feat(isr): add assembly code for interrupt routines

k/isr.S

@@ -0,0 +1,46 @@
+.section .text
+
+isr:
+pushal              // save registers
+
+pushl   %esp
+call    generic_c_handler
+
+add     $4, %esp
+popal               // restore registers
+add     $8, %esp
+
+iret
+
+#define ISR_ERRCODE(ISR_NAME, INT_CODE) \
+    .global ISR_NAME;                   \
+    ISR_NAME:;                          \
+    pushl   $INT_CODE;                  \
+    jmp     isr;                        \
+
+#define ISR_NO_ERRCODE(ISR_NAME, INT_CODE) \
+    .global ISR_NAME;                      \
+    ISR_NAME:;                             \
+    pushl   $0;                            \
+    pushl   $INT_CODE;                     \
+    jmp     isr;                           \
+
+ISR_NO_ERRCODE(int_de, 0)
+ISR_NO_ERRCODE(int_db, 1)
+ISR_NO_ERRCODE(int_nmi, 2)
+ISR_NO_ERRCODE(int_bp, 3)
+ISR_NO_ERRCODE(int_of, 4)
+ISR_NO_ERRCODE(int_br, 5)
+ISR_NO_ERRCODE(int_ud, 6)
+ISR_NO_ERRCODE(int_nm, 7)
+ISR_ERRCODE(int_df, 8)
+ISR_ERRCODE(int_ts, 10)
+ISR_ERRCODE(int_np, 11)
+ISR_ERRCODE(int_ss, 12)
+ISR_ERRCODE(int_gp, 13)
+ISR_ERRCODE(int_pf, 14)
+ISR_NO_ERRCODE(int_mf, 16)
+ISR_ERRCODE(int_ac, 17)
+ISR_NO_ERRCODE(int_mc, 18)
+ISR_NO_ERRCODE(int_xm, 19)
+ISR_NO_ERRCODE(int_ve, 20)

k/isr.h

@@ -0,0 +1,24 @@
+#ifndef ISR_H
+#define ISR_H
+
+void int_de(void);      // Divide Error
+void int_db(void);      // Debug Exception
+void int_nmi(void);     // NMI Interrupt
+void int_bp(void);      // Breakpoint
+void int_of(void);      // Overflow
+void int_br(void);      // BOUND Range Exceeded
+void int_ud(void);      // Invalid Opcode (Undefined Opcode)
+void int_nm(void);      // Device Not Available (No Math Coprocessor)
+void int_df(void);      // Double Fault
+void int_ts(void);      // Invalid TSS
+void int_np(void);      // Segment Not Present
+void int_ss(void);      // Stack-Segment Fault
+void int_gp(void);      // General Protection
+void int_pf(void);      // Page Fault
+void int_mf(void);      // x87 FPU Floating-Point Error (Math Fault)
+void int_ac(void);      // Alignment Check
+void int_mc(void);      // Machine Check
+void int_xm(void);      // SIMD Floating-Point Exception
+void int_ve(void);      // Virtualization Exception
+
+#endif  /* !ISR_H */