fix: general bug fixes
1) prevent integer overflow if the PC is less than 0x0000_0004 2) gracefully exit when gdb gracefully exits 3) rename server to socket in Server.zig
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5947747533
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@ -3,6 +3,7 @@ const std = @import("std");
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const Allocator = std.mem.Allocator;
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const Emulator = @import("lib.zig").Emulator;
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const State = @import("State.zig");
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const Server = @import("Server.zig");
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const target = @import("Server.zig").target;
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const memory_map = @import("Server.zig").memory_map;
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@ -46,7 +47,7 @@ const String = union(enum) {
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}
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};
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pub fn parse(self: *Self, allocator: Allocator, emu: *Emulator) !String {
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pub fn parse(self: *Self, allocator: Allocator, state: *Server.State, emu: *Emulator) !String {
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switch (self.contents[0]) {
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// Required
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'?' => return .{ .static = "T05" }, // FIXME: which errno?
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@ -61,7 +62,7 @@ pub fn parse(self: *Self, allocator: Allocator, emu: *Emulator) !String {
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var i: u32 = 0;
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while (i < r.len + 1) : (i += 1) {
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var reg: u32 = if (i < r.len) r[i] else cpsr;
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if (i == 15) reg -= if (cpsr >> 5 & 1 == 1) 4 else 8; // PC is ahead
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if (i == 15) reg -|= if (cpsr >> 5 & 1 == 1) 4 else 8; // PC is ahead
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// writes the formatted integer to the buffer, returns a slice to the buffer but we ignore that
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// GDB also expects the bytes to be in the opposite order for whatever reason
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@ -191,6 +192,8 @@ pub fn parse(self: *Self, allocator: Allocator, emu: *Emulator) !String {
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// TODO: Figure out the difference between 'M' and 'X'
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'D' => {
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log.info("Disconnecting...", .{});
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state.should_quit = true;
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return .{ .static = "OK" };
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},
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'H' => return .{ .static = "" },
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@ -57,20 +57,23 @@ pub const memory_map: []const u8 =
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// FIXME: Shouldn't this be a Packet Struct?
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pkt_cache: ?[]const u8 = null,
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server: Server,
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socket: Server,
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state: State = .{},
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emu: Emulator,
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pub const State = struct { should_quit: bool = false };
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pub fn init(emulator: Emulator) !Self {
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var server = std.net.StreamServer.init(.{});
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try server.listen(std.net.Address.initIp4([_]u8{0} ** 4, port));
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return .{ .emu = emulator, .server = server };
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return .{ .emu = emulator, .socket = server };
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}
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pub fn deinit(self: *Self, allocator: Allocator) void {
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self.reset(allocator);
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self.server.deinit();
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self.socket.deinit();
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self.* = undefined;
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}
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@ -86,11 +89,13 @@ const Action = union(enum) {
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pub fn run(self: *Self, allocator: Allocator, quit: *Atomic(bool)) !void {
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var buf: [Packet.max_len]u8 = undefined;
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var client = try self.server.accept();
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var client = try self.socket.accept();
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log.info("client connected from {}", .{client.address});
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while (true) {
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const len = try client.stream.readAll(&buf);
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if (self.state.should_quit) break;
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const len = try client.stream.read(&buf);
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if (len == 0) break;
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if (quit.load(.Monotonic)) break;
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@ -127,7 +132,7 @@ fn handlePacket(self: *Self, allocator: Allocator, input: []const u8) !Action {
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var packet = Packet.from(allocator, input) catch return .nack;
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defer packet.deinit(allocator);
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var string = packet.parse(allocator, &self.emu) catch return .nack;
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var string = packet.parse(allocator, &self.state, &self.emu) catch return .nack;
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defer string.deinit(allocator);
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const reply = string.inner();
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@ -60,7 +60,7 @@ test Server {
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var server = try Server.init(iface);
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defer server.deinit(allocator);
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const t = try std.Thread.spawn(.{}, clientFn, .{server.server.listen_address});
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const t = try std.Thread.spawn(.{}, clientFn, .{server.socket.listen_address});
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defer t.join();
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var should_quit = std.atomic.Atomic(bool).init(false);
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