gdbmach.h File Reference

Dummy GDB architecture specifics. More...

#include <stdint.h>

Go to the source code of this file.

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

Enumerations
enum	{ GDBMACH_NREGS }

Functions
	FILE_SECBOOT (FORBIDDEN)
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.
void	gdbmach_init (void)
	Initialise GDB.

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 25 of file gdbmach.h.

Referenced by gdbstub_read_regs(), and gdbstub_write_regs().

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
GDBMACH_NREGS

Definition at line 20 of file gdbmach.h.

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

Function Documentation

FILE_SECBOOT()

FILE_SECBOOT

(

FORBIDDEN

)

gdbmach_set_pc()

void gdbmach_set_pc ( gdbreg_t * regs, gdbreg_t pc )

inlinestatic

Definition at line 27 of file gdbmach.h.

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

References regs.

gdbmach_set_single_step()

void gdbmach_set_single_step ( gdbreg_t * regs, int step )

inlinestatic

Definition at line 33 of file gdbmach.h.

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

References regs, and step().

gdbmach_breakpoint()

void gdbmach_breakpoint ( void )

inlinestatic

Definition at line 39 of file gdbmach.h.

                                               {
        /* Not yet implemented */
}

gdbmach_set_breakpoint()

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

extern

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 134 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, and type.

Referenced by gdbstub_breakpoint().

gdbmach_init()

void gdbmach_init ( void )

extern

Initialise GDB.

Definition at line 242 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] );
        }
}

References gdbmach_vectors, and set_interrupt_vector().

Referenced by gdbstub_start().