From abc119cc604046c3d007f4364c5be19c2a1c639e Mon Sep 17 00:00:00 2001
From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 2 Feb 2022 09:38:38 +0300
Subject: Fix SIGSEGV while marking some special proc mapping (E2K)

Issue #413 (bdwgc).

* dyn_load.c [(SCO_ELF || DGUX || HURD || NACL || __ELF__ && (LINUX
|| FREEBSD || NETBSD || OPENBSD)) && USE_PROC_FOR_LIBRARIES && E2K
&& __ptr64__] (GC_register_map_entries): Skip c2fffffff000-c30000000000
anonymous writable section; add TODO.
---
 dyn_load.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'dyn_load.c')

diff --git a/dyn_load.c b/dyn_load.c
index f14242f9..ab730805 100644
--- a/dyn_load.c
+++ b/dyn_load.c
@@ -334,6 +334,12 @@ STATIC void GC_register_map_entries(const char *maps)
                 /* Stack mapping; discard       */
                 continue;
             }
+#           if defined(E2K) && defined(__ptr64__)
+              /* TODO: avoid hard-coded addresses */
+              if ((word)start == 0xc2fffffff000UL
+                  && (word)end == 0xc30000000000UL && path[0] == '\n')
+                continue; /* discard some special mapping */
+#           endif
             if (path[0] == '[' && strncmp(path+1, "heap]", 5) != 0)
               continue; /* discard if a pseudo-path unless "[heap]" */
 
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