[PATCH v2] hppa: Wire up cacheflush syscall

[PATCH v2] hppa: Wire up cacheflush syscall

[Helge Deller]

The hppa Linux kernel supports the cacheflush() syscall
since version 6.5. This adds the glibc syscall wrapper.

Signed-off-by: Helge Deller <deller@gmx.de>

---
v2: This patch was too late in release cycle for GLIBC_2.40,
    so Update now to GLIBC_2.41 instead.


diff --git a/sysdeps/unix/sysv/linux/hppa/Makefile b/sysdeps/unix/sysv/linux/hppa/Makefile
index 2e031e2f8a..9eebe8e0e7 100644
--- a/sysdeps/unix/sysv/linux/hppa/Makefile
+++ b/sysdeps/unix/sysv/linux/hppa/Makefile
@@ -15,6 +15,11 @@ test-xfail-check-wx-segment = *
 
 endif # $(subdir) == elf
 
+ifeq ($(subdir),misc)
+sysdep_routines += cacheflush
+sysdep_headers += sys/cachectl.h
+endif
+
 ifeq ($(subdir),debug)
 test-xfail-tst-ssp-1 = $(have-ssp)
 endif # $(subdir) == debug
diff --git a/sysdeps/unix/sysv/linux/hppa/Versions b/sysdeps/unix/sysv/linux/hppa/Versions
index 78528e5fa2..1f83840d2f 100644
--- a/sysdeps/unix/sysv/linux/hppa/Versions
+++ b/sysdeps/unix/sysv/linux/hppa/Versions
@@ -23,4 +23,7 @@ libc {
   GLIBC_2.19 {
     fanotify_mark;
   }
+  GLIBC_2.41 {
+    cacheflush;
+  }
 }
diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
index 8de7644a59..306b90c8b5 100644
--- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
@@ -2823,6 +2823,7 @@ GLIBC_2.4 unlinkat F
 GLIBC_2.4 unshare F
 GLIBC_2.41 sched_getattr F
 GLIBC_2.41 sched_setattr F
+GLIBC_2.41 cacheflush F
 GLIBC_2.5 __readlinkat_chk F
 GLIBC_2.5 inet6_opt_append F
 GLIBC_2.5 inet6_opt_find F
diff --git a/sysdeps/unix/sysv/linux/hppa/sys/cachectl.h b/sysdeps/unix/sysv/linux/hppa/sys/cachectl.h
new file mode 100644
index 0000000000..16e47d1329
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/hppa/sys/cachectl.h
@@ -0,0 +1,36 @@
+/* HPPA cache flushing interface.
+   Copyright (C) 2018-2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_CACHECTL_H
+#define _SYS_CACHECTL_H 1
+
+#include <features.h>
+
+/* Get the kernel definition for the op bits.  */
+#include <asm/cachectl.h>
+
+__BEGIN_DECLS
+
+#ifdef __USE_MISC
+extern int cacheflush (void *__addr, const int __nbytes,
+		       const int __op) __THROW;
+#endif
+
+__END_DECLS
+
+#endif /* sys/cachectl.h */
diff --git a/sysdeps/unix/sysv/linux/hppa/syscalls.list b/sysdeps/unix/sysv/linux/hppa/syscalls.list
index 12e4adeccc..b3020114d6 100644
--- a/sysdeps/unix/sysv/linux/hppa/syscalls.list
+++ b/sysdeps/unix/sysv/linux/hppa/syscalls.list
@@ -8,5 +8,6 @@ listen		-	listen		i:ii	__listen	listen
 shutdown	-	shutdown	i:ii	__shutdown	shutdown
 socket		-	socket		i:iii	__socket	socket
 socketpair	-	socketpair	i:iiif	__socketpair	socketpair
+cacheflush	-	cacheflush	i:pii	_flush_cache	cacheflush
 
 personality	EXTRA	personality	Ei:i	__personality	personality