elf32.c: Extract and flash INIT_ARRAY sections

[w0xel]

In newer Versions of msp430-gcc the init_array is moved to another section .rodata2:

--- /opt/ti/msp430/gcc-7.3.2/include/msp430fr6989.ld
+++ /opt/ti/msp430/msp430-gcc-9.2.0.50_linux64/include/msp430fr6989.ld
@@ -31,7 +31,7 @@
 /* ============================================================================ */
 /* This file supports MSP430FR6989 devices. */
-/* Version: 1.207 */
+/* Version: 1.208 */
 /* Default linker script, for normal executables */
 OUTPUT_ARCH(msp430)
@@ -192,17 +192,6 @@
     *(.rodata .rodata.* .gnu.linkonce.r.* .const .const:*)
     *(.rodata1)
     KEEP (*(.gcc_except_table)) *(.gcc_except_table.*)
-    PROVIDE (__preinit_array_start = .);
-    KEEP (*(.preinit_array))
-    PROVIDE (__preinit_array_end = .);
-    PROVIDE (__init_array_start = .);
-    KEEP (*(SORT(.init_array.*)))
-    KEEP (*(.init_array))
-    PROVIDE (__init_array_end = .);
-    PROVIDE (__fini_array_start = .);
-    KEEP (*(.fini_array))
-    KEEP (*(SORT(.fini_array.*)))
-    PROVIDE (__fini_array_end = .);
   } > ROM
   /* Note: This is a separate .rodata section for sections which are
@@ -211,6 +200,20 @@
      section as read-write.  */
   .rodata2 : 
   {
+    . = ALIGN(2);
+    PROVIDE (__preinit_array_start = .);
+    KEEP (*(.preinit_array))
+    PROVIDE (__preinit_array_end = .);
+    . = ALIGN(2);
+    PROVIDE (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array))
+    PROVIDE (__init_array_end = .);
+    . = ALIGN(2);
+    PROVIDE (__fini_array_start = .);
+    KEEP (*(.fini_array))
+    KEEP (*(SORT(.fini_array.*)))
+    PROVIDE (__fini_array_end = .);
     . = ALIGN(2);
     *(.eh_frame_hdr)
     KEEP (*(.eh_frame)) 

The type of this section is INIT_ARRAY and not PROGBITS:

  [ 6] .rodata           PROGBITS        00004400 000174 0006d8 00   A  0   0  2
  [ 7] .rodata2          INIT_ARRAY      00004ad8 000850 0000c6 04  WA  0   0  2

Using mspdebug gdb and load from within gdb will also flash the init_array, as expected. Using mspdebug prog will not flash the init_array, and programs depending on that will fail.

This path will simply also extract INIT_ARRAY sections for the prog command.

[dlbeer]

Looks good -- thanks!