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makesyscalls: add override of ABI change detection

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While we can detect most ABI changes through analysis of
syscalls.master with suitable annotations, to cases are handled
in the core implementation and others have changes that can not be
infered.  Add two new config variables syscall_abi_change and
syscall_no_abi_change which override the detected value.  Both are
space-seperated lists of syscall names.

Reviewed by:	kevans
This commit is contained in:
Brooks Davis 2021-11-22 22:36:58 +00:00
parent 988e8db3c0
commit 64cc9803ab
1 changed files with 27 additions and 0 deletions
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27
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",
syscall_abi_change = "",
sys_abi_change = {},
syscall_no_abi_change = "",
sys_no_abi_change = {},
obsol = "",
obsol_dict = {},
unimpl = "",
@ -391,6 +395,18 @@ local function process_unimpl()
end
end
local function process_syscall_abi_change()
local changes_abi = config["syscall_abi_change"]
for syscall in changes_abi:gmatch("([^ ]+)") do
config["sys_abi_change"][syscall] = true
end
local no_changes = config["syscall_no_abi_change"]
for syscall in no_changes:gmatch("([^ ]+)") do
config["sys_no_abi_change"][syscall] = true
end
end
local function abi_changes(name)
if known_abi_flags[name] == nil then
abort(1, "abi_changes: unknown flag: " .. name)
@ -1197,6 +1213,9 @@ process_syscall_def = function(line)
if args ~= nil then
funcargs, changes_abi = process_args(args)
end
if config["sys_no_abi_change"][funcname] then
changes_abi = false
end
local noproto = config["abi_flags"] ~= "" and not changes_abi
local argprefix = ''
@ -1204,12 +1223,19 @@ process_syscall_def = function(line)
if abi_changes("pointer_args") then
for _, v in ipairs(funcargs) do
if isptrtype(v["type"]) then
if config["sys_no_abi_change"][funcname] then
print("WARNING: " .. funcname ..
" in syscall_no_abi_change, but pointers args are present")
end
changes_abi = true
goto ptrfound
end
end
::ptrfound::
end
if config["sys_abi_change"][funcname] then
changes_abi = true
end
if changes_abi then
-- argalias should be:
-- COMPAT_PREFIX + ABI Prefix + funcname
@ -1311,6 +1337,7 @@ elseif config["capenabled"] ~= "" then
end
process_compat()
process_abi_flags()
process_syscall_abi_change()
process_obsol()
process_unimpl()