i386/ucla/src/lab3/kern/trapentry.S

   1 /* See COPYRIGHT for copyright information. */
   2
   3 #include <inc/mmu.h>
   4 #include <inc/memlayout.h>
   5 #include <inc/trap.h>
   6
   7
   8
   9 ###################################################################
  10 # exceptions/interrupts
  11 ###################################################################
  12
  13 /* The TRAPHANDLER macro defines a globally-visible function for handling
  14  * a trap.
  15  * The function can be referenced from C++ after you declare it, for
  16  * instance using "asmlinkage FUNCTIONNAME()".
  17  * It pushes a trap number onto the stack, then jumps to _alltraps.
  18  * Use TRAPHANDLER for traps where the CPU automatically pushes an error code.
  19  */
  20 #define TRAPHANDLER(name, num)                                          \
  21         .globl name;            /* define global symbol for 'name' */   \
  22         .type name, @function;  /* symbol type is function */           \
  23         .align 2;               /* align function definition */         \
  24         name:                   /* function starts here */              \
  25         pushl $(num);                                                   \
  26         jmp _alltraps
  27
  28 /* Use TRAPHANDLER_NOEC for traps where the CPU doesn't push an error code.
  29  * It pushes a 0 in place of the error code, so the trap frame has the same
  30  * format in either case.
  31  */
  32 #define TRAPHANDLER_NOEC(name, num)                                     \
  33         .globl name;                                                    \
  34         .type name, @function;                                          \
  35         .align 2;                                                       \
  36         name:                                                           \
  37         pushl $0;                                                       \
  38         pushl $(num);                                                   \
  39         jmp _alltraps
  40
  41 .text
  42
  43 /*
  44  * Lab 2: Your code here for generating entry points for the different traps.
  45  */
  46 /*
  47  * Lab 2: Your code here for _alltraps
  48  */
  49