diff options
Diffstat (limited to 'gdb/m32r-stub.c')
| -rw-r--r-- | gdb/m32r-stub.c | 70 |
1 files changed, 66 insertions, 4 deletions
diff --git a/gdb/m32r-stub.c b/gdb/m32r-stub.c index 60c828f..7055fe0 100644 --- a/gdb/m32r-stub.c +++ b/gdb/m32r-stub.c @@ -189,6 +189,7 @@ static void stash_registers(void); static void restore_registers(void); static int prepare_to_step(int); static int finish_from_step(void); +static unsigned long crc32 (unsigned char *, int, unsigned long); static void gdb_error(char *, char *); static int gdb_putchar(int), gdb_puts(char *), gdb_write(char *, int); @@ -486,9 +487,11 @@ handle_exception(int exceptionVector) if ((registers[PC] & 2) != 0) prepare_to_step(1); } + return; case 'D': /* Detach */ +#if 0 /* I am interpreting this to mean, release the board from control by the remote stub. To do this, I am restoring the original (or at least previous) exception vectors. @@ -497,6 +500,32 @@ handle_exception(int exceptionVector) exceptionHandler (i, save_vectors[i]); putpacket ("OK"); return; /* continue the inferior */ +#else + strcpy(remcomOutBuffer,"OK"); + break; +#endif + case 'q': + ptr = &remcomInBuffer[1]; + if (*ptr++ == 'C' && + *ptr++ == 'R' && + *ptr++ == 'C' && + *ptr++ == ':') + { + unsigned long start, len, our_crc; + + if (hexToInt (&ptr, (int *) &start) && + *ptr++ == ',' && + hexToInt (&ptr, (int *) &len)) + { + remcomOutBuffer[0] = 'C'; + our_crc = crc32 ((unsigned char *) start, len, 0xffffffff); + mem2hex ((char *) &our_crc, + &remcomOutBuffer[1], + sizeof (long), + 0); + } /* else do nothing */ + } /* else do nothing */ + break; case 'k': /* kill the program */ continue; @@ -507,6 +536,39 @@ handle_exception(int exceptionVector) } } +/* qCRC support */ + +/* Table used by the crc32 function to calcuate the checksum. */ +static unsigned long crc32_table[256] = {0, 0}; + +static unsigned long +crc32 (buf, len, crc) + unsigned char *buf; + int len; + unsigned long crc; +{ + if (! crc32_table[1]) + { + /* Initialize the CRC table and the decoding table. */ + int i, j; + unsigned long c; + + for (i = 0; i < 256; i++) + { + for (c = i << 24, j = 8; j > 0; --j) + c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); + crc32_table[i] = c; + } + } + + while (len--) + { + crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; + buf++; + } + return crc; +} + static int hex(ch) unsigned char ch; @@ -756,7 +818,7 @@ bin2mem (buf, mem, count, may_fault) case 0x4: /* $ */ case 0x5d: /* escape char */ buf++; - *buf += 0x20; + *buf |= 0x20; break; default: /* nothing */ @@ -985,13 +1047,13 @@ branchDestination(instr, branchCode) case 2: /* JL or JMP */ return registers[instr[1] & 0x0F] & ~3; /* jump thru a register */ case 3: /* BC, BNC, BL, BRA (short, 8-bit relative offset) */ - return (((int) instr) & ~3) + ((unsigned char) instr[1] << 2); + return (((int) instr) & ~3) + ((char) instr[1] << 2); case 4: /* BC, BNC, BL, BRA (long, 24-bit relative offset) */ return ((int) instr + - ((((unsigned char) instr[1] << 16) | (instr[2] << 8) | (instr[3])) << 2)); + ((((char) instr[1] << 16) | (instr[2] << 8) | (instr[3])) << 2)); case 5: /* BNE, BEQ (16-bit relative offset) */ case 6: /* BNEZ, BLTZ, BLEZ, BGTZ, BGEZ ,BEQZ (ditto) */ - return ((int) instr + ((((unsigned char) instr[2] << 8) | (instr[3])) << 2)); + return ((int) instr + ((((char) instr[2] << 8) | (instr[3])) << 2)); } /* An explanatory note: in the last three return expressions, I have |