Hello,
I hope this is the correct mailing list for my request. If not sorry.
I use OVMF-X64-r15214 with qemu version 1.1.2 (Debian
1.1.2+dfsg-6a+deb7u2). It works great for my first tests.
I now want to use the DEBUG() call to have some debug traces.
My program is very simple. I use gnu-efi to build it.
#include <efi.h>
#include <efilib.h>
EFI_STATUS
EFIAPI
efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
{
InitializeLib(ImageHandle, SystemTable);
Print(L"a\n");
DEBUG(( D_INFO, (CHAR8 *)"D_INFO\r\n"));
Print(L"b\n");
DEBUG(( D_ERROR, (CHAR8 *)"D_ERROR\r\n"));
Print(L"c\n");
return EFI_SUCCESS;
}
I start qemu using:
qemu-system-x86_64 -bios OVMF-X64-r15214/OVMF.fd \
-boot c -m 128 -hda 'disk.img' \
-serial file:serial.log
In the qemu graphical window I see 2 lines:
a
b
In the serial.log file I have:
[...]
Shell> fs0:
FS0:\> usb1
a
b
D_ERROR
The first call to DEBUG() with D_INFO is not displayed. I guess it is
because of the lines in /usr/include/efi/efidebug.h
//
// Current Debug level of the system, value of EFIDebug
//
//#define EFI_DBUG_MASK (D_ERROR | D_WARN | D_LOAD | D_BLKIO | D_INIT)
#define EFI_DBUG_MASK (D_ERROR)
The problem is that right after the "D_ERROR" is logged I get a crash
of the virtual machine with:
qemu: fatal: Trying to execute code outside RAM or ROM at 0x00000000000b0000
RAX=0000000000000000 RBX=0000000080000000 RCX=0000000000000000
RDX=0000000000000018
RSI=0000000000000005 RDI=0000000007dd0c30 RBP=0000000007f94560
RSP=0000000007f94518
R8 =0000000000000000 R9 =0000000007f93f5c R10=00000000000003f8
R11=0000000000000040
R12=0000000000000005 R13=0000000000000000 R14=0000000000000000
R15=0000000000000000
RIP=00000000000affae RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0008 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
CS =0028 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
SS =0008 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
DS =0008 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
FS =0008 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
GS =0008 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
GDT= 0000000007f1ed98 0000003f
IDT= 000000000747f018 00000fff
CR0=80000033 CR2=0000000000000000 CR3=0000000007f33000 CR4=00000668
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=0000000000000000 CCD=0000000000000000 CCO=ADDB
EFER=0000000000000500
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000
XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000
XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000
XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000
XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000
XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000
XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000
XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000
I also tried to start qemu using "-debugcon file:debug.log -global
isa-debugcon.iobase=0x402" as indicated in [1] but I get the same
crash and not log or debug at all.
Is it a bug in OVMF-X64-r15214 or in qemu version 1.1.2?
Do I need to initialize something before I can call DEBUG()?
Thanks
[1] https://github.com/tianocore/edk2-OvmfPkg
--
Dr. Ludovic Rousseau
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