File 0051-linux-user-Fix-stale-tbs-after-mmap.patch of Package qemu

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File 0051-linux-user-Fix-stale-tbs-after-mmap.patch of Package qemu (Revision f24ca223b18baedb7a161d50d0b0e6c5)

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From 84512269f8abeb117eb424122eaea4f9a9ccdd07 Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Mon, 7 May 2012 11:23:02 +0200
Subject: [PATCH] linux-user: Fix stale tbs after mmap

If we execute linux-user code that does the following:

* A = mmap()
  * execute code in A
  * munmap(A)
  * B = mmap(), but mmap returns the same address as A
  * execute code in B

we end up executing a stale cached tb that contains translated code
from A, while we want new code from B.

This patch adds a TB flush for mmap'ed regions, before we return them,
avoiding the whole issue.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 linux-user/mmap.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 2620f88..390e940 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -587,6 +587,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
     page_dump(stdout);
     printf("\n");
 #endif
+    tb_invalidate_phys_page_range(start, start + len, 0);
     mmap_unlock();
     return start;
 fail:
@@ -768,6 +769,7 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
         page_set_flags(old_addr, old_addr + old_size, 0);
         page_set_flags(new_addr, new_addr + new_size, prot | PAGE_VALID);
     }
+    tb_invalidate_phys_page_range(new_addr, new_addr + new_size, 0);
     mmap_unlock();
     return new_addr;
 }

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File 0051-linux-user-Fix-stale-tbs-after-mmap.patch of Package qemu (Revision f24ca223b18baedb7a161d50d0b0e6c5)

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