X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=src%2Ftarget%2Fnds32.c;h=e4bb17f9df278bd736ded0f78c1086476bc01d24;hb=f18ca510b3430a515f28f19ea6c6731a40022fb6;hp=95a249d0535bf553cf4176260cf461c2cf052c48;hpb=d979d78e97786667d168ba183c9fc60c622d29c1;p=openocd.git

diff --git a/src/target/nds32.c b/src/target/nds32.c
index 95a249d053..e4bb17f9df 100644
--- a/src/target/nds32.c
+++ b/src/target/nds32.c
@@ -13,9 +13,7 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #ifdef HAVE_CONFIG_H
@@ -86,32 +84,32 @@ static int nds32_get_core_reg(struct reg *reg)
 	}
 
 	if (reg->valid) {
-		LOG_DEBUG("reading register(cached) %i(%s), value: 0x%8.8" PRIx32,
-				reg_arch_info->num, reg->name, reg_arch_info->value);
+		uint32_t val = buf_get_u32(reg_arch_info->value, 0, 32);
+		LOG_DEBUG("reading register(cached) %" PRIi32 "(%s), value: 0x%8.8" PRIx32,
+				reg_arch_info->num, reg->name, val);
 		return ERROR_OK;
 	}
 
 	int mapped_regnum = nds32->register_map(nds32, reg_arch_info->num);
 
 	if (reg_arch_info->enable == false) {
-		reg_arch_info->value = NDS32_REGISTER_DISABLE;
+		buf_set_u32(reg_arch_info->value, 0, 32, NDS32_REGISTER_DISABLE);
 		retval = ERROR_FAIL;
 	} else {
-		if ((nds32->fpu_enable == false) &&
-			(NDS32_REG_TYPE_FPU == nds32_reg_type(mapped_regnum))) {
-			reg_arch_info->value = 0;
+		uint32_t val = 0;
+		if ((nds32->fpu_enable == false)
+				&& (NDS32_REG_TYPE_FPU == nds32_reg_type(mapped_regnum))) {
 			retval = ERROR_OK;
-		} else if ((nds32->audio_enable == false) &&
-			(NDS32_REG_TYPE_AUMR == nds32_reg_type(mapped_regnum))) {
-			reg_arch_info->value = 0;
+		} else if ((nds32->audio_enable == false)
+				&& (NDS32_REG_TYPE_AUMR == nds32_reg_type(mapped_regnum))) {
 			retval = ERROR_OK;
 		} else {
-			retval = aice_read_register(aice,
-					mapped_regnum, &(reg_arch_info->value));
+			retval = aice_read_register(aice, mapped_regnum, &val);
 		}
+		buf_set_u32(reg_arch_info->value, 0, 32, val);
 
-		LOG_DEBUG("reading register %i(%s), value: 0x%8.8" PRIx32,
-				reg_arch_info->num, reg->name, reg_arch_info->value);
+		LOG_DEBUG("reading register %" PRIi32 "(%s), value: 0x%8.8" PRIx32,
+				reg_arch_info->num, reg->name, val);
 	}
 
 	if (retval == ERROR_OK) {
@@ -139,17 +137,17 @@ static int nds32_get_core_reg_64(struct reg *reg)
 		return ERROR_OK;
 
 	if (reg_arch_info->enable == false) {
-		reg_arch_info->value_64 = NDS32_REGISTER_DISABLE;
+		buf_set_u64(reg_arch_info->value, 0, 64, NDS32_REGISTER_DISABLE);
 		retval = ERROR_FAIL;
 	} else {
-		if ((nds32->fpu_enable == false) &&
-			((FD0 <= reg_arch_info->num) && (reg_arch_info->num <= FD31))) {
-			reg_arch_info->value_64 = 0;
+		uint64_t val = 0;
+		if ((nds32->fpu_enable == false)
+				&& ((FD0 <= reg_arch_info->num) && (reg_arch_info->num <= FD31))) {
 			retval = ERROR_OK;
 		} else {
-			retval = aice_read_reg_64(aice, reg_arch_info->num,
-					&(reg_arch_info->value_64));
+			retval = aice_read_reg_64(aice, reg_arch_info->num, &val);
 		}
+		buf_set_u64(reg_arch_info->value, 0, 64, val);
 	}
 
 	if (retval == ERROR_OK) {
@@ -309,7 +307,7 @@ static int nds32_set_core_reg(struct reg *reg, uint8_t *buf)
 	if (nds32_reg_exception(mapped_regnum, value))
 		return ERROR_OK;
 
-	LOG_DEBUG("writing register %i(%s) with value 0x%8.8" PRIx32,
+	LOG_DEBUG("writing register %" PRIi32 "(%s) with value 0x%8.8" PRIx32,
 			reg_arch_info->num, reg->name, value);
 
 	if ((nds32->fpu_enable == false) &&
@@ -322,11 +320,13 @@ static int nds32_set_core_reg(struct reg *reg, uint8_t *buf)
 		buf_set_u32(reg->value, 0, 32, 0);
 	} else {
 		buf_set_u32(reg->value, 0, 32, value);
-		aice_write_register(aice, mapped_regnum, reg_arch_info->value);
+		uint32_t val = buf_get_u32(reg_arch_info->value, 0, 32);
+		aice_write_register(aice, mapped_regnum, val);
 
 		/* After set value to registers, read the value from target
 		 * to avoid W1C inconsistency. */
-		aice_read_register(aice, mapped_regnum, &(reg_arch_info->value));
+		aice_read_register(aice, mapped_regnum, &val);
+		buf_set_u32(reg_arch_info->value, 0, 32, val);
 	}
 
 	reg->valid = true;
@@ -395,7 +395,7 @@ static const struct reg_arch_type nds32_reg_access_type_64 = {
 static struct reg_cache *nds32_build_reg_cache(struct target *target,
 		struct nds32 *nds32)
 {
-	struct reg_cache *cache = malloc(sizeof(struct reg_cache));
+	struct reg_cache *cache = calloc(sizeof(struct reg_cache), 1);
 	struct reg *reg_list = calloc(TOTAL_REG_NUM, sizeof(struct reg));
 	struct nds32_reg *reg_arch_info = calloc(TOTAL_REG_NUM, sizeof(struct nds32_reg));
 	int i;
@@ -423,17 +423,17 @@ static struct reg_cache *nds32_build_reg_cache(struct target *target,
 		reg_list[i].size = nds32_reg_size(i);
 		reg_list[i].arch_info = &reg_arch_info[i];
 
-		reg_list[i].reg_data_type = malloc(sizeof(struct reg_data_type));
+		reg_list[i].reg_data_type = calloc(sizeof(struct reg_data_type), 1);
 
 		if (FD0 <= reg_arch_info[i].num && reg_arch_info[i].num <= FD31) {
-			reg_list[i].value = &(reg_arch_info[i].value_64);
+			reg_list[i].value = reg_arch_info[i].value;
 			reg_list[i].type = &nds32_reg_access_type_64;
 
 			reg_list[i].reg_data_type->type = REG_TYPE_IEEE_DOUBLE;
 			reg_list[i].reg_data_type->id = "ieee_double";
 			reg_list[i].group = "float";
 		} else {
-			reg_list[i].value = &(reg_arch_info[i].value);
+			reg_list[i].value = reg_arch_info[i].value;
 			reg_list[i].type = &nds32_reg_access_type;
 			reg_list[i].group = "general";
 
@@ -823,7 +823,7 @@ int nds32_read_memory(struct target *target, uint32_t address,
 	return aice_read_mem_unit(aice, address, size, count, buffer);
 }
 
-int nds32_read_phys_memory(struct target *target, uint32_t address,
+int nds32_read_phys_memory(struct target *target, target_addr_t address,
 		uint32_t size, uint32_t count, uint8_t *buffer)
 {
 	struct aice_port_s *aice = target_to_aice(target);
@@ -932,7 +932,7 @@ int nds32_write_memory(struct target *target, uint32_t address,
 	return aice_write_mem_unit(aice, address, size, count, buffer);
 }
 
-int nds32_write_phys_memory(struct target *target, uint32_t address,
+int nds32_write_phys_memory(struct target *target, target_addr_t address,
 		uint32_t size, uint32_t count, const uint8_t *buffer)
 {
 	struct aice_port_s *aice = target_to_aice(target);
@@ -1545,14 +1545,18 @@ int nds32_restore_context(struct target *target)
 			if (reg->valid == true) {
 
 				LOG_DEBUG("examining dirty reg: %s", reg->name);
-				LOG_DEBUG("writing register %i "
-						"with value 0x%8.8" PRIx32, i, buf_get_u32(reg->value, 0, 32));
+				LOG_DEBUG("writing register %d with value 0x%8.8" PRIx32,
+						i, buf_get_u32(reg->value, 0, 32));
 
 				reg_arch_info = reg->arch_info;
-				if (FD0 <= reg_arch_info->num && reg_arch_info->num <= FD31)
-					aice_write_reg_64(aice, reg_arch_info->num, reg_arch_info->value_64);
-				else
-					aice_write_register(aice, reg_arch_info->num, reg_arch_info->value);
+				if (FD0 <= reg_arch_info->num && reg_arch_info->num <= FD31) {
+					uint64_t val = buf_get_u64(reg_arch_info->value, 0, 64);
+					aice_write_reg_64(aice, reg_arch_info->num, val);
+				} else {
+					uint32_t val = buf_get_u32(reg_arch_info->value, 0, 32);
+					aice_write_register(aice, reg_arch_info->num, val);
+				}
+
 				reg->valid = true;
 				reg->dirty = false;
 			}
@@ -1572,7 +1576,7 @@ int nds32_edm_config(struct nds32 *nds32)
 	aice_read_debug_reg(aice, NDS_EDM_SR_EDM_CFG, &edm_cfg);
 
 	nds32->edm.version = (edm_cfg >> 16) & 0xFFFF;
-	LOG_INFO("EDM version 0x%04" PRIx32, nds32->edm.version);
+	LOG_INFO("EDM version 0x%04x", nds32->edm.version);
 
 	nds32->edm.breakpoint_num = (edm_cfg & 0x7) + 1;
 
@@ -1644,7 +1648,20 @@ int nds32_init_arch_info(struct target *target, struct nds32 *nds32)
 	nds32->reset_halt_as_examine = false;
 	nds32->keep_target_edm_ctl = false;
 	nds32->word_access_mem = false;
-	nds32->virtual_hosting = false;
+	nds32->virtual_hosting = true;
+	nds32->hit_syscall = false;
+	nds32->active_syscall_id = NDS32_SYSCALL_UNDEFINED;
+	nds32->virtual_hosting_errno = 0;
+	nds32->virtual_hosting_ctrl_c = false;
+	nds32->attached = false;
+
+	nds32->syscall_break.asid = 0;
+	nds32->syscall_break.length = 4;
+	nds32->syscall_break.set = 0;
+	nds32->syscall_break.orig_instr = NULL;
+	nds32->syscall_break.next = NULL;
+	nds32->syscall_break.unique_id = 0x515CAll + target->target_number;
+	nds32->syscall_break.linked_BRP = 0;
 
 	nds32_reg_init();
 
@@ -1657,7 +1674,7 @@ int nds32_init_arch_info(struct target *target, struct nds32 *nds32)
 	return ERROR_OK;
 }
 
-int nds32_virtual_to_physical(struct target *target, uint32_t address, uint32_t *physical)
+int nds32_virtual_to_physical(struct target *target, target_addr_t address, target_addr_t *physical)
 {
 	struct nds32 *nds32 = target_to_nds32(target);
 
@@ -1675,7 +1692,7 @@ int nds32_virtual_to_physical(struct target *target, uint32_t address, uint32_t
 	return ERROR_FAIL;
 }
 
-int nds32_cache_sync(struct target *target, uint32_t address, uint32_t length)
+int nds32_cache_sync(struct target *target, target_addr_t address, uint32_t length)
 {
 	struct aice_port_s *aice = target_to_aice(target);
 	struct nds32 *nds32 = target_to_nds32(target);
@@ -1721,7 +1738,7 @@ int nds32_cache_sync(struct target *target, uint32_t address, uint32_t length)
 			/* Because PSW.IT is turned off under debug exception, address MUST
 			 * be physical address.  L1I_VA_INVALIDATE uses PSW.IT to decide
 			 * address translation or not. */
-			uint32_t physical_addr;
+			target_addr_t physical_addr;
 			if (ERROR_FAIL == target->type->virt2phys(target, cur_address,
 						&physical_addr))
 				return ERROR_FAIL;
@@ -1747,7 +1764,7 @@ uint32_t nds32_nextpc(struct nds32 *nds32, int current, uint32_t address)
 }
 
 int nds32_step(struct target *target, int current,
-		uint32_t address, int handle_breakpoints)
+		target_addr_t address, int handle_breakpoints)
 {
 	LOG_DEBUG("target->state: %s",
 			target_state_name(target));
@@ -1761,7 +1778,7 @@ int nds32_step(struct target *target, int current,
 
 	address = nds32_nextpc(nds32, current, address);
 
-	LOG_DEBUG("STEP PC %08" PRIx32 "%s", address, !current ? "!" : "");
+	LOG_DEBUG("STEP PC %08" TARGET_PRIxADDR "%s", address, !current ? "!" : "");
 
 	/** set DSSIM */
 	uint32_t ir14_value;
@@ -1772,13 +1789,24 @@ int nds32_step(struct target *target, int current,
 		ir14_value &= ~(0x1 << 31);
 	nds32_set_mapped_reg(nds32, IR14, ir14_value);
 
+	/* check hit_syscall before leave_debug_state() because
+	 * leave_debug_state() may clear hit_syscall flag */
+	bool no_step = false;
+	if (nds32->hit_syscall)
+		/* step after hit_syscall should be ignored because
+		 * leave_debug_state will step implicitly to skip the
+		 * syscall */
+		no_step = true;
+
 	/********* TODO: maybe create another function to handle this part */
 	CHECK_RETVAL(nds32->leave_debug_state(nds32, true));
 	CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_RESUMED));
 
-	struct aice_port_s *aice = target_to_aice(target);
-	if (ERROR_OK != aice_step(aice))
-		return ERROR_FAIL;
+	if (no_step == false) {
+		struct aice_port_s *aice = target_to_aice(target);
+		if (ERROR_OK != aice_step(aice))
+			return ERROR_FAIL;
+	}
 
 	/* save state */
 	CHECK_RETVAL(nds32->enter_debug_state(nds32, true));
@@ -1878,6 +1906,12 @@ int nds32_examine_debug_reason(struct nds32 *nds32)
 	uint32_t reason;
 	struct target *target = nds32->target;
 
+	if (nds32->hit_syscall == true) {
+		LOG_DEBUG("Hit syscall breakpoint");
+		target->debug_reason = DBG_REASON_BREAKPOINT;
+		return ERROR_OK;
+	}
+
 	nds32->get_debug_reason(nds32, &reason);
 
 	LOG_DEBUG("nds32 examines debug reason: %s", nds32_debug_type_name[reason]);
@@ -1900,7 +1934,13 @@ int nds32_examine_debug_reason(struct nds32 *nds32)
 							&instruction))
 					return ERROR_FAIL;
 
-				target->debug_reason = DBG_REASON_BREAKPOINT;
+				/* hit 'break 0x7FFF' */
+				if ((instruction.info.opc_6 == 0x32) &&
+					(instruction.info.sub_opc == 0xA) &&
+					(instruction.info.imm == 0x7FFF)) {
+					target->debug_reason = DBG_REASON_EXIT;
+				} else
+					target->debug_reason = DBG_REASON_BREAKPOINT;
 			}
 			break;
 		case NDS32_DEBUG_DATA_ADDR_WATCHPOINT_PRECISE:
@@ -1972,7 +2012,7 @@ int nds32_login(struct nds32 *nds32)
 			code_str[copy_length] = '\0';
 			code = strtoul(code_str, NULL, 16);
 
-			sprintf(command_str, "write_misc gen_port0 0x%x;", code);
+			sprintf(command_str, "write_misc gen_port0 0x%" PRIx32 ";", code);
 			strcat(command_sequence, command_str);
 		}
 
@@ -1997,7 +2037,7 @@ int nds32_login(struct nds32 *nds32)
 			else
 				return ERROR_FAIL;
 
-			sprintf(command_str, "write_misc %s 0x%x;", reg_name, code);
+			sprintf(command_str, "write_misc %s 0x%" PRIx32 ";", reg_name, code);
 			if (ERROR_OK != aice_program_edm(aice, command_str))
 				return ERROR_FAIL;
 		}
@@ -2080,9 +2120,11 @@ int nds32_poll(struct target *target)
 }
 
 int nds32_resume(struct target *target, int current,
-		uint32_t address, int handle_breakpoints, int debug_execution)
+		target_addr_t address, int handle_breakpoints, int debug_execution)
 {
-	LOG_DEBUG("current %d  address %08x  handle_breakpoints %d  debug_execution %d",
+	LOG_DEBUG("current %d address %08" TARGET_PRIxADDR
+			" handle_breakpoints %d"
+			" debug_execution %d",
 			current, address, handle_breakpoints, debug_execution);
 
 	struct nds32 *nds32 = target_to_nds32(target);
@@ -2094,7 +2136,7 @@ int nds32_resume(struct target *target, int current,
 
 	address = nds32_nextpc(nds32, current, address);
 
-	LOG_DEBUG("RESUME PC %08" PRIx32 "%s", address, !current ? "!" : "");
+	LOG_DEBUG("RESUME PC %08" TARGET_PRIxADDR "%s", address, !current ? "!" : "");
 
 	if (!debug_execution)
 		target_free_all_working_areas(target);
@@ -2110,8 +2152,11 @@ int nds32_resume(struct target *target, int current,
 	CHECK_RETVAL(nds32->leave_debug_state(nds32, true));
 	CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_RESUMED));
 
-	struct aice_port_s *aice = target_to_aice(target);
-	aice_run(aice);
+	if (nds32->virtual_hosting_ctrl_c == false) {
+		struct aice_port_s *aice = target_to_aice(target);
+		aice_run(aice);
+	} else
+		nds32->virtual_hosting_ctrl_c = false;
 
 	target->debug_reason = DBG_REASON_NOTHALTED;
 	if (!debug_execution)
@@ -2125,16 +2170,48 @@ int nds32_resume(struct target *target, int current,
 	return ERROR_OK;
 }
 
+static int nds32_soft_reset_halt(struct target *target)
+{
+	/* TODO: test it */
+	struct nds32 *nds32 = target_to_nds32(target);
+	struct aice_port_s *aice = target_to_aice(target);
+
+	aice_assert_srst(aice, AICE_SRST);
+
+	/* halt core and set pc to 0x0 */
+	int retval = target_halt(target);
+	if (retval != ERROR_OK)
+		return retval;
+
+	/* start fetching from IVB */
+	uint32_t value_ir3;
+	nds32_get_mapped_reg(nds32, IR3, &value_ir3);
+	nds32_set_mapped_reg(nds32, PC, value_ir3 & 0xFFFF0000);
+
+	return ERROR_OK;
+}
+
 int nds32_assert_reset(struct target *target)
 {
 	struct nds32 *nds32 = target_to_nds32(target);
 	struct aice_port_s *aice = target_to_aice(target);
+	struct nds32_cpu_version *cpu_version = &(nds32->cpu_version);
 
-	jtag_poll_set_enabled(true);
+	/* TODO: apply hw reset signal in not examined state */
+	if (!(target_was_examined(target))) {
+		LOG_WARNING("Reset is not asserted because the target is not examined.");
+		LOG_WARNING("Use a reset button or power cycle the target.");
+		return ERROR_TARGET_NOT_EXAMINED;
+	}
 
 	if (target->reset_halt) {
-		if (nds32->soft_reset_halt)
-			target->type->soft_reset_halt(target);
+		if ((nds32->soft_reset_halt)
+			|| (nds32->edm.version < 0x51)
+			|| ((nds32->edm.version == 0x51)
+				&& (cpu_version->revision == 0x1C)
+				&& (cpu_version->cpu_id_family == 0xC)
+				&& (cpu_version->cpu_id_version == 0x0)))
+			nds32_soft_reset_halt(target);
 		else
 			aice_assert_srst(aice, AICE_RESET_HOLD);
 	} else {
@@ -2153,25 +2230,21 @@ int nds32_assert_reset(struct target *target)
 	return ERROR_OK;
 }
 
-static uint32_t nds32_backup_edm_ctl;
-static bool gdb_attached;
-
 static int nds32_gdb_attach(struct nds32 *nds32)
 {
-	LOG_DEBUG("nds32_gdb_attach");
+	LOG_DEBUG("nds32_gdb_attach, target coreid: %" PRId32, nds32->target->coreid);
 
-	if (gdb_attached == false) {
+	if (nds32->attached == false) {
 
 		if (nds32->keep_target_edm_ctl) {
 			/* backup target EDM_CTL */
 			struct aice_port_s *aice = target_to_aice(nds32->target);
-			aice_read_debug_reg(aice, NDS_EDM_SR_EDM_CTL, &nds32_backup_edm_ctl);
+			aice_read_debug_reg(aice, NDS_EDM_SR_EDM_CTL, &nds32->backup_edm_ctl);
 		}
 
 		target_halt(nds32->target);
-		target_poll(nds32->target);
 
-		gdb_attached = true;
+		nds32->attached = true;
 	}
 
 	return ERROR_OK;
@@ -2182,7 +2255,7 @@ static int nds32_gdb_detach(struct nds32 *nds32)
 	LOG_DEBUG("nds32_gdb_detach");
 	bool backup_virtual_hosting_setting;
 
-	if (gdb_attached) {
+	if (nds32->attached) {
 
 		backup_virtual_hosting_setting = nds32->virtual_hosting;
 		/* turn off virtual hosting before resume as gdb-detach */
@@ -2193,13 +2266,10 @@ static int nds32_gdb_detach(struct nds32 *nds32)
 		if (nds32->keep_target_edm_ctl) {
 			/* restore target EDM_CTL */
 			struct aice_port_s *aice = target_to_aice(nds32->target);
-			aice_write_debug_reg(aice, NDS_EDM_SR_EDM_CTL, nds32_backup_edm_ctl);
+			aice_write_debug_reg(aice, NDS_EDM_SR_EDM_CTL, nds32->backup_edm_ctl);
 		}
 
-		/* turn off polling */
-		jtag_poll_set_enabled(false);
-
-		gdb_attached = false;
+		nds32->attached = false;
 	}
 
 	return ERROR_OK;
@@ -2209,7 +2279,12 @@ static int nds32_callback_event_handler(struct target *target,
 		enum target_event event, void *priv)
 {
 	int retval = ERROR_OK;
-	struct nds32 *nds32 = priv;
+	int target_number = *(int *)priv;
+
+	if (target_number != target->target_number)
+		return ERROR_OK;
+
+	struct nds32 *nds32 = target_to_nds32(target);
 
 	switch (event) {
 		case TARGET_EVENT_GDB_ATTACH:
@@ -2230,15 +2305,318 @@ int nds32_init(struct nds32 *nds32)
 	/* Initialize anything we can set up without talking to the target */
 	nds32->memory.access_channel = NDS_MEMORY_ACC_CPU;
 
-	/* turn off polling by default */
-	jtag_poll_set_enabled(false);
-
 	/* register event callback */
-	target_register_event_callback(nds32_callback_event_handler, nds32);
+	target_register_event_callback(nds32_callback_event_handler,
+			&(nds32->target->target_number));
+
+	return ERROR_OK;
+}
+
+int nds32_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info)
+{
+	/* fill syscall parameters to file-I/O info */
+	if (NULL == fileio_info) {
+		LOG_ERROR("Target has not initial file-I/O data structure");
+		return ERROR_FAIL;
+	}
+
+	struct nds32 *nds32 = target_to_nds32(target);
+	uint32_t value_ir6;
+	uint32_t syscall_id;
+
+	if (nds32->hit_syscall == false)
+		return ERROR_FAIL;
+
+	nds32_get_mapped_reg(nds32, IR6, &value_ir6);
+	syscall_id = (value_ir6 >> 16) & 0x7FFF;
+	nds32->active_syscall_id = syscall_id;
+
+	LOG_DEBUG("hit syscall ID: 0x%" PRIx32, syscall_id);
+
+	/* free previous identifier storage */
+	if (NULL != fileio_info->identifier) {
+		free(fileio_info->identifier);
+		fileio_info->identifier = NULL;
+	}
+
+	switch (syscall_id) {
+		case NDS32_SYSCALL_EXIT:
+			fileio_info->identifier = malloc(5);
+			sprintf(fileio_info->identifier, "exit");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			break;
+		case NDS32_SYSCALL_OPEN:
+			{
+				uint8_t filename[256];
+				fileio_info->identifier = malloc(5);
+				sprintf(fileio_info->identifier, "open");
+				nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+				/* reserve fileio_info->param_2 for length of path */
+				nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_3));
+				nds32_get_mapped_reg(nds32, R2, &(fileio_info->param_4));
+
+				target->type->read_buffer(target, fileio_info->param_1,
+						256, filename);
+				fileio_info->param_2 = strlen((char *)filename) + 1;
+			}
+			break;
+		case NDS32_SYSCALL_CLOSE:
+			fileio_info->identifier = malloc(6);
+			sprintf(fileio_info->identifier, "close");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			break;
+		case NDS32_SYSCALL_READ:
+			fileio_info->identifier = malloc(5);
+			sprintf(fileio_info->identifier, "read");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_2));
+			nds32_get_mapped_reg(nds32, R2, &(fileio_info->param_3));
+			break;
+		case NDS32_SYSCALL_WRITE:
+			fileio_info->identifier = malloc(6);
+			sprintf(fileio_info->identifier, "write");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_2));
+			nds32_get_mapped_reg(nds32, R2, &(fileio_info->param_3));
+			break;
+		case NDS32_SYSCALL_LSEEK:
+			fileio_info->identifier = malloc(6);
+			sprintf(fileio_info->identifier, "lseek");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_2));
+			nds32_get_mapped_reg(nds32, R2, &(fileio_info->param_3));
+			break;
+		case NDS32_SYSCALL_UNLINK:
+			{
+				uint8_t filename[256];
+				fileio_info->identifier = malloc(7);
+				sprintf(fileio_info->identifier, "unlink");
+				nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+				/* reserve fileio_info->param_2 for length of path */
+
+				target->type->read_buffer(target, fileio_info->param_1,
+						256, filename);
+				fileio_info->param_2 = strlen((char *)filename) + 1;
+			}
+			break;
+		case NDS32_SYSCALL_RENAME:
+			{
+				uint8_t filename[256];
+				fileio_info->identifier = malloc(7);
+				sprintf(fileio_info->identifier, "rename");
+				nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+				/* reserve fileio_info->param_2 for length of old path */
+				nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_3));
+				/* reserve fileio_info->param_4 for length of new path */
+
+				target->type->read_buffer(target, fileio_info->param_1,
+						256, filename);
+				fileio_info->param_2 = strlen((char *)filename) + 1;
+
+				target->type->read_buffer(target, fileio_info->param_3,
+						256, filename);
+				fileio_info->param_4 = strlen((char *)filename) + 1;
+			}
+			break;
+		case NDS32_SYSCALL_FSTAT:
+			fileio_info->identifier = malloc(6);
+			sprintf(fileio_info->identifier, "fstat");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_2));
+			break;
+		case NDS32_SYSCALL_STAT:
+			{
+				uint8_t filename[256];
+				fileio_info->identifier = malloc(5);
+				sprintf(fileio_info->identifier, "stat");
+				nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+				/* reserve fileio_info->param_2 for length of old path */
+				nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_3));
+
+				target->type->read_buffer(target, fileio_info->param_1,
+						256, filename);
+				fileio_info->param_2 = strlen((char *)filename) + 1;
+			}
+			break;
+		case NDS32_SYSCALL_GETTIMEOFDAY:
+			fileio_info->identifier = malloc(13);
+			sprintf(fileio_info->identifier, "gettimeofday");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			nds32_get_mapped_reg(nds32, R1, &(fileio_info->param_2));
+			break;
+		case NDS32_SYSCALL_ISATTY:
+			fileio_info->identifier = malloc(7);
+			sprintf(fileio_info->identifier, "isatty");
+			nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+			break;
+		case NDS32_SYSCALL_SYSTEM:
+			{
+				uint8_t command[256];
+				fileio_info->identifier = malloc(7);
+				sprintf(fileio_info->identifier, "system");
+				nds32_get_mapped_reg(nds32, R0, &(fileio_info->param_1));
+				/* reserve fileio_info->param_2 for length of old path */
+
+				target->type->read_buffer(target, fileio_info->param_1,
+						256, command);
+				fileio_info->param_2 = strlen((char *)command) + 1;
+			}
+			break;
+		case NDS32_SYSCALL_ERRNO:
+			fileio_info->identifier = malloc(6);
+			sprintf(fileio_info->identifier, "errno");
+			nds32_set_mapped_reg(nds32, R0, nds32->virtual_hosting_errno);
+			break;
+		default:
+			fileio_info->identifier = malloc(8);
+			sprintf(fileio_info->identifier, "unknown");
+			break;
+	}
 
 	return ERROR_OK;
 }
 
+int nds32_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c)
+{
+	LOG_DEBUG("syscall return code: 0x%x, errno: 0x%x , ctrl_c: %s",
+			retcode, fileio_errno, ctrl_c ? "true" : "false");
+
+	struct nds32 *nds32 = target_to_nds32(target);
+
+	nds32_set_mapped_reg(nds32, R0, (uint32_t)retcode);
+
+	nds32->virtual_hosting_errno = fileio_errno;
+	nds32->virtual_hosting_ctrl_c = ctrl_c;
+	nds32->active_syscall_id = NDS32_SYSCALL_UNDEFINED;
+
+	return ERROR_OK;
+}
+
+int nds32_profiling(struct target *target, uint32_t *samples,
+			uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
+{
+	/* sample $PC every 10 milliseconds */
+	uint32_t iteration = seconds * 100;
+	struct aice_port_s *aice = target_to_aice(target);
+	struct nds32 *nds32 = target_to_nds32(target);
+
+	if (max_num_samples < iteration)
+		iteration = max_num_samples;
+
+	int pc_regnum = nds32->register_map(nds32, PC);
+	aice_profiling(aice, 10, iteration, pc_regnum, samples, num_samples);
+
+	register_cache_invalidate(nds32->core_cache);
+
+	return ERROR_OK;
+}
+
+int nds32_gdb_fileio_write_memory(struct nds32 *nds32, uint32_t address,
+		uint32_t size, const uint8_t *buffer)
+{
+	if ((NDS32_SYSCALL_FSTAT == nds32->active_syscall_id) ||
+			(NDS32_SYSCALL_STAT == nds32->active_syscall_id)) {
+		/* If doing GDB file-I/O, target should convert 'struct stat'
+		 * from gdb-format to target-format */
+		uint8_t stat_buffer[NDS32_STRUCT_STAT_SIZE];
+		/* st_dev 2 */
+		stat_buffer[0] = buffer[3];
+		stat_buffer[1] = buffer[2];
+		/* st_ino 2 */
+		stat_buffer[2] = buffer[7];
+		stat_buffer[3] = buffer[6];
+		/* st_mode 4 */
+		stat_buffer[4] = buffer[11];
+		stat_buffer[5] = buffer[10];
+		stat_buffer[6] = buffer[9];
+		stat_buffer[7] = buffer[8];
+		/* st_nlink 2 */
+		stat_buffer[8] = buffer[15];
+		stat_buffer[9] = buffer[16];
+		/* st_uid 2 */
+		stat_buffer[10] = buffer[19];
+		stat_buffer[11] = buffer[18];
+		/* st_gid 2 */
+		stat_buffer[12] = buffer[23];
+		stat_buffer[13] = buffer[22];
+		/* st_rdev 2 */
+		stat_buffer[14] = buffer[27];
+		stat_buffer[15] = buffer[26];
+		/* st_size 4 */
+		stat_buffer[16] = buffer[35];
+		stat_buffer[17] = buffer[34];
+		stat_buffer[18] = buffer[33];
+		stat_buffer[19] = buffer[32];
+		/* st_atime 4 */
+		stat_buffer[20] = buffer[55];
+		stat_buffer[21] = buffer[54];
+		stat_buffer[22] = buffer[53];
+		stat_buffer[23] = buffer[52];
+		/* st_spare1 4 */
+		stat_buffer[24] = 0;
+		stat_buffer[25] = 0;
+		stat_buffer[26] = 0;
+		stat_buffer[27] = 0;
+		/* st_mtime 4 */
+		stat_buffer[28] = buffer[59];
+		stat_buffer[29] = buffer[58];
+		stat_buffer[30] = buffer[57];
+		stat_buffer[31] = buffer[56];
+		/* st_spare2 4 */
+		stat_buffer[32] = 0;
+		stat_buffer[33] = 0;
+		stat_buffer[34] = 0;
+		stat_buffer[35] = 0;
+		/* st_ctime 4 */
+		stat_buffer[36] = buffer[63];
+		stat_buffer[37] = buffer[62];
+		stat_buffer[38] = buffer[61];
+		stat_buffer[39] = buffer[60];
+		/* st_spare3 4 */
+		stat_buffer[40] = 0;
+		stat_buffer[41] = 0;
+		stat_buffer[42] = 0;
+		stat_buffer[43] = 0;
+		/* st_blksize 4 */
+		stat_buffer[44] = buffer[43];
+		stat_buffer[45] = buffer[42];
+		stat_buffer[46] = buffer[41];
+		stat_buffer[47] = buffer[40];
+		/* st_blocks 4 */
+		stat_buffer[48] = buffer[51];
+		stat_buffer[49] = buffer[50];
+		stat_buffer[50] = buffer[49];
+		stat_buffer[51] = buffer[48];
+		/* st_spare4 8 */
+		stat_buffer[52] = 0;
+		stat_buffer[53] = 0;
+		stat_buffer[54] = 0;
+		stat_buffer[55] = 0;
+		stat_buffer[56] = 0;
+		stat_buffer[57] = 0;
+		stat_buffer[58] = 0;
+		stat_buffer[59] = 0;
+
+		return nds32_write_buffer(nds32->target, address, NDS32_STRUCT_STAT_SIZE, stat_buffer);
+	} else if (NDS32_SYSCALL_GETTIMEOFDAY == nds32->active_syscall_id) {
+		/* If doing GDB file-I/O, target should convert 'struct timeval'
+		 * from gdb-format to target-format */
+		uint8_t timeval_buffer[NDS32_STRUCT_TIMEVAL_SIZE];
+		timeval_buffer[0] = buffer[3];
+		timeval_buffer[1] = buffer[2];
+		timeval_buffer[2] = buffer[1];
+		timeval_buffer[3] = buffer[0];
+		timeval_buffer[4] = buffer[11];
+		timeval_buffer[5] = buffer[10];
+		timeval_buffer[6] = buffer[9];
+		timeval_buffer[7] = buffer[8];
+
+		return nds32_write_buffer(nds32->target, address, NDS32_STRUCT_TIMEVAL_SIZE, timeval_buffer);
+	}
+
+	return nds32_write_buffer(nds32->target, address, size, buffer);
+}
+
 int nds32_reset_halt(struct nds32 *nds32)
 {
 	LOG_INFO("reset halt as init");