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Add doxygen style comments for functions in EBC module.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5194 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8
2008-05-13 08:46:12 +00:00
parent 335b890e40
commit 8e3bc754c5
8 changed files with 2211 additions and 477 deletions
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171
MdeModulePkg/Universal/EbcDxe/EbcInt.h
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@ -79,6 +79,23 @@ extern VM_CONTEXT *mVmPtr;
//
#define VM_STACK_KEY_VALUE 0xDEADBEEF
/**
Create thunks for an EBC image entry point, or an EBC protocol service.
@param ImageHandle Image handle for the EBC image. If not null, then
we're creating a thunk for an image entry point.
@param EbcEntryPoint Address of the EBC code that the thunk is to call
@param Thunk Returned thunk we create here
@param Flags Flags indicating options for creating the thunk
@retval EFI_SUCCESS The thunk was created successfully.
@retval EFI_INVALID_PARAMETER The parameter of EbcEntryPoint is not 16-bit
aligned.
@retval EFI_OUT_OF_RESOURCES There is not enough memory to created the EBC
Thunk.
@retval EFI_BUFFER_TOO_SMALL EBC_THUNK_SIZE is not larger enough.
**/
EFI_STATUS
EbcCreateThunks (
IN EFI_HANDLE ImageHandle,
@ -88,6 +105,19 @@ EbcCreateThunks (
)
;
/**
Add a thunk to our list of thunks for a given image handle.
Also flush the instruction cache since we've written thunk code
to memory that will be executed eventually.
@param ImageHandle The image handle to which the thunk is tied.
@param ThunkBuffer The buffer that has been created/allocated.
@param ThunkSize The size of the thunk memory allocated.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
EbcAddImageThunk (
IN EFI_HANDLE ImageHandle,
@ -100,6 +130,17 @@ EbcAddImageThunk (
// The interpreter calls these when an exception is detected,
// or as a periodic callback.
//
/**
The VM interpreter calls this function when an exception is detected.
@param ExceptionType Specifies the processor exception detected.
@param ExceptionFlags Specifies the exception context.
@param VmPtr Pointer to a VM context for passing info to the
EFI debugger.
@retval EFI_SUCCESS This function completed successfully.
**/
EFI_STATUS
EbcDebugSignalException (
IN EFI_EXCEPTION_TYPE ExceptionType,
@ -117,28 +158,56 @@ EbcDebugSignalException (
#define STACK_POOL_SIZE (1024 * 1020)
#define MAX_STACK_NUM 4
EFI_STATUS
EbcDebugSignalPeriodic (
IN VM_CONTEXT *VmPtr
)
;
//
// External low level functions that are native-processor dependent
//
//
/**
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.
@return The contents of the register in which the entry point is passed.
**/
UINTN
EFIAPI
EbcLLGetEbcEntryPoint (
VOID
)
;
/**
Returns the caller's value of the stack pointer.
We adjust it by 4 here because when they called us, the return address
is put on the stack, thereby lowering it by 4 bytes.
@return The current value of the stack pointer for the caller.
**/
UINTN
EFIAPI
EbcLLGetStackPointer (
VOID
)
;
/**
This function is called to execute an EBC CALLEX instruction.
This instruction requires that we thunk out to external native
code. For x64, we switch stacks, copy the arguments to the stack
and jump to the specified function.
On return, we restore the stack pointer to its original location.
Destroys no working registers.
@param CallAddr The function address.
@param EbcSp The new EBC stack pointer.
@param FramePtr The frame pointer.
**/
VOID
EFIAPI
EbcLLCALLEXNative (
IN UINTN CallAddr,
IN UINTN EbcSp,
@ -146,47 +215,114 @@ EbcLLCALLEXNative (
)
;
/**
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.
@param VmPtr Pointer to a VM context.
@param FuncAddr Callee's address
@param NewStackPointer New stack pointer after the call
@param FramePtr New frame pointer after the call
@param Size The size of call instruction
**/
VOID
EbcLLCALLEX (
IN VM_CONTEXT *VmPtr,
IN UINTN CallAddr,
IN UINTN EbcSp,
IN UINTN FuncAddr,
IN UINTN NewStackPointer,
IN VOID *FramePtr,
IN UINT8 Size
)
;
/**
When EBC calls native, on return the VM has to stuff the return
value into a VM register. It's assumed here that the value is still
in the register, so simply return and the caller should get the
return result properly.
@return The unmodified value returned by the native code.
**/
INT64
EFIAPI
EbcLLGetReturnValue (
VOID
)
;
/**
Returns the stack index and buffer assosicated with the Handle parameter.
@param Handle The EFI handle as the index to the EBC stack.
@param StackBuffer A pointer to hold the returned stack buffer.
@param BufferIndex A pointer to hold the returned stack index.
@retval EFI_OUT_OF_RESOURCES The Handle parameter does not correspond to any
existing EBC stack.
@retval EFI_SUCCESS The stack index and buffer were found and
returned to the caller.
**/
EFI_STATUS
GetEBCStack(
EFI_HANDLE Handle,
VOID **StackBuffer,
UINTN *BufferIndex
IN EFI_HANDLE Handle,
OUT VOID **StackBuffer,
OUT UINTN *BufferIndex
);
/**
Returns from the EBC stack by stack Index.
@param Index Specifies which EBC stack to return from.
@retval EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
ReturnEBCStack(
UINTN Index
IN UINTN Index
);
/**
Allocates memory to hold all the EBC stacks.
@retval EFI_SUCCESS The EBC stacks were allocated successfully.
@retval EFI_OUT_OF_RESOURCES Not enough memory available for EBC stacks.
**/
EFI_STATUS
InitEBCStack (
VOID
);
/**
Free all EBC stacks allocated before.
@retval EFI_SUCCESS All the EBC stacks were freed.
**/
EFI_STATUS
FreeEBCStack(
VOID
);
/**
Returns from the EBC stack associated with the Handle parameter.
@param Handle Specifies the EFI handle to find the EBC stack with.
@retval EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
ReturnEBCStackByHandle(
EFI_HANDLE Handle
IN EFI_HANDLE Handle
);
//
// Defines for a simple EBC debugger interface
@ -255,13 +391,6 @@ typedef struct {
#define EBC_PROTOCOL_PRIVATE_DATA_SIGNATURE EFI_SIGNATURE_32 ('e', 'b', 'c', 'p')
struct _EBC_PROTOCOL_PRIVATE_DATA {
UINT32 Signature;
EFI_EBC_PROTOCOL EbcProtocol;
UINTN StackBase;
UINTN StackTop;
UINTN StackSize;
} ;
#define EBC_PROTOCOL_PRIVATE_DATA_FROM_THIS(a) \
CR(a, EBC_PROTOCOL_PRIVATE_DATA, EbcProtocol, EBC_PROTOCOL_PRIVATE_DATA_SIGNATURE)