Merge branch 'feature/add_esp_common_component' into 'master'

esp_common: add stack check function for gcc

See merge request sdk/ESP8266_RTOS_SDK!1059

Author: donghengqaz

components/esp_common/CMakeLists.txt

@@ -0,0 +1,16 @@
+if(BOOTLOADER_BUILD)
+    # For bootloader, all we need from esp_common is headers
+    idf_component_register(INCLUDE_DIRS include)
+    set_property(TARGET ${COMPONENT_LIB} APPEND PROPERTY INTERFACE_LINK_LIBRARIES "-Wl,--gc-sections")
+else()
+    # Regular app build
+    idf_component_register(SRCS "src/stack_check.c"
+                        INCLUDE_DIRS include)
+
+    set_source_files_properties(
+        "src/stack_check.c"
+        PROPERTIES COMPILE_FLAGS
+        -fno-stack-protector)
+    set_property(TARGET ${COMPONENT_LIB} APPEND PROPERTY LINK_LIBRARIES "-Wl,--gc-sections")
+    set_property(TARGET ${COMPONENT_LIB} APPEND PROPERTY INTERFACE_LINK_LIBRARIES "-Wl,--gc-sections")
+endif()

components/esp_common/component.mk

@@ -0,0 +1,9 @@
+#
+# Component Makefile
+#
+
+COMPONENT_ADD_INCLUDEDIRS := include
+COMPONENT_SRCDIRS := src
+
+# disable stack protection in files which are involved in initialization of that feature
+src/stack_check.o: CFLAGS := $(filter-out -fstack-protector%, $(CFLAGS))

components/esp_common/include/esp_bit_defs.h

@@ -0,0 +1,57 @@
+// Copyright 2010-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed 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.
+
+#pragma once
+
+//Register Bits{{
+#define BIT31   0x80000000
+#define BIT30   0x40000000
+#define BIT29   0x20000000
+#define BIT28   0x10000000
+#define BIT27   0x08000000
+#define BIT26   0x04000000
+#define BIT25   0x02000000
+#define BIT24   0x01000000
+#define BIT23   0x00800000
+#define BIT22   0x00400000
+#define BIT21   0x00200000
+#define BIT20   0x00100000
+#define BIT19   0x00080000
+#define BIT18   0x00040000
+#define BIT17   0x00020000
+#define BIT16   0x00010000
+#define BIT15   0x00008000
+#define BIT14   0x00004000
+#define BIT13   0x00002000
+#define BIT12   0x00001000
+#define BIT11   0x00000800
+#define BIT10   0x00000400
+#define BIT9     0x00000200
+#define BIT8     0x00000100
+#define BIT7     0x00000080
+#define BIT6     0x00000040
+#define BIT5     0x00000020
+#define BIT4     0x00000010
+#define BIT3     0x00000008
+#define BIT2     0x00000004
+#define BIT1     0x00000002
+#define BIT0     0x00000001
+//}}
+
+#ifndef __ASSEMBLER__
+#define BIT(nr)                 (1UL << (nr))
+#define BIT64(nr)               (1ULL << (nr))
+#else
+#define BIT(nr)                 (1 << (nr))
+#endif

components/esp_common/src/stack_check.c

@@ -0,0 +1,40 @@
+// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed 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.
+
+#include <stdlib.h>
+#include "sdkconfig.h"
+#include "esp_system.h"
+
+#if CONFIG_COMPILER_STACK_CHECK
+
+#define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
+#include "esp_log.h"
+const static char *TAG = "stack_chk";
+
+void *__stack_chk_guard = NULL;
+
+static void __attribute__ ((constructor))
+__esp_stack_guard_setup (void)
+{
+    ESP_LOGD(TAG, "Intialize random stack guard");
+    __stack_chk_guard = (void *)esp_random();
+}
+
+void __stack_chk_fail (void)
+{
+    ets_printf("\r\nStack smashing protect failure!\r\n\r\n");
+    abort();
+}
+
+#endif