LAB 4 IS DONE.

lab/inc/stab.h

@@ -0,0 +1,51 @@
+#ifndef JOS_STAB_H
+#define JOS_STAB_H
+#include <inc/types.h>
+
+// <inc/stab.h>
+// STABS debugging info
+
+// The JOS kernel debugger can understand some debugging information
+// in the STABS format.  For more information on this format, see
+// http://sourceware.org/gdb/onlinedocs/stabs.html
+
+// The constants below define some symbol types used by various debuggers
+// and compilers.  JOS uses the N_SO, N_SOL, N_FUN, and N_SLINE types.
+
+#define	N_GSYM		0x20	// global symbol
+#define	N_FNAME		0x22	// F77 function name
+#define	N_FUN		0x24	// procedure name
+#define	N_STSYM		0x26	// data segment variable
+#define	N_LCSYM		0x28	// bss segment variable
+#define	N_MAIN		0x2a	// main function name
+#define	N_PC		0x30	// global Pascal symbol
+#define	N_RSYM		0x40	// register variable
+#define	N_SLINE		0x44	// text segment line number
+#define	N_DSLINE	0x46	// data segment line number
+#define	N_BSLINE	0x48	// bss segment line number
+#define	N_SSYM		0x60	// structure/union element
+#define	N_SO		0x64	// main source file name
+#define	N_LSYM		0x80	// stack variable
+#define	N_BINCL		0x82	// include file beginning
+#define	N_SOL		0x84	// included source file name
+#define	N_PSYM		0xa0	// parameter variable
+#define	N_EINCL		0xa2	// include file end
+#define	N_ENTRY		0xa4	// alternate entry point
+#define	N_LBRAC		0xc0	// left bracket
+#define	N_EXCL		0xc2	// deleted include file
+#define	N_RBRAC		0xe0	// right bracket
+#define	N_BCOMM		0xe2	// begin common
+#define	N_ECOMM		0xe4	// end common
+#define	N_ECOML		0xe8	// end common (local name)
+#define	N_LENG		0xfe	// length of preceding entry
+
+// Entries in the STABS table are formatted as follows.
+struct Stab {
+	uint32_t n_strx;	// index into string table of name
+	uint8_t n_type;         // type of symbol
+	uint8_t n_other;        // misc info (usually empty)
+	uint16_t n_desc;        // description field
+	uintptr_t n_value;	// value of symbol
+};
+
+#endif /* !JOS_STAB_H */