| [444] | 1 | /* |
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| 2 | * Copyright (c) 1995, 1996 Cygnus Support |
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| 3 | * |
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| 4 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 5 | * and license this software and its documentation for any purpose, provided |
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| 6 | * that existing copyright notices are retained in all copies and that this |
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| 7 | * notice is included verbatim in any distributions. No written agreement, |
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| 8 | * license, or royalty fee is required for any of the authorized uses. |
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| 9 | * Modifications to this software may be copyrighted by their authors |
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| 10 | * and need not follow the licensing terms described here, provided that |
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| 11 | * the new terms are clearly indicated on the first page of each file where |
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| 12 | * they apply. |
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| 13 | */ |
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| 14 | |
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| 15 | static const char hexchars[]="0123456789abcdef"; |
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| 16 | |
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| 17 | typedef void (*exception_t)(int); /* pointer to function with int parm */ |
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| 18 | |
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| 19 | /* |
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| 20 | * This is the default function handler to be called with all exceptions. |
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| 21 | */ |
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| 22 | extern exception_t default_trap_hook; |
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| 23 | |
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| 24 | /* this is used to make Unix style signale nukbers to an exception */ |
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| 25 | struct trap_info |
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| 26 | { |
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| 27 | unsigned char tt; /* exception number */ |
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| 28 | unsigned char signo; /* corresponding signal number */ |
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| 29 | }; |
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| 30 | |
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| 31 | /* |
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| 32 | * prototypes for the functions in debug.c. As these'll only be used with GCC, |
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| 33 | * we don't worry about no stinkin K&R comilers. |
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| 34 | */ |
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| 35 | extern void exception_handler (int, unsigned long); |
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| 36 | extern unsigned char *mem2hex(unsigned char *, unsigned char *, int, int); |
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| 37 | extern unsigned char *hex2mem(unsigned char *, unsigned char *, int, int); |
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| 38 | extern void getpacket(unsigned char *); |
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| 39 | extern void putpacket(unsigned char *); |
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| 40 | extern char *make_return_packet(int); |
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| 41 | extern void set_debug_traps(); |
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| 42 | extern int computeSignal(int); |
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| 43 | extern char digit2hex(int); |
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| 44 | extern int hex2digit(int); |
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| 45 | extern void debuglogs(int level, char *msg); |
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| 46 | extern int hex2int(); |
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| 47 | extern char *int2hex(int); |
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| 48 | extern void gdb_event_loop(int, unsigned long *); |
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| 49 | |
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| 50 | extern char *gdb_read_registers(); /* g - read registers */ |
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| 51 | extern char *gdb_write_registers(char *); /* G - write registers */ |
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| 52 | extern char *gdb_read_memory(long, int); /* m - read memory */ |
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| 53 | extern char *gdb_write_memory(long, int, char *);/* M write memory */ |
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| 54 | extern char *gdb_continue(int, long ); /* c - continue */ |
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| 55 | extern char *gdb_step(int, long); /* s - step instruction(s) */ |
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| 56 | extern char *gdb_kill(); /* k - kill program */ |
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| 57 | extern char *gdb_last_signal(); /* ? - last signal */ |
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| 58 | extern char *gdb_baudrate(int); /* b - change baud rate */ |
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| 59 | extern char *gdb_dump_state(); /* T - dump state */ |
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| 60 | extern char *gdb_set_thread(int, int); /* H - set thread */ |
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| 61 | extern char *gdb_detach(); /* D - detach */ |
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| 62 | extern char *gdb_read_reg(int); /* p - read one register */ |
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| 63 | extern char *gdb_write_reg(int, long); /* P - write one register */ |
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| 64 | extern char *gdb_exited(); /* W - process exited */ |
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| 65 | extern char *gdb_terminated(); /* X - process terminated */ |
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| 66 | extern char *gdb_hex(); /* O - hex encoding */ |
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| 67 | extern char *gdb_thread_alive(int); /* A - tread alive request */ |
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| 68 | extern char *gdb_extended(); /* ! - extended protocol */ |
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| 69 | extern char *gdb_debug(); /* d - toggle stub diagnostics */ |
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| 70 | extern char *gdb_toggle(); /* unsupported, toggle stub on/off */ |
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| 71 | extern char *gdb_reset(); /* r - reset target */ |
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| 72 | extern char *gdb_search(long, long, long); /* t - search backwards */ |
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| 73 | extern char *gdb_query(char *); /* q - general query */ |
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| 74 | extern char *gdb_set(char *); /* Q - set value */ |
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| 75 | |
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| 76 | /* |
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| 77 | * indicate to caller of mem2hex or hex2mem that there has been an error. |
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| 78 | * 0 means ok, 1 means error |
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| 79 | */ |
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| 80 | extern volatile int mem_err; |
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| 81 | |
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| 82 | /* |
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| 83 | * indicate whether the debug vectors have been initialized |
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| 84 | * 0 means not yet, 1 means yep, it's ready. |
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| 85 | */ |
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| 86 | extern int initialized; |
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| 87 | |
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| 88 | /* |
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| 89 | * 1 means print debugging messages from the target, 0 means be quiet. |
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| 90 | */ |
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| 91 | extern int remote_debug; |
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| 92 | |
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| 93 | /* |
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| 94 | * Set up the command processing required for GDB |
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| 95 | */ |
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| 96 | |
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| 97 | struct gdb_ops { |
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| 98 | /* |
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| 99 | * these functions are the most minimal working subset top get full |
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| 100 | * functionality for remote debugging |
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| 101 | */ |
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| 102 | char *(*gdb_read_registers); /* g - read registers */ |
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| 103 | char *(*gdb_write_registers)(char *); /* G - write registers */ |
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| 104 | char *(*gdb_read_memory)(long, int); /* m - read memory */ |
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| 105 | char *(*gdb_write_memory)(long, int, char *);/* M write memory */ |
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| 106 | char *(*gdb_continue)(int, long ); /* c - continue */ |
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| 107 | char *(*gdb_step)(int, long); /* s - step instruction(s) */ |
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| 108 | char *(*gdb_kill); /* k - kill program */ |
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| 109 | char *(*gdb_last_signal); /* ? - last signal */ |
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| 110 | char *(*gdb_baudrate)(int); /* b - change baud rate */ |
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| 111 | char *(*gdb_dump_state); /* T - dump state */ |
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| 112 | /* |
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| 113 | * these functions are for a more sophisticated target, typically |
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| 114 | * running a simple RTOS. |
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| 115 | */ |
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| 116 | char *(*gdb_set_thread)(int, int); /* H - set thread */ |
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| 117 | char *(*gdb_detach); /* D - detach */ |
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| 118 | char *(*gdb_read_reg)(int); /* p - read one register */ |
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| 119 | char *(*gdb_write_reg)(int, long); /* P - write one register */ |
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| 120 | char *(*gdb_exited); /* W - process exited */ |
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| 121 | char *(*gdb_terminated); /* X - process terminated */ |
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| 122 | char *(*gdb_hex); /* O - hex encoding */ |
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| 123 | char *(*gdb_thread_alive)(int); /* A - tread alive request */ |
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| 124 | /* FIXME: not standard yet */ |
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| 125 | char *(*gdb_extended); /* ! - extended protocol */ |
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| 126 | char *(*gdb_debug); /* d - toggle stub diagnostics */ |
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| 127 | char *(*gdb_toggle); /* unsupported, toggle stub on/off */ |
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| 128 | char *(*gdb_reset); /* r - reset target */ |
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| 129 | char *(*gdb_search)(long, long, long); /* t - search backwards */ |
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| 130 | char *(*gdb_query)(char *); /* q - general query */ |
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| 131 | char *(*gdb_set)(long); /* Q - set value */ |
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| 132 | }; |
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| 133 | |
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| 134 | /* |
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| 135 | * BUFMAX defines the maximum number of characters in inbound/outbound buffers |
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| 136 | * at least NUMREGBYTES*2 are needed for register packets |
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| 137 | */ |
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| 138 | #define BUFMAX 2048 |
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| 139 | extern char packet_in_buf[BUFMAX]; |
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| 140 | extern char packet_out_buf[BUFMAX]; |
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| 141 | extern int packet_index; |
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| 142 | |
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| 143 | #define DEBUG(x, y) debuglog(x, y); |
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| 144 | #define set_debug_level(x) remote_debug = x; |
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| 145 | #define OK 0 |
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| 146 | #define ERROR -1 |
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| 147 | #define ENN(x) "x" |
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| 148 | |
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| 149 | #define MAY_FAULT 1 |
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| 150 | #define NO_FAULT 0 |
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