Changeset 802 for soft/giet_vm/giet_kernel/giet.s

Timestamp:

Mar 14, 2016, 3:32:41 PM (9 years ago)

Author:

alain

Message:

Improve error message print, to avoisd interleaving.

File:

• soft/giet_vm/giet_kernel/giet.s (modified) (1 diff)

soft/giet_vm/giet_kernel/giet.s

@@ -43 +43 @@
     addiu   $26,    $0,     0x20
     beq     $27,    $26,    do_jump     /* jump if syscall */
-    /* Other exception: saving registers for future display */
+
+/*  
+ * exception: save registers into stack for future display by exception handler  
+ */
+
     addiu   $27,    $29,    -38*4
-    sw      $29,    (29*4)($27)
+    sw      $29,    (29*4)($27)       /* save $29 */
     or      $29,    $27,    $0
     
     .set noat
-    sw      $1,     (1*4)($29)
+    sw      $1,     (1*4)($29)        /* save $1 */
     .set at
-    sw      $2,     (2*4)($29)
-    sw      $3,     (3*4)($29)
-    sw      $4,     (4*4)($29)
-    sw      $5,     (5*4)($29)
-    sw      $6,     (6*4)($29)
-    sw      $7,     (7*4)($29)
-    sw      $8,     (8*4)($29)
-    sw      $9,     (9*4)($29)
-    sw      $10,    (10*4)($29)
-    sw      $11,    (11*4)($29)
-    sw      $12,    (12*4)($29)
-    sw      $13,    (13*4)($29)
-    sw      $14,    (14*4)($29)
-    sw      $15,    (15*4)($29)
-    sw      $24,    (24*4)($29)
-    sw      $25,    (25*4)($29)
-    sw      $16,    (16*4)($29)
-    mfc0    $16,    $14               /* Read EPC */
-    sw      $17,    (17*4)($29)
-    mfc0    $17,    $13               /* read CR (used later) */
-    sw      $18,    (18*4)($29)
-    mfc0    $18,    $12               /* Read current SR (used later) */
-    sw      $19,    (19*4)($29)
-    sw      $20,    (20*4)($29)
-    sw      $21,    (21*4)($29)
-    sw      $22,    (22*4)($29)
-    sw      $23,    (23*4)($29)
-    sw      $30,    (30*4)($29)
-    sw      $28,    (28*4)($29)
-    mflo    $14                       /* read LO */
-    mfhi    $15                       /* read HI */
-    sw      $31,    (31*4)($29)       /* save RA */
+    sw      $2,     (2*4)($29)        /* save $2 */
+    sw      $3,     (3*4)($29)        /* save $3 */
+    sw      $4,     (4*4)($29)        /* save $4 */
+    sw      $5,     (5*4)($29)        /* save $5 */
+    sw      $6,     (6*4)($29)        /* save $6 */
+    sw      $7,     (7*4)($29)        /* save $7 */
+    sw      $8,     (8*4)($29)        /* save $8 */
+    sw      $9,     (9*4)($29)        /* save $9 */
+    sw      $10,    (10*4)($29)       /* save $10 */
+    sw      $11,    (11*4)($29)       /* save $11 */
+    sw      $12,    (12*4)($29)       /* save $12 */
+    sw      $13,    (13*4)($29)       /* save $13 */
+    sw      $14,    (14*4)($29)       /* save $14 */
+    sw      $15,    (15*4)($29)       /* save $15 */
+    sw      $16,    (16*4)($29)       /* save $16 */
+    sw      $17,    (17*4)($29)       /* save $17 */
+    sw      $18,    (18*4)($29)       /* save $18 */
+    sw      $19,    (19*4)($29)       /* save $19 */
+    sw      $20,    (20*4)($29)       /* save $20 */
+    sw      $21,    (21*4)($29)       /* save $21 */
+    sw      $22,    (22*4)($29)       /* save $22 */
+    sw      $23,    (23*4)($29)       /* save $23 */
+    sw      $24,    (24*4)($29)       /* save $24 */
+    sw      $25,    (25*4)($29)       /* save $25 */
+    sw      $28,    (28*4)($29)       /* save $28 */
+    sw      $30,    (30*4)($29)       /* save $30 */
+    sw      $31,    (31*4)($29)       /* save $31 */
+    mflo    $14                       /* LO */
+    mfhi    $15                       /* HI */
+    mfc0    $16,    $14               /* EPC */
+    mfc0    $17,    $13               /* CR */
+    mfc0    $18,    $12               /* SR */
+    mfc0    $19,    $8                /* BVAR */
+    sw      $14,    (35*4)($29)       /* save LO */
+    sw      $15,    (36*4)($29)       /* save HI */
     sw      $16,    (32*4)($29)       /* Save EPC */
     sw      $17,    (33*4)($29)       /* Save CR */
     sw      $18,    (34*4)($29)       /* Save SR */
-    sw      $14,    (35*4)($29)       /* save LO */
-    sw      $15,    (36*4)($29)       /* save HI */
-    or      $4,     $0, $27 
-    
+    sw      $19,    (37*4)($29)       /* save BVAR */
+    or      $4,     $0, $27           /* $4 <= regs_table */
     
 do_jump: