primitive fork and exit system calls

1 files changed, 26 insertions, 0 deletions

diff --git a/traps.h b/traps.h
new file mode 100644
index 0000000..a81903c
--- /dev/null
+++ b/traps.h
@@ -0,0 +1,26 @@
+// system 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 generated by recent processors)
+#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		// genernal 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
+
+// These are arbitrarily chosen, but with care not to overlap
+// processor defined exceptions or interrupt vectors.
+#define T_SYSCALL   48		// system call
+#define T_DEFAULT   500		// catchall