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/* $OpenBSD: db_interface.c,v 1.1 2001/06/26 21:57:39 smurph Exp $ */
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <machine/db_machdep.h>
#include <machine/frame.h>
#include <ddb/db_sym.h>
#include <ddb/db_command.h>
#include <ddb/db_extern.h>
#include <ddb/db_access.h>
#include <ddb/db_output.h>
extern label_t *db_recover;
void ddb_trap __P((void)); /* Call into trap_subr.S */
int ddb_trap_glue __P((struct trapframe *)); /* Called from trap_subr.S */
void
Debugger()
{
#ifdef DDB
ddb_trap();
#else
mvmeprom_retunr();
#endif
}
int
ddb_trap_glue(frame)
struct trapframe *frame;
{
if (!(frame->srr1 & PSL_PR)
&& (frame->exc == EXC_TRC
|| (frame->exc == EXC_PGM
&& (frame->srr1 & 0x20000))
|| frame->exc == EXC_BPT)) {
bcopy(frame->fixreg, DDB_REGS->r, 32 * sizeof(u_int32_t));
DDB_REGS->iar = frame->srr0;
DDB_REGS->msr = frame->srr1;
db_trap(T_BREAKPOINT, 0);
bcopy(DDB_REGS->r, frame->fixreg, 32 * sizeof(u_int32_t));
return 1;
}
return 0;
}
struct db_command db_machine_cmds[] =
{
{(char *) 0,}
};
void
kdb_init()
{
#ifdef DB_MACHINE_COMMANDS
db_machine_commands_install(db_machine_cmds);
#endif
ddb_init();
db_printf("ddb enabled\n");
}
int
kdb_trap(type, v)
int type;
void *v;
{
struct trapframe *frame = v;
switch (type) {
case T_BREAKPOINT:
case -1:
break;
default:
if (db_recover != 0) {
db_error("Faulted in DDB; continuing...\n");
/*NOTREACHED*/
}
}
/* XXX Should switch to kdb's own stack here. */
bcopy(frame->fixreg, DDB_REGS->r, 32 * sizeof(u_int32_t));
DDB_REGS->iar = frame->srr0;
DDB_REGS->msr = frame->srr1;
db_trap(T_BREAKPOINT, 0);
bcopy(DDB_REGS->r, frame->fixreg, 32 * sizeof(u_int32_t));
frame->srr0 = DDB_REGS->iar;
frame->srr1 = DDB_REGS->msr;
return 1;
}
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