[PATCH 1/4] hurd: Fix aligning signal stack pointer

[Sergey Bugaev]

Fixes 60f9bf974694d50daf58d46347b06a5975ac5ddd
"hurd: Port trampoline.c to x86_64"

Checked on x86_64-gnu.

Reported-by: Bruno Haible <bruno@clisp.org>
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
---
 sysdeps/mach/hurd/x86/trampoline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/mach/hurd/x86/trampoline.c 
b/sysdeps/mach/hurd/x86/trampoline.c
index e13c5d85..19bddad8 100644
--- a/sysdeps/mach/hurd/x86/trampoline.c
+++ b/sysdeps/mach/hurd/x86/trampoline.c
@@ -200,7 +200,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const 
struct sigaction *action
   /* Align SP at 16 bytes.  Coupled with the fact that sigreturn_addr is
      16-byte aligned within the stackframe struct, this ensures that it ends
      up on a 16-byte aligned address, as required by the ABI.  */
-  sigsp = (void *) ((uintptr_t) sigsp & 16UL);
+  sigsp = (void *) ((uintptr_t) sigsp & ~15UL);
 #endif
 
   /* Push the arguments to call `trampoline' on the stack.  */
-- 
2.40.1