diff options
| author | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-11-22 08:07:30 +0000 |
|---|---|---|
| committer | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-11-22 08:07:30 +0000 |
| commit | 7102b199613eaef6d28e89f72783e35f15cf6b8c (patch) | |
| tree | 4dda5678e5dcd7a65df00d9a51bb2d1b2272b915 /MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm | |
| parent | db40504eaeaf1f005755305cf8c48fcfd281360b (diff) | |
| download | edk2-platforms-7102b199613eaef6d28e89f72783e35f15cf6b8c.tar.xz | |
Remove assumption on EAX and R10 usage for IA32 compiler and X64 compiler.
Signed-off-by: jyao1
Reviewed-by: lgao4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12760 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm')
| -rw-r--r-- | MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm | 155 |
1 files changed, 139 insertions, 16 deletions
diff --git a/MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm b/MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm index 19fc35b0fc..a79fdcabff 100644 --- a/MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm +++ b/MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm @@ -24,6 +24,8 @@ .CODE
CopyMem PROTO Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
+EbcInterpret PROTO
+ExecuteEbcImageEntryPoint PROTO
;****************************************************************************
; EbcLLCALLEX
@@ -71,25 +73,146 @@ EbcLLCALLEXNative PROC PUBLIC ret
EbcLLCALLEXNative ENDP
-
-; UINTN EbcLLGetEbcEntryPoint(VOID);
-; Routine Description:
-; The VM thunk code stuffs an EBC entry point into a processor
-; register. Since we can't use inline assembly to get it from
-; the interpreter C code, stuff it into the return value
-; register and return.
-;
-; Arguments:
-; None.
+;****************************************************************************
+; EbcLLEbcInterpret
;
-; Returns:
-; The contents of the register in which the entry point is passed.
+; Begin executing an EBC image.
+;****************************************************************************
+; UINT64 EbcLLEbcInterpret(VOID)
+EbcLLEbcInterpret PROC PUBLIC
+ ;
+ ;; mov rax, ca112ebccall2ebch
+ ;; mov r10, EbcEntryPoint
+ ;; mov r11, EbcLLEbcInterpret
+ ;; jmp r11
+ ;
+ ; Caller uses above instruction to jump here
+ ; The stack is below:
+ ; +-----------+
+ ; | RetAddr |
+ ; +-----------+
+ ; |EntryPoint | (R10)
+ ; +-----------+
+ ; | Arg1 | <- RDI
+ ; +-----------+
+ ; | Arg2 |
+ ; +-----------+
+ ; | ... |
+ ; +-----------+
+ ; | Arg16 |
+ ; +-----------+
+ ; | Dummy |
+ ; +-----------+
+ ; | RDI |
+ ; +-----------+
+ ; | RSI |
+ ; +-----------+
+ ; | RBP | <- RBP
+ ; +-----------+
+ ; | RetAddr | <- RSP is here
+ ; +-----------+
+ ; | Scratch1 | (RCX) <- RSI
+ ; +-----------+
+ ; | Scratch2 | (RDX)
+ ; +-----------+
+ ; | Scratch3 | (R8)
+ ; +-----------+
+ ; | Scratch4 | (R9)
+ ; +-----------+
+ ; | Arg5 |
+ ; +-----------+
+ ; | Arg6 |
+ ; +-----------+
+ ; | ... |
+ ; +-----------+
+ ; | Arg16 |
+ ; +-----------+
+ ;
+
+ ; save old parameter to stack
+ mov [rsp + 08h], rcx
+ mov [rsp + 10h], rdx
+ mov [rsp + 18h], r8
+ mov [rsp + 20h], r9
+
+ ; Construct new stack
+ push rbp
+ mov rbp, rsp
+ push rsi
+ push rdi
+ push rbx
+ sub rsp, 80h
+ push r10
+ mov rsi, rbp
+ add rsi, 10h
+ mov rdi, rsp
+ add rdi, 8
+ mov rcx, 16
+ rep movsq
+
+ ; build new paramater calling convention
+ mov r9, [rsp + 18h]
+ mov r8, [rsp + 10h]
+ mov rdx, [rsp + 08h]
+ mov rcx, r10
+
+ ; call C-code
+ call EbcInterpret
+ add rsp, 88h
+ pop rbx
+ pop rdi
+ pop rsi
+ pop rbp
+ ret
+EbcLLEbcInterpret ENDP
+
+;****************************************************************************
+; EbcLLExecuteEbcImageEntryPoint
;
-EbcLLGetEbcEntryPoint PROC PUBLIC
- ; The EbcEntryPoint is saved to R10.
- mov rax, r10
+; Begin executing an EBC image.
+;****************************************************************************
+; UINT64 EbcLLExecuteEbcImageEntryPoint(VOID)
+EbcLLExecuteEbcImageEntryPoint PROC PUBLIC
+ ;
+ ;; mov rax, ca112ebccall2ebch
+ ;; mov r10, EbcEntryPoint
+ ;; mov r11, EbcLLExecuteEbcImageEntryPoint
+ ;; jmp r11
+ ;
+ ; Caller uses above instruction to jump here
+ ; The stack is below:
+ ; +-----------+
+ ; | RetAddr |
+ ; +-----------+
+ ; |EntryPoint | (R10)
+ ; +-----------+
+ ; |ImageHandle|
+ ; +-----------+
+ ; |SystemTable|
+ ; +-----------+
+ ; | Dummy |
+ ; +-----------+
+ ; | Dummy |
+ ; +-----------+
+ ; | RetAddr | <- RSP is here
+ ; +-----------+
+ ; |ImageHandle| (RCX)
+ ; +-----------+
+ ; |SystemTable| (RDX)
+ ; +-----------+
+ ;
+
+ ; build new paramater calling convention
+ mov r8, rdx
+ mov rdx, rcx
+ mov rcx, r10
+
+ ; call C-code
+ sub rsp, 28h
+ call ExecuteEbcImageEntryPoint
+ add rsp, 28h
ret
-EbcLLGetEbcEntryPoint ENDP
+EbcLLExecuteEbcImageEntryPoint ENDP
END
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