Liu Jaloo <liu.ja...@gmail.com> writes:
> in qemu branch statble-9.2
>
> $ ./build/qemu-system-arm -M microbit -device
> loader,file=/path/to/heart-hearts-makecode.hex
>
> Segmentation fault
Is it really a hex file?
The code in question is generic_loader_realize() and it falls back
through a series of steps:
if (s->file) {
AddressSpace *as = s->cpu ? s->cpu->as : NULL;
if (!s->force_raw) {
size = load_elf_as(s->file, NULL, NULL, NULL, &entry, NULL, NULL,
NULL, big_endian, 0, 0, 0, as);
if (size < 0) {
size = load_uimage_as(s->file, &entry, NULL, NULL, NULL, NULL,
as);
}
if (size < 0) {
size = load_targphys_hex_as(s->file, &entry, as);
}
}
>
>
> about the error, gdb backtrace like this:
>
> bash-5.1$ gdb ./build/qemu-system-arm
> GNU gdb (GDB) 11.2
> Copyright (C) 2022 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> Type "show copying" and "show warranty" for details.
> This GDB was configured as "x86_64-slackware-linux".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <https://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
> <http://www.gnu.org/software/gdb/documentation/>.
>
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from ./build/qemu-system-arm...
> warning: File "/home/jaloo/slackware/qemu/qemu/.gdbinit" auto-loading has
> been declined by your `auto-load safe-path'
> set to "$debugdir:$datadir/auto-load".
> To enable execution of this file add
> add-auto-load-safe-path /home/jaloo/slackware/qemu/qemu/.gdbinit
> line to your configuration file "/home/jaloo/.config/gdb/gdbinit".
> To completely disable this security protection add
> set auto-load safe-path /
> line to your configuration file "/home/jaloo/.config/gdb/gdbinit".
> For more information about this security protection see the
> --Type <RET> for more, q to quit, c to continue without paging--
> "Auto-loading safe path" section in the GDB manual. E.g., run from the
> shell:
> info "(gdb)Auto-loading safe path"
> (gdb) r -M microbit -device loader,file=../microbit/heart-hearts-makecode.hex
> Starting program: /home/jaloo/slackware/qemu/qemu/build/qemu-system-arm -M
> microbit -device
> loader,file=../microbit/heart-hearts-makecode.hex
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> [New Thread 0x7ffff228d640 (LWP 2380)]
> [New Thread 0x7ffff190a640 (LWP 2382)]
>
> Thread 1 "qemu-system-arm" received signal SIGSEGV, Segmentation fault.
> 0x00007ffff60e53d1 in __memmove_avx_unaligned_erms () from /lib64/libc.so.6
> (gdb) bt
> #0 0x00007ffff60e53d1 in __memmove_avx_unaligned_erms () at /lib64/libc.so.6
> #1 0x0000555556037ed9 in address_space_write_rom_internal
> (as=0x555557afe160, addr=0, attrs=..., ptr=0x555557de8290, len=1313804,
> type=WRITE_DATA) at .
> ./system/physmem.c:3040
> #2 0x0000555556037fa7 in address_space_write_rom
> (as=0x555557afe160, addr=0, attrs=..., buf=0x555557de8290, len=1313804)
> at ../system/physmem.c:3060
> #3 0x0000555555977704 in rom_reset (unused=0x0) at ../hw/core/loader.c:1252
> #4 0x0000555555986644 in legacy_reset_hold
> (obj=0x5555576c12c0, type=RESET_TYPE_COLD) at ../hw/core/reset.c:76
> #5 0x00005555560a3938 in resettable_phase_hold
> (obj=0x5555576c12c0, opaque=0x0, type=RESET_TYPE_COLD)
> at ../hw/core/resettable.c:162
> #6 0x00005555560a2049 in resettable_container_child_foreach
> (obj=0x555557a2a9f0, cb=0x5555560a3820 <resettable_phase_hold>,
> opaque=0x0, type=RESET_TYPE_COLD) at .
> ./hw/core/resetcontainer.c:54
> #7 0x00005555560a3687 in resettable_child_foreach
> (rc=0x5555578ced10, obj=0x555557a2a9f0, cb=0x5555560a3820
> <resettable_phase_hold>, opaque=0x0,
> type=RESET_TYPE_COLD) at ../hw/core/resettable.c:92
> #8 0x00005555560a38dd in resettable_phase_hold
> (obj=0x555557a2a9f0, opaque=0x0, type=RESET_TYPE_COLD)
> at ../hw/core/resettable.c:155
> #9 0x00005555560a353c in resettable_assert_reset
> --Type <RET> for more, q to quit, c to continue without paging--
> (obj=0x555557a2a9f0, type=RESET_TYPE_COLD) at ../hw/core/resettable.c:58
> #10 0x00005555560a3494 in resettable_reset
> (obj=0x555557a2a9f0, type=RESET_TYPE_COLD) at ../hw/core/resettable.c:45
> #11 0x000055555598696e in qemu_devices_reset (type=RESET_TYPE_COLD)
> at ../hw/core/reset.c:176
> #12 0x0000555555cf5826 in qemu_system_reset (reason=SHUTDOWN_CAUSE_NONE)
> at ../system/runstate.c:527
> #13 0x000055555597fb9d in qdev_machine_creation_done ()
> at ../hw/core/machine.c:1689
> #14 0x0000555555cfd197 in qemu_machine_creation_done
> (errp=0x5555575be0e0 <error_fatal>) at ../system/vl.c:2690
> #15 0x0000555555cfd30f in qmp_x_exit_preconfig
> (errp=0x5555575be0e0 <error_fatal>) at ../system/vl.c:2720
> #16 0x0000555555cffce8 in qemu_init (argc=5, argv=0x7fffffffdd08)
> at ../system/vl.c:3753
> #17 0x00005555562479f0 in main (argc=5, argv=0x7fffffffdd08)
> at ../system/main.c:47
>
> according to docs/system/arm/nrf.rst
>
> $ qemu-system-arm -M microbit -device loader,file=test.hex
>
> from the page https://microbit.org/projects/make-it-code-it/heart/ download
> the hex file :
>
> wget https://microbit.org/downloads/heart-hearts-makecode.hex
Hmm it looks like its crashing after it loaded. But did it get to
load_targphys_hex_as?
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
