buildroot/package/libcap/0002-Support-for-__xtensa__-architecture.patch

From 9421f4ff93c341482d3aa4a0cd57aba1978bdd62 Mon Sep 17 00:00:00 2001
From: "Andrew G. Morgan" <morgan@kernel.org>
Date: Sat, 19 Apr 2025 08:00:23 -0700
Subject: [PATCH] Support for __xtensa__ architecture.

It looks like __xtensa__ defines SA_RESTORER, but my read of the
kernel code suggests that signal handling does not require it be
set. Specifically, if the SA_RESTORER flag is not set, the kernel
inserts a sys_rt_sigreturn call into the stack frame.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
Upstream: 6cdd8cd72ebcedd6b1b6c989a7e5722d5d87f35c
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
 psx/psx_calls.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/psx/psx_calls.c b/psx/psx_calls.c
index 8195964..aff105f 100644
--- a/psx/psx_calls.c
+++ b/psx/psx_calls.c
@@ -49,7 +49,8 @@
     || defined(__powerpc__) || defined(__s390__) || defined(__riscv) \
     || defined(__alpha__) || defined(__hppa__) || defined(__sh__) \
     || defined(__m68k__) || defined(__sparc__) || defined(__arc__) \
-    || defined(__microblaze__) || defined(__or1k__)
+    || defined(__microblaze__) || defined(__or1k__) \
+    || defined(__xtensa__)
 
 #undef _NSIG
 #undef _NSIG_BPW
@@ -69,8 +70,7 @@
 #define _NSIG_WORDS  (_NSIG / _NSIG_BPW)
 
 #if defined(__x86_64__) || defined(__i386__) \
-    || defined(__arm__) \
-    || defined(__powerpc__) \
+    || defined(__arm__) || defined(__powerpc__) \
     || defined(__arc__)
 /* field used */
 #define SA_RESTORER  0x04000000
@@ -78,8 +78,9 @@
 
 #if defined(SA_RESTORER) \
     || defined(__aarch64__) \
-    || defined(__m68k__) || defined(__sh__) || defined(__sparc__) \
-    || defined(__s390__) || defined(__sparc__)
+    || defined(__m68k__) || defined(__sh__) \
+    || defined(__s390__) || defined(__sparc__) \
+    || defined(__xtensa__)
 /* field defined */
 #define _HAS_SA_RESTORER   void *sa_restorer;
 #else
@@ -93,7 +94,7 @@ typedef struct {
 #define sigset_t psx_sigset_t
 
 struct psx_sigaction {
-#if defined(__m68k__) || defined(__alpha__)
+#if defined(__m68k__) || defined(__alpha__) || defined(__xtensa__)
     void *sa_handler;
     sigset_t sa_mask;
     unsigned long sa_flags;
-- 
2.49.0