From 5c1b071a0ce8ad5a120ec32e37ffc9c17fb09b29 Mon Sep 17 00:00:00 2001 From: d1zzy126 Date: Fri, 14 Apr 2023 14:06:43 +0800 Subject: [PATCH] [HUST][CSE]mips/common/exception.c/rt_set_except_vector (#7238) * mips/common/exception.c/rt_set_except_vector * Update exception.c --------- Co-authored-by: Bernard Xiong --- libcpu/mips/common/exception.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libcpu/mips/common/exception.c b/libcpu/mips/common/exception.c index ca048a926b..5c458c9eb1 100644 --- a/libcpu/mips/common/exception.c +++ b/libcpu/mips/common/exception.c @@ -82,13 +82,14 @@ exception_func_t sys_exception_handlers[RT_EXCEPTION_MAX]; */ exception_func_t rt_set_except_vector(int n, exception_func_t func) { - exception_func_t old_handler = sys_exception_handlers[n]; + exception_func_t old_handler; - if ((n == 0) || (n > RT_EXCEPTION_MAX) || (!func)) + if ((n < 0) || (n >= RT_EXCEPTION_MAX) || (!func)) { return 0; } + old_handler = sys_exception_handlers[n]; sys_exception_handlers[n] = func; return old_handler;