Mercurial > flash_v2
annotate packages/hal/common/current/include/generic-stub.h @ 112:02ea4320376c ecos-sw-2000-07-21
Merge from eCos master repository on 2000-07-21-21:01:39-BST
| author | jlarmour |
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| date | Fri, 21 Jul 2000 21:34:11 +0000 |
| parents | 435cced73e2f |
| children | 6ed91473a1cd |
| rev | line source |
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1 //======================================================================== |
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2 // |
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3 // generic-stub.h |
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4 // |
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5 // Definitions for the generic GDB remote stub |
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6 // |
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7 //======================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Red Hat eCos Public License |
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12 // Version 1.1 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://www.redhat.com/ |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Configurable Operating System, |
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22 // released September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Red Hat. |
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25 // Portions created by Red Hat are |
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. |
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27 // All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
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30 //####COPYRIGHTEND#### |
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31 //======================================================================== |
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32 //#####DESCRIPTIONBEGIN#### |
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33 // |
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34 // Author(s): Red Hat, nickg |
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35 // Contributors: Red Hat, nickg |
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36 // Date: 1998-06-08 |
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37 // Purpose: |
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38 // Description: Definitions for the generic GDB remote stub |
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39 // Usage: This header is not to be included by user code, and is |
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40 // only placed in a publically accessible directory so |
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41 // that platform stub packages are able to include it |
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42 // if required. |
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43 // |
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44 //####DESCRIPTIONEND#### |
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45 // |
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46 //======================================================================== |
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47 |
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48 |
| 0 | 49 #ifndef GENERIC_STUB_H |
| 50 #define GENERIC_STUB_H | |
| 51 | |
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52 #ifdef __cplusplus |
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53 extern "C" { |
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54 #endif |
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55 |
| 2 | 56 /* Three typedefs must be provided before including this file. |
| 0 | 57 target_register_t should correspond to the largest register value on |
| 58 this target processor. | |
| 2 | 59 regnames_t corresponds to a type representing a register number. |
| 60 uint32 must correspond to at least a 32-bit unsigned integer type | |
| 61 (it may be larger). */ | |
| 0 | 62 |
| 63 #ifndef ASM | |
| 64 | |
| 2 | 65 #ifndef __ECOS__ |
| 66 #include "dbg-serial.h" | |
| 67 #endif // __ECOS__ | |
| 0 | 68 |
| 2 | 69 struct gdb_packet |
| 70 { | |
| 71 /* The checksum calculated so far. */ | |
| 72 uint32 checksum; | |
| 73 /* The checksum we've received from the remote side. */ | |
| 74 uint32 xmitcsum; | |
| 75 /* Contents of the accumulated packet. */ | |
| 76 char *contents; | |
| 77 /* Number of characters received. */ | |
| 78 uint32 length; | |
| 79 /* | |
| 80 * state is the current state: | |
| 81 * 0 = looking for start of packet | |
| 82 * 1 = got start of packet, looking for # terminator | |
| 83 * 2 = looking for first byte of checksum | |
| 84 * 3 = looking for second byte of checksum (indicating end of packet) | |
| 85 */ | |
| 86 char state; | |
| 87 }; | |
| 0 | 88 |
| 89 /* Return the currently-saved value corresponding to register REG. */ | |
| 90 extern target_register_t get_register (regnames_t reg); | |
| 91 | |
| 92 /* Store VALUE in the register corresponding to WHICH. */ | |
| 93 extern void put_register (regnames_t which, target_register_t value); | |
| 94 | |
| 95 /* Set the next instruction to be executed when the user program resumes | |
| 96 execution to PC. */ | |
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97 #if !defined(SET_PC_PROTOTYPE_EXISTS) && !defined(set_pc) |
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98 #define SET_PC_PROTOTYPE_EXISTS |
| 0 | 99 extern void set_pc (target_register_t pc); |
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100 #endif |
| 0 | 101 |
| 102 /* Set the return value of the currently-pending syscall to VALUE. */ | |
| 103 extern void set_syscall_value (target_register_t value); | |
| 104 | |
| 105 /* Return the Nth argument to the currently-pending syscall (starting from | |
| 106 0). */ | |
| 107 extern target_register_t get_syscall_arg (int n); | |
| 108 | |
| 109 /* Initialize the stub. This will also install any trap handlers needed by | |
| 110 the stub. */ | |
| 111 extern void initialize_stub (void); | |
| 112 | |
| 113 /* Initialize the hardware. */ | |
| 114 extern void initHardware (void); | |
| 115 | |
| 116 /* Skip the current instruction. */ | |
| 117 extern void __skipinst (void); | |
| 118 | |
| 2 | 119 /* If the address in the PC register corresponds to the breakpoint() |
| 120 instruction, return a non-zero value. */ | |
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121 #ifndef __is_breakpoint_function |
| 0 | 122 extern int __is_breakpoint_function (void); |
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123 #endif |
| 0 | 124 |
| 125 /* Execute a breakpoint instruction. Restarting will cause the instruction | |
| 126 to be skipped. */ | |
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127 #ifndef breakpoint |
| 0 | 128 extern void breakpoint (void); |
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129 #endif |
| 0 | 130 |
| 131 /* Return the syscall # corresponding to this system call. */ | |
| 132 extern int __get_syscall_num (void); | |
| 133 | |
| 134 /* Transfer exception event processing to the stub. */ | |
| 135 extern void __switch_to_stub (void); | |
| 136 | |
| 137 /* Send an exit packet containing the specified status. */ | |
| 138 extern void __send_exit_status (int status); | |
| 139 | |
| 2 | 140 /* Copy COUNT bytes of memory from ADDR to BUF. |
| 141 ADDR is assumed to live in the user program's space. | |
| 142 Returns number of bytes successfully read | |
| 143 (caller must check to see if less than requested). */ | |
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144 extern int __read_mem_safe (void *buf, |
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145 void *addr, |
| 2 | 146 int count); |
| 0 | 147 |
| 2 | 148 /* Copy COUNT bytes of memory from BUF to ADDR. |
| 149 ADDR is assumed to live in the user program's space. | |
| 150 Returns number of bytes successfully read | |
| 151 (caller must check to see if less than requested). */ | |
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152 #ifndef __write_mem_safe |
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153 extern int __write_mem_safe (void *buf, |
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154 void *addr, |
| 2 | 155 int count); |
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156 #endif |
| 0 | 157 |
| 2 | 158 /* Set to a non-zero value if a memory fault occurs while |
| 159 __set_mem_fault_trap () is running. */ | |
| 160 extern volatile int __mem_fault; | |
| 161 | |
| 162 #ifndef __ECOS__ | |
| 163 #if 1 | |
| 164 #include "stub-tservice.h" /* target dependent stub services */ | |
| 165 #else | |
| 0 | 166 /* Flush the instruction cache. */ |
| 167 extern void flush_i_cache (void); | |
| 168 | |
| 169 /* Flush the data cache. */ | |
| 170 extern void __flush_d_cache (void); | |
| 171 | |
| 172 typedef enum { | |
| 173 CACHE_NOOP, CACHE_ENABLE, CACHE_DISABLE, CACHE_FLUSH | |
| 174 } cache_control_t; | |
| 175 | |
| 176 /* Perform the specified operation on the instruction cache. | |
| 177 Returns 1 if the cache is enabled, 0 otherwise. */ | |
| 178 extern int __instruction_cache (cache_control_t request); | |
| 179 /* Perform the specified operation on the data cache. | |
| 180 Returns 1 if the cache is enabled, 0 otherwise. */ | |
| 181 extern int __data_cache (cache_control_t request); | |
| 2 | 182 #endif |
| 183 #endif // __ECOS__ | |
| 0 | 184 |
| 185 /* Write the 'T' packet in BUFFER. SIGVAL is the signal the program | |
| 186 received. */ | |
| 187 extern void __build_t_packet (int sigval, char *buffer); | |
| 188 | |
| 189 /* Return 1 when a complete packet has been received, 0 if the packet | |
| 190 is not yet complete, or -1 if an erroneous packet was NAKed. */ | |
| 2 | 191 int __add_char_to_packet (unsigned character, struct gdb_packet *packet); |
| 0 | 192 |
| 193 typedef int (*__PFI)(int); | |
| 194 typedef void (*__PFV)(void); | |
| 195 | |
| 196 /* When an exception occurs, __process_exception_vec will be invoked with | |
| 197 the signal number corresponding to the trap/exception. The function | |
| 198 should return zero if it wishes execution to resume from the saved | |
| 199 register values; a non-zero value indicates that the exception handler | |
| 200 should be reinvoked. */ | |
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201 #if !defined(PROCESS_EXCEPTION_VEC_PROTOTYPE_EXISTS) |
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202 #define PROCESS_EXCEPTION_VEC_PROTOTYPE_EXISTS |
| 0 | 203 extern volatile __PFI __process_exception_vec; |
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204 #endif |
| 2 | 205 |
| 206 /* __process_exit_vec is invoked when a 'k' kill packet is received | |
| 207 from GDB. */ | |
| 0 | 208 extern volatile __PFV __process_exit_vec; |
| 2 | 209 |
| 210 /* If SIGSYSCALL is defined, and such a signal value is returned from | |
| 211 __computeSignal (), the function pointed to by this vector will | |
| 212 be invoked. | |
| 213 | |
| 214 If the return value is negative, the user program is assumed to | |
| 215 have received the corresponding positive signal value, and an | |
| 216 exception will be processed. Otherwise, the user program is | |
| 217 restarted from the next instruction. */ | |
| 0 | 218 extern volatile __PFI __process_syscall_vec; |
| 2 | 219 |
| 220 /* A continue packet was received from GDB with a signal value. The function | |
| 221 pointed to by __process_signal_vec will be invoked with this signal | |
| 222 value. | |
| 223 | |
| 224 If a zero value is returned, we will ignore the signal, and proceed | |
| 225 with the continue request. Otherwise, the program will be killed | |
| 226 with the signal. */ | |
| 0 | 227 extern volatile __PFI __process_signal_vec; |
| 2 | 228 |
| 229 /* If non-NULL, __init_vec is called right before the user program is | |
| 230 resumed. */ | |
| 231 extern volatile __PFV __init_vec; | |
| 232 /* if non-NULL, __cleanup_vec is called after the user program takes | |
| 233 an exception. */ | |
| 234 extern volatile __PFV __cleanup_vec; | |
| 0 | 235 |
| 236 /* Send an 'O' packet to GDB containing STR. */ | |
| 2 | 237 extern int __output_gdb_string (target_register_t addr, int string_len); |
| 0 | 238 |
| 239 /* Request MAXLEN bytes of input from GDB to be stored in DEST. If BLOCK | |
| 240 is set, GDB should block until MAXLEN bytes are available to be | |
| 241 read; otherwise, it will return immediately with whatever data is | |
| 242 available. | |
| 243 The return value is the number of bytes written into DEST. */ | |
| 2 | 244 extern int __get_gdb_input (target_register_t dest, int maxlen, int block); |
| 0 | 245 |
| 2 | 246 /* Return the ASCII equivalent of C (C>=0 && C<=15). The result will be |
| 247 lower-case. */ | |
| 0 | 248 extern char __tohex (int c); |
| 249 | |
| 2 | 250 /* Convert COUNT bytes of the memory region in MEM to a hexadecimal |
| 251 string in DEST. | |
| 252 The resulting string will contain 2*COUNT characters. | |
| 253 If MAY_FAULT is non-zero, memory faults are trapped; if a fault occurs, | |
| 254 a NULL value will be returned. | |
| 255 The value returned is one byte past the end of the string written. */ | |
| 256 extern char *__mem2hex (char *mem, char *dest, int count, int may_fault); | |
| 257 | |
| 258 /* Given a hexadecimal string in MEM, write the equivalent bytes to DEST. | |
| 259 The string is assumed to contain 2*COUNT characters. | |
| 260 If MAY_FAULT is non-zero, memory faults are trapped; if a fault occurs, | |
| 261 a NULL value will be returned. | |
| 262 Otherwise, the value returned is one byte past the last byte written. */ | |
| 263 extern char *__hex2mem (char *buf, char *mem, int count, int may_fault); | |
| 264 | |
| 265 /* Set the program arguments passed into the user program's main */ | |
| 266 extern void __set_program_args (int argc, char **argv); | |
| 267 | |
| 268 /* Return the user program arguments passed in from GDB (via an 'A' | |
| 269 packet). argcPtr is a pointer into the user program, which will hold | |
| 270 the number of arguments; the strings are returned. */ | |
| 271 extern char **__get_program_args (target_register_t argcPtr); | |
| 272 | |
| 273 /* Encode PACKET as a remote protocol packet and send it to GDB; this takes | |
| 274 care of sending the initial '$' character, as well as the trailing '#' | |
| 275 and checksum, and also waits for an ACK from the remote side, resending | |
| 276 as necessary. */ | |
| 277 extern void __putpacket (char *packet); | |
| 278 | |
| 279 /* Convert the hexadecimal string pointed to by *PTR into an integer, | |
| 280 and store it in the value pointed to by INTVALUE. The number of | |
| 281 characters read from *PTR will be returned; *PTR will point to the first | |
| 282 non-hexadecmial character encountered. */ | |
| 283 extern unsigned int __hexToInt (char **ptr, target_register_t *intValue); | |
| 284 | |
| 285 /* Convert the value in INTVALUE into a string of hexadecimal | |
| 286 characters stored in PTR. NUMBITS are the number of bits to use | |
| 287 in INTVALUE. The number of characters written to PTR will be returned. */ | |
| 288 extern unsigned int __intToHex (char *ptr, | |
| 289 target_register_t intValue, | |
| 290 int numBits); | |
| 291 | |
| 292 /* Handle an exception, usually some sort of hardware or software trap. | |
| 293 This is responsible for communicating the exception to GDB. */ | |
| 294 extern void __handle_exception (void); | |
| 295 | |
| 296 /* Send a 'X' packet with signal SIGVAL to GDB. */ | |
| 297 extern void __kill_program (int sigval); | |
| 298 | |
| 299 /* Given a packet pointed to by PACKETCONTENTS, decode it and respond to | |
| 300 GDB appropriately. */ | |
| 301 extern int __process_packet (char *packetContents); | |
| 302 | |
| 303 /* Write the C-style string pointed to by STR to the GDB comm port. | |
| 304 Used for printing debug messages. */ | |
| 305 extern void __putDebugStr (char *str); | |
| 306 | |
|
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307 #if defined(NO_MALLOC) && !defined(MAX_BP_NUM) |
| 2 | 308 #define MAX_BP_NUM 64 /* Maximum allowed # of breakpoints */ |
| 0 | 309 #endif |
| 310 | |
| 2 | 311 #endif /* ASM */ |
| 312 | |
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313 #ifdef __cplusplus |
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314 } /* extern "C" */ |
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315 #endif |
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316 |
| 2 | 317 #endif /* GENERIC_STUB_H */ |