| Line 868... |
Line 868... |
| 868 |
}
|
868 |
}
|
| 869 |
/* skip the @ prefix if present, it is no longer useful */
|
869 |
/* skip the @ prefix if present, it is no longer useful */
|
| 870 |
if (cmdline[0] == '@') cmdline++;
|
870 |
if (cmdline[0] == '@') cmdline++;
|
| 871 |
} else {
|
871 |
} else {
|
| 872 |
unsigned char far *rmod_inputbuf = MK_FP(rmod->rmodseg, RMOD_OFFSET_INPUTBUF);
|
872 |
unsigned char far *rmod_inputbuf = MK_FP(rmod->rmodseg, RMOD_OFFSET_INPUTBUF);
|
| 873 |
unsigned short far *rmod_stacksig = MK_FP(rmod->rmodseg, RMOD_OFFSET_STACKSIG);
|
- |
|
| 874 |
/* invalidate input history if it appears to be damaged (could occur
|
873 |
/* invalidate input history if it appears to be damaged (could occur
|
| 875 |
* because of a stack overflow, for example if some stack-hungry TSR is
|
874 |
* because of a stack overflow, for example if some stack-hungry TSR is
|
| 876 |
* being used) */
|
875 |
* being used) */
|
| - |
|
876 |
if ((rmod_inputbuf[0] != 128) || (rmod_inputbuf[rmod_inputbuf[1] + 2] != '\r') || (rmod_inputbuf[rmod_inputbuf[1] + 3] != 0xCA) || (rmod_inputbuf[rmod_inputbuf[1] + 4] != 0xFE)) {
|
| 877 |
if (*rmod_stacksig != 0xCAFE) {
|
877 |
rmod_inputbuf[0] = 128; /* max allowed input length */
|
| 878 |
*rmod_stacksig = 0xCAFE;
|
878 |
rmod_inputbuf[1] = 0; /* string len stored in buffer */
|
| 879 |
rmod_inputbuf[0] = 128; /* max allowed input length */
|
879 |
rmod_inputbuf[2] = '\r'; /* string terminator */
|
| 880 |
rmod_inputbuf[1] = 0;
|
880 |
rmod_inputbuf[3] = 0xCA; /* trailing signature */
|
| 881 |
rmod_inputbuf[2] = '\r';
|
881 |
rmod_inputbuf[4] = 0xFE; /* trailing signature */
|
| 882 |
/* printf("STACK OVERFLOW DETECTED: HISTORY FLUSHED\r\n"); */
|
882 |
outputnl("SvarCOM: stack overflow detected, command history flushed (this is not a bug)");
|
| 883 |
}
|
883 |
}
|
| 884 |
/* interactive mode: display prompt (if echo enabled) and wait for user
|
884 |
/* interactive mode: display prompt (if echo enabled) and wait for user
|
| 885 |
* command line */
|
885 |
* command line */
|
| 886 |
if (rmod->flags & FLAG_ECHOFLAG) build_and_display_prompt(BUFFER, *rmod_envseg);
|
886 |
if (rmod->flags & FLAG_ECHOFLAG) build_and_display_prompt(BUFFER, *rmod_envseg);
|
| 887 |
/* collect user input */
|
887 |
/* collect user input */
|
| 888 |
cmdline_getinput(rmod->rmodseg, RMOD_OFFSET_INPUTBUF);
|
888 |
cmdline_getinput(rmod->rmodseg, RMOD_OFFSET_INPUTBUF);
|
| - |
|
889 |
/* append stack-overflow detection signature to the end of the input buffer */
|
| - |
|
890 |
rmod_inputbuf[rmod_inputbuf[1] + 3] = 0xCA; /* trailing signature */
|
| - |
|
891 |
rmod_inputbuf[rmod_inputbuf[1] + 4] = 0xFE; /* trailing signature */
|
| 889 |
/* copy it to local cmdline */
|
892 |
/* copy it to local cmdline */
|
| 890 |
if (rmod_inputbuf[1] != 0) _fmemcpy(cmdline, rmod_inputbuf + 2, rmod_inputbuf[1]);
|
893 |
if (rmod_inputbuf[1] != 0) _fmemcpy(cmdline, rmod_inputbuf + 2, rmod_inputbuf[1]);
|
| 891 |
cmdline[rmod_inputbuf[1]] = 0; /* zero-terminate local buff (original is '\r'-terminated) */
|
894 |
cmdline[rmod_inputbuf[1]] = 0; /* zero-terminate local buff (original is '\r'-terminated) */
|
| 892 |
}
|
895 |
}
|
| 893 |
|
896 |
|