esp_bootloader_format: Adds bootloader description structure to read bootloader version from app

Closes https://github.com/espressif/esp-idf/issues/8800
Closes https://github.com/espressif/esp-idf/issues/9132

components/bootloader/Kconfig.projbuild

@@ -1,5 +1,7 @@
 menu "Bootloader config"
 
+    orsource "../esp_bootloader_format/Kconfig.bootloader"
+
     config BOOTLOADER_OFFSET_IN_FLASH
         hex
         default 0x1000 if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S2

components/bootloader/subproject/main/ld/esp32/bootloader.ld

@@ -109,9 +109,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } >dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data : ALIGN(0x10)
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)

components/bootloader/subproject/main/ld/esp32c2/bootloader.ld

@@ -131,9 +131,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } > dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data :
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)

components/bootloader/subproject/main/ld/esp32c3/bootloader.ld

@@ -131,9 +131,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } > dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data :
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)

components/bootloader/subproject/main/ld/esp32c6/bootloader.ld

@@ -128,9 +128,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } > dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data :
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)

components/bootloader/subproject/main/ld/esp32h2/bootloader.ld

@@ -129,6 +129,12 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } > dram_seg
 
+  .dram0.bootdesc : ALIGN(0x10)
+  {
+    _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
   .dram0.data :
   {
     _data_start = ABSOLUTE(.);

components/bootloader/subproject/main/ld/esp32s2/bootloader.ld

@@ -98,9 +98,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } >dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data :
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)

components/bootloader/subproject/main/ld/esp32s3/bootloader.ld

@@ -132,9 +132,14 @@ SECTIONS
     _bss_end = ABSOLUTE(.);
   } > dram_seg
 
-  .dram0.data :
+  .dram0.bootdesc : ALIGN(0x10)
   {
     _data_start = ABSOLUTE(.);
+    *(.data_bootloader_desc .data_bootloader_desc.*)               /* Should be the first.  Bootloader version info.        DO NOT PUT ANYTHING BEFORE IT! */
+  } > dram_seg
+
+  .dram0.data :
+  {
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)