Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add KGDB support

This commit is contained in:
gwr 1996-06-15 14:34:32 +00:00
parent 6f359b538f
commit 75a1ca034a
5 changed files with 1100 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

166
sys/arch/sun3/conf/GENERIC_KGDB Normal file
View File

@ -0,0 +1,166 @@
# $NetBSD: GENERIC_KGDB,v 1.1 1996/06/15 14:34:32 gwr Exp $
#
# GENERIC Sun3 (3/50, 3/60, 3/110, 3/160, 3/260)
# Supports root on: ie0, le0, sd*, ...
#
include "std.sun3"
# Machines to be supported by this kernel
options GENERIC
options FPU_EMULATE
options HAVECACHE # Sun3/260 VAC
# Needs to be set per system. i.e change these as you see fit
maxusers 4
# Standard system options
options SWAPPAGER, VNODEPAGER, DEVPAGER # paging
options KTRACE # system call tracing support
makeoptions DEBUG="-g" # symbols for kgdb + nm
options KGDB
# Filesystem options
options NFSSERVER # nfs server support
options NFSCLIENT # nfs client support
options FFS # ufs file system
#
options CD9660 # ISO 9660 + Rock Ridge file system
options FDESC # /dev/fd/*
options FIFO # FIFOs; RECOMMENDED
options KERNFS # /kern
options NULLFS # loopback file system
options PROCFS # /proc
options UNION # union file system
# Networking options
options INET # IP prototol stack support
# XXX - Work-around for root on slow SunOS/Sun3 servers (sigh...)
options NFS_BOOT_RWSIZE=1024
options LANCE_REVC_BUG # Sun3 machines have the old, buggy LANCE
# Compatability options
options COMPAT_SUNOS # can run SunOS 4.1.1 executables
#options COMPAT_09 # NetBSD 0.9,
options COMPAT_10 # NetBSD 1.0,
options COMPAT_11 # NetBSD 1.1,
options COMPAT_43 # and 4.3BSD
options TCP_COMPAT_42 # TCP bug compatibility with 4.2BSD
options UCONSOLE # Allow non-root TIOCCONS
# Sun3-specific debugging options
options PMAP_DEBUG
#options VMFAULT_TRACE
#options SYSCALL_DEBUG
#options EXEC_DEBUG
options DIAGNOSTIC
#options SCSIDEBUG
options NCR5380_DEBUG
config netbsd swap generic
#
# Serial ports
#
zstty0 at zsc1 channel 0 # ttya
zstty1 at zsc1 channel 1 # ttyb
kbd0 at zsc0 channel 0 # keyboard
ms0 at zsc0 channel 1 # mouse
#
# Network devices
#
# Intel Ethernet (onboard, or VME)
ie0 at obio0 addr ? level ?
ie1 at vmes0 addr 0xffe88000 level 3 vect 0x75
# Lance Ethernet (only onboard)
le0 at obio0 addr ? level ?
#
# Disk and tape devices
#
# Sun3 "si" SCSI controller (NCR 5380)
si0 at obio0 addr ? level ?
si0 at vmes0 addr 0xff200000 level 2 vect 0x40
si1 at vmes0 addr 0xff204000 level 2 vect 0x41
# Xylogics 7053 controllers
# xdc0 at vmel0 addr 0xffffee80 level 2 vect 0x44
# xdc1 at vmel0 addr 0xffffee90 level 2 vect 0x45
# xd* at xdc? drive ?
# Xylogics 450/451 controllers
# xyc0 at vmes0 addr 0xffffee40 level 2 vect 0x48
# xyc1 at vmes0 addr 0xffffee48 level 2 vect 0x49
# xy* at xyc? drive ?
# Xylogics 472 tape controllers?
#
# Frame buffer devices
#
# The default cgfour address depends on the machine:
# 3/60: obmem 0xFF200000 .. 0xFF9fffff
# 3/110: different? (not tested)
cgfour0 at obmem0 addr ?
# 3/60 P4 accelerated 8-bit color frame buffer
# cgsix0 at obmem0 addr ?
# 3/60 P4 24-bit color frame buffer
# cgeight0 at obmem0 addr ?
# The default bwtwo address depends on the machine:
# 3/50: obmem 0x100000
# else: obmem 0xff000000
bwtwo0 at obmem0 addr ?
# 3/60 P4 color frame buffer overlay plane, or P4 monochrome frame buffer
#bwtwo1 at obmem0 addr 0xff300000
# 3/60 plug-in color frame buffer overlay plane
#bwtwo1 at obmem0 addr 0xff400000
# Sun-3 color board, or CG5 8-bit VME frame buffer.
cgtwo0 at vmes0 addr 0xff400000 level 4 vect 0xA8
# Support for the CG9 24-bit VME frame buffer.
# cgnine0 at vmel0 addr 0x08000000
#
# SCSI infrastructure
#
scsibus* at scsi?
# Sun compatible scsi device mappings
sd0 at scsibus? target 0 lun 0
sd1 at scsibus? target 0 lun 1
sd2 at scsibus? target 1 lun 0
sd3 at scsibus? target 1 lun 1
sd* at scsibus? target ? lun ?
st0 at scsibus? target 4 lun 0
st1 at scsibus? target 5 lun 0
st* at scsibus? target ? lun ?
cd0 at scsibus? target 6 lun 0
cd* at scsibus? target ? lun ?
#ch* at scsibus? target ? lun ?
# RAM-disk drivers
pseudo-device rd 2
# Misc.
pseudo-device loop 1 # network loopback
pseudo-device bpfilter 8 # packet filter
pseudo-device sl 2 # CSLIP
pseudo-device ppp 2 # PPP
pseudo-device tun 2 # network tunneling over tty
pseudo-device pty 64 # pseudo-terminals
#pseudo-device vnd 4 # paging to files

166
sys/arch/sun3/conf/KGDB Normal file
View File

@ -0,0 +1,166 @@
# $NetBSD: KGDB,v 1.1 1996/06/15 14:34:32 gwr Exp $
#
# GENERIC Sun3 (3/50, 3/60, 3/110, 3/160, 3/260)
# Supports root on: ie0, le0, sd*, ...
#
include "std.sun3"
# Machines to be supported by this kernel
options GENERIC
options FPU_EMULATE
options HAVECACHE # Sun3/260 VAC
# Needs to be set per system. i.e change these as you see fit
maxusers 4
# Standard system options
options SWAPPAGER, VNODEPAGER, DEVPAGER # paging
options KTRACE # system call tracing support
makeoptions DEBUG="-g" # symbols for kgdb + nm
options KGDB
# Filesystem options
options NFSSERVER # nfs server support
options NFSCLIENT # nfs client support
options FFS # ufs file system
#
options CD9660 # ISO 9660 + Rock Ridge file system
options FDESC # /dev/fd/*
options FIFO # FIFOs; RECOMMENDED
options KERNFS # /kern
options NULLFS # loopback file system
options PROCFS # /proc
options UNION # union file system
# Networking options
options INET # IP prototol stack support
# XXX - Work-around for root on slow SunOS/Sun3 servers (sigh...)
options NFS_BOOT_RWSIZE=1024
options LANCE_REVC_BUG # Sun3 machines have the old, buggy LANCE
# Compatability options
options COMPAT_SUNOS # can run SunOS 4.1.1 executables
#options COMPAT_09 # NetBSD 0.9,
options COMPAT_10 # NetBSD 1.0,
options COMPAT_11 # NetBSD 1.1,
options COMPAT_43 # and 4.3BSD
options TCP_COMPAT_42 # TCP bug compatibility with 4.2BSD
options UCONSOLE # Allow non-root TIOCCONS
# Sun3-specific debugging options
options PMAP_DEBUG
#options VMFAULT_TRACE
#options SYSCALL_DEBUG
#options EXEC_DEBUG
options DIAGNOSTIC
#options SCSIDEBUG
options NCR5380_DEBUG
config netbsd swap generic
#
# Serial ports
#
zstty0 at zsc1 channel 0 # ttya
zstty1 at zsc1 channel 1 # ttyb
kbd0 at zsc0 channel 0 # keyboard
ms0 at zsc0 channel 1 # mouse
#
# Network devices
#
# Intel Ethernet (onboard, or VME)
ie0 at obio0 addr ? level ?
ie1 at vmes0 addr 0xffe88000 level 3 vect 0x75
# Lance Ethernet (only onboard)
le0 at obio0 addr ? level ?
#
# Disk and tape devices
#
# Sun3 "si" SCSI controller (NCR 5380)
si0 at obio0 addr ? level ?
si0 at vmes0 addr 0xff200000 level 2 vect 0x40
si1 at vmes0 addr 0xff204000 level 2 vect 0x41
# Xylogics 7053 controllers
# xdc0 at vmel0 addr 0xffffee80 level 2 vect 0x44
# xdc1 at vmel0 addr 0xffffee90 level 2 vect 0x45
# xd* at xdc? drive ?
# Xylogics 450/451 controllers
# xyc0 at vmes0 addr 0xffffee40 level 2 vect 0x48
# xyc1 at vmes0 addr 0xffffee48 level 2 vect 0x49
# xy* at xyc? drive ?
# Xylogics 472 tape controllers?
#
# Frame buffer devices
#
# The default cgfour address depends on the machine:
# 3/60: obmem 0xFF200000 .. 0xFF9fffff
# 3/110: different? (not tested)
cgfour0 at obmem0 addr ?
# 3/60 P4 accelerated 8-bit color frame buffer
# cgsix0 at obmem0 addr ?
# 3/60 P4 24-bit color frame buffer
# cgeight0 at obmem0 addr ?
# The default bwtwo address depends on the machine:
# 3/50: obmem 0x100000
# else: obmem 0xff000000
bwtwo0 at obmem0 addr ?
# 3/60 P4 color frame buffer overlay plane, or P4 monochrome frame buffer
#bwtwo1 at obmem0 addr 0xff300000
# 3/60 plug-in color frame buffer overlay plane
#bwtwo1 at obmem0 addr 0xff400000
# Sun-3 color board, or CG5 8-bit VME frame buffer.
cgtwo0 at vmes0 addr 0xff400000 level 4 vect 0xA8
# Support for the CG9 24-bit VME frame buffer.
# cgnine0 at vmel0 addr 0x08000000
#
# SCSI infrastructure
#
scsibus* at scsi?
# Sun compatible scsi device mappings
sd0 at scsibus? target 0 lun 0
sd1 at scsibus? target 0 lun 1
sd2 at scsibus? target 1 lun 0
sd3 at scsibus? target 1 lun 1
sd* at scsibus? target ? lun ?
st0 at scsibus? target 4 lun 0
st1 at scsibus? target 5 lun 0
st* at scsibus? target ? lun ?
cd0 at scsibus? target 6 lun 0
cd* at scsibus? target ? lun ?
#ch* at scsibus? target ? lun ?
# RAM-disk drivers
pseudo-device rd 2
# Misc.
pseudo-device loop 1 # network loopback
pseudo-device bpfilter 8 # packet filter
pseudo-device sl 2 # CSLIP
pseudo-device ppp 2 # PPP
pseudo-device tun 2 # network tunneling over tty
pseudo-device pty 64 # pseudo-terminals
#pseudo-device vnd 4 # paging to files

68
sys/arch/sun3/include/remote-sl.h Normal file
View File

@ -0,0 +1,68 @@
/* $NetBSD: remote-sl.h,v 1.1 1996/06/15 14:34:35 gwr Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. 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 acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)remote-sl.h 8.1 (Berkeley) 6/11/93
*/
/*
* These definitions are factored out into an include file so
* the kernel stub has access to them.
*/
#define FRAME_START 0xc1 /* Frame End */
#define FRAME_END 0xc0 /* Frame End */
#define FRAME_ESCAPE 0xdb /* Frame Esc */
#define TRANS_FRAME_START 0xde /* transposed frame start */
#define TRANS_FRAME_END 0xdc /* transposed frame esc */
#define TRANS_FRAME_ESCAPE 0xdd /* transposed frame esc */
/*
* Message limits. SL_MAXDATA is the maximum number of bytes that can
* be read or written. SL_BUFSIZE is the maximum amount of data that
* can be passed across the serial link. The actual MTU is two times
* the max message (since each byte might be escaped), plus the two
* framing bytes. We add two to the message length to account for the
* type byte and checksum.
*/
#define SL_MAXDATA 62 /* max data that can be read */
#define SL_RPCSIZE (1 + SL_MAXDATA) /* errno byte + data */
#define SL_MTU ((2 * (SL_RPCSIZE + 2) + 2))

74
sys/arch/sun3/sun3/kgdb_proto.h Normal file
View File

@ -0,0 +1,74 @@
/* $NetBSD: kgdb_proto.h,v 1.1 1996/06/15 14:34:37 gwr Exp $ */
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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_proto.h 8.1 (Berkeley) 6/11/93
*/
/*
* Message types.
*/
#define KGDB_MEM_R 0x01
#define KGDB_MEM_W 0x02
#define KGDB_REG_R 0x03
#define KGDB_REG_W 0x04
#define KGDB_CONT 0x05
#define KGDB_STEP 0x06
#define KGDB_KILL 0x07
#define KGDB_SIGNAL 0x08
#define KGDB_EXEC 0x09
#define KGDB_HALT 0x0a
#define KGDB_BOOT 0x0b
#define KGDB_CMD(x) ((x) & 0x0f)
/*
* Message flags.
*/
#define KGDB_ACK 0x80
#define KGDB_DELTA 0x40
#define KGDB_MORE 0x20
#define KGDB_SEQ 0x10

626
sys/arch/sun3/sun3/kgdb_stub.c Normal file
View File

@ -0,0 +1,626 @@
/* $NetBSD: kgdb_stub.c,v 1.1 1996/06/15 14:34:38 gwr Exp $ */
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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 acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratories.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. 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 8.4 (Berkeley) 1/12/94
*/
/*
* "Stub" to allow remote cpu to debug over a serial line using gdb.
*/
#ifdef KGDB
#include <sys/param.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <machine/control.h>
#include <machine/cpu.h>
#include <machine/frame.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/reg.h>
#include <machine/trap.h>
#include <sun3/sun3/kgdb_proto.h>
#include <machine/remote-sl.h>
/* These are in db_memrw.c */
extern void db_read_bytes __P((vm_offset_t addr, size_t size, char *data));
extern void db_write_bytes __P((vm_offset_t addr, size_t size, char *data));
#ifndef KGDBDEV
#define KGDBDEV -1
#endif
#ifndef KGDBRATE
#define KGDBRATE 19200
#endif
int kgdb_dev = KGDBDEV; /* remote debugging device (-1 if none) */
int kgdb_rate = KGDBRATE; /* remote debugging baud rate */
int kgdb_active = 0; /* remote debugging active if != 0 */
int kgdb_debug_init = 0; /* != 0 waits for remote at system init */
int kgdb_debug_panic = 0; /* != 0 waits for remote on panic */
static void kgdb_send __P((u_int, u_char *, int));
static int kgdb_recv __P((u_char *, int *));
static int computeSignal __P((int));
int kgdb_trap __P((int, struct trapframe *));
int kgdb_acc __P((caddr_t, int));
static int (*kgdb_getc) __P((void *));
static void (*kgdb_putc) __P((void *, int));
static void *kgdb_ioarg;
#define GETC() ((*kgdb_getc)(kgdb_ioarg))
#define PUTC(c) ((*kgdb_putc)(kgdb_ioarg, c))
#define PUTESC(c) do { \
if (c == FRAME_END) { \
PUTC(FRAME_ESCAPE); \
c = TRANS_FRAME_END; \
} else if (c == FRAME_ESCAPE) { \
PUTC(FRAME_ESCAPE); \
c = TRANS_FRAME_ESCAPE; \
} else if (c == FRAME_START) { \
PUTC(FRAME_ESCAPE); \
c = TRANS_FRAME_START; \
} \
PUTC(c); \
} while (0)
/*
* This is called by the approprite tty driver.
* In our case, by dev/zs_kgdb.c:zs_kgdb_init()
*/
void
kgdb_attach(getfn, putfn, ioarg)
int (*getfn) __P((void *));
void (*putfn) __P((void *, int));
void *ioarg;
{
kgdb_getc = getfn;
kgdb_putc = putfn;
kgdb_ioarg = ioarg;
}
/*
* Send a message. The host gets one chance to read it.
*/
static void
kgdb_send(type, bp, len)
register u_int type;
register u_char *bp;
register int len;
{
register u_char csum;
register u_char *ep = bp + len;
PUTC(FRAME_START);
PUTESC(type);
csum = type;
while (bp < ep) {
type = *bp++;
csum += type;
PUTESC(type);
}
csum = -csum;
PUTESC(csum);
PUTC(FRAME_END);
}
static int
kgdb_recv(bp, lenp)
u_char *bp;
int *lenp;
{
register u_char c, csum;
register int escape, len;
register int type;
restart:
csum = len = escape = 0;
type = -1;
while (1) {
c = GETC();
switch (c) {
case FRAME_ESCAPE:
escape = 1;
continue;
case TRANS_FRAME_ESCAPE:
if (escape)
c = FRAME_ESCAPE;
break;
case TRANS_FRAME_END:
if (escape)
c = FRAME_END;
break;
case TRANS_FRAME_START:
if (escape)
c = FRAME_START;
break;
case FRAME_START:
goto restart;
case FRAME_END:
if (type < 0 || --len < 0) {
csum = len = escape = 0;
type = -1;
continue;
}
if (csum != 0)
return (0);
*lenp = len;
return (type);
}
csum += c;
if (type < 0) {
type = c;
escape = 0;
continue;
}
if (++len > SL_RPCSIZE) {
while (GETC() != FRAME_END)
continue;
return (0);
}
*bp++ = c;
escape = 0;
}
}
/*
* Translate a trap number into a unix compatible signal value.
* (gdb only understands unix signal numbers).
*/
static int
computeSignal(type)
int type;
{
int sigval;
switch (type) {
case T_BUSERR:
sigval = SIGBUS;
break;
case T_ADDRERR:
sigval = SIGBUS;
break;
case T_ILLINST:
sigval = SIGILL;
break;
case T_ZERODIV:
sigval = SIGFPE;
break;
case T_CHKINST:
sigval = SIGFPE;
break;
case T_TRAPVINST:
sigval = SIGFPE;
break;
case T_PRIVINST:
sigval = SIGILL;
break;
case T_TRACE:
sigval = SIGTRAP;
break;
case T_MMUFLT:
sigval = SIGSEGV;
break;
case T_SSIR:
sigval = SIGSEGV;
break;
case T_FMTERR:
sigval = SIGILL;
break;
case T_FPERR:
sigval = SIGFPE;
break;
case T_COPERR:
sigval = SIGFPE;
break;
case T_ASTFLT:
sigval = SIGINT;
break;
case T_TRAP15:
sigval = SIGTRAP;
break;
default:
sigval = SIGEMT;
break;
}
return (sigval);
}
/*
* Trap into kgdb to wait for debugger to connect,
* noting on the console why nothing else is going on.
*/
void
kgdb_connect(verbose)
int verbose;
{
if (kgdb_dev < 0 || kgdb_getc == NULL)
return;
fb_unblank();
if (verbose)
printf("kgdb waiting...");
Debugger(); /* XXX: trap into kgdb */
if (verbose)
printf("connected.\n");
}
/*
* Decide what to do on panic.
* (This is called by panic, like Debugger())
*/
void
kgdb_panic()
{
if (kgdb_dev >= 0 && kgdb_getc != NULL &&
kgdb_active == 0 && kgdb_debug_panic)
{
/* XXX: Just call Debugger() instead? */
kgdb_connect(1);
}
}
/*
* Definitions exported from gdb.
*/
#define NUM_REGS 18
#define REGISTER_BYTES (NUM_REGS * 4)
#define REGISTER_BYTE(n) ((n) * 4)
#define GDB_SR 16
#define GDB_PC 17
/*
* This little routine exists simply so that bcopy() can be debugged.
*/
static void
kgdb_copy(vsrc, vdst, len)
void *vsrc, *vdst;
register int len;
{
register char *src = vsrc;
register char *dst = vdst;
while (--len >= 0)
*dst++ = *src++;
}
/* ditto for bzero */
static void
kgdb_zero(vptr, len)
void *vptr;
register int len;
{
register char *ptr = vptr;
while (--len >= 0)
*ptr++ = (char) 0;
}
/*
* Translate the values stored in the kernel regs struct to the format
* understood by gdb.
*
* There is a short pad word between SP (A7) and SR which keeps the
* kernel stack long word aligned (note that this is in addition to
* the stack adjust short that we treat as the upper half of a longword
* SR). We must skip this when copying into and out of gdb.
*/
static void
regs_to_gdb(tf, gdb_regs)
struct trapframe *tf;
u_long *gdb_regs;
{
kgdb_copy(tf->tf_regs, gdb_regs, 16*4);
gdb_regs[GDB_SR] = tf->tf_sr;
gdb_regs[GDB_PC] = tf->tf_pc;
}
/*
* Reverse the above.
*/
static void
gdb_to_regs(tf, gdb_regs)
struct trapframe *tf;
u_long *gdb_regs;
{
kgdb_copy(gdb_regs, tf->tf_regs, 16*4);
tf->tf_sr = gdb_regs[GDB_SR];
tf->tf_pc = gdb_regs[GDB_PC];
}
static u_long reg_cache[NUM_REGS];
static u_char inbuffer[SL_RPCSIZE];
static u_char outbuffer[SL_RPCSIZE];
/*
* This function does all command procesing for interfacing to
* a remote gdb.
*/
int
kgdb_trap(type, tf)
int type;
struct trapframe *tf;
{
register u_long len;
caddr_t addr;
register u_char *cp;
register u_char out, in;
register int outlen;
int inlen;
u_long gdb_regs[NUM_REGS];
if (kgdb_dev < 0 || kgdb_getc == NULL) {
/* not debugging */
return (0);
}
if (kgdb_active == 0) {
if (type != T_BREAKPOINT) {
/* No debugger active -- let trap handle this. */
return (0);
}
/*
* If the packet that woke us up isn't an exec packet,
* ignore it since there is no active debugger. Also,
* we check that it's not an ack to be sure that the
* remote side doesn't send back a response after the
* local gdb has exited. Otherwise, the local host
* could trap into gdb if it's running a gdb kernel too.
*/
in = GETC();
/*
* If we came in asynchronously through the serial line,
* the framing character is eaten by the receive interrupt,
* but if we come in through a synchronous trap (i.e., via
* kgdb_connect()), we will see the extra character.
*/
if (in == FRAME_START)
in = GETC();
/*
* Check that this is a debugger exec message. If so,
* slurp up the entire message then ack it, and fall
* through to the recv loop.
*/
if (KGDB_CMD(in) != KGDB_EXEC || (in & KGDB_ACK) != 0)
return (0);
while (GETC() != FRAME_END)
continue;
/*
* Do the printf *before* we ack the message. This way
* we won't drop any inbound characters while we're
* doing the polling printf.
*/
printf("kgdb started from device %x\n", kgdb_dev);
kgdb_send(in | KGDB_ACK, (u_char *)0, 0);
kgdb_active = 1;
}
/*
* Stick frame regs into our reg cache then tell remote host
* that an exception has occured.
*/
regs_to_gdb(tf, gdb_regs);
if (type != T_BREAKPOINT) {
/*
* XXX - Which is right? The code or the comment? -gwr
* Only send an asynchronous SIGNAL message when we hit
* a breakpoint. Otherwise, we will drop the incoming
* packet while we output this one (and on entry the other
* side isn't interested in the SIGNAL type -- if it is,
* it will have used a signal packet.)
*/
outbuffer[0] = computeSignal(type);
kgdb_send(KGDB_SIGNAL, outbuffer, 1);
}
for (;;) {
in = kgdb_recv(inbuffer, &inlen);
if (in == 0 || (in & KGDB_ACK))
/* Ignore inbound acks and error conditions. */
continue;
out = in | KGDB_ACK;
switch (KGDB_CMD(in)) {
case KGDB_SIGNAL:
/*
* if this command came from a running gdb,
* answer it -- the other guy has no way of
* knowing if we're in or out of this loop
* when he issues a "remote-signal". (Note
* that without the length check, we could
* loop here forever if the output line is
* looped back or the remote host is echoing.)
*/
if (inlen == 0) {
outbuffer[0] = computeSignal(type);
kgdb_send(KGDB_SIGNAL, outbuffer, 1);
}
continue;
case KGDB_REG_R:
case KGDB_REG_R | KGDB_DELTA:
cp = outbuffer;
outlen = 0;
for (len = inbuffer[0]; len < NUM_REGS; ++len) {
if (reg_cache[len] != gdb_regs[len] ||
(in & KGDB_DELTA) == 0) {
if (outlen + 5 > SL_MAXDATA) {
out |= KGDB_MORE;
break;
}
cp[outlen] = len;
kgdb_copy(&gdb_regs[len],
&cp[outlen + 1], 4);
reg_cache[len] = gdb_regs[len];
outlen += 5;
}
}
break;
case KGDB_REG_W:
case KGDB_REG_W | KGDB_DELTA:
cp = inbuffer;
for (len = 0; len < inlen; len += 5) {
register int j = cp[len];
kgdb_copy(&cp[len + 1],
&gdb_regs[j], 4);
reg_cache[j] = gdb_regs[j];
}
gdb_to_regs(tf, gdb_regs);
outlen = 0;
break;
case KGDB_MEM_R:
len = inbuffer[0];
kgdb_copy(&inbuffer[1], &addr, 4);
if (len > SL_MAXDATA) {
outlen = 1;
outbuffer[0] = E2BIG;
} else if (!kgdb_acc(addr, len)) {
outlen = 1;
outbuffer[0] = EFAULT;
} else {
outlen = len + 1;
outbuffer[0] = 0;
db_read_bytes((vm_offset_t)addr, (size_t)len,
(char *)&outbuffer[1]);
}
break;
case KGDB_MEM_W:
len = inlen - 4;
kgdb_copy(inbuffer, &addr, 4);
outlen = 1;
if (!kgdb_acc(addr, len))
outbuffer[0] = EFAULT;
else {
outbuffer[0] = 0;
db_write_bytes((vm_offset_t)addr, (size_t)len,
(char *)&inbuffer[4]);
}
break;
case KGDB_KILL:
kgdb_active = 0;
printf("kgdb detached\n");
/* FALLTHROUGH */
case KGDB_CONT:
kgdb_send(out, 0, 0);
tf->tf_sr &=~ PSL_T;
goto out;
case KGDB_STEP:
kgdb_send(out, 0, 0);
tf->tf_sr |= PSL_T;
goto out;
case KGDB_HALT:
kgdb_send(out, 0, 0);
sun3_mon_halt();
/* NOTREACHED */
case KGDB_BOOT:
kgdb_send(out, 0, 0);
sun3_mon_reboot("");
/* NOTREACHED */
case KGDB_EXEC:
default:
/* Unknown command. Ack with a null message. */
outlen = 0;
break;
}
/* Send the reply */
kgdb_send(out, outbuffer, outlen);
}
out:
return (1);
}
/*
* XXX: Determine if the memory at addr..(addr+len) is valid.
* XXX: Should we just use the PTE bits? Why not?
* XXX: Better yet, setup a fault handler?
*/
kgdb_acc(addr, len)
caddr_t addr;
int len;
{
vm_offset_t va;
int pte, pgoff;
va = (vm_offset_t) addr;
pgoff = va & PGOFSET;
va -= pgoff;
len += pgoff;
do {
pte = get_pte(va);
if ((pte & PG_VALID) == 0)
return (0);
va += NBPG;
len -= NBPG;
} while (len > 0);
return (1);
}
#endif /* KGDB */