inc/stab.h

   1 #ifndef JOS_STAB_H
   2 #define JOS_STAB_H
   3 #include <inc/types.h>
   4
   5 // <inc/stab.h>
   6 // STABS debugging info
   7
   8 // The JOS kernel debugger can understand some debugging information
   9 // in the STABS format.  For more information on this format, see
  10 // http://sources.redhat.com/gdb/onlinedocs/stabs_toc.html
  11
  12 // The constants below define some symbol types used by various debuggers
  13 // and compilers.  JOS uses the N_SO, N_SOL, N_FUN, and N_SLINE types.
  14
  15 #define N_GSYM          0x20    // global symbol
  16 #define N_FNAME         0x22    // F77 function name
  17 #define N_FUN           0x24    // procedure name
  18 #define N_STSYM         0x26    // data segment variable
  19 #define N_LCSYM         0x28    // bss segment variable
  20 #define N_MAIN          0x2a    // main function name
  21 #define N_PC            0x30    // global Pascal symbol
  22 #define N_RSYM          0x40    // register variable
  23 #define N_SLINE         0x44    // text segment line number
  24 #define N_DSLINE        0x46    // data segment line number
  25 #define N_BSLINE        0x48    // bss segment line number
  26 #define N_SSYM          0x60    // structure/union element
  27 #define N_SO            0x64    // main source file name
  28 #define N_LSYM          0x80    // stack variable
  29 #define N_BINCL         0x82    // include file beginning
  30 #define N_SOL           0x84    // included source file name
  31 #define N_PSYM          0xa0    // parameter variable
  32 #define N_EINCL         0xa2    // include file end
  33 #define N_ENTRY         0xa4    // alternate entry point
  34 #define N_LBRAC         0xc0    // left bracket
  35 #define N_EXCL          0xc2    // deleted include file
  36 #define N_RBRAC         0xe0    // right bracket
  37 #define N_BCOMM         0xe2    // begin common
  38 #define N_ECOMM         0xe4    // end common
  39 #define N_ECOML         0xe8    // end common (local name)
  40 #define N_LENG          0xfe    // length of preceding entry
  41
  42 // Entries in the STABS table are formatted as follows.
  43 struct Stab {
  44         uint32_t n_strx;        // index into string table of name
  45         uint8_t n_type;         // type of symbol
  46         uint8_t n_other;        // misc info (usually empty)
  47         uint16_t n_desc;        // description field
  48         uintptr_t n_value;      // value of symbol
  49 };
  50
  51 #endif /* !JOS_STAB_H */