diff options
Diffstat (limited to 'src/jtag/tcl.c')
| -rw-r--r-- | src/jtag/tcl.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/src/jtag/tcl.c b/src/jtag/tcl.c index 152dd762..abc10062 100644 --- a/src/jtag/tcl.c +++ b/src/jtag/tcl.c @@ -296,6 +296,15 @@ static int jtag_tap_configure_cmd( Jim_GetOptInfo *goi, jtag_tap_t * tap) return JIM_OK; } +static int is_bad_irval(int ir_length, jim_wide w) +{ + jim_wide v = 1; + + v <<= ir_length; + v -= 1; + v = ~v; + return (w & v) != 0; +} extern void jtag_tap_init(jtag_tap_t *tap); extern void jtag_tap_free(jtag_tap_t *tap); @@ -411,22 +420,28 @@ static int jim_newtap_cmd( Jim_GetOptInfo *goi ) Jim_SetResult_sprintf( goi->interp, "option: %s bad parameter", n->name ); return e; } - if( (w < 0) || (w > 0xffff) ){ - /* wacky value */ - Jim_SetResult_sprintf( goi->interp, "option: %s - wacky value: %d (0x%x)", - n->name, (int)(w), (int)(w)); - return JIM_ERR; - } switch(n->value){ case NTAP_OPT_IRLEN: + if (w < (jim_wide) sizeof(pTap->ir_capture_value)) + LOG_WARNING("huge IR length %d", (int) w); pTap->ir_length = w; reqbits &= (~(NTREQ_IRLEN)); break; case NTAP_OPT_IRMASK: + if (is_bad_irval(pTap->ir_length, w)) { + LOG_ERROR("IR mask %x too big", + (int) w); + return ERROR_FAIL; + } pTap->ir_capture_mask = w; reqbits &= (~(NTREQ_IRMASK)); break; case NTAP_OPT_IRCAPTURE: + if (is_bad_irval(pTap->ir_length, w)) { + LOG_ERROR("IR capture %x too big", + (int) w); + return ERROR_FAIL; + } pTap->ir_capture_value = w; reqbits &= (~(NTREQ_IRCAPTURE)); break; |