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https://github.com/ipxe/ipxe
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[efi] Use elf2efi utility in place of efilink
elf2efi converts a suitable ELF executable (containing relocation information, and with appropriate virtual addresses) into an EFI executable. It is less tightly coupled with the gPXE build process and, in particular, does not require the use of a hand-crafted PE image header in efiprefix.S. elf2efi correctly handles .bss sections, which significantly reduces the size of the gPXE EFI executable.
This commit is contained in:
Michael Brown
@@ -1,175 +0,0 @@
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.text
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.code32
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.arch i386
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.section ".prefix", "a", @progbits
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.org 0x00
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/* DOS (.com) header
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*
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* EFI executables seem to leave most of this empty
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*/
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mzhdr:
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.ascii "MZ" /* Magic number */
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.word 0 /* Bytes on last page of file */
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.word 0 /* Pages in file */
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.word 0 /* Relocations */
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.word 0 /* Size of header in paragraphs */
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.word 0 /* Minimum extra paragraphs needed */
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.word 0 /* Maximum extra paragraphs needed */
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.word 0 /* Initial (relative) SS value */
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.word 0 /* Initial SP value */
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.word 0 /* "Checksum" */
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.word 0 /* Initial IP value */
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.word 0 /* Initial (relative) CS value */
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.word 0 /* File address of relocation table */
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.word 0 /* Ovesrlay number */
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.word 0, 0, 0, 0 /* Reserved words */
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.word 0 /* OEM identifier (for e_oeminfo) */
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.word 0 /* OEM information; e_oemid specific */
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.word 0, 0, 0, 0, 0 /* Reserved words */
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.word 0, 0, 0, 0, 0 /* Reserved words */
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.long pehdr_lma /* File address of new exe header */
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.size mzhdr, . - mzhdr
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/* PE header */
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.org 0xc0 /* For compatibility with MS toolchain */
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pehdr:
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.ascii "PE\0\0" /* Magic number */
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.word 0x014c /* CPU architecture: i386 */
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.word num_pe_sections /* Number of sections */
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.long 0x10d1a884 /* Timestamp */
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.long 0 /* Symbol table */
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.long 0 /* Number of symbols */
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.word opthdr_size /* Size of optional header */
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.word 0x2102 /* Characteristics */
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.size pehdr, . - pehdr
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.equ pehdr_lma, pehdr - mzhdr
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/* "Optional" header */
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opthdr:
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.word 0x010b /* Magic number */
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.byte 0 /* Linker major version number */
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.byte 0 /* Linker minor version number */
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.long _text_filesz /* Size of text section */
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.long _data_filesz /* Size of data section */
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.long _bss_filesz /* Size of bss section */
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.long efi_entry_lma /* Entry point */
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.long _text_lma /* Text section start RVA */
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.long _data_lma /* Data section start RVA */
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.long 0 /* Image base address */
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.long _max_align /* Section alignment */
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.long _max_align /* File alignment */
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.word 0 /* Operating system major version number */
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.word 0 /* Operating system minor version number */
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.word 0 /* Image major version number */
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.word 0 /* Image minor version number */
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.word 0 /* Subsystem major version number */
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.word 0 /* Subsystem minor version number */
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.long 0 /* Reserved */
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.long _filesz /* Total image size */
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.long _prefix_filesz /* Total header size */
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.long 0 /* "Checksum" */
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.word 0x0a /* Subsystem: EFI */
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.word 0 /* DLL characteristics */
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.long 0 /* Size of stack reserve */
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.long 0 /* Size of stack commit */
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.long 0 /* Size of heap reserve */
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.long 0 /* Size of heap commit */
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.long 0 /* Loader flags */
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.long 16 /* Number of data directory entries */
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.long 0, 0 /* Export directory */
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.long 0, 0 /* Import directory */
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.long 0, 0 /* Resource directory */
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.long 0, 0 /* Exception directory */
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.long 0, 0 /* Security directory */
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.long _reloc_lma, _reloc_filesz /* Base relocation directory */
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.long debugdir_lma, debugdir_size /* Debug directory */
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.long 0, 0 /* Description directory */
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.long 0, 0 /* Special directory */
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.long 0, 0 /* Thread storage directory */
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.long 0, 0 /* Load configuration directory */
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.long 0, 0 /* Bound import directory */
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.long 0, 0 /* Import address table directory */
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.long 0, 0 /* Delay import directory */
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.long 0, 0 /* Reserved */
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.long 0, 0 /* Reserved */
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.size opthdr, . - opthdr
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.equ opthdr_size, . - opthdr
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/* PE sections */
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pe_sections:
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text_section:
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.asciz ".text" /* Section name */
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.align 8
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.long _text_filesz /* Section size */
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.long _text_lma /* Relative Virtual Address */
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.long _text_filesz /* Section size (rounded up) */
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.long _text_lma /* Pointer to raw data */
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.long 0 /* Link-time relocations */
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.long 0 /* Line numbers */
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.word 0 /* Number of link-time relocations */
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.word 0 /* Number of line numbers */
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.long 0x68000020 /* Characteristics */
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rodata_section:
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.asciz ".rodata" /* Section name */
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.align 8
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.long _rodata_filesz /* Section size */
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.long _rodata_lma /* Relative Virtual Address */
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.long _rodata_filesz /* Section size (rounded up) */
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.long _rodata_lma /* Pointer to raw data */
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.long 0 /* Link-time relocations */
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.long 0 /* Line numbers */
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.word 0 /* Number of link-time relocations */
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.word 0 /* Number of line numbers */
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.long 0x48000040 /* Characteristics */
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data_section:
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.asciz ".data" /* Section name */
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.align 8
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.long _data_filesz /* Section size */
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.long _data_lma /* Relative Virtual Address */
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.long _data_filesz /* Section size (rounded up) */
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.long _data_lma /* Pointer to raw data */
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.long 0 /* Link-time relocations */
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.long 0 /* Line numbers */
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.word 0 /* Number of link-time relocations */
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.word 0 /* Number of line numbers */
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.long 0xc8000040 /* Characteristics */
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reloc_section:
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.asciz ".reloc" /* Section name */
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.align 8
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.long _reloc_filesz /* Section size */
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.long _reloc_lma /* Relative Virtual Address */
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.long _reloc_filesz /* Section size (rounded up) */
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.long _reloc_lma /* Pointer to raw data */
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.long 0 /* Link-time relocations */
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.long 0 /* Line numbers */
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.word 0 /* Number of link-time relocations */
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.word 0 /* Number of line numbers */
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.long 0x42000040 /* Characteristics */
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pe_sections_end:
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.size pe_sections, . - pe_sections
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.equ num_pe_sections, ( ( . - pe_sections ) / 0x28 )
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/* Debug directory */
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.section ".rodata"
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.globl debugdir
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debugdir:
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.long 0 /* Characteristics */
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.long 0x10d1a884 /* Timestamp */
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.word 0 /* Major version */
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.word 0 /* Minor version */
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.long 0x02 /* RSDS? */
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.long codeview_rsds_size /* Size of data */
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.long codeview_rsds_lma /* RVA */
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.long codeview_rsds_lma /* File offset */
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.size debugdir, . - debugdir
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.equ debugdir_size, . - debugdir
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/* Codeview structure */
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.globl codeview_rsds
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codeview_rsds:
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.ascii "RSDS" /* Magic number */
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.long 0, 0, 0, 0, 0 /* Unused by EFI */
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.asciz "efiprefix.pdb"
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.size codeview_rsds, . - codeview_rsds
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.equ codeview_rsds_size, . - codeview_rsds
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