mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Roland McGrath](/assets/img/avatar_default.png)
GCC 4 emits more DWARF debugging information than before and there is now a .debug_loc section as well. This causes "make buildcheck" to fail. Rather than just add that one to the special case list, I used a regexp to ignore any .debug_ANYTHING sections in case more show up in the future. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
106 lines
3 KiB
Perl
106 lines
3 KiB
Perl
#!/usr/bin/perl -w
|
|
#
|
|
# reference_discarded.pl (C) Keith Owens 2001 <kaos@ocs.com.au>
|
|
#
|
|
# Released under GPL V2.
|
|
#
|
|
# List dangling references to vmlinux discarded sections.
|
|
|
|
use strict;
|
|
die($0 . " takes no arguments\n") if($#ARGV >= 0);
|
|
|
|
my %object;
|
|
my $object;
|
|
my $line;
|
|
my $ignore;
|
|
my $errorcount;
|
|
|
|
$| = 1;
|
|
|
|
# printf("Finding objects, ");
|
|
open(OBJDUMP_LIST, "find . -name '*.o' | xargs objdump -h |") || die "getting objdump list failed";
|
|
while (defined($line = <OBJDUMP_LIST>)) {
|
|
chomp($line);
|
|
if ($line =~ /:\s+file format/) {
|
|
($object = $line) =~ s/:.*//;
|
|
$object{$object}->{'module'} = 0;
|
|
$object{$object}->{'size'} = 0;
|
|
$object{$object}->{'off'} = 0;
|
|
}
|
|
if ($line =~ /^\s*\d+\s+\.modinfo\s+/) {
|
|
$object{$object}->{'module'} = 1;
|
|
}
|
|
if ($line =~ /^\s*\d+\s+\.comment\s+/) {
|
|
($object{$object}->{'size'}, $object{$object}->{'off'}) = (split(' ', $line))[2,5];
|
|
}
|
|
}
|
|
close(OBJDUMP_LIST);
|
|
# printf("%d objects, ", scalar keys(%object));
|
|
$ignore = 0;
|
|
foreach $object (keys(%object)) {
|
|
if ($object{$object}->{'module'}) {
|
|
++$ignore;
|
|
delete($object{$object});
|
|
}
|
|
}
|
|
# printf("ignoring %d module(s)\n", $ignore);
|
|
|
|
# Ignore conglomerate objects, they have been built from multiple objects and we
|
|
# only care about the individual objects. If an object has more than one GCC:
|
|
# string in the comment section then it is conglomerate. This does not filter
|
|
# out conglomerates that consist of exactly one object, can't be helped.
|
|
|
|
# printf("Finding conglomerates, ");
|
|
$ignore = 0;
|
|
foreach $object (keys(%object)) {
|
|
if (exists($object{$object}->{'off'})) {
|
|
my ($off, $size, $comment, $l);
|
|
$off = hex($object{$object}->{'off'});
|
|
$size = hex($object{$object}->{'size'});
|
|
open(OBJECT, "<$object") || die "cannot read $object";
|
|
seek(OBJECT, $off, 0) || die "seek to $off in $object failed";
|
|
$l = read(OBJECT, $comment, $size);
|
|
die "read $size bytes from $object .comment failed" if ($l != $size);
|
|
close(OBJECT);
|
|
if ($comment =~ /GCC\:.*GCC\:/m || $object =~ /built-in\.o/) {
|
|
++$ignore;
|
|
delete($object{$object});
|
|
}
|
|
}
|
|
}
|
|
# printf("ignoring %d conglomerate(s)\n", $ignore);
|
|
|
|
# printf("Scanning objects\n");
|
|
$errorcount = 0;
|
|
foreach $object (keys(%object)) {
|
|
my $from;
|
|
open(OBJDUMP, "objdump -r $object|") || die "cannot objdump -r $object";
|
|
while (defined($line = <OBJDUMP>)) {
|
|
chomp($line);
|
|
if ($line =~ /RELOCATION RECORDS FOR /) {
|
|
($from = $line) =~ s/.*\[([^]]*).*/$1/;
|
|
}
|
|
if (($line =~ /\.text\.exit$/ ||
|
|
$line =~ /\.exit\.text$/ ||
|
|
$line =~ /\.data\.exit$/ ||
|
|
$line =~ /\.exit\.data$/ ||
|
|
$line =~ /\.exitcall\.exit$/) &&
|
|
($from !~ /\.text\.exit$/ &&
|
|
$from !~ /\.exit\.text$/ &&
|
|
$from !~ /\.data\.exit$/ &&
|
|
$from !~ /\.exit\.data$/ &&
|
|
$from !~ /\.altinstructions$/ &&
|
|
$from !~ /\.pdr$/ &&
|
|
$from !~ /\.debug_.*$/ &&
|
|
$from !~ /\.exitcall\.exit$/ &&
|
|
$from !~ /\.eh_frame$/ &&
|
|
$from !~ /\.stab$/)) {
|
|
printf("Error: %s %s refers to %s\n", $object, $from, $line);
|
|
$errorcount = $errorcount + 1;
|
|
}
|
|
}
|
|
close(OBJDUMP);
|
|
}
|
|
# printf("Done\n");
|
|
|
|
exit(0);
|