** Description changed:
+ SRU justification:
+
+ Impact: The 64bit XEN kernel does not honour the MAP_32BIT flag. This
+ reason for this is a change that removed the
+ arch_get_unmapped_area_topdown() function from the code (probably to
+ resolve a defined twice error)
+
+ Fix: attached patch to restore the architecture specific function and to
+ define ARCH_HAVE_UNMAPPED_AREA_TOPDOWN
+
+ Testcase: running mono applications on 64bit XEN kernels.
+
+
Binary package hint: linux-image-2.6.24-18-xen
Description: Ubuntu 8.04
Release: 8.04
linux-image-2.6.24-18-xen:
Installed: 2.6.24-18.32
Mono applications exit with the following error:
TYPE: 1
**
** ERROR:(mini-amd64.c:192):amd64_patch: assertion failed: (amd64_is_imm32
(disp))
Further investigation indicates that linux-image-2.6.24-18-xen does not obey
to the MAP_32BIT flag. Here a relevant portion of the strace of a failing mono
app (f-spot):
mmap(NULL, 2113464, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1f62f000
mmap(NULL, 2132968, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1f426000
mmap(NULL, 2881032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1f166000
mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1ef62000
mmap(NULL, 2208624, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1ed46000
mmap(NULL, 2621672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1eac5000
mmap(NULL, 3543672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1e763000
mmap(NULL, 2209176, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1e547000
mmap(NULL, 2249472, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1e321000
mmap(NULL, 65536, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS|0x40, -1, 0) = 0x7f0c1f903000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
mmap(NULL, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7f0c1f8cf000
mmap(NULL, 2131184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1df1e000
mmap(NULL, 2198224, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1dd05000
mmap(NULL, 2139352, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1dafa000
mmap(NULL, 2143528, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1d8ee000
mmap(NULL, 65536, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS|0x40, -1, 0) = 0x7f0c1f8af000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
mmap(NULL, 2151816, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f0c1d110000
--
linux-image-2.6.24-18-xen breaks mono
https://bugs.launchpad.net/bugs/237724
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