151 lines
5.8 KiB
C
151 lines
5.8 KiB
C
/*
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* Copyright (c) 1995, 1996 Cygnus Support
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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static const char hexchars[]="0123456789abcdef";
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typedef void (*exception_t)(int); /* pointer to function with int parm */
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/*
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* This is the default function handler to be called with all exceptions.
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*/
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extern exception_t default_trap_hook;
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/* this is used to make Unix style signale nukbers to an exception */
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struct trap_info
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{
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unsigned char tt; /* exception number */
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unsigned char signo; /* corresponding signal number */
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};
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/*
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* prototypes for the functions in debug.c. As these'll only be used with GCC,
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* we don't worry about no stinkin K&R comilers.
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*/
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extern void exception_handler (int, unsigned long);
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extern unsigned char *mem2hex(unsigned char *, unsigned char *, int, int);
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extern unsigned char *hex2mem(unsigned char *, unsigned char *, int, int);
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extern void getpacket(unsigned char *);
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extern void putpacket(unsigned char *);
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extern char *make_return_packet(int);
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extern void set_debug_traps();
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extern int computeSignal(int);
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extern char digit2hex(int);
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extern int hex2digit(int);
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extern void debuglogs(int level, char *msg);
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extern int hex2int();
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extern char *int2hex(int);
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extern void gdb_event_loop(int, unsigned long *);
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extern char *gdb_read_registers(); /* g - read registers */
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extern char *gdb_write_registers(char *); /* G - write registers */
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extern char *gdb_read_memory(long, int); /* m - read memory */
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extern char *gdb_write_memory(long, int, char *);/* M write memory */
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extern char *gdb_continue(int, long ); /* c - continue */
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extern char *gdb_step(int, long); /* s - step instruction(s) */
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extern char *gdb_kill(); /* k - kill program */
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extern char *gdb_last_signal(); /* ? - last signal */
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extern char *gdb_baudrate(int); /* b - change baud rate */
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extern char *gdb_dump_state(); /* T - dump state */
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extern char *gdb_set_thread(int, int); /* H - set thread */
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extern char *gdb_detach(); /* D - detach */
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extern char *gdb_read_reg(int); /* p - read one register */
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extern char *gdb_write_reg(int, long); /* P - write one register */
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extern char *gdb_exited(); /* W - process exited */
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extern char *gdb_terminated(); /* X - process terminated */
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extern char *gdb_hex(); /* O - hex encoding */
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extern char *gdb_thread_alive(int); /* A - tread alive request */
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extern char *gdb_extended(); /* ! - extended protocol */
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extern char *gdb_debug(); /* d - toggle stub diagnostics */
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extern char *gdb_toggle(); /* unsupported, toggle stub on/off */
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extern char *gdb_reset(); /* r - reset target */
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extern char *gdb_search(long, long, long); /* t - search backwards */
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extern char *gdb_query(char *); /* q - general query */
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extern char *gdb_set(char *); /* Q - set value */
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/*
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* indicate to caller of mem2hex or hex2mem that there has been an error.
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* 0 means ok, 1 means error
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*/
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extern volatile int mem_err;
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/*
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* indicate whether the debug vectors have been initialized
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* 0 means not yet, 1 means yep, it's ready.
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*/
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extern int initialized;
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/*
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* 1 means print debugging messages from the target, 0 means be quiet.
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*/
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extern int remote_debug;
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/*
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* Set up the command processing required for GDB
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*/
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struct gdb_ops {
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/*
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* these functions are the most minimal working subset top get full
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* functionality for remote debugging
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*/
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char *(*gdb_read_registers); /* g - read registers */
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char *(*gdb_write_registers)(char *); /* G - write registers */
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char *(*gdb_read_memory)(long, int); /* m - read memory */
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char *(*gdb_write_memory)(long, int, char *);/* M write memory */
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char *(*gdb_continue)(int, long ); /* c - continue */
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char *(*gdb_step)(int, long); /* s - step instruction(s) */
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char *(*gdb_kill); /* k - kill program */
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char *(*gdb_last_signal); /* ? - last signal */
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char *(*gdb_baudrate)(int); /* b - change baud rate */
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char *(*gdb_dump_state); /* T - dump state */
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/*
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* these functions are for a more sophisticated target, typically
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* running a simple RTOS.
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*/
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char *(*gdb_set_thread)(int, int); /* H - set thread */
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char *(*gdb_detach); /* D - detach */
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char *(*gdb_read_reg)(int); /* p - read one register */
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char *(*gdb_write_reg)(int, long); /* P - write one register */
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char *(*gdb_exited); /* W - process exited */
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char *(*gdb_terminated); /* X - process terminated */
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char *(*gdb_hex); /* O - hex encoding */
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char *(*gdb_thread_alive)(int); /* A - tread alive request */
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/* FIXME: not standard yet */
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char *(*gdb_extended); /* ! - extended protocol */
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char *(*gdb_debug); /* d - toggle stub diagnostics */
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char *(*gdb_toggle); /* unsupported, toggle stub on/off */
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char *(*gdb_reset); /* r - reset target */
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char *(*gdb_search)(long, long, long); /* t - search backwards */
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char *(*gdb_query)(char *); /* q - general query */
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char *(*gdb_set)(long); /* Q - set value */
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};
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/*
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* BUFMAX defines the maximum number of characters in inbound/outbound buffers
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* at least NUMREGBYTES*2 are needed for register packets
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*/
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#define BUFMAX 2048
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extern char packet_in_buf[BUFMAX];
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extern char packet_out_buf[BUFMAX];
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extern int packet_index;
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#define DEBUG(x, y) debuglog(x, y);
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#define set_debug_level(x) remote_debug = x;
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#define OK 0
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#define ERROR -1
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#define ENN(x) "x"
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#define MAY_FAULT 1
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#define NO_FAULT 0
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