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=\"0x20000\"/>" // code = sram or flash
29 " <memory type=\"ram\" start=\"0x20000000\" length=\"0x2000\"/>" // sram 8k
30 " <memory type=\"flash\" start=\"0x08000000\" length=\"0x20000\">" // flash 128k
31 " <property name=\"blocksize\">0x400</property>" // 1k pages
33 " <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
34 " <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
37 int serve(struct stlink* sl, int port);
39 int main(int argc, char** argv) {
41 fprintf(stderr, "Usage: %s <port> /dev/sgX\n", argv[0]);
45 struct stlink *sl = stlink_quirk_open(argv[2], 0);
49 if(stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE)
50 stlink_enter_swd_mode(sl);
53 printf("Debugging ARM core %08x.\n", sl->core_id);
55 int port = atoi(argv[1]);
57 while(serve(sl, port) == 0);
64 int serve(struct stlink* sl, int port) {
65 int sock = socket(AF_INET, SOCK_STREAM, 0);
72 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
74 struct sockaddr_in serv_addr = {0};
75 serv_addr.sin_family = AF_INET;
76 serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
77 serv_addr.sin_port = htons(port);
79 if(bind(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
84 if(listen(sock, 5) < 0) {
89 stlink_force_debug(sl);
92 printf("Listening at *:%d...\n", port);
94 int client = accept(sock, NULL, NULL);
102 printf("GDB connected.\n");
107 int status = gdb_recv_packet(client, &packet);
109 fprintf(stderr, "cannot recv: %d\n", status);
114 printf("recv: %s\n", packet);
121 if(packet[1] == 'P' || packet[1] == 'C' || packet[1] == 'L') {
126 char *separator = strstr(packet, ":"), *params = "";
127 if(separator == NULL) {
128 separator = packet + strlen(packet);
130 params = separator + 1;
133 unsigned queryNameLength = (separator - &packet[1]);
134 char* queryName = calloc(queryNameLength + 1, 1);
135 strncpy(queryName, &packet[1], queryNameLength);
138 printf("query: %s;%s\n", queryName, params);
141 if(!strcmp(queryName, "Supported")) {
142 reply = strdup("PacketSize=3fff;qXfer:memory-map:read+");
143 } else if(!strcmp(queryName, "Xfer")) {
144 char *type, *op, *annex, *s_addr, *s_length;
147 type = strsep(&tok, ":");
148 op = strsep(&tok, ":");
149 annex = strsep(&tok, ":");
150 s_addr = strsep(&tok, ",");
153 unsigned addr = strtoul(s_addr, NULL, 16),
154 length = strtoul(s_length, NULL, 16);
157 printf("Xfer: type:%s;op:%s;annex:%s;addr:%d;length:%d\n",
158 type, op, annex, addr, length);
161 const char* data = NULL;
163 if(!strcmp(type, "memory-map") && !strcmp(op, "read"))
167 unsigned data_length = strlen(data);
168 if(addr + length > data_length)
169 length = data_length - addr;
174 reply = calloc(length + 2, 1);
176 strncpy(&reply[1], data, length);
190 char *separator = strstr(packet, ":"), *params = "";
191 if(separator == NULL) {
192 separator = packet + strlen(packet);
194 params = separator + 1;
197 unsigned cmdNameLength = (separator - &packet[1]);
198 char* cmdName = calloc(cmdNameLength + 1, 1);
199 strncpy(cmdName, &packet[1], cmdNameLength);
201 if(!strcmp(cmdName, "FlashErase")) {
202 char *s_addr, *s_length;
205 s_addr = strsep(&tok, ",");
208 unsigned addr = strtoul(s_addr, NULL, 16),
209 length = strtoul(s_length, NULL, 16);
212 printf("FlashErase: addr:%08x,len:%04x\n",
216 for(stm32_addr_t cur = addr;
217 cur < addr + length; cur += 0x400) {
219 printf("do_erase: %08x\n", cur);
222 stlink_erase_flash_page(sl, cur);
225 reply = strdup("OK");
226 } else if(!strcmp(cmdName, "FlashWrite")) {
230 s_addr = strsep(&tok, ":");
233 unsigned addr = strtoul(s_addr, NULL, 16);
234 unsigned data_length = status - (data - packet);
236 // Length of decoded data cannot be more than
237 // encoded, as escapes are removed.
238 // Additional byte is reserved for alignment fix.
239 uint8_t *decoded = calloc(data_length + 1, 1);
240 unsigned dec_index = 0;
241 for(int i = 0; i < data_length; i++) {
242 if(data[i] == 0x7d) {
244 decoded[dec_index++] = data[i] ^ 0x20;
246 decoded[dec_index++] = data[i];
251 if(dec_index % 2 != 0)
255 printf("binary packet %d -> %d\n", data_length, dec_index);
258 if(!stlink_write_flash(sl, addr, decoded, dec_index) < 0) {
259 fprintf(stderr, "Flash write or verification failed.\n");
260 reply = strdup("E00");
262 reply = strdup("OK");
264 } else if(!strcmp(cmdName, "FlashDone")) {
267 reply = strdup("OK");
281 printf("Core running, waiting for interrupt (either in chip or GDB).\n");
284 int status = gdb_check_for_interrupt(client);
286 fprintf(stderr, "cannot check for int: %d\n", status);
291 stlink_force_debug(sl);
296 if(sl->core_stat == STLINK_CORE_HALTED) {
303 reply = strdup("S05"); // TRAP
309 reply = strdup("S05"); // TRAP
313 reply = strdup("S05"); // TRAP
317 stlink_read_all_regs(sl);
319 reply = calloc(8 * 16 + 1, 1);
320 for(int i = 0; i < 16; i++)
321 sprintf(&reply[i * 8], "%08x", htonl(sl->reg.r[i]));
326 unsigned id = strtoul(&packet[1], NULL, 16), reg = 0xDEADDEAD;
329 stlink_read_reg(sl, id);
330 reg = htonl(sl->reg.r[id]);
331 } else if(id == 0x19) {
332 stlink_read_reg(sl, 16);
333 reg = htonl(sl->reg.xpsr);
335 reply = strdup("E00");
338 reply = calloc(8 + 1, 1);
339 sprintf(reply, "%08x", reg);
345 char* s_reg = &packet[1];
346 char* s_value = strstr(&packet[1], "=") + 1;
348 unsigned reg = strtoul(s_reg, NULL, 16);
349 unsigned value = strtoul(s_value, NULL, 16);
352 stlink_write_reg(sl, ntohl(value), reg);
353 } else if(reg == 0x19) {
354 stlink_write_reg(sl, ntohl(value), 16);
356 reply = strdup("E00");
360 reply = strdup("OK");
367 for(int i = 0; i < 16; i++) {
369 strncpy(str, &packet[1 + i * 8], 8);
370 uint32_t reg = strtoul(str, NULL, 16);
371 stlink_write_reg(sl, ntohl(reg), i);
374 reply = strdup("OK");
378 char* s_start = &packet[1];
379 char* s_count = strstr(&packet[1], ",") + 1;
381 stm32_addr_t start = strtoul(s_start, NULL, 16);
382 unsigned count = strtoul(s_count, NULL, 16);
384 unsigned adj_start = start % 4;
386 stlink_read_mem32(sl, start - adj_start, (count % 4 == 0) ?
387 count : count + 4 - (count % 4));
389 reply = calloc(count * 2 + 1, 1);
390 for(int i = 0; i < count; i++) {
391 reply[i * 2 + 0] = hex[sl->q_buf[i + adj_start] >> 4];
392 reply[i * 2 + 1] = hex[sl->q_buf[i + adj_start] & 0xf];
399 char* s_start = &packet[1];
400 char* s_count = strstr(&packet[1], ",") + 1;
401 char* hexdata = strstr(packet, ":") + 1;
403 stm32_addr_t start = strtoul(s_start, NULL, 16);
404 unsigned count = strtoul(s_count, NULL, 16);
406 for(int i = 0; i < count; i ++) {
407 char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 };
408 uint8_t byte = strtoul(hex, NULL, 16);
412 if((count % 4) == 0 && (start % 4) == 0) {
413 stlink_write_mem32(sl, start, count);
415 stlink_write_mem8(sl, start, count);
418 reply = strdup("OK");
424 // After this function will be entered afterwards, the
425 // chip will be reset anyway. So this is a no-op.
437 printf("send: %s\n", reply);
440 int result = gdb_send_packet(client, reply);
442 fprintf(stderr, "cannot send: %d\n", result);