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[efi] Align EFI image sections by page size

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For optimal memory permission management, PE sections need to be
aligned by the platform's minimum page size.  Currently, the PE
section alignment is fixed to 32 bytes, which is below the typical 4kB
page size.  Align all sections to 4kB and adjust ELF to PE image
conversion accordingly.

Signed-off-by: Marvin Häuser <mhaeuser@posteo.de>
This commit is contained in:
Marvin Häuser
2021-04-08 20:04:16 +02:00
committed by Michael Brown
parent 1cc8756511
commit f1e9e2b062
2 changed files with 33 additions and 20 deletions
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18
src/scripts/efi.lds
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@@ -8,22 +8,22 @@
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
* contiguous. Each section is aligned to at least _page_align,
* which defaults to 4096. Load addresses are equal to virtual
* addresses.
*/
_max_align = 32;
_page_align = 4096;
/* Allow plenty of space for file headers */
. = 0x1000;
/* Allow one page of space for file headers, common PE/COFF layout */
. = _page_align;
/*
* The text section
*
*/
. = ALIGN ( _max_align );
. = ALIGN ( _page_align );
.text : {
_text = .;
*(.text)
@@ -36,7 +36,7 @@ SECTIONS {
*
*/
. = ALIGN ( _max_align );
. = ALIGN ( _page_align );
.rodata : {
_rodata = .;
*(.rodata)
@@ -49,7 +49,7 @@ SECTIONS {
*
*/
. = ALIGN ( _max_align );
. = ALIGN ( _page_align );
.data : {
_data = .;
*(.data)
@@ -65,7 +65,7 @@ SECTIONS {
*
*/
. = ALIGN ( _max_align );
. = ALIGN ( _page_align );
.bss : {
_bss = .;
*(.bss)