Do not crash on handled traps.
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@ -198,8 +198,10 @@ trap_dispatch(struct Trapframe *tf)
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// LAB 3: Your code here.
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if (tf->tf_trapno == T_PGFLT) {
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page_fault_handler(tf);
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return;
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} else if (tf->tf_trapno == T_BRKPT) {
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monitor(tf);
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return;
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} else if (tf->tf_trapno == T_SYSCALL) {
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syscall(tf->tf_regs.reg_eax,
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tf->tf_regs.reg_edx,
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@ -207,6 +209,7 @@ trap_dispatch(struct Trapframe *tf)
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tf->tf_regs.reg_ebx,
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tf->tf_regs.reg_edi,
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tf->tf_regs.reg_esi);
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return;
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}
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// Unexpected trap: The user process or the kernel has a bug.
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