FPO_DATA structure
Applies to: desktop apps only
Represents the stack frame layout for a function on an x86 computer when frame pointer omission (FPO) optimization is used. The structure is used to locate the base of the call frame.
Syntax
typedef struct _FPO_DATA {
DWORD ulOffStart;
DWORD cbProcSize;
DWORD cdwLocals;
WORD cdwParams;
WORD cbProlog :8;
WORD cbRegs :3;
WORD fHasSEH :1;
WORD fUseBP :1;
WORD reserved :1;
WORD cbFrame :2;
} FPO_DATA, *PFPO_DATA;
Members
- ulOffStart
-
The offset of the first byte of the function code.
- cbProcSize
-
The number of bytes in the function.
- cdwLocals
-
The number of local variables.
- cdwParams
-
The size of the parameters, in DWORDs.
- cbProlog
-
The number of bytes in the function prolog code.
- cbRegs
-
The number of registers saved.
- fHasSEH
-
A variable that indicates whether the function uses structured exception handling.
- fUseBP
-
A variable that indicates whether the EBP register has been allocated.
- reserved
-
Reserved for future use.
- cbFrame
-
A variable that indicates the frame type.
Type Meaning - FRAME_FPO
- 0
FPO frame
- FRAME_NONFPO
- 3
Non-FPO frame
- FRAME_TRAP
- 1
Trap frame
- FRAME_TSS
- 2
TSS frame
Requirements
|
Redistributable | DbgHelp.dll 5.1 or later |
|---|---|
|
Header |
|
See also
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Build date: 3/6/2012
