From 89f6d00cad6bd833f8a14baa03c844a531e61d31 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Sun, 9 Aug 2026 03:04:24 +0200
Subject: [PATCH] musl: set up a proper stack frame in the parent thread in
 powerpc clone()

https://www.openwall.com/lists/musl/2026/08/09/1
---
 lib/libc/musl/src/thread/powerpc/clone.s | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/libc/musl/src/thread/powerpc/clone.s b/lib/libc/musl/src/thread/powerpc/clone.s
index 019fd62a95afc6e4cff64f0c5bce1e1d41ae33c8..29c0b2ef4e34a2b0ed04c42e6a43d1deddbb4d13 100644
--- a/lib/libc/musl/src/thread/powerpc/clone.s
+++ b/lib/libc/musl/src/thread/powerpc/clone.s
@@ -16,8 +16,9 @@ __clone:
 
 # store non-volatile regs r30, r31 on stack in order to put our
 # start func and its arg there
-stwu 30, -16(1)
-stw 31, 4(1)
+stwu 1, -16(1)
+stw 30, 8(1)
+stw 31, 12(1)
 
 # save r3 (func) into r30, and r6(arg) into r31
 mr 30, 3
@@ -51,8 +52,8 @@ cmpwi cr7, 3, 0
 # if not 0, restore stack and return
 beq cr7, 2f
 
-lwz 30, 0(1)
-lwz 31, 4(1)
+lwz 30, 8(1)
+lwz 31, 12(1)
 addi 1, 1, 16
 
 blr
-- 
2.54.0