/* BigBuf memory layout:
Pointer to highest available memory: BigBuf_hi
- high BIGBUF_SIZE
- reserved = BigBuf_malloc() subtracts amount from BigBuf_hi,
+ high BIGBUF_SIZE
+ reserved = BigBuf_malloc() subtracts amount from BigBuf_hi,
low 0x00
*/
static uint8_t *emulator_memory = NULL;
// trace related variables
-static uint16_t traceLen = 0;
-int tracing = 1; //Last global one.. todo static?
+static uint32_t traceLen = 0;
+static bool tracing = true;
+
// get the address of BigBuf
uint8_t *BigBuf_get_addr(void)
if (emulator_memory == NULL) {
emulator_memory = BigBuf_malloc(CARD_MEMORY_SIZE);
}
-
+
return emulator_memory;
}
{
BigBuf_Clear_ext(true);
}
+
+
// clear ALL of BigBuf
void BigBuf_Clear_ext(bool verbose)
{
- memset(BigBuf,0,BIGBUF_SIZE);
- if (verbose)
- Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
+ memset(BigBuf, 0, BIGBUF_SIZE);
+ if (verbose)
+ Dbprintf("Buffer cleared (%i bytes)", BIGBUF_SIZE);
}
+
+
void BigBuf_Clear_EM(void){
memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE);
}
+
void BigBuf_Clear_keep_EM(void)
{
- memset(BigBuf,0,BigBuf_hi);
+ memset(BigBuf, 0, BigBuf_hi);
}
// allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory
// at the beginning of BigBuf is always for traces/samples
uint8_t *BigBuf_malloc(uint16_t chunksize)
{
- if (BigBuf_hi - chunksize < 0) {
- return NULL; // no memory left
+ if (BigBuf_hi - chunksize < 0) {
+ return NULL; // no memory left
} else {
- chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4
- BigBuf_hi -= chunksize; // aligned to 4 Byte boundary
+ chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4
+ BigBuf_hi -= chunksize; // aligned to 4 Byte boundary
return (uint8_t *)BigBuf + BigBuf_hi;
}
}
return BigBuf_hi;
}
+
void clear_trace() {
traceLen = 0;
}
+
void set_tracing(bool enable) {
tracing = enable;
}
+
bool get_tracing(void) {
return tracing;
}
+
/**
* Get the number of bytes traced
* @return
return traceLen;
}
+
/**
This is a function to store traces. All protocols can use this generic tracer-function.
The traces produced by calling this function can be fetched on the client-side
uint8_t *trace = BigBuf_get_addr();
- uint16_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity
- uint16_t duration = timestamp_end - timestamp_start;
+ uint32_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity
+ uint32_t duration = timestamp_end - timestamp_start;
// Return when trace is full
uint16_t max_traceLen = BigBuf_max_traceLen();
if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= max_traceLen) {
- tracing = false; // don't trace any more
+ tracing = false; // don't trace any more
return false;
}
// Traceformat:
// data bytes
if (btBytes != NULL && iLen != 0) {
- memcpy(trace + traceLen, btBytes, iLen);
+ for (int i = 0; i < iLen; i++) {
+ trace[traceLen++] = *btBytes++;
+ }
}
- traceLen += iLen;
// parity bytes
if (num_paritybytes != 0) {
if (parity != NULL) {
- memcpy(trace + traceLen, parity, num_paritybytes);
+ for (int i = 0; i < num_paritybytes; i++) {
+ trace[traceLen++] = *parity++;
+ }
} else {
- memset(trace + traceLen, 0x00, num_paritybytes);
+ for (int i = 0; i < num_paritybytes; i++) {
+ trace[traceLen++] = 0x00;
+ }
}
}
- traceLen += num_paritybytes;
return true;
}
uint8_t *trace = BigBuf_get_addr();
uint16_t iLen = nbytes(iBits);
+
// Return when trace is full
- if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) return false;
+ if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) {
+ return false;
+ }
//Hitag traces appear to use this traceformat:
// 32 bits timestamp (little endian,Highest Bit used as readerToTag flag)
// 8 bits size (number of bits in the trace entry, not number of bytes)
// y Bytes data
+
+
rsamples += iSamples;
trace[traceLen++] = ((rsamples >> 0) & 0xff);
trace[traceLen++] = ((rsamples >> 8) & 0xff);
trace[traceLen++] = ((dwParity >> 24) & 0xff);
trace[traceLen++] = iBits;
- memcpy(trace + traceLen, btBytes, iLen);
- traceLen += iLen;
+ for (int i = 0; i < iLen; i++) {
+ trace[traceLen++] = *btBytes++;
+ }
return true;
}