From: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Date: Mon, 19 May 2008 09:27:37 +0000 (+0200)
Subject: avr32: Do stricter stack checking in the exception handler
X-Git-Tag: v1.3.4-rc1~114^2~23^2~5
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=95107b7c028806919630bf02c653aa8f4f867c94;p=u-boot

avr32: Do stricter stack checking in the exception handler

Don't do a stack dump if the stack pointer is outside the memory area
reserved for stack.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
---

diff --git a/cpu/at32ap/exception.c b/cpu/at32ap/exception.c
index 0672685cd0..dc9c3002a4 100644
--- a/cpu/at32ap/exception.c
+++ b/cpu/at32ap/exception.c
@@ -111,7 +111,8 @@ void do_unknown_exception(unsigned int ecr, struct pt_regs *regs)
 	printf("CPU Mode: %s\n", cpu_modes[mode]);
 
 	/* Avoid exception loops */
-	if (regs->sp < CFG_SDRAM_BASE || regs->sp >= gd->stack_end)
+	if (regs->sp < (gd->stack_end - CONFIG_STACKSIZE)
+			|| regs->sp >= gd->stack_end)
 		printf("\nStack pointer seems bogus, won't do stack dump\n");
 	else
 		dump_mem("\nStack: ", regs->sp, gd->stack_end);