small exception changes

sw/n64/src/error.c

@@ -8,6 +8,4 @@ void error_display (const char *fmt, ...) {
     va_start(args, fmt);
     EXCEPTION_TRIGGER(TRIGGER_CODE_ERROR);
     va_end(args);
-
-    while (1);
 }

sw/n64/src/exception.S

@@ -36,7 +36,7 @@
 #define K1_OFFSET                   (216)
 #define GP_OFFSET                   (224)
 #define SP_OFFSET                   (232)
-#define FP_OFFSET                   (240)
+#define S8_OFFSET                   (240)
 #define RA_OFFSET                   (248)
 #define C0_STATUS_OFFSET            (256)
 #define C0_CAUSE_OFFSET             (260)
@@ -75,7 +75,7 @@ exception_handler:
     sd $t9, T9_OFFSET($k0)
     sd $gp, GP_OFFSET($k0)
     sd $sp, SP_OFFSET($k0)
-    sd $fp, FP_OFFSET($k0)
+    sd $s8, S8_OFFSET($k0)
     sd $ra, RA_OFFSET($k0)
     .set at
 
@@ -141,7 +141,7 @@ exception_restore:
     ld $t9, T9_OFFSET($k0)
     ld $gp, GP_OFFSET($k0)
     ld $sp, SP_OFFSET($k0)
-    ld $fp, FP_OFFSET($k0)
+    ld $s8, S8_OFFSET($k0)
     ld $ra, RA_OFFSET($k0)
     .set at
 

sw/n64/src/exception.c

@@ -1,6 +1,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include "exception.h"
+#include "exception_regs.h"
 #include "font.h"
 #include "io.h"
 #include "sc64.h"
@@ -8,53 +9,6 @@
 #include "vr4300.h"
 
 
-typedef union {
-    uint64_t u64;
-    struct {
-        uint32_t u32_h;
-        uint32_t u32;
-    };
-} uint64_32_t;
-
-typedef struct {
-    uint64_32_t zr;
-    uint64_32_t at;
-    uint64_32_t v0;
-    uint64_32_t v1;
-    uint64_32_t a0;
-    uint64_32_t a1;
-    uint64_32_t a2;
-    uint64_32_t a3;
-    uint64_32_t t0;
-    uint64_32_t t1;
-    uint64_32_t t2;
-    uint64_32_t t3;
-    uint64_32_t t4;
-    uint64_32_t t5;
-    uint64_32_t t6;
-    uint64_32_t t7;
-    uint64_32_t s0;
-    uint64_32_t s1;
-    uint64_32_t s2;
-    uint64_32_t s3;
-    uint64_32_t s4;
-    uint64_32_t s5;
-    uint64_32_t s6;
-    uint64_32_t s7;
-    uint64_32_t t8;
-    uint64_32_t t9;
-    uint64_32_t k0;
-    uint64_32_t k1;
-    uint64_32_t gp;
-    uint64_32_t sp;
-    uint64_32_t fp;
-    uint64_32_t ra;
-    uint32_t sr;
-    uint32_t cr;
-    uint64_32_t epc;
-} exception_t;
-
-
 #define EXCEPTION_INTERRUPT     (0)
 #define EXCEPTION_SYSCALL       (8)
 
@@ -271,7 +225,7 @@ void exception_fatal_handler (uint32_t exception_code, uint32_t interrupt_mask,
     exception_print("s0: 0x%08lX  s1: 0x%08lX  s2: 0x%08lX  s3: 0x%08lX\n", e->s0.u32, e->s1.u32, e->s2.u32, e->s3.u32);
     exception_print("s4: 0x%08lX  s5: 0x%08lX  s6: 0x%08lX  s7: 0x%08lX\n", e->s4.u32, e->s5.u32, e->s6.u32, e->s7.u32);
     exception_print("t8: 0x%08lX  t9: 0x%08lX  k0: 0x%08lX  k1: 0x%08lX\n", e->t8.u32, e->t9.u32, e->k0.u32, e->k1.u32);
-    exception_print("gp: 0x%08lX  sp: 0x%08lX  fp: 0x%08lX  ra: 0x%08lX\n\n", e->gp.u32, e->sp.u32, e->fp.u32, e->ra.u32);
+    exception_print("gp: 0x%08lX  sp: 0x%08lX  s8: 0x%08lX  ra: 0x%08lX\n\n", e->gp.u32, e->sp.u32, e->s8.u32, e->ra.u32);
 
     if (exception_code == EXCEPTION_INTERRUPT) {
         if (interrupt_mask & INTERRUPT_MASK_TIMER) {

sw/n64/src/exception_regs.h

@@ -0,0 +1,55 @@
+#ifndef EXCEPTION_REGS_H__
+#define EXCEPTION_REGS_H__
+
+
+#include <stdint.h>
+
+
+typedef union {
+    uint64_t u64;
+    struct {
+        uint32_t u32_h;
+        uint32_t u32;
+    };
+} uint64_32_t;
+
+typedef struct {
+    uint64_32_t zr;
+    uint64_32_t at;
+    uint64_32_t v0;
+    uint64_32_t v1;
+    uint64_32_t a0;
+    uint64_32_t a1;
+    uint64_32_t a2;
+    uint64_32_t a3;
+    uint64_32_t t0;
+    uint64_32_t t1;
+    uint64_32_t t2;
+    uint64_32_t t3;
+    uint64_32_t t4;
+    uint64_32_t t5;
+    uint64_32_t t6;
+    uint64_32_t t7;
+    uint64_32_t s0;
+    uint64_32_t s1;
+    uint64_32_t s2;
+    uint64_32_t s3;
+    uint64_32_t s4;
+    uint64_32_t s5;
+    uint64_32_t s6;
+    uint64_32_t s7;
+    uint64_32_t t8;
+    uint64_32_t t9;
+    uint64_32_t k0;
+    uint64_32_t k1;
+    uint64_32_t gp;
+    uint64_32_t sp;
+    uint64_32_t s8;
+    uint64_32_t ra;
+    uint32_t sr;
+    uint32_t cr;
+    uint64_32_t epc;
+} exception_t;
+
+
+#endif

sw/n64/src/interrupt.c

@@ -1,6 +1,6 @@
-#include "io.h"
+#include "exception_regs.h"
 
 
-void exception_interrupt_handler (uint32_t exception_code, uint32_t interrupt_mask) {
+void exception_interrupt_handler (uint32_t exception_code, uint32_t interrupt_mask, exception_t *e) {
     while (1);
 }