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154 lines
4 KiB
C
154 lines
4 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/elf32.c
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* PURPOSE: No purpose listed.
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*
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* PROGRAMMERS: No programmer listed.
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*/
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#include <ntoskrnl.h>
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#define __ELF_WORD_SIZE 32
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#include "elf.inc.h"
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extern NTSTATUS NTAPI Elf64FmtCreateSection
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(
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IN CONST VOID * FileHeader,
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IN SIZE_T FileHeaderSize,
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IN PVOID File,
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OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
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OUT PULONG Flags,
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IN PEXEFMT_CB_READ_FILE ReadFileCb,
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IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
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);
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NTSTATUS NTAPI ElfFmtCreateSection
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(
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IN CONST VOID * FileHeader,
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IN SIZE_T FileHeaderSize,
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IN PVOID File,
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OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
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OUT PULONG Flags,
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IN PEXEFMT_CB_READ_FILE ReadFileCb,
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IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
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)
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{
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ULONG nDataType;
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const Elf32_Ehdr * pehTempHeader;
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ASSERT(FileHeader);
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ASSERT(FileHeaderSize > 0);
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ASSERT(Intsafe_CanOffsetPointer(FileHeader, FileHeaderSize));
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ASSERT(File);
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ASSERT(ImageSectionObject);
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ASSERT(Flags);
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ASSERT(ReadFileCb);
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ASSERT(AllocateSegmentsCb);
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pehTempHeader = FileHeader;
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ASSERT(((ULONG_PTR)pehTempHeader % TYPE_ALIGNMENT(Elf32_Ehdr)) == 0);
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ASSERT(((ULONG_PTR)pehTempHeader % TYPE_ALIGNMENT(Elf64_Ehdr)) == 0);
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ASSERT(ELFFMT_FIELDS_EQUAL(Elf32_Ehdr, Elf64_Ehdr, e_ident));
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/* File too small to be identified */
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if(!RTL_CONTAINS_FIELD(pehTempHeader, FileHeaderSize, e_ident[EI_MAG3]))
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return STATUS_ROS_EXEFMT_UNKNOWN_FORMAT;
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/* Not an ELF file */
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if
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(
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pehTempHeader->e_ident[EI_MAG0] != ELFMAG0 ||
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pehTempHeader->e_ident[EI_MAG1] != ELFMAG1 ||
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pehTempHeader->e_ident[EI_MAG2] != ELFMAG2 ||
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pehTempHeader->e_ident[EI_MAG3] != ELFMAG3
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)
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return STATUS_ROS_EXEFMT_UNKNOWN_FORMAT;
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/* Validate the data type */
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nDataType = pehTempHeader->e_ident[EI_DATA];
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switch(nDataType)
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{
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case ELFDATA2LSB:
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case ELFDATA2MSB:
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break;
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default:
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return STATUS_INVALID_IMAGE_FORMAT;
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}
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/* Validate the version */
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ASSERT(ELFFMT_FIELDS_EQUAL(Elf32_Ehdr, Elf64_Ehdr, e_version));
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if
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(
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pehTempHeader->e_ident[EI_VERSION] != EV_CURRENT ||
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ElfFmtpReadULong(pehTempHeader->e_version, nDataType) != EV_CURRENT
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)
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return STATUS_INVALID_IMAGE_FORMAT;
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/* Validate the file type */
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ASSERT(ELFFMT_FIELDS_EQUAL(Elf32_Ehdr, Elf64_Ehdr, e_type));
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switch(ElfFmtpReadUShort(pehTempHeader->e_type, nDataType))
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{
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case ET_DYN: ImageSectionObject->ImageCharacteristics |= IMAGE_FILE_DLL;
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case ET_EXEC: break;
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default: return STATUS_INVALID_IMAGE_FORMAT;
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}
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/* Convert the target machine */
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ASSERT(ELFFMT_FIELDS_EQUAL(Elf32_Ehdr, Elf64_Ehdr, e_machine));
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ASSERT(ImageSectionObject->Machine == IMAGE_FILE_MACHINE_UNKNOWN);
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switch(ElfFmtpReadUShort(pehTempHeader->e_machine, nDataType))
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{
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case EM_386: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_I386; break;
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case EM_MIPS_RS3_LE: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_R3000; break;
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#if 0
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/* TODO: need to read e_flags for full identification */
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case EM_SH: break;
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#endif
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case EM_ARM: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_ARM; break;
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case EM_PPC: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_POWERPC; break;
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case EM_IA_64: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_IA64; break;
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case EM_ALPHA: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_AXP64; break;
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case EM_X86_64: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_AMD64; break;
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case EM_M32R: ImageSectionObject->Machine = IMAGE_FILE_MACHINE_M32R; break;
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}
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/* Call the appropriate handler for the class-specific fields */
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switch(pehTempHeader->e_ident[EI_CLASS])
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{
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case ELFCLASS32:
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return Elf32FmtCreateSection
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(
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FileHeader,
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FileHeaderSize,
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File,
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ImageSectionObject,
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Flags,
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ReadFileCb,
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AllocateSegmentsCb
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);
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case ELFCLASS64:
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return Elf64FmtCreateSection
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(
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FileHeader,
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FileHeaderSize,
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File,
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ImageSectionObject,
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Flags,
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ReadFileCb,
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AllocateSegmentsCb
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);
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}
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/* Unknown class */
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return STATUS_INVALID_IMAGE_FORMAT;
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}
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/* EOF */
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