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Copy pathFindMethodsWhichMessageSelector-i386.pl
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Copy pathFindMethodsWhichMessageSelector-i386.pl
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145 lines (109 loc) · 2.39 KB
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#!/usr/bin/perl
use strict;
use warnings;
if ( scalar(@ARGV) != 2 )
{
print "Usage: $0 <i386 Objective-C Library> <Objective-C Selector>\n";
exit(255);
}
my $szLib = $ARGV[0];
my $szSelector = $ARGV[1];
my %hClassRefs = ();
print "\nSelector \"$szSelector\" implementation found at:\n";
open(OTOOL, "xcrun otool -arch i386 -v -s __OBJC __message_refs $szLib|");
while (<OTOOL>)
{
chomp;
if ( m/^([\da-fA-F]{8})\s+__TEXT:__cstring:($szSelector)$/ )
{
$hClassRefs{hex($1)} = $2;
print " $_";
}
}
close(OTOOL);
open(OTOOL, "xcrun otool -arch i386 -v -s __DATA __objc_selrefs $szLib|");
while (<OTOOL>)
{
chomp;
if ( m/^([\da-fA-F]{8})\s+__TEXT:__objc_methname:($szSelector)$/ )
{
$hClassRefs{hex($1)} = $2;
print " $_";
}
}
close(OTOOL);
print "\n\nSelector \"$szSelector\" appears to be called from the following methods:\n";
my $szLastFunctionName = "";
my @aszLastFunctionBody = ();
open(OTOOL, "xcrun otool -arch i386 -v -V -t $szLib|");
while (<OTOOL>)
{
chomp;
if ( m/^([\da-fA-F]{8})\s+/ )
{
push(@aszLastFunctionBody, $_);
}
else
{
if ( scalar(@aszLastFunctionBody) > 0 )
{
if ( CheckFunctionForSymbolReference(@aszLastFunctionBody) )
{
print " $szLastFunctionName\n";
}
}
$szLastFunctionName = $_;
@aszLastFunctionBody = ();
}
}
if ( scalar(@aszLastFunctionBody) > 0 )
{
if ( CheckFunctionForSymbolReference(@aszLastFunctionBody) )
{
print "$szLastFunctionName\n";
}
}
close(OTOOL);
print "\n";
sub CheckFunctionForSymbolReference
{
my @aszFunctionBody = @_;
my $i = 0;
my $szPICReg = "";
my $iPICRegVal = 0;
for (; $i < scalar(@aszFunctionBody); $i++)
{
my $szInst = $aszFunctionBody[$i];
if ( $szInst =~ m/^([\da-fA-F]{8})\s+calll\s+0x([\da-fA-F]{1,8})/ )
{
my $iCallAdd = hex($2);
last if ( ($i + 1) >= scalar(@aszFunctionBody) );
my $szNextInst = $aszFunctionBody[$i + 1];
if ( $szNextInst =~ m/^([\da-fA-F]{8})\s+popl\s+(%[^\s]*)/ )
{
my $iAdd = hex($1);
if ( $iCallAdd == $iAdd )
{
$i++;
$szPICReg = $2;
$iPICRegVal = $iAdd;
last;
}
}
}
}
for (; $i < scalar(@aszFunctionBody); $i++)
{
my $szInst = $aszFunctionBody[$i];
if ( $szInst =~ m/^([\da-fA-F]{8})\s+movl\s+0x([\da-fA-F]{1,8})\($szPICReg\),/ )
{
my $iAddOffset = hex($2);
my $iAbsAdd = $iAddOffset + $iPICRegVal;
if ( exists($hClassRefs{$iAbsAdd}) )
{
return 1;
}
}
}
return 0;
}