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/*
* pervasive debugger
* www.cl.cam.ac.uk/netos/pdb
*
* alex ho
* 2004
* university of cambridge computer laboratory
*/
#ifndef __PDB_H__
#define __PDB_H__
#include <asm/ptrace.h>
#include <xen/list.h>
#include <hypervisor-ifs/dom0_ops.h>
#include <hypervisor-ifs/hypervisor-if.h> /* for domain id */
extern int pdb_initialized;
extern int pdb_com_port;
extern int pdb_high_bit;
extern int pdb_page_fault_possible;
extern int pdb_page_fault_scratch;
extern int pdb_page_fault;
extern void initialize_pdb(void);
/* Get/set values from generic debug interface. */
extern int pdb_set_values(u_char *buffer, int length,
unsigned long cr3, unsigned long addr);
extern int pdb_get_values(u_char *buffer, int length,
unsigned long cr3, unsigned long addr);
/* External entry points. */
extern int pdb_handle_exception(int exceptionVector,
struct pt_regs *xen_regs);
extern void pdb_do_debug(dom0_op_t *op);
/* PDB Context. */
struct pdb_context
{
int valid;
int domain;
int process;
int system_call; /* 0x01 break on enter, 0x02 break on exit */
unsigned long ptbr;
};
extern struct pdb_context pdb_ctx;
/* Breakpoints. */
struct pdb_breakpoint
{
struct list_head list;
unsigned long address;
unsigned long cr3;
domid_t domain;
};
extern void pdb_bkpt_add (unsigned long cr3, unsigned long address);
extern struct pdb_breakpoint* pdb_bkpt_search (unsigned long cr3,
unsigned long address);
extern int pdb_bkpt_remove (unsigned long cr3, unsigned long address);
/* Conversions. */
extern int hex (char);
extern char *mem2hex (char *, char *, int);
extern char *hex2mem (char *, char *, int);
extern int hexToInt (char **ptr, int *intValue);
/* Temporary Linux specific definitions */
extern int pdb_system_call;
extern unsigned char pdb_system_call_enter_instr; /* original enter instr */
extern unsigned char pdb_system_call_leave_instr; /* original next instr */
extern unsigned long pdb_system_call_next_addr; /* instr after int 0x80 */
extern unsigned long pdb_system_call_eflags_addr; /* saved eflags on stack */
unsigned long pdb_linux_pid_ptbr (unsigned long cr3, int pid);
void pdb_linux_get_values(char *buffer, int length, unsigned long address,
int pid, unsigned long cr3);
void pdb_linux_set_values(char *buffer, int length, unsigned long address,
int pid, unsigned long cr3);
void pdb_linux_syscall_enter_bkpt (struct pt_regs *regs, long error_code,
trap_info_t *ti);
void pdb_linux_syscall_exit_bkpt (struct pt_regs *regs,
struct pdb_context *pdb_ctx);
#endif /* __PDB_H__ */
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