Merge branch 'feature/refactor_link_section' into 'master'

Refactor link section

See merge request sdk/ESP8266_RTOS_SDK!832

components/esp8266/include/esp_attr.h

@@ -26,10 +26,10 @@
 #define ICACHE_RODATA_ATTR
 
 // Forces code into IRAM instead of flash.
-#define IRAM_ATTR __attribute__((section(".iram1")))
+#define IRAM_ATTR _SECTION_ATTR_IMPL(".iram1", __COUNTER__)
 
 // Forces data into DRAM instead of flash
-#define DRAM_ATTR __attribute__((section(".dram0")))
+#define DRAM_ATTR _SECTION_ATTR_IMPL(".dram0", __COUNTER__)
 
 // Forces data to be 4 bytes aligned
 #define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
@@ -41,12 +41,23 @@
 // Forces data into RTC memory.
 // Any variable marked with this attribute will keep its value
 // during a deep sleep / wake cycle.
-#define RTC_DATA_ATTR __attribute__((section(".rtc.data")))
+#define RTC_DATA_ATTR _SECTION_ATTR_IMPL(".rtc.data", __COUNTER__)
 
 // Forces read-only data into RTC memory.
-#define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
+#define RTC_RODATA_ATTR _SECTION_ATTR_IMPL(".rtc.rodata", __COUNTER__)
 
 // Forces to put some user defined data in the binary file header, the offset is 0x10.
-#define USER_DATA_ATTR __attribute__((section(".user.data")))
+#define USER_DATA_ATTR _SECTION_ATTR_IMPL(".user.data", __COUNTER__)
+
+// Implementation for a unique custom section
+//
+// This prevents gcc producing "x causes a section type conflict with y"
+// errors if two variables in the same source file have different linkage (maybe const & non-const) but are placed in the same custom section
+//
+// Using unique sections also means --gc-sections can remove unused
+// data with a custom section type set
+#define _SECTION_ATTR_IMPL(SECTION, COUNTER) __attribute__((section(SECTION "." _COUNTER_STRINGIFY(COUNTER))))
+
+#define _COUNTER_STRINGIFY(COUNTER) #COUNTER
 
 #endif /* __ESP_ATTR_H__ */

components/esp8266/ld/esp8266.common.ld

@@ -106,6 +106,8 @@ SECTIONS
     *(.init)
     *(.iram1 .iram1.*)
     *libspi_flash.a:spi_flash_raw.o(.literal .text .literal.* .text.*)
+    *libpp.a:(.literal .text .literal.* .text.*)
+    *libphy.a:(.literal .text .literal.* .text.*)
     *(.literal .text .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
     *(.fini.literal)
     *(.fini)
@@ -233,7 +235,8 @@ SECTIONS
     *(.user.data)
     *(.rodata.* .rodata .irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)
     *(.literal.* .text.*)
-  
+    *(.rodata2.* .rodata2 .literal2.* .literal2 .text2.* .text2)
+
     _irom0_text_end = ABSOLUTE(.);
   } >irom0_0_seg :irom0_0_phdr
 

components/esp8266/lib/VERSION

@@ -1,10 +1,10 @@
 gwen:
-    core:       021ebb5
-    net80211:   021ebb5
-    pp:         021ebb5
-    wpa:        021ebb5
-    espnow:     021ebb5
-    wps:        021ebb5
+    core:       38f8c34
+    net80211:   38f8c34
+    pp:         38f8c34
+    wpa:        38f8c34
+    espnow:     38f8c34
+    wps:        38f8c34
 
     smartconfig:  2.8.1
     phy:         1055_8