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ARM: add additional table to compressed kernel

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Add an additional extendable table to the compressed kernel so that we
can provide further information to boot loaders regarding the properties
of the image contained within.

This is necessary for correct behaviour of kexec.

Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King
2017-09-21 18:10:19 +01:00
parent 429f7a062e
commit c772568788
2 changed files with 13 additions and 0 deletions
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11
arch/arm/boot/compressed/vmlinux.lds.S
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@@ -44,12 +44,22 @@ SECTIONS
*(.glue_7t)
*(.glue_7)
}
.table : ALIGN(4) {
_table_start = .;
LONG(ZIMAGE_MAGIC(2))
LONG(ZIMAGE_MAGIC(0x5a534c4b))
LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
LONG(ZIMAGE_MAGIC(_kernel_bss_size))
LONG(0)
_table_end = .;
}
.rodata : {
*(.rodata)
*(.rodata.*)
}
.piggydata : {
*(.piggydata)
__piggy_size_addr = . - 4;
}
. = ALIGN(4);
@@ -88,6 +98,7 @@ SECTIONS
_magic_sig = ZIMAGE_MAGIC(0x016f2818);
_magic_start = ZIMAGE_MAGIC(_start);
_magic_end = ZIMAGE_MAGIC(_edata);
_magic_table = ZIMAGE_MAGIC(_table_start - _start);
. = BSS_START;
__bss_start = .;