diff --git a/CMakeLists.txt b/CMakeLists.txt index c3ee37ea89cc..7756c984db7a 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -574,6 +574,7 @@ set(ZIG_STD_FILES "os/linux/index.zig" "os/linux/vdso.zig" "os/linux/x86_64.zig" + "os/linux/arm64.zig" "os/path.zig" "os/time.zig" "os/windows/advapi32.zig" diff --git a/src-self-hosted/libc_installation.zig b/src-self-hosted/libc_installation.zig index 5e292ff8b2ee..5a888e4c9f23 100644 --- a/src-self-hosted/libc_installation.zig +++ b/src-self-hosted/libc_installation.zig @@ -280,7 +280,7 @@ pub const LibCInstallation = struct { switch (builtin.arch) { builtin.Arch.i386 => try stream.write("x86"), builtin.Arch.x86_64 => try stream.write("x64"), - builtin.Arch.aarch64 => try stream.write("arm"), + builtin.Arch.aarch64v8 => try stream.write("arm"), else => return error.UnsupportedArchitecture, } const ucrt_lib_path = try std.os.path.join(loop.allocator, result_buf.toSliceConst(), "ucrt.lib"); @@ -355,7 +355,7 @@ pub const LibCInstallation = struct { switch (builtin.arch) { builtin.Arch.i386 => try stream.write("x86\\"), builtin.Arch.x86_64 => try stream.write("x64\\"), - builtin.Arch.aarch64 => try stream.write("arm\\"), + builtin.Arch.aarch64v8 => try stream.write("arm\\"), else => return error.UnsupportedArchitecture, } const kernel32_path = try std.os.path.join(loop.allocator, result_buf.toSliceConst(), "kernel32.lib"); diff --git a/src-self-hosted/link.zig b/src-self-hosted/link.zig index 90f08b730502..1b32533ebcfe 100644 --- a/src-self-hosted/link.zig +++ b/src-self-hosted/link.zig @@ -330,7 +330,7 @@ fn constructLinkerArgsCoff(ctx: *Context) !void { switch (ctx.comp.target.getArch()) { builtin.Arch.i386 => try ctx.args.append(c"-MACHINE:X86"), builtin.Arch.x86_64 => try ctx.args.append(c"-MACHINE:X64"), - builtin.Arch.aarch64 => try ctx.args.append(c"-MACHINE:ARM"), + builtin.Arch.aarch64v8 => try ctx.args.append(c"-MACHINE:ARM"), else => return error.UnsupportedLinkArchitecture, } @@ -556,7 +556,7 @@ fn constructLinkerArgsMachO(ctx: *Context) !void { } }, DarwinPlatform.Kind.IPhoneOS => { - if (ctx.comp.target.getArch() == builtin.Arch.aarch64) { + if (ctx.comp.target.getArch() == builtin.Arch.aarch64v8) { // iOS does not need any crt1 files for arm64 } else if (platform.versionLessThan(3, 1)) { try ctx.args.append(c"-lcrt1.o"); diff --git a/src-self-hosted/target.zig b/src-self-hosted/target.zig index 0cc8d02a6250..6fe589ae5236 100644 --- a/src-self-hosted/target.zig +++ b/src-self-hosted/target.zig @@ -250,8 +250,20 @@ pub const Target = union(enum) { builtin.Arch.renderscript32, => return 32, - builtin.Arch.aarch64, - builtin.Arch.aarch64_be, + builtin.Arch.aarch64v8_3a, + builtin.Arch.aarch64v8_2a, + builtin.Arch.aarch64v8_1a, + builtin.Arch.aarch64v8, + builtin.Arch.aarch64v8r, + builtin.Arch.aarch64v8m_baseline, + builtin.Arch.aarch64v8m_mainline, + builtin.Arch.aarch64_bev8_3a, + builtin.Arch.aarch64_bev8_2a, + builtin.Arch.aarch64_bev8_1a, + builtin.Arch.aarch64_bev8, + builtin.Arch.aarch64_bev8r, + builtin.Arch.aarch64_bev8m_baseline, + builtin.Arch.aarch64_bev8m_mainline, builtin.Arch.mips64, builtin.Arch.mips64el, builtin.Arch.powerpc64, @@ -316,8 +328,23 @@ pub const Target = union(enum) { builtin.Arch.sparcel, => return "/lib/ld-linux.so.2", - builtin.Arch.aarch64 => return "/lib/ld-linux-aarch64.so.1", - builtin.Arch.aarch64_be => return "/lib/ld-linux-aarch64_be.so.1", + builtin.Arch.aarch64v8_3a, + builtin.Arch.aarch64v8_2a, + builtin.Arch.aarch64v8_1a, + builtin.Arch.aarch64v8, + builtin.Arch.aarch64v8r, + builtin.Arch.aarch64v8m_baseline, + builtin.Arch.aarch64v8m_mainline, + => return "/lib/ld-linux-aarch64.so.1", + + builtin.Arch.aarch64_bev8_3a, + builtin.Arch.aarch64_bev8_2a, + builtin.Arch.aarch64_bev8_1a, + builtin.Arch.aarch64_bev8, + builtin.Arch.aarch64_bev8r, + builtin.Arch.aarch64_bev8m_baseline, + builtin.Arch.aarch64_bev8m_mainline, + => return "/lib/ld-linux-aarch64_be.so.1", builtin.Arch.armv8_3a, builtin.Arch.armv8_2a, @@ -530,7 +557,14 @@ pub const Target = union(enum) { pub fn getDarwinArchString(self: Target) []const u8 { const arch = self.getArch(); switch (arch) { - builtin.Arch.aarch64 => return "arm64", + builtin.Arch.aarch64v8_3a, + builtin.Arch.aarch64v8_2a, + builtin.Arch.aarch64v8_1a, + builtin.Arch.aarch64v8, + builtin.Arch.aarch64v8r, + builtin.Arch.aarch64v8m_baseline, + builtin.Arch.aarch64v8m_mainline, + => return "arm64", builtin.Arch.thumb, builtin.Arch.armv8_3a, builtin.Arch.armv8_2a, diff --git a/src/os.cpp b/src/os.cpp index 0e62d84a48ca..5c6d4fd5b09f 100644 --- a/src/os.cpp +++ b/src/os.cpp @@ -125,7 +125,7 @@ static void populate_termination(Termination *term, int status) { static void os_spawn_process_posix(const char *exe, ZigList &args, Termination *term) { pid_t pid = fork(); if (pid == -1) - zig_panic("fork failed"); + zig_panic("fork failed: %s", strerror(errno)); if (pid == 0) { // child const char **argv = allocate(args.length + 2); @@ -841,7 +841,7 @@ static int os_exec_process_posix(const char *exe, ZigList &args, pid_t pid = fork(); if (pid == -1) - zig_panic("fork failed"); + zig_panic("fork failed: %s", strerror(errno)); if (pid == 0) { // child if (dup2(stdin_pipe[0], STDIN_FILENO) == -1) diff --git a/src/target.cpp b/src/target.cpp index 91d36c5109e0..a726d1bcbbaf 100644 --- a/src/target.cpp +++ b/src/target.cpp @@ -55,8 +55,22 @@ static const ArchType arch_list[] = { {ZigLLVM_armeb, ZigLLVM_ARMSubArch_v5te}, {ZigLLVM_armeb, ZigLLVM_ARMSubArch_v4t}, - {ZigLLVM_aarch64, ZigLLVM_NoSubArch}, - {ZigLLVM_aarch64_be, ZigLLVM_NoSubArch}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8_3a}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8_2a}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8_1a}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8r}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8m_baseline}, + {ZigLLVM_aarch64, ZigLLVM_ARMSubArch_v8m_mainline}, + + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8_3a}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8_2a}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8_1a}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8r}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8m_baseline}, + {ZigLLVM_aarch64_be, ZigLLVM_ARMSubArch_v8m_mainline}, + {ZigLLVM_arc, ZigLLVM_NoSubArch}, {ZigLLVM_avr, ZigLLVM_NoSubArch}, {ZigLLVM_bpfel, ZigLLVM_NoSubArch}, @@ -928,8 +942,9 @@ const char *arch_stack_pointer_register_name(const ArchType *arch) { return "sp"; case ZigLLVM_x86_64: return "rsp"; - case ZigLLVM_aarch64: + return "sp"; + case ZigLLVM_arm: case ZigLLVM_thumb: case ZigLLVM_aarch64_be: diff --git a/std/elf.zig b/std/elf.zig index a3a72dc72803..bc07bffb453e 100644 --- a/std/elf.zig +++ b/std/elf.zig @@ -859,6 +859,11 @@ pub const Elf_MIPS_ABIFlags_v0 = extern struct { flags2: Elf32_Word, }; +pub const Auxv = switch (@sizeOf(usize)) { + 4 => Elf32_auxv_t, + 8 => Elf64_auxv_t, + else => @compileError("expected pointer size of 32 or 64"), +}; pub const Ehdr = switch (@sizeOf(usize)) { 4 => Elf32_Ehdr, 8 => Elf64_Ehdr, diff --git a/std/fmt/index.zig b/std/fmt/index.zig index 80af750f3d5d..6c076e7f0b9d 100644 --- a/std/fmt/index.zig +++ b/std/fmt/index.zig @@ -1034,7 +1034,9 @@ test "fmt.format" { const result = try bufPrint(buf1[0..], "f64: {}\n", math.nan_f64); assert(mem.eql(u8, result, "f64: nan\n")); } - { + if (builtin.arch != builtin.Arch.armv8) { + // negative nan is not defined by IEE 754, + // and ARM thus normalizes it to positive nan var buf1: [32]u8 = undefined; const result = try bufPrint(buf1[0..], "f64: {}\n", -math.nan_f64); assert(mem.eql(u8, result, "f64: -nan\n")); diff --git a/std/math/index.zig b/std/math/index.zig index e5fd0f3685bf..afc19a380595 100644 --- a/std/math/index.zig +++ b/std/math/index.zig @@ -8,7 +8,7 @@ pub const pi = 3.14159265358979323846264338327950288419716939937510; // float.h details pub const f64_true_min = 4.94065645841246544177e-324; -pub const f64_min = 2.22507385850720138309e-308; +pub const f64_min = 2.2250738585072014e-308; pub const f64_max = 1.79769313486231570815e+308; pub const f64_epsilon = 2.22044604925031308085e-16; pub const f64_toint = 1.0 / f64_epsilon; @@ -650,3 +650,9 @@ pub fn lossyCast(comptime T: type, value: var) T { else => @compileError("bad type"), } } + +test "math.f64_min" { + const f64_min_u64 = 0x0010000000000000; + const fmin: f64 = f64_min; + assert(@bitCast(u64, fmin) == f64_min_u64); +} diff --git a/std/os/index.zig b/std/os/index.zig index 3ab73a79ac12..7089ff8f150d 100644 --- a/std/os/index.zig +++ b/std/os/index.zig @@ -633,16 +633,21 @@ fn posixExecveErrnoToErr(err: usize) PosixExecveError { }; } -pub var linux_aux_raw = []usize{0} ** 38; +pub var linux_elf_aux_maybe: ?[*]std.elf.Auxv = null; pub var posix_environ_raw: [][*]u8 = undefined; /// See std.elf for the constants. pub fn linuxGetAuxVal(index: usize) usize { if (builtin.link_libc) { return usize(std.c.getauxval(index)); - } else { - return linux_aux_raw[index]; + } else if (linux_elf_aux_maybe) |auxv| { + var i: usize = 0; + while (auxv[i].a_type != std.elf.AT_NULL) : (i += 1) { + if (auxv[i].a_type == index) + return auxv[i].a_un.a_val; + } } + return 0; } pub fn getBaseAddress() usize { @@ -1641,7 +1646,7 @@ pub const Dir = struct { } while (true) { - const result = posix.getdents(self.handle.fd, self.handle.buf.ptr, self.handle.buf.len); + const result = posix.getdents64(self.handle.fd, self.handle.buf.ptr, self.handle.buf.len); const err = posix.getErrno(result); if (err > 0) { switch (err) { @@ -1659,7 +1664,7 @@ pub const Dir = struct { break; } } - const linux_entry = @ptrCast(*align(1) posix.dirent, &self.handle.buf[self.handle.index]); + const linux_entry = @ptrCast(*align(1) posix.dirent64, &self.handle.buf[self.handle.index]); const next_index = self.handle.index + linux_entry.d_reclen; self.handle.index = next_index; @@ -1670,8 +1675,7 @@ pub const Dir = struct { continue :start_over; } - const type_char = self.handle.buf[next_index - 1]; - const entry_kind = switch (type_char) { + const entry_kind = switch (linux_entry.d_type) { posix.DT_BLK => Entry.Kind.BlockDevice, posix.DT_CHR => Entry.Kind.CharacterDevice, posix.DT_DIR => Entry.Kind.Directory, diff --git a/std/os/linux/arm64.zig b/std/os/linux/arm64.zig new file mode 100644 index 000000000000..91e4a4967965 --- /dev/null +++ b/std/os/linux/arm64.zig @@ -0,0 +1,465 @@ +const std = @import("../../index.zig"); +const linux = std.os.linux; +const socklen_t = linux.socklen_t; +const iovec = linux.iovec; + +pub const SYS_io_setup = 0; +pub const SYS_io_destroy = 1; +pub const SYS_io_submit = 2; +pub const SYS_io_cancel = 3; +pub const SYS_io_getevents = 4; +pub const SYS_setxattr = 5; +pub const SYS_lsetxattr = 6; +pub const SYS_fsetxattr = 7; +pub const SYS_getxattr = 8; +pub const SYS_lgetxattr = 9; +pub const SYS_fgetxattr = 10; +pub const SYS_listxattr = 11; +pub const SYS_llistxattr = 12; +pub const SYS_flistxattr = 13; +pub const SYS_removexattr = 14; +pub const SYS_lremovexattr = 15; +pub const SYS_fremovexattr = 16; +pub const SYS_getcwd = 17; +pub const SYS_lookup_dcookie = 18; +pub const SYS_eventfd2 = 19; +pub const SYS_epoll_create1 = 20; +pub const SYS_epoll_ctl = 21; +pub const SYS_epoll_pwait = 22; +pub const SYS_dup = 23; +pub const SYS_dup3 = 24; +pub const SYS_fcntl = 25; +pub const SYS_inotify_init1 = 26; +pub const SYS_inotify_add_watch = 27; +pub const SYS_inotify_rm_watch = 28; +pub const SYS_ioctl = 29; +pub const SYS_ioprio_set = 30; +pub const SYS_ioprio_get = 31; +pub const SYS_flock = 32; +pub const SYS_mknodat = 33; +pub const SYS_mkdirat = 34; +pub const SYS_unlinkat = 35; +pub const SYS_symlinkat = 36; +pub const SYS_linkat = 37; +pub const SYS_renameat = 38; +pub const SYS_umount2 = 39; +pub const SYS_mount = 40; +pub const SYS_pivot_root = 41; +pub const SYS_nfsservctl = 42; +pub const SYS_statfs = 43; +pub const SYS_fstatfs = 44; +pub const SYS_truncate = 45; +pub const SYS_ftruncate = 46; +pub const SYS_fallocate = 47; +pub const SYS_faccessat = 48; +pub const SYS_chdir = 49; +pub const SYS_fchdir = 50; +pub const SYS_chroot = 51; +pub const SYS_fchmod = 52; +pub const SYS_fchmodat = 53; +pub const SYS_fchownat = 54; +pub const SYS_fchown = 55; +pub const SYS_openat = 56; +pub const SYS_close = 57; +pub const SYS_vhangup = 58; +pub const SYS_pipe2 = 59; +pub const SYS_quotactl = 60; +pub const SYS_getdents64 = 61; +pub const SYS_lseek = 62; +pub const SYS_read = 63; +pub const SYS_write = 64; +pub const SYS_readv = 65; +pub const SYS_writev = 66; +pub const SYS_pread64 = 67; +pub const SYS_pwrite64 = 68; +pub const SYS_preadv = 69; +pub const SYS_pwritev = 70; +pub const SYS_pselect6 = 72; +pub const SYS_ppoll = 73; +pub const SYS_signalfd4 = 74; +pub const SYS_vmsplice = 75; +pub const SYS_splice = 76; +pub const SYS_tee = 77; +pub const SYS_readlinkat = 78; +pub const SYS_fstatat = 79; +pub const SYS_fstat = 80; +pub const SYS_sync = 81; +pub const SYS_fsync = 82; +pub const SYS_fdatasync = 83; +pub const SYS_sync_file_range2 = 84; +pub const SYS_sync_file_range = 84; +pub const SYS_timerfd_create = 85; +pub const SYS_timerfd_settime = 86; +pub const SYS_timerfd_gettime = 87; +pub const SYS_utimensat = 88; +pub const SYS_acct = 89; +pub const SYS_capget = 90; +pub const SYS_capset = 91; +pub const SYS_personality = 92; +pub const SYS_exit = 93; +pub const SYS_exit_group = 94; +pub const SYS_waitid = 95; +pub const SYS_set_tid_address = 96; +pub const SYS_unshare = 97; +pub const SYS_futex = 98; +pub const SYS_set_robust_list = 99; +pub const SYS_get_robust_list = 100; +pub const SYS_nanosleep = 101; +pub const SYS_getitimer = 102; +pub const SYS_setitimer = 103; +pub const SYS_kexec_load = 104; +pub const SYS_init_module = 105; +pub const SYS_delete_module = 106; +pub const SYS_timer_create = 107; +pub const SYS_timer_gettime = 108; +pub const SYS_timer_getoverrun = 109; +pub const SYS_timer_settime = 110; +pub const SYS_timer_delete = 111; +pub const SYS_clock_settime = 112; +pub const SYS_clock_gettime = 113; +pub const SYS_clock_getres = 114; +pub const SYS_clock_nanosleep = 115; +pub const SYS_syslog = 116; +pub const SYS_ptrace = 117; +pub const SYS_sched_setparam = 118; +pub const SYS_sched_setscheduler = 119; +pub const SYS_sched_getscheduler = 120; +pub const SYS_sched_getparam = 121; +pub const SYS_sched_setaffinity = 122; +pub const SYS_sched_getaffinity = 123; +pub const SYS_sched_yield = 124; +pub const SYS_sched_get_priority_max = 125; +pub const SYS_sched_get_priority_min = 126; +pub const SYS_sched_rr_get_interval = 127; +pub const SYS_restart_syscall = 128; +pub const SYS_kill = 129; +pub const SYS_tkill = 130; +pub const SYS_tgkill = 131; +pub const SYS_sigaltstack = 132; +pub const SYS_rt_sigsuspend = 133; +pub const SYS_rt_sigaction = 134; +pub const SYS_rt_sigprocmask = 135; +pub const SYS_rt_sigpending = 136; +pub const SYS_rt_sigtimedwait = 137; +pub const SYS_rt_sigqueueinfo = 138; +pub const SYS_rt_sigreturn = 139; +pub const SYS_setpriority = 140; +pub const SYS_getpriority = 141; +pub const SYS_reboot = 142; +pub const SYS_setregid = 143; +pub const SYS_setgid = 144; +pub const SYS_setreuid = 145; +pub const SYS_setuid = 146; +pub const SYS_setresuid = 147; +pub const SYS_getresuid = 148; +pub const SYS_setresgid = 149; +pub const SYS_getresgid = 150; +pub const SYS_setfsuid = 151; +pub const SYS_setfsgid = 152; +pub const SYS_times = 153; +pub const SYS_setpgid = 154; +pub const SYS_getpgid = 155; +pub const SYS_getsid = 156; +pub const SYS_setsid = 157; +pub const SYS_getgroups = 158; +pub const SYS_setgroups = 159; +pub const SYS_uname = 160; +pub const SYS_sethostname = 161; +pub const SYS_setdomainname = 162; +pub const SYS_getrlimit = 163; +pub const SYS_setrlimit = 164; +pub const SYS_getrusage = 165; +pub const SYS_umask = 166; +pub const SYS_prctl = 167; +pub const SYS_getcpu = 168; +pub const SYS_gettimeofday = 169; +pub const SYS_settimeofday = 170; +pub const SYS_adjtimex = 171; +pub const SYS_getpid = 172; +pub const SYS_getppid = 173; +pub const SYS_getuid = 174; +pub const SYS_geteuid = 175; +pub const SYS_getgid = 176; +pub const SYS_getegid = 177; +pub const SYS_gettid = 178; +pub const SYS_sysinfo = 179; +pub const SYS_mq_open = 180; +pub const SYS_mq_unlink = 181; +pub const SYS_mq_timedsend = 182; +pub const SYS_mq_timedreceive = 183; +pub const SYS_mq_notify = 184; +pub const SYS_mq_getsetattr = 185; +pub const SYS_msgget = 186; +pub const SYS_msgctl = 187; +pub const SYS_msgrcv = 188; +pub const SYS_msgsnd = 189; +pub const SYS_semget = 190; +pub const SYS_semctl = 191; +pub const SYS_semtimedop = 192; +pub const SYS_semop = 193; +pub const SYS_shmget = 194; +pub const SYS_shmctl = 195; +pub const SYS_shmat = 196; +pub const SYS_shmdt = 197; +pub const SYS_socket = 198; +pub const SYS_socketpair = 199; +pub const SYS_bind = 200; +pub const SYS_listen = 201; +pub const SYS_accept = 202; +pub const SYS_connect = 203; +pub const SYS_getsockname = 204; +pub const SYS_getpeername = 205; +pub const SYS_sendto = 206; +pub const SYS_recvfrom = 207; +pub const SYS_setsockopt = 208; +pub const SYS_getsockopt = 209; +pub const SYS_shutdown = 210; +pub const SYS_sendmsg = 211; +pub const SYS_recvmsg = 212; +pub const SYS_readahead = 213; +pub const SYS_brk = 214; +pub const SYS_munmap = 215; +pub const SYS_mremap = 216; +pub const SYS_add_key = 217; +pub const SYS_request_key = 218; +pub const SYS_keyctl = 219; +pub const SYS_clone = 220; +pub const SYS_execve = 221; +pub const SYS_mmap = 222; +pub const SYS_fadvise64 = 223; +pub const SYS_swapon = 224; +pub const SYS_swapoff = 225; +pub const SYS_mprotect = 226; +pub const SYS_msync = 227; +pub const SYS_mlock = 228; +pub const SYS_munlock = 229; +pub const SYS_mlockall = 230; +pub const SYS_munlockall = 231; +pub const SYS_mincore = 232; +pub const SYS_madvise = 233; +pub const SYS_remap_file_pages = 234; +pub const SYS_mbind = 235; +pub const SYS_get_mempolicy = 236; +pub const SYS_set_mempolicy = 237; +pub const SYS_migrate_pages = 238; +pub const SYS_move_pages = 239; +pub const SYS_rt_tgsigqueueinfo = 240; +pub const SYS_perf_event_open = 241; +pub const SYS_accept4 = 242; +pub const SYS_recvmmsg = 243; +pub const SYS_arch_specific_syscall = 244; +pub const SYS_wait4 = 260; +pub const SYS_prlimit64 = 261; +pub const SYS_fanotify_init = 262; +pub const SYS_fanotify_mark = 263; +pub const SYS_clock_adjtime = 266; +pub const SYS_syncfs = 267; +pub const SYS_setns = 268; +pub const SYS_sendmmsg = 269; +pub const SYS_process_vm_readv = 270; +pub const SYS_process_vm_writev = 271; +pub const SYS_kcmp = 272; +pub const SYS_finit_module = 273; +pub const SYS_sched_setattr = 274; +pub const SYS_sched_getattr = 275; +pub const SYS_renameat2 = 276; +pub const SYS_seccomp = 277; +pub const SYS_getrandom = 278; +pub const SYS_memfd_create = 279; +pub const SYS_bpf = 280; +pub const SYS_execveat = 281; +pub const SYS_userfaultfd = 282; +pub const SYS_membarrier = 283; +pub const SYS_mlock2 = 284; +pub const SYS_copy_file_range = 285; +pub const SYS_preadv2 = 286; +pub const SYS_pwritev2 = 287; +pub const SYS_pkey_mprotect = 288; +pub const SYS_pkey_alloc = 289; +pub const SYS_pkey_free = 290; +pub const SYS_statx = 291; +pub const SYS_io_pgetevents = 292; +pub const SYS_syscalls = 293; + +pub const O_CREAT = 0o100; +pub const O_EXCL = 0o200; +pub const O_NOCTTY = 0o400; +pub const O_TRUNC = 0o1000; +pub const O_APPEND = 0o2000; +pub const O_NONBLOCK = 0o4000; +pub const O_DSYNC = 0o10000; +pub const O_SYNC = 0o4010000; +pub const O_RSYNC = 0o4010000; +pub const O_DIRECTORY = 0o200000; +pub const O_NOFOLLOW = 0o400000; +pub const O_CLOEXEC = 0o2000000; + +pub const O_ASYNC = 0o20000; +pub const O_DIRECT = 0o40000; +pub const O_LARGEFILE = 0; +pub const O_NOATIME = 0o1000000; +pub const O_PATH = 0o10000000; +pub const O_TMPFILE = 0o20200000; +pub const O_NDELAY = O_NONBLOCK; + +pub const F_DUPFD = 0; +pub const F_GETFD = 1; +pub const F_SETFD = 2; +pub const F_GETFL = 3; +pub const F_SETFL = 4; + +pub const F_SETOWN = 8; +pub const F_GETOWN = 9; +pub const F_SETSIG = 10; +pub const F_GETSIG = 11; + +pub const F_GETLK = 5; +pub const F_SETLK = 6; +pub const F_SETLKW = 7; + +pub const F_SETOWN_EX = 15; +pub const F_GETOWN_EX = 16; + +pub const F_GETOWNER_UIDS = 17; + +pub const AT_FDCWD = -100; +pub const AT_SYMLINK_NOFOLLOW = 0x100; +pub const AT_REMOVEDIR = 0x200; +pub const AT_SYMLINK_FOLLOW = 0x400; +pub const AT_NO_AUTOMOUNT = 0x800; +pub const AT_EMPTY_PATH = 0x1000; + +pub const VDSO_USEFUL = true; +pub const VDSO_CGT_SYM = "__kernel_clock_gettime"; +pub const VDSO_CGT_VER = "LINUX_2.6.39"; + +pub fn syscall0(number: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number) + ); +} + +pub fn syscall1(number: usize, arg1: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1) + ); +} + +pub fn syscall2(number: usize, arg1: usize, arg2: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1), + [arg2] "{x1}" (arg2) + ); +} + +pub fn syscall3(number: usize, arg1: usize, arg2: usize, arg3: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1), + [arg2] "{x1}" (arg2), + [arg3] "{x2}" (arg3) + ); +} + +pub fn syscall4(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1), + [arg2] "{x1}" (arg2), + [arg3] "{x2}" (arg3), + [arg4] "{x3}" (arg4) + ); +} + +pub fn syscall5(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1), + [arg2] "{x1}" (arg2), + [arg3] "{x2}" (arg3), + [arg4] "{x3}" (arg4), + [arg5] "{x4}" (arg5) + ); +} + +pub fn syscall6( + number: usize, + arg1: usize, + arg2: usize, + arg3: usize, + arg4: usize, + arg5: usize, + arg6: usize, +) usize { + return asm volatile ("svc #0" + : [ret] "={x0}" (-> usize) + : [number] "{x8}" (number), + [arg1] "{x0}" (arg1), + [arg2] "{x1}" (arg2), + [arg3] "{x2}" (arg3), + [arg4] "{x3}" (arg4), + [arg5] "{x4}" (arg5), + [arg6] "{x5}" (arg6) + ); +} + +/// This matches the libc clone function. +pub extern fn clone(func: extern fn (arg: usize) u8, stack: usize, flags: u32, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize; + +pub const msghdr = extern struct { + msg_name: *u8, + msg_namelen: socklen_t, + msg_iov: *iovec, + msg_iovlen: i32, + __pad1: i32, + msg_control: *u8, + msg_controllen: socklen_t, + __pad2: socklen_t, + msg_flags: i32, +}; + +/// Renamed to Stat to not conflict with the stat function. +pub const Stat = extern struct { + dev: u64, + ino: u64, + nlink: usize, + + mode: u32, + uid: u32, + gid: u32, + __pad0: u32, + rdev: u64, + size: i64, + blksize: isize, + blocks: i64, + + atim: timespec, + mtim: timespec, + ctim: timespec, + __unused: [3]isize, +}; + +pub const timespec = extern struct { + tv_sec: isize, + tv_nsec: isize, +}; + +pub const timeval = extern struct { + tv_sec: isize, + tv_usec: isize, +}; + +pub const timezone = extern struct { + tz_minuteswest: i32, + tz_dsttime: i32, +}; + +pub const Elf_Symndx = u32; diff --git a/std/os/linux/index.zig b/std/os/linux/index.zig index c369921e14ca..5f0912cf8f13 100644 --- a/std/os/linux/index.zig +++ b/std/os/linux/index.zig @@ -5,6 +5,7 @@ const vdso = @import("vdso.zig"); pub use switch (builtin.arch) { builtin.Arch.x86_64 => @import("x86_64.zig"), builtin.Arch.i386 => @import("i386.zig"), + builtin.Arch.aarch64v8 => @import("arm64.zig"), else => @compileError("unsupported arch"), }; pub use @import("errno.zig"); @@ -697,7 +698,11 @@ pub fn getErrno(r: usize) usize { } pub fn dup2(old: i32, new: i32) usize { - return syscall2(SYS_dup2, @intCast(usize, old), @intCast(usize, new)); + return dup3(old, new, 0); +} + +pub fn dup3(old: i32, new: i32, flags: u32) usize { + return syscall3(SYS_dup3, @intCast(usize, old), @intCast(usize, new), flags); } // TODO https://github.com/ziglang/zig/issues/265 @@ -716,7 +721,7 @@ pub fn execve(path: [*]const u8, argv: [*]const ?[*]const u8, envp: [*]const ?[* } pub fn fork() usize { - return syscall0(SYS_fork); + return clone2(SIGCHLD, 0); } pub fn futex_wait(uaddr: usize, futex_op: u32, val: i32, timeout: ?*timespec) usize { @@ -731,8 +736,8 @@ pub fn getcwd(buf: [*]u8, size: usize) usize { return syscall2(SYS_getcwd, @ptrToInt(buf), size); } -pub fn getdents(fd: i32, dirp: [*]u8, count: usize) usize { - return syscall3(SYS_getdents, @intCast(usize, fd), @ptrToInt(dirp), count); +pub fn getdents64(fd: i32, dirp: [*]u8, count: usize) usize { + return syscall3(SYS_getdents64, @intCast(usize, fd), @ptrToInt(dirp), count); } pub fn inotify_init1(flags: u32) usize { @@ -754,16 +759,26 @@ pub fn isatty(fd: i32) bool { // TODO https://github.com/ziglang/zig/issues/265 pub fn readlink(noalias path: [*]const u8, noalias buf_ptr: [*]u8, buf_len: usize) usize { - return syscall3(SYS_readlink, @ptrToInt(path), @ptrToInt(buf_ptr), buf_len); + return readlinkat(AT_FDCWD, path, buf_ptr, buf_len); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn readlinkat(dirfd: i32, noalias path: [*]const u8, noalias buf_ptr: [*]u8, buf_len: usize) usize { + return syscall4(SYS_readlinkat, @intCast(usize, dirfd), @ptrToInt(path), @ptrToInt(buf_ptr), buf_len); } // TODO https://github.com/ziglang/zig/issues/265 pub fn mkdir(path: [*]const u8, mode: u32) usize { - return syscall2(SYS_mkdir, @ptrToInt(path), mode); + return mkdirat(AT_FDCWD, path, mode); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn mkdirat(dirfd: i32, path: [*]const u8, mode: u32) usize { + return syscall3(SYS_mkdirat, @intCast(usize, dirfd), @ptrToInt(path), mode); } // TODO https://github.com/ziglang/zig/issues/265 -pub fn mount(special: [*]const u8, dir: [*]const u8, fstype: [*]const u8, flags: usize, data: usize) usize { +pub fn mount(special: [*]const u8, dir: [*]const u8, fstype: [*]const u8, flags: u32, data: usize) usize { return syscall5(SYS_mount, @ptrToInt(special), @ptrToInt(dir), @ptrToInt(fstype), flags, data); } @@ -799,28 +814,38 @@ pub fn pwritev(fd: i32, iov: [*]const iovec_const, count: usize, offset: u64) us // TODO https://github.com/ziglang/zig/issues/265 pub fn rmdir(path: [*]const u8) usize { - return syscall1(SYS_rmdir, @ptrToInt(path)); + return unlinkat(AT_FDCWD, path, AT_REMOVEDIR); } // TODO https://github.com/ziglang/zig/issues/265 pub fn symlink(existing: [*]const u8, new: [*]const u8) usize { - return syscall2(SYS_symlink, @ptrToInt(existing), @ptrToInt(new)); + return symlinkat(existing, AT_FDCWD, new); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn symlinkat(existing: [*]const u8, newfd: i32, newpath: [*]const u8) usize { + return syscall3(SYS_symlinkat, @ptrToInt(existing), @intCast(usize, newfd), @ptrToInt(newpath)); } +// TODO https://github.com/ziglang/zig/issues/265 pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: usize) usize { return syscall4(SYS_pread, @intCast(usize, fd), @ptrToInt(buf), count, offset); } // TODO https://github.com/ziglang/zig/issues/265 pub fn access(path: [*]const u8, mode: u32) usize { - return syscall2(SYS_access, @ptrToInt(path), mode); + return faccessat(AT_FDCWD, path, mode); +} + +pub fn faccessat(dirfd: i32, path: [*]const u8, mode: u32) usize { + return syscall3(SYS_faccessat, @intCast(usize, dirfd), @ptrToInt(path), mode); } pub fn pipe(fd: *[2]i32) usize { return pipe2(fd, 0); } -pub fn pipe2(fd: *[2]i32, flags: usize) usize { +pub fn pipe2(fd: *[2]i32, flags: u32) usize { return syscall2(SYS_pipe2, @ptrToInt(fd), flags); } @@ -834,12 +859,17 @@ pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: usize) usize { // TODO https://github.com/ziglang/zig/issues/265 pub fn rename(old: [*]const u8, new: [*]const u8) usize { - return syscall2(SYS_rename, @ptrToInt(old), @ptrToInt(new)); + return renameat2(AT_FDCWD, old, AT_FDCWD, new, 0); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn renameat2(oldfd: i32, oldpath: [*]const u8, newfd: i32, newpath: [*]const u8, flags: u32) usize { + return syscall5(SYS_renameat2, @intCast(usize, oldfd), @ptrToInt(oldpath), @intCast(usize, newfd), @ptrToInt(newpath), flags); } // TODO https://github.com/ziglang/zig/issues/265 pub fn open(path: [*]const u8, flags: u32, perm: usize) usize { - return syscall3(SYS_open, @ptrToInt(path), flags, perm); + return openat(AT_FDCWD, path, flags, perm); } // TODO https://github.com/ziglang/zig/issues/265 @@ -848,7 +878,7 @@ pub fn create(path: [*]const u8, perm: usize) usize { } // TODO https://github.com/ziglang/zig/issues/265 -pub fn openat(dirfd: i32, path: [*]const u8, flags: usize, mode: usize) usize { +pub fn openat(dirfd: i32, path: [*]const u8, flags: u32, mode: usize) usize { return syscall4(SYS_openat, @intCast(usize, dirfd), @ptrToInt(path), flags, mode); } @@ -858,7 +888,7 @@ pub fn clone5(flags: usize, child_stack_ptr: usize, parent_tid: *i32, child_tid: } /// See also `clone` (from the arch-specific include) -pub fn clone2(flags: usize, child_stack_ptr: usize) usize { +pub fn clone2(flags: u32, child_stack_ptr: usize) usize { return syscall2(SYS_clone, flags, child_stack_ptr); } @@ -876,7 +906,7 @@ pub fn exit(status: i32) noreturn { } pub fn getrandom(buf: [*]u8, count: usize, flags: u32) usize { - return syscall3(SYS_getrandom, @ptrToInt(buf), count, @intCast(usize, flags)); + return syscall3(SYS_getrandom, @ptrToInt(buf), count, flags); } pub fn kill(pid: i32, sig: i32) usize { @@ -885,7 +915,12 @@ pub fn kill(pid: i32, sig: i32) usize { // TODO https://github.com/ziglang/zig/issues/265 pub fn unlink(path: [*]const u8) usize { - return syscall1(SYS_unlink, @ptrToInt(path)); + return unlinkat(AT_FDCWD, path, 0); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn unlinkat(dirfd: i32, path: [*]const u8, flags: u32) usize { + return syscall3(SYS_unlinkat, @intCast(usize, dirfd), @ptrToInt(path), flags); } pub fn waitpid(pid: i32, status: *i32, options: i32) usize { @@ -1194,12 +1229,17 @@ pub fn fstat(fd: i32, stat_buf: *Stat) usize { // TODO https://github.com/ziglang/zig/issues/265 pub fn stat(pathname: [*]const u8, statbuf: *Stat) usize { - return syscall2(SYS_stat, @ptrToInt(pathname), @ptrToInt(statbuf)); + return fstatat(AT_FDCWD, pathname, statbuf, AT_NO_AUTOMOUNT); } // TODO https://github.com/ziglang/zig/issues/265 pub fn lstat(pathname: [*]const u8, statbuf: *Stat) usize { - return syscall2(SYS_lstat, @ptrToInt(pathname), @ptrToInt(statbuf)); + return fstatat(AF_FDCWD, pathname, statbuf, AT_SYMLINK_NOFOLLOW|AT_NO_AUTOMOUNT); +} + +// TODO https://github.com/ziglang/zig/issues/265 +pub fn fstatat(dirfd: i32, path: [*]const u8, stat_buf: *Stat, flags: u32) usize { + return syscall4(SYS_fstatat, @intCast(usize, dirfd), @ptrToInt(path), @ptrToInt(stat_buf), flags); } // TODO https://github.com/ziglang/zig/issues/265 @@ -1290,7 +1330,18 @@ pub fn epoll_ctl(epoll_fd: i32, op: u32, fd: i32, ev: *epoll_event) usize { } pub fn epoll_wait(epoll_fd: i32, events: [*]epoll_event, maxevents: u32, timeout: i32) usize { - return syscall4(SYS_epoll_wait, @intCast(usize, epoll_fd), @ptrToInt(events), @intCast(usize, maxevents), @intCast(usize, timeout)); + return epoll_pwait(epoll_fd, events, maxevents, timeout, null); +} + +pub fn epoll_pwait(epoll_fd: i32, events: [*]epoll_event, maxevents: u32, timeout: i32, sigmask: ?*sigset_t) usize { + return syscall6(SYS_epoll_pwait, + @intCast(usize, epoll_fd), + @ptrToInt(events), + @intCast(usize, maxevents), + @intCast(usize, timeout), + @ptrToInt(sigmask), + @sizeOf(sigset_t) + ); } pub fn eventfd(count: u32, flags: u32) usize { @@ -1298,7 +1349,7 @@ pub fn eventfd(count: u32, flags: u32) usize { } pub fn timerfd_create(clockid: i32, flags: u32) usize { - return syscall2(SYS_timerfd_create, @intCast(usize, clockid), @intCast(usize, flags)); + return syscall2(SYS_timerfd_create, @intCast(usize, clockid), flags); } pub const itimerspec = extern struct { @@ -1311,7 +1362,7 @@ pub fn timerfd_gettime(fd: i32, curr_value: *itimerspec) usize { } pub fn timerfd_settime(fd: i32, flags: u32, new_value: *const itimerspec, old_value: ?*itimerspec) usize { - return syscall4(SYS_timerfd_settime, @intCast(usize, fd), @intCast(usize, flags), @ptrToInt(new_value), @ptrToInt(old_value)); + return syscall4(SYS_timerfd_settime, @intCast(usize, fd), flags, @ptrToInt(new_value), @ptrToInt(old_value)); } pub const _LINUX_CAPABILITY_VERSION_1 = 0x19980330; @@ -1421,7 +1472,7 @@ pub const cap_user_data_t = extern struct { }; pub fn unshare(flags: usize) usize { - return syscall1(SYS_unshare, @intCast(usize, flags)); + return syscall1(SYS_unshare, flags); } pub fn capget(hdrp: *cap_user_header_t, datap: *cap_user_data_t) usize { @@ -1440,6 +1491,14 @@ pub const inotify_event = extern struct { //name: [?]u8, }; +pub const dirent64 = extern struct { + d_ino: u64, + d_off: u64, + d_reclen: u16, + d_type: u8, + d_name: u8, // field address is the address of first byte of name https://github.com/ziglang/zig/issues/173 +}; + test "import" { if (builtin.os == builtin.Os.linux) { _ = @import("test.zig"); diff --git a/std/os/linux/vdso.zig b/std/os/linux/vdso.zig index a78e3370e6b4..f0e0e6eb6c9c 100644 --- a/std/os/linux/vdso.zig +++ b/std/os/linux/vdso.zig @@ -5,7 +5,7 @@ const cstr = std.cstr; const mem = std.mem; pub fn lookup(vername: []const u8, name: []const u8) usize { - const vdso_addr = std.os.linux_aux_raw[std.elf.AT_SYSINFO_EHDR]; + const vdso_addr = std.os.linuxGetAuxVal(std.elf.AT_SYSINFO_EHDR); if (vdso_addr == 0) return 0; const eh = @intToPtr(*elf.Ehdr, vdso_addr); diff --git a/std/os/linux/x86_64.zig b/std/os/linux/x86_64.zig index 9a90e6475706..2ea369d9f289 100644 --- a/std/os/linux/x86_64.zig +++ b/std/os/linux/x86_64.zig @@ -266,6 +266,8 @@ pub const SYS_mknodat = 259; pub const SYS_fchownat = 260; pub const SYS_futimesat = 261; pub const SYS_newfstatat = 262; +// https://github.com/ziglang/zig/issues/1439 +pub const SYS_fstatat = 262; pub const SYS_unlinkat = 263; pub const SYS_renameat = 264; pub const SYS_linkat = 265; @@ -371,6 +373,13 @@ pub const F_GETOWN_EX = 16; pub const F_GETOWNER_UIDS = 17; +pub const AT_FDCWD = -100; +pub const AT_SYMLINK_NOFOLLOW = 0x100; +pub const AT_REMOVEDIR = 0x200; +pub const AT_SYMLINK_FOLLOW = 0x400; +pub const AT_NO_AUTOMOUNT = 0x800; +pub const AT_EMPTY_PATH = 0x1000; + pub const VDSO_USEFUL = true; pub const VDSO_CGT_SYM = "__vdso_clock_gettime"; pub const VDSO_CGT_VER = "LINUX_2.6"; @@ -521,11 +530,4 @@ pub const timezone = extern struct { tz_dsttime: i32, }; -pub const dirent = extern struct { - d_ino: usize, - d_off: usize, - d_reclen: u16, - d_name: u8, // field address is the address of first byte of name -}; - pub const Elf_Symndx = u32; diff --git a/std/special/bootstrap.zig b/std/special/bootstrap.zig index 47b57c6c2338..feaa04332bda 100644 --- a/std/special/bootstrap.zig +++ b/std/special/bootstrap.zig @@ -30,6 +30,11 @@ nakedcc fn _start() noreturn { : [argc] "=r" (-> [*]usize) ); }, + builtin.Arch.aarch64v8 => { + argc_ptr = asm ("mov %[argc], sp" + : [argc] "=r" (-> [*]usize) + ); + }, else => @compileError("unsupported arch"), } // If LLVM inlines stack variables into _start, they will overwrite @@ -54,11 +59,8 @@ fn posixCallMainAndExit() noreturn { const envp = @ptrCast([*][*]u8, envp_optional)[0..envp_count]; if (builtin.os == builtin.Os.linux) { const auxv = @ptrCast([*]usize, envp.ptr + envp_count + 1); - var i: usize = 0; - while (auxv[i] != 0) : (i += 2) { - if (auxv[i] < std.os.linux_aux_raw.len) std.os.linux_aux_raw[auxv[i]] = auxv[i + 1]; - } - std.debug.assert(std.os.linux_aux_raw[std.elf.AT_PAGESZ] == std.os.page_size); + std.os.linux_elf_aux_maybe = @ptrCast([*]std.elf.Auxv, auxv); + std.debug.assert(std.os.linuxGetAuxVal(std.elf.AT_PAGESZ) == std.os.page_size); } std.os.posix.exit(callMainWithArgs(argc, argv, envp)); diff --git a/std/special/builtin.zig b/std/special/builtin.zig index 56e578030b51..5f4371f99415 100644 --- a/std/special/builtin.zig +++ b/std/special/builtin.zig @@ -60,7 +60,7 @@ comptime { { @export("__stack_chk_fail", __stack_chk_fail, builtin.GlobalLinkage.Strong); } - if (builtin.os == builtin.Os.linux and builtin.arch == builtin.Arch.x86_64) { + if (builtin.os == builtin.Os.linux) { @export("clone", clone, builtin.GlobalLinkage.Strong); } } @@ -72,32 +72,64 @@ extern fn __stack_chk_fail() noreturn { // it causes a segfault in release mode. this is a workaround of calling it // across .o file boundaries. fix comptime @ptrCast of nakedcc functions. nakedcc fn clone() void { - asm volatile ( - \\ xor %%eax,%%eax - \\ mov $56,%%al - \\ mov %%rdi,%%r11 - \\ mov %%rdx,%%rdi - \\ mov %%r8,%%rdx - \\ mov %%r9,%%r8 - \\ mov 8(%%rsp),%%r10 - \\ mov %%r11,%%r9 - \\ and $-16,%%rsi - \\ sub $8,%%rsi - \\ mov %%rcx,(%%rsi) - \\ syscall - \\ test %%eax,%%eax - \\ jnz 1f - \\ xor %%ebp,%%ebp - \\ pop %%rdi - \\ call *%%r9 - \\ mov %%eax,%%edi - \\ xor %%eax,%%eax - \\ mov $60,%%al - \\ syscall - \\ hlt - \\1: ret - \\ - ); + if (builtin.arch == builtin.Arch.x86_64) { + asm volatile ( + \\ xor %%eax,%%eax + \\ mov $56,%%al // SYS_clone + \\ mov %%rdi,%%r11 + \\ mov %%rdx,%%rdi + \\ mov %%r8,%%rdx + \\ mov %%r9,%%r8 + \\ mov 8(%%rsp),%%r10 + \\ mov %%r11,%%r9 + \\ and $-16,%%rsi + \\ sub $8,%%rsi + \\ mov %%rcx,(%%rsi) + \\ syscall + \\ test %%eax,%%eax + \\ jnz 1f + \\ xor %%ebp,%%ebp + \\ pop %%rdi + \\ call *%%r9 + \\ mov %%eax,%%edi + \\ xor %%eax,%%eax + \\ mov $60,%%al // SYS_exit + \\ syscall + \\ hlt + \\1: ret + \\ + ); + } else if (builtin.arch == builtin.Arch.aarch64v8) { + // __clone(func, stack, flags, arg, ptid, tls, ctid) + // x0, x1, w2, x3, x4, x5, x6 + + // syscall(SYS_clone, flags, stack, ptid, tls, ctid) + // x8, x0, x1, x2, x3, x4 + asm volatile ( + \\ // align stack and save func,arg + \\ and x1,x1,#-16 + \\ stp x0,x3,[x1,#-16]! + \\ + \\ // syscall + \\ uxtw x0,w2 + \\ mov x2,x4 + \\ mov x3,x5 + \\ mov x4,x6 + \\ mov x8,#220 // SYS_clone + \\ svc #0 + \\ + \\ cbz x0,1f + \\ // parent + \\ ret + \\ // child + \\1: ldp x1,x0,[sp],#16 + \\ blr x1 + \\ mov x8,#93 // SYS_exit + \\ svc #0 + ); + } else { + @compileError("Implement clone() for this arch."); + } } const math = @import("../math/index.zig");