Your Name
59 lines
1.7 KiB
Diff
59 lines
1.7 KiB
Diff
From 7c5e40d9f8699a55ac2187c035429c643e6d0ef0 Mon Sep 17 00:00:00 2001
|
|
From: Jaxson Han <jaxson.han@arm.com>
|
|
Date: Tue, 2 Nov 2021 15:10:28 +0800
|
|
Subject: [PATCH] lds: Rearrange and mark the sections
|
|
|
|
To make it possible for the next stage to protect sections with MPU,
|
|
boot-wrapper needs to provide the text and data section information.
|
|
By rearranging the .data .rodata and .vector sections, all sections
|
|
can be split into 2 big sections:
|
|
- RO and Executable
|
|
- RW and Non-Executable
|
|
Add firmware_data to mark the boundry, thus:
|
|
firmware_start to firmware_data - 1 indicates RO and Executable section,
|
|
firmware_data to firmware_end - 1 indicates RW and Non-Executable
|
|
section.
|
|
|
|
Also, the firmware_data and firmware_end should align with 64 bytes,
|
|
since Armv8R AArch64 MPU requires it.
|
|
|
|
Issue-ID: SCM-3816
|
|
Upstream-Status: Inappropriate [other]
|
|
Implementation pending further discussion
|
|
Signed-off-by: Jaxson Han <jaxson.han@arm.com>
|
|
Change-Id: I55342aa7492f2c7b5c16ab9a6472c8cb45cff8fd
|
|
---
|
|
model.lds.S | 7 ++++++-
|
|
1 file changed, 6 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/model.lds.S b/model.lds.S
|
|
index ab98ddf..85451f9 100644
|
|
--- a/model.lds.S
|
|
+++ b/model.lds.S
|
|
@@ -63,12 +63,16 @@ SECTIONS
|
|
}
|
|
#endif
|
|
|
|
+#define FIRMWARE_ALIGN . = ALIGN(1 << 6)
|
|
.boot PHYS_OFFSET: {
|
|
PROVIDE(firmware_start = .);
|
|
*(.init)
|
|
*(.text*)
|
|
- *(.data* .rodata* .bss* COMMON)
|
|
*(.vectors)
|
|
+ *(.rodata*)
|
|
+ FIRMWARE_ALIGN;
|
|
+ PROVIDE(firmware_data = .);
|
|
+ *(.data* .bss* COMMON)
|
|
*(.stack)
|
|
PROVIDE(etext = .);
|
|
}
|
|
@@ -77,6 +81,7 @@ SECTIONS
|
|
mbox = .;
|
|
QUAD(0x0)
|
|
}
|
|
+ FIRMWARE_ALIGN;
|
|
PROVIDE(firmware_end = .);
|
|
|
|
ASSERT(etext <= (PHYS_OFFSET + TEXT_LIMIT), ".text overflow!")
|