linux-kernel - [PATCH v6 5/5] export_report: Use new version info format

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Message-ID: <20241015231925.3854230-6-mmaurer@google.com>
Date: Tue, 15 Oct 2024 23:19:00 +0000
From: Matthew Maurer <mmaurer@...gle.com>
To: masahiroy@...nel.org, ndesaulniers@...gle.com, ojeda@...nel.org, 
	gary@...yguo.net, mcgrof@...nel.org, Alex Gaynor <alex.gaynor@...il.com>
Cc: rust-for-linux@...r.kernel.org, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org, neal@...pa.dev, marcan@...can.st, j@...nau.net, 
	asahi@...ts.linux.dev, linux-modules@...r.kernel.org, samitolvanen@...gle.com, 
	Matthew Maurer <mmaurer@...gle.com>, Boqun Feng <boqun.feng@...il.com>, 
	"Björn Roy Baron" <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>
Subject: [PATCH v6 5/5] export_report: Use new version info format

The new version info format has a superset of symbols in the old format.
Since this is a tool for in-tree modules, we don't need to parse the old
one with this tool any longer.

Even if we build without CONFIG_EXTENDED_MODVERSIONS, these are still in
the `.mod.c` file. Their presence in the final module is controlled by
conditional compilation inside the at file.

Signed-off-by: Matthew Maurer <mmaurer@...gle.com>
---
 scripts/export_report.pl | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/scripts/export_report.pl b/scripts/export_report.pl
index dcef915405f3..6a37df6f947f 100755
--- a/scripts/export_report.pl
+++ b/scripts/export_report.pl
@@ -114,31 +114,29 @@ foreach my $thismod (@allcfiles) {
 	}
 
 	my $state=0;
+	# State map:
+	# 0 - Looking for names
+	# 1 - Scanning names
+	# 2 - Done
 	while ( <$module> ) {
 		chomp;
 		if ($state == 0) {
-			$state = 1 if ($_ =~ /static const struct modversion_info/);
+			$state = 1 if ($_ =~ /__used __section\("__version_ext_names"\)/);
 			next;
 		}
 		if ($state == 1) {
-			$state = 2 if ($_ =~ /__used __section\("__versions"\)/);
-			next;
-		}
-		if ($state == 2) {
-			if ( $_ =~ /};/ ) {
-				$state = 3;
-				next;
-			}
-			if ( $_ !~ /0x[0-9a-f]+,/ ) {
+			if ( $_ =~ /;/ ) {
+				$state = 2;
 				next;
 			}
-			my $sym = (split /([,"])/,)[4];
+			$_ =~ /"(.*)\\0"/;
+			my $sym = $1;
 			my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}};
 			$SYMBOL{ $sym } =  [ $module, $value+1, $symbol, $gpl];
 			push(@{$MODULE{$thismod}} , $sym);
 		}
 	}
-	if ($state != 3) {
+	if ($state != 2) {
 		warn "WARNING:$thismod is not built with CONFIG_MODVERSIONS enabled\n";
 		$modversion_warnings++;
 	}
-- 
2.47.0.rc1.288.g06298d1525-goog