762 lines
19 KiB
C
762 lines
19 KiB
C
/** @file
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Provides Mach-O parsing helper functions.
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Copyright (c) 2016 - 2018, Download-Fritz. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef OC_MACHO_LIB_H_
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#define OC_MACHO_LIB_H_
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#include <IndustryStandard/AppleMachoImage.h>
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///
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/// Default assumed page size.
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///
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#define MACHO_PAGE_SIZE 4096U
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///
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/// Macro to align by default assumed page size.
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///
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#define MACHO_ALIGN(x) ALIGN_VALUE((x), MACHO_PAGE_SIZE)
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///
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/// Context used to refer to a Mach-O. This struct is exposed for reference
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/// only. Members are not guaranteed to be sane.
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///
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typedef struct {
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MACH_HEADER_64 *MachHeader;
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UINT32 FileSize;
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MACH_SYMTAB_COMMAND *Symtab;
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MACH_NLIST_64 *SymbolTable;
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CHAR8 *StringTable;
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MACH_DYSYMTAB_COMMAND *DySymtab;
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MACH_NLIST_64 *IndirectSymbolTable;
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MACH_RELOCATION_INFO *LocalRelocations;
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MACH_RELOCATION_INFO *ExternRelocations;
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} OC_MACHO_CONTEXT;
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/**
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Initializes a Mach-O Context.
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@param[out] Context Mach-O Context to initialize.
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@param[in] FileData Pointer to the file's data.
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@param[in] FileSize File size of FileData.
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@return Whether Context has been initialized successfully.
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**/
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BOOLEAN
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MachoInitializeContext (
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OUT OC_MACHO_CONTEXT *Context,
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IN VOID *FileData,
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IN UINT32 FileSize
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);
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/**
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Returns the Mach-O Header structure.
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@param[in,out] Context Context of the Mach-O.
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**/
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MACH_HEADER_64 *
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MachoGetMachHeader64 (
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IN OUT OC_MACHO_CONTEXT *Context
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);
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/**
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Returns the Mach-O's file size.
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@param[in,out] Context Context of the Mach-O.
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**/
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UINT32
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MachoGetFileSize (
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IN OUT OC_MACHO_CONTEXT *Context
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);
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/**
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Returns the Mach-O's virtual address space size.
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@param[out] Context Context of the Mach-O.
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**/
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UINT32
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MachoGetVmSize64 (
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IN OUT OC_MACHO_CONTEXT *Context
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);
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/**
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Returns the last virtual address of a Mach-O.
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@param[in] Context Context of the Mach-O.
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@retval 0 The binary is malformed.
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**/
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UINT64
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MachoGetLastAddress64 (
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IN OUT OC_MACHO_CONTEXT *Context
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);
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/**
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Retrieves the first UUID Load Command.
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@param[in,out] Context Context of the Mach-O.
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@retval NULL NULL is returned on failure.
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**/
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MACH_UUID_COMMAND *
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MachoGetUuid64 (
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IN OUT OC_MACHO_CONTEXT *Context
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);
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/**
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Retrieves the first segment by the name of SegmentName.
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@param[in,out] Context Context of the Mach-O.
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@param[in] SegmentName Segment name to search for.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SEGMENT_COMMAND_64 *
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MachoGetSegmentByName64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *SegmentName
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);
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/**
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Retrieves the first section by the name of SectionName.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Segment Segment to search in.
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@param[in] SectionName Section name to search for.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SECTION_64 *
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MachoGetSectionByName64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN MACH_SEGMENT_COMMAND_64 *Segment,
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IN CONST CHAR8 *SectionName
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);
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/**
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Retrieves a section within a segment by the name of SegmentName.
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@param[in,out] Context Context of the Mach-O.
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@param[in] SegmentName The name of the segment to search in.
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@param[in] SectionName The name of the section to search for.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SECTION_64 *
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MachoGetSegmentSectionByName64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *SegmentName,
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IN CONST CHAR8 *SectionName
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);
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/**
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Retrieves the next segment.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Segment Segment to retrieve the successor of.
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if NULL, the first segment is returned.
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@retal NULL NULL is returned on failure.
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**/
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MACH_SEGMENT_COMMAND_64 *
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MachoGetNextSegment64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_SEGMENT_COMMAND_64 *Segment OPTIONAL
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);
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/**
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Retrieves the next section of a segment.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Segment The segment to get the section of.
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@param[in] Section The section to get the successor of.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SECTION_64 *
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MachoGetNextSection64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN MACH_SEGMENT_COMMAND_64 *Segment,
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IN MACH_SECTION_64 *Section OPTIONAL
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);
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/**
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Retrieves a section by its index.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Index Index of the section to retrieve.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SECTION_64 *
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MachoGetSectionByIndex64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT32 Index
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);
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/**
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Retrieves a section by its address.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Address Address of the section to retrieve.
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@retval NULL NULL is returned on failure.
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**/
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MACH_SECTION_64 *
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MachoGetSectionByAddress64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT64 Address
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);
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/**
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Returns whether Symbol describes a section.
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@param[in] Symbol Symbol to evaluate.
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**/
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BOOLEAN
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MachoSymbolIsSection (
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Returns whether Symbol is defined.
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@param[in] Symbol Symbol to evaluate.
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**/
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BOOLEAN
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MachoSymbolIsDefined (
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Returns whether Symbol is defined locally.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Symbol Symbol to evaluate.
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**/
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BOOLEAN
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MachoSymbolIsLocalDefined (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Retrieves a locally defined symbol by its name.
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@param[in] Context Context of the Mach-O.
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@param[in] Name Name of the symbol to locate.
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**/
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MACH_NLIST_64 *
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MachoGetLocalDefinedSymbolByName (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *Name
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);
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/**
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Retrieves a symbol by its index.
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@param[in] Context Context of the Mach-O.
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@param[in] Index Index of the symbol to locate.
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@retval NULL NULL is returned on failure.
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**/
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MACH_NLIST_64 *
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MachoGetSymbolByIndex64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT32 Index
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);
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/**
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Retrieves Symbol's name.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Symbol Symbol to retrieve the name of.
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@retval symbol name.
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**/
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CONST CHAR8 *
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MachoGetSymbolName64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Retrieves Symbol's name.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Symbol Indirect symbol to retrieve the name of.
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@retval NULL NULL is returned on failure.
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**/
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CONST CHAR8 *
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MachoGetIndirectSymbolName64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Returns whether the symbol's value is a valid address within the Mach-O
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referenced to by Context.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Symbol Symbol to verify the value of.
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**/
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BOOLEAN
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MachoIsSymbolValueInRange64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_NLIST_64 *Symbol
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);
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/**
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Retrieves the symbol referenced by the Relocation targeting Address.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Address Address to search for.
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@param[out] Symbol Buffer to output the symbol referenced by the
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Relocation into. The output is undefined when FALSE
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is returned. May be NULL.
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@returns Whether the Relocation exists.
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**/
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BOOLEAN
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MachoGetSymbolByRelocationOffset64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT64 Address,
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OUT MACH_NLIST_64 **Symbol
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);
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/**
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Retrieves the symbol referenced by the extern Relocation targeting Address.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Address Address to search for.
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@param[out] Symbol Buffer to output the symbol referenced by the
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Relocation into. The output is undefined when FALSE
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is returned. May be NULL.
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@returns Whether the Relocation exists.
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**/
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BOOLEAN
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MachoGetSymbolByExternRelocationOffset64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT64 Address,
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OUT MACH_NLIST_64 **Symbol
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);
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/**
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Relocate Symbol to be against LinkAddress.
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@param[in,out] Context Context of the Mach-O.
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@param[in] LinkAddress The address to be linked against.
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@param[in,out] Symbol The symbol to be relocated.
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@returns Whether the operation has been completed successfully.
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**/
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BOOLEAN
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MachoRelocateSymbol64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN UINT64 LinkAddress,
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IN OUT MACH_NLIST_64 *Symbol
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);
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/**
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Retrieves the Mach-O file offset of the address pointed to by Symbol.
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@param[in,out] Context Context of the Mach-O.
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@param[in] Symbol Symbol to retrieve the offset of.
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@param[out] FileOffset Pointer the file offset is returned into.
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If FALSE is returned, the output is undefined.
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@param[out] MaxSize Maximum data safely available from FileOffset.
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@retval 0 0 is returned on failure.
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**/
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BOOLEAN
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MachoSymbolGetFileOffset64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST MACH_NLIST_64 *Symbol,
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OUT UINT32 *FileOffset,
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OUT UINT32 *MaxSize OPTIONAL
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);
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/**
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Returns whether Name is pure virtual.
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@param[in] Name The name to evaluate.
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**/
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BOOLEAN
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MachoSymbolNameIsPureVirtual (
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IN CONST CHAR8 *Name
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);
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/**
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Returns whether Name is a Padslot.
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@param[in] Name The name to evaluate.
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**/
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BOOLEAN
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MachoSymbolNameIsPadslot (
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IN CONST CHAR8 *Name
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);
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/**
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Returns whether SymbolName defines a Super Metaclass Pointer.
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@param[in,out] Context Context of the Mach-O.
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@param[in] SymbolName The symbol name to check.
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**/
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BOOLEAN
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MachoSymbolNameIsSmcp64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *SymbolName
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);
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/**
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Returns whether SymbolName defines a Super Metaclass Pointer.
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@param[in,out] Context Context of the Mach-O.
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@param[in] SymbolName The symbol name to check.
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**/
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BOOLEAN
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MachoSymbolNameIsMetaclassPointer64 (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *SymbolName
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);
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/**
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Retrieves the class name of a Super Meta Class Pointer.
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@param[in,out] Context Context of the Mach-O.
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@param[in] SmcpName SMCP Symbol name to get the class name of.
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@param[in] ClassNameSize The size of ClassName.
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@param[out] ClassName The output buffer for the class name.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetClassNameFromSuperMetaClassPointer (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *SmcpName,
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IN UINTN ClassNameSize,
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OUT CHAR8 *ClassName
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);
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/**
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Retrieves the class name of a VTable.
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@param[out] VtableName The VTable's name.
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**/
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CONST CHAR8 *
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MachoGetClassNameFromVtableName (
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IN CONST CHAR8 *VtableName
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);
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/**
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Retrieves the function prefix of a class name.
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@param[in] ClassName The class name to evaluate.
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@param[in] FunctionPrefixSize The size of FunctionPrefix.
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@param[out] FunctionPrefix The output buffer for the function prefix.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetFunctionPrefixFromClassName (
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IN CONST CHAR8 *ClassName,
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IN UINTN FunctionPrefixSize,
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OUT CHAR8 *FunctionPrefix
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);
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/**
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Retrieves the class name of a Meta Class Pointer.
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@param[in,out] Context Context of the Mach-O.
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@param[in] MetaClassName MCP Symbol name to get the class name of.
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@param[in] ClassNameSize The size of ClassName.
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@param[out] ClassName The output buffer for the class name.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetClassNameFromMetaClassPointer (
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IN OUT OC_MACHO_CONTEXT *Context,
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IN CONST CHAR8 *MetaClassName,
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IN UINTN ClassNameSize,
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OUT CHAR8 *ClassName
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);
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/**
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Retrieves the VTable name of a class name.
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@param[in] ClassName Class name to get the VTable name of.
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@param[in] VtableNameSize The size of VtableName.
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@param[out] VtableName The output buffer for the VTable name.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetVtableNameFromClassName (
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IN CONST CHAR8 *ClassName,
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IN UINTN VtableNameSize,
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OUT CHAR8 *VtableName
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);
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/**
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Retrieves the Meta VTable name of a class name.
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@param[in] ClassName Class name to get the Meta VTable name of.
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@param[in] VtableNameSize The size of VtableName.
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@param[out] VtableName The output buffer for the VTable name.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetMetaVtableNameFromClassName (
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IN CONST CHAR8 *ClassName,
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IN UINTN VtableNameSize,
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OUT CHAR8 *VtableName
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);
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/**
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Retrieves the final symbol name of a class name.
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@param[in] ClassName Class name to get the final symbol name of.
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@param[in] FinalSymbolNameSize The size of FinalSymbolName.
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@param[out] FinalSymbolName The output buffer for the final symbol name.
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@returns Whether the name has been retrieved successfully.
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**/
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BOOLEAN
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MachoGetFinalSymbolNameFromClassName (
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IN CONST CHAR8 *ClassName,
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IN UINTN FinalSymbolNameSize,
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OUT CHAR8 *FinalSymbolName
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);
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/**
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Returns whether SymbolName defines a VTable.
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@param[in] SymbolName The symbol name to check.
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**/
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BOOLEAN
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MachoSymbolNameIsVtable64 (
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IN CONST CHAR8 *SymbolName
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);
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/**
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Returns whether the symbol name describes a C++ symbol.
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@param[in] Name The name to evaluate.
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**/
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BOOLEAN
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MachoSymbolNameIsCxx (
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IN CONST CHAR8 *Name
|
|
);
|
|
|
|
/**
|
|
Retrieves Metaclass symbol of a SMCP.
|
|
|
|
@param[in,out] Context Context of the Mach-O.
|
|
@param[in] Smcp The SMCP to evaluate.
|
|
|
|
@retval NULL NULL is returned on failure.
|
|
|
|
**/
|
|
MACH_NLIST_64 *
|
|
MachoGetMetaclassSymbolFromSmcpSymbol64 (
|
|
IN OUT OC_MACHO_CONTEXT *Context,
|
|
IN CONST MACH_NLIST_64 *Smcp
|
|
);
|
|
|
|
/**
|
|
Retrieves VTable and Meta VTable of a SMCP.
|
|
Logically matches XNU's get_vtable_syms_from_smcp.
|
|
|
|
@param[in,out] Context Context of the Mach-O.
|
|
@param[in] SmcpName SMCP Symbol mame to retrieve the VTables from.
|
|
@param[out] Vtable Output buffer for the VTable symbol pointer.
|
|
@param[out] MetaVtable Output buffer for the Meta VTable symbol pointer.
|
|
|
|
**/
|
|
BOOLEAN
|
|
MachoGetVtableSymbolsFromSmcp64 (
|
|
IN OUT OC_MACHO_CONTEXT *Context,
|
|
IN CONST CHAR8 *SmcpName,
|
|
OUT CONST MACH_NLIST_64 **Vtable,
|
|
OUT CONST MACH_NLIST_64 **MetaVtable
|
|
);
|
|
|
|
/**
|
|
Returns whether the Relocation's type indicates a Pair for the Intel 64
|
|
platform.
|
|
|
|
@param[in] Type The Relocation's type to verify.
|
|
|
|
**/
|
|
BOOLEAN
|
|
MachoRelocationIsPairIntel64 (
|
|
IN UINT8 Type
|
|
);
|
|
|
|
/**
|
|
Returns whether the Relocation's type matches a Pair's for the Intel 64
|
|
platform.
|
|
|
|
@param[in] Type The Relocation's type to verify.
|
|
|
|
**/
|
|
BOOLEAN
|
|
MachoIsRelocationPairTypeIntel64 (
|
|
IN UINT8 Type
|
|
);
|
|
|
|
/**
|
|
Returns whether the Relocation shall be preserved for the Intel 64 platform.
|
|
|
|
@param[in] Type The Relocation's type to verify.
|
|
|
|
**/
|
|
BOOLEAN
|
|
MachoPreserveRelocationIntel64 (
|
|
IN UINT8 Type
|
|
);
|
|
|
|
/**
|
|
Obtain symbol tables.
|
|
|
|
@param[in] Context Context of the Mach-O.
|
|
@param[out] SymbolTable Symbol table.
|
|
@param[out] StringTable String table for that symbol table.
|
|
@param[out] LocalSymbols Local symbol table.
|
|
@param[out] NumLocalSymbols Number of symbols in local symbol table.
|
|
@param[out] ExternalSymbols External symbol table.
|
|
@param[out] NumExternalSymbols Number of symbols in external symbol table.
|
|
@param[out] UndefinedSymbols Undefined symbol table.
|
|
@param[out] NumUndefinedSymbols Number of symbols in undefined symbol table.
|
|
|
|
@return number of symbols in symbol table or 0.
|
|
**/
|
|
UINT32
|
|
MachoGetSymbolTable (
|
|
IN OUT OC_MACHO_CONTEXT *Context,
|
|
OUT CONST MACH_NLIST_64 **SymbolTable,
|
|
OUT CONST CHAR8 **StringTable OPTIONAL,
|
|
OUT CONST MACH_NLIST_64 **LocalSymbols OPTIONAL,
|
|
OUT UINT32 *NumLocalSymbols OPTIONAL,
|
|
OUT CONST MACH_NLIST_64 **ExternalSymbols OPTIONAL,
|
|
OUT UINT32 *NumExternalSymbols OPTIONAL,
|
|
OUT CONST MACH_NLIST_64 **UndefinedSymbols OPTIONAL,
|
|
OUT UINT32 *NumUndefinedSymbols OPTIONAL
|
|
);
|
|
|
|
/**
|
|
Obtain indirect symbol table.
|
|
|
|
@param[in] Context Context of the Mach-O.
|
|
@param[in,out] SymbolTable Indirect symbol table.
|
|
|
|
@return number of symbols in indirect symbol table or 0.
|
|
**/
|
|
UINT32
|
|
MachoGetIndirectSymbolTable (
|
|
IN OUT OC_MACHO_CONTEXT *Context,
|
|
OUT CONST MACH_NLIST_64 **SymbolTable
|
|
);
|
|
|
|
/**
|
|
Returns a pointer to the Mach-O file at the specified virtual address.
|
|
|
|
@param[in,out] Context Context of the Mach-O.
|
|
@param[in] Address Virtual address to look up.
|
|
@param[out] MaxSize Maximum data safely available from FileOffset.
|
|
If NULL is returned, the output is undefined.
|
|
|
|
**/
|
|
VOID *
|
|
MachoGetFilePointerByAddress64 (
|
|
IN OUT OC_MACHO_CONTEXT *Context,
|
|
IN UINT64 Address,
|
|
OUT UINT32 *MaxSize OPTIONAL
|
|
);
|
|
|
|
/**
|
|
Expand Mach-O image to Destination (make segment file sizes equal to vm sizes).
|
|
|
|
@param[in] Context Context of the Mach-O.
|
|
@param[out] Destination Output buffer.
|
|
@param[in] DestinationSize Output buffer maximum size.
|
|
@param[in] Strip Output with stripped prelink commands.
|
|
|
|
@returns New image size or 0 on failure.
|
|
|
|
**/
|
|
UINT32
|
|
MachoExpandImage64 (
|
|
IN OC_MACHO_CONTEXT *Context,
|
|
OUT UINT8 *Destination,
|
|
IN UINT32 DestinationSize,
|
|
IN BOOLEAN Strip
|
|
);
|
|
|
|
/**
|
|
Find Mach-O entry point from LC_UNIXTHREAD loader command.
|
|
This command does not verify Mach-O and assumes it is valid.
|
|
|
|
@param[in] Image Loaded Mach-O image.
|
|
|
|
@returns Entry point or 0.
|
|
**/
|
|
UINTN
|
|
MachoRuntimeGetEntryAddress (
|
|
IN VOID *Image
|
|
);
|
|
|
|
#endif // OC_MACHO_LIB_H_
|