Johny Mattsson b3e8eddf14 Sort out mapping of virtual <-> flash addresses.
The irom0_flash.bin file gets written to offset 0x40000 in flash. Said file
has the following layout

  | irom0 | text | data | rodata | chksum |

...so the previous approach of having a _flash_used_end symbol at the end of
the irom0 section no longer gives us an accurate view of how much of the flash
is used.
2016-06-24 15:40:48 +10:00
..