X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gdbserver%2Fgdb-server.c;h=f0e96537486e50748d55e41d6dd2a174afafa5f7;hb=067430469a94cb3266585db88b8fb7e8f97c8857;hp=1254232463d5863c51cbf8e378fd54e0eecab5f1;hpb=c85c172c6313fbc646b1ad96189a0f03121a2370;p=fw%2Fstlink diff --git a/gdbserver/gdb-server.c b/gdbserver/gdb-server.c index 1254232..f0e9653 100644 --- a/gdbserver/gdb-server.c +++ b/gdbserver/gdb-server.c @@ -1,279 +1,356 @@ -/* -*- tab-width:8 -*- */ - /* - Copyright (C) 2011 Peter Zotov - Use of this source code is governed by a BSD-style - license that can be found in the LICENSE file. -*/ + * Copyright (C) 2011 Peter Zotov + * Use of this source code is governed by a BSD-style + * license that can be found in the LICENSE file. + */ +#include +#include #include #include #include +#include #include #include +#ifdef __MINGW32__ +#include "mingw.h" +#else #include #include #include -#include +#endif #include +#include #include "gdb-remote.h" +#include "gdb-server.h" #define FLASH_BASE 0x08000000 + +//Allways update the FLASH_PAGE before each use, by calling stlink_calculate_pagesize #define FLASH_PAGE (sl->flash_pgsz) -#define FLASH_PAGE_MASK (~((1 << 10) - 1)) -#define FLASH_SIZE (FLASH_PAGE * 128) -volatile int do_exit = 0; -void ctrl_c(int sig) -{ - do_exit = 1; -} +stlink_t *connected_stlink = NULL; static const char hex[] = "0123456789abcdef"; static const char* current_memory_map = NULL; -/* - * Chip IDs are explained in the appropriate programming manual for the - * DBGMCU_IDCODE register (0xE0042000) - */ - -#define CORE_M3_R1 0x1BA00477 -#define CORE_M3_R2 0x4BA00477 -#define CORE_M4_R0 0x2BA01477 - -struct chip_params { - uint32_t chip_id; - char* description; - uint32_t flash_size_reg; - uint32_t max_flash_size, flash_pagesize; - uint32_t sram_size; - uint32_t bootrom_base, bootrom_size; -} const devices[] = { - { 0x410, "F1 Medium-density device", 0x1ffff7e0, - 0x20000, 0x400, 0x5000, 0x1ffff000, 0x800 }, // table 2, pm0063 - { 0x411, "F2 device", 0, /* No flash size register found in the docs*/ - 0x100000, 0x20000, 0x20000, 0x1fff0000, 0x7800 }, // table 1, pm0059 - { 0x412, "F1 Low-density device", 0x1ffff7e0, - 0x8000, 0x400, 0x2800, 0x1ffff000, 0x800 }, // table 1, pm0063 - { 0x413, "F4 device", 0x1FFF7A10, - 0x100000, 0x20000, 0x30000, 0x1fff0000, 0x7800 }, // table 1, pm0081 - { 0x414, "F1 High-density device", 0x1ffff7e0, - 0x80000, 0x800, 0x10000, 0x1ffff000, 0x800 }, // table 3 pm0063 - // This ignores the EEPROM! (and uses the page erase size, - // not the sector write protection...) - { 0x416, "L1 Med-density device", 0x1FF8004C, // table 1, pm0062 - 0x20000, 0x100, 0x4000, 0x1ff00000, 0x1000 }, - { 0x418, "F1 Connectivity line device", 0x1ffff7e0, - 0x40000, 0x800, 0x10000, 0x1fffb000, 0x4800 }, - { 0x420, "F1 Medium-density value line device", 0x1ffff7e0, - 0x20000, 0x400, 0x2000, 0x1ffff000, 0x800 }, - { 0x428, "F1 High-density value line device", 0x1ffff7e0, - 0x80000, 0x800, 0x8000, 0x1ffff000, 0x800 }, - { 0x430, "F1 XL-density device", 0x1ffff7e0, // pm0068 - 0x100000, 0x800, 0x18000, 0x1fffe000, 0x1800 }, - { 0 } -}; +typedef struct _st_state_t { + // things from command line, bleh + int stlink_version; + int logging_level; + int listen_port; + int persistent; + int reset; +} st_state_t; -int serve(stlink_t *sl, int port); -char* make_memory_map(const struct chip_params *params, uint32_t flash_size); -int main(int argc, char** argv) { +int serve(stlink_t *sl, st_state_t *st); +char* make_memory_map(stlink_t *sl); - stlink_t *sl = NULL; - int port = 0; - - const char * HelpStr = "\nUsage:\n" - "\tst-util [Arguments]\n" - "\tArguments (no more than 2):\n" - "\t\t: Port. Default: 4242.\n" - "\t\t{usb|sgauto|/dev/sgX}: Transport, " - "where X = {0, 1, 2, ...}. Default: USB.\n" - "\tExamples:\n" - "\t\tst-util 1234\n" - "\t\tst-util sgauto\n" - "\t\tst-util 1234 usb\n" - "\t\tst-util /dev/sgX 1234\n" - "\t\tst-util 1234 /dev/sgX\n"; - - - // Parsing the arguments of command line ... - - if (argc == 1 || argc > 3) { - fprintf(stderr, HelpStr, NULL); - return 1; - } - - for(int a = 1; a < argc; a++) { - - // Port - int p = atoi(argv[a]); - if (p < 0 || p > 0xFFFF) { - fprintf(stderr, "Invalid port\n"); - fprintf(stderr, HelpStr, NULL); - return 1; - } - if (p > 0 && port == 0) {port = p; continue;} - - // if (p == 0) ... - - // usb - if (!strcmp(argv[a], "usb")) { - if (sl != NULL) return 1; - sl = stlink_open_usb(10); - if(sl == NULL) return 1; - continue; - } +static void cleanup(int signal __attribute__((unused))) { + 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); + } - // /dev/sgX - if (!strncmp(argv[a], "/dev/sgX", 7)) { - if(!CONFIG_USE_LIBSG) { - fprintf(stderr, "libsg not use\n"); - return 1; - } - if (sl != NULL) return 1; - sl = stlink_quirk_open(argv[a], 0); - if(sl == NULL) return 1; - continue; - } + exit(1); +} - // sg_auto - if (!strcmp(argv[a], "sgauto")) { - if(!CONFIG_USE_LIBSG) { - fprintf(stderr, "libsg not use\n"); - return 1; - } - // Search ST-LINK (from /dev/sg0 to /dev/sg99) - for(int DevNum = 0; DevNum <= 99; DevNum++) - { - if(sl != NULL) return 1; - if(DevNum < 10) { - char DevName[] = "/dev/sgX"; - DevName[7] = DevNum + '0'; - if ( !access(DevName, F_OK) ) - sl = stlink_quirk_open(DevName, 0); - } - else { - char DevName[] = "/dev/sgXY"; - DevName[7] = DevNum/10 + '0'; - DevName[8] = DevNum%10 + '0'; - if ( !access(DevName, F_OK) ) - sl = stlink_quirk_open(DevName, 0); - } +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'}, + {"stlink_version", required_argument, NULL, 's'}, + {"stlinkv1", no_argument, NULL, '1'}, + {"listen_port", required_argument, NULL, 'p'}, + {"multi", optional_argument, NULL, 'm'}, + {"no-reset", optional_argument, NULL, 'n'}, + {0, 0, 0, 0}, + }; + const char * help_str = "%s - usage:\n\n" + " -h, --help\t\tPrint this help\n" + " -vXX, --verbose=XX\tSpecify a specific verbosity level (0..99)\n" + " -v, --verbose\t\tSpecify generally verbose logging\n" + " -s X, --stlink_version=X\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" + "\n" + "The STLINKv2 device to use can be specified in the environment\n" + "variable STLINK_DEVICE on the format :.\n" + "\n" + ; + + + int option_index = 0; + int c; + int q; + while ((c = getopt_long(argc, argv, "hv::s:1p:mn", long_options, &option_index)) != -1) { + switch (c) { + case 0: + printf("XXXXX Shouldn't really normally come here, only if there's no corresponding option\n"); + printf("option %s", long_options[option_index].name); + if (optarg) { + printf(" with arg %s", optarg); } - - if(sl == NULL) return 1; - continue; - } - - // Invalid argumets - fprintf(stderr, "Invalid argumets\n"); - fprintf(stderr, HelpStr, NULL); - return 1; + printf("\n"); + 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 = DEFAULT_LOGGING_LEVEL; + } + break; + case '1': + st->stlink_version = 1; + break; + case 's': + sscanf(optarg, "%i", &q); + if (q < 0 || q > 2) { + fprintf(stderr, "stlink version %d unknown!\n", q); + exit(EXIT_FAILURE); + } + st->stlink_version = q; + 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; } - - // Default transport: USB - if (sl == NULL) sl = stlink_open_usb(10); - // Default port: 4242 - if (port == 0) port = 4242; - - - if (sl == NULL) return 1; - - if (stlink_current_mode(sl) == STLINK_DEV_DFU_MODE) { - stlink_exit_dfu_mode(sl); - } - - if(stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE) { - stlink_enter_swd_mode(sl); - } - - uint32_t chip_id = stlink_chip_id(sl); - uint32_t core_id = stlink_core_id(sl); - - /* Fix chip_id for F4 */ - if (((chip_id & 0xFFF) == 0x411) && (core_id == CORE_M4_R0)) { - printf("Fixing wrong chip_id for STM32F4 Rev A errata\n"); - chip_id = 0x413; - } - - printf("Chip ID is %08x, Core ID is %08x.\n", chip_id, core_id); - - const struct chip_params* params = NULL; - - for(int i = 0; i < sizeof(devices) / sizeof(devices[0]); i++) { - if(devices[i].chip_id == (chip_id & 0xFFF)) { - params = &devices[i]; - break; - } - } - - if(params == NULL) { - fprintf(stderr, "Cannot recognize the connected device!\n"); - return 0; - } - - printf("Device connected: %s\n", params->description); - printf("Device parameters: SRAM: 0x%x bytes, Flash: up to 0x%x bytes in pages of 0x%x bytes\n", - params->sram_size, params->max_flash_size, params->flash_pagesize); - - FLASH_PAGE = params->flash_pagesize; - - uint32_t flash_size; - - stlink_read_mem32(sl, params->flash_size_reg, 4); - flash_size = sl->q_buf[0] | (sl->q_buf[1] << 8); - - printf("Flash size is %d KiB.\n", flash_size); - // memory map is in 1k blocks. - current_memory_map = make_memory_map(params, flash_size * 0x400); - - while(serve(sl, port) == 0); + } + + if (optind < argc) { + printf("non-option ARGV-elements: "); + while (optind < argc) + printf("%s ", argv[optind++]); + printf("\n"); + } + return 0; +} - /* Switch back to mass storage mode before closing. */ - stlink_run(sl); - stlink_exit_debug_mode(sl); - stlink_close(sl); - return 0; +int main(int argc, char** argv) { + int32_t voltage; + + stlink_t *sl = NULL; + + st_state_t state; + memset(&state, 0, sizeof(state)); + // set defaults... + state.stlink_version = 2; + 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); + switch (state.stlink_version) { + case 2: + sl = stlink_open_usb(state.logging_level, 0); + if(sl == NULL) return 1; + break; + case 1: + sl = stlink_v1_open(state.logging_level, 0); + if(sl == NULL) return 1; + break; + } + + connected_stlink = sl; + signal(SIGINT, &cleanup); + signal(SIGTERM, &cleanup); + + if (state.reset) { + stlink_reset(sl); + } + + ILOG("Chip ID is %08x, Core ID is %08x.\n", sl->chip_id, sl->core_id); + + voltage = stlink_target_voltage(sl); + if (voltage != -1) { + ILOG("Target voltage is %d mV.\n", voltage); + } + + sl->verbose=0; + + current_memory_map = make_memory_map(sl); + +#ifdef __MINGW32__ + WSADATA wsadata; + if (WSAStartup(MAKEWORD(2,2),&wsadata) !=0 ) { + goto winsock_error; + } +#endif + + do { + serve(sl, &state); + + /* Continue */ + stlink_run(sl); + } while (state.persistent); + +#ifdef __MINGW32__ +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 = + "" + "" + "" + " arm" + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + " " + ""; + +static const char* const memory_map_template_F4 = + "" + "" + "" + " " // code = sram, bootrom or flash; flash is bigger + " " // ccm ram + " " // sram + " " //Sectors 0..3 + " 0x4000" //16kB + " " + " " //Sector 4 + " 0x10000" //64kB + " " + " " //Sectors 5..11 + " 0x20000" //128kB + " " + " " // peripheral regs + " " // AHB3 Peripherals + " " // cortex regs + " " // bootrom + " " // option byte area + ""; + static const char* const memory_map_template = - "" - "" - "" - " " // code = sram, bootrom or flash; flash is bigger - " " // sram 8k - " " - " 0x%x" - " " - " " // peripheral regs - " " // cortex regs - " " // bootrom - " " // option byte area - ""; - -char* make_memory_map(const struct chip_params *params, uint32_t flash_size) { - /* This will be freed in serve() */ - char* map = malloc(4096); - map[0] = '\0'; - - snprintf(map, 4096, memory_map_template, - flash_size, - params->sram_size, - flash_size, params->flash_pagesize, - params->bootrom_base, params->bootrom_size); - - return map; + "" + "" + "" + " " // code = sram, bootrom or flash; flash is bigger + " " // sram 8k + " " + " 0x%zx" + " " + " " // peripheral regs + " " // cortex regs + " " // bootrom + " " // option byte area + ""; + +char* make_memory_map(stlink_t *sl) { + /* This will be freed in serve() */ + char* map = malloc(4096); + map[0] = '\0'; + + if(sl->chip_id==STM32_CHIPID_F4 || sl->chip_id==STM32_CHIPID_F4_HD) { + strcpy(map, memory_map_template_F4); + } else { + snprintf(map, 4096, memory_map_template, + sl->flash_size, + sl->sram_size, + sl->flash_size, sl->flash_pgsz, + sl->sys_base, sl->sys_size); + } + return map; } -/* +/* * DWT_COMP0 0xE0001020 * DWT_MASK0 0xE0001024 * DWT_FUNCTION0 0xE0001028 @@ -293,792 +370,875 @@ char* make_memory_map(const struct chip_params *params, uint32_t flash_size) { enum watchfun { WATCHDISABLED = 0, WATCHREAD = 5, WATCHWRITE = 6, WATCHACCESS = 7 }; struct code_hw_watchpoint { - stm32_addr_t addr; - uint8_t mask; - enum watchfun fun; + stm32_addr_t addr; + uint8_t mask; + enum watchfun fun; }; struct code_hw_watchpoint data_watches[DATA_WATCH_NUM]; static void init_data_watchpoints(stlink_t *sl) { - #ifdef DEBUG - printf("init watchpoints\n"); - #endif - - // set trcena in debug command to turn on dwt unit - stlink_read_mem32(sl, 0xE000EDFC, 4); - sl->q_buf[3] |= 1; - stlink_write_mem32(sl, 0xE000EDFC, 4); - - // make sure all watchpoints are cleared - memset(sl->q_buf, 0, 4); - for(int i = 0; i < DATA_WATCH_NUM; i++) { - data_watches[i].fun = WATCHDISABLED; - stlink_write_mem32(sl, 0xe0001028 + i * 16, 4); - } + DLOG("init watchpoints\n"); + + // set trcena in debug command to turn on dwt unit + stlink_write_debug32(sl, 0xE000EDFC, + stlink_read_debug32(sl, 0xE000EDFC) | (1<<24)); + + // 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; - - // computer mask - // find a free watchpoint - // configure - - mask = -1; - i = len; - while(i) { - i >>= 1; - mask++; - } - - if((mask != -1) && (mask < 16)) { - for(i = 0; i < DATA_WATCH_NUM; i++) { - // is this an empty slot ? - if(data_watches[i].fun == WATCHDISABLED) { - #ifdef DEBUG - printf("insert watchpoint %d addr %x wf %u mask %u len %d\n", i, addr, wf, mask, len); - #endif - - data_watches[i].fun = wf; - data_watches[i].addr = addr; - data_watches[i].mask = mask; - - // insert comparator address - sl->q_buf[0] = (addr & 0xff); - sl->q_buf[1] = ((addr >> 8) & 0xff); - sl->q_buf[2] = ((addr >> 16) & 0xff); - sl->q_buf[3] = ((addr >> 24) & 0xff); - - stlink_write_mem32(sl, 0xE0001020 + i * 16, 4); - - // insert mask - memset(sl->q_buf, 0, 4); - sl->q_buf[0] = mask; - stlink_write_mem32(sl, 0xE0001024 + i * 16, 4); - - // insert function - memset(sl->q_buf, 0, 4); - sl->q_buf[0] = wf; - stlink_write_mem32(sl, 0xE0001028 + i * 16, 4); - - // just to make sure the matched bit is clear ! - stlink_read_mem32(sl, 0xE0001028 + i * 16, 4); - return 0; - } - } - } - - #ifdef DEBUG - printf("failure: add watchpoints addr %x wf %u len %u\n", addr, wf, len); - #endif - return -1; +static int add_data_watchpoint(stlink_t *sl, enum watchfun wf, + stm32_addr_t addr, unsigned int len) { + int i = 0; + uint32_t mask; + + // 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); + 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; + int i; - for(i = 0 ; i < DATA_WATCH_NUM; i++) { - if((data_watches[i].addr == addr) && (data_watches[i].fun != WATCHDISABLED)) { - #ifdef DEBUG - printf("delete watchpoint %d addr %x\n", i, addr); - #endif + 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); - memset(sl->q_buf, 0, 4); - data_watches[i].fun = WATCHDISABLED; - stlink_write_mem32(sl, 0xe0001028 + i * 16, 4); + data_watches[i].fun = WATCHDISABLED; + stlink_write_debug32(sl, 0xe0001028 + i * 16, 0); - return 0; - } - } + return 0; + } + } - #ifdef DEBUG - printf("failure: delete watchpoint addr %x\n", addr); - #endif + DLOG("failure: delete watchpoint addr %x\n", addr); - return -1; + return -1; } #define CODE_BREAK_NUM 6 +#define CODE_LIT_NUM 2 #define CODE_BREAK_LOW 0x01 #define CODE_BREAK_HIGH 0x02 struct code_hw_breakpoint { - stm32_addr_t addr; - int type; + stm32_addr_t addr; + int type; }; struct code_hw_breakpoint code_breaks[CODE_BREAK_NUM]; static void init_code_breakpoints(stlink_t *sl) { - memset(sl->q_buf, 0, 4); - sl->q_buf[0] = 0x03; // KEY | ENABLE - stlink_write_mem32(sl, CM3_REG_FP_CTRL, 4); - printf("KARL - should read back as 0x03, not 60 02 00 00\n"); - stlink_read_mem32(sl, CM3_REG_FP_CTRL, 4); - - memset(sl->q_buf, 0, 4); - for(int i = 0; i < CODE_BREAK_NUM; i++) { - code_breaks[i].type = 0; - stlink_write_mem32(sl, CM3_REG_FP_COMP0 + i * 4, 4); - } + memset(sl->q_buf, 0, 4); + stlink_write_debug32(sl, CM3_REG_FP_CTRL, 0x03 /*KEY | ENABLE4*/); + unsigned int val = stlink_read_debug32(sl, CM3_REG_FP_CTRL); + if (((val & 3) != 1) || + ((((val >> 8) & 0x70) | ((val >> 4) & 0xf)) != CODE_BREAK_NUM) || + (((val >> 8) & 0xf) != CODE_LIT_NUM)){ + ELOG("[FP_CTRL] = 0x%08x expecting 0x%08x\n", val, + ((CODE_BREAK_NUM & 0x70) << 8) | (CODE_LIT_NUM << 8) | ((CODE_BREAK_NUM & 0xf) << 4) | 1); + } + + + for(int i = 0; i < CODE_BREAK_NUM; i++) { + code_breaks[i].type = 0; + stlink_write_debug32(sl, CM3_REG_FP_COMP0 + i * 4, 0); + } } static int update_code_breakpoint(stlink_t *sl, stm32_addr_t addr, int set) { - stm32_addr_t fpb_addr = addr & ~0x3; - int type = addr & 0x2 ? CODE_BREAK_HIGH : CODE_BREAK_LOW; - - if(addr & 1) { - fprintf(stderr, "update_code_breakpoint: unaligned address %08x\n", addr); - return -1; - } - - 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* brk = &code_breaks[id]; - - brk->addr = fpb_addr; - - if(set) brk->type |= type; - else brk->type &= ~type; - - memset(sl->q_buf, 0, 4); - - if(brk->type == 0) { - #ifdef DEBUG - printf("clearing hw break %d\n", id); - #endif - - stlink_write_mem32(sl, 0xe0002008 + id * 4, 4); - } else { - sl->q_buf[0] = ( brk->addr & 0xff) | 1; - sl->q_buf[1] = ((brk->addr >> 8) & 0xff); - sl->q_buf[2] = ((brk->addr >> 16) & 0xff); - sl->q_buf[3] = ((brk->addr >> 24) & 0xff) | (brk->type << 6); - - #ifdef DEBUG - printf("setting hw break %d at %08x (%d)\n", - id, brk->addr, brk->type); - printf("reg %02x %02x %02x %02x\n", - sl->q_buf[3], sl->q_buf[2], sl->q_buf[1], sl->q_buf[0]); - #endif - - stlink_write_mem32(sl, 0xe0002008 + id * 4, 4); - } - - return 0; + stm32_addr_t fpb_addr = addr & ~0x3; + int type = addr & 0x2 ? CODE_BREAK_HIGH : CODE_BREAK_LOW; + + if(addr & 1) { + ELOG("update_code_breakpoint: unaligned address %08x\n", addr); + return -1; + } + + 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* brk = &code_breaks[id]; + + brk->addr = fpb_addr; + + if(set) brk->type |= type; + else brk->type &= ~type; + + if(brk->type == 0) { + DLOG("clearing hw break %d\n", id); + + stlink_write_debug32(sl, 0xe0002008 + id * 4, 0); + } else { + uint32_t mask = (brk->addr) | 1 | (brk->type << 30); + + DLOG("setting hw break %d at %08x (%d)\n", + id, brk->addr, brk->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; + stm32_addr_t addr; + unsigned length; + uint8_t* data; - struct flash_block* next; + 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 + FLASH_SIZE) { - fprintf(stderr, "flash_add_block: incorrect bounds\n"); - return -1; - } +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; + } - if(addr % FLASH_PAGE != 0 || length % FLASH_PAGE != 0) { - fprintf(stderr, "flash_add_block: unaligned block\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; + struct flash_block* new = malloc(sizeof(struct flash_block)); + new->next = flash_root; - new->addr = addr; - new->length = length; - new->data = calloc(length, 1); + new->addr = addr; + new->length = length; + new->data = calloc(length, 1); - flash_root = new; + flash_root = new; - return 0; + return 0; } static int flash_populate(stm32_addr_t addr, uint8_t* data, unsigned length) { - 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) { - fprintf(stderr, "Unfit data block %08x -> %04x\n", addr, length); - return -1; - } - - if(fit_length != length) { - fprintf(stderr, "warning: data block %08x -> %04x truncated to %04x\n", - addr, length, fit_length); - fprintf(stderr, "(this is not an error, just a GDB glitch)\n"); - } - - return 0; + 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; + int error = -1; - // Some kinds of clock settings do not allow writing to flash. - stlink_reset(sl); + // Some kinds of clock settings do not allow writing to flash. + stlink_reset(sl); - for(struct flash_block* fb = flash_root; fb; fb = fb->next) { - #ifdef DEBUG - printf("flash_do: block %08x -> %04x\n", fb->addr, fb->length); - #endif + for(struct flash_block* fb = flash_root; fb; fb = fb->next) { + DLOG("flash_do: block %08x -> %04x\n", fb->addr, fb->length); - unsigned length = fb->length; - for(stm32_addr_t page = fb->addr; page < fb->addr + fb->length; page += FLASH_PAGE) { - #ifdef DEBUG - printf("flash_do: page %08x\n", page); - #endif + unsigned length = fb->length; + for(stm32_addr_t page = fb->addr; page < fb->addr + fb->length; page += FLASH_PAGE) { - stlink_erase_flash_page(sl, page); + //Update FLASH_PAGE + stlink_calculate_pagesize(sl, page); - if(stlink_write_flash(sl, page, fb->data + (page - fb->addr), - length > FLASH_PAGE ? FLASH_PAGE : length) < 0) - goto error; - } + DLOG("flash_do: page %08x\n", page); - } + if(stlink_write_flash(sl, page, fb->data + (page - fb->addr), + length > FLASH_PAGE ? FLASH_PAGE : length) < 0) + goto error; + } + } - stlink_reset(sl); + stlink_reset(sl); - error = 0; + error = 0; error: - for(struct flash_block* fb = flash_root, *next; fb; fb = next) { - next = fb->next; - free(fb->data); - free(fb); - } + for(struct flash_block* fb = flash_root, *next; fb; fb = next) { + next = fb->next; + free(fb->data); + free(fb); + } - flash_root = NULL; + flash_root = NULL; - return error; + return error; } -int serve(stlink_t *sl, int port) { - int sock = socket(AF_INET, SOCK_STREAM, 0); - if(sock < 0) { - perror("socket"); - return 1; - } - - unsigned int val = 1; - setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); - - struct sockaddr_in serv_addr = {0}; - serv_addr.sin_family = AF_INET; - serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); - serv_addr.sin_port = htons(port); - - if(bind(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) { - perror("bind"); - return 1; - } - - if(listen(sock, 5) < 0) { - perror("listen"); - return 1; - } - - stlink_force_debug(sl); - stlink_reset(sl); - init_code_breakpoints(sl); - init_data_watchpoints(sl); - - printf("Listening at *:%d...\n", port); - - (void) signal (SIGINT, ctrl_c); - int client = accept(sock, NULL, NULL); - signal (SIGINT, SIG_DFL); - if(client < 0) { - perror("accept"); - return 1; - } - - close(sock); - - printf("GDB connected.\n"); - - /* - * To allow resetting the chip from GDB it is required to - * emulate attaching and detaching to target. - */ - unsigned int attached = 1; - - while(1) { - char* packet; - - int status = gdb_recv_packet(client, &packet); - if(status < 0) { - fprintf(stderr, "cannot recv: %d\n", status); - return 1; - } - - #ifdef DEBUG - printf("recv: %s\n", packet); - #endif - - char* reply = NULL; - reg regp; - - switch(packet[0]) { - case 'q': { - if(packet[1] == 'P' || packet[1] == 'C' || packet[1] == 'L') { - reply = strdup(""); - break; - } - - char *separator = strstr(packet, ":"), *params = ""; - if(separator == NULL) { - separator = packet + strlen(packet); - } else { - params = separator + 1; - } - - unsigned queryNameLength = (separator - &packet[1]); - char* queryName = calloc(queryNameLength + 1, 1); - strncpy(queryName, &packet[1], queryNameLength); - - #ifdef DEBUG - printf("query: %s;%s\n", queryName, params); - #endif - - if(!strcmp(queryName, "Supported")) { - reply = strdup("PacketSize=3fff;qXfer:memory-map:read+"); - } else if(!strcmp(queryName, "Xfer")) { - char *type, *op, *s_addr, *s_length; - char *tok = params; - char *annex __attribute__((unused)); - - type = strsep(&tok, ":"); - op = strsep(&tok, ":"); - annex = strsep(&tok, ":"); - s_addr = strsep(&tok, ","); - s_length = tok; - - unsigned addr = strtoul(s_addr, NULL, 16), - length = strtoul(s_length, NULL, 16); - - #ifdef DEBUG - printf("Xfer: type:%s;op:%s;annex:%s;addr:%d;length:%d\n", - type, op, annex, addr, length); - #endif - - const char* data = NULL; - - if(!strcmp(type, "memory-map") && !strcmp(op, "read")) - data = current_memory_map; - - if(data) { - unsigned data_length = strlen(data); - if(addr + length > data_length) - length = data_length - addr; - - if(length == 0) { - reply = strdup("l"); - } else { - reply = calloc(length + 2, 1); - reply[0] = 'm'; - strncpy(&reply[1], data, length); - } - } - } - - if(reply == NULL) - reply = strdup(""); - - free(queryName); - - break; - } - - case 'v': { - char *params = NULL; - char *cmdName = strtok_r(packet, ":;", ¶ms); - - cmdName++; // vCommand -> Command - - if(!strcmp(cmdName, "FlashErase")) { - char *s_addr, *s_length; - char *tok = params; - - s_addr = strsep(&tok, ","); - s_length = tok; - - unsigned addr = strtoul(s_addr, NULL, 16), - length = strtoul(s_length, NULL, 16); - - #ifdef DEBUG - printf("FlashErase: addr:%08x,len:%04x\n", - addr, length); - #endif - - if(flash_add_block(addr, length, sl) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - } - } else if(!strcmp(cmdName, "FlashWrite")) { - char *s_addr, *data; - char *tok = params; - - s_addr = strsep(&tok, ":"); - data = tok; - - unsigned addr = strtoul(s_addr, NULL, 16); - unsigned data_length = status - (data - packet); - - // Length of decoded data cannot be more than - // encoded, as escapes are removed. - // Additional byte is reserved for alignment fix. - uint8_t *decoded = calloc(data_length + 1, 1); - unsigned dec_index = 0; - for(int i = 0; i < data_length; i++) { - if(data[i] == 0x7d) { - i++; - decoded[dec_index++] = data[i] ^ 0x20; - } else { - decoded[dec_index++] = data[i]; - } - } - - // Fix alignment - if(dec_index % 2 != 0) - dec_index++; - - #ifdef DEBUG - printf("binary packet %d -> %d\n", data_length, dec_index); - #endif - - if(flash_populate(addr, decoded, dec_index) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - } - } else if(!strcmp(cmdName, "FlashDone")) { - if(flash_go(sl) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - } - } else if(!strcmp(cmdName, "Kill")) { - attached = 0; - - reply = strdup("OK"); - } - - if(reply == NULL) - reply = strdup(""); - - break; - } - - case 'c': - stlink_run(sl); - - while(1) { - int status = gdb_check_for_interrupt(client); - if(status < 0) { - fprintf(stderr, "cannot check for int: %d\n", status); - return 1; - } - - if(status == 1) { - stlink_force_debug(sl); - break; - } - - stlink_status(sl); - if(sl->core_stat == STLINK_CORE_HALTED) { - break; - } - - usleep(100000); - } - - reply = strdup("S05"); // TRAP - break; - - case 's': - stlink_step(sl); - - reply = strdup("S05"); // TRAP - break; - - case '?': - if(attached) { - reply = strdup("S05"); // TRAP - } else { - /* Stub shall reply OK if not attached. */ - reply = strdup("OK"); - } - break; - - case 'g': - stlink_read_all_regs(sl, ®p); - - reply = calloc(8 * 16 + 1, 1); - for(int i = 0; i < 16; i++) - sprintf(&reply[i * 8], "%08x", htonl(regp.r[i])); - - break; - - case 'p': { - unsigned id = strtoul(&packet[1], NULL, 16); - unsigned myreg = 0xDEADDEAD; - - if(id < 16) { - stlink_read_reg(sl, id, ®p); - myreg = htonl(regp.r[id]); - } else if(id == 0x19) { - stlink_read_reg(sl, 16, ®p); - myreg = htonl(regp.xpsr); - } else { - reply = strdup("E00"); - } - - reply = calloc(8 + 1, 1); - sprintf(reply, "%08x", myreg); - - break; - } - - case 'P': { - char* s_reg = &packet[1]; - char* s_value = strstr(&packet[1], "=") + 1; - - unsigned reg = strtoul(s_reg, NULL, 16); - unsigned value = strtoul(s_value, NULL, 16); - - if(reg < 16) { - stlink_write_reg(sl, ntohl(value), reg); - } else if(reg == 0x19) { - stlink_write_reg(sl, ntohl(value), 16); - } else { - reply = strdup("E00"); - } - - if(!reply) { - reply = strdup("OK"); - } - - break; - } - - case 'G': - for(int i = 0; i < 16; i++) { - char str[9] = {0}; - strncpy(str, &packet[1 + i * 8], 8); - uint32_t reg = strtoul(str, NULL, 16); - stlink_write_reg(sl, ntohl(reg), i); - } - - reply = strdup("OK"); - break; - - case 'm': { - char* s_start = &packet[1]; - char* s_count = strstr(&packet[1], ",") + 1; - - stm32_addr_t start = strtoul(s_start, NULL, 16); - unsigned count = strtoul(s_count, NULL, 16); - - unsigned adj_start = start % 4; - - stlink_read_mem32(sl, start - adj_start, (count % 4 == 0) ? - count : count + 4 - (count % 4)); - - reply = calloc(count * 2 + 1, 1); - for(int i = 0; i < count; i++) { - reply[i * 2 + 0] = hex[sl->q_buf[i + adj_start] >> 4]; - reply[i * 2 + 1] = hex[sl->q_buf[i + adj_start] & 0xf]; - } - - break; - } - - case 'M': { - char* s_start = &packet[1]; - char* s_count = strstr(&packet[1], ",") + 1; - char* hexdata = strstr(packet, ":") + 1; - - stm32_addr_t start = strtoul(s_start, NULL, 16); - unsigned count = strtoul(s_count, NULL, 16); - - for(int i = 0; i < count; i ++) { - char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 }; - uint8_t byte = strtoul(hex, NULL, 16); - sl->q_buf[i] = byte; - } - - if((count % 4) == 0 && (start % 4) == 0) { - stlink_write_mem32(sl, start, count); - } else { - stlink_write_mem8(sl, start, count); - } - - reply = strdup("OK"); - - break; - } - - case 'Z': { - char *endptr; - stm32_addr_t addr = strtoul(&packet[3], &endptr, 16); - stm32_addr_t len = strtoul(&endptr[1], NULL, 16); - - switch (packet[1]) { - case '1': - if(update_code_breakpoint(sl, addr, 1) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - } - break; - - case '2': // insert write watchpoint - case '3': // insert read watchpoint - case '4': // insert access watchpoint - { - enum watchfun wf; - if(packet[1] == '2') { - wf = WATCHWRITE; - } else if(packet[1] == '3') { - wf = WATCHREAD; - } else { - wf = WATCHACCESS; - if(add_data_watchpoint(sl, wf, addr, len) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - break; - } - } - } - - default: - reply = strdup(""); - } - break; - } - case 'z': { - char *endptr; - stm32_addr_t addr = strtoul(&packet[3], &endptr, 16); - //stm32_addr_t len = strtoul(&endptr[1], NULL, 16); - - switch (packet[1]) { - case '1': // remove breakpoint - update_code_breakpoint(sl, addr, 0); - reply = strdup("OK"); - break; - - case '2' : // remove write watchpoint - case '3' : // remove read watchpoint - case '4' : // remove access watchpoint - if(delete_data_watchpoint(sl, addr) < 0) { - reply = strdup("E00"); - } else { - reply = strdup("OK"); - break; - } - - default: - reply = strdup(""); - } - break; - } - - case '!': { - /* - * Enter extended mode which allows restarting. - * We do support that always. - */ - - reply = strdup("OK"); - - break; - } - - case 'R': { - /* Reset the core. */ - - stlink_reset(sl); - init_code_breakpoints(sl); - init_data_watchpoints(sl); - - attached = 1; - - reply = strdup("OK"); - - break; - } - - default: - reply = strdup(""); - } - - if(reply) { - #ifdef DEBUG - printf("send: %s\n", reply); - #endif - - int result = gdb_send_packet(client, reply); - if(result != 0) { - fprintf(stderr, "cannot send: %d\n", result); - return 1; - } - - free(reply); - } - - free(packet); - } - - return 0; +int serve(stlink_t *sl, st_state_t *st) { + int sock = socket(AF_INET, SOCK_STREAM, 0); + if(sock < 0) { + perror("socket"); + return 1; + } + + unsigned int val = 1; + setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val)); + + struct sockaddr_in serv_addr; + memset(&serv_addr,0,sizeof(struct sockaddr_in)); + serv_addr.sin_family = AF_INET; + serv_addr.sin_addr.s_addr = INADDR_ANY; + serv_addr.sin_port = htons(st->listen_port); + + if(bind(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) { + perror("bind"); + return 1; + } + + if(listen(sock, 5) < 0) { + perror("listen"); + return 1; + } + + ILOG("Listening at *:%d...\n", st->listen_port); + + int client = accept(sock, NULL, NULL); + //signal (SIGINT, SIG_DFL); + if(client < 0) { + perror("accept"); + return 1; + } + + close(sock); + + stlink_force_debug(sl); + if (st->reset) { + stlink_reset(sl); + } + init_code_breakpoints(sl); + init_data_watchpoints(sl); + + ILOG("GDB connected.\n"); + + /* + * To allow resetting the chip from GDB it is required to + * emulate attaching and detaching to target. + */ + unsigned int attached = 1; + + while(1) { + char* packet; + + int status = gdb_recv_packet(client, &packet); + if(status < 0) { + ELOG("cannot recv: %d\n", status); + return 1; + } + + DLOG("recv: %s\n", packet); + + char* reply = NULL; + reg regp; + + switch(packet[0]) { + case 'q': { + if(packet[1] == 'P' || packet[1] == 'C' || packet[1] == 'L') { + reply = strdup(""); + break; + } + + char *separator = strstr(packet, ":"), *params = ""; + if(separator == NULL) { + separator = packet + strlen(packet); + } else { + params = separator + 1; + } + + unsigned queryNameLength = (separator - &packet[1]); + char* queryName = calloc(queryNameLength + 1, 1); + strncpy(queryName, &packet[1], queryNameLength); + + DLOG("query: %s;%s\n", queryName, params); + + if(!strcmp(queryName, "Supported")) { + if(sl->chip_id==STM32_CHIPID_F4 || sl->chip_id==STM32_CHIPID_F4_HD) { + reply = strdup("PacketSize=3fff;qXfer:memory-map:read+;qXfer:features:read+"); + } + else { + reply = strdup("PacketSize=3fff;qXfer:memory-map:read+"); + } + } else if(!strcmp(queryName, "Xfer")) { + char *type, *op, *__s_addr, *s_length; + char *tok = params; + char *annex __attribute__((unused)); + + type = strsep(&tok, ":"); + op = strsep(&tok, ":"); + annex = strsep(&tok, ":"); + __s_addr = strsep(&tok, ","); + s_length = tok; + + unsigned addr = strtoul(__s_addr, NULL, 16), + length = strtoul(s_length, NULL, 16); + + DLOG("Xfer: type:%s;op:%s;annex:%s;addr:%d;length:%d\n", + type, op, annex, addr, length); + + const char* data = NULL; + + if(!strcmp(type, "memory-map") && !strcmp(op, "read")) + data = current_memory_map; + + if(!strcmp(type, "features") && !strcmp(op, "read")) + data = target_description_F4; + + if(data) { + unsigned data_length = strlen(data); + if(addr + length > data_length) + length = data_length - addr; + + if(length == 0) { + reply = strdup("l"); + } else { + reply = calloc(length + 2, 1); + reply[0] = 'm'; + strncpy(&reply[1], data, length); + } + } + } else if(!strncmp(queryName, "Rcmd,",4)) { + // Rcmd uses the wrong separator + char *separator = strstr(packet, ","), *params = ""; + if(separator == NULL) { + separator = packet + strlen(packet); + } else { + params = separator + 1; + } + + + if (!strncmp(params,"726573756d65",12)) {// resume + DLOG("Rcmd: resume\n"); + stlink_run(sl); + + reply = strdup("OK"); + } else if (!strncmp(params,"68616c74",8)) { //halt + reply = strdup("OK"); + + stlink_force_debug(sl); + + DLOG("Rcmd: halt\n"); + } else if (!strncmp(params,"6a7461675f7265736574",20)) { //jtag_reset + reply = strdup("OK"); + + stlink_jtag_reset(sl, 0); + stlink_jtag_reset(sl, 1); + stlink_force_debug(sl); + + DLOG("Rcmd: jtag_reset\n"); + } else if (!strncmp(params,"7265736574",10)) { //reset + reply = strdup("OK"); + + stlink_force_debug(sl); + stlink_reset(sl); + init_code_breakpoints(sl); + init_data_watchpoints(sl); + + DLOG("Rcmd: reset\n"); + } else { + DLOG("Rcmd: %s\n", params); + } + + } + + if(reply == NULL) + reply = strdup(""); + + free(queryName); + + break; + } + + case 'v': { + char *params = NULL; + char *cmdName = strtok_r(packet, ":;", ¶ms); + + cmdName++; // vCommand -> Command + + if(!strcmp(cmdName, "FlashErase")) { + char *__s_addr, *s_length; + char *tok = params; + + __s_addr = strsep(&tok, ","); + s_length = tok; + + unsigned addr = strtoul(__s_addr, NULL, 16), + length = strtoul(s_length, NULL, 16); + + DLOG("FlashErase: addr:%08x,len:%04x\n", + addr, length); + + if(flash_add_block(addr, length, sl) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + } + } else if(!strcmp(cmdName, "FlashWrite")) { + char *__s_addr, *data; + char *tok = params; + + __s_addr = strsep(&tok, ":"); + data = tok; + + unsigned addr = strtoul(__s_addr, NULL, 16); + unsigned data_length = status - (data - packet); + + // Length of decoded data cannot be more than + // encoded, as escapes are removed. + // Additional byte is reserved for alignment fix. + uint8_t *decoded = calloc(data_length + 1, 1); + unsigned dec_index = 0; + for(unsigned int i = 0; i < data_length; i++) { + if(data[i] == 0x7d) { + i++; + decoded[dec_index++] = data[i] ^ 0x20; + } else { + decoded[dec_index++] = data[i]; + } + } + + // Fix alignment + if(dec_index % 2 != 0) + dec_index++; + + DLOG("binary packet %d -> %d\n", data_length, dec_index); + + if(flash_populate(addr, decoded, dec_index) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + } + } else if(!strcmp(cmdName, "FlashDone")) { + if(flash_go(sl) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + } + } else if(!strcmp(cmdName, "Kill")) { + attached = 0; + + reply = strdup("OK"); + } + + if(reply == NULL) + reply = strdup(""); + + break; + } + + case 'c': + stlink_run(sl); + + while(1) { + int status = gdb_check_for_interrupt(client); + if(status < 0) { + ELOG("cannot check for int: %d\n", status); + return 1; + } + + if(status == 1) { + stlink_force_debug(sl); + break; + } + + stlink_status(sl); + if(sl->core_stat == STLINK_CORE_HALTED) { + break; + } + + usleep(100000); + } + + reply = strdup("S05"); // TRAP + break; + + case 's': + stlink_step(sl); + + reply = strdup("S05"); // TRAP + break; + + case '?': + if(attached) { + reply = strdup("S05"); // TRAP + } else { + /* Stub shall reply OK if not attached. */ + reply = strdup("OK"); + } + break; + + case 'g': + stlink_read_all_regs(sl, ®p); + + reply = calloc(8 * 16 + 1, 1); + for(int i = 0; i < 16; i++) + sprintf(&reply[i * 8], "%08x", htonl(regp.r[i])); + + break; + + case 'p': { + unsigned id = strtoul(&packet[1], NULL, 16); + unsigned myreg = 0xDEADDEAD; + + if(id < 16) { + stlink_read_reg(sl, id, ®p); + myreg = htonl(regp.r[id]); + } else if(id == 0x19) { + stlink_read_reg(sl, 16, ®p); + myreg = htonl(regp.xpsr); + } else if(id == 0x1A) { + stlink_read_reg(sl, 17, ®p); + myreg = htonl(regp.main_sp); + } else if(id == 0x1B) { + stlink_read_reg(sl, 18, ®p); + myreg = htonl(regp.process_sp); + } else if(id == 0x1C) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.control); + } else if(id == 0x1D) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.faultmask); + } else if(id == 0x1E) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.basepri); + } else if(id == 0x1F) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.primask); + } else if(id >= 0x20 && id < 0x40) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.s[id-0x20]); + } else if(id == 0x40) { + stlink_read_unsupported_reg(sl, id, ®p); + myreg = htonl(regp.fpscr); + } else { + reply = strdup("E00"); + } + + reply = calloc(8 + 1, 1); + sprintf(reply, "%08x", myreg); + + break; + } + + case 'P': { + char* s_reg = &packet[1]; + char* s_value = strstr(&packet[1], "=") + 1; + + unsigned reg = strtoul(s_reg, NULL, 16); + unsigned value = strtoul(s_value, NULL, 16); + + if(reg < 16) { + stlink_write_reg(sl, ntohl(value), reg); + } else if(reg == 0x19) { + stlink_write_reg(sl, ntohl(value), 16); + } else if(reg == 0x1A) { + stlink_write_reg(sl, ntohl(value), 17); + } else if(reg == 0x1B) { + stlink_write_reg(sl, ntohl(value), 18); + } else if(reg == 0x1C) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else if(reg == 0x1D) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else if(reg == 0x1E) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else if(reg == 0x1F) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else if(reg >= 0x20 && reg < 0x40) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else if(reg == 0x40) { + stlink_write_unsupported_reg(sl, ntohl(value), reg, ®p); + } else { + reply = strdup("E00"); + } + + if(!reply) { + reply = strdup("OK"); + } + + break; + } + + case 'G': + for(int i = 0; i < 16; i++) { + char str[9] = {0}; + strncpy(str, &packet[1 + i * 8], 8); + uint32_t reg = strtoul(str, NULL, 16); + stlink_write_reg(sl, ntohl(reg), i); + } + + reply = strdup("OK"); + break; + + case 'm': { + char* s_start = &packet[1]; + char* s_count = strstr(&packet[1], ",") + 1; + + stm32_addr_t start = strtoul(s_start, NULL, 16); + unsigned count = strtoul(s_count, NULL, 16); + + unsigned adj_start = start % 4; + unsigned count_rnd = (count + adj_start + 4 - 1) / 4 * 4; + + stlink_read_mem32(sl, start - adj_start, count_rnd); + + reply = calloc(count * 2 + 1, 1); + for(unsigned int i = 0; i < count; i++) { + reply[i * 2 + 0] = hex[sl->q_buf[i + adj_start] >> 4]; + reply[i * 2 + 1] = hex[sl->q_buf[i + adj_start] & 0xf]; + } + + break; + } + + case 'M': { + char* s_start = &packet[1]; + char* s_count = strstr(&packet[1], ",") + 1; + char* hexdata = strstr(packet, ":") + 1; + + stm32_addr_t start = strtoul(s_start, NULL, 16); + unsigned count = strtoul(s_count, NULL, 16); + + if(start % 4) { + unsigned align_count = 4 - start % 4; + if (align_count > count) align_count = count; + for(unsigned int i = 0; i < align_count; i ++) { + char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 }; + uint8_t byte = strtoul(hex, NULL, 16); + sl->q_buf[i] = byte; + } + stlink_write_mem8(sl, start, align_count); + start += align_count; + count -= align_count; + hexdata += 2*align_count; + } + + if(count - count % 4) { + unsigned aligned_count = count - count % 4; + + for(unsigned int i = 0; i < aligned_count; i ++) { + char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 }; + uint8_t byte = strtoul(hex, NULL, 16); + sl->q_buf[i] = byte; + } + stlink_write_mem32(sl, start, aligned_count); + count -= aligned_count; + start += aligned_count; + hexdata += 2*aligned_count; + } + + if(count) { + for(unsigned int i = 0; i < count; i ++) { + char hex[3] = { hexdata[i*2], hexdata[i*2+1], 0 }; + uint8_t byte = strtoul(hex, NULL, 16); + sl->q_buf[i] = byte; + } + stlink_write_mem8(sl, start, count); + } + reply = strdup("OK"); + break; + } + + case 'Z': { + char *endptr; + stm32_addr_t addr = strtoul(&packet[3], &endptr, 16); + stm32_addr_t len = strtoul(&endptr[1], NULL, 16); + + switch (packet[1]) { + case '1': + if(update_code_breakpoint(sl, addr, 1) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + } + break; + + case '2': // insert write watchpoint + case '3': // insert read watchpoint + case '4': { // insert access watchpoint + enum watchfun wf; + if(packet[1] == '2') { + wf = WATCHWRITE; + } else if(packet[1] == '3') { + wf = WATCHREAD; + } else { + wf = WATCHACCESS; + } + + if(add_data_watchpoint(sl, wf, addr, len) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + break; + } + } + + default: + reply = strdup(""); + } + break; + } + case 'z': { + char *endptr; + stm32_addr_t addr = strtoul(&packet[3], &endptr, 16); + //stm32_addr_t len = strtoul(&endptr[1], NULL, 16); + + switch (packet[1]) { + case '1': // remove breakpoint + update_code_breakpoint(sl, addr, 0); + reply = strdup("OK"); + break; + + case '2' : // remove write watchpoint + case '3' : // remove read watchpoint + case '4' : // remove access watchpoint + if(delete_data_watchpoint(sl, addr) < 0) { + reply = strdup("E00"); + } else { + reply = strdup("OK"); + break; + } + + default: + reply = strdup(""); + } + break; + } + + case '!': { + /* + * Enter extended mode which allows restarting. + * We do support that always. + */ + + /* + * Also, set to persistent mode + * to allow GDB disconnect. + */ + st->persistent = 1; + + reply = strdup("OK"); + + break; + } + + case 'R': { + /* Reset the core. */ + + stlink_reset(sl); + init_code_breakpoints(sl); + init_data_watchpoints(sl); + + attached = 1; + + reply = strdup("OK"); + + break; + } + + default: + reply = strdup(""); + } + + if(reply) { + DLOG("send: %s\n", reply); + + int result = gdb_send_packet(client, reply); + if(result != 0) { + ELOG("cannot send: %d\n", result); + free(reply); + free(packet); + return 1; + } + + free(reply); + } + + free(packet); + } + + return 0; }