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#!/usr/libexec/flua
--
-- SPDX-License-Identifier: BSD-2-Clause
--
-- Copyright (c) 2024 Tyler Baxter <agge@FreeBSD.org>
-- Copyright (c) 2023 Warner Losh <imp@bsdimp.com>
-- Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
--
-- Setup to be a module, or ran as its own script.
local syscall_mk = {}
local script = not pcall(debug.getlocal, 4, 1) -- TRUE if script.
if script then
-- Add library root to the package path.
local path = arg[0]:gsub("/[^/]+.lua$", "")
package.path = package.path .. ";" .. path .. "/../?.lua"
end
local FreeBSDSyscall = require("core.freebsd-syscall")
local generator = require("tools.generator")
-- File has not been decided yet; config will decide file. Default defined as
-- /dev/null.
syscall_mk.file = "/dev/null"
-- Libc has all the STD, NOSTD and SYSMUX system calls in it, as well as
-- replaced system calls dating back to FreeBSD 7. We are lucky that the
-- system call filename is just the base symbol name for it.
function syscall_mk.generate(tbl, config, fh)
-- Grab the master system calls table.
local s = tbl.syscalls
-- Bookkeeping for keeping track of when we're at the last system
-- call (no backslash).
local size = #s
local idx = 0
-- Bind the generator to the parameter file.
local gen = generator:new({}, fh)
-- Write the generated preamble.
gen:preamble("FreeBSD system call object files.", "#")
gen:write("MIASM = \\\n") -- preamble
for _, v in pairs(s) do
local c = v:compatLevel()
local bs = " \\"
idx = idx + 1
if (v:native() or c >= 7) and not v.type.NODEF and not v.type.NOLIB then
if idx >= size then
-- At last system call, no backslash.
bs = ""
end
gen:write(string.format("\t%s.o%s\n", v:symbol(), bs))
end
end
end
-- Entry of script:
if script then
local config = require("config")
if #arg < 1 or #arg > 2 then
error("usage: " .. arg[0] .. " syscall.master")
end
local sysfile, configfile = arg[1], arg[2]
config.merge(configfile)
config.mergeCompat()
-- The parsed syscall table.
local tbl = FreeBSDSyscall:new{sysfile = sysfile, config = config}
syscall_mk.file = config.sysmk -- change file here
syscall_mk.generate(tbl, config, syscall_mk.file)
end
-- Return the module.
return syscall_mk
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