[glibc/arm/morello/main] TODO(sprof): cheri: disable profiling shared libraries

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=010cf0128e02429c8686772f20cf80b2ca678939

commit 010cf0128e02429c8686772f20cf80b2ca678939
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Thu May 12 09:05:30 2022 +0100

    TODO(sprof): cheri: disable profiling shared libraries
    
    This is needed now to avoid referencing abort in ld.so.
    
    TODO: Fixing shared library profiling for capabilities requires
    type fixes so capabilities are not stored into shared memory
    (maybe purecap layout can match the lp64 one and then no file format
    and external tooling change is required.)
    TODO: Proper fix also depends on _dl_runtime_profile plt entry

Diff:
---
 elf/dl-profile.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/elf/dl-profile.c b/elf/dl-profile.c
index ec57e3a965..2cb66e83c6 100644
--- a/elf/dl-profile.c
+++ b/elf/dl-profile.c
@@ -182,6 +182,9 @@ static unsigned int log_hashfraction;
 void
 _dl_start_profile (void)
 {
+#ifdef __CHERI_PURE_CAPABILITY__
+  __libc_fatal ("Profiling is not supported on capability architectures.");
+#else
   char *filename;
   int fd;
   struct __stat64_t64 st;
@@ -482,6 +485,7 @@ _dl_start_profile (void)
 
   /* Turn on profiling.  */
   running = 1;
+#endif
 }