From 071ea11e85eb9d529cc5eb3d35f6247466a21b99 Mon Sep 17 00:00:00 2001 From: Stan Shebs Date: Fri, 16 Apr 1999 01:34:07 +0000 Subject: Initial creation of sourceware repository --- gdb/i386-stub.c | 911 -------------------------------------------------------- 1 file changed, 911 deletions(-) delete mode 100644 gdb/i386-stub.c (limited to 'gdb/i386-stub.c') diff --git a/gdb/i386-stub.c b/gdb/i386-stub.c deleted file mode 100644 index 7f65316..0000000 --- a/gdb/i386-stub.c +++ /dev/null @@ -1,911 +0,0 @@ -/**************************************************************************** - - 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. - -****************************************************************************/ - -/**************************************************************************** - * Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $ - * - * Module name: remcom.c $ - * Revision: 1.34 $ - * Date: 91/03/09 12:29:49 $ - * Contributor: Lake Stevens Instrument Division$ - * - * Description: low level support for gdb debugger. $ - * - * Considerations: only works on target hardware $ - * - * Written by: Glenn Engel $ - * ModuleState: Experimental $ - * - * NOTES: See Below $ - * - * Modified for 386 by Jim Kingdon, Cygnus Support. - * - * To enable debugger support, two things need to happen. One, a - * call to set_debug_traps() is necessary in order to allow any breakpoints - * or error conditions to be properly intercepted and reported to gdb. - * Two, a breakpoint needs to be generated to begin communication. This - * is most easily accomplished by a call to breakpoint(). Breakpoint() - * simulates a breakpoint by executing a trap #1. - * - * The external function exceptionHandler() is - * used to attach a specific handler to a specific 386 vector number. - * It should use the same privilege level it runs at. It should - * install it as an interrupt gate so that interrupts are masked - * while the handler runs. - * Also, need to assign exceptionHook and oldExceptionHook. - * - * Because gdb will sometimes write to the stack area to execute function - * calls, this program cannot rely on using the supervisor stack so it - * uses it's own stack area reserved in the int array remcomStack. - * - ************* - * - * 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 - * - * $#. - * - * where - * :: - * :: < two hex digits computed as modulo 256 sum of > - * - * 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 -#include -#include "ansidecl.h" - -/************************************************************************ - * - * external low-level support routines - */ -typedef void (*ExceptionHook)(int); /* pointer to function with int parm */ -typedef void (*Function)(); /* pointer to a function */ - -extern putDebugChar(); /* write a single character */ -extern getDebugChar(); /* read and return a single char */ - -extern Function exceptionHandler(); /* assign an exception handler */ -extern ExceptionHook exceptionHook; /* hook variable for errors/exceptions */ - -/************************************************************************/ -/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/ -/* at least NUMREGBYTES*2 are needed for register packets */ -#define BUFMAX 400 - -static char initialized; /* boolean flag. != 0 means we've been initialized */ - -int remote_debug; -/* debug > 0 prints ill-formed commands in valid packets & checksum errors */ - -void waitabit(); - -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}; - -/* - * these should not be static cuz they can be used outside this module - */ -int registers[NUMREGBYTES/4]; - -#define STACKSIZE 10000 -int remcomStack[STACKSIZE/sizeof(int)]; -static int* stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1]; - -/* - * In many cases, the system will want to continue exception processing - * when a continue command is given. - * oldExceptionHook is a function to invoke in this case. - */ - -static ExceptionHook oldExceptionHook; - -/*************************** ASSEMBLY CODE MACROS *************************/ -/* */ - -extern void -return_to_prog PARAMS ((void)); - -/* Restore the program's registers (including the stack pointer, which - means we get the right stack and don't have to worry about popping our - return address and any stack frames and so on) and return. */ -asm(".text"); -asm(".globl _return_to_prog"); -asm("_return_to_prog:"); -asm(" movw _registers+44, %ss"); -asm(" movl _registers+16, %esp"); -asm(" movl _registers+4, %ecx"); -asm(" movl _registers+8, %edx"); -asm(" movl _registers+12, %ebx"); -asm(" movl _registers+20, %ebp"); -asm(" movl _registers+24, %esi"); -asm(" movl _registers+28, %edi"); -asm(" movw _registers+48, %ds"); -asm(" movw _registers+52, %es"); -asm(" movw _registers+56, %fs"); -asm(" movw _registers+60, %gs"); -asm(" movl _registers+36, %eax"); -asm(" pushl %eax"); /* saved eflags */ -asm(" movl _registers+40, %eax"); -asm(" pushl %eax"); /* saved cs */ -asm(" movl _registers+32, %eax"); -asm(" pushl %eax"); /* saved eip */ -asm(" movl _registers, %eax"); -/* use iret to restore pc and flags together so - that trace flag works right. */ -asm(" iret"); - -#define BREAKPOINT() asm(" int $3"); - -/* Put the error code here just in case the user cares. */ -int gdb_i386errcode; -/* Likewise, the vector number here (since GDB only gets the signal - number through the usual means, and that's not very specific). */ -int gdb_i386vector = -1; - -/* GDB stores segment registers in 32-bit words (that's just the way - m-i386v.h is written). So zero the appropriate areas in registers. */ -#define SAVE_REGISTERS1() \ - asm ("movl %eax, _registers"); \ - asm ("movl %ecx, _registers+4"); \ - asm ("movl %edx, _registers+8"); \ - asm ("movl %ebx, _registers+12"); \ - asm ("movl %ebp, _registers+20"); \ - asm ("movl %esi, _registers+24"); \ - asm ("movl %edi, _registers+28"); \ - asm ("movw $0, %ax"); \ - asm ("movw %ds, _registers+48"); \ - asm ("movw %ax, _registers+50"); \ - asm ("movw %es, _registers+52"); \ - asm ("movw %ax, _registers+54"); \ - asm ("movw %fs, _registers+56"); \ - asm ("movw %ax, _registers+58"); \ - asm ("movw %gs, _registers+60"); \ - asm ("movw %ax, _registers+62"); -#define SAVE_ERRCODE() \ - asm ("popl %ebx"); \ - asm ("movl %ebx, _gdb_i386errcode"); -#define SAVE_REGISTERS2() \ - asm ("popl %ebx"); /* old eip */ \ - asm ("movl %ebx, _registers+32"); \ - asm ("popl %ebx"); /* old cs */ \ - asm ("movl %ebx, _registers+40"); \ - asm ("movw %ax, _registers+42"); \ - asm ("popl %ebx"); /* old eflags */ \ - asm ("movl %ebx, _registers+36"); \ - /* Now that we've done the pops, we can save the stack pointer."); */ \ - asm ("movw %ss, _registers+44"); \ - asm ("movw %ax, _registers+46"); \ - asm ("movl %esp, _registers+16"); - -/* See if mem_fault_routine is set, if so just IRET to that address. */ -#define CHECK_FAULT() \ - asm ("cmpl $0, _mem_fault_routine"); \ - asm ("jne mem_fault"); - -asm ("mem_fault:"); -/* OK to clobber temp registers; we're just going to end up in set_mem_err. */ -/* Pop error code from the stack and save it. */ -asm (" popl %eax"); -asm (" movl %eax, _gdb_i386errcode"); - -asm (" popl %eax"); /* eip */ -/* We don't want to return there, we want to return to the function - pointed to by mem_fault_routine instead. */ -asm (" movl _mem_fault_routine, %eax"); -asm (" popl %ecx"); /* cs (low 16 bits; junk in hi 16 bits). */ -asm (" popl %edx"); /* eflags */ - -/* Remove this stack frame; when we do the iret, we will be going to - the start of a function, so we want the stack to look just like it - would after a "call" instruction. */ -asm (" leave"); - -/* Push the stuff that iret wants. */ -asm (" pushl %edx"); /* eflags */ -asm (" pushl %ecx"); /* cs */ -asm (" pushl %eax"); /* eip */ - -/* Zero mem_fault_routine. */ -asm (" movl $0, %eax"); -asm (" movl %eax, _mem_fault_routine"); - -asm ("iret"); - -#define CALL_HOOK() asm("call _remcomHandler"); - -/* This function is called when a i386 exception occurs. It saves - * all the cpu regs in the _registers array, munges the stack a bit, - * and invokes an exception handler (remcom_handler). - * - * stack on entry: stack on exit: - * old eflags vector number - * old cs (zero-filled to 32 bits) - * old eip - * - */ -extern void _catchException3(); -asm(".text"); -asm(".globl __catchException3"); -asm("__catchException3:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $3"); -CALL_HOOK(); - -/* Same thing for exception 1. */ -extern void _catchException1(); -asm(".text"); -asm(".globl __catchException1"); -asm("__catchException1:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $1"); -CALL_HOOK(); - -/* Same thing for exception 0. */ -extern void _catchException0(); -asm(".text"); -asm(".globl __catchException0"); -asm("__catchException0:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $0"); -CALL_HOOK(); - -/* Same thing for exception 4. */ -extern void _catchException4(); -asm(".text"); -asm(".globl __catchException4"); -asm("__catchException4:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $4"); -CALL_HOOK(); - -/* Same thing for exception 5. */ -extern void _catchException5(); -asm(".text"); -asm(".globl __catchException5"); -asm("__catchException5:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $5"); -CALL_HOOK(); - -/* Same thing for exception 6. */ -extern void _catchException6(); -asm(".text"); -asm(".globl __catchException6"); -asm("__catchException6:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $6"); -CALL_HOOK(); - -/* Same thing for exception 7. */ -extern void _catchException7(); -asm(".text"); -asm(".globl __catchException7"); -asm("__catchException7:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $7"); -CALL_HOOK(); - -/* Same thing for exception 8. */ -extern void _catchException8(); -asm(".text"); -asm(".globl __catchException8"); -asm("__catchException8:"); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $8"); -CALL_HOOK(); - -/* Same thing for exception 9. */ -extern void _catchException9(); -asm(".text"); -asm(".globl __catchException9"); -asm("__catchException9:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $9"); -CALL_HOOK(); - -/* Same thing for exception 10. */ -extern void _catchException10(); -asm(".text"); -asm(".globl __catchException10"); -asm("__catchException10:"); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $10"); -CALL_HOOK(); - -/* Same thing for exception 12. */ -extern void _catchException12(); -asm(".text"); -asm(".globl __catchException12"); -asm("__catchException12:"); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $12"); -CALL_HOOK(); - -/* Same thing for exception 16. */ -extern void _catchException16(); -asm(".text"); -asm(".globl __catchException16"); -asm("__catchException16:"); -SAVE_REGISTERS1(); -SAVE_REGISTERS2(); -asm ("pushl $16"); -CALL_HOOK(); - -/* For 13, 11, and 14 we have to deal with the CHECK_FAULT stuff. */ - -/* Same thing for exception 13. */ -extern void _catchException13 (); -asm (".text"); -asm (".globl __catchException13"); -asm ("__catchException13:"); -CHECK_FAULT(); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $13"); -CALL_HOOK(); - -/* Same thing for exception 11. */ -extern void _catchException11 (); -asm (".text"); -asm (".globl __catchException11"); -asm ("__catchException11:"); -CHECK_FAULT(); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $11"); -CALL_HOOK(); - -/* Same thing for exception 14. */ -extern void _catchException14 (); -asm (".text"); -asm (".globl __catchException14"); -asm ("__catchException14:"); -CHECK_FAULT(); -SAVE_REGISTERS1(); -SAVE_ERRCODE(); -SAVE_REGISTERS2(); -asm ("pushl $14"); -CALL_HOOK(); - -/* - * remcomHandler is a front end for handle_exception. It moves the - * stack pointer into an area reserved for debugger use. - */ -asm("_remcomHandler:"); -asm(" popl %eax"); /* pop off return address */ -asm(" popl %eax"); /* get the exception number */ -asm(" movl _stackPtr, %esp"); /* move to remcom stack area */ -asm(" pushl %eax"); /* push exception onto stack */ -asm(" call _handle_exception"); /* this never returns */ - -void _returnFromException() -{ - return_to_prog (); -} - -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 $# */ -void getpacket(buffer) -char * buffer; -{ - unsigned char checksum; - unsigned char xmitcsum; - int i; - int count; - char ch; - - do { - /* wait around for the start character, ignore all other characters */ - while ((ch = getDebugChar()) != '$'); - checksum = 0; - xmitcsum = -1; - - count = 0; - - /* now, read until a # or end of buffer is found */ - while (count < BUFMAX) { - ch = getDebugChar(); - if (ch == '#') break; - checksum = checksum + ch; - buffer[count] = ch; - count = count + 1; - } - buffer[count] = 0; - - if (ch == '#') { - xmitcsum = hex(getDebugChar()) << 4; - xmitcsum += hex(getDebugChar()); - 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) putDebugChar('-'); /* failed checksum */ - else { - putDebugChar('+'); /* successful transfer */ - /* if a sequence char is present, reply the sequence ID */ - if (buffer[2] == ':') { - putDebugChar( buffer[0] ); - putDebugChar( buffer[1] ); - /* remove sequence chars from buffer */ - count = strlen(buffer); - for (i=3; i <= count; i++) buffer[i-3] = buffer[i]; - } - } - } - } while (checksum != xmitcsum); - -} - -/* send the packet in buffer. */ - - -void putpacket(buffer) -char * buffer; -{ - unsigned char checksum; - int count; - char ch; - - /* $#. */ - do { - putDebugChar('$'); - checksum = 0; - count = 0; - - while (ch=buffer[count]) { - if (! putDebugChar(ch)) return; - checksum += ch; - count += 1; - } - - putDebugChar('#'); - putDebugChar(hexchars[checksum >> 4]); - putDebugChar(hexchars[checksum % 16]); - - } while (getDebugChar() != '+'); - -} - -char remcomInBuffer[BUFMAX]; -char remcomOutBuffer[BUFMAX]; -static short error; - - -void debug_error(format, parm) -char * format; -char * parm; -{ - if (remote_debug) fprintf(stderr,format,parm); -} - -/* Address of a routine to RTE to if we get a memory fault. */ -static NORETURN void (*mem_fault_routine)() = NULL; - -/* Indicate to caller of mem2hex or hex2mem that there has been an - error. */ -static volatile int mem_err = 0; - -void -set_mem_err () -{ - mem_err = 1; -} - -/* 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). */ -int -get_char (addr) - char *addr; -{ - return *addr; -} - -void -set_char (addr, val) - char *addr; - int val; -{ - *addr = val; -} - -/* 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. */ -char* mem2hex(mem, buf, count, may_fault) -char* mem; -char* buf; -int count; -int may_fault; -{ - int i; - unsigned char ch; - - if (may_fault) - mem_fault_routine = set_mem_err; - for (i=0;i> 4]; - *buf++ = hexchars[ch % 16]; - } - *buf = 0; - if (may_fault) - mem_fault_routine = NULL; - 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 */ -char* hex2mem(buf, mem, count, may_fault) -char* buf; -char* mem; -int count; -int may_fault; -{ - int i; - unsigned char ch; - - if (may_fault) - mem_fault_routine = set_mem_err; - for (i=0;i=0) - { - *intValue = (*intValue <<4) | hexValue; - numChars ++; - } - else - break; - - (*ptr)++; - } - - return (numChars); -} - -/* - * This function does all command procesing for interfacing to gdb. - */ -void handle_exception(int exceptionVector) -{ - int sigval; - int addr, length; - char * ptr; - int newPC; - - gdb_i386vector = exceptionVector; - - if (remote_debug) printf("vector=%d, sr=0x%x, pc=0x%x\n", - exceptionVector, - registers[ PS ], - registers[ PC ]); - - /* reply to host that an exception has occurred */ - sigval = computeSignal( exceptionVector ); - remcomOutBuffer[0] = 'S'; - remcomOutBuffer[1] = hexchars[sigval >> 4]; - remcomOutBuffer[2] = hexchars[sigval % 16]; - remcomOutBuffer[3] = 0; - - putpacket(remcomOutBuffer); - - while (1==1) { - error = 0; - remcomOutBuffer[0] = 0; - getpacket(remcomInBuffer); - switch (remcomInBuffer[0]) { - case '?' : remcomOutBuffer[0] = 'S'; - remcomOutBuffer[1] = hexchars[sigval >> 4]; - remcomOutBuffer[2] = hexchars[sigval % 16]; - remcomOutBuffer[3] = 0; - 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; - - /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */ - case 'm' : - /* 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; - - /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */ - case 'M' : - /* 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; - - /* cAA..AA Continue at address AA..AA(optional) */ - /* sAA..AA Step one instruction from AA..AA(optional) */ - case 'c' : - case 's' : - /* 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; - - /* - * If we found a match for the PC AND we are not returning - * as a result of a breakpoint (33), - * trace exception (9), nmi (31), jmp to - * the old exception handler as if this code never ran. - */ -#if 0 - /* Don't really think we need this, except maybe for protection - exceptions. */ - /* - * invoke the previous handler. - */ - if (oldExceptionHook) - (*oldExceptionHook) (frame->exceptionVector); - newPC = registers[ PC ]; /* pc may have changed */ -#endif /* 0 */ - - _returnFromException(); /* this is a jump */ - - break; - - /* kill the program */ - case 'k' : /* do nothing */ - BREAKPOINT(); - break; - } /* switch */ - - /* reply to the request */ - putpacket(remcomOutBuffer); - } -} - -/* this function is used to set up exception handlers for tracing and - breakpoints */ -void set_debug_traps() -{ -extern void remcomHandler(); -int exception; - - stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1]; - - exceptionHandler (0, _catchException0); - exceptionHandler (1, _catchException1); - exceptionHandler (3, _catchException3); - exceptionHandler (4, _catchException4); - exceptionHandler (5, _catchException5); - exceptionHandler (6, _catchException6); - exceptionHandler (7, _catchException7); - exceptionHandler (8, _catchException8); - exceptionHandler (9, _catchException9); - exceptionHandler (10, _catchException10); - exceptionHandler (11, _catchException11); - exceptionHandler (12, _catchException12); - exceptionHandler (13, _catchException13); - exceptionHandler (14, _catchException14); - exceptionHandler (16, _catchException16); - - if (exceptionHook != remcomHandler) - { - oldExceptionHook = exceptionHook; - exceptionHook = remcomHandler; - } - - /* In case GDB is started before us, ack any packets (presumably - "$?#xx") sitting there. */ - putDebugChar ('+'); - - initialized = 1; - -} - -/* This function will generate a breakpoint exception. It is used at the - beginning of a program to sync up with a debugger and can be used - otherwise as a quick means to stop program execution and "break" into - the debugger. */ - -void breakpoint() -{ - if (initialized) -#if 0 - handle_exception(3); -#else - BREAKPOINT(); -#endif - waitabit(); -} - -int waitlimit = 1000000; - -#if 0 -void -bogon() -{ - waitabit(); -} -#endif - -void -waitabit() -{ - int i; - for (i = 0; i < waitlimit; i++) ; -} -- cgit v1.1