From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Fri, 21 Oct 2022 11:10:11 +0000 (+0100)
Subject: aarch64: morello: define PROT_MAX
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=418ede06d733e2388decf9a2b9f60674463d14d1;p=thirdparty%2Fglibc.git

aarch64: morello: define PROT_MAX

Specifies the prot flags a mapping may gain via mprotect or MAP_FIXED.
On CHERI targets this is used to get capability with more permissions
than the original mmap protection would imply.
---

diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/mman.h b/sysdeps/unix/sysv/linux/aarch64/bits/mman.h
index d7ac2fa993e..8dbd8d6819a 100644
--- a/sysdeps/unix/sysv/linux/aarch64/bits/mman.h
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/mman.h
@@ -25,6 +25,9 @@
 
 #define PROT_BTI	0x10
 #define PROT_MTE	0x20
+#ifdef __CHERI_PURE_CAPABILITY__
+# define PROT_MAX(prot) ((prot) << 16)
+#endif
 
 #include <bits/mman-map-flags-generic.h>