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riscv: treat undefined exception codes as reserved 

Undefined exception codes currently lead to an out-of-bounds array
access. Prevent this by treating undefined exception codes as
"reserved".

Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Lukas Auer 2018-11-22 11:26:21 +01:00 committed by Andes
parent 5a441736b7
commit e8b522b1df
1 changed files with 6 additions and 2 deletions
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4
arch/riscv/lib/interrupts.c
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@ -81,6 +81,10 @@ static void _exit_trap(ulong code, ulong epc, struct pt_regs *regs)
"Store/AMO page fault", "Store/AMO page fault",
}; };
if (code < ARRAY_SIZE(exception_code)) {
printf("exception code: %ld , %s , epc %lx , ra %lx\n", printf("exception code: %ld , %s , epc %lx , ra %lx\n",
code, exception_code[code], epc, regs->ra); code, exception_code[code], epc, regs->ra);
} else {
printf("Reserved\n");
}
} }