) || !defined($sigfe)) {
die "usage: $0 deffile.in cygtls.h deffile.def sigfe.s\n";
}
require $tls_offsets;
open(IN, $in) or die "$0: couldn't open \"$in\" - $!\n";
my @top = ();
while (<IN>) {
push(@top, $_);
last if /^\s*exports\s*$/i;
}
my $libline = <IN>;
my @in = <IN>;
close(IN);
my %sigfe = ();
my @data = ();
my @nosigfuncs = ();
my @out = ();
for (@in) {
/\sDATA$/o and do {
push(@data, $_);
next;
};
chomp;
if (/=/o) {
if (s/\s+NOSIGFE\s*$//) {
} elsif (s/ SIGFE$//) {
my $func = (split(' '))[2];
$sigfe{$func} = '_sigfe_' . $func;
}
} else {
my ($func, $sigfe) = m%^\s*(\S+)(?:\s+((?:NO)?SIGR?FE))?$%o;
if (defined($sigfe) && $sigfe =~ /^NO/o) {
$_ = $func;
} else {
$sigfe ||= 'sigfe';
$_ = '_' . lc($sigfe) . '_' . $func;
$sigfe{$func} = $_;
$_ = $func . ' = ' . $_;
}
}
s/(\S)\s+(\S)/$1 $2/go;
s/(\S)\s+$/$1/o;
s/^\s+(\S)/$1/o;
push(@out, $_ . "\n");
}
for (@out) {
my ($alias, $func) = /^(\S+) = (\S+)\s*$/o;
$_ = $alias . ' = ' . $sigfe{$func} . "\n"
if defined($func) && $sigfe{$func};
}
open(OUT, '>', $out) or die "$0: couldn't open \"$out\" - $!\n";
print OUT @top, @data, @out;
close OUT;
open(SIGFE, '>', $sigfe) or die "$0: couldn't open sigfe file \"$sigfe\" - $!\n";
for my $k (sort keys %sigfe) {
print SIGFE fefunc($k, $sigfe{$k});
}
close SIGFE;
sub fefunc {
my $func = '_' . shift;
my $fe = '_' . shift;
my $extra;
my $res = <<EOF;
.extern _siglist_index
.extern _siglist
.extern $func
.global $fe
$fe:
pushl \$$func
jmp __sigfe
EOF
if (!$main::first++) {
$res = <<EOF . longjmp () . $res;
.text
.global __sigbe
.global _sigreturn
.global _sigdelayed
.stabs "_sigfe:F(0,1)",36,0,0,__sigbe
__sigfe:
pushl %edx
movl %fs:4,%eax
movl \$4,%edx
xadd %edx,$tls::stackptr(%eax)
leal __sigbe,%eax
xchg %eax,8(%esp)
movl %eax,(%edx)
popl %edx
ret
.stabs "_sigbe:F(0,1)",36,0,0,__sigbe
__sigbe:
pushl %eax
pushl %edx
movl \$-4,%edx
1: movl %fs:4,%eax
xadd %edx,$tls::stackptr(%eax)
xorl %eax,%eax
lock xchg %eax,-4(%edx)
testl %eax,%eax
jnz 2f
call _low_priority_sleep
xorl %edx,%edx
jmp 1b
2: xchg %eax,4(%esp)
popl %edx
ret
.stabs "sigreturn:F(0,1)",36,0,0,_sigreturn
_sigreturn:
addl \$4,%esp # Remove argument
call _set_process_mask\@4
movl %fs:4,%ebx
cmpl \$0,$tls::sig(%ebx) # Did a signal come in?
jnz 3f # Yes, if non-zero
1: popl %edx # saved errno
testl %edx,%edx # Is it < 0
jl 2f # yup. ignore it
movl $tls::errno_addr(%ebx),%eax
movl %edx,(%eax)
2: popl %eax
popl %ebx
popl %ecx
popl %edx
popl %edi
popl %esi
popf
popl %ebp
jmp __sigbe
.stabs "sigdelayed:F(0,1)",36,0,0,_sigdelayed
_sigdelayed:
pushl %ebp
movl %esp,%ebp
pushf
pushl %esi
pushl %edi
pushl %edx
pushl %ecx
pushl %ebx
pushl %eax
movl %fs:4,%ebx
pushl $tls::saved_errno(%ebx) # saved errno
3: pushl $tls::oldmask(%ebx) # oldmask
pushl $tls::sig(%ebx) # signal argument
pushl \$_sigreturn
call _reset_signal_arrived\@0
pushl $tls::func(%ebx) # signal func
pushl $tls::newmask(%ebx) # newmask - eaten by set_process_mask
call _set_process_mask\@4
movl \$0,$tls::sig(%ebx) # zero the signal number as a
# flag to the signal handler thread
# that it is ok to set up sigsave
popl %ebx
jmp *%ebx
EOF
}
return $res;
}
sub longjmp {
return <<EOF;
.globl _longjmp
_longjmp:
pushl %ebp
movl %esp,%ebp
movl 8(%ebp),%edi
movl 12(%ebp),%eax
testl %eax,%eax
jne 0f
incl %eax
0:
movl %eax,0(%edi)
movl 24(%edi),%ebp
pushfl
popl %ebx
movw 42(%edi),%ax
movw %ax,%ss
movl 28(%edi),%esp
pushl 32(%edi)
pushl %ebx
movw 36(%edi),%ax
movw %ax,%es
movw 40(%edi),%ax
movw %ax,%gs
movl %fs:4,%eax
leal ($tls::stack)(%eax),%edx
movl %edx,($tls::stackptr)(%eax)
movl 0(%edi),%eax
movl 4(%edi),%ebx
movl 8(%edi),%ecx
movl 12(%edi),%edx
movl 16(%edi),%esi
movl 20(%edi),%edi
popfl
ret
EOF
}
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