zephyr

116901 Commits

85 Branches

204 Tags

1.8 GiB

Tree: b76e68ee9f

Commit Graph

Author	SHA1	Message	Date
Luca Burelli	7094eae111	llext: support multiple string and symbol tables The ELF format allows for multiple string and symbol tables with complex references between them. This is especially evident when debugging information is included. This patch fixes the issues that have been identified with multiple string tables to allow LLEXT to properly parse those files: * The symbol table used by LLEXT (LLEXT_MEM_SYMTAB) is now chosen depending on the loaded file type, and other tables are ignored. This change is also applied to the SLID injection script. * The LLEXT string table (LLEXT_MEM_SYMTAB) is now correctly identified by the symbol table reference, instead of picking the first one. * VMA range checks only make sense for allocated sections. Signed-off-by: Luca Burelli <l.burelli@arduino.cc>	5 months ago
Mathieu Choplain	8aa6ae43ce	llext: add support for SLID-based linking This commit introduces support for an alternate linking method in the LLEXT subsystem, called "SLID" (short for Symbol Link Identifier), enabled by the CONFIG_LLEXT_EXPORT_BUILTINS_BY_SLID Kconfig option. SLID-based linking uses a unique identifier (integer) to identify exported symbols, instead of using the symbol name as done currently. This approach provides several benefits: * linking is faster because the comparison operation to determine whether we found the correct symbol in the export table is now an integer compare, instead of a string compare * binary size is reduced as symbol names can be dropped from the binary * confidentiality is improved as a side-effect, as symbol names are no longer present in the binary Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>	1 year ago

Author

SHA1

Message

Date

Luca Burelli

7094eae111

llext: support multiple string and symbol tables

The ELF format allows for multiple string and symbol tables with
complex references between them. This is especially evident when
debugging information is included.

This patch fixes the issues that have been identified with multiple
string tables to allow LLEXT to properly parse those files:

* The symbol table used by LLEXT (LLEXT_MEM_SYMTAB) is now chosen
  depending on the loaded file type, and other tables are ignored.
  This change is also applied to the SLID injection script.

* The LLEXT string table (LLEXT_MEM_SYMTAB) is now correctly identified
  by the symbol table reference, instead of picking the first one.

* VMA range checks only make sense for allocated sections.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>

5 months ago

Mathieu Choplain

8aa6ae43ce

llext: add support for SLID-based linking

This commit introduces support for an alternate linking method in the
LLEXT subsystem, called "SLID" (short for Symbol Link Identifier),
enabled by the CONFIG_LLEXT_EXPORT_BUILTINS_BY_SLID Kconfig option.

SLID-based linking uses a unique identifier (integer) to identify
exported symbols, instead of using the symbol name as done currently.
This approach provides several benefits:
 * linking is faster because the comparison operation to determine
   whether we found the correct symbol in the export table is now an
   integer compare, instead of a string compare
 * binary size is reduced as symbol names can be dropped from the binary
 * confidentiality is improved as a side-effect, as symbol names are no
   longer present in the binary

Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>

1 year ago

2 Commits (b76e68ee9fa55cb7a31a343df3563b97930563f7)