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git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/BigBuf.c
1 //-----------------------------------------------------------------------------
2 // Jonathan Westhues, Aug 2005
3 // Gerhard de Koning Gans, April 2008, May 2011
5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
6 // at your option, any later version. See the LICENSE.txt file for the text of
8 //-----------------------------------------------------------------------------
9 // BigBuf and functions to allocate/free parts of it.
10 //-----------------------------------------------------------------------------
13 #include "proxmark3.h"
18 // BigBuf is the large multi-purpose buffer, typically used to hold A/D samples or traces.
19 // Also used to hold various smaller buffers and the Mifare Emulator Memory.
21 /* BigBuf memory layout:
22 Pointer to highest available memory: BigBuf_hi
25 reserved = BigBuf_malloc() subtracts amount from BigBuf_hi,
29 // declare it as uint32_t to achieve alignment to 4 Byte boundary
30 static uint32_t BigBuf
[BIGBUF_SIZE
/sizeof(uint32_t)];
33 static uint16_t BigBuf_hi
= BIGBUF_SIZE
;
35 // pointer to the emulator memory.
36 static uint8_t *emulator_memory
= NULL
;
38 // trace related variables
39 static uint16_t traceLen
= 0;
40 int tracing
= 1; //Last global one.. todo static?
42 // get the address of BigBuf
43 uint8_t *BigBuf_get_addr(void)
45 return (uint8_t *)BigBuf
;
49 // get the address of the emulator memory. Allocate part of Bigbuf for it, if not yet done
50 uint8_t *BigBuf_get_EM_addr(void)
53 if (emulator_memory
== NULL
) {
54 emulator_memory
= BigBuf_malloc(CARD_MEMORY_SIZE
);
57 return emulator_memory
;
61 // clear ALL of BigBuf
62 void BigBuf_Clear(void)
64 BigBuf_Clear_ext(true);
66 // clear ALL of BigBuf
67 void BigBuf_Clear_ext(bool verbose
)
69 memset(BigBuf
,0,BIGBUF_SIZE
);
71 Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE
);
73 void BigBuf_Clear_EM(void){
74 memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE
);
77 void BigBuf_Clear_keep_EM(void)
79 memset(BigBuf
,0,BigBuf_hi
);
82 // allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory
83 // at the beginning of BigBuf is always for traces/samples
84 uint8_t *BigBuf_malloc(uint16_t chunksize
)
86 if (BigBuf_hi
- chunksize
< 0) {
87 return NULL
; // no memory left
89 chunksize
= (chunksize
+ 3) & 0xfffc; // round to next multiple of 4
90 BigBuf_hi
-= chunksize
; // aligned to 4 Byte boundary
91 return (uint8_t *)BigBuf
+ BigBuf_hi
;
96 // free ALL allocated chunks. The whole BigBuf is available for traces or samples again.
97 void BigBuf_free(void)
99 BigBuf_hi
= BIGBUF_SIZE
;
100 emulator_memory
= NULL
;
104 // free allocated chunks EXCEPT the emulator memory
105 void BigBuf_free_keep_EM(void)
107 if (emulator_memory
!= NULL
) {
108 BigBuf_hi
= emulator_memory
- (uint8_t *)BigBuf
;
110 BigBuf_hi
= BIGBUF_SIZE
;
114 void BigBuf_print_status(void)
117 Dbprintf(" BIGBUF_SIZE.............%d", BIGBUF_SIZE
);
118 Dbprintf(" Available memory........%d", BigBuf_hi
);
120 Dbprintf(" tracing ................%d", tracing
);
121 Dbprintf(" traceLen ...............%d", traceLen
);
125 // return the maximum trace length (i.e. the unallocated size of BigBuf)
126 uint16_t BigBuf_max_traceLen(void)
135 void set_tracing(bool enable
) {
139 bool get_tracing(void) {
144 * Get the number of bytes traced
147 uint16_t BigBuf_get_traceLen(void)
153 This is a function to store traces. All protocols can use this generic tracer-function.
154 The traces produced by calling this function can be fetched on the client-side
155 by 'hf list raw', alternatively 'hf list <proto>' for protocol-specific
156 annotation of commands/responses.
159 bool RAMFUNC
LogTrace(const uint8_t *btBytes
, uint16_t iLen
, uint32_t timestamp_start
, uint32_t timestamp_end
, uint8_t *parity
, bool readerToTag
)
161 if (!tracing
) return false;
163 uint8_t *trace
= BigBuf_get_addr();
165 uint16_t num_paritybytes
= (iLen
-1)/8 + 1; // number of valid paritybytes in *parity
166 uint16_t duration
= timestamp_end
- timestamp_start
;
168 // Return when trace is full
169 uint16_t max_traceLen
= BigBuf_max_traceLen();
171 if (traceLen
+ sizeof(iLen
) + sizeof(timestamp_start
) + sizeof(duration
) + num_paritybytes
+ iLen
>= max_traceLen
) {
172 tracing
= false; // don't trace any more
176 // 32 bits timestamp (little endian)
177 // 16 bits duration (little endian)
178 // 16 bits data length (little endian, Highest Bit used as readerToTag flag)
180 // x Bytes parity (one byte per 8 bytes data)
183 trace
[traceLen
++] = ((timestamp_start
>> 0) & 0xff);
184 trace
[traceLen
++] = ((timestamp_start
>> 8) & 0xff);
185 trace
[traceLen
++] = ((timestamp_start
>> 16) & 0xff);
186 trace
[traceLen
++] = ((timestamp_start
>> 24) & 0xff);
189 trace
[traceLen
++] = ((duration
>> 0) & 0xff);
190 trace
[traceLen
++] = ((duration
>> 8) & 0xff);
193 trace
[traceLen
++] = ((iLen
>> 0) & 0xff);
194 trace
[traceLen
++] = ((iLen
>> 8) & 0xff);
198 trace
[traceLen
- 1] |= 0x80;
202 if (btBytes
!= NULL
&& iLen
!= 0) {
203 memcpy(trace
+ traceLen
, btBytes
, iLen
);
208 if (num_paritybytes
!= 0) {
209 if (parity
!= NULL
) {
210 memcpy(trace
+ traceLen
, parity
, num_paritybytes
);
212 memset(trace
+ traceLen
, 0x00, num_paritybytes
);
215 traceLen
+= num_paritybytes
;
221 int LogTraceHitag(const uint8_t * btBytes
, int iBits
, int iSamples
, uint32_t dwParity
, int readerToTag
)
224 Todo, rewrite the logger to use the generic functionality instead. It should be noted, however,
225 that this logger takes number of bits as argument, not number of bytes.
228 if (!tracing
) return false;
230 uint8_t *trace
= BigBuf_get_addr();
231 uint16_t iLen
= nbytes(iBits
);
232 // Return when trace is full
233 if (traceLen
+ sizeof(rsamples
) + sizeof(dwParity
) + sizeof(iBits
) + iLen
> BigBuf_max_traceLen()) return false;
235 //Hitag traces appear to use this traceformat:
236 // 32 bits timestamp (little endian,Highest Bit used as readerToTag flag)
238 // 8 bits size (number of bits in the trace entry, not number of bytes)
241 rsamples
+= iSamples
;
242 trace
[traceLen
++] = ((rsamples
>> 0) & 0xff);
243 trace
[traceLen
++] = ((rsamples
>> 8) & 0xff);
244 trace
[traceLen
++] = ((rsamples
>> 16) & 0xff);
245 trace
[traceLen
++] = ((rsamples
>> 24) & 0xff);
248 trace
[traceLen
- 1] |= 0x80;
251 trace
[traceLen
++] = ((dwParity
>> 0) & 0xff);
252 trace
[traceLen
++] = ((dwParity
>> 8) & 0xff);
253 trace
[traceLen
++] = ((dwParity
>> 16) & 0xff);
254 trace
[traceLen
++] = ((dwParity
>> 24) & 0xff);
255 trace
[traceLen
++] = iBits
;
257 memcpy(trace
+ traceLen
, btBytes
, iLen
);
265 uint8_t emlSet(uint8_t *data
, uint32_t offset
, uint32_t length
){
266 uint8_t* mem
= BigBuf_get_EM_addr();
267 if (offset
+length
< CARD_MEMORY_SIZE
) {
268 memcpy(mem
+offset
, data
, length
);
271 Dbprintf("Error, trying to set memory outside of bounds! %d > %d", (offset
+length
), CARD_MEMORY_SIZE
);