/****************************************************************************
|
/****************************************************************************
|
|
|
THIS SOFTWARE IS NOT COPYRIGHTED
|
THIS SOFTWARE IS NOT COPYRIGHTED
|
|
|
HP offers the following for use in the public domain. HP makes no
|
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
|
warranty with regard to the software or it's performance and the
|
user accepts the software "AS IS" with all faults.
|
user accepts the software "AS IS" with all faults.
|
|
|
HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
|
HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
|
TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
****************************************************************************/
|
****************************************************************************/
|
|
|
/****************************************************************************
|
/****************************************************************************
|
* Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
|
* Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
|
*
|
*
|
* Module name: remcom.c $
|
* Module name: remcom.c $
|
* Revision: 1.34 $
|
* Revision: 1.34 $
|
* Date: 91/03/09 12:29:49 $
|
* Date: 91/03/09 12:29:49 $
|
* Contributor: Lake Stevens Instrument Division$
|
* Contributor: Lake Stevens Instrument Division$
|
*
|
*
|
* Description: low level support for gdb debugger. $
|
* Description: low level support for gdb debugger. $
|
*
|
*
|
* Considerations: only works on target hardware $
|
* Considerations: only works on target hardware $
|
*
|
*
|
* Written by: Glenn Engel $
|
* Written by: Glenn Engel $
|
* ModuleState: Experimental $
|
* ModuleState: Experimental $
|
*
|
*
|
* NOTES: See Below $
|
* NOTES: See Below $
|
*
|
*
|
* Modified for 386 by Jim Kingdon, Cygnus Support.
|
* Modified for 386 by Jim Kingdon, Cygnus Support.
|
*
|
*
|
* To enable debugger support, two things need to happen. One, a
|
* To enable debugger support, two things need to happen. One, a
|
* call to set_debug_traps() is necessary in order to allow any breakpoints
|
* call to set_debug_traps() is necessary in order to allow any breakpoints
|
* or error conditions to be properly intercepted and reported to gdb.
|
* or error conditions to be properly intercepted and reported to gdb.
|
* Two, a breakpoint needs to be generated to begin communication. This
|
* Two, a breakpoint needs to be generated to begin communication. This
|
* is most easily accomplished by a call to breakpoint(). Breakpoint()
|
* is most easily accomplished by a call to breakpoint(). Breakpoint()
|
* simulates a breakpoint by executing a trap #1.
|
* simulates a breakpoint by executing a trap #1.
|
*
|
*
|
* The external function exceptionHandler() is
|
* The external function exceptionHandler() is
|
* used to attach a specific handler to a specific 386 vector number.
|
* used to attach a specific handler to a specific 386 vector number.
|
* It should use the same privilege level it runs at. It should
|
* It should use the same privilege level it runs at. It should
|
* install it as an interrupt gate so that interrupts are masked
|
* install it as an interrupt gate so that interrupts are masked
|
* while the handler runs.
|
* while the handler runs.
|
*
|
*
|
* Because gdb will sometimes write to the stack area to execute function
|
* Because gdb will sometimes write to the stack area to execute function
|
* calls, this program cannot rely on using the supervisor stack so it
|
* calls, this program cannot rely on using the supervisor stack so it
|
* uses it's own stack area reserved in the int array remcomStack.
|
* uses it's own stack area reserved in the int array remcomStack.
|
*
|
*
|
*************
|
*************
|
*
|
*
|
* The following gdb commands are supported:
|
* The following gdb commands are supported:
|
*
|
*
|
* command function Return value
|
* command function Return value
|
*
|
*
|
* g return the value of the CPU registers hex data or ENN
|
* g return the value of the CPU registers hex data or ENN
|
* G set the value of the CPU registers OK 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 Read LLLL bytes at address AA..AA hex data or ENN
|
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
|
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
|
*
|
*
|
* c Resume at current address SNN ( signal NN)
|
* c Resume at current address SNN ( signal NN)
|
* cAA..AA Continue at address AA..AA SNN
|
* cAA..AA Continue at address AA..AA SNN
|
*
|
*
|
* s Step one instruction SNN
|
* s Step one instruction SNN
|
* sAA..AA Step one instruction from AA..AA SNN
|
* sAA..AA Step one instruction from AA..AA SNN
|
*
|
*
|
* k kill
|
* k kill
|
*
|
*
|
* ? What was the last sigval ? SNN (signal NN)
|
* ? What was the last sigval ? SNN (signal NN)
|
*
|
*
|
* All commands and responses are sent with a packet which includes a
|
* All commands and responses are sent with a packet which includes a
|
* checksum. A packet consists of
|
* checksum. A packet consists of
|
*
|
*
|
* $<packet info>#<checksum>.
|
* $<packet info>#<checksum>.
|
*
|
*
|
* where
|
* where
|
* <packet info> :: <characters representing the command or response>
|
* <packet info> :: <characters representing the command or response>
|
* <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
|
* <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
|
*
|
*
|
* When a packet is received, it is first acknowledged with either '+' or '-'.
|
* When a packet is received, it is first acknowledged with either '+' or '-'.
|
* '+' indicates a successful transfer. '-' indicates a failed transfer.
|
* '+' indicates a successful transfer. '-' indicates a failed transfer.
|
*
|
*
|
* Example:
|
* Example:
|
*
|
*
|
* Host: Reply:
|
* Host: Reply:
|
* $m0,10#2a +$00010203040506070809101112131415#42
|
* $m0,10#2a +$00010203040506070809101112131415#42
|
*
|
*
|
****************************************************************************/
|
****************************************************************************/
|
|
|
#include <stdio.h>
|
#include <stdio.h>
|
#include <string.h>
|
#include <string.h>
|
|
|
/************************************************************************
|
/************************************************************************
|
*
|
*
|
* external low-level support routines
|
* external low-level support routines
|
*/
|
*/
|
|
|
extern void putDebugChar(); /* write a single character */
|
extern void putDebugChar(); /* write a single character */
|
extern int getDebugChar(); /* read and return a single char */
|
extern int getDebugChar(); /* read and return a single char */
|
extern void exceptionHandler(); /* assign an exception handler */
|
extern void exceptionHandler(); /* assign an exception handler */
|
|
|
/************************************************************************/
|
/************************************************************************/
|
/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
|
/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
|
/* at least NUMREGBYTES*2 are needed for register packets */
|
/* at least NUMREGBYTES*2 are needed for register packets */
|
#define BUFMAX 400
|
#define BUFMAX 400
|
|
|
static char initialized; /* boolean flag. != 0 means we've been initialized */
|
static char initialized; /* boolean flag. != 0 means we've been initialized */
|
|
|
int remote_debug;
|
int remote_debug;
|
/* debug > 0 prints ill-formed commands in valid packets & checksum errors */
|
/* debug > 0 prints ill-formed commands in valid packets & checksum errors */
|
|
|
static const char hexchars[]="0123456789abcdef";
|
static const char hexchars[]="0123456789abcdef";
|
|
|
/* Number of registers. */
|
/* Number of registers. */
|
#define NUMREGS 16
|
#define NUMREGS 16
|
|
|
/* Number of bytes of registers. */
|
/* Number of bytes of registers. */
|
#define NUMREGBYTES (NUMREGS * 4)
|
#define NUMREGBYTES (NUMREGS * 4)
|
|
|
enum regnames {EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
|
enum regnames {EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
|
PC /* also known as eip */,
|
PC /* also known as eip */,
|
PS /* also known as eflags */,
|
PS /* also known as eflags */,
|
CS, SS, DS, ES, FS, GS};
|
CS, SS, DS, ES, FS, GS};
|
|
|
/*
|
/*
|
* these should not be static cuz they can be used outside this module
|
* these should not be static cuz they can be used outside this module
|
*/
|
*/
|
int registers[NUMREGS];
|
int registers[NUMREGS];
|
|
|
#define STACKSIZE 10000
|
#define STACKSIZE 10000
|
int remcomStack[STACKSIZE/sizeof(int)];
|
int remcomStack[STACKSIZE/sizeof(int)];
|
static int* stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
|
static int* stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
|
|
|
/*************************** ASSEMBLY CODE MACROS *************************/
|
/*************************** ASSEMBLY CODE MACROS *************************/
|
/* */
|
/* */
|
|
|
extern void
|
extern void
|
return_to_prog ();
|
return_to_prog ();
|
|
|
/* Restore the program's registers (including the stack pointer, which
|
/* 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
|
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. */
|
return address and any stack frames and so on) and return. */
|
asm(".text");
|
asm(".text");
|
asm(".globl _return_to_prog");
|
asm(".globl _return_to_prog");
|
asm("_return_to_prog:");
|
asm("_return_to_prog:");
|
asm(" movw _registers+44, %ss");
|
asm(" movw _registers+44, %ss");
|
asm(" movl _registers+16, %esp");
|
asm(" movl _registers+16, %esp");
|
asm(" movl _registers+4, %ecx");
|
asm(" movl _registers+4, %ecx");
|
asm(" movl _registers+8, %edx");
|
asm(" movl _registers+8, %edx");
|
asm(" movl _registers+12, %ebx");
|
asm(" movl _registers+12, %ebx");
|
asm(" movl _registers+20, %ebp");
|
asm(" movl _registers+20, %ebp");
|
asm(" movl _registers+24, %esi");
|
asm(" movl _registers+24, %esi");
|
asm(" movl _registers+28, %edi");
|
asm(" movl _registers+28, %edi");
|
asm(" movw _registers+48, %ds");
|
asm(" movw _registers+48, %ds");
|
asm(" movw _registers+52, %es");
|
asm(" movw _registers+52, %es");
|
asm(" movw _registers+56, %fs");
|
asm(" movw _registers+56, %fs");
|
asm(" movw _registers+60, %gs");
|
asm(" movw _registers+60, %gs");
|
asm(" movl _registers+36, %eax");
|
asm(" movl _registers+36, %eax");
|
asm(" pushl %eax"); /* saved eflags */
|
asm(" pushl %eax"); /* saved eflags */
|
asm(" movl _registers+40, %eax");
|
asm(" movl _registers+40, %eax");
|
asm(" pushl %eax"); /* saved cs */
|
asm(" pushl %eax"); /* saved cs */
|
asm(" movl _registers+32, %eax");
|
asm(" movl _registers+32, %eax");
|
asm(" pushl %eax"); /* saved eip */
|
asm(" pushl %eax"); /* saved eip */
|
asm(" movl _registers, %eax");
|
asm(" movl _registers, %eax");
|
/* use iret to restore pc and flags together so
|
/* use iret to restore pc and flags together so
|
that trace flag works right. */
|
that trace flag works right. */
|
asm(" iret");
|
asm(" iret");
|
|
|
#define BREAKPOINT() asm(" int $3");
|
#define BREAKPOINT() asm(" int $3");
|
|
|
/* Put the error code here just in case the user cares. */
|
/* Put the error code here just in case the user cares. */
|
int gdb_i386errcode;
|
int gdb_i386errcode;
|
/* Likewise, the vector number here (since GDB only gets the signal
|
/* Likewise, the vector number here (since GDB only gets the signal
|
number through the usual means, and that's not very specific). */
|
number through the usual means, and that's not very specific). */
|
int gdb_i386vector = -1;
|
int gdb_i386vector = -1;
|
|
|
/* GDB stores segment registers in 32-bit words (that's just the way
|
/* 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. */
|
m-i386v.h is written). So zero the appropriate areas in registers. */
|
#define SAVE_REGISTERS1() \
|
#define SAVE_REGISTERS1() \
|
asm ("movl %eax, _registers"); \
|
asm ("movl %eax, _registers"); \
|
asm ("movl %ecx, _registers+4"); \
|
asm ("movl %ecx, _registers+4"); \
|
asm ("movl %edx, _registers+8"); \
|
asm ("movl %edx, _registers+8"); \
|
asm ("movl %ebx, _registers+12"); \
|
asm ("movl %ebx, _registers+12"); \
|
asm ("movl %ebp, _registers+20"); \
|
asm ("movl %ebp, _registers+20"); \
|
asm ("movl %esi, _registers+24"); \
|
asm ("movl %esi, _registers+24"); \
|
asm ("movl %edi, _registers+28"); \
|
asm ("movl %edi, _registers+28"); \
|
asm ("movw $0, %ax"); \
|
asm ("movw $0, %ax"); \
|
asm ("movw %ds, _registers+48"); \
|
asm ("movw %ds, _registers+48"); \
|
asm ("movw %ax, _registers+50"); \
|
asm ("movw %ax, _registers+50"); \
|
asm ("movw %es, _registers+52"); \
|
asm ("movw %es, _registers+52"); \
|
asm ("movw %ax, _registers+54"); \
|
asm ("movw %ax, _registers+54"); \
|
asm ("movw %fs, _registers+56"); \
|
asm ("movw %fs, _registers+56"); \
|
asm ("movw %ax, _registers+58"); \
|
asm ("movw %ax, _registers+58"); \
|
asm ("movw %gs, _registers+60"); \
|
asm ("movw %gs, _registers+60"); \
|
asm ("movw %ax, _registers+62");
|
asm ("movw %ax, _registers+62");
|
#define SAVE_ERRCODE() \
|
#define SAVE_ERRCODE() \
|
asm ("popl %ebx"); \
|
asm ("popl %ebx"); \
|
asm ("movl %ebx, _gdb_i386errcode");
|
asm ("movl %ebx, _gdb_i386errcode");
|
#define SAVE_REGISTERS2() \
|
#define SAVE_REGISTERS2() \
|
asm ("popl %ebx"); /* old eip */ \
|
asm ("popl %ebx"); /* old eip */ \
|
asm ("movl %ebx, _registers+32"); \
|
asm ("movl %ebx, _registers+32"); \
|
asm ("popl %ebx"); /* old cs */ \
|
asm ("popl %ebx"); /* old cs */ \
|
asm ("movl %ebx, _registers+40"); \
|
asm ("movl %ebx, _registers+40"); \
|
asm ("movw %ax, _registers+42"); \
|
asm ("movw %ax, _registers+42"); \
|
asm ("popl %ebx"); /* old eflags */ \
|
asm ("popl %ebx"); /* old eflags */ \
|
asm ("movl %ebx, _registers+36"); \
|
asm ("movl %ebx, _registers+36"); \
|
/* Now that we've done the pops, we can save the stack pointer."); */ \
|
/* Now that we've done the pops, we can save the stack pointer."); */ \
|
asm ("movw %ss, _registers+44"); \
|
asm ("movw %ss, _registers+44"); \
|
asm ("movw %ax, _registers+46"); \
|
asm ("movw %ax, _registers+46"); \
|
asm ("movl %esp, _registers+16");
|
asm ("movl %esp, _registers+16");
|
|
|
/* See if mem_fault_routine is set, if so just IRET to that address. */
|
/* See if mem_fault_routine is set, if so just IRET to that address. */
|
#define CHECK_FAULT() \
|
#define CHECK_FAULT() \
|
asm ("cmpl $0, _mem_fault_routine"); \
|
asm ("cmpl $0, _mem_fault_routine"); \
|
asm ("jne mem_fault");
|
asm ("jne mem_fault");
|
|
|
asm (".text");
|
asm (".text");
|
asm ("mem_fault:");
|
asm ("mem_fault:");
|
/* OK to clobber temp registers; we're just going to end up in set_mem_err. */
|
/* 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. */
|
/* Pop error code from the stack and save it. */
|
asm (" popl %eax");
|
asm (" popl %eax");
|
asm (" movl %eax, _gdb_i386errcode");
|
asm (" movl %eax, _gdb_i386errcode");
|
|
|
asm (" popl %eax"); /* eip */
|
asm (" popl %eax"); /* eip */
|
/* We don't want to return there, we want to return to the function
|
/* We don't want to return there, we want to return to the function
|
pointed to by mem_fault_routine instead. */
|
pointed to by mem_fault_routine instead. */
|
asm (" movl _mem_fault_routine, %eax");
|
asm (" movl _mem_fault_routine, %eax");
|
asm (" popl %ecx"); /* cs (low 16 bits; junk in hi 16 bits). */
|
asm (" popl %ecx"); /* cs (low 16 bits; junk in hi 16 bits). */
|
asm (" popl %edx"); /* eflags */
|
asm (" popl %edx"); /* eflags */
|
|
|
/* Remove this stack frame; when we do the iret, we will be going to
|
/* 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
|
the start of a function, so we want the stack to look just like it
|
would after a "call" instruction. */
|
would after a "call" instruction. */
|
asm (" leave");
|
asm (" leave");
|
|
|
/* Push the stuff that iret wants. */
|
/* Push the stuff that iret wants. */
|
asm (" pushl %edx"); /* eflags */
|
asm (" pushl %edx"); /* eflags */
|
asm (" pushl %ecx"); /* cs */
|
asm (" pushl %ecx"); /* cs */
|
asm (" pushl %eax"); /* eip */
|
asm (" pushl %eax"); /* eip */
|
|
|
/* Zero mem_fault_routine. */
|
/* Zero mem_fault_routine. */
|
asm (" movl $0, %eax");
|
asm (" movl $0, %eax");
|
asm (" movl %eax, _mem_fault_routine");
|
asm (" movl %eax, _mem_fault_routine");
|
|
|
asm ("iret");
|
asm ("iret");
|
|
|
#define CALL_HOOK() asm("call _remcomHandler");
|
#define CALL_HOOK() asm("call _remcomHandler");
|
|
|
/* This function is called when a i386 exception occurs. It saves
|
/* This function is called when a i386 exception occurs. It saves
|
* all the cpu regs in the _registers array, munges the stack a bit,
|
* all the cpu regs in the _registers array, munges the stack a bit,
|
* and invokes an exception handler (remcom_handler).
|
* and invokes an exception handler (remcom_handler).
|
*
|
*
|
* stack on entry: stack on exit:
|
* stack on entry: stack on exit:
|
* old eflags vector number
|
* old eflags vector number
|
* old cs (zero-filled to 32 bits)
|
* old cs (zero-filled to 32 bits)
|
* old eip
|
* old eip
|
*
|
*
|
*/
|
*/
|
extern void _catchException3();
|
extern void _catchException3();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException3");
|
asm(".globl __catchException3");
|
asm("__catchException3:");
|
asm("__catchException3:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $3");
|
asm ("pushl $3");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 1. */
|
/* Same thing for exception 1. */
|
extern void _catchException1();
|
extern void _catchException1();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException1");
|
asm(".globl __catchException1");
|
asm("__catchException1:");
|
asm("__catchException1:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $1");
|
asm ("pushl $1");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 0. */
|
/* Same thing for exception 0. */
|
extern void _catchException0();
|
extern void _catchException0();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException0");
|
asm(".globl __catchException0");
|
asm("__catchException0:");
|
asm("__catchException0:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $0");
|
asm ("pushl $0");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 4. */
|
/* Same thing for exception 4. */
|
extern void _catchException4();
|
extern void _catchException4();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException4");
|
asm(".globl __catchException4");
|
asm("__catchException4:");
|
asm("__catchException4:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $4");
|
asm ("pushl $4");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 5. */
|
/* Same thing for exception 5. */
|
extern void _catchException5();
|
extern void _catchException5();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException5");
|
asm(".globl __catchException5");
|
asm("__catchException5:");
|
asm("__catchException5:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $5");
|
asm ("pushl $5");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 6. */
|
/* Same thing for exception 6. */
|
extern void _catchException6();
|
extern void _catchException6();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException6");
|
asm(".globl __catchException6");
|
asm("__catchException6:");
|
asm("__catchException6:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $6");
|
asm ("pushl $6");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 7. */
|
/* Same thing for exception 7. */
|
extern void _catchException7();
|
extern void _catchException7();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException7");
|
asm(".globl __catchException7");
|
asm("__catchException7:");
|
asm("__catchException7:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $7");
|
asm ("pushl $7");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 8. */
|
/* Same thing for exception 8. */
|
extern void _catchException8();
|
extern void _catchException8();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException8");
|
asm(".globl __catchException8");
|
asm("__catchException8:");
|
asm("__catchException8:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $8");
|
asm ("pushl $8");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 9. */
|
/* Same thing for exception 9. */
|
extern void _catchException9();
|
extern void _catchException9();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException9");
|
asm(".globl __catchException9");
|
asm("__catchException9:");
|
asm("__catchException9:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $9");
|
asm ("pushl $9");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 10. */
|
/* Same thing for exception 10. */
|
extern void _catchException10();
|
extern void _catchException10();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException10");
|
asm(".globl __catchException10");
|
asm("__catchException10:");
|
asm("__catchException10:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $10");
|
asm ("pushl $10");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 12. */
|
/* Same thing for exception 12. */
|
extern void _catchException12();
|
extern void _catchException12();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException12");
|
asm(".globl __catchException12");
|
asm("__catchException12:");
|
asm("__catchException12:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $12");
|
asm ("pushl $12");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 16. */
|
/* Same thing for exception 16. */
|
extern void _catchException16();
|
extern void _catchException16();
|
asm(".text");
|
asm(".text");
|
asm(".globl __catchException16");
|
asm(".globl __catchException16");
|
asm("__catchException16:");
|
asm("__catchException16:");
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $16");
|
asm ("pushl $16");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* For 13, 11, and 14 we have to deal with the CHECK_FAULT stuff. */
|
/* For 13, 11, and 14 we have to deal with the CHECK_FAULT stuff. */
|
|
|
/* Same thing for exception 13. */
|
/* Same thing for exception 13. */
|
extern void _catchException13 ();
|
extern void _catchException13 ();
|
asm (".text");
|
asm (".text");
|
asm (".globl __catchException13");
|
asm (".globl __catchException13");
|
asm ("__catchException13:");
|
asm ("__catchException13:");
|
CHECK_FAULT();
|
CHECK_FAULT();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $13");
|
asm ("pushl $13");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 11. */
|
/* Same thing for exception 11. */
|
extern void _catchException11 ();
|
extern void _catchException11 ();
|
asm (".text");
|
asm (".text");
|
asm (".globl __catchException11");
|
asm (".globl __catchException11");
|
asm ("__catchException11:");
|
asm ("__catchException11:");
|
CHECK_FAULT();
|
CHECK_FAULT();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $11");
|
asm ("pushl $11");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/* Same thing for exception 14. */
|
/* Same thing for exception 14. */
|
extern void _catchException14 ();
|
extern void _catchException14 ();
|
asm (".text");
|
asm (".text");
|
asm (".globl __catchException14");
|
asm (".globl __catchException14");
|
asm ("__catchException14:");
|
asm ("__catchException14:");
|
CHECK_FAULT();
|
CHECK_FAULT();
|
SAVE_REGISTERS1();
|
SAVE_REGISTERS1();
|
SAVE_ERRCODE();
|
SAVE_ERRCODE();
|
SAVE_REGISTERS2();
|
SAVE_REGISTERS2();
|
asm ("pushl $14");
|
asm ("pushl $14");
|
CALL_HOOK();
|
CALL_HOOK();
|
|
|
/*
|
/*
|
* remcomHandler is a front end for handle_exception. It moves the
|
* remcomHandler is a front end for handle_exception. It moves the
|
* stack pointer into an area reserved for debugger use.
|
* stack pointer into an area reserved for debugger use.
|
*/
|
*/
|
asm("_remcomHandler:");
|
asm("_remcomHandler:");
|
asm(" popl %eax"); /* pop off return address */
|
asm(" popl %eax"); /* pop off return address */
|
asm(" popl %eax"); /* get the exception number */
|
asm(" popl %eax"); /* get the exception number */
|
asm(" movl _stackPtr, %esp"); /* move to remcom stack area */
|
asm(" movl _stackPtr, %esp"); /* move to remcom stack area */
|
asm(" pushl %eax"); /* push exception onto stack */
|
asm(" pushl %eax"); /* push exception onto stack */
|
asm(" call _handle_exception"); /* this never returns */
|
asm(" call _handle_exception"); /* this never returns */
|
|
|
void _returnFromException()
|
void _returnFromException()
|
{
|
{
|
return_to_prog ();
|
return_to_prog ();
|
}
|
}
|
|
|
int hex(ch)
|
int hex(ch)
|
char ch;
|
char ch;
|
{
|
{
|
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
|
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
|
if ((ch >= '0') && (ch <= '9')) return (ch-'0');
|
if ((ch >= '0') && (ch <= '9')) return (ch-'0');
|
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
|
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
static char remcomInBuffer[BUFMAX];
|
static char remcomInBuffer[BUFMAX];
|
static char remcomOutBuffer[BUFMAX];
|
static char remcomOutBuffer[BUFMAX];
|
|
|
/* scan for the sequence $<data>#<checksum> */
|
/* scan for the sequence $<data>#<checksum> */
|
|
|
unsigned char *
|
unsigned char *
|
getpacket ()
|
getpacket ()
|
{
|
{
|
unsigned char *buffer = &remcomInBuffer[0];
|
unsigned char *buffer = &remcomInBuffer[0];
|
unsigned char checksum;
|
unsigned char checksum;
|
unsigned char xmitcsum;
|
unsigned char xmitcsum;
|
int count;
|
int count;
|
char ch;
|
char ch;
|
|
|
while (1)
|
while (1)
|
{
|
{
|
/* wait around for the start character, ignore all other characters */
|
/* wait around for the start character, ignore all other characters */
|
while ((ch = getDebugChar ()) != '$')
|
while ((ch = getDebugChar ()) != '$')
|
;
|
;
|
|
|
retry:
|
retry:
|
checksum = 0;
|
checksum = 0;
|
xmitcsum = -1;
|
xmitcsum = -1;
|
count = 0;
|
count = 0;
|
|
|
/* now, read until a # or end of buffer is found */
|
/* now, read until a # or end of buffer is found */
|
while (count < BUFMAX)
|
while (count < BUFMAX)
|
{
|
{
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
if (ch == '$')
|
if (ch == '$')
|
goto retry;
|
goto retry;
|
if (ch == '#')
|
if (ch == '#')
|
break;
|
break;
|
checksum = checksum + ch;
|
checksum = checksum + ch;
|
buffer[count] = ch;
|
buffer[count] = ch;
|
count = count + 1;
|
count = count + 1;
|
}
|
}
|
buffer[count] = 0;
|
buffer[count] = 0;
|
|
|
if (ch == '#')
|
if (ch == '#')
|
{
|
{
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
xmitcsum = hex (ch) << 4;
|
xmitcsum = hex (ch) << 4;
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
xmitcsum += hex (ch);
|
xmitcsum += hex (ch);
|
|
|
if (checksum != xmitcsum)
|
if (checksum != xmitcsum)
|
{
|
{
|
if (remote_debug)
|
if (remote_debug)
|
{
|
{
|
fprintf (stderr,
|
fprintf (stderr,
|
"bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
|
"bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
|
checksum, xmitcsum, buffer);
|
checksum, xmitcsum, buffer);
|
}
|
}
|
putDebugChar ('-'); /* failed checksum */
|
putDebugChar ('-'); /* failed checksum */
|
}
|
}
|
else
|
else
|
{
|
{
|
putDebugChar ('+'); /* successful transfer */
|
putDebugChar ('+'); /* successful transfer */
|
|
|
/* if a sequence char is present, reply the sequence ID */
|
/* if a sequence char is present, reply the sequence ID */
|
if (buffer[2] == ':')
|
if (buffer[2] == ':')
|
{
|
{
|
putDebugChar (buffer[0]);
|
putDebugChar (buffer[0]);
|
putDebugChar (buffer[1]);
|
putDebugChar (buffer[1]);
|
|
|
return &buffer[3];
|
return &buffer[3];
|
}
|
}
|
|
|
return &buffer[0];
|
return &buffer[0];
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* send the packet in buffer. */
|
/* send the packet in buffer. */
|
|
|
void putpacket(buffer)
|
void putpacket(buffer)
|
unsigned char *buffer;
|
unsigned char *buffer;
|
{
|
{
|
unsigned char checksum;
|
unsigned char checksum;
|
int count;
|
int count;
|
char ch;
|
char ch;
|
|
|
/* $<packet info>#<checksum>. */
|
/* $<packet info>#<checksum>. */
|
do {
|
do {
|
putDebugChar('$');
|
putDebugChar('$');
|
checksum = 0;
|
checksum = 0;
|
count = 0;
|
count = 0;
|
|
|
while (ch=buffer[count]) {
|
while (ch=buffer[count]) {
|
putDebugChar(ch);
|
putDebugChar(ch);
|
checksum += ch;
|
checksum += ch;
|
count += 1;
|
count += 1;
|
}
|
}
|
|
|
putDebugChar('#');
|
putDebugChar('#');
|
putDebugChar(hexchars[checksum >> 4]);
|
putDebugChar(hexchars[checksum >> 4]);
|
putDebugChar(hexchars[checksum % 16]);
|
putDebugChar(hexchars[checksum % 16]);
|
|
|
} while (getDebugChar() != '+');
|
} while (getDebugChar() != '+');
|
|
|
}
|
}
|
|
|
void debug_error(format, parm)
|
void debug_error(format, parm)
|
char * format;
|
char * format;
|
char * parm;
|
char * parm;
|
{
|
{
|
if (remote_debug) fprintf (stderr,format,parm);
|
if (remote_debug) fprintf (stderr,format,parm);
|
}
|
}
|
|
|
/* Address of a routine to RTE to if we get a memory fault. */
|
/* Address of a routine to RTE to if we get a memory fault. */
|
static void (*volatile mem_fault_routine)() = NULL;
|
static void (*volatile mem_fault_routine)() = NULL;
|
|
|
/* Indicate to caller of mem2hex or hex2mem that there has been an
|
/* Indicate to caller of mem2hex or hex2mem that there has been an
|
error. */
|
error. */
|
static volatile int mem_err = 0;
|
static volatile int mem_err = 0;
|
|
|
void
|
void
|
set_mem_err ()
|
set_mem_err ()
|
{
|
{
|
mem_err = 1;
|
mem_err = 1;
|
}
|
}
|
|
|
/* These are separate functions so that they are so short and sweet
|
/* 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
|
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
|
to mem_fault, they won't get restored, so there better not be any
|
saved). */
|
saved). */
|
int
|
int
|
get_char (addr)
|
get_char (addr)
|
char *addr;
|
char *addr;
|
{
|
{
|
return *addr;
|
return *addr;
|
}
|
}
|
|
|
void
|
void
|
set_char (addr, val)
|
set_char (addr, val)
|
char *addr;
|
char *addr;
|
int val;
|
int val;
|
{
|
{
|
*addr = val;
|
*addr = val;
|
}
|
}
|
|
|
/* convert the memory pointed to by mem into hex, placing result in buf */
|
/* convert the memory pointed to by mem into hex, placing result in buf */
|
/* return a pointer to the last char put in buf (null) */
|
/* 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
|
/* 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. */
|
a fault; if zero treat a fault like any other fault in the stub. */
|
char* mem2hex(mem, buf, count, may_fault)
|
char* mem2hex(mem, buf, count, may_fault)
|
char* mem;
|
char* mem;
|
char* buf;
|
char* buf;
|
int count;
|
int count;
|
int may_fault;
|
int may_fault;
|
{
|
{
|
int i;
|
int i;
|
unsigned char ch;
|
unsigned char ch;
|
|
|
if (may_fault)
|
if (may_fault)
|
mem_fault_routine = set_mem_err;
|
mem_fault_routine = set_mem_err;
|
for (i=0;i<count;i++) {
|
for (i=0;i<count;i++) {
|
ch = get_char (mem++);
|
ch = get_char (mem++);
|
if (may_fault && mem_err)
|
if (may_fault && mem_err)
|
return (buf);
|
return (buf);
|
*buf++ = hexchars[ch >> 4];
|
*buf++ = hexchars[ch >> 4];
|
*buf++ = hexchars[ch % 16];
|
*buf++ = hexchars[ch % 16];
|
}
|
}
|
*buf = 0;
|
*buf = 0;
|
if (may_fault)
|
if (may_fault)
|
mem_fault_routine = NULL;
|
mem_fault_routine = NULL;
|
return(buf);
|
return(buf);
|
}
|
}
|
|
|
/* convert the hex array pointed to by buf into binary to be placed in mem */
|
/* 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 */
|
/* return a pointer to the character AFTER the last byte written */
|
char* hex2mem(buf, mem, count, may_fault)
|
char* hex2mem(buf, mem, count, may_fault)
|
char* buf;
|
char* buf;
|
char* mem;
|
char* mem;
|
int count;
|
int count;
|
int may_fault;
|
int may_fault;
|
{
|
{
|
int i;
|
int i;
|
unsigned char ch;
|
unsigned char ch;
|
|
|
if (may_fault)
|
if (may_fault)
|
mem_fault_routine = set_mem_err;
|
mem_fault_routine = set_mem_err;
|
for (i=0;i<count;i++) {
|
for (i=0;i<count;i++) {
|
ch = hex(*buf++) << 4;
|
ch = hex(*buf++) << 4;
|
ch = ch + hex(*buf++);
|
ch = ch + hex(*buf++);
|
set_char (mem++, ch);
|
set_char (mem++, ch);
|
if (may_fault && mem_err)
|
if (may_fault && mem_err)
|
return (mem);
|
return (mem);
|
}
|
}
|
if (may_fault)
|
if (may_fault)
|
mem_fault_routine = NULL;
|
mem_fault_routine = NULL;
|
return(mem);
|
return(mem);
|
}
|
}
|
|
|
/* this function takes the 386 exception vector and attempts to
|
/* this function takes the 386 exception vector and attempts to
|
translate this number into a unix compatible signal value */
|
translate this number into a unix compatible signal value */
|
int computeSignal( exceptionVector )
|
int computeSignal( exceptionVector )
|
int exceptionVector;
|
int exceptionVector;
|
{
|
{
|
int sigval;
|
int sigval;
|
switch (exceptionVector) {
|
switch (exceptionVector) {
|
case 0 : sigval = 8; break; /* divide by zero */
|
case 0 : sigval = 8; break; /* divide by zero */
|
case 1 : sigval = 5; break; /* debug exception */
|
case 1 : sigval = 5; break; /* debug exception */
|
case 3 : sigval = 5; break; /* breakpoint */
|
case 3 : sigval = 5; break; /* breakpoint */
|
case 4 : sigval = 16; break; /* into instruction (overflow) */
|
case 4 : sigval = 16; break; /* into instruction (overflow) */
|
case 5 : sigval = 16; break; /* bound instruction */
|
case 5 : sigval = 16; break; /* bound instruction */
|
case 6 : sigval = 4; break; /* Invalid opcode */
|
case 6 : sigval = 4; break; /* Invalid opcode */
|
case 7 : sigval = 8; break; /* coprocessor not available */
|
case 7 : sigval = 8; break; /* coprocessor not available */
|
case 8 : sigval = 7; break; /* double fault */
|
case 8 : sigval = 7; break; /* double fault */
|
case 9 : sigval = 11; break; /* coprocessor segment overrun */
|
case 9 : sigval = 11; break; /* coprocessor segment overrun */
|
case 10 : sigval = 11; break; /* Invalid TSS */
|
case 10 : sigval = 11; break; /* Invalid TSS */
|
case 11 : sigval = 11; break; /* Segment not present */
|
case 11 : sigval = 11; break; /* Segment not present */
|
case 12 : sigval = 11; break; /* stack exception */
|
case 12 : sigval = 11; break; /* stack exception */
|
case 13 : sigval = 11; break; /* general protection */
|
case 13 : sigval = 11; break; /* general protection */
|
case 14 : sigval = 11; break; /* page fault */
|
case 14 : sigval = 11; break; /* page fault */
|
case 16 : sigval = 7; break; /* coprocessor error */
|
case 16 : sigval = 7; break; /* coprocessor error */
|
default:
|
default:
|
sigval = 7; /* "software generated"*/
|
sigval = 7; /* "software generated"*/
|
}
|
}
|
return (sigval);
|
return (sigval);
|
}
|
}
|
|
|
/**********************************************/
|
/**********************************************/
|
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
|
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
|
/* RETURN NUMBER OF CHARS PROCESSED */
|
/* RETURN NUMBER OF CHARS PROCESSED */
|
/**********************************************/
|
/**********************************************/
|
int hexToInt(char **ptr, int *intValue)
|
int hexToInt(char **ptr, int *intValue)
|
{
|
{
|
int numChars = 0;
|
int numChars = 0;
|
int hexValue;
|
int hexValue;
|
|
|
*intValue = 0;
|
*intValue = 0;
|
|
|
while (**ptr)
|
while (**ptr)
|
{
|
{
|
hexValue = hex(**ptr);
|
hexValue = hex(**ptr);
|
if (hexValue >=0)
|
if (hexValue >=0)
|
{
|
{
|
*intValue = (*intValue <<4) | hexValue;
|
*intValue = (*intValue <<4) | hexValue;
|
numChars ++;
|
numChars ++;
|
}
|
}
|
else
|
else
|
break;
|
break;
|
|
|
(*ptr)++;
|
(*ptr)++;
|
}
|
}
|
|
|
return (numChars);
|
return (numChars);
|
}
|
}
|
|
|
/*
|
/*
|
* This function does all command procesing for interfacing to gdb.
|
* This function does all command procesing for interfacing to gdb.
|
*/
|
*/
|
void handle_exception(int exceptionVector)
|
void handle_exception(int exceptionVector)
|
{
|
{
|
int sigval, stepping;
|
int sigval, stepping;
|
int addr, length;
|
int addr, length;
|
char * ptr;
|
char * ptr;
|
int newPC;
|
int newPC;
|
|
|
gdb_i386vector = exceptionVector;
|
gdb_i386vector = exceptionVector;
|
|
|
if (remote_debug) printf("vector=%d, sr=0x%x, pc=0x%x\n",
|
if (remote_debug) printf("vector=%d, sr=0x%x, pc=0x%x\n",
|
exceptionVector,
|
exceptionVector,
|
registers[ PS ],
|
registers[ PS ],
|
registers[ PC ]);
|
registers[ PC ]);
|
|
|
/* reply to host that an exception has occurred */
|
/* reply to host that an exception has occurred */
|
sigval = computeSignal( exceptionVector );
|
sigval = computeSignal( exceptionVector );
|
remcomOutBuffer[0] = 'S';
|
remcomOutBuffer[0] = 'S';
|
remcomOutBuffer[1] = hexchars[sigval >> 4];
|
remcomOutBuffer[1] = hexchars[sigval >> 4];
|
remcomOutBuffer[2] = hexchars[sigval % 16];
|
remcomOutBuffer[2] = hexchars[sigval % 16];
|
remcomOutBuffer[3] = 0;
|
remcomOutBuffer[3] = 0;
|
|
|
putpacket(remcomOutBuffer);
|
putpacket(remcomOutBuffer);
|
|
|
stepping = 0;
|
stepping = 0;
|
|
|
while (1==1) {
|
while (1==1) {
|
remcomOutBuffer[0] = 0;
|
remcomOutBuffer[0] = 0;
|
ptr = getpacket();
|
ptr = getpacket();
|
|
|
switch (*ptr++) {
|
switch (*ptr++) {
|
case '?' : remcomOutBuffer[0] = 'S';
|
case '?' : remcomOutBuffer[0] = 'S';
|
remcomOutBuffer[1] = hexchars[sigval >> 4];
|
remcomOutBuffer[1] = hexchars[sigval >> 4];
|
remcomOutBuffer[2] = hexchars[sigval % 16];
|
remcomOutBuffer[2] = hexchars[sigval % 16];
|
remcomOutBuffer[3] = 0;
|
remcomOutBuffer[3] = 0;
|
break;
|
break;
|
case 'd' : remote_debug = !(remote_debug); /* toggle debug flag */
|
case 'd' : remote_debug = !(remote_debug); /* toggle debug flag */
|
break;
|
break;
|
case 'g' : /* return the value of the CPU registers */
|
case 'g' : /* return the value of the CPU registers */
|
mem2hex((char*) registers, remcomOutBuffer, NUMREGBYTES, 0);
|
mem2hex((char*) registers, remcomOutBuffer, NUMREGBYTES, 0);
|
break;
|
break;
|
case 'G' : /* set the value of the CPU registers - return OK */
|
case 'G' : /* set the value of the CPU registers - return OK */
|
hex2mem(ptr, (char*) registers, NUMREGBYTES, 0);
|
hex2mem(ptr, (char*) registers, NUMREGBYTES, 0);
|
strcpy(remcomOutBuffer,"OK");
|
strcpy(remcomOutBuffer,"OK");
|
break;
|
break;
|
case 'P' : /* set the value of a single CPU register - return OK */
|
case 'P' : /* set the value of a single CPU register - return OK */
|
{
|
{
|
int regno;
|
int regno;
|
|
|
if (hexToInt (&ptr, ®no) && *ptr++ == '=')
|
if (hexToInt (&ptr, ®no) && *ptr++ == '=')
|
if (regno >= 0 && regno < NUMREGS)
|
if (regno >= 0 && regno < NUMREGS)
|
{
|
{
|
hex2mem (ptr, (char *)®isters[regno], 4, 0);
|
hex2mem (ptr, (char *)®isters[regno], 4, 0);
|
strcpy(remcomOutBuffer,"OK");
|
strcpy(remcomOutBuffer,"OK");
|
break;
|
break;
|
}
|
}
|
|
|
strcpy (remcomOutBuffer, "E01");
|
strcpy (remcomOutBuffer, "E01");
|
break;
|
break;
|
}
|
}
|
|
|
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
|
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
|
case 'm' :
|
case 'm' :
|
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
|
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
|
if (hexToInt(&ptr,&addr))
|
if (hexToInt(&ptr,&addr))
|
if (*(ptr++) == ',')
|
if (*(ptr++) == ',')
|
if (hexToInt(&ptr,&length))
|
if (hexToInt(&ptr,&length))
|
{
|
{
|
ptr = 0;
|
ptr = 0;
|
mem_err = 0;
|
mem_err = 0;
|
mem2hex((char*) addr, remcomOutBuffer, length, 1);
|
mem2hex((char*) addr, remcomOutBuffer, length, 1);
|
if (mem_err) {
|
if (mem_err) {
|
strcpy (remcomOutBuffer, "E03");
|
strcpy (remcomOutBuffer, "E03");
|
debug_error ("memory fault");
|
debug_error ("memory fault");
|
}
|
}
|
}
|
}
|
|
|
if (ptr)
|
if (ptr)
|
{
|
{
|
strcpy(remcomOutBuffer,"E01");
|
strcpy(remcomOutBuffer,"E01");
|
}
|
}
|
break;
|
break;
|
|
|
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
|
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
|
case 'M' :
|
case 'M' :
|
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
|
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
|
if (hexToInt(&ptr,&addr))
|
if (hexToInt(&ptr,&addr))
|
if (*(ptr++) == ',')
|
if (*(ptr++) == ',')
|
if (hexToInt(&ptr,&length))
|
if (hexToInt(&ptr,&length))
|
if (*(ptr++) == ':')
|
if (*(ptr++) == ':')
|
{
|
{
|
mem_err = 0;
|
mem_err = 0;
|
hex2mem(ptr, (char*) addr, length, 1);
|
hex2mem(ptr, (char*) addr, length, 1);
|
|
|
if (mem_err) {
|
if (mem_err) {
|
strcpy (remcomOutBuffer, "E03");
|
strcpy (remcomOutBuffer, "E03");
|
debug_error ("memory fault");
|
debug_error ("memory fault");
|
} else {
|
} else {
|
strcpy(remcomOutBuffer,"OK");
|
strcpy(remcomOutBuffer,"OK");
|
}
|
}
|
|
|
ptr = 0;
|
ptr = 0;
|
}
|
}
|
if (ptr)
|
if (ptr)
|
{
|
{
|
strcpy(remcomOutBuffer,"E02");
|
strcpy(remcomOutBuffer,"E02");
|
}
|
}
|
break;
|
break;
|
|
|
/* cAA..AA Continue at address AA..AA(optional) */
|
/* cAA..AA Continue at address AA..AA(optional) */
|
/* sAA..AA Step one instruction from AA..AA(optional) */
|
/* sAA..AA Step one instruction from AA..AA(optional) */
|
case 's' :
|
case 's' :
|
stepping = 1;
|
stepping = 1;
|
case 'c' :
|
case 'c' :
|
/* try to read optional parameter, pc unchanged if no parm */
|
/* try to read optional parameter, pc unchanged if no parm */
|
if (hexToInt(&ptr,&addr))
|
if (hexToInt(&ptr,&addr))
|
registers[ PC ] = addr;
|
registers[ PC ] = addr;
|
|
|
newPC = registers[ PC];
|
newPC = registers[ PC];
|
|
|
/* clear the trace bit */
|
/* clear the trace bit */
|
registers[ PS ] &= 0xfffffeff;
|
registers[ PS ] &= 0xfffffeff;
|
|
|
/* set the trace bit if we're stepping */
|
/* set the trace bit if we're stepping */
|
if (stepping) registers[ PS ] |= 0x100;
|
if (stepping) registers[ PS ] |= 0x100;
|
|
|
_returnFromException(); /* this is a jump */
|
_returnFromException(); /* this is a jump */
|
break;
|
break;
|
|
|
/* kill the program */
|
/* kill the program */
|
case 'k' : /* do nothing */
|
case 'k' : /* do nothing */
|
#if 0
|
#if 0
|
/* Huh? This doesn't look like "nothing".
|
/* Huh? This doesn't look like "nothing".
|
m68k-stub.c and sparc-stub.c don't have it. */
|
m68k-stub.c and sparc-stub.c don't have it. */
|
BREAKPOINT();
|
BREAKPOINT();
|
#endif
|
#endif
|
break;
|
break;
|
} /* switch */
|
} /* switch */
|
|
|
/* reply to the request */
|
/* reply to the request */
|
putpacket(remcomOutBuffer);
|
putpacket(remcomOutBuffer);
|
}
|
}
|
}
|
}
|
|
|
/* this function is used to set up exception handlers for tracing and
|
/* this function is used to set up exception handlers for tracing and
|
breakpoints */
|
breakpoints */
|
void set_debug_traps()
|
void set_debug_traps()
|
{
|
{
|
extern void remcomHandler();
|
extern void remcomHandler();
|
int exception;
|
int exception;
|
|
|
stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
|
stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
|
|
|
exceptionHandler (0, _catchException0);
|
exceptionHandler (0, _catchException0);
|
exceptionHandler (1, _catchException1);
|
exceptionHandler (1, _catchException1);
|
exceptionHandler (3, _catchException3);
|
exceptionHandler (3, _catchException3);
|
exceptionHandler (4, _catchException4);
|
exceptionHandler (4, _catchException4);
|
exceptionHandler (5, _catchException5);
|
exceptionHandler (5, _catchException5);
|
exceptionHandler (6, _catchException6);
|
exceptionHandler (6, _catchException6);
|
exceptionHandler (7, _catchException7);
|
exceptionHandler (7, _catchException7);
|
exceptionHandler (8, _catchException8);
|
exceptionHandler (8, _catchException8);
|
exceptionHandler (9, _catchException9);
|
exceptionHandler (9, _catchException9);
|
exceptionHandler (10, _catchException10);
|
exceptionHandler (10, _catchException10);
|
exceptionHandler (11, _catchException11);
|
exceptionHandler (11, _catchException11);
|
exceptionHandler (12, _catchException12);
|
exceptionHandler (12, _catchException12);
|
exceptionHandler (13, _catchException13);
|
exceptionHandler (13, _catchException13);
|
exceptionHandler (14, _catchException14);
|
exceptionHandler (14, _catchException14);
|
exceptionHandler (16, _catchException16);
|
exceptionHandler (16, _catchException16);
|
|
|
initialized = 1;
|
initialized = 1;
|
}
|
}
|
|
|
/* This function will generate a breakpoint exception. It is used at the
|
/* 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
|
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
|
otherwise as a quick means to stop program execution and "break" into
|
the debugger. */
|
the debugger. */
|
|
|
void breakpoint()
|
void breakpoint()
|
{
|
{
|
if (initialized)
|
if (initialized)
|
BREAKPOINT();
|
BREAKPOINT();
|
}
|
}
|
|
|
