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[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>
hifive-unleashed-5.1
Paul Brook 2006-12-28 01:54:16 +01:00 committed by Russell King
parent 431d2cd99f
commit 4cc2f7a84d
1 changed files with 3 additions and 1 deletions
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4
include/asm-arm/flat.h
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@ -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))