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      1 #ifndef GDBMACH_H
      2 #define GDBMACH_H
      3 
      4 /** @file
      5  *
      6  * GDB architecture specifics
      7  *
      8  * This file declares functions for manipulating the machine state and
      9  * debugging context.
     10  *
     11  */
     12 
     13 #include <stdint.h>
     14 
     15 typedef unsigned long gdbreg_t;
     16 
     17 /* The register snapshot, this must be in sync with interrupt handler and the
     18  * GDB protocol. */
     19 enum {
     20 	GDBMACH_EAX,
     21 	GDBMACH_ECX,
     22 	GDBMACH_EDX,
     23 	GDBMACH_EBX,
     24 	GDBMACH_ESP,
     25 	GDBMACH_EBP,
     26 	GDBMACH_ESI,
     27 	GDBMACH_EDI,
     28 	GDBMACH_EIP,
     29 	GDBMACH_EFLAGS,
     30 	GDBMACH_CS,
     31 	GDBMACH_SS,
     32 	GDBMACH_DS,
     33 	GDBMACH_ES,
     34 	GDBMACH_FS,
     35 	GDBMACH_GS,
     36 	GDBMACH_NREGS,
     37 	GDBMACH_SIZEOF_REGS = GDBMACH_NREGS * sizeof ( gdbreg_t )
     38 };
     39 
     40 /* Breakpoint types */
     41 enum {
     42 	GDBMACH_BPMEM,
     43 	GDBMACH_BPHW,
     44 	GDBMACH_WATCH,
     45 	GDBMACH_RWATCH,
     46 	GDBMACH_AWATCH,
     47 };
     48 
     49 static inline void gdbmach_set_pc ( gdbreg_t *regs, gdbreg_t pc ) {
     50 	regs [ GDBMACH_EIP ] = pc;
     51 }
     52 
     53 static inline void gdbmach_set_single_step ( gdbreg_t *regs, int step ) {
     54 	regs [ GDBMACH_EFLAGS ] &= ~( 1 << 8 ); /* Trace Flag (TF) */
     55 	regs [ GDBMACH_EFLAGS ] |= ( step << 8 );
     56 }
     57 
     58 static inline void gdbmach_breakpoint ( void ) {
     59 	__asm__ __volatile__ ( "int $3\n" );
     60 }
     61 
     62 extern int gdbmach_set_breakpoint ( int type, unsigned long addr, size_t len, int enable );
     63 
     64 #endif /* GDBMACH_H */
     65