add lab answers

2014-08-20 15:42:20 +08:00
parent d9ec12887b
commit f9773095fe
731 changed files with 92876 additions and 0 deletions
--- a/labcodes_answer/lab4_result/kern/trap/trap.h
+++ b/labcodes_answer/lab4_result/kern/trap/trap.h
@@ -0,0 +1,91 @@
+#ifndef __KERN_TRAP_TRAP_H__
+#define __KERN_TRAP_TRAP_H__
+
+#include <defs.h>
+
+/* Trap Numbers */
+
+/* Processor-defined: */
+#define T_DIVIDE                0   // divide error
+#define T_DEBUG                 1   // debug exception
+#define T_NMI                   2   // non-maskable interrupt
+#define T_BRKPT                 3   // breakpoint
+#define T_OFLOW                 4   // overflow
+#define T_BOUND                 5   // bounds check
+#define T_ILLOP                 6   // illegal opcode
+#define T_DEVICE                7   // device not available
+#define T_DBLFLT                8   // double fault
+// #define T_COPROC             9   // reserved (not used since 486)
+#define T_TSS                   10  // invalid task switch segment
+#define T_SEGNP                 11  // segment not present
+#define T_STACK                 12  // stack exception
+#define T_GPFLT                 13  // general protection fault
+#define T_PGFLT                 14  // page fault
+// #define T_RES                15  // reserved
+#define T_FPERR                 16  // floating point error
+#define T_ALIGN                 17  // aligment check
+#define T_MCHK                  18  // machine check
+#define T_SIMDERR               19  // SIMD floating point error
+
+#define T_SYSCALL               0x80 // SYSCALL, ONLY FOR THIS PROJ
+
+/* Hardware IRQ numbers. We receive these as (IRQ_OFFSET + IRQ_xx) */
+#define IRQ_OFFSET              32  // IRQ 0 corresponds to int IRQ_OFFSET
+
+#define IRQ_TIMER               0
+#define IRQ_KBD                 1
+#define IRQ_COM1                4
+#define IRQ_IDE1                14
+#define IRQ_IDE2                15
+#define IRQ_ERROR               19
+#define IRQ_SPURIOUS            31
+
+/* *
+ * These are arbitrarily chosen, but with care not to overlap
+ * processor defined exceptions or interrupt vectors.
+ * */
+#define T_SWITCH_TOU                120    // user/kernel switch
+#define T_SWITCH_TOK                121    // user/kernel switch
+
+/* registers as pushed by pushal */
+struct pushregs {
+    uint32_t reg_edi;
+    uint32_t reg_esi;
+    uint32_t reg_ebp;
+    uint32_t reg_oesp;          /* Useless */
+    uint32_t reg_ebx;
+    uint32_t reg_edx;
+    uint32_t reg_ecx;
+    uint32_t reg_eax;
+};
+
+struct trapframe {
+    struct pushregs tf_regs;
+    uint16_t tf_gs;
+    uint16_t tf_padding0;
+    uint16_t tf_fs;
+    uint16_t tf_padding1;
+    uint16_t tf_es;
+    uint16_t tf_padding2;
+    uint16_t tf_ds;
+    uint16_t tf_padding3;
+    uint32_t tf_trapno;
+    /* below here defined by x86 hardware */
+    uint32_t tf_err;
+    uintptr_t tf_eip;
+    uint16_t tf_cs;
+    uint16_t tf_padding4;
+    uint32_t tf_eflags;
+    /* below here only when crossing rings, such as from user to kernel */
+    uintptr_t tf_esp;
+    uint16_t tf_ss;
+    uint16_t tf_padding5;
+} __attribute__((packed));
+
+void idt_init(void);
+void print_trapframe(struct trapframe *tf);
+void print_regs(struct pushregs *regs);
+bool trap_in_kernel(struct trapframe *tf);
+
+#endif /* !__KERN_TRAP_TRAP_H__ */
+