fix(elf2image): handle PREINIT_ARRAY section type in ESP32-P4 elf file properly

ESP32-P4 ELF files can contain PREINIT_ARRAY sections that were not being
properly included in the output binary, causing applications to fail.

ESP32-P4 is unique in having a .flash.init_array section in its linker
script that collects .preinit_array input sections. Since input sections
have different types (PREINIT_ARRAY and INIT_ARRAY), PREINIT_ARRAY is
processed first but was not handled correctly by esptool, resulting in
its exclusion from the output binary.

Other ESP32 variants don't experience this issue because their .preinit_array
sections are located in .flash.rodata with PROGBITS type, which is already
properly handled.

Author: Dzarda7

esptool/bin_image.py

@@ -1286,8 +1286,14 @@ class ELFFile(object):
     SEC_TYPE_NOBITS = 0x08  # e.g. .bss section
     SEC_TYPE_INITARRAY = 0x0E
     SEC_TYPE_FINIARRAY = 0x0F
-
-    PROG_SEC_TYPES = (SEC_TYPE_PROGBITS, SEC_TYPE_INITARRAY, SEC_TYPE_FINIARRAY)
+    SEC_TYPE_PREINITARRAY = 0x10
+
+    PROG_SEC_TYPES = (
+        SEC_TYPE_PROGBITS,
+        SEC_TYPE_INITARRAY,
+        SEC_TYPE_FINIARRAY,
+        SEC_TYPE_PREINITARRAY,
+    )
 
     LEN_SEC_HEADER = 0x28