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hardened/current/master
HardenedBSD/sys/tools/syscalls
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Brooks Davis bbc0f33b13 sysent: add a NOLIB modifer to prevent stub generation 
The yield system call has long existed, but never had a stub.  Replace
the hardcoded checks for it in libsys_h.lua and syscalls_map.lua and
stop inserting it into MIASM (requiring libsys/Makefile.sys to disable
the stub).

(This seems like overkill, but I've got another case in CheriBSD so this
reduces my diff appreciably.)

Reviewed by:	emaste
Pull Request:	https://github.com/freebsd/freebsd-src/pull/1503
2024-11-01 15:44:47 +00:00
..
core sysent: add a NOLIB modifer to prevent stub generation 2024-11-01 15:44:47 +00:00
scripts sysent: add a NOLIB modifer to prevent stub generation 2024-11-01 15:44:47 +00:00
tools
config.lua
main.lua
README.md

README.md

System call creation library

Parses syscalls.master and packages information into objects with methods. Modules reproduce the previously monolithic file auto-generation.

We generally assume that this script will be run by flua, however we've carefully crafted modules for it that mimic interfaces provided by modules available in ports. Currently, this script is compatible with lua from ports along with the compatible luafilesystem and lua-posix modules.

Usage

main.lua generates all files. Files are associated with their respective modules, and modules can be run as standalone scripts to generate specific files.

Examples

All files: # /usr/libexec/flua /usr/src/sys/tools/syscalls/main.lua /usr/src/sys/kern/syscalls.master
syscalls.h: # /usr/libexec/flua /usr/src/sys/tools/syscalls/scripts/syscalls.h /usr/src/sys/kern/syscalls.master

Organization

  • root

    • main.lua - Main entry point that calls all scripts.

    • config.lua - Contains the global configuration table and associated configuration functions.

    • core (Core Classes)

      • syscall.lua - Packages each system call entry from syscalls.master into a system call object.
      • scarg.lua - Packages each argument for the system call into an argument object.
      • scret.lua - An object for the return value of the system call.
      • freebsd-syscall.lua - Contains the master system call table after processing.

    • scripts

      • init_sysent.lua - Generates init_sysent.c.
      • libsys_h.lua - Generates lib/libsys/_libsys.h.
      • syscall_h.lua - Generates syscall.h.
      • syscall_mk.lua - Generates syscall.mk.
      • syscalls.lua - Generates syscalls.c.
      • syscalls_map.lua - Generates lib/libsys/syscalls.map.
      • sysproto_h.lua - Generates sysproto.h.
      • systrace_args.lua - Generates systrace_args.c.

    • tools

      • util.lua - Contains utility functions.
      • generator.lua - Handles file generation for the library.