[glibc/arm/morello/main] TODO(api): cheri: fix syscall return type

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e1a82e398439df8fbdb33faf540f91fd68de3c20

commit e1a82e398439df8fbdb33faf540f91fd68de3c20
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Thu Jul 14 14:22:26 2022 +0100

    TODO(api): cheri: fix syscall return type
    
    TODO: this affects API (syscall return type is long)
    so breaks portability and requires doc updates.

Diff:
---
 sysdeps/unix/sysv/linux/sysdep.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h
index 3dc2bad50e..83f2323eda 100644
--- a/sysdeps/unix/sysv/linux/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sysdep.h
@@ -35,13 +35,19 @@
   })
 #endif
 
+#ifdef __CHERI_PURE_CAPABILITY__
+# define syscall_ret_t intptr_t
+#else
+# define syscall_ret_t long
+#endif
+
 /* Define a macro which expands into the inline wrapper code for a system
    call.  It sets the errno and returns -1 on a failure, or the syscall
    return value otherwise.  */
 #undef INLINE_SYSCALL
 #define INLINE_SYSCALL(name, nr, args...)				\
   ({									\
-    long int sc_ret = INTERNAL_SYSCALL (name, nr, args);		\
+    syscall_ret_t sc_ret = INTERNAL_SYSCALL (name, nr, args);		\
     __glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (sc_ret))		\
     ? SYSCALL_ERROR_LABEL (INTERNAL_SYSCALL_ERRNO (sc_ret))		\
     : sc_ret;								\