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llext-edk: add support for Zstd and Zip formats

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This patch adds support for Zstd and Zip formats to the EDK generation
process. The user can now choose between XZ, Zstd, and Zip compression
and output formats for the EDK file.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
This commit is contained in:
Luca Burelli 2025-01-30 11:23:44 +01:00 • committed by Benjamin Cabé
commit c188dee334
3 changed files with 48 additions and 5 deletions
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11
CMakeLists.txt
View file

@ -2221,7 +2221,16 @@ endif()
# Extension Development Kit (EDK) generation.
if(CONFIG_LLEXT_EDK)
set(llext_edk_file ${PROJECT_BINARY_DIR}/${CONFIG_LLEXT_EDK_NAME}.tar.xz)
if(CONFIG_LLEXT_EDK_FORMAT_TAR_XZ)
set(llext_edk_extension "tar.xz")
elseif(CONFIG_LLEXT_EDK_FORMAT_TAR_ZSTD)
set(llext_edk_extension "tar.Z")
elseif(CONFIG_LLEXT_EDK_FORMAT_ZIP)
set(llext_edk_extension "zip")
else()
message(FATAL_ERROR "Unsupported LLEXT_EDK_FORMAT choice")
endif()
set(llext_edk_file ${PROJECT_BINARY_DIR}/${CONFIG_LLEXT_EDK_NAME}.${llext_edk_extension})
# TODO maybe generate flags for C CXX ASM
zephyr_get_compile_definitions_for_lang(C zephyr_defs)

13
cmake/llext-edk.cmake
View file

@ -238,12 +238,21 @@ foreach(target ${edk_targets})
edk_write_var(${target} "LLEXT_GENERATED_IMACROS_CFLAGS" "${imacros_gen}")
endforeach()
if(CONFIG_LLEXT_EDK_FORMAT_TAR_XZ)
set(llext_edk_format FORMAT gnutar COMPRESSION XZ)
elseif(CONFIG_LLEXT_EDK_FORMAT_TAR_ZSTD)
set(llext_edk_format FORMAT gnutar COMPRESSION Zstd)
elseif(CONFIG_LLEXT_EDK_FORMAT_ZIP)
set(llext_edk_format FORMAT zip)
else()
message(FATAL_ERROR "Unsupported LLEXT_EDK_FORMAT choice")
endif()
# Generate the tarball
file(ARCHIVE_CREATE
OUTPUT ${llext_edk_file}
PATHS ${llext_edk}
FORMAT gnutar
COMPRESSION XZ
${llext_edk_format}
)
file(REMOVE_RECURSE ${llext_edk})

29
subsys/llext/Kconfig
View file

@ -141,13 +141,38 @@ config LLEXT_EDK_NAME
string "Name for llext EDK (Extension Development Kit)"
default "llext-edk"
help
Name will be used when generating the EDK file, as <name>.tar.xz.
<name> will be used when generating the EDK file; the appropriate
extension will be appended depending on the chosen output format.
It will also be used, normalized, as the prefix for the variable
stating EDK location, used on generated Makefile.cflags. For
instance, the default name, "llext-edk", becomes LLEXT_EDK_INSTALL_DIR.
choice LLEXT_EDK_FORMAT
prompt "EDK compression and output format"
default LLEXT_EDK_FORMAT_TAR_XZ
config LLEXT_EDK_FORMAT_TAR_XZ
bool ".tar.xz"
help
Use GNU tar with XZ compression for the EDK file. Highest compression
ratio, slower choice.
config LLEXT_EDK_FORMAT_TAR_ZSTD
bool ".tar.Z"
help
Use GNU tar with Zstd compression for the EDK file. Way faster than
XZ, but still with a high compression ratio.
config LLEXT_EDK_FORMAT_ZIP
bool ".zip"
help
Use Zip format and compression for the EDK file. This is the most
portable option, but it may not compress as well as XZ or Zstd.
endchoice
config LLEXT_EDK_USERSPACE_ONLY
bool "Only generate the Userpace codepath on syscall stubs for the EDK"
bool "Only generate the Userspace codepath on syscall stubs for the EDK"
help
Syscall stubs can contain code that verifies if running code is at user
or kernel space and route the call accordingly. If the EDK is expected