#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

config BINFMT_DISABLE
	bool "Disable BINFMT support"
	default DEFAULT_SMALL
	---help---
		By default, support for loadable binary formats is built.  This logic
		may be suppressed by defining this setting.

if !BINFMT_DISABLE

config PATH_INITIAL
	string "Initial PATH Value"
	default ""
	depends on LIBC_ENVPATH
	---help---
		The initial value of the PATH variable.  This is the colon-separated
		list of absolute paths.  E.g., "/bin:/usr/bin:/sbin"

config BINFMT_LOADABLE
	bool
	select MODULES
	default n
	---help---
		Automatically selected if a loadable binary format is selected.

config PIC
	bool "Executable elf position-independent support"
	default n
	---help---
		Automatically selected if the binary format requires position
		independent operation.

config NXFLAT
	bool "Enable the NXFLAT Binary Format"
	default n
	select BINFMT_LOADABLE
	select PIC
	---help---
		Enable support for the NXFLAT binary format.  Default: n

if NXFLAT
source "binfmt/libnxflat/Kconfig"
endif

config ELF
	bool "Enable the ELF Binary Format"
	default n
	select BINFMT_LOADABLE
	select LIBC_ELF
	---help---
		Enable support for the ELF binary format.  Default: n

if ELF
config ELF_STACKSIZE
	int "ELF Stack Size"
	default DEFAULT_TASK_STACKSIZE
	---help---
		This is the default stack size that will be used when starting ELF binaries.

config FDPIC
	bool "FDPIC modules"
	default n
	select PIC
	depends on ARCH_HAVE_ELF_FDPIC
	---help---
		Load ELF modules built for the FDPIC ABI.

		An FDPIC module places its read-only and writable segments
		independently, so its text can be executed directly out of flash
		while only the writable segment is copied to RAM, once per running
		instance.  A filesystem that can show its media, such as XIPFS or
		ROMFS, gives that result.  On any other filesystem the loader copies
		the text to RAM, and the module runs but shares nothing.

		Building a module needs an arm-uclinuxfdpiceabi linker.  The stock
		arm-none-eabi compiler emits correct FDPIC objects for both C and
		C++, so only the link needs it.

		What this adds over the position independent ELF support already
		present is a function pointer that carries its own data base, as a
		two word descriptor rather than a bare code address.  That is what
		lets a module be called back on a thread it did not create, such as
		the work queue worker that runs a SIGEV_THREAD notification.

		Selecting this makes ten libc and sched entry points that can
		accept a callback from a module resolve such a descriptor before
		storing or branching to it.  Each costs a register read and a
		branch on a path that is not hot.

		This implementation covers ARM Thumb-2.
endif
endif

config BINFMT_CONSTRUCTORS
	bool "C++ Static Constructor Support"
	default n
	depends on HAVE_CXX && ELF
	---help---
		Built-in support for C++ constructors in loaded modules.  Currently
		only support for ELF binary formats.

choice
	prompt "File output format"
	default BINFMT_ELF_RELOCATABLE
	---help---
		Defines the type of ELF file produced by the NuttX build system.

config BINFMT_ELF_RELOCATABLE
	bool "Relocatable ELF"
	---help---
		Produce a relocatable object as output. This is also known as partial linking.

config BINFMT_ELF_EXECUTABLE
	bool "Executable ELF"
	depends on ARCH_HAVE_ELF_EXECUTABLE
	---help---
		Produce a full linked executable object as output.

endchoice

config BINFMT_STORE_FILENAME
	bool "Store the binary filename"
	default n
	---help---
		Store the filename of the loaded binary