/* $OpenBSD: kgdb_machdep.c,v 1.8 2005/11/13 17:50:45 fgsch Exp $ */
/* $NetBSD: kgdb_machdep.c,v 1.1 1997/08/31 21:22:45 pk Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1995
* The President and Fellows of Harvard College. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* This product includes software developed by Harvard University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kgdb_stub.c 8.1 (Berkeley) 6/11/93
*/
/*
* Machine dependent routines needed by kern/kgdb_stub.c
*/
#ifdef KGDB
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kgdb.h>
#include <uvm/uvm_extern.h>
#include <machine/ctlreg.h>
#include <machine/psl.h>
#include <machine/reg.h>
#include <machine/trap.h>
#include <machine/cpu.h>
#include <sparc/sparc/asm.h>
#if defined(SUN4M)
#define getpte4m(va) \
lda(((vaddr_t)va & 0xFFFFF000) | ASI_SRMMUFP_L3, ASI_SRMMUFP)
#endif
#if defined(SUN4) || defined(SUN4C)
#define getpte4(va) lda(va, ASI_PTE)
#define setpte4(va, pte) sta(va, ASI_PTE, pte)
#endif
static __inline void kgdb_copy(char *, char *, int);
static __inline void kgdb_zero(char *, int);
/*
* This little routine exists simply so that bcopy() can be debugged.
*/
static __inline void
kgdb_copy(src, dst, len)
register char *src, *dst;
register int len;
{
while (--len >= 0)
*dst++ = *src++;
}
/* ditto for bzero */
static __inline void
kgdb_zero(ptr, len)
register char *ptr;
register int len;
{
while (--len >= 0)
*ptr++ = (char) 0;
}
/*
* Translate a trap number into a unix compatible signal value.
* (gdb only understands unix signal numbers).
* XXX should this be done at the other end?
*/
int
kgdb_signal(type)
int type;
{
int sigval;
switch (type) {
case T_AST:
sigval = SIGINT;
break;
case T_TEXTFAULT:
case T_DATAFAULT:
sigval = SIGSEGV;
break;
case T_ALIGN:
sigval = SIGBUS;
break;
case T_ILLINST:
case T_PRIVINST:
case T_DIV0:
sigval = SIGILL;
break;
case T_FPE:
sigval = SIGFPE;
break;
case T_BREAKPOINT:
sigval = SIGTRAP;
break;
case T_KGDB_EXEC:
sigval = SIGIOT;
break;
default:
sigval = SIGEMT;
break;
}
return (sigval);
}
/*
* Definitions exported from gdb (& then made prettier).
*/
#define GDB_G0 0
#define GDB_O0 8
#define GDB_L0 16
#define GDB_I0 24
#define GDB_FP0 32
#define GDB_Y 64
#define GDB_PSR 65
#define GDB_WIM 66
#define GDB_TBR 67
#define GDB_PC 68
#define GDB_NPC 69
#define GDB_FSR 70
#define GDB_CSR 71
#define REGISTER_BYTES (KGDB_NUMREGS * 4)
#define REGISTER_BYTE(n) ((n) * 4)
/*
* Translate the values stored in the kernel regs struct to the format
* understood by gdb.
*/
void
kgdb_getregs(regs, gdb_regs)
db_regs_t *regs;
kgdb_reg_t *gdb_regs;
{
struct trapframe *tf = ®s->db_tf;
/* %g0..%g7 and %o0..%o7: from trapframe */
gdb_regs[0] = 0;
kgdb_copy((caddr_t)&tf->tf_global[1], (caddr_t)&gdb_regs[1], 15 * 4);
/* %l0..%l7 and %i0..%i7: from stack */
kgdb_copy((caddr_t)tf->tf_out[6], (caddr_t)&gdb_regs[GDB_L0], 16 * 4);
/* %f0..%f31 -- fake, kernel does not use FP */
kgdb_zero((caddr_t)&gdb_regs[GDB_FP0], 32 * 4);
/* %y, %psr, %wim, %tbr, %pc, %npc, %fsr, %csr */
gdb_regs[GDB_Y] = tf->tf_y;
gdb_regs[GDB_PSR] = tf->tf_psr;
gdb_regs[GDB_WIM] = tf->tf_global[0]; /* input only! */
gdb_regs[GDB_TBR] = 0; /* fake */
gdb_regs[GDB_PC] = tf->tf_pc;
gdb_regs[GDB_NPC] = tf->tf_npc;
gdb_regs[GDB_FSR] = 0; /* fake */
gdb_regs[GDB_CSR] = 0; /* fake */
}
/*
* Reverse the above.
*/
void
kgdb_setregs(regs, gdb_regs)
db_regs_t *regs;
kgdb_reg_t *gdb_regs;
{
struct trapframe *tf = ®s->db_tf;
kgdb_copy((caddr_t)&gdb_regs[1], (caddr_t)&tf->tf_global[1], 15 * 4);
kgdb_copy((caddr_t)&gdb_regs[GDB_L0], (caddr_t)tf->tf_out[6], 16 * 4);
tf->tf_y = gdb_regs[GDB_Y];
tf->tf_psr = gdb_regs[GDB_PSR];
tf->tf_pc = gdb_regs[GDB_PC];
tf->tf_npc = gdb_regs[GDB_NPC];
}
/*
* Determine if memory at [va..(va+len)] is valid.
*/
int
kgdb_acc(vaddr_t va, size_t len)
{
int pte;
vaddr_t eva;
eva = round_page(va + len);
va = trunc_page(va);
/* XXX icky: valid address but causes timeout */
if (va >= (vaddr_t)0xfffff000)
return (0);
for (; va < eva; va += NBPG) {
#if defined(SUN4M)
if (CPU_ISSUN4M) {
pte = getpte4m(va);
if ((pte & SRMMU_TETYPE) != SRMMU_TEPTE)
return (0);
}
#endif
#if defined(SUN4) || defined(SUN4C)
if (CPU_ISSUN4C || CPU_ISSUN4) {
pte = getpte4(va);
if ((pte & PG_V) == 0)
return (0);
}
#endif
}
return (1);
}
#endif
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