Add the rom base address to the flash address when flashing binaries.
This allows flashing binaries with the default openocd configuration.
It is an API change to IMAGE_OFFSET with binary files as it should now
only be an offset to the base address.
Force openocd type to '.bin' in case we want to flash hex/elf objects or
files not automatically recognized as bin.
This allows getting the ROM base address.
It may not be available in the build system directly so better extract it from
openocd. Also openocd is board specific and this address is cpu specific
so would have definition order issue in the build system.
When flashing with an IMAGE_OFFSET, it should also be passed to
verify_image. It is handling the base address in the image too.
This works with both elf files and binaries with the base address added.
Attempt to decouple board configuration from debugger interface
configuration by specifying the DEBUG_IFACE variable for the debug
hardware interface to use.
- Merge flash and flash-elf commands since they were identical except
for the file name of the image
- Split GDB command from DBG environment variable to allow more easily
configure front-ends for GDB via environment variables.
- Remove verbose tests of empty variables and replace by `: ${VAR:=default}`
- Remove passed command line arguments to sub-functions, they were
unused in the functions anyway.
- Remove TUI variable, use `export DBG_EXTRA_FLAGS=-tui` to get the same
result.
