Thanks Chip I shall do so. Here is what I would do please tell me if this will
work. Andrew really speaking I don't care what the assembly program does all I
need is that I transition from executing from a regular C code to pure assembly
and back. Please don't ask me why I want to do that ... :)
Thanks
Ananda
File 1:
Junk.c:
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
RunAsmCode();
}
File 2:
Bunk.asm
LEAF_ENTRY RunAsmCode, _TEXT$00
push rbx
push rax
push rcx
push rdx
mov ebx, ecx
mov ecx, 0ffffffffh
/* More code will come here */
pop rdx
pop rcx
pop rax
pop rbx
ret
LEAF_END RunAsmCode, _TEXT$00
end
From: Chip Ueltschey [mailto:[email protected]]
Sent: Wednesday, July 17, 2013 1:54 PM
To: Vardhana, Ananda
Cc: [email protected]
Subject: Re: [edk2] How to run assembly code in EFI
Inline assembly is not supported for 64-bit code.
You would need to put your assembly code in a separate file.
-chip
On Wed, Jul 17, 2013 at 1:29 PM, Vardhana, Ananda
<[email protected]<mailto:[email protected]>> wrote:
I am new to EFI and have a very simple question. I want to compile this
following short program. I am running on a 64 bit machine and the EDKII is also
64 bit. I have tried with _asm and __asm both failed. Might be I have to use ()
instead of {}? I don't know. Help pelase
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
_asm {
push ebx
push eax
push ecx
push edx
/* Other code follows*/
}
}
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