sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-22 21:11:03 +03:00
Code Issues Packages Projects Releases Wiki Activity

[romprefix] Add a dummy ROM header to cover the .mrom payload

Browse Source 
The header of a .mrom image declares its length to be only a few
kilobytes; the remainder is accessed via a sideband mechanism.  This
makes it difficult to append an additional ROM image, such as an EFI
ROM.

Add a second, dummy ROM header covering the payload portion of the
.mrom image, allowing consumers to locate any appended ROM images in
the usual way.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-06-10 18:25:26 +01:00
parent 12be8bc544
commit 9e8d431a0d
5 changed files with 198 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/arch/i386/scripts/i386.lds
View File

@@ -1,4 +1,4 @@
/* -*- sh -*- */
/* -*- ld-script -*- */
/*
* Linker script for i386 images
@@ -121,6 +121,23 @@ SECTIONS {
_textdata_filesz = ABSOLUTE ( _mtextdata ) - ABSOLUTE ( _textdata );
_textdata_memsz = ABSOLUTE ( _etextdata ) - ABSOLUTE ( _textdata );
/*
* Payload prefix
*
* If present, this will be placed between .text16.early and .text16.late.
*
*/
.pprefix 0x0 : AT ( _pprefix_lma ) {
_pprefix = .;
KEEP(*(.pprefix))
KEEP(*(.pprefix.*))
_mpprefix = .;
} .bss.pprefix (NOLOAD) : AT ( _end_lma ) {
_epprefix = .;
}
_pprefix_filesz = ABSOLUTE ( _mpprefix ) - ABSOLUTE ( _pprefix );
_pprefix_memsz = ABSOLUTE ( _epprefix ) - ABSOLUTE ( _pprefix );
/*
* Compressor information block
*
@@ -187,8 +204,14 @@ SECTIONS {
_text16_early_lma = .;
. += _text16_early_filesz;
. = ALIGN ( _max_align );
. = ALIGN ( _payload_align );
_pprefix_lma = .;
. += _pprefix_filesz;
. = ALIGN ( _max_align );
_payload_lma = .;
_pprefix_skip = ABSOLUTE ( _payload_lma ) - ABSOLUTE ( _pprefix_lma );
_text16_late_lma = .;
. += _text16_late_filesz;