X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fthreads%2Finterrupt.h;h=d43e06d90831f76d54e04c4693765565f96ded7c;hb=a03618133f7df0954802a470a4bee7674f7aed45;hp=adb7fa99b4a424e116914551c4edb0f3d2d30d20;hpb=2c5bb7cae7970d66a988c5d8b096352b314a9c8e;p=pintos-anon

diff --git a/src/threads/interrupt.h b/src/threads/interrupt.h
index adb7fa9..d43e06d 100644
--- a/src/threads/interrupt.h
+++ b/src/threads/interrupt.h
@@ -19,7 +19,7 @@ enum intr_level intr_disable (void);
 /* Interrupt stack frame. */
 struct intr_frame
   {
-    /* Pushed by intr_entry in intr-stubs.S (see intr-stubs.pl).
+    /* Pushed by intr_entry in intr-stubs.S.
        These are the interrupted task's saved registers. */
     uint32_t edi;               /* Saved EDI. */
     uint32_t esi;               /* Saved ESI. */
@@ -29,19 +29,26 @@ struct intr_frame
     uint32_t edx;               /* Saved EDX. */
     uint32_t ecx;               /* Saved ECX. */
     uint32_t eax;               /* Saved EAX. */
+    uint16_t gs, :16;           /* Saved GS segment register. */
+    uint16_t fs, :16;           /* Saved FS segment register. */
     uint16_t es, :16;           /* Saved ES segment register. */
     uint16_t ds, :16;           /* Saved DS segment register. */
 
-    /* Pushed by intrXX_stub in intr-stubs.S (see intr-stubs.pl). */
+    /* Pushed by intrNN_stub in intr-stubs.S. */
     uint32_t vec_no;            /* Interrupt vector number. */
 
     /* Sometimes pushed by the CPU,
-       otherwise for consistency pushed as 0 by intrXX_stub. */
+       otherwise for consistency pushed as 0 by intrNN_stub.
+       The CPU puts it just under `eip', but we move it here. */
     uint32_t error_code;        /* Error code. */
 
+    /* Pushed by intrNN_stub in intr-stubs.S.
+       This frame pointer eases interpretation of backtraces. */
+    void *frame_pointer;        /* Saved EBP (frame pointer). */
+
     /* Pushed by the CPU.
        These are the interrupted task's saved registers. */
-    void (*eip) (void);         /* Current or next instruction. */
+    void (*eip) (void);         /* Next instruction to execute. */
     uint16_t cs, :16;           /* Code segment for eip. */
     uint32_t eflags;            /* Saved CPU flags. */
     void *esp;                  /* Saved stack pointer. */
@@ -51,8 +58,9 @@ struct intr_frame
 typedef void intr_handler_func (struct intr_frame *);
 
 void intr_init (void);
-void intr_register (uint8_t vec, int dpl, enum intr_level, intr_handler_func *,
-                    const char *name);
+void intr_register_ext (uint8_t vec, intr_handler_func *, const char *name);
+void intr_register_int (uint8_t vec, int dpl, enum intr_level,
+                        intr_handler_func *, const char *name);
 bool intr_context (void);
 void intr_yield_on_return (void);