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gdb-server.c
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gdb-server.c
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/*
* Copyright (c) 2011 Peter Zotov <whitequark@whitequark.org>
* Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
*/
#include <ctype.h>
#include <getopt.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#if defined(_MSC_VER)
#include <stdbool.h>
#define __attribute__(x)
#endif
#if defined(_WIN32)
#include <win32_socket.h>
#else
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#include <stlink.h>
#include <logging.h>
#include "gdb-remote.h"
#include "gdb-server.h"
#include "semihosting.h"
#define FLASH_BASE 0x08000000
// Semihosting doesn't have a short option, we define a value to identify it
#define SEMIHOSTING_OPTION 128
#define SERIAL_OPTION 127
// always update the FLASH_PAGE before each use, by calling stlink_calculate_pagesize
#define FLASH_PAGE (sl->flash_pgsz)
static stlink_t *connected_stlink = NULL;
static bool semihosting = false;
static bool serial_specified = false;
static char serialnumber[28] = {0};
#if defined(_WIN32)
#define close_socket win32_close_socket
#define IS_SOCK_VALID(__sock) ((__sock) != INVALID_SOCKET)
#else
#define close_socket close
#define SOCKET int
#define IS_SOCK_VALID(__sock) ((__sock) > 0)
#endif
static const char hex[] = "0123456789abcdef";
static const char* current_memory_map = NULL;
typedef struct _st_state_t {
// things from command line, bleh
int logging_level;
int listen_port;
int persistent;
int reset;
} st_state_t;
int serve(stlink_t *sl, st_state_t *st);
char* make_memory_map(stlink_t *sl);
static void init_cache(stlink_t *sl);
static void cleanup(int signum) {
(void)signum;
if (connected_stlink) {
// Switch back to mass storage mode before closing
stlink_run(connected_stlink);
stlink_exit_debug_mode(connected_stlink);
stlink_close(connected_stlink);
}
exit(1);
}
static stlink_t* do_connect(st_state_t *st) {
stlink_t *sl = NULL;
if (serial_specified) {
sl = stlink_open_usb(st->logging_level, st->reset, serialnumber, 0);
} else {
sl = stlink_open_usb(st->logging_level, st->reset, NULL, 0);
}
return(sl);
}
int parse_options(int argc, char** argv, st_state_t *st) {
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"verbose", optional_argument, NULL, 'v'},
{"listen_port", required_argument, NULL, 'p'},
{"multi", optional_argument, NULL, 'm'},
{"no-reset", optional_argument, NULL, 'n'},
{"version", no_argument, NULL, 'V'},
{"semihosting", no_argument, NULL, SEMIHOSTING_OPTION},
{"serial", required_argument, NULL, SERIAL_OPTION},
{0, 0, 0, 0},
};
const char * help_str = "%s - usage:\n\n"
" -h, --help\t\tPrint this help\n"
" -V, --version\t\tPrint the version\n"
" -vXX, --verbose=XX\tSpecify a specific verbosity level (0..99)\n"
" -v, --verbose\t\tSpecify generally verbose logging\n"
"\t\t\tChoose what version of stlink to use, (defaults to 2)\n"
" -1, --stlinkv1\tForce stlink version 1\n"
" -p 4242, --listen_port=1234\n"
"\t\t\tSet the gdb server listen port. "
"(default port: " STRINGIFY(DEFAULT_GDB_LISTEN_PORT) ")\n"
" -m, --multi\n"
"\t\t\tSet gdb server to extended mode.\n"
"\t\t\tst-util will continue listening for connections after disconnect.\n"
" -n, --no-reset\n"
"\t\t\tDo not reset board on connection.\n"
" --semihosting\n"
"\t\t\tEnable semihosting support.\n"
" --serial <serial>\n"
"\t\t\tUse a specific serial number.\n"
"\n"
"The STLINK device to use can be specified in the environment\n"
"variable STLINK_DEVICE on the format <USB_BUS>:<USB_ADDR>.\n"
"\n"
;
int option_index = 0;
int c;
int q;
while ((c = getopt_long(argc, argv, "hv::p:mn", long_options, &option_index)) != -1)
switch (c) {
case 0:
break;
case 'h':
printf(help_str, argv[0]);
exit(EXIT_SUCCESS);
break;
case 'v':
if (optarg) {
st->logging_level = atoi(optarg);
} else {
st->logging_level = DEBUG_LOGGING_LEVEL;
}
break;
case 'p':
sscanf(optarg, "%i", &q);
if (q < 0) {
fprintf(stderr, "Can't use a negative port to listen on: %d\n", q);
exit(EXIT_FAILURE);
}
st->listen_port = q;
break;
case 'm':
st->persistent = 1;
break;
case 'n':
st->reset = 0;
break;
case 'V':
printf("v%s\n", STLINK_VERSION);
exit(EXIT_SUCCESS);
case SEMIHOSTING_OPTION:
semihosting = true;
break;
case SERIAL_OPTION:
printf("use serial %s\n", optarg);
/* TODO: This is not really portable, as strlen really returns size_t,
* we need to obey and not cast it to a signed type.
*/
int j = (int)strlen(optarg);
int length = j / 2; // the length of the destination-array
if (j % 2 != 0) { return(-1); }
for (size_t k = 0; j >= 0 && k < sizeof(serialnumber); ++k, j -= 2) {
char buffer[3] = {0};
memcpy(buffer, optarg + j, 2);
serialnumber[length - k] = (uint8_t)strtol(buffer, NULL, 16);
}
serial_specified = true;
break;
}
if (optind < argc) {
printf("non-option ARGV-elements: ");
while (optind < argc) { printf("%s ", argv[optind++]); }
printf("\n");
}
return(0);
}
int main(int argc, char** argv) {
stlink_t *sl = NULL;
st_state_t state;
memset(&state, 0, sizeof(state));
// set defaults ...
state.logging_level = DEFAULT_LOGGING_LEVEL;
state.listen_port = DEFAULT_GDB_LISTEN_PORT;
state.reset = 1; // by default, reset board
parse_options(argc, argv, &state);
printf("st-util\n");
sl = do_connect(&state);
if (sl == NULL) { return(1); }
if (sl->chip_id == STLINK_CHIPID_UNKNOWN) {
ELOG("Unsupported Target (Chip ID is %#010x, Core ID is %#010x).\n", sl->chip_id, sl->core_id);
return(1);
}
connected_stlink = sl;
signal(SIGINT, &cleanup);
signal(SIGTERM, &cleanup);
signal(SIGSEGV, &cleanup);
if (state.reset) { stlink_reset(sl); }
DLOG("Chip ID is %#010x, Core ID is %#08x.\n", sl->chip_id, sl->core_id);
sl->verbose = 0;
current_memory_map = make_memory_map(sl);
#if defined(_WIN32)
WSADATA wsadata;
if (WSAStartup(MAKEWORD(2, 2), &wsadata) != 0) { goto winsock_error; }
#endif
init_cache(sl);
do { // don't go beserk if serve() returns with error
if (serve(sl, &state)) { usleep (1 * 1000); }
sl = connected_stlink; // in case serve() changed the connection
stlink_run(sl); // continue
} while (state.persistent);
#if defined(_WIN32)
winsock_error:
WSACleanup();
#endif
// switch back to mass storage mode before closing
stlink_exit_debug_mode(sl);
stlink_close(sl);
return(0);
}
static const char* const target_description_F4 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
"<target version=\"1.0\">"
" <architecture>arm</architecture>"
" <feature name=\"org.gnu.gdb.arm.m-profile\">"
" <reg name=\"r0\" bitsize=\"32\"/>"
" <reg name=\"r1\" bitsize=\"32\"/>"
" <reg name=\"r2\" bitsize=\"32\"/>"
" <reg name=\"r3\" bitsize=\"32\"/>"
" <reg name=\"r4\" bitsize=\"32\"/>"
" <reg name=\"r5\" bitsize=\"32\"/>"
" <reg name=\"r6\" bitsize=\"32\"/>"
" <reg name=\"r7\" bitsize=\"32\"/>"
" <reg name=\"r8\" bitsize=\"32\"/>"
" <reg name=\"r9\" bitsize=\"32\"/>"
" <reg name=\"r10\" bitsize=\"32\"/>"
" <reg name=\"r11\" bitsize=\"32\"/>"
" <reg name=\"r12\" bitsize=\"32\"/>"
" <reg name=\"sp\" bitsize=\"32\" type=\"data_ptr\"/>"
" <reg name=\"lr\" bitsize=\"32\"/>"
" <reg name=\"pc\" bitsize=\"32\" type=\"code_ptr\"/>"
" <reg name=\"xpsr\" bitsize=\"32\" regnum=\"25\"/>"
" <reg name=\"msp\" bitsize=\"32\" regnum=\"26\" type=\"data_ptr\" group=\"general\" />"
" <reg name=\"psp\" bitsize=\"32\" regnum=\"27\" type=\"data_ptr\" group=\"general\" />"
" <reg name=\"control\" bitsize=\"8\" regnum=\"28\" type=\"int\" group=\"general\" />"
" <reg name=\"faultmask\" bitsize=\"8\" regnum=\"29\" type=\"int\" group=\"general\" />"
" <reg name=\"basepri\" bitsize=\"8\" regnum=\"30\" type=\"int\" group=\"general\" />"
" <reg name=\"primask\" bitsize=\"8\" regnum=\"31\" type=\"int\" group=\"general\" />"
" <reg name=\"s0\" bitsize=\"32\" regnum=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s1\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s2\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s3\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s4\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s5\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s6\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s7\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s8\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s9\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s10\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s11\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s12\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s13\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s14\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s15\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s16\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s17\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s18\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s19\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s20\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s21\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s22\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s23\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s24\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s25\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s26\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s27\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s28\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s29\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s30\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"s31\" bitsize=\"32\" type=\"float\" group=\"float\" />"
" <reg name=\"fpscr\" bitsize=\"32\" type=\"int\" group=\"float\" />"
" </feature>"
"</target>";
static const char* const memory_map_template_F4 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x100000\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x10000\"/>" // ccm ram
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x20000\"/>" // sram
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x10000\">" // Sectors 0..3
" <property name=\"blocksize\">0x4000</property>" // 16kB
" </memory>"
" <memory type=\"flash\" start=\"0x08010000\" length=\"0x10000\">" // Sector 4
" <property name=\"blocksize\">0x10000</property>" // 64kB
" </memory>"
" <memory type=\"flash\" start=\"0x08020000\" length=\"0xE0000\">" // Sectors 5..11
" <property name=\"blocksize\">0x20000</property>" // 128kB
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0x60000000\" length=\"0x7fffffff\"/>" // AHB3 Peripherals
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x7800\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fffc000\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_F4_HD =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x100000\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x10000\"/>" // ccm ram
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x40000\"/>" // sram
" <memory type=\"ram\" start=\"0x60000000\" length=\"0x10000000\"/>" // fmc bank 1 (nor/psram/sram)
" <memory type=\"ram\" start=\"0x70000000\" length=\"0x20000000\"/>" // fmc bank 2 & 3 (nand flash)
" <memory type=\"ram\" start=\"0x90000000\" length=\"0x10000000\"/>" // fmc bank 4 (pc card)
" <memory type=\"ram\" start=\"0xC0000000\" length=\"0x20000000\"/>" // fmc sdram bank 1 & 2
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x10000\">" // Sectors 0..3
" <property name=\"blocksize\">0x4000</property>" // 16kB
" </memory>"
" <memory type=\"flash\" start=\"0x08010000\" length=\"0x10000\">" // Sector 4
" <property name=\"blocksize\">0x10000</property>" // 64kB
" </memory>"
" <memory type=\"flash\" start=\"0x08020000\" length=\"0xE0000\">" // Sectors 5..11
" <property name=\"blocksize\">0x20000</property>" // 128kB
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x7800\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fffc000\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_F2 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x%x\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x%x\"/>" // sram
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x10000\">" // Sectors 0..3
" <property name=\"blocksize\">0x4000</property>" // 16kB
" </memory>"
" <memory type=\"flash\" start=\"0x08010000\" length=\"0x10000\">" // Sector 4
" <property name=\"blocksize\">0x10000</property>" // 64kB
" </memory>"
" <memory type=\"flash\" start=\"0x08020000\" length=\"0x%x\">" // Sectors 5..
" <property name=\"blocksize\">0x20000</property>" // 128kB
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x%08x\" length=\"0x%x\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fffc000\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_L4 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x%x\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x8000\"/>" // SRAM2 (32kB)
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x18000\"/>" // SRAM1 (96kB)
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x%x\">"
" <property name=\"blocksize\">0x800</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0x60000000\" length=\"0x7fffffff\"/>" // AHB3 Peripherals
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x7000\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fff7800\" length=\"0x10\"/>" // option byte area
" <memory type=\"rom\" start=\"0x1ffff800\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_L496 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x%x\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x10000\"/>" // SRAM2 (64kB)
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x50000\"/>" // SRAM1 + aliased SRAM2 (256 + 64 = 320kB)
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x%x\">"
" <property name=\"blocksize\">0x800</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0x60000000\" length=\"0x7fffffff\"/>" // AHB3 Peripherals
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x7000\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fff7800\" length=\"0x10\"/>" // option byte area
" <memory type=\"rom\" start=\"0x1ffff800\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x%x\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x%x\"/>" // sram 8kB
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x%x\">"
" <property name=\"blocksize\">0x%x</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x%08x\" length=\"0x%x\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1ffff800\" length=\"0x10\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_F7 =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"ram\" start=\"0x00000000\" length=\"0x4000\"/>" // ITCM ram 16kB
" <memory type=\"rom\" start=\"0x00200000\" length=\"0x100000\"/>" // ITCM flash
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x%x\"/>" // sram
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x20000\">" // Sectors 0..3
" <property name=\"blocksize\">0x8000</property>" // 32kB
" </memory>"
" <memory type=\"flash\" start=\"0x08020000\" length=\"0x20000\">" // Sector 4
" <property name=\"blocksize\">0x20000</property>" // 128kB
" </memory>"
" <memory type=\"flash\" start=\"0x08040000\" length=\"0xC0000\">" // Sectors 5..7
" <property name=\"blocksize\">0x40000</property>" // 128kB
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0x60000000\" length=\"0x7fffffff\"/>" // AHB3 Peripherals
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x00100000\" length=\"0xEDC0\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x20\"/>" // option byte area
"</memory-map>";
static const char* const memory_map_template_F4_DE =
"<?xml version=\"1.0\"?>"
"<!DOCTYPE memory-map PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"
"<memory-map>"
" <memory type=\"rom\" start=\"0x00000000\" length=\"0x80000\"/>" // code = sram, bootrom or flash; flash is bigger
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x18000\"/>" // sram
" <memory type=\"flash\" start=\"0x08000000\" length=\"0x10000\">" // Sectors 0..3
" <property name=\"blocksize\">0x4000</property>" // 16kB
" </memory>"
" <memory type=\"flash\" start=\"0x08010000\" length=\"0x10000\">" // Sector 4
" <property name=\"blocksize\">0x10000</property>" // 64kB
" </memory>"
" <memory type=\"flash\" start=\"0x08020000\" length=\"0x60000\">" // Sectors 5..7
" <property name=\"blocksize\">0x20000</property>" // 128kB
" </memory>"
" <memory type=\"ram\" start=\"0x40000000\" length=\"0x1fffffff\"/>" // peripheral regs
" <memory type=\"ram\" start=\"0xe0000000\" length=\"0x1fffffff\"/>" // cortex regs
" <memory type=\"rom\" start=\"0x1fff0000\" length=\"0x7800\"/>" // bootrom
" <memory type=\"rom\" start=\"0x1fff7800\" length=\"0x210\"/>" // otp
" <memory type=\"rom\" start=\"0x1fffc000\" length=\"0x10\"/>" // option byte area
"</memory-map>";
char* make_memory_map(stlink_t *sl) {
// this will be freed in serve()
const size_t sz = 4096;
char* map = malloc(sz);
map[0] = '\0';
if (sl->chip_id == STLINK_CHIPID_STM32_F4 ||
sl->chip_id == STLINK_CHIPID_STM32_F446 ||
sl->chip_id == STLINK_CHIPID_STM32_F411RE) {
strcpy(map, memory_map_template_F4);
} else if (sl->chip_id == STLINK_CHIPID_STM32_F4_DE) {
strcpy(map, memory_map_template_F4_DE);
} else if (sl->core_id == STM32F7_CORE_ID) {
snprintf(map, sz, memory_map_template_F7,
(unsigned int)sl->sram_size);
} else if (sl->chip_id == STLINK_CHIPID_STM32_F4_HD) {
strcpy(map, memory_map_template_F4_HD);
} else if (sl->chip_id == STLINK_CHIPID_STM32_F2) {
snprintf(map, sz, memory_map_template_F2,
(unsigned int)sl->flash_size,
(unsigned int)sl->sram_size,
(unsigned int)sl->flash_size - 0x20000,
(unsigned int)sl->sys_base,
(unsigned int)sl->sys_size);
} else if ((sl->chip_id == STLINK_CHIPID_STM32_L4) ||
(sl->chip_id == STLINK_CHIPID_STM32_L43X) ||
(sl->chip_id == STLINK_CHIPID_STM32_L46X)) {
snprintf(map, sz, memory_map_template_L4,
(unsigned int)sl->flash_size,
(unsigned int)sl->flash_size);
} else if (sl->chip_id == STLINK_CHIPID_STM32_L496X) {
snprintf(map, sz, memory_map_template_L496,
(unsigned int)sl->flash_size,
(unsigned int)sl->flash_size);
} else {
snprintf(map, sz, memory_map_template,
(unsigned int)sl->flash_size,
(unsigned int)sl->sram_size,
(unsigned int)sl->flash_size,
(unsigned int)sl->flash_pgsz,
(unsigned int)sl->sys_base,
(unsigned int)sl->sys_size);
}
return(map);
}
/*
* DWT_COMP0 0xE0001020
* DWT_MASK0 0xE0001024
* DWT_FUNCTION0 0xE0001028
* DWT_COMP1 0xE0001030
* DWT_MASK1 0xE0001034
* DWT_FUNCTION1 0xE0001038
* DWT_COMP2 0xE0001040
* DWT_MASK2 0xE0001044
* DWT_FUNCTION2 0xE0001048
* DWT_COMP3 0xE0001050
* DWT_MASK3 0xE0001054
* DWT_FUNCTION3 0xE0001058
*/
#define DATA_WATCH_NUM 4
enum watchfun { WATCHDISABLED = 0, WATCHREAD = 5, WATCHWRITE = 6, WATCHACCESS = 7 };
struct code_hw_watchpoint {
stm32_addr_t addr;
uint8_t mask;
enum watchfun fun;
};
static struct code_hw_watchpoint data_watches[DATA_WATCH_NUM];
static void init_data_watchpoints(stlink_t *sl) {
uint32_t data;
DLOG("init watchpoints\n");
stlink_read_debug32(sl, 0xE000EDFC, &data);
data |= 1 << 24;
// set trcena in debug command to turn on dwt unit
stlink_write_debug32(sl, 0xE000EDFC, data);
// make sure all watchpoints are cleared
for (int i = 0; i < DATA_WATCH_NUM; i++) {
data_watches[i].fun = WATCHDISABLED;
stlink_write_debug32(sl, 0xe0001028 + i * 16, 0);
}
}
static int add_data_watchpoint(stlink_t *sl, enum watchfun wf, stm32_addr_t addr, unsigned int len) {
int i = 0;
uint32_t mask, dummy;
// computer mask
// find a free watchpoint
// configure
mask = -1;
i = len;
while (i) {
i >>= 1;
mask++;
}
if ((mask != (uint32_t)-1) && (mask < 16)) {
for (i = 0; i < DATA_WATCH_NUM; i++)
// is this an empty slot ?
if (data_watches[i].fun == WATCHDISABLED) {
DLOG("insert watchpoint %d addr %x wf %u mask %u len %d\n", i, addr, wf, mask, len);
data_watches[i].fun = wf;
data_watches[i].addr = addr;
data_watches[i].mask = mask;
// insert comparator address
stlink_write_debug32(sl, 0xE0001020 + i * 16, addr);
// insert mask
stlink_write_debug32(sl, 0xE0001024 + i * 16, mask);
// insert function
stlink_write_debug32(sl, 0xE0001028 + i * 16, wf);
// just to make sure the matched bit is clear !
stlink_read_debug32(sl, 0xE0001028 + i * 16, &dummy);
return(0);
}
}
DLOG("failure: add watchpoints addr %x wf %u len %u\n", addr, wf, len);
return(-1);
}
static int delete_data_watchpoint(stlink_t *sl, stm32_addr_t addr) {
int i;
for (i = 0; i < DATA_WATCH_NUM; i++) {
if ((data_watches[i].addr == addr) && (data_watches[i].fun != WATCHDISABLED)) {
DLOG("delete watchpoint %d addr %x\n", i, addr);
data_watches[i].fun = WATCHDISABLED;
stlink_write_debug32(sl, 0xe0001028 + i * 16, 0);
return(0);
}
}
DLOG("failure: delete watchpoint addr %x\n", addr);
return(-1);
}
static int code_break_num;
static int code_lit_num;
#define CODE_BREAK_NUM_MAX 15
#define CODE_BREAK_LOW 0x01
#define CODE_BREAK_HIGH 0x02
struct code_hw_breakpoint {
stm32_addr_t addr;
int type;
};
static struct code_hw_breakpoint code_breaks[CODE_BREAK_NUM_MAX];
static void init_code_breakpoints(stlink_t *sl) {
unsigned int val;
memset(sl->q_buf, 0, 4);
stlink_write_debug32(sl, STLINK_REG_CM3_FP_CTRL, 0x03 /* KEY | ENABLE4 */);
stlink_read_debug32(sl, STLINK_REG_CM3_FP_CTRL, &val);
code_break_num = ((val >> 4) & 0xf);
code_lit_num = ((val >> 8) & 0xf);
ILOG("Found %i hw breakpoint registers\n", code_break_num);
for (int i = 0; i < code_break_num; i++) {
code_breaks[i].type = 0;
stlink_write_debug32(sl, STLINK_REG_CM3_FP_COMP0 + i * 4, 0);
}
}
static int has_breakpoint(stm32_addr_t addr) {
for (int i = 0; i < code_break_num; i++)
if (code_breaks[i].addr == addr) { return(1); }
return(0);
}
static int update_code_breakpoint(stlink_t *sl, stm32_addr_t addr, int set) {
stm32_addr_t fpb_addr;
uint32_t mask;
int type = (addr & 0x2) ? CODE_BREAK_HIGH : CODE_BREAK_LOW;
if (addr & 1) {
ELOG("update_code_breakpoint: unaligned address %08x\n", addr);
return(-1);
}
if (sl->core_id == STM32F7_CORE_ID) {
fpb_addr = addr;
} else {
fpb_addr = addr & ~0x3;
}
int id = -1;
for (int i = 0; i < code_break_num; i++)
if (fpb_addr == code_breaks[i].addr || (set && code_breaks[i].type == 0)) {
id = i;
break;
}
if (id == -1) {
if (set) {
return(-1);
} // free slot not found
else {
return(0);
} // breakpoint is already removed
}
struct code_hw_breakpoint* bp = &code_breaks[id];
bp->addr = fpb_addr;
if (sl->core_id == STM32F7_CORE_ID) {
if (set) {
bp->type = type;
} else {
bp->type = 0;
}
mask = (bp->addr) | 1;
} else {
if (set) {
bp->type |= type;
} else {
bp->type &= ~type;
}
mask = (bp->addr) | 1 | (bp->type << 30);
}
if (bp->type == 0) {
DLOG("clearing hw break %d\n", id);
stlink_write_debug32(sl, 0xe0002008 + id * 4, 0);
} else {
DLOG("setting hw break %d at %08x (%d)\n", id, bp->addr, bp->type);
DLOG("reg %08x \n", mask);
stlink_write_debug32(sl, 0xe0002008 + id * 4, mask);
}
return(0);
}
struct flash_block {
stm32_addr_t addr;
unsigned length;
uint8_t* data;
struct flash_block* next;
};
static struct flash_block* flash_root;
static int flash_add_block(stm32_addr_t addr, unsigned length, stlink_t *sl) {
if (addr < FLASH_BASE || addr + length > FLASH_BASE + sl->flash_size) {
ELOG("flash_add_block: incorrect bounds\n");
return(-1);
}
stlink_calculate_pagesize(sl, addr);
if (addr % FLASH_PAGE != 0 || length % FLASH_PAGE != 0) {
ELOG("flash_add_block: unaligned block\n");
return(-1);
}
struct flash_block* new = malloc(sizeof(struct flash_block));
new->next = flash_root;
new->addr = addr;
new->length = length;
new->data = calloc(length, 1);
flash_root = new;
return(0);
}
static int flash_populate(stm32_addr_t addr, uint8_t* data, unsigned length) {
unsigned int fit_blocks = 0, fit_length = 0;
for (struct flash_block* fb = flash_root; fb; fb = fb->next) {
/*
* Block: ------X------Y--------
* Data: a-----b
* a--b
* a-----------b
* Block intersects with data, if:
* a < Y && b > x
*/
unsigned X = fb->addr, Y = fb->addr + fb->length;
unsigned a = addr, b = addr + length;
if (a < Y && b > X) {
// from start of the block
unsigned start = (a > X ? a : X) - X;
unsigned end = (b > Y ? Y : b) - X;
memcpy(fb->data + start, data, end - start);
fit_blocks++;
fit_length += end - start;
}
}
if (fit_blocks == 0) {
ELOG("Unfit data block %08x -> %04x\n", addr, length);
return(-1);
}
if (fit_length != length) {
WLOG("data block %08x -> %04x truncated to %04x\n", addr, length, fit_length);
WLOG("(this is not an error, just a GDB glitch)\n");
}
return(0);
}
static int flash_go(stlink_t *sl) {
int error = -1;
// some kinds of clock settings do not allow writing to flash.
stlink_reset(sl);
stlink_force_debug(sl);
for (struct flash_block* fb = flash_root; fb; fb = fb->next) {
DLOG("flash_do: block %08x -> %04x\n", fb->addr, fb->length);
for (stm32_addr_t page = fb->addr; page < fb->addr + fb->length; page += (uint32_t)FLASH_PAGE) {
unsigned length = fb->length - (page - fb->addr);
// update FLASH_PAGE
stlink_calculate_pagesize(sl, page);
DLOG("flash_do: page %08x\n", page);
unsigned len = (length > FLASH_PAGE) ? (unsigned int)FLASH_PAGE : length;
int ret = stlink_write_flash(sl, page, fb->data + (page - fb->addr), len, 0);
if (ret < 0) { goto error; }
}
}
stlink_reset(sl);
error = 0;
error:
for (struct flash_block* fb = flash_root, *next; fb; fb = next) {
next = fb->next;
free(fb->data);
free(fb);
}
flash_root = NULL;
return(error);
}
#define CLIDR 0xE000ED78
#define CTR 0xE000ED7C
#define CCSIDR 0xE000ED80
#define CSSELR 0xE000ED84
#define CCR 0xE000ED14
#define CCR_DC (1 << 16)
#define CCR_IC (1 << 17)
#define DCCSW 0xE000EF6C
#define ICIALLU 0xE000EF50
struct cache_level_desc {
unsigned int nsets;
unsigned int nways;
unsigned int log2_nways;
unsigned int width;
};
struct cache_desc_t {
// minimal line size in bytes
unsigned int dminline;
unsigned int iminline;
// last level of unification (uniprocessor)
unsigned int louu;
struct cache_level_desc icache[7];
struct cache_level_desc dcache[7];
};
static struct cache_desc_t cache_desc;
// return the smallest R so that V <= (1 << R); not performance critical
static unsigned ceil_log2(unsigned v) {
unsigned res;
for (res = 0; (1U << res) < v; res++);
return(res);
}
static void read_cache_level_desc(stlink_t *sl, struct cache_level_desc *desc) {
unsigned int ccsidr;
unsigned int log2_nsets;
stlink_read_debug32(sl, CCSIDR, &ccsidr);
desc->nsets = ((ccsidr >> 13) & 0x3fff) + 1;
desc->nways = ((ccsidr >> 3) & 0x1ff) + 1;
desc->log2_nways = ceil_log2 (desc->nways);
log2_nsets = ceil_log2 (desc->nsets);
desc->width = 4 + (ccsidr & 7) + log2_nsets;
ILOG("%08x LineSize: %u, ways: %u, sets: %u (width: %u)\n",
ccsidr, 4 << (ccsidr & 7), desc->nways, desc->nsets, desc->width);
}
static void init_cache (stlink_t *sl) {
unsigned int clidr;
unsigned int ccr;
unsigned int ctr;
int i;
// assume only F7 has a cache
if (sl->core_id != STM32F7_CORE_ID) { return; }
stlink_read_debug32(sl, CLIDR, &clidr);
stlink_read_debug32(sl, CCR, &ccr);
stlink_read_debug32(sl, CTR, &ctr);
cache_desc.dminline = 4 << ((ctr >> 16) & 0x0f);
cache_desc.iminline = 4 << (ctr & 0x0f);
cache_desc.louu = (clidr >> 27) & 7;
ILOG("Chip clidr: %08x, I-Cache: %s, D-Cache: %s\n",
clidr, ccr & CCR_IC ? "on" : "off", ccr & CCR_DC ? "on" : "off");
ILOG(" cache: LoUU: %u, LoC: %u, LoUIS: %u\n",
(clidr >> 27) & 7, (clidr >> 24) & 7, (clidr >> 21) & 7);
ILOG(" cache: ctr: %08x, DminLine: %u bytes, IminLine: %u bytes\n", ctr,
cache_desc.dminline, cache_desc.iminline);
for (i = 0; i < 7; i++) {
unsigned int ct = (clidr >> (3 * i)) & 0x07;
cache_desc.dcache[i].width = 0;
cache_desc.icache[i].width = 0;
if (ct == 2 || ct == 3 || ct == 4) { // data
stlink_write_debug32(sl, CSSELR, i << 1);
ILOG("D-Cache L%d: ", i);
read_cache_level_desc(sl, &cache_desc.dcache[i]);
}
if (ct == 1 || ct == 3) { // instruction
stlink_write_debug32(sl, CSSELR, (i << 1) | 1);
ILOG("I-Cache L%d: ", i);
read_cache_level_desc(sl, &cache_desc.icache[i]);
}
}
}
static void cache_flush(stlink_t *sl, unsigned ccr) {
int level;
if (ccr & CCR_DC) {
for (level = cache_desc.louu - 1; level >= 0; level--) {
struct cache_level_desc *desc = &cache_desc.dcache[level];
unsigned addr;
unsigned max_addr = 1 << desc->width;
unsigned way_sh = 32 - desc->log2_nways;
// D-cache clean by set-ways.
for (addr = (level << 1); addr < max_addr; addr += cache_desc.dminline) {
unsigned int way;
for (way = 0; way < desc->nways; way++) {