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makesyscalls: allow config to force OBSOL and UNIMPL

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The obsol and unimpl config variables are space-seperated lists of
syscalls that should treated as being declared OBSOL and UNIMPL.

The allows an ABI to exclude select system calls listed in
syscalls.master.

Reviewed by:	kevans
This commit is contained in:
Brooks Davis 2021-11-22 22:36:57 +00:00
parent 30bc335a05
commit 5e70931184
1 changed files with 45 additions and 8 deletions
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53
sys/tools/makesyscalls.lua
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@ -68,6 +68,10 @@ local config = {
abi_semid_t = "semid_t",
abi_ptr_array_t = "",
ptr_intptr_t_cast = "intptr_t",
obsol = "",
obsol_dict = {},
unimpl = "",
unimpl_dict = {},
}
local config_modified = {}
@ -373,6 +377,20 @@ local function process_abi_flags()
config["abi_flags_mask"] = mask
end
local function process_obsol()
local obsol = config["obsol"]
for syscall in obsol:gmatch("([^ ]+)") do
config["obsol_dict"][syscall] = true
end
end
local function process_unimpl()
local unimpl = config["unimpl"]
for syscall in unimpl:gmatch("([^ ]+)") do
config["unimpl_dict"][syscall] = true
end
end
local function abi_changes(name)
if known_abi_flags[name] == nil then
abort(1, "abi_changes: unknown flag: " .. name)
@ -1134,6 +1152,24 @@ process_syscall_def = function(line)
funcname = trim(funcname)
if config["obsol_dict"][funcname] then
local compat_prefix = ""
for _, v in pairs(compat_options) do
if flags & v["mask"] ~= 0 then
compat_prefix = v["prefix"]
goto obsol_compat_done
end
end
::obsol_compat_done::
args = nil
flags = known_flags['OBSOL']
funcomment = compat_prefix .. funcname
end
if config["unimpl_dict"][funcname] then
flags = known_flags['UNIMPL']
funcomment = funcname
end
sysflags = "0"
-- NODEF events do not get audited
@ -1192,8 +1228,13 @@ process_syscall_def = function(line)
local ncompatflags = get_mask({"STD", "NODEF", "NOARGS", "NOPROTO",
"NOSTD"})
local compatflags = get_mask_pat("COMPAT.*")
-- Now try compat...
if flags & compatflags ~= 0 then
if flags & known_flags["OBSOL"] ~= 0 then
handle_obsol(sysnum, funcname, funcomment)
elseif flags & known_flags["RESERVED"] ~= 0 then
handle_reserved(sysnum, sysstart, sysend)
elseif flags & known_flags["UNIMPL"] ~= 0 then
handle_unimpl(sysnum, sysstart, sysend, funcomment)
elseif flags & compatflags ~= 0 then
if flags & known_flags['STD'] ~= 0 then
abort(1, "Incompatible COMPAT/STD: " .. line)
end
@ -1203,12 +1244,6 @@ process_syscall_def = function(line)
handle_noncompat(sysnum, thr_flag, flags, sysflags, rettype,
auditev, syscallret, funcname, funcalias, funcargs,
argalias)
elseif flags & known_flags["OBSOL"] ~= 0 then
handle_obsol(sysnum, funcname, funcomment)
elseif flags & known_flags["RESERVED"] ~= 0 then
handle_reserved(sysnum, sysstart, sysend)
elseif flags & known_flags["UNIMPL"] ~= 0 then
handle_unimpl(sysnum, sysstart, sysend, funcomment)
else
abort(1, "Bad flags? " .. line)
end
@ -1257,6 +1292,8 @@ elseif config["capenabled"] ~= "" then
end
process_compat()
process_abi_flags()
process_obsol()
process_unimpl()
if not lfs.mkdir(tmpspace) then
error("Failed to create tempdir " .. tmpspace)