diff options
Diffstat (limited to 'gdb/i386-stub.c')
| -rw-r--r-- | gdb/i386-stub.c | 54 |
1 files changed, 7 insertions, 47 deletions
diff --git a/gdb/i386-stub.c b/gdb/i386-stub.c index d453fca..157779c 100644 --- a/gdb/i386-stub.c +++ b/gdb/i386-stub.c @@ -43,7 +43,6 @@ * 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 @@ -97,14 +96,10 @@ * * external low-level support routines */ -typedef void (*ExceptionHook)(int); /* pointer to function with int parm */ -typedef void (*Function)(); /* pointer to a function */ extern void putDebugChar(); /* write a single character */ extern int getDebugChar(); /* read and return a single char */ - -extern Function exceptionHandler(); /* assign an exception handler */ -extern ExceptionHook exceptionHook; /* hook variable for errors/exceptions */ +extern void exceptionHandler(); /* assign an exception handler */ /************************************************************************/ /* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/ @@ -138,14 +133,6 @@ int registers[NUMREGS]; 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 *************************/ /* */ @@ -456,12 +443,15 @@ char ch; return (-1); } +static char remcomInBuffer[BUFMAX]; +static char remcomOutBuffer[BUFMAX]; + /* scan for the sequence $<data>#<checksum> */ unsigned char * -getpacket (buffer) - unsigned char *buffer; +getpacket () { + unsigned char *buffer = &remcomInBuffer[0]; unsigned char checksum; unsigned char xmitcsum; int count; @@ -557,11 +547,6 @@ void putpacket(buffer) } -char remcomInBuffer[BUFMAX]; -char remcomOutBuffer[BUFMAX]; -static short error; - - void debug_error(format, parm) char * format; char * parm; @@ -739,9 +724,8 @@ void handle_exception(int exceptionVector) stepping = 0; while (1==1) { - error = 0; remcomOutBuffer[0] = 0; - ptr = getpacket(remcomInBuffer); + ptr = getpacket(); switch (*ptr++) { case '?' : remcomOutBuffer[0] = 'S'; @@ -839,25 +823,7 @@ void handle_exception(int exceptionVector) /* set the trace bit if we're stepping */ if (stepping) 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 */ @@ -900,12 +866,6 @@ int exception; exceptionHandler (14, _catchException14); exceptionHandler (16, _catchException16); - if (exceptionHook != remcomHandler) - { - oldExceptionHook = exceptionHook; - exceptionHook = remcomHandler; - } - initialized = 1; } |