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Add guards

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This commit is contained in:
Braiden Vasco 2017-11-03 03:14:46 +00:00
parent 545e2aef7d
commit 3eb3c34275
3 changed files with 29 additions and 1 deletions
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10
arch/config.h
View file

@ -20,4 +20,14 @@
#define GDT_USER_CS_SELECTOR GDT_SEGMENT_SELECTOR(GDT_USER_CS_INDEX)
#define GDT_USER_DS_SELECTOR GDT_SEGMENT_SELECTOR(GDT_USER_DS_INDEX)
#define INT_EXCEPTION_COUNT 32
#define INT_HWINT_COUNT 16
#define INT_TOTAL_COUNT (INT_EXCEPTION_COUNT + INT_HWINT_COUNT)
#define INT_EXCEPTION_FIRST 0
#define INT_EXCEPTION_LAST (INT_EXCEPTION_FIRST + INT_EXCEPTION_COUNT - 1)
#define INT_HWINT_FIRST (INT_EXCEPTION_LAST + 1)
#define INT_HWINT_LAST (INT_HWINT_FIRST + INT_HWINT_COUNT - 1)
#endif

8
arch/exception.c
View file

@ -1,3 +1,4 @@
#include "config.h"
#include "logger.h"
struct IsrRegisters {
@ -44,5 +45,12 @@ static const char *const messages[] = {
void exception_handler(struct IsrRegisters regs)
{
if (
!(regs.int_no >= INT_EXCEPTION_FIRST &&
regs.int_no <= INT_EXCEPTION_LAST)
) {
return;
}
logger_warn(messages[regs.int_no]);
}

12
arch/hwint.c
View file

@ -1,3 +1,4 @@
#include "config.h"
#include "logger.h"
struct IsrRegisters {
@ -28,5 +29,14 @@ static const char *const messages[] = {
void hwint_handler(struct IsrRegisters regs)
{
logger_warn(messages[regs.int_no - 32]);
if (
!(regs.int_no >= INT_HWINT_FIRST &&
regs.int_no <= INT_HWINT_LAST)
) {
return;
}
const unsigned char hwint_no = regs.int_no - INT_HWINT_FIRST;
logger_warn(messages[hwint_no]);
}