From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 16 Nov 2025 00:32:22 +0000 (+0100)
Subject: hurd: Fix restoring SSE state on signal
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ce61fcf7022c5344bd8311daab312fb69506d1a7;p=thirdparty%2Fglibc.git

hurd: Fix restoring SSE state on signal

mach_port_mod_refs() needs to avoid using SSE&MMX for __sigreturn2 to be
able to use it without thrashing SSE&MMX.
---

diff --git a/sysdeps/mach/hurd/x86/Makefile b/sysdeps/mach/hurd/x86/Makefile
index 29371f6c9a..27c4b06590 100644
--- a/sysdeps/mach/hurd/x86/Makefile
+++ b/sysdeps/mach/hurd/x86/Makefile
@@ -14,3 +14,8 @@ endif
 ifeq ($(subdir),stdlib)
 gen-as-const-headers += ucontext_i.sym
 endif
+
+ifeq ($(subdir),mach)
+# Avoid SSE&MMX to avoid __sigreturn2 thrashing it
+CFLAGS-RPC_mach_port_mod_refs.c = -mno-sse -mno-mmx
+endif