From 9c3d7b628c0b32d7276e4dc33e2e6f306af87472 Mon Sep 17 00:00:00 2001 From: Andrew Kelley Date: Tue, 1 Mar 2016 14:11:38 -0700 Subject: rename syscall.zig to linux.zig --- std/linux.zig | 371 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 371 insertions(+) create mode 100644 std/linux.zig (limited to 'std/linux.zig') diff --git a/std/linux.zig b/std/linux.zig new file mode 100644 index 0000000000..dd5c6c61d0 --- /dev/null +++ b/std/linux.zig @@ -0,0 +1,371 @@ +const SYS_read = switch (@compile_var("arch")) { + x86_64 => 0, + i386 => 3, + else => unreachable{}, +}; +const SYS_write = switch (@compile_var("arch")) { + x86_64 => 1, + i386 => 4, + else => unreachable{}, +}; +const SYS_open = switch (@compile_var("arch")) { + x86_64 => 2, + i386 => 5, + else => unreachable{}, +}; +const SYS_close = switch (@compile_var("arch")) { + x86_64 => 3, + i386 => 6, + else => unreachable{}, +}; +const SYS_creat = switch (@compile_var("arch")) { + x86_64 => 85, + i386 => 8, + else => unreachable{}, +}; +const SYS_lseek = switch (@compile_var("arch")) { + x86_64 => 8, + i386 => 19, + else => unreachable{}, +}; +const SYS_mmap = switch (@compile_var("arch")) { + x86_64 => 9, + i386 => 90, + else => unreachable{}, +}; +const SYS_munmap = switch (@compile_var("arch")) { + x86_64 => 11, + i386 => 91, + else => unreachable{}, +}; +const SYS_rt_sigprocmask = switch (@compile_var("arch")) { + x86_64 => 14, + i386 => 175, + else => unreachable{}, +}; +const SYS_exit = switch (@compile_var("arch")) { + x86_64 => 60, + i386 => 1, + else => unreachable{}, +}; +const SYS_kill = switch (@compile_var("arch")) { + x86_64 => 62, + i386 => 37, + else => unreachable{}, +}; +const SYS_getgid = switch (@compile_var("arch")) { + x86_64 => 104, + i386 => 47, + else => unreachable{}, +}; +const SYS_gettid = switch (@compile_var("arch")) { + x86_64 => 186, + i386 => 224, + else => unreachable{}, +}; +const SYS_tkill = switch (@compile_var("arch")) { + x86_64 => 200, + i386 => 238, + else => unreachable{}, +}; +const SYS_tgkill = switch (@compile_var("arch")) { + x86_64 => 234, + i386 => 270, + else => unreachable{}, +}; +const SYS_openat = switch (@compile_var("arch")) { + x86_64 => 257, + i386 => 295, + else => unreachable{}, +}; +const SYS_getrandom = switch (@compile_var("arch")) { + x86_64 => 318, + i386 => 355, + else => unreachable{}, +}; + +pub const MMAP_PROT_NONE = 0; +pub const MMAP_PROT_READ = 1; +pub const MMAP_PROT_WRITE = 2; +pub const MMAP_PROT_EXEC = 4; + +pub const MMAP_MAP_FILE = 0; +pub const MMAP_MAP_SHARED = 1; +pub const MMAP_MAP_PRIVATE = 2; +pub const MMAP_MAP_FIXED = 16; +pub const MMAP_MAP_ANON = 32; + +pub const O_RDONLY = 0x0; +pub const O_WRONLY = 0x1; +pub const O_RDWR = 0x2; +pub const O_CREAT = 0x40; +pub const O_EXCL = 0x80; +pub const O_TRUNC = 0x200; +pub const O_APPEND = 0x400; +pub const O_SYNC = 0x101000; + +pub const SIGHUP = 1; +pub const SIGINT = 2; +pub const SIGQUIT = 3; +pub const SIGILL = 4; +pub const SIGTRAP = 5; +pub const SIGABRT = 6; +pub const SIGIOT = SIGABRT; +pub const SIGBUS = 7; +pub const SIGFPE = 8; +pub const SIGKILL = 9; +pub const SIGUSR1 = 10; +pub const SIGSEGV = 11; +pub const SIGUSR2 = 12; +pub const SIGPIPE = 13; +pub const SIGALRM = 14; +pub const SIGTERM = 15; +pub const SIGSTKFLT = 16; +pub const SIGCHLD = 17; +pub const SIGCONT = 18; +pub const SIGSTOP = 19; +pub const SIGTSTP = 20; +pub const SIGTTIN = 21; +pub const SIGTTOU = 22; +pub const SIGURG = 23; +pub const SIGXCPU = 24; +pub const SIGXFSZ = 25; +pub const SIGVTALRM = 26; +pub const SIGPROF = 27; +pub const SIGWINCH = 28; +pub const SIGIO = 29; +pub const SIGPOLL = 29; +pub const SIGPWR = 30; +pub const SIGSYS = 31; +pub const SIGUNUSED = SIGSYS; + +const SIG_BLOCK = 0; +const SIG_UNBLOCK = 1; +const SIG_SETMASK = 2; + +const syscall0 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall0, + i386 => i386_syscall0, + else => unreachable{}, +}; +const syscall1 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall1, + i386 => i386_syscall1, + else => unreachable{}, +}; +const syscall2 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall2, + i386 => i386_syscall2, + else => unreachable{}, +}; +const syscall3 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall3, + i386 => i386_syscall3, + else => unreachable{}, +}; +const syscall4 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall4, + i386 => i386_syscall4, + else => unreachable{}, +}; +const syscall6 = switch (@compile_var("arch")) { + x86_64 => x86_64_syscall6, + i386 => i386_syscall6, + else => unreachable{}, +}; + +fn x86_64_syscall0(number: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number) + : "rcx", "r11") +} + +fn x86_64_syscall1(number: isize, arg1: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number), + [arg1] "{rdi}" (arg1) + : "rcx", "r11") +} + +fn x86_64_syscall2(number: isize, arg1: isize, arg2: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number), + [arg1] "{rdi}" (arg1), + [arg2] "{rsi}" (arg2) + : "rcx", "r11") +} + +fn x86_64_syscall3(number: isize, arg1: isize, arg2: isize, arg3: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number), + [arg1] "{rdi}" (arg1), + [arg2] "{rsi}" (arg2), + [arg3] "{rdx}" (arg3) + : "rcx", "r11") +} + +fn x86_64_syscall4(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number), + [arg1] "{rdi}" (arg1), + [arg2] "{rsi}" (arg2), + [arg3] "{rdx}" (arg3), + [arg4] "{r10}" (arg4) + : "rcx", "r11") +} + +fn x86_64_syscall6(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize, arg5: isize, arg6: isize) -> isize { + asm volatile ("syscall" + : [ret] "={rax}" (-> isize) + : [number] "{rax}" (number), + [arg1] "{rdi}" (arg1), + [arg2] "{rsi}" (arg2), + [arg3] "{rdx}" (arg3), + [arg4] "{r10}" (arg4), + [arg5] "{r8}" (arg5), + [arg6] "{r9}" (arg6) + : "rcx", "r11") +} + +fn i386_syscall0(number: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number)) +} + +fn i386_syscall1(number: isize, arg1: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number), + [arg1] "{ebx}" (arg1)) +} + +fn i386_syscall2(number: isize, arg1: isize, arg2: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number), + [arg1] "{ebx}" (arg1), + [arg2] "{ecx}" (arg2)) +} + +fn i386_syscall3(number: isize, arg1: isize, arg2: isize, arg3: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number), + [arg1] "{ebx}" (arg1), + [arg2] "{ecx}" (arg2), + [arg3] "{edx}" (arg3)) +} + +fn i386_syscall4(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number), + [arg1] "{ebx}" (arg1), + [arg2] "{ecx}" (arg2), + [arg3] "{edx}" (arg3), + [arg4] "{esi}" (arg4)) +} + +fn i386_syscall6(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize, arg5: isize, arg6: isize) -> isize { + asm volatile ("int $0x80" + : [ret] "={eax}" (-> isize) + : [number] "{eax}" (number), + [arg1] "{ebx}" (arg1), + [arg2] "{ecx}" (arg2), + [arg3] "{edx}" (arg3), + [arg4] "{esi}" (arg4), + [arg5] "{edi}" (arg5), + [arg6] "{ebp}" (arg6)) +} + +pub fn mmap(address: ?&u8, length: isize, prot: isize, flags: isize, fd: isize, offset: isize) -> isize { + // TODO ability to cast maybe pointer to isize + const addr = if (const unwrapped ?= address) isize(unwrapped) else 0; + syscall6(SYS_mmap, addr, length, prot, flags, fd, offset) +} + +pub fn munmap(address: &u8, length: isize) -> isize { + syscall2(SYS_munmap, isize(address), length) +} + +pub fn read(fd: isize, buf: &u8, count: isize) -> isize { + syscall3(SYS_read, isize(fd), isize(buf), count) +} + +pub fn write(fd: isize, buf: &const u8, count: isize) -> isize { + syscall3(SYS_write, isize(fd), isize(buf), count) +} + +pub fn open(path: []u8, flags: isize, perm: isize) -> isize { + var buf: [path.len + 1]u8 = undefined; + @memcpy(&buf[0], &path[0], path.len); + buf[path.len] = 0; + syscall3(SYS_open, isize(&buf[0]), flags, perm) +} + +pub fn create(path: []u8, perm: isize) -> isize { + var buf: [path.len + 1]u8 = undefined; + @memcpy(&buf[0], &path[0], path.len); + buf[path.len] = 0; + syscall2(SYS_creat, isize(&buf[0]), perm) +} + +pub fn openat(dirfd: isize, path: []u8, flags: isize, mode: isize) -> isize { + var buf: [path.len + 1]u8 = undefined; + @memcpy(&buf[0], &path[0], path.len); + buf[path.len] = 0; + syscall4(SYS_openat, dirfd, isize(&buf[0]), flags, mode) +} + +pub fn close(fd: isize) -> isize { + syscall1(SYS_close, fd) +} + +pub fn lseek(fd: isize, offset: isize, ref_pos: isize) -> isize { + syscall3(SYS_lseek, fd, offset, ref_pos) +} + +pub fn exit(status: i32) -> unreachable { + syscall1(SYS_exit, isize(status)); + unreachable{} +} + +pub fn getrandom(buf: &u8, count: isize, flags: u32) -> isize { + syscall3(SYS_getrandom, isize(buf), count, isize(flags)) +} + +pub fn kill(pid: i32, sig: i32) -> i32 { + i32(syscall2(SYS_kill, pid, sig)) +} + +const NSIG = 65; +const sigset_t = [128]u8; +const all_mask = []u8 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; +const app_mask = []u8 { 0xff, 0xff, 0xff, 0xfc, 0x7f, 0xff, 0xff, 0xff, }; + +pub fn raise(sig: i32) -> i32 { + var set: sigset_t = undefined; + block_app_signals(&set); + const tid = i32(syscall0(SYS_gettid)); + const ret = i32(syscall2(SYS_tkill, tid, sig)); + restore_signals(&set); + return ret; +} + +fn block_all_signals(set: &sigset_t) { + syscall4(SYS_rt_sigprocmask, SIG_BLOCK, isize(&all_mask), isize(set), NSIG/8); +} + +fn block_app_signals(set: &sigset_t) { + syscall4(SYS_rt_sigprocmask, SIG_BLOCK, isize(&app_mask), isize(set), NSIG/8); +} + +fn restore_signals(set: &sigset_t) { + syscall4(SYS_rt_sigprocmask, SIG_SETMASK, isize(set), 0, NSIG/8); +} -- cgit v1.2.3