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OcMachoLib: Introduce MachoSymbolGetFileOffset64() API.

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Download-Fritz 2018-11-10 10:53:11 +01:00
parent 6b4d5120b6
commit 51c63ec135
2 changed files with 53 additions and 0 deletions
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15
Include/Library/OcMachoLib.h
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@ -359,6 +359,21 @@ MachoRelocateSymbol64 (
IN OUT MACH_NLIST_64 *Symbol
);
/**
Retrieves the Mach-O file offset of the address pointed to by Symbol.
@param[in] Context Context of the Mach-O.
@param[in] Symbol Symbol to retrieve the offset of.
@retval 0 0 is returned on failure.
**/
UINT32
MachoSymbolGetFileOffset64 (
IN OUT OC_MACHO_CONTEXT *Context,
IN OUT MACH_NLIST_64 *Symbol
);
/**
Returns whether Name is pure virtual.

38
Library/OcMachoLib/Symbols.c
View File

@ -476,3 +476,41 @@ MachoRelocateSymbol64 (
return TRUE;
}
/**
Retrieves the Mach-O file offset of the address pointed to by Symbol.
@param[in] Context Context of the Mach-O.
@param[in] Symbol Symbol to retrieve the offset of.
@retval 0 0 is returned on failure.
**/
UINT32
MachoSymbolGetFileOffset64 (
IN OUT OC_MACHO_CONTEXT *Context,
IN OUT MACH_NLIST_64 *Symbol
)
{
UINT64 Offset;
CONST MACH_SECTION_64 *Section;
ASSERT (Context != NULL);
ASSERT (Symbol != NULL);
Section = MachoGetSectionByIndex64 (Context, Symbol->Section);
if ((Section == NULL) || (Symbol->Value < Section->Address)) {
return 0;
}
Offset = (Symbol->Value - Section->Address);
if (Offset > Section->Size) {
return 0;
}
//
// The check against Section->Size guarantees a 32-bit value for the current
// library implementation.
//
return (Section->Offset + (UINT32)Offset);
}