mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
53e88e03e6
From: Randy Dunlap <rddunlap@osdl.org> Reduce noise in 'make buildcheck' that is caused by CONFIG_DEBUG_INFO=y. Signed-off-by: Randy Dunlap <rddunlap@osdl.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
109 lines
3.3 KiB
Perl
109 lines
3.3 KiB
Perl
#!/usr/bin/perl -w
|
|
#
|
|
# reference_init.pl (C) Keith Owens 2002 <kaos@ocs.com.au>
|
|
#
|
|
# List references to vmlinux init sections from non-init sections.
|
|
|
|
# Unfortunately I had to exclude references from read only data to .init
|
|
# sections, almost all of these are false positives, they are created by
|
|
# gcc. The downside of excluding rodata is that there really are some
|
|
# user references from rodata to init code, e.g. drivers/video/vgacon.c
|
|
#
|
|
# const struct consw vga_con = {
|
|
# con_startup: vgacon_startup,
|
|
#
|
|
# where vgacon_startup is __init. If you want to wade through the false
|
|
# positives, take out the check for rodata.
|
|
|
|
use strict;
|
|
die($0 . " takes no arguments\n") if($#ARGV >= 0);
|
|
|
|
my %object;
|
|
my $object;
|
|
my $line;
|
|
my $ignore;
|
|
|
|
$| = 1;
|
|
|
|
printf("Finding objects, ");
|
|
open(OBJDUMP_LIST, "find . -name '*.o' | xargs objdump -h |") || die "getting objdump list failed";
|
|
while (defined($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");
|
|
foreach $object (sort(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 =~ /\.init$/ || $line =~ /\.init\./) &&
|
|
($from !~ /\.init$/ &&
|
|
$from !~ /\.init\./ &&
|
|
$from !~ /\.stab$/ &&
|
|
$from !~ /\.rodata$/ &&
|
|
$from !~ /\.text\.lock$/ &&
|
|
$from !~ /\.pci_fixup_header$/ &&
|
|
$from !~ /\.pci_fixup_final$/ &&
|
|
$from !~ /\.pdr$/ &&
|
|
$from !~ /\__param$/ &&
|
|
$from !~ /\.altinstructions/ &&
|
|
$from !~ /\.eh_frame/ &&
|
|
$from !~ /\.debug_/)) {
|
|
printf("Error: %s %s refers to %s\n", $object, $from, $line);
|
|
}
|
|
}
|
|
close(OBJDUMP);
|
|
}
|
|
printf("Done\n");
|