1 /* -*- tab-width:8 -*- */
4 Copyright (C) 2011 Peter Zotov <whitequark@whitequark.org>
5 Use of this source code is governed by a BSD-style
6 license that can be found in the LICENSE file.
13 #include <sys/types.h>
14 #include <sys/socket.h>
15 #include <netinet/in.h>
16 #include <arpa/inet.h>
17 #include "gdb-remote.h"
18 #include "stlink-hw.h"
20 static const char hex[] = "0123456789abcdef";
22 // configured for STM32F100RB
23 static const char* const c_memory_map =
24 "<?xml version=\"1.0\"?>"
25 "<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
26 " \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
28 " <memory type=\"rom\" start=\"0x00000000\" length=\"0x100000\"/>" // code
29 " <memory type=\"ram\" start=\"0x20000000\" length=\"0x100000\"/>" // sram
30 " <memory type=\"flash\" start=\"0x08000000\" length=\"0x20000\">" // flash 128k
31 " <property name=\"blocksize\">0x400</property>" // 1k pages
35 int serve(struct stlink* sl, int port);
37 int main(int argc, char** argv) {
39 fprintf(stderr, "Usage: %s <port> /dev/sgX\n", argv[0]);
43 struct stlink *sl = stlink_quirk_open(argv[2], 0);
47 if(stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE)
48 stlink_enter_swd_mode(sl);
51 printf("Debugging ARM core %08x.\n", sl->core_id);
53 int port = atoi(argv[1]);
55 while(serve(sl, port) == 0);
62 int serve(struct stlink* sl, int port) {
63 int sock = socket(AF_INET, SOCK_STREAM, 0);
70 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
72 struct sockaddr_in serv_addr = {0};
73 serv_addr.sin_family = AF_INET;
74 serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
75 serv_addr.sin_port = htons(port);
77 if(bind(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
82 if(listen(sock, 5) < 0) {
87 stlink_force_debug(sl);
90 printf("Listening at *:%d...\n", port);
92 int client = accept(sock, NULL, NULL);
100 printf("GDB connected.\n");
105 int status = gdb_recv_packet(client, &packet);
107 fprintf(stderr, "cannot recv: %d\n", status);
112 printf("recv: %s\n", packet);
119 if(packet[1] == 'P' || packet[1] == 'C' || packet[1] == 'L') {
124 char *separator = strstr(packet, ":"), *params = "";
125 if(separator == NULL) {
126 separator = packet + strlen(packet);
128 params = separator + 1;
131 unsigned queryNameLength = (separator - &packet[1]);
132 char* queryName = calloc(queryNameLength + 1, 1);
133 strncpy(queryName, &packet[1], queryNameLength);
136 printf("query: %s;%s\n", queryName, params);
139 if(!strcmp(queryName, "Supported")) {
140 reply = strdup("PacketSize=3fff;qXfer:memory-map:read+");
141 } else if(!strcmp(queryName, "Xfer")) {
142 char *type, *op, *annex, *s_addr, *s_length;
145 type = strsep(&tok, ":");
146 op = strsep(&tok, ":");
147 annex = strsep(&tok, ":");
148 s_addr = strsep(&tok, ",");
151 unsigned addr = strtoul(s_addr, NULL, 16),
152 length = strtoul(s_length, NULL, 16);
155 printf("Xfer: type:%s;op:%s;annex:%s;addr:%d;length:%d\n",
156 type, op, annex, addr, length);
159 const char* data = NULL;
161 if(!strcmp(type, "memory-map") && !strcmp(op, "read"))
165 unsigned data_length = strlen(data);
166 if(addr + length > data_length)
167 length = data_length - addr;
172 reply = calloc(length + 2, 1);
174 strncpy(&reply[1], data, length);
188 char *separator = strstr(packet, ":"), *params = "";
189 if(separator == NULL) {
190 separator = packet + strlen(packet);
192 params = separator + 1;
195 unsigned cmdNameLength = (separator - &packet[1]);
196 char* cmdName = calloc(cmdNameLength + 1, 1);
197 strncpy(cmdName, &packet[1], cmdNameLength);
199 if(!strcmp(cmdName, "FlashErase")) {
200 char *s_addr, *s_length;
203 s_addr = strsep(&tok, ",");
206 unsigned addr = strtoul(s_addr, NULL, 16),
207 length = strtoul(s_length, NULL, 16);
210 printf("FlashErase: addr:%08x,len:%04x\n",
214 for(stm32_addr_t cur = addr;
215 cur < addr + length; cur += 0x400) {
217 printf("do_erase: %08x\n", cur);
220 stlink_erase_flash_page(sl, cur);
223 reply = strdup("OK");
224 } else if(!strcmp(cmdName, "FlashWrite")) {
228 s_addr = strsep(&tok, ":");
231 unsigned addr = strtoul(s_addr, NULL, 16);
232 unsigned data_length = status - (data - packet);
234 // length of decoded data cannot be more than
235 // encoded, as escapes are removed
236 uint8_t *decoded = calloc(data_length, 1);
237 unsigned dec_index = 0;
238 for(int i = 0; i < data_length; i++) {
239 if(data[i] == 0x7d) {
241 decoded[dec_index++] = data[i] ^ 0x20;
243 decoded[dec_index++] = data[i];
248 printf("binary packet %d -> %d\n", data_length, dec_index);
251 if(!stlink_write_flash(sl, addr, decoded, dec_index) < 0) {
252 fprintf(stderr, "Flash write or verification failed.\n");
253 reply = strdup("E00");
255 reply = strdup("OK");
257 } else if(!strcmp(cmdName, "FlashDone")) {
260 reply = strdup("OK");
274 printf("Core running, waiting for interrupt.\n");
276 int status = gdb_wait_for_interrupt(client);
278 fprintf(stderr, "cannot wait for int: %d\n", status);
282 stlink_force_debug(sl);
284 reply = strdup("S05"); // TRAP
290 reply = strdup("S05"); // TRAP
294 reply = strdup("S05"); // TRAP
298 stlink_read_all_regs(sl);
300 reply = calloc(8 * 16 + 1, 1);
301 for(int i = 0; i < 16; i++)
302 sprintf(&reply[i * 8], "%08x", htonl(sl->reg.r[i]));
307 unsigned id = strtoul(&packet[1], NULL, 16), reg = 0xDEADDEAD;
310 stlink_read_reg(sl, id);
311 reg = htonl(sl->reg.r[id]);
312 } else if(id == 0x19) {
313 stlink_read_reg(sl, 16);
314 reg = htonl(sl->reg.xpsr);
316 reply = strdup("E00");
319 reply = calloc(8 + 1, 1);
320 sprintf(reply, "%08x", reg);
326 char* s_reg = &packet[1];
327 char* s_value = strstr(&packet[1], "=") + 1;
329 unsigned reg = strtoul(s_reg, NULL, 16);
330 unsigned value = strtoul(s_value, NULL, 16);
333 stlink_write_reg(sl, ntohl(value), reg);
334 } else if(reg == 0x19) {
335 stlink_write_reg(sl, ntohl(value), 16);
337 reply = strdup("E00");
341 reply = strdup("OK");
348 for(int i = 0; i < 16; i++) {
350 strncpy(str, &packet[1 + i * 8], 8);
351 uint32_t reg = strtoul(str, NULL, 16);
352 stlink_write_reg(sl, ntohl(reg), i);
355 reply = strdup("OK");
359 char* s_start = &packet[1];
360 char* s_count = strstr(&packet[1], ",") + 1;
362 stm32_addr_t start = strtoul(s_start, NULL, 16);
363 unsigned count = strtoul(s_count, NULL, 16);
365 unsigned adj_start = start % 4;
367 stlink_read_mem32(sl, start - adj_start, (count % 4 == 0) ?
368 count : count + 4 - (count % 4));
370 reply = calloc(count * 2 + 1, 1);
371 for(int i = 0; i < count; i++) {
372 reply[i * 2 + 0] = hex[sl->q_buf[i + adj_start] >> 4];
373 reply[i * 2 + 1] = hex[sl->q_buf[i + adj_start] & 0xf];
380 char* s_start = &packet[1];
381 char* s_count = strstr(&packet[1], ",") + 1;
382 char* hexdata = strstr(packet, ":") + 1;
384 stm32_addr_t start = strtoul(s_start, NULL, 16);
385 unsigned count = strtoul(s_count, NULL, 16);
387 for(int i = 0; i < count; i ++) {
388 char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 };
389 uint8_t byte = strtoul(hex, NULL, 16);
393 if((count % 4) == 0 && (start % 4) == 0) {
394 stlink_write_mem32(sl, start, count);
396 stlink_write_mem8(sl, start, count);
399 reply = strdup("OK");
405 // After this function will be entered afterwards, the
406 // chip will be reset anyway. So this is a no-op.
418 printf("send: %s\n", reply);
421 int result = gdb_send_packet(client, reply);
423 fprintf(stderr, "cannot send: %d\n", result);