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[Qemu-devel] [PATCH 0/2] Probe the guest memory space when using -R

From: Meador Inge
Subject: [Qemu-devel] [PATCH 0/2] Probe the guest memory space when using -R
Date: Tue, 10 Jul 2012 10:57:11 -0500


This patch series fixes an issue that was discussed here [1] where -R
can fail when the mapped address space fails validation.  I fixed this
issue by (1) refactoring the guest space probing code into a single
function for initialing the guest space and (2) by calling the guest space
initializing code for both the case of reserving the guest memory space
upfront (-R) and the case where the initial memory space base/size are gleaned
from an ELF image.

Tested by going through various combinations of -R <size>, -B <base>,
-B <base> -R <size>, and neither -R or -B passed.  I also ran the libstdc++
testsuite through the MIPS, ARM, and Power usermode emulators with -R set.
No regressions.

NOTE: This does not fix the problem that was raised concerning mapped the
full 32-bit address space on a 64-bit system.  That will need to be another

[1] http://lists.nongnu.org/archive/html/qemu-devel/2012-06/msg04508.html

Signed-off-by: Meador Inge <address@hidden>

Meador Inge (2):
  linux-user: Factor out guest space probing into a function
  linux-user: Use init_guest_space when -R and -B are specified

 linux-user/elfload.c |  162 ++++++++++++++++++++++++++++++++++++++------------
 linux-user/main.c    |   35 ++---------
 linux-user/qemu.h    |   13 +++-
 3 files changed, 139 insertions(+), 71 deletions(-)


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