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avr32: Do stricter stack checking in the exception handler

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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>
This commit is contained in:
Haavard Skinnemoen 2008-05-19 11:27:37 +02:00
parent caf83ea888
commit 95107b7c02
1 changed files with 2 additions and 1 deletions
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3
cpu/at32ap/exception.c
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@ -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);