-/* i386-nlmstub.c -- NLM debugging stub for the i386.
-
- This is originally based on an m68k software stub written by Glenn
- Engel at HP, but has changed quite a bit. It was modified for the
- i386 by Jim Kingdon, Cygnus Support. It was modified to run under
- NetWare by Ian Lance Taylor, Cygnus Support.
-
- This code is intended to produce an NLM (a NetWare Loadable Module)
- to run under NetWare on an i386 platform. To create the NLM,
- compile this code into an object file using the NLM SDK on any i386
- host, and use the nlmconv program (available in the GNU binutils)
- to transform the resulting object file into an NLM. */
-
-/****************************************************************************
-
- THIS SOFTWARE IS NOT COPYRIGHTED
-
- HP offers the following for use in the public domain. HP makes no
- warranty with regard to the software or it's performance and the
- user accepts the software "AS IS" with all faults.
-
- HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
- TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-
-****************************************************************************/
-
-/****************************************************************************
- *
- * The following gdb commands are supported:
- *
- * command function Return value
- *
- * g return the value of the CPU registers hex data or ENN
- * G set the value of the CPU registers OK or ENN
- *
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
- *
- * c Resume at current address SNN ( signal NN)
- * cAA..AA Continue at address AA..AA SNN
- *
- * s Step one instruction SNN
- * sAA..AA Step one instruction from AA..AA SNN
- *
- * k kill
- *
- * ? What was the last sigval ? SNN (signal NN)
- *
- * All commands and responses are sent with a packet which includes a
- * checksum. A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer. '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host: Reply:
- * $m0,10#2a +$00010203040506070809101112131415#42
- *
- ****************************************************************************/
-
-#include <dfs.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <time.h>
-#include <aio.h>
-#include <conio.h>
-#include <advanced.h>
-#include <debugapi.h>
-#include <process.h>
-
-/****************************************************/
-/* This information is from Novell. It is not in any of the standard
- NetWare header files. */
-
-struct DBG_LoadDefinitionStructure
-{
- void *reserved1[4];
- LONG reserved5;
- LONG LDCodeImageOffset;
- LONG LDCodeImageLength;
- LONG LDDataImageOffset;
- LONG LDDataImageLength;
- LONG LDUninitializedDataLength;
- LONG LDCustomDataOffset;
- LONG LDCustomDataSize;
- LONG reserved6[2];
- LONG (*LDInitializationProcedure)(void);
-};
-
-#define LO_NORMAL 0x0000
-#define LO_STARTUP 0x0001
-#define LO_PROTECT 0x0002
-#define LO_DEBUG 0x0004
-#define LO_AUTO_LOAD 0x0008
-
-/* Loader returned error codes */
-#define LOAD_COULD_NOT_FIND_FILE 1
-#define LOAD_ERROR_READING_FILE 2
-#define LOAD_NOT_NLM_FILE_FORMAT 3
-#define LOAD_WRONG_NLM_FILE_VERSION 4
-#define LOAD_REENTRANT_INITIALIZE_FAILURE 5
-#define LOAD_CAN_NOT_LOAD_MULTIPLE_COPIES 6
-#define LOAD_ALREADY_IN_PROGRESS 7
-#define LOAD_NOT_ENOUGH_MEMORY 8
-#define LOAD_INITIALIZE_FAILURE 9
-#define LOAD_INCONSISTENT_FILE_FORMAT 10
-#define LOAD_CAN_NOT_LOAD_AT_STARTUP 11
-#define LOAD_AUTO_LOAD_MODULES_NOT_LOADED 12
-#define LOAD_UNRESOLVED_EXTERNAL 13
-#define LOAD_PUBLIC_ALREADY_DEFINED 14
-/****************************************************/
-
-/* The main thread ID. */
-static int mainthread;
-
-/* The LoadDefinitionStructure of the NLM being debugged. */
-static struct DBG_LoadDefinitionStructure *handle;
-
-/* Whether we have connected to gdb. */
-static int talking;
-
-/* The actual first instruction in the program. */
-static unsigned char first_insn;
-
-/* An error message for the main thread to print. */
-static char *error_message;
-
-/* The AIO port handle. */
-static int AIOhandle;
-
-/* The console screen. */
-static int console_screen;
-
-/* BUFMAX defines the maximum number of characters in inbound/outbound
- buffers. At least NUMREGBYTES*2 are needed for register packets */
-#define BUFMAX 400
-
-/* remote_debug > 0 prints ill-formed commands in valid packets and
- checksum errors. */
-static int remote_debug = 1;
-
-static const char hexchars[] = "0123456789abcdef";
-
-/* Number of bytes of registers. */
-#define NUMREGBYTES 64
-enum regnames {EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
- PC /* also known as eip */,
- PS /* also known as eflags */,
- CS, SS, DS, ES, FS, GS};
-
-/* Register values. */
-static int registers[NUMREGBYTES/4];
-
-/* Read a character from the serial port. This must busy wait, but
- that's OK because we will be the only thread running anyhow. */
-
-static int
-getDebugChar ()
-{
- int err;
- LONG got;
- unsigned char ret;
-
- do
- {
- err = AIOReadData (AIOhandle, (char *) &ret, 1, &got);
- if (err != 0)
- {
- error_message = "AIOReadData failed";
- ResumeThread (mainthread);
- return -1;
- }
- }
- while (got == 0);
-
- return ret;
-}
-
-/* Write a character to the serial port. Returns 0 on failure,
- non-zero on success. */
-
-static int
-putDebugChar (c)
- unsigned char c;
-{
- int err;
- LONG put;
-
- err = AIOWriteData (AIOhandle, (char *) &c, 1, &put);
- if (err != 0 || put != 1)
- {
- error_message = "AIOWriteData failed";
- ResumeThread (mainthread);
- return 0;
- }
- return 1;
-}
-
-/* Get the registers out of the frame information. */
-
-static void
-frame_to_registers (frame, regs)
- T_TSS_StackFrame *frame;
- int *regs;
-{
- regs[EAX] = frame->ExceptionEAX;
- regs[ECX] = frame->ExceptionECX;
- regs[EDX] = frame->ExceptionEDX;
- regs[EBX] = frame->ExceptionEBX;
- regs[ESP] = frame->ExceptionESP;
- regs[EBP] = frame->ExceptionEBP;
- regs[ESI] = frame->ExceptionESI;
- regs[EDI] = frame->ExceptionEDI;
- regs[PC] = frame->ExceptionEIP;
- regs[PS] = frame->ExceptionSystemFlags;
- regs[CS] = frame->ExceptionCS[0];
- regs[SS] = frame->ExceptionSS[0];
- regs[DS] = frame->ExceptionDS[0];
- regs[ES] = frame->ExceptionES[0];
- regs[FS] = frame->ExceptionFS[0];
- regs[GS] = frame->ExceptionGS[0];
-}
-
-/* Put the registers back into the frame information. */
-
-static void
-registers_to_frame (regs, frame)
- int *regs;
- T_TSS_StackFrame *frame;
-{
- frame->ExceptionEAX = regs[EAX];
- frame->ExceptionECX = regs[ECX];
- frame->ExceptionEDX = regs[EDX];
- frame->ExceptionEBX = regs[EBX];
- frame->ExceptionESP = regs[ESP];
- frame->ExceptionEBP = regs[EBP];
- frame->ExceptionESI = regs[ESI];
- frame->ExceptionEDI = regs[EDI];
- frame->ExceptionEIP = regs[PC];
- frame->ExceptionSystemFlags = regs[PS];
- frame->ExceptionCS[0] = regs[CS];
- frame->ExceptionSS[0] = regs[SS];
- frame->ExceptionDS[0] = regs[DS];
- frame->ExceptionES[0] = regs[ES];
- frame->ExceptionFS[0] = regs[FS];
- frame->ExceptionGS[0] = regs[GS];
-}
-
-/* Turn a hex character into a number. */
-
-static int
-hex (ch)
- 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);
-}
-
-/* Scan for the sequence $<data>#<checksum>. Returns 0 on failure,
- non-zero on success. */
-
-static int
-getpacket (buffer)
- char * buffer;
-{
- unsigned char checksum;
- unsigned char xmitcsum;
- int i;
- int count;
- int ch;
-
- do
- {
- /* wait around for the start character, ignore all other characters */
- while ((ch = getDebugChar()) != '$')
- if (ch == -1)
- return 0;
- checksum = 0;
- xmitcsum = -1;
-
- 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;
- buffer[count] = ch;
- count = count + 1;
- }
- buffer[count] = 0;
-
- if (ch == '#')
- {
- ch = getDebugChar ();
- if (ch == -1)
- return 0;
- xmitcsum = hex(ch) << 4;
- ch = getDebugChar ();
- if (ch == -1)
- return 0;
- xmitcsum += hex(ch);
- if ((remote_debug ) && (checksum != xmitcsum))
- {
- fprintf(stderr,"bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
- checksum,xmitcsum,buffer);
- }
-
- if (checksum != xmitcsum)
- {
- /* failed checksum */
- if (! putDebugChar('-'))
- return 0;
- }
- 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)
- {
- fprintf (stderr, format, parm);
- fprintf (stderr, "\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 ();
-asm (".globl just_return");
-asm (".globl _just_return");
-asm ("just_return:");
-asm ("_just_return:");
-asm ("leave");
-asm ("ret");
-
-/* 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)
- char *mem;
- char *buf;
- int count;
- int may_fault;
-{
- int i;
- unsigned char ch;
-
- mem_may_fault = may_fault;
- for (i = 0; i < count; i++)
- {
- ch = get_char (mem++);
- 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;
- char *mem;
- int count;
- int may_fault;
-{
- int i;
- unsigned char ch;
-
- mem_may_fault = may_fault;
- for (i=0;i<count;i++)
- {
- ch = hex(*buf++) << 4;
- ch = ch + hex(*buf++);
- set_char (mem++, ch);
- if (may_fault && mem_err)
- return (mem);
- }
- 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);
-}
-
-/* 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 (T_StackFrame *old_frame)
-{
- T_TSS_StackFrame *frame = (T_TSS_StackFrame *) old_frame;
- int sigval;
- int addr, length;
- char * ptr;
- int newPC;
-
- /* Apparently the bell can sometimes be ringing at this point, and
- should be stopped. */
- StopBell ();
-
- if (remote_debug)
- {
- ConsolePrintf ("vector=%d: %s, sr=0x%x, pc=0x%x, thread=%d\r\n",
- frame->ExceptionNumber,
- frame->ExceptionDescription,
- frame->ExceptionSystemFlags,
- frame->ExceptionEIP,
- GetThreadID ());
- }
-
- /* 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. */
- if (frame->ExceptionNumber == START_NLM_EVENT
- && handle == NULL)
- {
- handle = ((struct DBG_LoadDefinitionStructure *)
- frame->ExceptionErrorCode);
- first_insn = *(char *) handle->LDInitializationProcedure;
- *(unsigned char *) handle->LDInitializationProcedure = 0xcc;
- return RETURN_TO_PROGRAM;
- }
-
- /* After we've reached the initial breakpoint, reset it. */
- if (frame->ExceptionEIP == (LONG) handle->LDInitializationProcedure + 1
- && *(unsigned char *) handle->LDInitializationProcedure == 0xcc)
- {
- *(char *) handle->LDInitializationProcedure = first_insn;
- frame->ExceptionEIP = (LONG) handle->LDInitializationProcedure;
- }
-
- /* Pass some events on to the next debugger, in case it will handle
- them. */
- if (frame->ExceptionNumber == ENTER_DEBUGGER_EVENT
- || frame->ExceptionNumber == KEYBOARD_BREAK_EVENT)
- return RETURN_TO_NEXT_DEBUGGER;
-
- /* At the moment, we don't care about most of the unusual NetWare
- exceptions. */
- if (frame->ExceptionNumber != TERMINATE_NLM_EVENT
- && frame->ExceptionNumber > 31)
- return RETURN_TO_PROGRAM;
-
- /* 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->ExceptionNumber == 11
- || frame->ExceptionNumber == 13
- || frame->ExceptionNumber == 14)
- && ((frame->ExceptionEIP >= (long) &set_char
- && frame->ExceptionEIP < (long) &set_char + 50)
- || (frame->ExceptionEIP >= (long) &get_char
- && frame->ExceptionEIP < (long) &get_char + 50)))
- {
- mem_err = 1;
- /* Point the instruction pointer at an assembly language stub
- which just returns from the function. */
- frame->ExceptionEIP = (long) &just_return;
- /* 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;
- }
-
- /* 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. */
-
- frame_to_registers (frame, registers);
-
- /* reply to host that an exception has occurred */
- if (frame->ExceptionNumber == TERMINATE_NLM_EVENT)
- {
- /* There is no way to get the exit status. */
- remcomOutBuffer[0] = 'W';
- remcomOutBuffer[1] = hexchars[0];
- remcomOutBuffer[2] = hexchars[0];
- remcomOutBuffer[3] = 0;
- }
- else
- {
- sigval = computeSignal (frame->ExceptionNumber);
- remcomOutBuffer[0] = 'N';
- remcomOutBuffer[1] = hexchars[sigval >> 4];
- remcomOutBuffer[2] = hexchars[sigval % 16];
- sprintf (remcomOutBuffer + 3, "0x%x;0x%x;0x%x",
- handle->LDCodeImageOffset,
- handle->LDDataImageOffset,
- handle->LDDataImageOffset + handle->LDDataImageLength);
- }
-
- 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;
- talking = 1;
- switch (remcomInBuffer[0])
- {
- case '?':
- sigval = computeSignal (frame->ExceptionNumber);
- remcomOutBuffer[0] = 'N';
- remcomOutBuffer[1] = hexchars[sigval >> 4];
- remcomOutBuffer[2] = hexchars[sigval % 16];
- sprintf (remcomOutBuffer + 3, "0x%x;0x%x;0x%x",
- handle->LDCodeImageOffset,
- handle->LDDataImageOffset,
- handle->LDDataImageOffset + handle->LDDataImageLength);
- break;
- case 'd':
- remote_debug = !(remote_debug); /* toggle debug flag */
- break;
- case 'g':
- /* return the value of the CPU registers */
- mem2hex((char*) registers, remcomOutBuffer, NUMREGBYTES, 0);
- break;
- case 'G':
- /* set the value of the CPU registers - return OK */
- hex2mem(&remcomInBuffer[1], (char*) registers, NUMREGBYTES, 0);
- 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 ] = addr;
-
- newPC = registers[ PC];
-
- /* clear the trace bit */
- registers[ PS ] &= 0xfffffeff;
-
- /* set the trace bit if we're stepping */
- if (remcomInBuffer[0] == 's') registers[ PS ] |= 0x100;
-
- registers_to_frame (registers, frame);
- return RETURN_TO_PROGRAM;
-
- case 'k':
- /* kill the program */
- KillMe (handle);
- ResumeThread (mainthread);
- return RETURN_TO_PROGRAM;
- }
-
- /* reply to the request */
- if (! putpacket(remcomOutBuffer))
- return RETURN_TO_NEXT_DEBUGGER;
- }
-}
-
-/* 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;
-
- /* Create a screen for the debugger. */
- console_screen = CreateScreen ("System Console", 0);
- if (DisplayScreen (console_screen) != ESUCCESS)
- fprintf (stderr, "DisplayScreen failed\n");
-
- if (argc < 4)
- {
- fprintf (stderr,
- "Usage: load gdbserver 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_SUCCESS)
- {
- fprintf (stderr, "Could not configure port: %d\n", err);
- AIOReleasePort (AIOhandle);
- exit (1);
- }
-
- /* Register ourselves as an alternate debugger. */
- memset (&s, 0, sizeof s);
- s.DDSResourceTag = ((struct ResourceTagStructure *)
- AllocateResourceTag (GetNLMHandle (),
- "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 ();
- handle = NULL;
- talking = 0;
-
- if (remote_debug > 0)
- ConsolePrintf ("About to call LoadModule with \"%s\" %d %d\r\n",
- cmdlin, console_screen, __GetScreenID (console_screen));
-
- /* Start up the module to be debugged. */
- err = LoadModule ((struct ScreenStruct *) __GetScreenID (console_screen),
- 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 (%d)\r\n", mainthread);
- SuspendThread (mainthread);
- if (remote_debug > 0)
- ConsolePrintf ("Resuming main thread (%d)\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);
-}
projects / deliverable / binutils-gdb.git / blobdiff