[Mono-dev] Mono runtime on ARM920t with many assertions
Dennis Krzyzaniak
dkml at conworx.com
Fri Jun 1 10:29:53 UTC 2012
Hi all,
I am trying to get Mono running on a spider III device including an ARM920t
processor with Linux as OS.
/host $ uname -a
Linux Spider-III 2.6.17.3-axo-s07.2 #1425 Fri Jul 25 10:59:30 CEST 2008
armv4tl unknown
When I try to invoke a simple hello_world.exe I get 399 assertions in eglib
(always the same asserts):
/host $ ./mono hello_world.exe
../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed
../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed
../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed
../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed
.
The 'Hello World' is also displayed:
../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed
../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed
Hello World../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL'
failed
.
The hello world code:
using System;
namespace foobar {
public class foo {
public static void Main(string[] args) {
Console.WriteLine("Hello World");
}
}
}
I am absolutely new to Mono and completely lost with this behavior. Maybe
someone knows the reason or can point me to a direction to find the issue?
I attached a trace (./mono -trace hello_world.exe), maybe this helps? The
trace is cut to fit into this mail, please let me know if a full trace is
needed.
I am using the debian source package of Mono 2_10_8.1-1 because in the
official release a unittest fails.
To get Mono build with the 'old' ARM toolchain provided by the vendor I
made a few changes in the project please see below.
I am calling configure with the following parameters:
configure --build=i686-pc-linux-gnu --host=arm-axotec-linux-gnu
LD=arm-axotec-linux-gnu-ld OBJDUMP=arm-axotec-linux-gnu-objdump
--prefix=/host --disable-mcs-build --srcdir=../..
configure.in:
+
+dnl
+dnl BEGIN Conworx Spider III ARMv4t settings
+dnl there are already arm-*-linux* settings below but the place is to late,
checks which
+dnl tested before fails. So I added my specific stuff here without changing
the old
+dnl settings.
+dnl
+if test "x$host" = "xarm-axotec-linux-gnu"; then
+dnl looks like this are all needed settings, the rest is redundant.
+ TARGET=ARM;
+ cross_compiling=yes
+ dnl which defines are needed? just copied some
+ dnl CPPFLAGS="$CPPFLAGS -DGC_LINUX_THREADS -D_GNU_SOURCE -D_REENTRANT
-DARM_FPU_NONE -D__ARM_EABI__"
+ CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_REENTRANT -DARM_FPU_NONE
-mcpu=arm920t -D__ARM_ARCH_4__"
+ CPPFLAGS="$CPPFLAGS -DNO_THUMB2_INSTRUCTIONS"
+ arch_target=arm;
+ ACCESS_UNALIGNED="no"
+ JIT_SUPPORTED=yes
+ jit_wanted=true
+ sgen_supported=true
+ dnl Can't use tls, since it depends on the runtime detection of tls
offsets
+ dnl in mono-compiler.h
+ libgc_threads=pthreads
+ with_tls=pthread
+ use_sigposix=yes
+ dnl Enable support for using sigaltstack for SIGSEGV and
+ dnl stack overflow handling (TODO not sure if it works on my arm)
+ with_sigaltstack=no
+ dnl to bypass the underscore linker check, can't work when
cross-compiling
+ mono_cv_uscore=yes
+ dnl support ahead of time compilation
+ AOT_SUPPORTED="yes"
+ libdl="-ldl"
+ dnl I need some define to enable my hacks oO
+ AC_DEFINE(PLATFORM_AXOTEC_LINUX,1,[Targeting axotec linux on arm920t])
+fi
+
+# Added LT_OUTPUT to generate libtool script by config.lt before calling
it.
+LT_OUTPUT
export_ldflags=`(./libtool --config; echo eval echo
\\$export_dynamic_flag_spec) | sh`
AC_SUBST(export_ldflags)
+dnl the check for cross compiling is included in the mono release but
removed
+dnl in the debian source package because for the debian distribution no
cross
+dnl compiling is used.
+if test ${TARGET} = ARM && test x$cross_compiling = xno; then
dnl ******************************************
dnl *** Check to see what FPU is available ***
dnl ******************************************
mono/metadata/sgen-archdep.h:
/* We dont store ip, sp */
#define ARCH_NUM_REGS 14
+/* arm920t does not support thumb2 instructions */
+#if !defined (NO_THUMB2_INSTRUCTIONS)
+/* THUMB2 instuctions */
#define ARCH_STORE_REGS(ptr) \
__asm__ __volatile__( \
"push {lr}\n" \
@@ -145,6 +148,17 @@
: \
: "r" (ptr) \
)
+#else /* NO_THUMB2_INSTRUCTIONS */
+/* ARM instuctions */
+#define ARCH_STORE_REGS(ptr) \
+ __asm__ __volatile__( \
+ "stmfd sp!, {lr}\n" \
+ "mov lr, %0\n" \
+ "stmia lr!, {r0-r12}\n" \
+ "ldmfd sp!, {lr}\n" \
+ : \
+ : "r" (ptr))
+#endif /* NO_THUMB2_INSTRUCTIONS */
mono/mini/jit-icalls.c:
#if defined(__arm__) && MONO_ARCH_SOFT_FLOAT
+#if defined (PLATFORM_AXOTEC_LINUX)
+ /* ULLONG_MAX is not defined, just define here the max size of an
unsigend
+ * long long int. */
+#ifndef ULLONG_MAX
+#define ULLONG_MAX 18446744073709551615ULL
+#endif /* !ULLONG_MAX */
+#endif /* PLATFORM_AXOTEC_LINUX */
if (isnan (v) || !(v >= -0.5 && v <= ULLONG_MAX+0.5)) {
mono_raise_exception (mono_get_exception_overflow ());
Would be great to get some help!
Best regards,
Dennis Krzyzaniak
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