Changeset 6de2480e in mainline for arch/ia32/src/interrupt.c

Timestamp:

2005-05-19T11:55:15Z (20 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f3ebb64

Parents:

1eee8383

Message:

IA-32 FPU lazy context switching.
Doesn't work on Bochs and sometimes produces wrong results on P4.
Seems to work on VMware and PII.

Build script for IA-32 changed to build floppy images (image.bin) 1440K long.

File:

• arch/ia32/src/interrupt.c (modified) (1 diff)

arch/ia32/src/interrupt.c

@@ -86 +86 @@
 }
 
+void ss_fault(__u8 n, __u32 stack[])
+{
+        printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
+        printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);
+        printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
+        panic("Stack fault\n");
+}
+
+
 void nm_fault(__u8 n, __u32 stack[])
 {
 
+//      printf("-1\n");        
+        reset_TS_flag();
         if ((CPU->fpu_owner)!=NULL) 
         {  
-                fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));
+//              printf("owner %X\n",(int)(&((CPU->fpu_owner)->saved_fpu_context)));        
+                fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));
+
+//              printf("owner 2\n");
                 (CPU->fpu_owner)->fpu_context_engaged=0; /* Enables migration */
+//              printf("owner 3\n");        
+
         }
-        
+//      printf("0\n");
         if(THREAD->fpu_context_exists) fpu_lazy_context_restore(&(THREAD->saved_fpu_context));
         else {fpu_init();THREAD->fpu_context_exists=1;}
-
+//      printf("1\n");
         CPU->fpu_owner=THREAD;
-
-        reset_TS_flag();
+//      printf("2\n");
         
+//      printf("3\n");  
 //      panic("#NM fault\n");
 }