xiaoxiang781216 commented on a change in pull request #4935: URL: https://github.com/apache/incubator-nuttx/pull/4935#discussion_r761961450
########## File path: arch/arm/src/common/arm_tls.c ########## @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/arm/src/common/arm_tls.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> +#include <nuttx/tls.h> + +#include "arm_internal.h" + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_tls_size + * + * Description: + * Get tls (tdata + tbss) section size + * + * Returned Value: + * Size of (tdata + tbss) + * + ****************************************************************************/ + +int up_tls_size(void) +{ + /* Extra 8 byte (2 pointer) according to GCC */ + + return _END_TBSS - _START_TDATA + 8; Review comment: move +8 to first since the extra data locate at the beginning ########## File path: sched/Kconfig ########## @@ -600,6 +600,13 @@ config SCHED_USER_IDENTITY Those can then be managed using the interfaces. Child tasks will inherit the UID and GID of its parent. +config SCHED_THREAD_LOCAL + bool "Support __thread keyword" + default n + depends on ARCH_ARM Review comment: ARCH_ARM to ARCH_HAVE_TLS ########## File path: arch/Kconfig ########## @@ -422,6 +427,14 @@ config ARCH_USE_TEXT_HEAP regions for instruction and data and the memory region used for usual malloc doesn't work for instruction. +config ARCH_TLS + bool "Enable TLS" + default n + depends on ARCH_HAVE_TLS && BUILD_FLAT Review comment: can we support TLS in protected build too? ########## File path: arch/arm/src/common/arm_tls.c ########## @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/arm/src/common/arm_tls.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> +#include <nuttx/tls.h> + +#include "arm_internal.h" + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_tls_size + * + * Description: + * Get tls (tdata + tbss) section size + * + * Returned Value: + * Size of (tdata + tbss) + * + ****************************************************************************/ + +int up_tls_size(void) +{ + /* Extra 8 byte (2 pointer) according to GCC */ + + return _END_TBSS - _START_TDATA + 8; +} + +/**************************************************************************** + * Name: up_tls_initialize + * + * Description: + * Initialize thread local region + * + * Input Parameters: + * tls_data - The memory region to initialize + * + ****************************************************************************/ + +void up_tls_initialize(uint8_t *tls_data) +{ + memcpy(&tls_data[8], _START_TDATA, _END_TDATA - _START_TDATA); + memset(&tls_data[_END_TDATA - _START_TDATA + 8], 0, Review comment: move +8 to first ########## File path: include/nuttx/arch.h ########## @@ -2398,6 +2398,40 @@ int up_rtc_getdatetime_with_subseconds(FAR struct tm *tp, FAR long *nsec); int up_rtc_settime(FAR const struct timespec *tp); #endif +/**************************************************************************** + * Name: up_tls_size + * + * Description: + * Get tls (tdata + tbss) section size + * + * Returned Value: + * Size of (tdata + tbss) + * + ****************************************************************************/ + +#ifdef CONFIG_ARCH_TLS +int up_tls_size(void); +#else +#define up_tls_size() 0 +#endif + +/**************************************************************************** + * Name: up_tls_initialize + * + * Description: + * Initialize thread local region + * + * Input Parameters: + * tls_data - The memory region to initialize + * + ****************************************************************************/ + +#ifdef CONFIG_ARCH_TLS +void up_tls_initialize(uint8_t *tls_data); Review comment: uin8_t * to FAR void * ########## File path: arch/Kconfig ########## @@ -352,6 +353,10 @@ config ARCH_HAVE_TESTSET bool default n +config ARCH_HAVE_TLS Review comment: ARCH_HAVE_TLS to ARCH_HAVE_THREAD_LOCAL? the supported from tls can be done in the general way, only thread_local keyword need arch or compiler specific code ########## File path: arch/Kconfig ########## @@ -422,6 +427,14 @@ config ARCH_USE_TEXT_HEAP regions for instruction and data and the memory region used for usual malloc doesn't work for instruction. +config ARCH_TLS Review comment: is it enough to control thread_local only through SCHED_THREAD_LOCAL? -- This is an automated message from the Apache Git Service. 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