linux-kernel - [PATCH] checkstack: Add loongarch support for scripts/checkstack.pl

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Date: Sat, 16 Dec 2023 14:40:54 +0800
From: Youling Tang <youling.tang@...look.com>
To: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Huacai Chen <chenhuacai@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	Youling Tang <tangyouling@...inos.cn>
Subject: [PATCH] checkstack: Add loongarch support for scripts/checkstack.pl

From: Youling Tang <tangyouling@...inos.cn>

scripts/checkstack.pl lacks support for the loongarch architecture. Add
support to detect "addi.{w,d} $sp, $sp, -FRAME_SIZE" stack frame generation
instruction.

Signed-off-by: Youling Tang <tangyouling@...inos.cn>
---
 scripts/checkstack.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index f27d552aec43..e9d01b999b74 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -16,6 +16,7 @@
 #	sparc port by Martin Habets <errandir_news@....eclipse.co.uk>
 #	ppc64le port by Breno Leitao <leitao@...ian.org>
 #	riscv port by Wadim Mueller <wafgo01@...il.com>
+#	loongarch port by Youling Tang <tangyouling@...inos.cn>
 #
 #	Usage:
 #	objdump -d vmlinux | scripts/checkstack.pl [arch]
@@ -104,6 +105,9 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
 	} elsif ($arch =~ /^riscv(64)?$/) {
 		#ffffffff8036e868:	c2010113          	addi	sp,sp,-992
 		$re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+	} elsif ($arch =~ /^loongarch(32|64)?$/) {
+		#9000000000224708:	02ff4063		addi.d  $sp, $sp, -48(0xfd0)
+		$re = qr/.*addi\..*sp, .*sp, -([0-9]{1,8}).*/o;
 	} else {
 		print("wrong or unknown architecture \"$arch\"\n");
 		exit
-- 
2.40.0