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e7e964cb2e
exit(3) is implemented by the runtime and performs a number of shutdown actions before ultimately calling _exit(2) to terminate the program. We historically named the syscall table entry `exit` rather than `_exit`, but this requires special handling in libc/libsys to cause the `_exit` symbol to exist while implementing `exit` in libc. Declare the syscall as `_exit` and flow that through the system. Because syscall(SYS_exit, code) is fairly widely used, allow a configured extra line in syscall.h to define SYS_exit to SYS__exit. I've found no external uses of __sys_exit() so I've not bothered to create a compatability version of this private symbol. Reviewed by: imp, kib, emaste Differential Revision: https://reviews.freebsd.org/D51672
75 lines
1.9 KiB
Lua
Executable file
75 lines
1.9 KiB
Lua
Executable file
#!/usr/libexec/flua
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--
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-- SPDX-License-Identifier: BSD-2-Clause
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--
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-- Copyright (c) 2024 SRI International
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-- Copyright (c) 2024 Tyler Baxter <agge@FreeBSD.org>
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-- Copyright (c) 2023 Warner Losh <imp@bsdimp.com>
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-- Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
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--
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-- Setup to be a module, or ran as its own script.
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local syscalls_map = {}
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local script = not pcall(debug.getlocal, 4, 1) -- TRUE if script.
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if script then
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-- Add library root to the package path.
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local path = arg[0]:gsub("/[^/]+.lua$", "")
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package.path = package.path .. ";" .. path .. "/../?.lua"
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end
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local FreeBSDSyscall = require("core.freebsd-syscall")
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local generator = require("tools.generator")
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-- File has not been decided yet; config will decide file. Default defined as
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-- /dev/null.
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syscalls_map.file = "/dev/null"
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function syscalls_map.generate(tbl, config, fh)
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-- Grab the master system calls table.
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local s = tbl.syscalls
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-- Bind the generator to the parameter file.
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local gen = generator:new({}, fh)
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-- Write the generated preamble.
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gen:preamble("FreeBSD system call symbols.")
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gen:write(string.format("FBSDprivate_1.0 {\n"))
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for _, v in pairs(s) do
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gen:write(v.prolog)
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if v:native() and not v.type.NODEF and not v.type.NOLIB then
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if v.name ~= "_exit" and v.name ~= "vfork" then
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gen:write(string.format("\t_%s;\n", v.name))
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end
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gen:write(string.format("\t__sys_%s;\n", v.name))
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end
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end
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gen:write(tbl.epilog)
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-- End
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gen:write("};\n")
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end
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-- Entry of script:
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if script then
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local config = require("config")
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if #arg < 1 or #arg > 2 then
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error("usage: " .. arg[0] .. " syscall.master")
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end
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local sysfile, configfile = arg[1], arg[2]
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config.merge(configfile)
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config.mergeCompat()
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-- The parsed syscall table.
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local tbl = FreeBSDSyscall:new{sysfile = sysfile, config = config}
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syscalls_map.file = config.libsysmap -- change file here
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syscalls_map.generate(tbl, config, syscalls_map.file)
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end
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-- Return the module.
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return syscalls_map
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