[U-Boot] Support of latest qemux86-64

[Anton Gerasimov]

Some more details: EFI on QEMU v2.9.0 works as well, it's v2.10.0 where
some incompatibilities are introduced.

The last stable tag of u-boot that works (under qemu <= v2.9.0) as BIOS
for me is v2015.07. Starting from v2015.10 when I run

    qemu-system-x86_64 --bios u-boot.rom -nographic

I get the following dump:

Invalid Opcode (Undefined Opcode)
EIP: 0010:[<07f56583>] EFLAGS: 00000006
Original EIP :[<fff00583>]
EAX: 000000aa EBX: 07fab61c ECX: 0000006a EDX: 0000006b
ESI: 00000000 EDI: 00000003 EBP: 00000000 ESP: 07d52620
 DS: 0018 ES: 0018 FS: 0020 GS: 0018 SS: 0018
CR0: 00000033 CR2: 00000000 CR3: 00000000 CR4: 00000000
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Stack:
    0x07d52660 : 0x07f58460
    0x07d5265c : 0x07f77947
    0x07d52658 : 0x00000000
    0x07d52654 : 0x00000000
    0x07d52650 : 0x00000001
    0x07d5264c : 0x07fab61c
    0x07d52648 : 0x00000000
    0x07d52644 : 0x07fa319c
    0x07d52640 : 0x00000000
    0x07d5263c : 0x07f8ba2f
    0x07d52638 : 0x07d52780
    0x07d52634 : 0x07fab61c
    0x07d52630 : 0x07fcf200
    0x07d5262c : 0x07f77cb2
    0x07d52628 : 0x00000202
    0x07d52624 : 0x00000010
--->0x07d52620 : 0x07f77bdc
    0x07d5261c : 0x00000006
    0x07d52618 : 0x00000010
    0x07d52614 : 0x07f56583
### ERROR ### Please RESET the board ###

Debugging with gdb shows that it happens after transferring control to
RAM (board_f.c:1027 in v2015.10), but couldn't get more details so far,
so any help is appreciated.

Best regards,
Anton Gerasimov

On 11/03/2017 03:07 PM, Anton Gerasimov wrote:
> Hi all,
>
> I'm trying to use u-boot (v2017.01) with qemu-system-x86_64 v2.10.0 and
> run into a "trying to execute code outside of RAM or ROM at xxxxx"
> issue. It happens both when I build and use u-boot as a bios and as EFI
> payload, just the addresses in the error message are different. On qemu
> v2.5.0 at least EFI option works fine.
>
> I understand that it can be (and probably is) a QEMU issue, but maybe
> someone on the list already encountered it and knows a workaround or has
> successfully used u-boot with QEMU >=2.10.0 and can share their experience.
>
> Thanks in advance.
>
> Best regards,
> Anton Gerasimov
>
>

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