Dummy GDB architecture specifics. More...

#include <stdint.h>

Macros
#define	GDBMACH_SIZEOF_REGS ( GDBMACH_NREGS * sizeof ( gdbreg_t ) )

Typedefs
typedef unsigned long	gdbreg_t

Enumerations
enum	{ GDBMACH_NREGS }

Functions
static void	gdbmach_set_pc (gdbreg_t *regs, gdbreg_t pc)

static void	gdbmach_set_single_step (gdbreg_t *regs, int step)

static void	gdbmach_breakpoint (void)

int	gdbmach_set_breakpoint (int type, unsigned long addr, size_t len, int enable)
	Set hardware breakpoint. More...

void	gdbmach_init (void)
	Initialise GDB. More...

Detailed Description

Dummy GDB architecture specifics.

This file is included only if the architecture does not provide its own version of this file.

Definition in file gdbmach.h.

Macro Definition Documentation

◆ GDBMACH_SIZEOF_REGS

#define GDBMACH_SIZEOF_REGS ( GDBMACH_NREGS * sizeof ( gdbreg_t ) )

Definition at line 23 of file gdbmach.h.

Typedef Documentation

◆ gdbreg_t

typedef unsigned long gdbreg_t

Definition at line 15 of file gdbmach.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
GDBMACH_NREGS

Definition at line 18 of file gdbmach.h.

      {
         /* Not yet implemented */
         GDBMACH_NREGS,
 };

Function Documentation

◆ gdbmach_set_pc()

static void gdbmach_set_pc	(	gdbreg_t *	regs,
		gdbreg_t	pc
	)

inlinestatic

Definition at line 25 of file gdbmach.h.

                                                                   {
         /* Not yet implemented */
         ( void ) regs;
         ( void ) pc;
 }

References regs.

◆ gdbmach_set_single_step()

static void gdbmach_set_single_step	(	gdbreg_t *	regs,
		int	step
	)

inlinestatic

Definition at line 31 of file gdbmach.h.

                                                                         {
         /* Not yet implemented */
         ( void ) regs;
         ( void ) step;
 }

References regs, and step().

◆ gdbmach_breakpoint()

static void gdbmach_breakpoint ( void )

inlinestatic

Definition at line 37 of file gdbmach.h.

                                                {
         /* Not yet implemented */
 }

◆ gdbmach_set_breakpoint()

int gdbmach_set_breakpoint	(	int	type,
		unsigned long	addr,
		size_t	len,
		int	enable
	)

Set hardware breakpoint.

Parameters

type	GDB breakpoint type
addr	Virtual address
len	Length
enable	Enable (not disable) breakpoint

Return values

rc	Return status code

Definition at line 133 of file gdbmach.c.

                                           {
         unsigned int rwlen;
         unsigned long mask;
         int bp;
 
         /* Parse breakpoint type */
         switch ( type ) {
         case GDBMACH_WATCH:
                 rwlen = DR7_RWLEN_WRITE;
                 break;
         case GDBMACH_AWATCH:
                 rwlen = DR7_RWLEN_ACCESS;
                 break;
         default:
                 return -ENOTSUP;
         }
 
         /* Parse breakpoint length */
         switch ( len ) {
         case 1:
                 rwlen |= DR7_RWLEN_1;
                 break;
         case 2:
                 rwlen |= DR7_RWLEN_2;
                 break;
         case 4:
                 rwlen |= DR7_RWLEN_4;
                 break;
         case 8:
                 rwlen |= DR7_RWLEN_8;
                 break;
         default:
                 return -ENOTSUP;
         }
 
         /* Convert to linear address */
         if ( sizeof ( physaddr_t ) <= sizeof ( uint32_t ) )
                 addr = virt_to_phys ( ( void * ) addr );
 
         /* Find reusable or available hardware breakpoint */
         bp = gdbmach_find ( addr, rwlen );
         if ( bp < 0 )
                 return ( enable ? -ENOBUFS : 0 );
 
         /* Configure this breakpoint */
         DBGC ( &dr[0], "GDB bp %d at %p+%zx type %d (%sabled)\n",
                bp, ( ( void * ) addr ), len, type, ( enable ? "en" : "dis" ) );
         dr[bp] = addr;
         mask = DR7_RWLEN_MASK ( bp );
         dr7 = ( ( dr7 & ~mask ) | ( rwlen & mask ) );
         mask = DR7_G ( bp );
         dr7 &= ~mask;
         if ( enable )
                 dr7 |= mask;
 
         /* Update debug registers */
         gdbmach_update();
 
         return 0;
 }

References addr, bp, DBGC, dr, dr7, DR7_G, DR7_RWLEN_1, DR7_RWLEN_2, DR7_RWLEN_4, DR7_RWLEN_8, DR7_RWLEN_ACCESS, DR7_RWLEN_MASK, DR7_RWLEN_WRITE, ENOBUFS, ENOTSUP, GDBMACH_AWATCH, gdbmach_find(), gdbmach_update(), GDBMACH_WATCH, len, type, and virt_to_phys().

Referenced by gdbstub_breakpoint().

◆ gdbmach_init()

void gdbmach_init ( void )

Initialise GDB.

Definition at line 241 of file gdbmach.c.

                            {
         unsigned int i;
 
         /* Hook CPU exception vectors */
         for ( i = 0 ; i < ( sizeof ( gdbmach_vectors ) /
                             sizeof ( gdbmach_vectors[0] ) ) ; i++ ) {
                 if ( gdbmach_vectors[i] )
                         set_interrupt_vector ( i, gdbmach_vectors[i] );
         }
 }