2e6784a89f
target. * defs.h (enum language): Add language_asm. * findvar.c (read_register_bytes read_register_gen write_register_bytes read_register read_register_pid write_register write_register_pid supply_register): Move multi- thread handling down into these routines. Create XXX_pid routines that allow register references to specify the pid. * findvar.c infcmd.c (read_pc read_pc_pid write_pc write_pc_pid read_sp write_sp read_fp write_fp): Move these routines from infcmd to findvar to centralize the whole mess. * i386-nlmstub.c: Portability fixes. * infptrace.c (child_resume): Conditionalize to allow other natives to override it. Remove PIDGET gubbish, it's no longer necessary. * infrun.c (wait_for_inferior): Put registers_changed() before target_wait() to speed up remote debugging. * Replace code that reads registers from other threads with much nicer looking new function calls (see changes to findvar.c). * Don't skip prologues if debugging assembly source. * lynx-nat.c (child_resume): Lynx now needs it's own version of child_resume to handle multi-thread debugging properly. * remote.c: Add O response to get console output from target. * (readchar): Add timeout parameter. Handle SERIAL_EOF and SERIAL_ERROR here to simplify callers. * Change static var timeout to remote_timeout. * (fromhex): Remove unnecessary return -1 at end of routine. * (remote_wait): Turn this into a big switch statement. Add support for O response. * (putpkt): Remove unnecessary handling of SERIAL_EOF/ERROR. * (getpkt): Split getpkt into two parts. read_frame deals with all formatting issues, run-length encoding, and framing. getpkt now handles error recovery, and frame detection. * ser-tcp.c (tcp_readchar): Handle EINTR from read(). * ser-unix.c (hardwire_raw): Set CLOCAL so that we ignore modem control. (hardwire_readchar): Handle EINTR from read(). * symfile.c (deduce_language_from_filename): Add support for .s files. * config/nm-lynx.h: Define CHILD_WAIT so that lynx-nat.c can override infptrace's child_wait. * config/rs6000/rs6000lynx.mh: Use xm-rs6000ly.h & nm-rs6000ly.h instead of XXXlynx.h. * config/rs6000/rs6000lynx.mt: Use tm-rs6000ly.h instead of tm-rs6000lynx.h. * nlm/gdbserve.c: Portability fixes.
1117 lines
28 KiB
C
1117 lines
28 KiB
C
/* i386-nlmstub.c -- NLM debugging stub for the i386.
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This is originally based on an m68k software stub written by Glenn
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Engel at HP, but has changed quite a bit. It was modified for the
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i386 by Jim Kingdon, Cygnus Support. It was modified to run under
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NetWare by Ian Lance Taylor, Cygnus Support.
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This code is intended to produce an NLM (a NetWare Loadable Module)
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to run under NetWare on an i386 platform. To create the NLM,
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compile this code into an object file using the NLM SDK on any i386
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host, and use the nlmconv program (available in the GNU binutils)
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to transform the resulting object file into an NLM. */
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/****************************************************************************
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THIS SOFTWARE IS NOT COPYRIGHTED
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HP offers the following for use in the public domain. HP makes no
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warranty with regard to the software or it's performance and the
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user accepts the software "AS IS" with all faults.
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HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
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TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/
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/****************************************************************************
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*
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* The following gdb commands are supported:
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*
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* command function Return value
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*
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* g return the value of the CPU registers hex data or ENN
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* G set the value of the CPU registers OK or ENN
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*
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* mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
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* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
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*
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* c Resume at current address SNN ( signal NN)
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* cAA..AA Continue at address AA..AA SNN
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*
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* s Step one instruction SNN
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* sAA..AA Step one instruction from AA..AA SNN
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*
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* k kill
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*
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* ? What was the last sigval ? SNN (signal NN)
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*
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* All commands and responses are sent with a packet which includes a
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* checksum. A packet consists of
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*
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* $<packet info>#<checksum>.
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*
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* where
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* <packet info> :: <characters representing the command or response>
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* <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
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*
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* When a packet is received, it is first acknowledged with either '+' or '-'.
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* '+' indicates a successful transfer. '-' indicates a failed transfer.
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*
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* Example:
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*
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* Host: Reply:
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* $m0,10#2a +$00010203040506070809101112131415#42
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*
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****************************************************************************/
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#include <nwdfs.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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/*#include <ctype.h>*/
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#include <time.h>
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/*#include <aio.h>*/
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#include <nwconio.h>
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#include <nwadv.h>
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#include <nwdbgapi.h>
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/*#include <process.h>*/
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#include <errno.h>
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#include <nwthread.h>
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#include "alpha-patch.h"
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/****************************************************/
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/* This information is from Novell. It is not in any of the standard
|
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NetWare header files. */
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struct DBG_LoadDefinitionStructure
|
|
{
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void *reserved1[4];
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LONG reserved5;
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LONG LDCodeImageOffset;
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|
LONG LDCodeImageLength;
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|
LONG LDDataImageOffset;
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|
LONG LDDataImageLength;
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|
LONG LDUninitializedDataLength;
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|
LONG LDCustomDataOffset;
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|
LONG LDCustomDataSize;
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|
LONG reserved6[2];
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|
LONG (*LDInitializationProcedure)(void);
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|
};
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|
|
|
#define LO_NORMAL 0x0000
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|
#define LO_STARTUP 0x0001
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|
#define LO_PROTECT 0x0002
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|
#define LO_DEBUG 0x0004
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|
#define LO_AUTO_LOAD 0x0008
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|
|
|
/* Loader returned error codes */
|
|
#define LOAD_COULD_NOT_FIND_FILE 1
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|
#define LOAD_ERROR_READING_FILE 2
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|
#define LOAD_NOT_NLM_FILE_FORMAT 3
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|
#define LOAD_WRONG_NLM_FILE_VERSION 4
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|
#define LOAD_REENTRANT_INITIALIZE_FAILURE 5
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|
#define LOAD_CAN_NOT_LOAD_MULTIPLE_COPIES 6
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|
#define LOAD_ALREADY_IN_PROGRESS 7
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|
#define LOAD_NOT_ENOUGH_MEMORY 8
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|
#define LOAD_INITIALIZE_FAILURE 9
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|
#define LOAD_INCONSISTENT_FILE_FORMAT 10
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#define LOAD_CAN_NOT_LOAD_AT_STARTUP 11
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|
#define LOAD_AUTO_LOAD_MODULES_NOT_LOADED 12
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|
#define LOAD_UNRESOLVED_EXTERNAL 13
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|
#define LOAD_PUBLIC_ALREADY_DEFINED 14
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|
/****************************************************/
|
|
|
|
/* The main thread ID. */
|
|
static int mainthread;
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|
|
/* An error message for the main thread to print. */
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|
static char *error_message;
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|
|
/* The AIO port handle. */
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|
static int AIOhandle;
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|
|
/* BUFMAX defines the maximum number of characters in inbound/outbound
|
|
buffers. At least NUMREGBYTES*2 are needed for register packets */
|
|
#define BUFMAX (REGISTER_BYTES * 2 + 16)
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|
|
/* remote_debug > 0 prints ill-formed commands in valid packets and
|
|
checksum errors. */
|
|
static int remote_debug = 1;
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|
|
static const char hexchars[] = "0123456789abcdef";
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|
|
/* Register values. All of these values *MUST* agree with tm.h */
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|
#define RA_REGNUM 26 /* Contains return address value */
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|
#define SP_REGNUM 30 /* Contains address of top of stack */
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|
#define PC_REGNUM 64 /* Contains program counter */
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|
#define FP_REGNUM 65 /* Virtual frame pointer */
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|
#define V0_REGNUM 0 /* Function integer return value */
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|
#define NUM_REGS 66 /* Number of machine registers */
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|
#define REGISTER_BYTES (NUM_REGS * 8) /* Total size of registers array */
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|
|
#define ExceptionPC ExceptionRegs[SF_REG_PC].lo
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#define DECR_PC_AFTER_BREAK 0 /* NT's Palcode gets this right! */
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#define BREAKPOINT {0x80, 0, 0, 0} /* call_pal bpt */
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unsigned char breakpoint_insn[] = BREAKPOINT;
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#define BREAKPOINT_SIZE (sizeof breakpoint_insn)
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|
|
/*#define flush_i_cache() asm("call_pal 0x86")*/
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|
static char *mem2hex (void *mem, char *buf, int count, int may_fault);
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|
static char *hex2mem (char *buf, void *mem, int count, int may_fault);
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|
static void set_step_traps (struct StackFrame *);
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|
static void clear_step_traps (struct StackFrame *);
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|
|
#if 0
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|
__main() {};
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|
#endif
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|
/* Read a character from the serial port. This must busy wait, but
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that's OK because we will be the only thread running anyhow. */
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|
static int
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|
getDebugChar ()
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|
{
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|
int err;
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|
LONG got;
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|
unsigned char ret;
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|
|
do
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|
{
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|
err = AIOReadData (AIOhandle, (char *) &ret, 1, &got);
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|
if (err != 0)
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|
{
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|
error_message = "AIOReadData failed";
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|
ResumeThread (mainthread);
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return -1;
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|
}
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|
}
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|
while (got == 0);
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|
return ret;
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|
}
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|
|
/* Write a character to the serial port. Returns 0 on failure,
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non-zero on success. */
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static int
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|
putDebugChar (c)
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|
unsigned char c;
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|
{
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|
int err;
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|
LONG put;
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|
|
put = 0;
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|
while (put < 1)
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|
{
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|
err = AIOWriteData (AIOhandle, (char *) &c, 1, &put);
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|
if (err != 0)
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|
ConsolePrintf ("AIOWriteData: err = %d, put = %d\r\n", err, put);
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|
}
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|
return 1;
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|
}
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|
|
/* Get the registers out of the frame information. */
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|
|
static void
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|
frame_to_registers (frame, regs)
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|
struct StackFrame *frame;
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char *regs;
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|
{
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|
mem2hex (&frame->ExceptionPC, ®s[PC_REGNUM * 8 * 2], 8 * 1, 0);
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|
|
mem2hex (&frame->ExceptionRegs[SF_IREG_OFFSET], ®s[V0_REGNUM * 8 * 2], 8 * 64, 0);
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|
}
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|
|
/* Put the registers back into the frame information. */
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|
|
|
static void
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|
registers_to_frame (regs, frame)
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|
char *regs;
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struct StackFrame *frame;
|
|
{
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|
hex2mem (®s[PC_REGNUM * 8 * 2], &frame->ExceptionPC, 8 * 1, 0);
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|
|
hex2mem (®s[V0_REGNUM * 8 * 2], &frame->ExceptionRegs[SF_IREG_OFFSET], 8 * 64, 0);
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|
}
|
|
|
|
/* Turn a hex character into a number. */
|
|
|
|
static int
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|
hex (ch)
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|
char ch;
|
|
{
|
|
if ((ch >= 'a') && (ch <= 'f'))
|
|
return (ch-'a'+10);
|
|
if ((ch >= '0') && (ch <= '9'))
|
|
return (ch-'0');
|
|
if ((ch >= 'A') && (ch <= 'F'))
|
|
return (ch-'A'+10);
|
|
return (-1);
|
|
}
|
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|
|
/* Scan for the sequence $<data>#<checksum>. Returns 0 on failure,
|
|
non-zero on success. */
|
|
|
|
static int
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|
getpacket (buffer)
|
|
char * buffer;
|
|
{
|
|
unsigned char checksum;
|
|
unsigned char xmitcsum;
|
|
int i;
|
|
int count;
|
|
int ch;
|
|
|
|
do
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|
{
|
|
/* wait around for the start character, ignore all other characters */
|
|
while ((ch = getDebugChar()) != '$')
|
|
if (ch == -1)
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|
return 0;
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|
checksum = 0;
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|
xmitcsum = -1;
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|
|
|
count = 0;
|
|
|
|
/* now, read until a # or end of buffer is found */
|
|
while (count < BUFMAX)
|
|
{
|
|
ch = getDebugChar();
|
|
if (ch == -1)
|
|
return 0;
|
|
if (ch == '#')
|
|
break;
|
|
checksum = checksum + ch;
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|
buffer[count] = ch;
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|
count = count + 1;
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|
}
|
|
buffer[count] = 0;
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|
|
if (ch == '#')
|
|
{
|
|
ch = getDebugChar ();
|
|
if (ch == -1)
|
|
return 0;
|
|
xmitcsum = hex(ch) << 4;
|
|
ch = getDebugChar ();
|
|
if (ch == -1)
|
|
return 0;
|
|
xmitcsum += hex(ch);
|
|
|
|
if (checksum != xmitcsum)
|
|
{
|
|
if (remote_debug)
|
|
ConsolePrintf ("bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
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|
checksum,xmitcsum,buffer);
|
|
/* failed checksum */
|
|
if (! putDebugChar('-'))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
/* successful transfer */
|
|
if (! putDebugChar('+'))
|
|
return 0;
|
|
/* if a sequence char is present, reply the sequence ID */
|
|
if (buffer[2] == ':')
|
|
{
|
|
if (! putDebugChar (buffer[0])
|
|
|| ! putDebugChar (buffer[1]))
|
|
return 0;
|
|
/* remove sequence chars from buffer */
|
|
count = strlen(buffer);
|
|
for (i=3; i <= count; i++)
|
|
buffer[i-3] = buffer[i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
while (checksum != xmitcsum);
|
|
|
|
if (remote_debug)
|
|
ConsolePrintf ("Received packet \"%s\"\r\n", buffer);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Send the packet in buffer. Returns 0 on failure, non-zero on
|
|
success. */
|
|
|
|
static int
|
|
putpacket (buffer)
|
|
char * buffer;
|
|
{
|
|
unsigned char checksum;
|
|
int count;
|
|
int ch;
|
|
|
|
if (remote_debug)
|
|
ConsolePrintf ("Sending packet \"%s\"\r\n", buffer);
|
|
|
|
/* $<packet info>#<checksum>. */
|
|
do
|
|
{
|
|
if (! putDebugChar('$'))
|
|
return 0;
|
|
checksum = 0;
|
|
count = 0;
|
|
|
|
while (ch=buffer[count])
|
|
{
|
|
if (! putDebugChar(ch))
|
|
return 0;
|
|
checksum += ch;
|
|
count += 1;
|
|
}
|
|
|
|
if (! putDebugChar('#')
|
|
|| ! putDebugChar(hexchars[checksum >> 4])
|
|
|| ! putDebugChar(hexchars[checksum % 16]))
|
|
return 0;
|
|
|
|
ch = getDebugChar ();
|
|
if (ch == -1)
|
|
return 0;
|
|
}
|
|
while (ch != '+');
|
|
|
|
return 1;
|
|
}
|
|
|
|
static char remcomInBuffer[BUFMAX];
|
|
static char remcomOutBuffer[BUFMAX];
|
|
static short error;
|
|
|
|
static void
|
|
debug_error (format, parm)
|
|
char *format;
|
|
char *parm;
|
|
{
|
|
if (remote_debug)
|
|
{
|
|
ConsolePrintf (format, parm);
|
|
ConsolePrintf ("\n");
|
|
}
|
|
}
|
|
|
|
/* This is set if we could get a memory access fault. */
|
|
static int mem_may_fault;
|
|
|
|
/* Indicate to caller of mem2hex or hex2mem that there has been an
|
|
error. */
|
|
static volatile int mem_err = 0;
|
|
|
|
/* These are separate functions so that they are so short and sweet
|
|
that the compiler won't save any registers (if there is a fault
|
|
to mem_fault, they won't get restored, so there better not be any
|
|
saved). */
|
|
|
|
static int
|
|
get_char (addr)
|
|
char *addr;
|
|
{
|
|
return *addr;
|
|
}
|
|
|
|
static void
|
|
set_char (addr, val)
|
|
char *addr;
|
|
int val;
|
|
{
|
|
*addr = val;
|
|
}
|
|
|
|
/* This bit of assembly language just returns from a function. If a
|
|
memory error occurs within get_char or set_char, the debugger
|
|
handler points EIP at these instructions to get out. */
|
|
|
|
extern void just_return ();
|
|
#if 0
|
|
asm (".globl just_return");
|
|
asm (".globl _just_return");
|
|
asm ("just_return:");
|
|
asm ("_just_return:");
|
|
asm ("leave");
|
|
asm ("ret");
|
|
#endif
|
|
|
|
/* convert the memory pointed to by mem into hex, placing result in buf */
|
|
/* return a pointer to the last char put in buf (null) */
|
|
/* If MAY_FAULT is non-zero, then we should set mem_err in response to
|
|
a fault; if zero treat a fault like any other fault in the stub. */
|
|
|
|
static char *
|
|
mem2hex (mem, buf, count, may_fault)
|
|
void *mem;
|
|
char *buf;
|
|
int count;
|
|
int may_fault;
|
|
{
|
|
int i;
|
|
unsigned char ch;
|
|
char *ptr = mem;
|
|
|
|
mem_may_fault = may_fault;
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
ch = get_char (ptr++);
|
|
if (may_fault && mem_err)
|
|
return (buf);
|
|
*buf++ = hexchars[ch >> 4];
|
|
*buf++ = hexchars[ch % 16];
|
|
}
|
|
*buf = 0;
|
|
mem_may_fault = 0;
|
|
return(buf);
|
|
}
|
|
|
|
/* convert the hex array pointed to by buf into binary to be placed in mem */
|
|
/* return a pointer to the character AFTER the last byte written */
|
|
|
|
static char *
|
|
hex2mem (buf, mem, count, may_fault)
|
|
char *buf;
|
|
void *mem;
|
|
int count;
|
|
int may_fault;
|
|
{
|
|
int i;
|
|
unsigned char ch;
|
|
char *ptr = mem;
|
|
|
|
mem_may_fault = may_fault;
|
|
for (i=0;i<count;i++)
|
|
{
|
|
ch = hex(*buf++) << 4;
|
|
ch = ch + hex(*buf++);
|
|
set_char (ptr++, ch);
|
|
if (may_fault && mem_err)
|
|
return (ptr);
|
|
}
|
|
mem_may_fault = 0;
|
|
return(mem);
|
|
}
|
|
|
|
/* This function takes the 386 exception vector and attempts to
|
|
translate this number into a unix compatible signal value. */
|
|
|
|
static int
|
|
computeSignal (exceptionVector)
|
|
int exceptionVector;
|
|
{
|
|
int sigval;
|
|
switch (exceptionVector)
|
|
{
|
|
case 0 : sigval = 8; break; /* divide by zero */
|
|
case 1 : sigval = 5; break; /* debug exception */
|
|
case 3 : sigval = 5; break; /* breakpoint */
|
|
case 4 : sigval = 16; break; /* into instruction (overflow) */
|
|
case 5 : sigval = 16; break; /* bound instruction */
|
|
case 6 : sigval = 4; break; /* Invalid opcode */
|
|
case 7 : sigval = 8; break; /* coprocessor not available */
|
|
case 8 : sigval = 7; break; /* double fault */
|
|
case 9 : sigval = 11; break; /* coprocessor segment overrun */
|
|
case 10 : sigval = 11; break; /* Invalid TSS */
|
|
case 11 : sigval = 11; break; /* Segment not present */
|
|
case 12 : sigval = 11; break; /* stack exception */
|
|
case 13 : sigval = 11; break; /* general protection */
|
|
case 14 : sigval = 11; break; /* page fault */
|
|
case 16 : sigval = 7; break; /* coprocessor error */
|
|
default:
|
|
sigval = 7; /* "software generated"*/
|
|
}
|
|
return (sigval);
|
|
}
|
|
|
|
/**********************************************/
|
|
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
|
|
/* RETURN NUMBER OF CHARS PROCESSED */
|
|
/**********************************************/
|
|
static int
|
|
hexToInt(ptr, intValue)
|
|
char **ptr;
|
|
int *intValue;
|
|
{
|
|
int numChars = 0;
|
|
int hexValue;
|
|
|
|
*intValue = 0;
|
|
|
|
while (**ptr)
|
|
{
|
|
hexValue = hex(**ptr);
|
|
if (hexValue >=0)
|
|
{
|
|
*intValue = (*intValue <<4) | hexValue;
|
|
numChars ++;
|
|
}
|
|
else
|
|
break;
|
|
|
|
(*ptr)++;
|
|
}
|
|
|
|
return (numChars);
|
|
}
|
|
|
|
union inst
|
|
{
|
|
LONG l;
|
|
|
|
struct
|
|
{
|
|
union
|
|
{
|
|
struct
|
|
{
|
|
unsigned hint : 16;
|
|
unsigned rb : 5;
|
|
unsigned ra : 5;
|
|
unsigned opcode : 6;
|
|
} jump;
|
|
struct
|
|
{
|
|
signed disp : 21;
|
|
unsigned ra : 5;
|
|
unsigned opcode : 6;
|
|
} branch;
|
|
} variant;
|
|
} inst;
|
|
};
|
|
|
|
static LONG saved_inst;
|
|
static LONG *saved_inst_pc = 0;
|
|
static LONG saved_target_inst;
|
|
static LONG *saved_target_inst_pc = 0;
|
|
|
|
static void
|
|
set_step_traps (frame)
|
|
struct StackFrame *frame;
|
|
{
|
|
union inst inst;
|
|
LONG *target;
|
|
int opcode;
|
|
int ra, rb;
|
|
LONG *pc = (LONG *)frame->ExceptionPC;
|
|
|
|
inst.l = *pc++;
|
|
|
|
opcode = inst.inst.variant.branch.opcode;
|
|
|
|
if ((opcode & 0x30) == 0x30) /* A branch of some sort */
|
|
target = inst.inst.variant.branch.disp + pc;
|
|
else if (opcode == 0x1a) /* jmp, ret, etc... */
|
|
target = (LONG *)(frame->ExceptionRegs[SF_IREG_OFFSET
|
|
+ inst.inst.variant.jump.rb].lo
|
|
& ~3);
|
|
else
|
|
target = pc;
|
|
|
|
saved_inst = *pc;
|
|
*pc = 0x80; /* call_pal bpt */
|
|
saved_inst_pc = pc;
|
|
|
|
if (target != pc)
|
|
{
|
|
saved_target_inst = *target;
|
|
*target = 0x80; /* call_pal bpt */
|
|
saved_target_inst_pc = target;
|
|
}
|
|
}
|
|
|
|
/* Remove step breakpoints. Returns non-zero if pc was at a step breakpoint,
|
|
zero otherwise. This routine works even if there were no step breakpoints
|
|
set. */
|
|
|
|
static int
|
|
clear_step_traps (frame)
|
|
struct StackFrame *frame;
|
|
{
|
|
int retcode;
|
|
LONG *pc = (LONG *)frame->ExceptionPC;
|
|
|
|
if (saved_inst_pc == pc || saved_target_inst_pc == pc)
|
|
retcode = 1;
|
|
else
|
|
retcode = 0;
|
|
|
|
if (saved_inst_pc)
|
|
{
|
|
*saved_inst_pc = saved_inst;
|
|
saved_inst_pc = 0;
|
|
}
|
|
|
|
if (saved_target_inst_pc)
|
|
{
|
|
*saved_target_inst_pc = saved_target_inst;
|
|
saved_target_inst_pc = 0;
|
|
}
|
|
|
|
return retcode;
|
|
}
|
|
|
|
static void
|
|
do_status (ptr, frame)
|
|
char *ptr;
|
|
struct StackFrame *frame;
|
|
{
|
|
int sigval;
|
|
|
|
sigval = computeSignal (frame->ExceptionNumber);
|
|
|
|
sprintf (ptr, "T%02x", sigval);
|
|
ptr += 3;
|
|
|
|
sprintf (ptr, "%02x:", PC_REGNUM);
|
|
ptr = mem2hex (&frame->ExceptionPC, ptr + 3, 8, 0);
|
|
*ptr++ = ';';
|
|
|
|
sprintf (ptr, "%02x:", SP_REGNUM);
|
|
ptr = mem2hex (&frame->ExceptionRegs[SF_IREG_OFFSET + SP_REGNUM], ptr + 3, 8, 0);
|
|
*ptr++ = ';';
|
|
|
|
sprintf (ptr, "%02x:", RA_REGNUM);
|
|
ptr = mem2hex (&frame->ExceptionRegs[SF_IREG_OFFSET + RA_REGNUM], ptr + 3, 8, 0);
|
|
*ptr++ = ';';
|
|
|
|
sprintf (ptr, "%02x:", FP_REGNUM);
|
|
ptr = mem2hex (&frame->ExceptionRegs[SF_IREG_OFFSET + FP_REGNUM], ptr + 3, 8, 0);
|
|
*ptr++ = ';';
|
|
|
|
*ptr = '\000';
|
|
}
|
|
|
|
/* This function does all command processing for interfacing to gdb.
|
|
It is called whenever an exception occurs in the module being
|
|
debugged. */
|
|
|
|
static LONG
|
|
handle_exception (frame)
|
|
struct StackFrame *frame;
|
|
{
|
|
int addr, length;
|
|
char *ptr;
|
|
static struct DBG_LoadDefinitionStructure *ldinfo = 0;
|
|
static unsigned char first_insn[BREAKPOINT_SIZE]; /* The first instruction in the program. */
|
|
|
|
/* Apparently the bell can sometimes be ringing at this point, and
|
|
should be stopped. */
|
|
StopBell ();
|
|
|
|
if (remote_debug)
|
|
{
|
|
ConsolePrintf ("vector=%d: %s, pc=%08x, thread=%08x\r\n",
|
|
frame->ExceptionNumber,
|
|
frame->ExceptionDescription,
|
|
frame->ExceptionPC,
|
|
GetThreadID ());
|
|
}
|
|
|
|
switch (frame->ExceptionNumber)
|
|
{
|
|
case START_NLM_EVENT:
|
|
/* If the NLM just started, we record the module load information
|
|
and the thread ID, and set a breakpoint at the first instruction
|
|
in the program. */
|
|
|
|
ldinfo = ((struct DBG_LoadDefinitionStructure *)
|
|
frame->ExceptionErrorCode);
|
|
memcpy (first_insn, ldinfo->LDInitializationProcedure,
|
|
BREAKPOINT_SIZE);
|
|
memcpy (ldinfo->LDInitializationProcedure, breakpoint_insn,
|
|
BREAKPOINT_SIZE);
|
|
flush_i_cache ();
|
|
return RETURN_TO_PROGRAM;
|
|
|
|
case ENTER_DEBUGGER_EVENT:
|
|
case KEYBOARD_BREAK_EVENT:
|
|
/* Pass some events on to the next debugger, in case it will handle
|
|
them. */
|
|
return RETURN_TO_NEXT_DEBUGGER;
|
|
|
|
case 3: /* Breakpoint */
|
|
/* After we've reached the initial breakpoint, reset it. */
|
|
if (frame->ExceptionPC - DECR_PC_AFTER_BREAK == (LONG) ldinfo->LDInitializationProcedure
|
|
&& memcmp (ldinfo->LDInitializationProcedure, breakpoint_insn,
|
|
BREAKPOINT_SIZE) == 0)
|
|
{
|
|
memcpy (ldinfo->LDInitializationProcedure, first_insn,
|
|
BREAKPOINT_SIZE);
|
|
frame->ExceptionPC -= DECR_PC_AFTER_BREAK;
|
|
flush_i_cache ();
|
|
}
|
|
/* Normal breakpoints end up here */
|
|
do_status (remcomOutBuffer, frame);
|
|
break;
|
|
|
|
default:
|
|
/* At the moment, we don't care about most of the unusual NetWare
|
|
exceptions. */
|
|
if (frame->ExceptionNumber > 31)
|
|
return RETURN_TO_PROGRAM;
|
|
|
|
/* Most machine level exceptions end up here */
|
|
do_status (remcomOutBuffer, frame);
|
|
break;
|
|
|
|
case 11: /* Segment not present */
|
|
case 13: /* General protection */
|
|
case 14: /* Page fault */
|
|
/* If we get a GP fault, and mem_may_fault is set, and the
|
|
instruction pointer is near set_char or get_char, then we caused
|
|
the fault ourselves accessing an illegal memory location. */
|
|
if (mem_may_fault
|
|
&& ((frame->ExceptionPC >= (long) &set_char
|
|
&& frame->ExceptionPC < (long) &set_char + 50)
|
|
|| (frame->ExceptionPC >= (long) &get_char
|
|
&& frame->ExceptionPC < (long) &get_char + 50)))
|
|
{
|
|
mem_err = 1;
|
|
/* Point the instruction pointer at an assembly language stub
|
|
which just returns from the function. */
|
|
|
|
frame->ExceptionPC += 4; /* Skip the load or store */
|
|
|
|
/* Keep going. This will act as though it returned from
|
|
set_char or get_char. The calling routine will check
|
|
mem_err, and do the right thing. */
|
|
return RETURN_TO_PROGRAM;
|
|
}
|
|
/* Random mem fault, report it */
|
|
do_status (remcomOutBuffer, frame);
|
|
break;
|
|
|
|
case TERMINATE_NLM_EVENT:
|
|
/* There is no way to get the exit status. */
|
|
sprintf (remcomOutBuffer, "W%02x", 0);
|
|
break; /* We generate our own status */
|
|
}
|
|
|
|
/* FIXME: How do we know that this exception has anything to do with
|
|
the program we are debugging? We can check whether the PC is in
|
|
the range of the module we are debugging, but that doesn't help
|
|
much since an error could occur in a library routine. */
|
|
|
|
clear_step_traps (frame);
|
|
|
|
if (! putpacket(remcomOutBuffer))
|
|
return RETURN_TO_NEXT_DEBUGGER;
|
|
|
|
if (frame->ExceptionNumber == TERMINATE_NLM_EVENT)
|
|
{
|
|
ResumeThread (mainthread);
|
|
return RETURN_TO_PROGRAM;
|
|
}
|
|
|
|
while (1)
|
|
{
|
|
error = 0;
|
|
remcomOutBuffer[0] = 0;
|
|
if (! getpacket (remcomInBuffer))
|
|
return RETURN_TO_NEXT_DEBUGGER;
|
|
switch (remcomInBuffer[0])
|
|
{
|
|
case '?':
|
|
do_status (remcomOutBuffer, frame);
|
|
break;
|
|
case 'd':
|
|
remote_debug = !(remote_debug); /* toggle debug flag */
|
|
break;
|
|
case 'g':
|
|
/* return the value of the CPU registers */
|
|
frame_to_registers (frame, remcomOutBuffer);
|
|
break;
|
|
case 'G':
|
|
/* set the value of the CPU registers - return OK */
|
|
registers_to_frame (&remcomInBuffer[1], frame);
|
|
strcpy(remcomOutBuffer,"OK");
|
|
break;
|
|
|
|
case 'm':
|
|
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
|
|
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
|
|
ptr = &remcomInBuffer[1];
|
|
if (hexToInt(&ptr,&addr))
|
|
if (*(ptr++) == ',')
|
|
if (hexToInt(&ptr,&length))
|
|
{
|
|
ptr = 0;
|
|
mem_err = 0;
|
|
mem2hex((char*) addr, remcomOutBuffer, length, 1);
|
|
if (mem_err)
|
|
{
|
|
strcpy (remcomOutBuffer, "E03");
|
|
debug_error ("memory fault");
|
|
}
|
|
}
|
|
|
|
if (ptr)
|
|
{
|
|
strcpy(remcomOutBuffer,"E01");
|
|
debug_error("malformed read memory command: %s",remcomInBuffer);
|
|
}
|
|
break;
|
|
|
|
case 'M':
|
|
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
|
|
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
|
|
ptr = &remcomInBuffer[1];
|
|
if (hexToInt(&ptr,&addr))
|
|
if (*(ptr++) == ',')
|
|
if (hexToInt(&ptr,&length))
|
|
if (*(ptr++) == ':')
|
|
{
|
|
mem_err = 0;
|
|
hex2mem(ptr, (char*) addr, length, 1);
|
|
|
|
if (mem_err)
|
|
{
|
|
strcpy (remcomOutBuffer, "E03");
|
|
debug_error ("memory fault");
|
|
}
|
|
else
|
|
{
|
|
strcpy(remcomOutBuffer,"OK");
|
|
}
|
|
|
|
ptr = 0;
|
|
}
|
|
if (ptr)
|
|
{
|
|
strcpy(remcomOutBuffer,"E02");
|
|
debug_error("malformed write memory command: %s",remcomInBuffer);
|
|
}
|
|
break;
|
|
|
|
case 'c':
|
|
case 's':
|
|
/* cAA..AA Continue at address AA..AA(optional) */
|
|
/* sAA..AA Step one instruction from AA..AA(optional) */
|
|
/* try to read optional parameter, pc unchanged if no parm */
|
|
ptr = &remcomInBuffer[1];
|
|
if (hexToInt(&ptr,&addr))
|
|
{
|
|
/* registers[PC_REGNUM].lo = addr;*/
|
|
fprintf (stderr, "Setting PC to 0x%x\n", addr);
|
|
while (1);
|
|
}
|
|
|
|
if (remcomInBuffer[0] == 's')
|
|
set_step_traps (frame);
|
|
|
|
flush_i_cache ();
|
|
return RETURN_TO_PROGRAM;
|
|
|
|
case 'k':
|
|
/* kill the program */
|
|
KillMe (ldinfo);
|
|
ResumeThread (mainthread);
|
|
return RETURN_TO_PROGRAM;
|
|
|
|
case 'q': /* Query message */
|
|
if (strcmp (&remcomInBuffer[1], "Offsets") == 0)
|
|
{
|
|
sprintf (remcomOutBuffer, "Text=%x;Data=%x;Bss=%x",
|
|
ldinfo->LDCodeImageOffset,
|
|
ldinfo->LDDataImageOffset,
|
|
ldinfo->LDDataImageOffset + ldinfo->LDDataImageLength);
|
|
}
|
|
else
|
|
sprintf (remcomOutBuffer, "E04, Unknown query %s", &remcomInBuffer[1]);
|
|
break;
|
|
}
|
|
|
|
/* reply to the request */
|
|
if (! putpacket(remcomOutBuffer))
|
|
return RETURN_TO_NEXT_DEBUGGER;
|
|
}
|
|
}
|
|
|
|
char *baudRates[] = { "50", "75", "110", "134.5", "150", "300", "600", "1200",
|
|
"1800", "2000", "2400", "3600", "4800", "7200", "9600",
|
|
"19200", "38400", "57600", "115200" };
|
|
|
|
char dataBits[] = "5678";
|
|
|
|
char *stopBits[] = { "1", "1.5", "2" };
|
|
|
|
char parity[] = "NOEMS";
|
|
|
|
/* Start up. The main thread opens the named serial I/O port, loads
|
|
the named NLM module and then goes to sleep. The serial I/O port
|
|
is named as a board number and a port number. It would be more DOS
|
|
like to provide a menu of available serial ports, but I don't want
|
|
to have to figure out how to do that. */
|
|
|
|
int
|
|
main (argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
int hardware, board, port;
|
|
LONG err;
|
|
struct debuggerStructure s;
|
|
char *cmdlin;
|
|
int i;
|
|
|
|
/* Use the -B option to invoke the NID if you want to debug the stub. */
|
|
|
|
if (argc > 1 && strcmp(argv[1], "-B") == 0)
|
|
{
|
|
Breakpoint(argc);
|
|
++argv, --argc;
|
|
}
|
|
|
|
if (argc < 4)
|
|
{
|
|
fprintf (stderr,
|
|
"Usage: load gdbserve board port program [arguments]\n");
|
|
exit (1);
|
|
}
|
|
|
|
hardware = -1;
|
|
board = strtol (argv[1], (char **) NULL, 0);
|
|
port = strtol (argv[2], (char **) NULL, 0);
|
|
|
|
err = AIOAcquirePort (&hardware, &board, &port, &AIOhandle);
|
|
if (err != AIO_SUCCESS)
|
|
{
|
|
switch (err)
|
|
{
|
|
case AIO_PORT_NOT_AVAILABLE:
|
|
fprintf (stderr, "Port not available\n");
|
|
break;
|
|
|
|
case AIO_BOARD_NUMBER_INVALID:
|
|
case AIO_PORT_NUMBER_INVALID:
|
|
fprintf (stderr, "No such port\n");
|
|
break;
|
|
|
|
default:
|
|
fprintf (stderr, "Could not open port: %d\n", err);
|
|
break;
|
|
}
|
|
|
|
exit (1);
|
|
}
|
|
|
|
err = AIOConfigurePort (AIOhandle, AIO_BAUD_9600, AIO_DATA_BITS_8,
|
|
AIO_STOP_BITS_1, AIO_PARITY_NONE,
|
|
AIO_HARDWARE_FLOW_CONTROL_OFF);
|
|
|
|
if (err == AIO_QUALIFIED_SUCCESS)
|
|
{
|
|
AIOPORTCONFIG portConfig;
|
|
AIODVRCONFIG dvrConfig;
|
|
|
|
fprintf (stderr, "Port configuration changed!\n");
|
|
AIOGetPortConfiguration (AIOhandle, &portConfig, &dvrConfig);
|
|
fprintf (stderr,
|
|
" Bit Rate: %s, Data Bits: %c, Stop Bits: %s, Parity: %c,\
|
|
Flow:%s\n",
|
|
baudRates[portConfig.bitRate],
|
|
dataBits[portConfig.dataBits],
|
|
stopBits[portConfig.stopBits],
|
|
parity[portConfig.parityMode],
|
|
portConfig.flowCtrlMode ? "ON" : "OFF");
|
|
}
|
|
else if (err != AIO_SUCCESS)
|
|
{
|
|
fprintf (stderr, "Could not configure port: %d\n", err);
|
|
AIOReleasePort (AIOhandle);
|
|
exit (1);
|
|
}
|
|
|
|
if (AIOSetExternalControl(AIOhandle, AIO_EXTERNAL_CONTROL,
|
|
(AIO_EXTCTRL_DTR | AIO_EXTCTRL_RTS))
|
|
!= AIO_SUCCESS)
|
|
{
|
|
LONG extStatus, chgdExtStatus;
|
|
|
|
fprintf (stderr, "Could not set desired port controls!\n");
|
|
AIOGetExternalStatus (AIOhandle, &extStatus, &chgdExtStatus);
|
|
fprintf (stderr, "Port controls now: %d, %d\n", extStatus,
|
|
chgdExtStatus);
|
|
}
|
|
|
|
/* Register ourselves as an alternate debugger. */
|
|
memset (&s, 0, sizeof s);
|
|
s.DDSResourceTag = ((struct ResourceTagStructure *)
|
|
AllocateResourceTag (GetNLMHandle (),
|
|
(BYTE *)"gdbserver",
|
|
DebuggerSignature));
|
|
if (s.DDSResourceTag == 0)
|
|
{
|
|
fprintf (stderr, "AllocateResourceTag failed\n");
|
|
AIOReleasePort (AIOhandle);
|
|
exit (1);
|
|
}
|
|
s.DDSdebuggerEntry = handle_exception;
|
|
s.DDSFlags = TSS_FRAME_BIT;
|
|
|
|
err = RegisterDebuggerRTag (&s, AT_FIRST);
|
|
if (err != 0)
|
|
{
|
|
fprintf (stderr, "RegisterDebuggerRTag failed\n");
|
|
AIOReleasePort (AIOhandle);
|
|
exit (1);
|
|
}
|
|
|
|
/* Get the command line we were invoked with, and advance it past
|
|
our name and the board and port arguments. */
|
|
cmdlin = getcmd ((char *) NULL);
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
while (! isspace (*cmdlin))
|
|
++cmdlin;
|
|
while (isspace (*cmdlin))
|
|
++cmdlin;
|
|
}
|
|
|
|
/* In case GDB is started before us, ack any packets (presumably
|
|
"$?#xx") sitting there. */
|
|
if (! putDebugChar ('+'))
|
|
{
|
|
fprintf (stderr, "putDebugChar failed\n");
|
|
UnRegisterDebugger (&s);
|
|
AIOReleasePort (AIOhandle);
|
|
exit (1);
|
|
}
|
|
|
|
mainthread = GetThreadID ();
|
|
|
|
if (remote_debug > 0)
|
|
ConsolePrintf ("About to call LoadModule with \"%s\" %08x\r\n",
|
|
cmdlin, __GetScreenID (GetCurrentScreen()));
|
|
|
|
/* Start up the module to be debugged. */
|
|
err = LoadModule ((struct ScreenStruct *) __GetScreenID (GetCurrentScreen()),
|
|
(BYTE *)cmdlin, LO_DEBUG);
|
|
if (err != 0)
|
|
{
|
|
fprintf (stderr, "LoadModule failed: %d\n", err);
|
|
UnRegisterDebugger (&s);
|
|
AIOReleasePort (AIOhandle);
|
|
exit (1);
|
|
}
|
|
|
|
/* Wait for the debugger to wake us up. */
|
|
if (remote_debug > 0)
|
|
ConsolePrintf ("Suspending main thread (%08x)\r\n", mainthread);
|
|
SuspendThread (mainthread);
|
|
if (remote_debug > 0)
|
|
ConsolePrintf ("Resuming main thread (%08x)\r\n", mainthread);
|
|
|
|
/* If we are woken up, print an optional error message, deregister
|
|
ourselves and exit. */
|
|
if (error_message != NULL)
|
|
fprintf (stderr, "%s\n", error_message);
|
|
UnRegisterDebugger (&s);
|
|
AIOReleasePort (AIOhandle);
|
|
exit (0);
|
|
}
|