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https://codeberg.org/ziglang/zig.git
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Rewrite generate_linux_syscalls to be completely table based
Changes by Arnd Bergmann have migrated all supported architectures to use a table for their syscall lists. This removes the need to use the C pre-processor and simplifies the logic considerably. All currently supported architectures have been added, with the ones Zig doesn't support being commented out. Speaking of; OpenRisc has been enabled for generation.
This commit is contained in:
Stephen Gregoratto
parent
27d6614f81
commit
c5f10a3f7d
1 changed files with 197 additions and 669 deletions
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@ -2,12 +2,18 @@
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//!
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//! This tool extracts the Linux syscall numbers from the Linux source tree
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//! directly, and emits an enumerated list per supported Zig arch.
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//!
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//! As of kernel version 6.11, all supported architectures have their syscalls
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//! defined in files with the following tabular format:
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//!
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//! # Comment
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//! <number> <abi> <name> ...
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//!
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//! Everything after `name` is ignored for the purposes of this tool.
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const std = @import("std");
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const Io = std.Io;
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const mem = std.mem;
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const fmt = std.fmt;
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const zig = std.zig;
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const fs = std.fs;
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const stdlib_renames = std.StaticStringMap([]const u8).initComptime(.{
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// Remove underscore prefix.
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@ -22,702 +28,224 @@ const stdlib_renames = std.StaticStringMap([]const u8).initComptime(.{
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// ARM EABI/Thumb.
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.{ "arm_sync_file_range", "sync_file_range" },
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.{ "arm_fadvise64_64", "fadvise64_64" },
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// ARC and Hexagon.
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.{ "mmap_pgoff", "mmap2" },
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});
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// Only for newer architectures where we use the C preprocessor.
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const stdlib_renames_new = std.StaticStringMap([]const u8).initComptime(.{
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.{ "newuname", "uname" },
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.{ "umount", "umount2" },
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});
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// We use this to deal with the fact that multiple syscalls can be mapped to sys_ni_syscall.
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// Thankfully it's only 2 well-known syscalls in newer kernel ports at the moment.
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fn getOverridenNameNew(value: []const u8) ?[]const u8 {
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if (mem.eql(u8, value, "18")) {
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return "sys_lookup_dcookie";
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} else if (mem.eql(u8, value, "42")) {
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return "sys_nfsservctl";
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} else {
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return null;
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}
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/// Filter syscalls that aren't actually syscalls.
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fn isReserved(name: []const u8) bool {
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return mem.startsWith(u8, name, "available") or
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mem.startsWith(u8, name, "reserved") or
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mem.startsWith(u8, name, "unused");
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}
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fn isReservedNameOld(name: []const u8) bool {
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return std.mem.startsWith(u8, name, "available") or
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std.mem.startsWith(u8, name, "reserved") or
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std.mem.startsWith(u8, name, "unused");
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}
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const default_args: []const []const u8 = &.{
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"-E",
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// -dM is cleaner, but -dD preserves iteration order.
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"-dD",
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// No need for line-markers.
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"-P",
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"-nostdinc",
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// Using -I=[dir] includes the zig linux headers, which we don't want.
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"-Itools/include",
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"-Itools/include/uapi",
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// Output the syscall in a format we can easily recognize.
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"-D __SYSCALL(nr, nm)=zigsyscall nm nr",
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/// Values of the `abi` field in use by the syscall tables.
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///
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/// Since c. 2012, all new Linux architectures use the same numbers for their syscalls.
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/// Before kernel 6.11, the source of truth for this list was the arch-specific `uapi` headers.
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/// The 6.11 release converted this into a unified table with the same format as the older archs.
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/// For these targets, syscalls are enabled/disabled based on the `abi` field.
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/// These fields are sourced from the respective `arch/{arch}/kernel/Makefile.syscalls`
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/// files in the kernel source tree.
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/// Architecture-specific syscalls between [244...259] are also enabled by adding the arch name as an abi.
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const Abi = enum {
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/// Syscalls common to two or more sub-targets.
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/// Often used for single targets in lieu of a nil value.
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common,
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/// Syscalls using 64-bit types on 32-bit targets.
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@"32",
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/// 64-bit native syscalls.
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@"64",
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/// 32-bit time syscalls.
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time32,
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/// Supports the older renameat syscall along with renameat2.
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renameat,
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/// Supports the fstatat64 syscall.
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stat64,
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/// Supports the {get,set}rlimit syscalls.
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rlimit,
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/// Implements `memfd_secret` and friends.
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memfd_secret,
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// Architecture-specific syscalls.
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x32,
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eabi,
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nospu,
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arc,
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csky,
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nios2,
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or1k,
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riscv,
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};
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const ProcessPreprocessedFileFn = *const fn (bytes: []const u8, writer: anytype) anyerror!void;
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const ProcessTableBasedArchFileFn = *const fn (
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bytes: []const u8,
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filters: Filters,
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writer: anytype,
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optional_writer: anytype,
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) anyerror!void;
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const __X32_SYSCALL_BIT: u32 = 0x40000000;
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const __NR_Linux_O32: u32 = 4000;
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const __NR_Linux_N64: u32 = 5000;
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const __NR_Linux_N32: u32 = 6000;
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const FlowControl = enum {
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@"break",
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@"continue",
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none,
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const Arch = struct {
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/// Name for the generated enum variable.
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@"var": []const u8,
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/// Location of the table if this arch doesn't use the generic one.
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table: union(enum) { generic: void, specific: []const u8 },
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/// List of abi features to filter on.
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/// An empty list implies the abi field is a constant value, thus skipping validation.
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abi: []const Abi = &.{},
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/// Some architectures need special handling:
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/// - x32 system calls must have their number OR'ed with
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/// `__X32_SYSCALL_BIT` to distinguish them against the regular x86_64 calls.
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/// - Mips systems calls are offset by a set number based on the ABI.
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///
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/// Because the `__X32_SYSCALL_BIT` mask is so large, we can turn the OR into a
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/// normal addition and apply a base offset for all targets, defaulting to 0.
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offset: u32 = 0,
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header: ?[]const u8 = null,
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footer: ?[]const u8 = null,
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fn get(self: Arch, line: []const u8) ?struct { []const u8, u32 } {
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var iter = mem.tokenizeAny(u8, line, " \t");
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const num_str = iter.next() orelse @panic("Bad field");
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const abi = iter.next() orelse @panic("Bad field");
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const name = iter.next() orelse @panic("Bad field");
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// Filter out syscalls that aren't actually syscalls.
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if (isReserved(name)) return null;
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// Check abi field matches
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const abi_match: bool = if (self.abi.len == 0) true else blk: {
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for (self.abi) |a|
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if (mem.eql(u8, @tagName(a), abi)) break :blk true;
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break :blk false;
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};
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if (!abi_match) return null;
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var num = std.fmt.parseInt(u32, num_str, 10) catch @panic("Bad syscall number");
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num += self.offset;
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return .{ name, num };
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}
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};
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const AbiCheckParams = struct { abi: []const u8, flow: FlowControl };
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const Filters = struct {
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abiCheckParams: ?AbiCheckParams,
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fixedName: ?*const fn (name: []const u8) []const u8,
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isReservedNameOld: ?*const fn (name: []const u8) bool,
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const architectures: []const Arch = &.{
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.{ .@"var" = "X86", .table = .{ .specific = "arch/x86/entry/syscalls/syscall_32.tbl" } },
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.{ .@"var" = "X64", .table = .{ .specific = "arch/x86/entry/syscalls/syscall_64.tbl" }, .abi = &.{ .common, .@"64" } },
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.{ .@"var" = "X32", .table = .{ .specific = "arch/x86/entry/syscalls/syscall_64.tbl" }, .abi = &.{ .common, .x32 }, .offset = __X32_SYSCALL_BIT },
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.{
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.@"var" = "Arm",
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.table = .{ .specific = "arch/arm/tools/syscall.tbl" },
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.abi = &.{ .common, .eabi },
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// These values haven't been brought over from `arch/arm/include/uapi/asm/unistd.h`,
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// so we are forced to add them ourselves.
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.header = " const arm_base = 0x0f0000;\n\n",
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.footer =
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\\
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\\ breakpoint = arm_base + 1,
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\\ cacheflush = arm_base + 2,
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\\ usr26 = arm_base + 3,
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\\ usr32 = arm_base + 4,
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\\ set_tls = arm_base + 5,
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\\ get_tls = arm_base + 6,
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\\
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,
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},
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.{ .@"var" = "Sparc", .table = .{ .specific = "arch/sparc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"32" } },
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.{ .@"var" = "Sparc64", .table = .{ .specific = "arch/sparc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64" } },
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.{ .@"var" = "M68k", .table = .{ .specific = "arch/m68k/kernel/syscalls/syscall.tbl" } },
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// For Mips, the abi for these tables is always o32/n64/n32.
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.{ .@"var" = "MipsO32", .table = .{ .specific = "arch/mips/kernel/syscalls/syscall_o32.tbl" }, .offset = __NR_Linux_O32 },
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.{ .@"var" = "MipsN64", .table = .{ .specific = "arch/mips/kernel/syscalls/syscall_n64.tbl" }, .offset = __NR_Linux_N64 },
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.{ .@"var" = "MipsN32", .table = .{ .specific = "arch/mips/kernel/syscalls/syscall_n32.tbl" }, .offset = __NR_Linux_N32 },
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.{ .@"var" = "PowerPC", .table = .{ .specific = "arch/powerpc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"32", .nospu } },
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.{ .@"var" = "PowerPC64", .table = .{ .specific = "arch/powerpc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64", .nospu } },
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.{ .@"var" = "S390x", .table = .{ .specific = "arch/s390/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64" } },
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.{ .@"var" = "Xtensa", .table = .{ .specific = "arch/xtensa/kernel/syscalls/syscall.tbl" } },
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.{ .@"var" = "Arm64", .table = .generic, .abi = &.{ .common, .@"64", .renameat, .rlimit, .memfd_secret } },
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.{ .@"var" = "RiscV32", .table = .generic, .abi = &.{ .common, .@"32", .riscv, .memfd_secret } },
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.{ .@"var" = "RiscV64", .table = .generic, .abi = &.{ .common, .@"64", .riscv, .rlimit, .memfd_secret } },
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.{ .@"var" = "LoongArch64", .table = .generic, .abi = &.{ .common, .@"64" } },
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.{ .@"var" = "Arc", .table = .generic, .abi = &.{ .common, .@"32", .arc, .time32, .renameat, .stat64, .rlimit } },
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.{ .@"var" = "CSky", .table = .generic, .abi = &.{ .common, .@"32", .csky, .time32, .stat64, .rlimit } },
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.{ .@"var" = "Hexagon", .table = .generic, .abi = &.{ .common, .@"32", .time32, .stat64, .rlimit, .renameat } },
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.{ .@"var" = "OpenRisc", .table = .generic, .abi = &.{ .common, .@"32", .or1k, .time32, .stat64, .rlimit, .renameat } },
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// .{ .@"var" = "Nios2", .table = .generic, .abi = &.{ .common, .@"32", .nios2, .time32, .stat64, .rlimit, .renameat } },
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// .{ .@"var" = "Parisc", .table = .{ .specific = "arch/parisc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"32" } },
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// .{ .@"var" = "Parisc64", .table = .{ .specific = "arch/parisc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64" } },
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// .{ .@"var" = "Sh", .table = .{ .specific = "arch/sh/kernel/syscalls/syscall.tbl" } },
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// .{ .@"var" = "Microblaze", .table = .{ .specific = "arch/microblaze/kernel/syscalls/syscall.tbl" } },
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};
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fn abiCheck(abi: []const u8, params: *const AbiCheckParams) FlowControl {
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if (mem.eql(u8, abi, params.abi)) return params.flow;
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return .none;
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}
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fn fixedName(name: []const u8) []const u8 {
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return if (stdlib_renames.get(name)) |fixed| fixed else name;
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}
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const ArchInfo = union(enum) {
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table: struct {
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name: []const u8,
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enum_name: []const u8,
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file_path: []const u8,
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header: ?[]const u8,
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extra_values: ?[]const u8,
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process_file: ProcessTableBasedArchFileFn,
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filters: Filters,
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additional_enum: ?[]const u8,
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},
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preprocessor: struct {
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name: []const u8,
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enum_name: []const u8,
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file_path: []const u8,
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child_options: struct {
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comptime additional_args: ?[]const []const u8 = null,
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target: []const u8,
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pub inline fn getArgs(self: *const @This(), zig_exe: []const u8, file_path: []const u8) []const []const u8 {
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const additional_args: []const []const u8 = self.additional_args orelse &.{};
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return .{ zig_exe, "cc" } ++ additional_args ++ .{ "-target", self.target } ++ default_args ++ .{file_path};
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}
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},
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header: ?[]const u8,
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extra_values: ?[]const u8,
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process_file: ProcessPreprocessedFileFn,
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additional_enum: ?[]const u8,
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},
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};
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const arch_infos = [_]ArchInfo{
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.{
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// These architectures have their syscall definitions generated from a TSV
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// file, processed via scripts/syscallhdr.sh.
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.table = .{
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.name = "x86",
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.enum_name = "X86",
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.file_path = "arch/x86/entry/syscalls/syscall_32.tbl",
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.process_file = &processTableBasedArch,
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.filters = .{
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.abiCheckParams = null,
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.fixedName = &fixedName,
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.isReservedNameOld = null,
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},
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.header = null,
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.extra_values = null,
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.additional_enum = null,
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},
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},
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.{
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.table = .{
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.name = "x64",
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.enum_name = "X64",
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.file_path = "arch/x86/entry/syscalls/syscall_64.tbl",
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.process_file = &processTableBasedArch,
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.filters = .{
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// The x32 abi syscalls are always at the end.
|
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.abiCheckParams = .{ .abi = "x32", .flow = .@"break" },
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.fixedName = &fixedName,
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.isReservedNameOld = null,
|
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},
|
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.header = null,
|
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.extra_values = null,
|
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.additional_enum = null,
|
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},
|
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},
|
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.{
|
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.table = .{
|
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.name = "x32",
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.enum_name = "X32",
|
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.file_path = "arch/x86/entry/syscalls/syscall_64.tbl",
|
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.process_file = &processTableBasedArch,
|
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.filters = .{
|
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.abiCheckParams = .{ .abi = "64", .flow = .@"continue" },
|
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.fixedName = &fixedName,
|
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.isReservedNameOld = null,
|
||||
},
|
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.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
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.{
|
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.table = .{
|
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.name = "arm",
|
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.enum_name = "Arm",
|
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.file_path = "arch/arm/tools/syscall.tbl",
|
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.process_file = &processTableBasedArch,
|
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.filters = .{
|
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.abiCheckParams = .{ .abi = "oabi", .flow = .@"continue" },
|
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.fixedName = &fixedName,
|
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.isReservedNameOld = null,
|
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},
|
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.header = " const arm_base = 0x0f0000;\n\n",
|
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// TODO: maybe extract these from arch/arm/include/uapi/asm/unistd.h
|
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.extra_values =
|
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\\
|
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\\ breakpoint = arm_base + 1,
|
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\\ cacheflush = arm_base + 2,
|
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\\ usr26 = arm_base + 3,
|
||||
\\ usr32 = arm_base + 4,
|
||||
\\ set_tls = arm_base + 5,
|
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\\ get_tls = arm_base + 6,
|
||||
\\
|
||||
,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "sparc",
|
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.enum_name = "Sparc",
|
||||
.file_path = "arch/sparc/kernel/syscalls/syscall.tbl",
|
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.process_file = &processTableBasedArch,
|
||||
.filters = .{
|
||||
.abiCheckParams = .{ .abi = "64", .flow = .@"continue" },
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = null,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
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.{
|
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.table = .{
|
||||
.name = "sparc64",
|
||||
.enum_name = "Sparc64",
|
||||
.file_path = "arch/sparc/kernel/syscalls/syscall.tbl",
|
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.process_file = &processTableBasedArch,
|
||||
.filters = .{
|
||||
.abiCheckParams = .{ .abi = "32", .flow = .@"continue" },
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = null,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
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.table = .{
|
||||
.name = "m68k",
|
||||
.enum_name = "M68k",
|
||||
.file_path = "arch/m68k/kernel/syscalls/syscall.tbl",
|
||||
.process_file = &processTableBasedArch,
|
||||
.filters = .{
|
||||
// abi is always common
|
||||
.abiCheckParams = null,
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = null,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
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.{
|
||||
.table = .{
|
||||
.name = "mips_o32",
|
||||
.enum_name = "MipsO32",
|
||||
.file_path = "arch/mips/kernel/syscalls/syscall_o32.tbl",
|
||||
.process_file = &processMipsBasedArch,
|
||||
.filters = .{
|
||||
// abi is always o32
|
||||
.abiCheckParams = null,
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = &isReservedNameOld,
|
||||
},
|
||||
.header = " const linux_base = 4000;\n\n",
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "mips_n64",
|
||||
.enum_name = "MipsN64",
|
||||
.file_path = "arch/mips/kernel/syscalls/syscall_n64.tbl",
|
||||
.process_file = &processMipsBasedArch,
|
||||
.filters = .{
|
||||
// abi is always n64
|
||||
.abiCheckParams = null,
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = &isReservedNameOld,
|
||||
},
|
||||
.header = " const linux_base = 5000;\n\n",
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "mips_n32",
|
||||
.enum_name = "MipsN32",
|
||||
.file_path = "arch/mips/kernel/syscalls/syscall_n32.tbl",
|
||||
.process_file = &processMipsBasedArch,
|
||||
.filters = .{
|
||||
// abi is always n32
|
||||
.abiCheckParams = null,
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = &isReservedNameOld,
|
||||
},
|
||||
.header = " const linux_base = 6000;\n\n",
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "powerpc",
|
||||
.enum_name = "PowerPC",
|
||||
.file_path = "arch/powerpc/kernel/syscalls/syscall.tbl",
|
||||
.process_file = &processPowerPcBasedArch,
|
||||
.filters = .{
|
||||
.abiCheckParams = null,
|
||||
.fixedName = null,
|
||||
.isReservedNameOld = null,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = "PowerPC64",
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "s390x",
|
||||
.enum_name = "S390x",
|
||||
.file_path = "arch/s390/kernel/syscalls/syscall.tbl",
|
||||
.process_file = &processTableBasedArch,
|
||||
.filters = .{
|
||||
// 32-bit s390 support in linux is deprecated
|
||||
.abiCheckParams = .{ .abi = "32", .flow = .@"continue" },
|
||||
.fixedName = &fixedName,
|
||||
.isReservedNameOld = null,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.table = .{
|
||||
.name = "xtensa",
|
||||
.enum_name = "Xtensa",
|
||||
.file_path = "arch/xtensa/kernel/syscalls/syscall.tbl",
|
||||
.process_file = &processTableBasedArch,
|
||||
.filters = .{
|
||||
// abi is always common
|
||||
.abiCheckParams = null,
|
||||
.fixedName = fixedName,
|
||||
.isReservedNameOld = &isReservedNameOld,
|
||||
},
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "arm64",
|
||||
.enum_name = "Arm64",
|
||||
.file_path = "arch/arm64/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "aarch64-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "riscv32",
|
||||
.enum_name = "RiscV32",
|
||||
.file_path = "arch/riscv/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "riscv32-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "riscv64",
|
||||
.enum_name = "RiscV64",
|
||||
.file_path = "arch/riscv/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "riscv64-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "loongarch",
|
||||
.enum_name = "LoongArch64",
|
||||
.file_path = "arch/loongarch/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "loongarch64-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "arc",
|
||||
.enum_name = "Arc",
|
||||
.file_path = "arch/arc/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "arc-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "csky",
|
||||
.enum_name = "CSky",
|
||||
.file_path = "arch/csky/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "csky-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
.{
|
||||
.preprocessor = .{
|
||||
.name = "hexagon",
|
||||
.enum_name = "Hexagon",
|
||||
.file_path = "arch/hexagon/include/uapi/asm/unistd.h",
|
||||
.child_options = .{
|
||||
.additional_args = null,
|
||||
.target = "hexagon-freestanding-none",
|
||||
},
|
||||
.process_file = &processPreprocessedFile,
|
||||
.header = null,
|
||||
.extra_values = null,
|
||||
.additional_enum = null,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
fn processPreprocessedFile(
|
||||
bytes: []const u8,
|
||||
writer: anytype,
|
||||
) !void {
|
||||
var lines = mem.tokenizeScalar(u8, bytes, '\n');
|
||||
while (lines.next()) |line| {
|
||||
var fields = mem.tokenizeAny(u8, line, " ");
|
||||
const prefix = fields.next() orelse return error.Incomplete;
|
||||
|
||||
if (!mem.eql(u8, prefix, "zigsyscall")) continue;
|
||||
|
||||
const sys_name = fields.next() orelse return error.Incomplete;
|
||||
const value = fields.rest();
|
||||
const name = (getOverridenNameNew(value) orelse sys_name)["sys_".len..];
|
||||
const fixed_name = if (stdlib_renames_new.get(name)) |f| f else if (stdlib_renames.get(name)) |f| f else name;
|
||||
|
||||
try writer.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), value });
|
||||
}
|
||||
}
|
||||
|
||||
fn processTableBasedArch(
|
||||
bytes: []const u8,
|
||||
filters: Filters,
|
||||
writer: anytype,
|
||||
optional_writer: anytype,
|
||||
) !void {
|
||||
_ = optional_writer;
|
||||
|
||||
var lines = mem.tokenizeScalar(u8, bytes, '\n');
|
||||
while (lines.next()) |line| {
|
||||
if (line[0] == '#') continue;
|
||||
|
||||
var fields = mem.tokenizeAny(u8, line, " \t");
|
||||
const number = fields.next() orelse return error.Incomplete;
|
||||
|
||||
const abi = fields.next() orelse return error.Incomplete;
|
||||
if (filters.abiCheckParams) |*params| {
|
||||
switch (abiCheck(abi, params)) {
|
||||
.none => {},
|
||||
.@"break" => break,
|
||||
.@"continue" => continue,
|
||||
}
|
||||
}
|
||||
const name = fields.next() orelse return error.Incomplete;
|
||||
if (filters.isReservedNameOld) |isReservedNameOldFn| {
|
||||
if (isReservedNameOldFn(name)) continue;
|
||||
}
|
||||
const fixed_name = if (filters.fixedName) |fixedNameFn| fixedNameFn(name) else name;
|
||||
|
||||
try writer.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
}
|
||||
}
|
||||
|
||||
fn processMipsBasedArch(
|
||||
bytes: []const u8,
|
||||
filters: Filters,
|
||||
writer: anytype,
|
||||
optional_writer: anytype,
|
||||
) !void {
|
||||
_ = optional_writer;
|
||||
|
||||
var lines = mem.tokenizeScalar(u8, bytes, '\n');
|
||||
while (lines.next()) |line| {
|
||||
if (line[0] == '#') continue;
|
||||
|
||||
var fields = mem.tokenizeAny(u8, line, " \t");
|
||||
const number = fields.next() orelse return error.Incomplete;
|
||||
|
||||
const abi = fields.next() orelse return error.Incomplete;
|
||||
if (filters.abiCheckParams) |*params| {
|
||||
switch (abiCheck(abi, params)) {
|
||||
.none => {},
|
||||
.@"break" => break,
|
||||
.@"continue" => continue,
|
||||
}
|
||||
}
|
||||
const name = fields.next() orelse return error.Incomplete;
|
||||
if (filters.isReservedNameOld) |isReservedNameOldFn| {
|
||||
if (isReservedNameOldFn(name)) continue;
|
||||
}
|
||||
const fixed_name = if (filters.fixedName) |fixedNameFn| fixedNameFn(name) else name;
|
||||
|
||||
try writer.print(" {f} = linux_base + {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
}
|
||||
}
|
||||
|
||||
fn processPowerPcBasedArch(
|
||||
bytes: []const u8,
|
||||
filters: Filters,
|
||||
writer: anytype,
|
||||
optional_writer: anytype,
|
||||
) !void {
|
||||
_ = filters;
|
||||
var lines = mem.tokenizeScalar(u8, bytes, '\n');
|
||||
|
||||
while (lines.next()) |line| {
|
||||
if (line[0] == '#') continue;
|
||||
|
||||
var fields = mem.tokenizeAny(u8, line, " \t");
|
||||
const number = fields.next() orelse return error.Incomplete;
|
||||
const abi = fields.next() orelse return error.Incomplete;
|
||||
const name = fields.next() orelse return error.Incomplete;
|
||||
const fixed_name = if (stdlib_renames.get(name)) |fixed| fixed else name;
|
||||
|
||||
if (mem.eql(u8, abi, "spu")) {
|
||||
continue;
|
||||
} else if (mem.eql(u8, abi, "32")) {
|
||||
try writer.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
} else if (mem.eql(u8, abi, "64")) {
|
||||
try optional_writer.?.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
} else { // common/nospu
|
||||
try writer.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
try optional_writer.?.print(" {f} = {s},\n", .{ zig.fmtId(fixed_name), number });
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn generateSyscallsFromTable(
|
||||
allocator: std.mem.Allocator,
|
||||
buf: []u8,
|
||||
linux_dir: std.fs.Dir,
|
||||
writer: anytype,
|
||||
_arch_info: *const ArchInfo,
|
||||
) !void {
|
||||
std.debug.assert(_arch_info.* == .table);
|
||||
|
||||
const arch_info = _arch_info.table;
|
||||
|
||||
const table = try linux_dir.readFile(arch_info.file_path, buf);
|
||||
|
||||
var optional_array_list: ?std.array_list.Managed(u8) = if (arch_info.additional_enum) |_| std.array_list.Managed(u8).init(allocator) else null;
|
||||
const optional_writer = if (optional_array_list) |_| optional_array_list.?.writer() else null;
|
||||
|
||||
try writer.print("pub const {s} = enum(usize) {{\n", .{arch_info.enum_name});
|
||||
|
||||
if (arch_info.header) |header| {
|
||||
try writer.writeAll(header);
|
||||
}
|
||||
|
||||
try arch_info.process_file(table, arch_info.filters, writer, optional_writer);
|
||||
|
||||
if (arch_info.extra_values) |extra_values| {
|
||||
try writer.writeAll(extra_values);
|
||||
}
|
||||
try writer.writeAll("};");
|
||||
|
||||
if (arch_info.additional_enum) |additional_enum| {
|
||||
try writer.writeAll("\n\n");
|
||||
try writer.print("pub const {s} = enum(usize) {{\n", .{additional_enum});
|
||||
try writer.writeAll(optional_array_list.?.items);
|
||||
try writer.writeAll("};");
|
||||
}
|
||||
}
|
||||
|
||||
fn generateSyscallsFromPreprocessor(
|
||||
allocator: std.mem.Allocator,
|
||||
linux_dir: std.fs.Dir,
|
||||
linux_path: []const u8,
|
||||
zig_exe: []const u8,
|
||||
writer: anytype,
|
||||
_arch_info: *const ArchInfo,
|
||||
) !void {
|
||||
std.debug.assert(_arch_info.* == .preprocessor);
|
||||
|
||||
const arch_info = _arch_info.preprocessor;
|
||||
|
||||
const child_result = try std.process.Child.run(.{
|
||||
.allocator = allocator,
|
||||
.argv = arch_info.child_options.getArgs(zig_exe, arch_info.file_path),
|
||||
.cwd = linux_path,
|
||||
.cwd_dir = linux_dir,
|
||||
});
|
||||
if (child_result.stderr.len > 0) std.debug.print("{s}\n", .{child_result.stderr});
|
||||
|
||||
const defines = switch (child_result.term) {
|
||||
.Exited => |code| if (code == 0) child_result.stdout else {
|
||||
std.debug.print("zig cc exited with code {d}\n", .{code});
|
||||
std.process.exit(1);
|
||||
},
|
||||
else => {
|
||||
std.debug.print("zig cc crashed\n", .{});
|
||||
std.process.exit(1);
|
||||
},
|
||||
};
|
||||
|
||||
try writer.print("pub const {s} = enum(usize) {{\n", .{arch_info.enum_name});
|
||||
if (arch_info.header) |header| {
|
||||
try writer.writeAll(header);
|
||||
}
|
||||
|
||||
try arch_info.process_file(defines, writer);
|
||||
|
||||
if (arch_info.extra_values) |extra_values| {
|
||||
try writer.writeAll(extra_values);
|
||||
}
|
||||
|
||||
try writer.writeAll("};");
|
||||
}
|
||||
|
||||
pub fn main() !void {
|
||||
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
|
||||
defer arena.deinit();
|
||||
const allocator = arena.allocator();
|
||||
const gpa = arena.allocator();
|
||||
|
||||
const args = try std.process.argsAlloc(allocator);
|
||||
if (args.len < 3 or mem.eql(u8, args[1], "--help")) {
|
||||
const args = try std.process.argsAlloc(gpa);
|
||||
if (args.len < 2 or mem.eql(u8, args[1], "--help")) {
|
||||
usage(std.debug.lockStderrWriter(&.{}), args[0]) catch std.process.exit(2);
|
||||
std.process.exit(1);
|
||||
}
|
||||
const zig_exe = args[1];
|
||||
const linux_path = args[2];
|
||||
const linux_path = args[1];
|
||||
|
||||
var stdout_buffer: [2000]u8 = undefined;
|
||||
var stdout_buffer: [2048]u8 = undefined;
|
||||
var stdout_writer = std.fs.File.stdout().writerStreaming(&stdout_buffer);
|
||||
const writer = &stdout_writer.interface;
|
||||
const stdout = &stdout_writer.interface;
|
||||
|
||||
var linux_dir = try std.fs.cwd().openDir(linux_path, .{});
|
||||
defer linux_dir.close();
|
||||
|
||||
try writer.writeAll(
|
||||
\\// This file is automatically generated.
|
||||
\\// See tools/generate_linux_syscalls.zig for more info.
|
||||
\\
|
||||
\\
|
||||
);
|
||||
|
||||
// As of 5.17.1, the largest table is 23467 bytes.
|
||||
// As of 6.11, the largest table is 24195 bytes.
|
||||
// 32k should be enough for now.
|
||||
const buf = try allocator.alloc(u8, 1 << 15);
|
||||
defer allocator.free(buf);
|
||||
const buf = try gpa.alloc(u8, 1 << 15);
|
||||
defer gpa.free(buf);
|
||||
|
||||
inline for (arch_infos, 0..) |arch_info, i| {
|
||||
switch (arch_info) {
|
||||
.table => try generateSyscallsFromTable(
|
||||
allocator,
|
||||
buf,
|
||||
linux_dir,
|
||||
writer,
|
||||
&arch_info,
|
||||
),
|
||||
.preprocessor => try generateSyscallsFromPreprocessor(
|
||||
allocator,
|
||||
linux_dir,
|
||||
linux_path,
|
||||
zig_exe,
|
||||
writer,
|
||||
&arch_info,
|
||||
),
|
||||
// Fetch the kernel version from the Makefile variables.
|
||||
const version = blk: {
|
||||
const head = try linux_dir.readFile("Makefile", buf[0..128]);
|
||||
var lines = mem.tokenizeScalar(u8, head, '\n');
|
||||
_ = lines.next(); // Skip SPDX identifier
|
||||
|
||||
var ver = mem.zeroes(std.SemanticVersion);
|
||||
inline for (.{ "major", "minor", "patch" }, .{ "VERSION", "PATCHLEVEL", "SUBLEVEL" }) |field, make_var| {
|
||||
const line = lines.next() orelse @panic("Bad line");
|
||||
const offset = (make_var ++ " = ").len;
|
||||
@field(ver, field) = try std.fmt.parseInt(usize, line[offset..], 10);
|
||||
}
|
||||
if (i < arch_infos.len - 1) {
|
||||
try writer.writeAll("\n\n");
|
||||
} else {
|
||||
try writer.writeAll("\n");
|
||||
|
||||
break :blk ver;
|
||||
};
|
||||
|
||||
try Io.Writer.print(stdout,
|
||||
\\// This file is automatically generated, DO NOT edit it manually.
|
||||
\\// See tools/generate_linux_syscalls.zig for more info.
|
||||
\\// This list current as of kernel: {f}
|
||||
\\
|
||||
\\
|
||||
, .{version});
|
||||
|
||||
for (architectures, 0..) |arch, i| {
|
||||
const table = try linux_dir.readFile(switch (arch.table) {
|
||||
.generic => "scripts/syscall.tbl",
|
||||
.specific => |f| f,
|
||||
}, buf);
|
||||
|
||||
try Io.Writer.print(stdout, "pub const {s} = enum(usize) {{\n", .{arch.@"var"});
|
||||
if (arch.header) |h|
|
||||
try Io.Writer.writeAll(stdout, h);
|
||||
|
||||
var lines = mem.tokenizeScalar(u8, table, '\n');
|
||||
while (lines.next()) |line| {
|
||||
if (line[0] == '#') continue;
|
||||
if (arch.get(line)) |res| {
|
||||
const name, const num = res;
|
||||
const final_name = stdlib_renames.get(name) orelse name;
|
||||
try Io.Writer.print(stdout, " {f} = {d},\n", .{ std.zig.fmtId(final_name), num });
|
||||
}
|
||||
}
|
||||
|
||||
if (arch.footer) |f|
|
||||
try Io.Writer.writeAll(stdout, f);
|
||||
try Io.Writer.writeAll(stdout, "};\n");
|
||||
if (i != architectures.len - 1)
|
||||
try Io.Writer.writeByte(stdout, '\n');
|
||||
}
|
||||
|
||||
try writer.flush();
|
||||
try Io.Writer.flush(stdout);
|
||||
}
|
||||
|
||||
fn usage(w: *std.io.Writer, arg0: []const u8) std.io.Writer.Error!void {
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue