Add non-objcopy IA32 crt0/lds
* Needed by embedded (MacOS) ELF toolchain Signed-off-by: Callum Farmer <gmbr3@opensuse.org>
This commit is contained in:
Callum Farmer
parent
644e03821e
commit
e092a94869
@ -80,7 +80,7 @@ endif
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# on aarch64, avoid jump tables before all relocations have been processed
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reloc_aarch64.o: CFLAGS += -fno-jump-tables
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ifneq (,$(filter $(ARCH),aarch64 riscv64))
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ifneq (,$(filter $(ARCH),aarch64 riscv64 ia32))
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CRT0_LOCAL_TARGET = crt0-efi-$(ARCH)-local.o
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endif
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@ -116,7 +116,7 @@ ifneq (,$(findstring FreeBSD,$(OS)))
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ifeq ($(ARCH),x86_64)
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$(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_fbsd_efi.lds $(INSTALLROOT)$(LIBDIR)
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else
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ifneq (,$(filter $(ARCH),aarch64 riscv64))
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ifneq (,$(filter $(ARCH),aarch64 riscv64 ia32))
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$(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_efi_local.lds $(INSTALLROOT)$(LIBDIR)
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endif
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$(INSTALL) -m 644 $(SRCDIR)/elf_$(ARCH)_efi.lds $(INSTALLROOT)$(LIBDIR)
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176
gnuefi/crt0-efi-ia32-local.S
Normal file
176
gnuefi/crt0-efi-ia32-local.S
Normal file
@ -0,0 +1,176 @@
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.section .text.head
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/*
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* Magic "MZ" signature for PE/COFF
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*/
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.globl ImageBase
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ImageBase:
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.ascii "MZ"
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.skip 58 // 'MZ' + pad + offset == 64
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.4byte pe_header - ImageBase // Offset to the PE header.
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pe_header:
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.ascii "PE"
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.2byte 0
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coff_header:
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.2byte 0x14c // i386+
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.2byte 4 // nr_sections
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.4byte 0 // TimeDateStamp
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.4byte 0 // PointerToSymbolTable
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.4byte 0 // NumberOfSymbols
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.2byte section_table - optional_header // SizeOfOptionalHeader
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.2byte 0x306 // Characteristics.
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// IMAGE_FILE_32BIT_MACHINE |
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// IMAGE_FILE_DEBUG_STRIPPED |
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// IMAGE_FILE_EXECUTABLE_IMAGE |
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// IMAGE_FILE_LINE_NUMS_STRIPPED
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optional_header:
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.2byte 0x10b // PE32+ format
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.byte 0x02 // MajorLinkerVersion
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.byte 0x14 // MinorLinkerVersion
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.4byte _etext - _start // SizeOfCode
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.4byte _alldata_size - ImageBase // SizeOfInitializedData
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.4byte 0 // SizeOfUninitializedData
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.4byte _start - ImageBase // AddressOfEntryPoint
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.4byte _start - ImageBase // BaseOfCode
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.4byte _reloc - ImageBase // BaseOfData
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extra_header_fields:
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.4byte 0 // ImageBase
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.4byte 0x1000 // SectionAlignment
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.4byte 0x1000 // FileAlignment
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.2byte 0 // MajorOperatingSystemVersion
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.2byte 0 // MinorOperatingSystemVersion
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.2byte 0 // MajorImageVersion
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.2byte 0 // MinorImageVersion
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.2byte 0 // MajorSubsystemVersion
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.2byte 0 // MinorSubsystemVersion
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.4byte 0 // Win32VersionValue
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.4byte _image_end - ImageBase // SizeOfImage
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// Everything before the kernel image is considered part of the header
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.4byte _start - ImageBase // SizeOfHeaders
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.4byte 0 // CheckSum
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.2byte EFI_SUBSYSTEM // Subsystem
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.2byte 0 // DllCharacteristics
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.4byte 0 // SizeOfStackReserve
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.4byte 0 // SizeOfStackCommit
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.4byte 0 // SizeOfHeapReserve
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.4byte 0 // SizeOfHeapCommit
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.4byte 0 // LoaderFlags
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.4byte 0x10 // NumberOfRvaAndSizes
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.8byte 0 // ExportTable
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.8byte 0 // ImportTable
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.8byte 0 // ResourceTable
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.8byte 0 // ExceptionTable
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.8byte 0 // CertificationTable
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.4byte _reloc - ImageBase // BaseRelocationTable (VirtualAddress)
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.4byte _reloc_vsize - ImageBase // BaseRelocationTable (Size)
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.8byte 0 // Debug
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.8byte 0 // Architecture
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.8byte 0 // Global Ptr
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.8byte 0 // TLS Table
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.8byte 0 // Load Config Table
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.8byte 0 // Bound Import
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.8byte 0 // IAT
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.8byte 0 // Delay Import Descriptor
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.8byte 0 // CLR Runtime Header
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.8byte 0 // Reserved, must be zero
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// Section table
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section_table:
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.ascii ".text\0\0\0"
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.4byte _evtext - _start // VirtualSize
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.4byte _start - ImageBase // VirtualAddress
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.4byte _etext - _start // SizeOfRawData
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.4byte _start - ImageBase // PointerToRawData
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.4byte 0 // PointerToRelocations (0 for executables)
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.4byte 0 // PointerToLineNumbers (0 for executables)
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.2byte 0 // NumberOfRelocations (0 for executables)
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.2byte 0 // NumberOfLineNumbers (0 for executables)
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.4byte 0x60000020 // Characteristics (section flags)
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/*
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* The EFI application loader requires a relocation section
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* because EFI applications must be relocatable. This is a
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* dummy section as far as we are concerned.
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*/
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.ascii ".reloc\0\0"
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.4byte _reloc_vsize - ImageBase // VirtualSize
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.4byte _reloc - ImageBase // VirtualAddress
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.4byte _reloc_size - ImageBase // SizeOfRawData
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.4byte _reloc - ImageBase // PointerToRawData
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.4byte 0 // PointerToRelocations
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.4byte 0 // PointerToLineNumbers
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.2byte 0 // NumberOfRelocations
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.2byte 0 // NumberOfLineNumbers
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.4byte 0x42000040 // Characteristics (section flags)
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.ascii ".data\0\0\0"
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.4byte _data_vsize - ImageBase // VirtualSize
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.4byte _data - ImageBase // VirtualAddress
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.4byte _data_size - ImageBase // SizeOfRawData
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.4byte _data - ImageBase // PointerToRawData
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.4byte 0 // PointerToRelocations
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.4byte 0 // PointerToLineNumbers
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.2byte 0 // NumberOfRelocations
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.2byte 0 // NumberOfLineNumbers
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.4byte 0xC0000040 // Characteristics (section flags)
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.ascii ".rodata\0"
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.4byte _rodata_vsize - ImageBase // VirtualSize
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.4byte _rodata - ImageBase // VirtualAddress
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.4byte _rodata_size - ImageBase // SizeOfRawData
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.4byte _rodata - ImageBase // PointerToRawData
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.4byte 0 // PointerToRelocations
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.4byte 0 // PointerToLineNumbers
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.2byte 0 // NumberOfRelocations
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.2byte 0 // NumberOfLineNumbers
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.4byte 0x40000040 // Characteristics (section flags)
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.globl _start
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.type _start,%function
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_start:
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pushl %ebp
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movl %esp,%ebp
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pushl 12(%ebp) # copy "image" argument
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pushl 8(%ebp) # copy "systab" argument
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call 0f
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0: popl %eax
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movl %eax,%ebx
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addl $ImageBase-0b,%eax # %eax = ldbase
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addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC
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pushl %ebx # pass _DYNAMIC as second argument
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pushl %eax # pass ldbase as first argument
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call _relocate
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popl %ebx
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popl %ebx
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testl %eax,%eax
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jne .exit
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call _entry # call app with "image" and "systab" argument
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.exit: leave
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ret
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// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
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.data
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dummy: .4byte 0
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#define IMAGE_REL_ABSOLUTE 0
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.section .reloc
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.4byte dummy // Page RVA
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.4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
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.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
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.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
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#if defined(__ELF__) && defined(__linux__)
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.section .note.GNU-stack,"",%progbits
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#endif
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141
gnuefi/elf_ia32_efi_local.lds
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141
gnuefi/elf_ia32_efi_local.lds
Normal file
@ -0,0 +1,141 @@
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OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
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OUTPUT_ARCH(i386)
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ENTRY(_start)
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SECTIONS
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{
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.text 0 : {
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*(.text.head)
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. = ALIGN(4096);
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_text = .;
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*(.text)
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*(.text.*)
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*(.gnu.linkonce.t.*)
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*(.plt)
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. = ALIGN(16);
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_evtext = .;
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. = ALIGN(4096);
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_etext = .;
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} =0
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_text_vsize = _evtext - _text;
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_text_size = _etext - _text;
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. = ALIGN(4096);
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_reloc = .;
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.reloc : {
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*(.reloc)
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_evreloc = .;
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. = ALIGN(4096);
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_ereloc = .;
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} =0
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_reloc_vsize = _evreloc - _reloc;
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_reloc_size = _ereloc - _reloc;
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. = ALIGN(4096);
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_data = .;
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_DYNAMIC = .;
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.dynamic : { *(.dynamic) }
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. = ALIGN(4096);
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.data :
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{
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*(.sdata)
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*(.data)
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*(.data1)
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*(.data.*)
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*(.got.plt)
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*(.got)
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/*
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* Note that these aren't the using the GNU "CONSTRUCTOR" output section
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* command, so they don't start with a size. Because of p2align and the
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* end/END definitions, and the fact that they're mergeable, they can also
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* have NULLs which aren't guaranteed to be at the end.
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*/
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. = ALIGN(16);
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__init_array_start = .;
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*(SORT(.init_array.*))
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*(.init_array)
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__init_array_end = .;
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. = ALIGN(16);
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__CTOR_LIST__ = .;
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*(SORT(.ctors.*))
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*(.ctors)
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__CTOR_END__ = .;
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. = ALIGN(16);
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__DTOR_LIST__ = .;
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*(SORT(.dtors.*))
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*(.dtors)
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__DTOR_END__ = .;
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. = ALIGN(16);
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__fini_array_start = .;
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*(SORT(.fini_array.*))
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*(.fini_array)
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__fini_array_end = .;
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/* the EFI loader doesn't seem to like a .bss section, so we stick
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it all into .data: */
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. = ALIGN(16);
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_bss = .;
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*(.sbss)
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*(.scommon)
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(COMMON)
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. = ALIGN(16);
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_bss_end = .;
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_evdata = .;
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. = ALIGN(4096);
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_edata = .;
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} =0
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_data_vsize = _evdata - _data;
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_data_size = _edata - _data;
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. = ALIGN(4096);
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_rodata = .;
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.rela :
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{
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*(.rela.text*)
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*(.rela.data*)
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*(.rela.got)
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*(.rela.dyn)
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*(.rela.stab)
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*(.rela.init_array*)
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*(.rela.fini_array*)
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*(.rela.ctors*)
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*(.rela.dtors*)
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}
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. = ALIGN(4096);
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.rela.plt : { *(.rela.plt) }
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. = ALIGN(4096);
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.rodata : {
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*(.rodata*)
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_evrodata = .;
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. = ALIGN(4096);
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_erodata = .;
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} =0
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_rodata_vsize = _evrodata - _rodata;
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_rodata_size = _erodata - _rodata;
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_image_end = .;
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_alldata_size = _image_end - _reloc;
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. = ALIGN(4096);
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.dynsym : { *(.dynsym) }
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. = ALIGN(4096);
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.dynstr : { *(.dynstr) }
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. = ALIGN(4096);
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.note.gnu.build-id : { *(.note.gnu.build-id) }
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. = ALIGN(4096);
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.hash : { *(.hash) }
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. = ALIGN(4096);
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.gnu.hash : { *(.gnu.hash) }
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. = ALIGN(4096);
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.eh_frame : { *(.eh_frame) }
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.eh_frame_hdr : { *(.eh_frame_hdr) }
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. = ALIGN(4096);
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.gcc_except_table : { *(.gcc_except_table*) }
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/DISCARD/ :
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{
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*(.rela.reloc)
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*(.note.GNU-stack)
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}
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.comment 0 : { *(.comment) }
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}
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