fix(wifi): Add support to move supplicant BSS to external memory

components/wpa_supplicant/CMakeLists.txt

@@ -2,6 +2,8 @@ idf_build_get_property(target IDF_TARGET)
 
 if(${target} STREQUAL "linux")
     return() # This component is not supported by the POSIX/Linux simulator
+else()
+    set(linker_fragments linker.lf)
 endif()
 
 set(srcs "port/os_xtensa.c"
@@ -217,6 +219,7 @@ idf_component_register(SRCS "${srcs}" "${esp_srcs}" "${tls_src}" "${roaming_src}
                             "${crypto_src}" "${mbo_src}" "${dpp_src}" "${wps_registrar_src}"
                     INCLUDE_DIRS include port/include esp_supplicant/include
                     PRIV_INCLUDE_DIRS src src/utils esp_supplicant/src src/crypto
+                    LDFRAGMENTS   ${linker_fragments}
                     PRIV_REQUIRES mbedtls esp_timer esp_wifi)
 
 target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-strict-aliasing -Wno-write-strings -Werror)

components/wpa_supplicant/linker.lf

@@ -0,0 +1,5 @@
+[mapping:wpa_supplicant]
+archive: libwpa_supplicant.a
+entries:
+    if ESP_ALLOW_BSS_SEG_EXTERNAL_MEMORY = y:
+        * (extram_bss)

docs/en/api-guides/external-ram.rst

@@ -106,7 +106,7 @@ Allow .bss Segment to Be Placed in External Memory
 
 Enable this option by checking :ref:`CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY`.
 
-If enabled, the region of the data virtual address space where the PSRAM is mapped to will be used to store zero-initialized data (BSS segment) from the lwIP, net80211, libpp, and bluedroid ESP-IDF libraries.
+If enabled, the region of the data virtual address space where the PSRAM is mapped to will be used to store zero-initialized data (BSS segment) from the lwIP, net80211, libpp, wpa_supplicant and bluedroid ESP-IDF libraries.
 
 Additional data can be moved from the internal BSS segment to external RAM by applying the macro ``EXT_RAM_BSS_ATTR`` to any static declaration (which is not initialized to a non-zero value).
 

docs/zh_CN/api-guides/external-ram.rst

@@ -106,7 +106,7 @@ ESP-IDF 启动过程中，片外 RAM 被映射到数据虚拟地址空间，该
 
 通过勾选 :ref:`CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY` 启用该选项。
 
-启用该选项后，PSRAM 被映射到的数据虚拟地址空间将用于存储来自 lwip、net80211、libpp 和 bluedroid ESP-IDF 库中零初始化的数据（BSS 段）。
+启用该选项后，PSRAM 被映射到的数据虚拟地址空间将用于存储来自 lwip、net80211、libpp, wpa_supplicant 和 bluedroid ESP-IDF 库中零初始化的数据（BSS 段）。
 
 通过将宏 ``EXT_RAM_BSS_ATTR`` 应用于任何静态声明（未初始化为非零值），可以将附加数据从内部 BSS 段移到片外 RAM。