diff options
Diffstat (limited to 'MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c')
| -rw-r--r-- | MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c | 162 |
1 files changed, 66 insertions, 96 deletions
diff --git a/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c b/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c index a534e00780..1d008ac782 100644 --- a/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c +++ b/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c @@ -1,24 +1,17 @@ -/*++
-
-Copyright (c) 2006, Intel Corporation
-All rights reserved. This program and the accompanying materials
-are licensed and made available under the terms and conditions of the BSD License
-which accompanies this distribution. The full text of the license may be found at
-http://opensource.org/licenses/bsd-license.php
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-Module Name:
-
- EbcSupport.c
-
-Abstract:
-
+/** @file
This module contains EBC support routines that are customized based on
the target processor.
---*/
+Copyright (c) 2006, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
#include "EbcInt.h"
#include "EbcExecute.h"
@@ -33,38 +26,33 @@ Abstract: #define EBC_THUNK_SIZE 32
#define STACK_REMAIN_SIZE (1024 * 4)
-VOID
-EbcLLCALLEX (
- IN VM_CONTEXT *VmPtr,
- IN UINTN FuncAddr,
- IN UINTN NewStackPointer,
- IN VOID *FramePtr,
- IN UINT8 Size
- )
-/*++
-Routine Description:
- This function is called to execute an EBC CALLEX instruction.
+/**
+ This function is called to execute an EBC CALLEX instruction.
The function check the callee's content to see whether it is common native
code or a thunk to another piece of EBC code.
If the callee is common native code, use EbcLLCAllEXASM to manipulate,
otherwise, set the VM->IP to target EBC code directly to avoid another VM
be startup which cost time and stack space.
-
-Arguments:
- VmPtr - Pointer to a VM context.
- FuncAddr - Callee's address
- NewStackPointer - New stack pointer after the call
- FramePtr - New frame pointer after the call
- Size - The size of call instruction
+ @parm VmPtr Pointer to a VM context.
+ @parm FuncAddr Callee's address
+ @parm NewStackPointer New stack pointer after the call
+ @parm FramePtr New frame pointer after the call
+ @parm Size The size of call instruction
-Returns:
+ @return None.
- None.
-
---*/
+**/
+VOID
+EbcLLCALLEX (
+ IN VM_CONTEXT *VmPtr,
+ IN UINTN FuncAddr,
+ IN UINTN NewStackPointer,
+ IN VOID *FramePtr,
+ IN UINT8 Size
+ )
{
UINTN IsThunk;
UINTN TargetEbcAddr;
@@ -134,7 +122,7 @@ Action: // The callee is not a thunk to EBC, call native code.
//
EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);
-
+
//
// Get return value and advance the IP.
//
@@ -143,6 +131,19 @@ Action: }
}
+
+/**
+ Begin executing an EBC image. The address of the entry point is passed
+ in via a processor register, so we'll need to make a call to get the
+ value.
+
+ None. Since we're called from a fixed up thunk (which we want to keep
+ small), our only so-called argument is the EBC entry point passed in
+ to us in a processor register.
+
+ @return The value returned by the EBC application we're going to run.
+
+**/
STATIC
UINT64
EbcInterpret (
@@ -163,25 +164,6 @@ EbcInterpret ( IN OUT UINTN Arg15,
IN OUT UINTN Arg16
)
-/*++
-
-Routine Description:
-
- Begin executing an EBC image. The address of the entry point is passed
- in via a processor register, so we'll need to make a call to get the
- value.
-
-Arguments:
-
- None. Since we're called from a fixed up thunk (which we want to keep
- small), our only so-called argument is the EBC entry point passed in
- to us in a processor register.
-
-Returns:
-
- The value returned by the EBC application we're going to run.
-
---*/
{
//
// Create a new VM context on the stack
@@ -298,30 +280,24 @@ Returns: return (UINT64) VmContext.R[7];
}
-STATIC
-UINT64
-ExecuteEbcImageEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-/*++
-
-Routine Description:
+/**
Begin executing an EBC image. The address of the entry point is passed
in via a processor register, so we'll need to make a call to get the
value.
-
-Arguments:
- ImageHandle - image handle for the EBC application we're executing
- SystemTable - standard system table passed into an driver's entry point
+ @param ImageHandle image handle for the EBC application we're executing
+ @param SystemTable standard system table passed into an driver's entry point
-Returns:
+ @return The value returned by the EBC application we're going to run.
- The value returned by the EBC application we're going to run.
-
---*/
+**/
+STATIC
+UINT64
+ExecuteEbcImageEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
{
//
// Create a new VM context on the stack
@@ -373,7 +349,7 @@ Returns: VmContext.R[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);
VmContext.HighStackBottom = (UINTN)VmContext.R[0];
VmContext.R[0] -= sizeof (UINTN);
-
+
//
// Put a magic value in the stack gap, then adjust down again
//
@@ -390,7 +366,7 @@ Returns: VmContext.R[0] -= sizeof (UINTN);
*(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) ImageHandle;
- VmContext.R[0] -= 16;
+ VmContext.R[0] -= 16;
VmContext.StackRetAddr = (UINT64) VmContext.R[0];
//
// VM pushes 16-bytes for return address. Simulate that here.
@@ -407,6 +383,17 @@ Returns: return (UINT64) VmContext.R[7];
}
+
+/**
+ Create an IA32 thunk for the given EBC entry point.
+
+ @param ImageHandle Handle of image for which this thunk is being created
+ @param EbcEntryPoint Address of the EBC code that the thunk is to call
+ @param Thunk Returned thunk we create here
+
+ @return Standard EFI status.
+
+**/
EFI_STATUS
EbcCreateThunks (
IN EFI_HANDLE ImageHandle,
@@ -414,23 +401,6 @@ EbcCreateThunks ( OUT VOID **Thunk,
IN UINT32 Flags
)
-/*++
-
-Routine Description:
-
- Create an IA32 thunk for the given EBC entry point.
-
-Arguments:
-
- ImageHandle - Handle of image for which this thunk is being created
- EbcEntryPoint - Address of the EBC code that the thunk is to call
- Thunk - Returned thunk we create here
-
-Returns:
-
- Standard EFI status.
-
---*/
{
UINT8 *Ptr;
UINT8 *ThunkBase;
|