From 52653ec82bcc8e10fee9b6d9997b2de41a22a93a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 24 Jul 2024 17:35:47 +0200
Subject: [PATCH] start: Align the stack on powerpc just in case.

The kernel does this as required, but we cannot trust dynamic linkers to do it.
---
 lib/std/start.zig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/std/start.zig b/lib/std/start.zig
index 35485a6995..015f2c077f 100644
--- a/lib/std/start.zig
+++ b/lib/std/start.zig
@@ -351,8 +351,9 @@ fn _start() callconv(.Naked) noreturn {
             \\ j %[posixCallMainAndExit]
             ,
             .powerpc, .powerpcle =>
-            // Setup the initial stack frame and clear the back chain pointer.
+            // Set up the initial stack frame, and clear the back chain pointer.
             \\ mr 3, 1
+            \\ clrrwi 1, 1, 4
             \\ li 0, 0
             \\ stwu 1, -16(1)
             \\ stw 0, 0(1)
@@ -360,7 +361,7 @@ fn _start() callconv(.Naked) noreturn {
             \\ b %[posixCallMainAndExit]
             ,
             .powerpc64, .powerpc64le =>
-            // Setup the initial stack frame and clear the back chain pointer.
+            // Set up the ToC and initial stack frame, and clear the back chain pointer.
             \\ addis 2, 12, .TOC. - %[_start]@ha
             \\ addi 2, 2, .TOC. - %[_start]@l
             \\ mr 3, 1