Hojun-Cho
1657bdeda3
C bootstrap (phases 0-9):
cmd/wwc, cmd/6c, cmd/6a, cmd/6l, cmd/ww, rt, lib/*.
ww-side self-host (phase 10):
selfhost/cmd/wwc — ww-cgen frontend; bootstrap fixed point.
selfhost/cmd/6a — assembler; byte-identical to C 6a (test 991).
selfhost/cmd/6l — linker w/ archive (.a) support; byte-identical
to C 6l (test 992).
selfhost/cmd/ww — driver (build/run/version); byte-identical to
C ww (test 993).
make test: 15/15. make bootstrap: ww2.s == ww3.s, ww2.o == ww3.o,
ww2 == ww3 byte-identical, with the full ww-tooled chain.
49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
// net — minimal TCP. Sketched against the Linux syscall numbers
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// 41 (socket), 42 (connect), 43 (accept), 49 (bind), 50 (listen).
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// Real applications will want addrinfo + DNS; we leave that to
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// higher layers.
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@symbol("rt_syscall") fn syscall0(num: i64) i64;
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@symbol("rt_syscall") fn syscall3(num: i64, a: i64, b: i64, c: i64) i64;
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def AF_INET: i32 = 2;
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def SOCK_STREAM:i32 = 1;
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def IPPROTO_TCP:i32 = 6;
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def SYS_SOCKET: i64 = 41;
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def SYS_CONNECT: i64 = 42;
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def SYS_ACCEPT: i64 = 43;
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def SYS_BIND: i64 = 49;
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def SYS_LISTEN: i64 = 50;
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// sockaddr_in is laid out by the kernel: family u16, port u16 (BE),
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// addr u32 (BE), padding 8B = 16B total. Caller fills it.
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type sockaddr_in = struct {
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family: u16,
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port: u16,
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addr: u32,
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pad0: u64,
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};
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export fn socket() i32 = {
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return syscall3(SYS_SOCKET, AF_INET: i64, SOCK_STREAM: i64,
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IPPROTO_TCP: i64): i32;
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};
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export fn connect(fd: i32, sa: *sockaddr_in) i32 = {
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return syscall3(SYS_CONNECT, fd: i64, sa: i64, 16): i32;
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};
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export fn bind(fd: i32, sa: *sockaddr_in) i32 = {
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return syscall3(SYS_BIND, fd: i64, sa: i64, 16): i32;
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};
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export fn listen(fd: i32, backlog: i32) i32 = {
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return syscall3(SYS_LISTEN, fd: i64, backlog: i64, 0): i32;
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};
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// htons-equivalent: byte-swap a 16-bit port into network order.
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export fn htons(p: u16) u16 = {
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return ((p << 8) | (p >> 8)) & 0xffff;
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};
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