linux-kernel - [PATCH] checkstack: add riscv support for scripts/checkstack.pl

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Message-Id: <20220713194112.15557-1-wafgo01@gmail.com>
Date:   Wed, 13 Jul 2022 21:41:10 +0200
From:   Wadim Mueller <wafgo01@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Wadim Mueller <wafgo01@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [PATCH] checkstack: add riscv support for scripts/checkstack.pl

scripts/checkstack.pl lacks support for the riscv architecture. Add
support to detect "addi sp,sp,-FRAME_SIZE" stack frame generation instruction

Signed-off-by: Wadim Mueller <wafgo01@...il.com>
---
 scripts/checkstack.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index d2c38584ece6..d48dfed6d3db 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -16,6 +16,7 @@
 #	AArch64, PARISC ports by Kyle McMartin
 #	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>
 #
 #	Usage:
 #	objdump -d vmlinux | scripts/checkstack.pl [arch]
@@ -108,6 +109,9 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
 	} elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
 		# f0019d10:       9d e3 bf 90     save  %sp, -112, %sp
 		$re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
+	} elsif ($arch =~ /^riscv(64)?$/) {
+		#ffffffff8036e868:	c2010113          	addi	sp,sp,-992
+		$re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
 	} else {
 		print("wrong or unknown architecture \"$arch\"\n");
 		exit
-- 
2.25.1