File 0021-linux-user-fix-segmentation-fault-p.patch of Package qemu

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File 0021-linux-user-fix-segmentation-fault-p.patch of Package qemu (Revision d9a3c1367781be08902d97cc95e329d6)

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From d9710a8b8c7a8118d93ae3e8eaa11b66ca68a1b6 Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Mon, 25 Jun 2012 19:02:32 +0200
Subject: [PATCH] linux-user: fix segmentation fault passing with g2h(x) != x
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When forwarding a segmentation fault into the guest process, we were passing
the host's address directly into the guest process's signal descriptor.

That obviously confused the guest process, since it didn't know what to make
of the (usually 32-bit truncated) address. Passing in g2h(address) makes the
guest process a lot happier.

This fixes java running in arm-linux-user for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
[AF: Rebased onto AREG0 fix for v1.2, squashed fixup by agraf]
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 user-exec.c |    6 ++++++
 1 Datei geändert, 6 Zeilen hinzugefügt(+)

diff --git a/user-exec.c b/user-exec.c
index 1ec5d9a..71afbf1 100644
--- a/user-exec.c
+++ b/user-exec.c
@@ -98,6 +98,12 @@ static inline int handle_cpu_signal(uintptr_t pc, unsigned long address,
         return 1;
     }
 
+    if (RESERVED_VA) {
+        /* Convert forcefully to guest address space, invalid addresses
+           are still valid segv ones */
+        address = address - GUEST_BASE;
+    }
+
     /* see if it is an MMU fault */
     ret = cpu_handle_mmu_fault(cpu_single_env, address, is_write,
                                MMU_USER_IDX);

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File 0021-linux-user-fix-segmentation-fault-p.patch of Package qemu (Revision d9a3c1367781be08902d97cc95e329d6)

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