llext Struct Reference

Structure describing a linkable loadable extension. More...

#include <llext.h>

Data Fields
char	name [16]
	Name of the llext.
void *	mem [LLEXT_MEM_COUNT]
	Lookup table of memory regions.
bool	mem_on_heap [LLEXT_MEM_COUNT]
	Is the memory for this region allocated on heap?
size_t	mem_size [LLEXT_MEM_COUNT]
	Size of each stored region.
size_t	alloc_size
	Total llext allocation size.
struct llext_symtable	sym_tab
	Table of all global symbols in the extension; used internally as part of the linking process.
struct llext_symtable	exp_tab
	Table of symbols exported by the llext via LL_EXTENSION_SYMBOL.
unsigned int	use_count
	Extension use counter, prevents unloading while in use.
struct llext *	dependency [8]
	Array of extensions, whose symbols this extension accesses.

Detailed Description

Structure describing a linkable loadable extension.

This structure holds the data for a loaded extension. It is created by the llext_load function and destroyed by the llext_unload function.

Field Documentation

alloc_size

size_t llext::alloc_size

Total llext allocation size.

dependency

struct llext* llext::dependency[8]

Array of extensions, whose symbols this extension accesses.

exp_tab

struct llext_symtable llext::exp_tab

Table of symbols exported by the llext via LL_EXTENSION_SYMBOL.

This can be used in the main Zephyr binary to find symbols in the extension.

mem

void* llext::mem[LLEXT_MEM_COUNT]

Lookup table of memory regions.

mem_on_heap

bool llext::mem_on_heap[LLEXT_MEM_COUNT]

Is the memory for this region allocated on heap?

mem_size

size_t llext::mem_size[LLEXT_MEM_COUNT]

Size of each stored region.

name

char llext::name[16]

Name of the llext.

sym_tab

struct llext_symtable llext::sym_tab

Table of all global symbols in the extension; used internally as part of the linking process.

E.g. if the extension is built out of several files, if any symbols are referenced between files, this table will be used to link them.

use_count

unsigned int llext::use_count

Extension use counter, prevents unloading while in use.

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The documentation for this struct was generated from the following file:

• include/zephyr/llext/llext.h