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/*
* debug.c
*
* xen pervasive debugger
*/
#include <xen/config.h>
#include <xen/types.h>
#include <xen/lib.h>
#include <hypervisor-ifs/dom0_ops.h>
#include <xen/sched.h>
#include <xen/event.h>
#include <asm/page.h>
#include <asm/pdb.h>
#include <asm/shadow.h>
#undef DEBUG_TRACE
#ifdef DEBUG_TRACE
#define TRC(_x) _x
#else
#define TRC(_x)
#endif
/****************************************************************************/
extern u_char pdb_linux_get_value(int pid, unsigned long cr3,
unsigned long addr);
/*
* interactively call pervasive debugger from a privileged domain
*/
void pdb_do_debug (dom0_op_t *op)
{
op->u.debug.status = 0;
TRC(printk("PDB: op:%c, dom:%llu, in1:%x, in2:%x, in3:%x, in4:%x\n",
op->u.debug.opcode, op->u.debug.domain,
op->u.debug.in1, op->u.debug.in2,
op->u.debug.in3, op->u.debug.in4));
/* NOT NOW
if (op->u.debug.domain == 0)
{
op->u.debug.status = 1;
return;
}
*/
switch (op->u.debug.opcode)
{
case 'c' :
{
struct domain *d = find_domain_by_id(op->u.debug.domain);
if ( d != NULL )
{
domain_unpause_by_systemcontroller(d);
put_domain(d);
}
else
{
op->u.debug.status = 2; /* invalid domain */
}
break;
}
case 'r' :
{
int loop;
u_char x;
unsigned long cr3;
struct domain *d;
d = find_domain_by_id(op->u.debug.domain);
if ( shadow_mode(d) )
cr3 = pagetable_val(d->mm.shadow_table);
else
cr3 = pagetable_val(d->mm.pagetable);
for (loop = 0; loop < op->u.debug.in2; loop++) /* length */
{
if (loop % 8 == 0)
{
printk ("\n%08x ", op->u.debug.in1 + loop);
}
x = pdb_linux_get_value(op->u.debug.in3,
cr3, op->u.debug.in1 + loop);
printk (" %02x", x);
}
printk ("\n");
put_domain(d);
break;
}
case 's' :
{
struct domain *d = find_domain_by_id(op->u.debug.domain);
if ( d != NULL )
{
domain_pause_by_systemcontroller(d);
put_domain(d);
}
else
{
op->u.debug.status = 2; /* invalid domain */
}
break;
}
default :
{
printk("PDB error: unknown debug opcode %c (0x%x)\n",
op->u.debug.opcode, op->u.debug.opcode);
}
}
}
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