[Mono-dev] Crosscompiling Mono 5.0.0.100
Angelo Compagnucci
angelo.compagnucci at gmail.com
Tue May 23 16:07:07 UTC 2017
Hello Bernhard,
2017-05-23 17:21 GMT+02:00 Bernhard Urban <beurba at microsoft.com>:
> Hello Angelo,
>
> could you install gdb (or lldb) on your target? It looks like the target device doesn't support some instructions that mono generates (hence SIGILL). It would be useful to get a native stack trace, or a disassembly around the crash site.
I have gdb but I'm not having success with a backtrace, I'll try more!
> What CPU architecture/platform are you targeting?
Qemu versatile, so it's an ARM926EJ-S
> That might be helpful as well: http://www.mono-project.com/docs/debug+profile/debug/
I'm looking at it!
Thanks!
>
>
> -Bernhard
> ________________________________________
> From: Mono-devel-list <mono-devel-list-bounces at lists.dot.net> on behalf of Angelo Compagnucci <angelo.compagnucci at gmail.com>
> Sent: Tuesday, May 23, 2017 2:43:48 PM
> To: Mono-devel-list at lists.ximian.com
> Subject: [Mono-dev] Crosscompiling Mono 5.0.0.100
>
> Hello developers,
>
> I'm trying to crosscompile mono for qemu versatile with the buildroot
> crosscompiling system. More precisely, I'm trying to update the recipe
> bundled with buildroot for mono 4.8.1.100.
> I'm actually not a novice in this sort of thing, I actually
> contributed the recipe in the first place and contributed several
> patches to the mono build system to be cross compilable and musl
> compatible.
>
> Actually I have a working recipe, the same one i use for 4.8.1.100 and
> which works, and I can successfully compile mono 5.0.0.100.
>
> Unfortunately, compiling a simple hello world produces this error:
>
> # mcs hello.cs
> Stacktrace:
>
> at <unknown> <0xffffffff>
> at Mono.SafeStringMarshal.get_Value () [0x0001a] in
> <a1ccf43d50c94435a9f0fcab25017dca>:0
> at System.Environment.internalGetEnvironmentVariable (string)
> [0x0000c] in <a1ccf43d50c94435a9f0fcab25017dca>:0
> at System.Environment.GetEnvironmentVariable (string) [0x00000] in
> <a1ccf43d50c94435a9f0fcab25017dca>:0
> at Mono.CSharp.Driver.Main (string[]) [0x00000] in
> <65e20f41151e464c8d313246de15d1a3>:0
> at (wrapper runtime-invoke) <Module>.runtime_invoke_int_object
> (object,intptr,intptr,intptr) [0x00054] in
> <65e20f41151e464c8d313246de15d1a3>:0
> /proc/self/maps:
> 00008000-00299000 r-xp 00000000 08:00 3367 /usr/bin/mono-sgen
> 002a0000-002a2000 rwxp 00290000 08:00 3367 /usr/bin/mono-sgen
> 002a2000-0033b000 rwxp 00000000 00:00 0 [heap]
> b4c91000-b4f09000 r-xp 00000000 08:00 3263
> /usr/lib/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll
> b4f09000-b5000000 r-xp 00000000 08:00 2599
> /usr/lib/mono/gac/System.Core/4.0.0.0__b77a5c561934e089/System.Core.dll
> b5000000-b5021000 rwxp 00000000 00:00 0
> b5021000-b5100000 ---p 00000000 00:00 0
> b51a9000-b51aa000 ---p 00000000 00:00 0
> b51aa000-b52a9000 rwxp 00000000 00:00 0
> b52a9000-b5652000 r-xp 00000000 08:00 1491 /usr/lib/mono/4.5/mscorlib.dll
> b5652000-b5800000 r-xp 00000000 08:00 1270 /usr/lib/mono/4.5/mcs.exe
> b5800000-b6000000 rwxp 00000000 00:00 0
> b6000000-b6001000 ---p 00000000 00:00 0
> b6001000-b6c00000 rwxp 00000000 00:00 0
> b6c70000-b6cf0000 rwxp 00000000 00:00 0
> b6cf2000-b6d0b000 rwxp 00000000 00:00 0
> b6d0b000-b6d3a000 ---p 00000000 00:00 0
> b6d3a000-b6d4a000 rwxp 00000000 00:00 0
> b6d4a000-b6e7d000 r-xp 00000000 08:00 3567 /lib/libc-2.18.so
> b6e7d000-b6e84000 ---p 00133000 08:00 3567 /lib/libc-2.18.so
> b6e84000-b6e86000 r-xp 00132000 08:00 3567 /lib/libc-2.18.so
> b6e86000-b6e87000 rwxp 00134000 08:00 3567 /lib/libc-2.18.so
> b6e87000-b6e8a000 rwxp 00000000 00:00 0
> b6e8a000-b6eab000 r-xp 00000000 08:00 543 /lib/libgcc_s.so.1
> b6eab000-b6eb2000 ---p 00021000 08:00 543 /lib/libgcc_s.so.1
> b6eb2000-b6eb3000 rwxp 00020000 08:00 543 /lib/libgcc_s.so.1
> b6eb3000-b6ec9000 r-xp 00000000 08:00 991 /lib/libpthread-2.18.so
> b6ec9000-b6ed0000 ---p 00016000 08:00 991 /lib/libpthread-2.18.so
> b6ed0000-b6ed1000 r-xp 00015000 08:00 991 /lib/libpthread-2.18.so
> b6ed1000-b6ed2000 rwxp 00016000 08:00 991 /lib/libpthread-2.18.so
> b6ed2000-b6ed4000 rwxp 00000000 00:00 0
> b6ed4000-b6ed8000 r-xp 00000000 08:00 209 /lib/libdl-2.18.so
> b6ed8000-b6edf000 ---p 00004000 08:00 209 /lib/libdl-2.18.so
> b6edf000-b6ee0000 r-xp 00003000 08:00 209 /lib/libdl-2.18.so
> b6ee0000-b6ee1000 rwxp 00004000 08:00 209 /lib/libdl-2.18.so
> b6ee1000-b6ee7000 r-xp 00000000 08:00 1327 /lib/librt-2.18.so
> b6ee7000-b6eee000 ---p 00006000 08:00 1327 /lib/librt-2.18.so
> b6eee000-b6eef000 r-xp 00005000 08:00 1327 /lib/librt-2.18.so
> b6eef000-b6ef0000 rwxp 00006000 08:00 1327 /lib/librt-2.18.so
> b6ef0000-b6f8d000 r-xp 00000000 08:00 207 /lib/libm-2.18.so
> b6f8d000-b6f95000 ---p 0009d000 08:00 207 /lib/libm-2.18.so
> b6f95000-b6f96000 r-xp 0009d000 08:00 207 /lib/libm-2.18.so
> b6f96000-b6f97000 rwxp 0009e000 08:00 207 /lib/libm-2.18.so
> b6f97000-b6fb7000 r-xp 00000000 08:00 2447 /lib/ld-2.18.so
> b6fb7000-b6fb8000 rwxp 00000000 00:00 0
> b6fb8000-b6fb9000 rwxs 00000000 00:0c 225 /dev/shm/mono.110
> b6fb9000-b6fba000 ---p 00000000 00:00 0
> b6fba000-b6fbb000 r-xp 00000000 00:00 0
> b6fbb000-b6fbe000 rwxp 00000000 00:00 0
> b6fbe000-b6fbf000 r-xp 0001f000 08:00 2447 /lib/ld-2.18.so
> b6fbf000-b6fc0000 rwxp 00020000 08:00 2447 /lib/ld-2.18.so
> bec63000-bec84000 rw-p 00000000 00:00 0 [stack]
> bee69000-bee6a000 r-xp 00000000 00:00 0 [sigpage]
> ffff0000-ffff1000 r-xp 00000000 00:00 0 [vectors]
>
> Native stacktrace:
>
>
> Debug info from gdb:
>
> mono_gdb_render_native_backtraces not supported on this platform,
> unable to find gdb or lldb
>
> =================================================================
> Got a SIGILL while executing native code. This usually indicates
> a fatal error in the mono runtime or one of the native libraries
> used by your application.
> =================================================================
>
> Aborted
>
>
> I've not followed too closely the latests development bits for mono 5
> and I'm asking you some advice to understand what's going on.
>
> Thank your for your time!
>
> --
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