Commit 4cc2f7a8 authored Dec 28, 2006 by Paul Brook Committed by Russell King Dec 30, 2006

[ARM] 4074/1: Flat loader stack alignment



The ARM EABI requires doubleword (8-byte) stack alignment at all public entry
points.  The patch below makes the bFLT loader honour this.
It's always safe to start with a doubleword aligned stack so it doesn't seem
worth making this conditional on CONFIG_AEABI.

Paul

Signed-off-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 431d2cd9

include/asm-arm/flat.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -5,7 +5,9 @@
		#ifndef __ARM_FLAT_H__
		#define __ARM_FLAT_H__

		#define flat_stack_align(sp) /* nothing needed */
		/* An odd number of words will be pushed after this alignment, so
		deliberately misalign the value. */
		#define flat_stack_align(sp) sp = (void *)(((unsigned long)(sp) - 4) \| 4)
		#define flat_argvp_envp_on_stack() 1
		#define flat_old_ram_flag(flags) (flags)
		#define flat_reloc_valid(reloc, size) ((reloc) <= (size))

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