[glibc/arm/morello/main] cheri: headers: Define {u}intptr_t and {u}intcap_t for CHERI

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=581cfdbbb8aa00ee95c3e6e8d7804ca6ee9edcc5

commit 581cfdbbb8aa00ee95c3e6e8d7804ca6ee9edcc5
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Fri Jun 11 12:52:26 2021 +0100

    cheri: headers: Define {u}intptr_t and {u}intcap_t for CHERI
    
    The CHERI pure capability programming model for C requires special
    definition of {u}intptr_t.
    
    Only the pure capability model is supported for hosted compilation,
    but for freestanding compilation there is limited support for other
    (hybrid capability) programming models too, which require new
    {u}intcap_t type definitions.

Diff:
---
 posix/bits/types.h |  4 ++++
 stdlib/stdint.h    | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/posix/bits/types.h b/posix/bits/types.h
index f912e77a02..e315dfd779 100644
--- a/posix/bits/types.h
+++ b/posix/bits/types.h
@@ -204,7 +204,11 @@ typedef __off64_t __loff_t;	/* Type of file sizes and offsets (LFS).  */
 typedef char *__caddr_t;
 
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
+#ifdef __CHERI_PURE_CAPABILITY__
+__STD_TYPE __intcap_t __intptr_t;
+#else
 __STD_TYPE __SWORD_TYPE __intptr_t;
+#endif
 
 /* Duplicate info from sys/socket.h.  */
 __STD_TYPE __U32_TYPE __socklen_t;
diff --git a/stdlib/stdint.h b/stdlib/stdint.h
index 2d666f79fd..b80b6bbac1 100644
--- a/stdlib/stdint.h
+++ b/stdlib/stdint.h
@@ -84,10 +84,22 @@ typedef unsigned long long int	uint_fast64_t;
 /* Types for `void *' pointers.  */
 #if __WORDSIZE == 64
 # ifndef __intptr_t_defined
+#  ifdef __CHERI_PURE_CAPABILITY__
+typedef __intcap_t		intptr_t;
+#  else
 typedef long int		intptr_t;
+#  endif
 #  define __intptr_t_defined
 # endif
+# ifdef __CHERI_PURE_CAPABILITY__
+typedef __uintcap_t		uintptr_t;
+# else
 typedef unsigned long int	uintptr_t;
+# endif
+# if defined __CHERI__ && !defined __CHERI_PURE_CAPABILITY__
+typedef __uintcap_t		uintcap_t;
+typedef __intcap_t		intcap_t;
+# endif
 #else
 # ifndef __intptr_t_defined
 typedef int			intptr_t;