From f7b32f5281888ee02f384230c48e91af2120f8b8 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Wed, 8 Feb 2023 14:02:55 -0500
Subject: [PATCH] runtime: skip darwin osinit_hack on ios

Darwin needs the osinit_hack call to fix some bugs in the Apple libc
that surface when Go programs call exec. On iOS, the functions that
osinit_hack uses are not available, so signing fails. But on iOS exec
is also unavailable, so the hack is not needed. Disable it there,
which makes signing work again.

Fixes #58323.

Change-Id: I3f1472f852bb36c06854fe1f14aa27ad450c5945
Reviewed-on: https://go-review.googlesource.com/c/go/+/466516
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Dave Anderson <danderson@tailscale.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
---
 src/runtime/sys_darwin.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/runtime/sys_darwin.go b/src/runtime/sys_darwin.go
index 8bff695f5729d8..5ba697e3047f46 100644
--- a/src/runtime/sys_darwin.go
+++ b/src/runtime/sys_darwin.go
@@ -213,7 +213,9 @@ func pthread_kill_trampoline()
 //
 //go:nosplit
 func osinit_hack() {
-	libcCall(unsafe.Pointer(abi.FuncPCABI0(osinit_hack_trampoline)), nil)
+	if GOOS == "darwin" { // not ios
+		libcCall(unsafe.Pointer(abi.FuncPCABI0(osinit_hack_trampoline)), nil)
+	}
 	return
 }
 func osinit_hack_trampoline()