| 870,16 → 870,16 |
|---|
| if (cmdline[0] == '@') cmdline++; |
| } else { |
| unsigned char far *rmod_inputbuf = MK_FP(rmod->rmodseg, RMOD_OFFSET_INPUTBUF); |
| unsigned short far *rmod_stacksig = MK_FP(rmod->rmodseg, RMOD_OFFSET_STACKSIG); |
| /* invalidate input history if it appears to be damaged (could occur |
| * because of a stack overflow, for example if some stack-hungry TSR is |
| * being used) */ |
| if (*rmod_stacksig != 0xCAFE) { |
| *rmod_stacksig = 0xCAFE; |
| rmod_inputbuf[0] = 128; /* max allowed input length */ |
| rmod_inputbuf[1] = 0; |
| rmod_inputbuf[2] = '\r'; |
| /* printf("STACK OVERFLOW DETECTED: HISTORY FLUSHED\r\n"); */ |
| 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)) { |
| rmod_inputbuf[0] = 128; /* max allowed input length */ |
| rmod_inputbuf[1] = 0; /* string len stored in buffer */ |
| rmod_inputbuf[2] = '\r'; /* string terminator */ |
| rmod_inputbuf[3] = 0xCA; /* trailing signature */ |
| rmod_inputbuf[4] = 0xFE; /* trailing signature */ |
| outputnl("SvarCOM: stack overflow detected, command history flushed (this is not a bug)"); |
| } |
| /* interactive mode: display prompt (if echo enabled) and wait for user |
| * command line */ |
| 886,6 → 886,9 |
|---|
| if (rmod->flags & FLAG_ECHOFLAG) build_and_display_prompt(BUFFER, *rmod_envseg); |
| /* collect user input */ |
| cmdline_getinput(rmod->rmodseg, RMOD_OFFSET_INPUTBUF); |
| /* append stack-overflow detection signature to the end of the input buffer */ |
| rmod_inputbuf[rmod_inputbuf[1] + 3] = 0xCA; /* trailing signature */ |
| rmod_inputbuf[rmod_inputbuf[1] + 4] = 0xFE; /* trailing signature */ |
| /* copy it to local cmdline */ |
| if (rmod_inputbuf[1] != 0) _fmemcpy(cmdline, rmod_inputbuf + 2, rmod_inputbuf[1]); |
| cmdline[rmod_inputbuf[1]] = 0; /* zero-terminate local buff (original is '\r'-terminated) */ |