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[efi] Use elf2efi utility in place of efilink

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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
2009-01-07 02:05:51 +00:00
parent 85e5e25c52
commit 314779eb36
16 changed files with 939 additions and 1258 deletions
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180
src/arch/i386/scripts/efi.lds
View File

@@ -1,180 +0,0 @@
/* -*- sh -*- */
/*
* Linker script for EFI images
*
*/
EXTERN ( efi_entry )
SECTIONS {
/* The file starts at a virtual address of zero, and sections are
* contiguous. Each section is aligned to at least _max_align,
* which defaults to 32. Load addresses are equal to virtual
* addresses.
*/
. = 0;
PROVIDE ( _max_align = 32 );
/*
* The prefix
*
*/
.prefix : {
_prefix = .;
*(.prefix)
*(.prefix.*)
_mprefix = .;
} .bss.prefix (NOLOAD) : {
_eprefix = .;
}
_prefix_filesz = ABSOLUTE ( _mprefix - _prefix );
_prefix_memsz = ABSOLUTE ( _eprefix - _prefix );
/*
* The text section
*
*/
. = ALIGN ( _max_align );
.text : {
_text = .;
*(.text)
*(.text.*)
_mtext = .;
} .bss.text (NOLOAD) : {
_etext = .;
}
_text_filesz = ABSOLUTE ( _mtext - _text );
_text_memsz = ABSOLUTE ( _etext - _text );
/*
* The rodata section
*
*/
. = ALIGN ( _max_align );
.rodata : {
_rodata = .;
*(.rodata)
*(.rodata.*)
_mrodata = .;
} .bss.rodata (NOLOAD) : {
_erodata = .;
}
_rodata_filesz = ABSOLUTE ( _mrodata - _rodata );
_rodata_memsz = ABSOLUTE ( _erodata - _rodata );
/*
* The data section
*
*/
. = ALIGN ( _max_align );
.data : {
_data = .;
*(.data)
*(.data.*)
*(SORT(.tbl.*)) /* Various tables. See include/tables.h */
/* EFI seems to not support proper bss sections */
*(.bss)
*(.bss.*)
*(COMMON)
*(.stack)
*(.stack.*)
_mdata = .;
} .bss.data (NOLOAD) : {
_edata = .;
}
_data_filesz = ABSOLUTE ( _mdata - _data );
_data_memsz = ABSOLUTE ( _edata - _data );
/*
* The bss section
*
*/
. = ALIGN ( _max_align );
.bss : {
_bss = .;
/* EFI seems to not support proper bss sections */
_mbss = .;
} .bss.bss (NOLOAD) : {
_ebss = .;
}
_bss_filesz = ABSOLUTE ( _mbss - _bss );
_bss_memsz = ABSOLUTE ( _ebss - _bss );
/*
* The reloc section
*
*/
. = ALIGN ( _max_align );
.reloc : {
_reloc = .;
/* Provide some dummy contents to force ld to include this
* section. It will be created by the efilink utility.
*/
. += 1;
_mreloc = .;
} .bss.reloc (NOLOAD) : {
_ereloc = .;
}
_reloc_filesz = ABSOLUTE ( _mreloc - _reloc );
_reloc_memsz = ABSOLUTE ( _ereloc - _reloc );
_filesz = ABSOLUTE ( . );
/*
* Weak symbols that need zero values if not otherwise defined
*
*/
.weak 0x0 : {
_weak = .;
*(.weak)
_eweak = .;
}
_assert = ASSERT ( ( _weak == _eweak ), ".weak is non-zero length" );
/*
* Dispose of the comment and note sections to make the link map
* easier to read
*
*/
/DISCARD/ : {
*(.comment)
*(.comment.*)
*(.note)
*(.note.*)
*(.eh_frame)
*(.eh_frame.*)
*(.rel)
*(.rel.*)
}
/*
* Load address calculations.
*
*/
_prefix_lma = ABSOLUTE ( _prefix );
_text_lma = ABSOLUTE ( _text );
_rodata_lma = ABSOLUTE ( _rodata );
_data_lma = ABSOLUTE ( _data );
_bss_lma = ABSOLUTE ( _bss );
_reloc_lma = ABSOLUTE ( _reloc );
/*
* Load addresses required by the prefix
*
*/
efi_entry_lma = ABSOLUTE ( efi_entry );
debugdir_lma = ABSOLUTE ( debugdir );
codeview_rsds_lma = ABSOLUTE ( codeview_rsds );
}