stab.h

#ifndef __KERN_DEBUG_STAB_H__
#define __KERN_DEBUG_STAB_H__

#include <defs.h>

/* *
 * STABS debugging info
 *
 * The kernel debugger can understand some debugging information in
 * the STABS format.  For more information on this format, see
 * http://sources.redhat.com/gdb/onlinedocs/stabs_toc.html
 *
 * The constants below define some symbol types used by various debuggers
 * and compilers.  Kernel 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 /* !__KERN_DEBUG_STAB_H__ */