Add libc definitions for HermitCore (https://hermitcore.org)

HermitCore is based on lwIP, newlib, and pthread-embedded.

4 files changed, 741 insertions, 0 deletions

diff --git a/src/unix/hermit/aarch64.rs b/src/unix/hermit/aarch64.rs
new file mode 100644
index 0000000000..1a92e3b4fa
--- /dev/null
+++ b/src/unix/hermit/aarch64.rs
@@ -0,0 +1,2 @@
+pub type c_char = u8;
+pub type wchar_t = u32;
diff --git a/src/unix/hermit/mod.rs b/src/unix/hermit/mod.rs
new file mode 100644
index 0000000000..6ef01a88c1
--- /dev/null
+++ b/src/unix/hermit/mod.rs
@@ -0,0 +1,729 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// liblibc port for HermitCore (https://hermitcore.org)
+// HermitCore is a unikernel based on lwIP, newlib, and
+// pthread-embedded.
+// Consider these definitions when porting liblibc to another
+// lwIP/newlib/pte-based target.
+//
+// Ported by Colin Finck <colin.finck@rwth-aachen.de>
+
+pub type c_long = i64;
+pub type c_ulong = u64;
+
+pub type uid_t = u16;
+pub type gid_t = u16;
+pub type speed_t = ::c_uint;
+pub type mode_t = u32;
+pub type dev_t = i16;
+pub type nfds_t = ::c_ulong;
+pub type socklen_t = u32;
+pub type sa_family_t = u8;
+pub type clock_t = c_ulong;
+pub type time_t = c_long;
+pub type suseconds_t = c_long;
+pub type off_t = i64;
+pub type rlim_t = ::c_ulonglong;
+pub type sigset_t = ::c_ulong;
+pub type ino_t = u16;
+pub type nlink_t = u16;
+pub type blksize_t = c_long;
+pub type blkcnt_t = c_long;
+pub type stat64 = stat;
+pub type clockid_t = c_ulong;
+pub type pthread_t = pte_handle_t;
+pub type pthread_attr_t = usize;
+pub type pthread_cond_t = usize;
+pub type pthread_condattr_t = usize;
+pub type pthread_key_t = usize;
+pub type pthread_mutex_t = usize;
+pub type pthread_mutexattr_t = usize;
+pub type pthread_rwlock_t = usize;
+pub type pthread_rwlockattr_t = usize;
+
+s! {
+    pub struct addrinfo {
+        pub ai_flags: ::c_int,
+        pub ai_family: ::c_int,
+        pub ai_socktype: ::c_int,
+        pub ai_protocol: ::c_int,
+        pub ai_addrlen: socklen_t,
+        pub ai_addr: *mut ::sockaddr,
+        pub ai_canonname: *mut c_char,
+        pub ai_next: *mut addrinfo,
+    }
+
+    pub struct dirent {
+        pub d_ino: ::c_long,
+        pub d_off: off_t,
+        pub d_reclen: u16,
+        pub d_name: [::c_char; 256],
+    }
+
+    pub struct Dl_info {}
+
+    pub struct fd_set {
+        fds_bits: [::c_ulong; FD_SETSIZE / ULONG_SIZE],
+    }
+
+    pub struct lconv {
+        pub decimal_point: *mut ::c_char,
+        pub thousands_sep: *mut ::c_char,
+        pub grouping: *mut ::c_char,
+        pub int_curr_symbol: *mut ::c_char,
+        pub currency_symbol: *mut ::c_char,
+        pub mon_decimal_point: *mut ::c_char,
+        pub mon_thousands_sep: *mut ::c_char,
+        pub mon_grouping: *mut ::c_char,
+        pub positive_sign: *mut ::c_char,
+        pub negative_sign: *mut ::c_char,
+        pub int_frac_digits: ::c_char,
+        pub frac_digits: ::c_char,
+        pub p_cs_precedes: ::c_char,
+        pub p_sep_by_space: ::c_char,
+        pub n_cs_precedes: ::c_char,
+        pub n_sep_by_space: ::c_char,
+        pub p_sign_posn: ::c_char,
+        pub n_sign_posn: ::c_char,
+        pub int_p_cs_precedes: ::c_char,
+        pub int_p_sep_by_space: ::c_char,
+        pub int_n_cs_precedes: ::c_char,
+        pub int_n_sep_by_space: ::c_char,
+        pub int_p_sign_posn: ::c_char,
+        pub int_n_sign_posn: ::c_char,
+    }
+
+    pub struct passwd { // Unverified
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_gecos: *mut ::c_char,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+    }
+
+    pub struct pte_handle_t {
+        pub p: usize,
+        pub x: ::c_uint,
+    }
+
+    pub struct sched_param {
+        pub sched_priority: ::c_int,
+    }
+
+    pub struct sem_t {
+        pub value: i32,
+        pub lock: usize,
+        pub sem: usize,
+    }
+
+    pub struct sigaction {
+        pub sa_flags: ::c_int,
+        pub sa_mask: sigset_t,
+        pub sa_handler: usize,
+    }
+
+    pub struct sockaddr {
+        pub sa_len: u8,
+        pub sa_family: sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    pub struct sockaddr_in {
+        pub sin_len: u8,
+        pub sin_family: sa_family_t,
+        pub sin_port: ::in_port_t,
+        pub sin_addr: ::in_addr,
+        pub sin_zero: [::c_char; 8],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_len: u8,
+        pub sin6_family: sa_family_t,
+        pub sin6_port: ::in_port_t,
+        pub sin6_flowinfo: u32,
+        pub sin6_addr: ::in6_addr,
+        pub sin6_scope_id: u32,
+    }
+
+    pub struct sockaddr_storage {
+        pub s2_len: u8,
+        pub ss_family: sa_family_t,
+        pub s2_data1: [::c_char; 2],
+        pub s2_data2: [u32; 3],
+        pub s2_data3: [u32; 3],
+    }
+
+    // Dummy
+    pub struct sockaddr_un {
+        pub sun_family: sa_family_t,
+        pub sun_path: [::c_char; 108],
+    }
+
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: dev_t,
+        pub st_size: off_t,
+        pub st_atime: time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: time_t,
+        pub st_ctime_nsec: ::c_long,
+        pub st_blksize: blksize_t,
+        pub st_blocks: blkcnt_t,
+        pub st_spare4: [::c_long; 2],
+    }
+
+    pub struct statvfs {}
+
+    pub struct tm {
+        pub tm_sec: ::c_int,
+        pub tm_min: ::c_int,
+        pub tm_hour: ::c_int,
+        pub tm_mday: ::c_int,
+        pub tm_mon: ::c_int,
+        pub tm_year: ::c_int,
+        pub tm_wday: ::c_int,
+        pub tm_yday: ::c_int,
+        pub tm_isdst: ::c_int,
+    }
+
+    pub struct tms {
+        pub tms_utime: ::clock_t,
+        pub tms_stime: ::clock_t,
+        pub tms_cutime: ::clock_t,
+        pub tms_cstime: ::clock_t,
+    }
+
+    pub struct termios {}
+
+    pub struct utsname {}
+}
+
+pub const AF_UNSPEC: ::c_int = 0;
+pub const AF_INET: ::c_int = 2;
+pub const AF_INET6: ::c_int = 10;
+
+// Dummy
+pub const AF_UNIX: ::c_int = 1;
+
+pub const CLOCK_REALTIME: ::clockid_t = 1;
+pub const CLOCK_MONOTONIC: ::clockid_t = 4;
+
+// Dummy
+pub const EAI_SYSTEM: ::c_int = -11;
+
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EAGAIN: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const ETXTBSY: ::c_int = 26;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EDEADLK: ::c_int = 35;
+pub const ENAMETOOLONG: ::c_int = 36;
+pub const ENOLCK: ::c_int = 37;
+pub const ENOSYS: ::c_int = 38;
+pub const ENOTEMPTY: ::c_int = 39;
+pub const ELOOP: ::c_int = 40;
+pub const EWOULDBLOCK: ::c_int = EAGAIN;
+pub const ENOMSG: ::c_int = 42;
+pub const EIDRM: ::c_int = 43;
+pub const ECHRNG: ::c_int = 44;
+pub const EL2NSYNC: ::c_int = 45;
+pub const EL3HLT: ::c_int = 46;
+pub const EL3RST: ::c_int = 47;
+pub const ELNRNG: ::c_int = 48;
+pub const EUNATCH: ::c_int = 49;
+pub const ENOCSI: ::c_int = 50;
+pub const EL2HLT: ::c_int = 51;
+pub const EBADE: ::c_int = 52;
+pub const EBADR: ::c_int = 53;
+pub const EXFULL: ::c_int = 54;
+pub const ENOANO: ::c_int = 55;
+pub const EBADRQC: ::c_int = 56;
+pub const EBADSLT: ::c_int = 57;
+pub const EDEADLOCK: ::c_int = EDEADLK;
+pub const EBFONT: ::c_int = 59;
+pub const ENOSTR: ::c_int = 60;
+pub const ENODATA: ::c_int = 61;
+pub const ETIME: ::c_int = 62;
+pub const ENOSR: ::c_int = 63;
+pub const ENONET: ::c_int = 64;
+pub const ENOPKG: ::c_int = 65;
+pub const EREMOTE: ::c_int = 66;
+pub const ENOLINK: ::c_int = 67;
+pub const EADV: ::c_int = 68;
+pub const ESRMNT: ::c_int = 69;
+pub const ECOMM: ::c_int = 70;
+pub const EPROTO: ::c_int = 71;
+pub const EMULTIHOP: ::c_int = 72;
+pub const EDOTDOT: ::c_int = 73;
+pub const EBADMSG: ::c_int = 74;
+pub const EOVERFLOW: ::c_int = 75;
+pub const ENOTUNIQ: ::c_int = 76;
+pub const EBADFD: ::c_int = 77;
+pub const EREMCHG: ::c_int = 78;
+pub const ELIBACC: ::c_int = 79;
+pub const ELIBBAD: ::c_int = 80;
+pub const ELIBSCN: ::c_int = 81;
+pub const ELIBMAX: ::c_int = 82;
+pub const ELIBEXEC: ::c_int = 83;
+pub const EILSEQ: ::c_int = 84;
+pub const ERESTART: ::c_int = 85;
+pub const ESTRPIPE: ::c_int = 86;
+pub const EUSERS: ::c_int = 87;
+pub const ENOTSOCK: ::c_int = 88;
+pub const EDESTADDRREQ: ::c_int = 89;
+pub const EMSGSIZE: ::c_int = 90;
+pub const EPROTOTYPE: ::c_int = 91;
+pub const ENOPROTOOPT: ::c_int = 92;
+pub const EPROTONOSUPPORT: ::c_int = 93;
+pub const ESOCKTNOSUPPORT: ::c_int = 94;
+pub const EOPNOTSUPP: ::c_int = 95;
+pub const EPFNOSUPPORT: ::c_int = 96;
+pub const EAFNOSUPPORT: ::c_int = 97;
+pub const EADDRINUSE: ::c_int = 98;
+pub const EADDRNOTAVAIL: ::c_int = 99;
+pub const ENETDOWN: ::c_int = 100;
+pub const ENETUNREACH: ::c_int = 101;
+pub const ENETRESET: ::c_int = 102;
+pub const ECONNABORTED: ::c_int = 103;
+pub const ECONNRESET: ::c_int = 104;
+pub const ENOBUFS: ::c_int = 105;
+pub const EISCONN: ::c_int = 106;
+pub const ENOTCONN: ::c_int = 107;
+pub const ESHUTDOWN: ::c_int = 108;
+pub const ETOOMANYREFS: ::c_int = 109;
+pub const ETIMEDOUT: ::c_int = 110;
+pub const ECONNREFUSED: ::c_int = 111;
+pub const EHOSTDOWN: ::c_int = 112;
+pub const EHOSTUNREACH: ::c_int = 113;
+pub const EALREADY: ::c_int = 114;
+pub const EINPROGRESS: ::c_int = 115;
+pub const ESTALE: ::c_int = 116;
+pub const EUCLEAN: ::c_int = 117;
+pub const ENOTNAM: ::c_int = 118;
+pub const ENAVAIL: ::c_int = 119;
+pub const EISNAM: ::c_int = 120;
+pub const EREMOTEIO: ::c_int = 121;
+pub const EDQUOT: ::c_int = 122;
+pub const ENOMEDIUM: ::c_int = 123;
+pub const EMEDIUMTYPE: ::c_int = 124;
+pub const ECANCELED: ::c_int = 125;
+pub const ENOKEY: ::c_int = 126;
+pub const EKEYEXPIRED: ::c_int = 127;
+pub const EKEYREVOKED: ::c_int = 128;
+pub const EKEYREJECTED: ::c_int = 129;
+pub const EOWNERDEAD: ::c_int = 130;
+pub const ENOTRECOVERABLE: ::c_int = 131;
+pub const ERFKILL: ::c_int = 132;
+pub const EHWPOISON: ::c_int = 133;
+
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+
+pub const F_DUPFD: ::c_int = 0;
+pub const F_GETFD: ::c_int = 1;
+pub const F_SETFD: ::c_int = 2;
+pub const F_GETFL: ::c_int = 3;
+pub const F_SETFL: ::c_int = 4;
+pub const F_GETOWN: ::c_int = 5;
+pub const F_SETOWN: ::c_int = 6;
+pub const F_GETLK: ::c_int = 7;
+pub const F_SETLK: ::c_int = 8;
+pub const F_SETLKW: ::c_int = 9;
+pub const F_RGETLK: ::c_int = 10;
+pub const F_RSETLK: ::c_int = 11;
+pub const F_CNVT: ::c_int = 12;
+pub const F_RSETLKW: ::c_int = 13;
+pub const F_DUPFD_CLOEXEC: ::c_int = 14;
+
+pub const FD_SETSIZE: usize = 1024;
+
+// Dummy
+pub const FIOCLEX: ::c_int = 0x5451;
+
+pub const FIONBIO: ::c_int = 0x8004667e;
+pub const FIONREAD: ::c_int = 0x4004667f;
+
+pub const IP_ADD_MEMBERSHIP: ::c_int = 3;
+pub const IP_DROP_MEMBERSHIP: ::c_int = 4;
+
+pub const IP_TOS: ::c_int = 1;
+pub const IP_TTL: ::c_int = 2;
+
+pub const IP_MULTICAST_TTL: ::c_int = 5;
+pub const IP_MULTICAST_IF: ::c_int = 6;
+pub const IP_MULTICAST_LOOP: ::c_int = 7;
+
+pub const IPV6_JOIN_GROUP: ::c_int = 12;
+pub const IPV6_ADD_MEMBERSHIP: ::c_int = 12;
+pub const IPV6_LEAVE_GROUP: ::c_int = 13;
+pub const IPV6_DROP_MEMBERSHIP: ::c_int = 13;
+pub const IPV6_V6ONLY: ::c_int = 27;
+
+// Dummy
+pub const IPV6_MULTICAST_LOOP: ::c_int = 7;
+
+pub const MSG_PEEK: ::c_int = 0x01;
+pub const MSG_WAITALL: ::c_int = 0x02;
+pub const MSG_OOB: ::c_int = 0x04;
+pub const MSG_DONTWAIT: ::c_int = 0x08;
+pub const MSG_MORE: ::c_int = 0x10;
+
+pub const O_ACCMODE: ::c_int = 3;
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_APPEND: ::c_int = 1024;
+pub const O_CREAT: ::c_int = 64;
+pub const O_EXCL: ::c_int = 128;
+pub const O_NOCTTY: ::c_int = 256;
+pub const O_NONBLOCK: ::c_int = 2048;
+pub const O_TRUNC: ::c_int = 512;
+pub const O_CLOEXEC: ::c_int = 524288;
+
+pub const POLLIN: ::c_short = 0x1;
+pub const POLLPRI: ::c_short = 0x2;
+pub const POLLOUT: ::c_short = 0x4;
+pub const POLLERR: ::c_short = 0x8;
+pub const POLLHUP: ::c_short = 0x10;
+pub const POLLNVAL: ::c_short = 0x20;
+
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = usize::max_value();
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = usize::max_value();
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = usize::max_value();
+
+pub const PTHREAD_MUTEX_NORMAL: ::c_int = 0;
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
+pub const PTHREAD_STACK_MIN: ::size_t = 0;
+
+// Dummy
+pub const RTLD_DEFAULT: *mut ::c_void = 0i64 as *mut ::c_void;
+
+pub const _SC_ARG_MAX: ::c_int = 0;
+pub const _SC_CHILD_MAX: ::c_int = 1;
+pub const _SC_CLK_TCK: ::c_int = 2;
+pub const _SC_NGROUPS_MAX: ::c_int = 3;
+pub const _SC_OPEN_MAX: ::c_int = 4;
+pub const _SC_JOB_CONTROL: ::c_int = 5;
+pub const _SC_SAVED_IDS: ::c_int = 6;
+pub const _SC_VERSION: ::c_int = 7;
+pub const _SC_PAGESIZE: ::c_int = 8;
+pub const _SC_PAGE_SIZE: ::c_int = _SC_PAGESIZE;
+pub const _SC_NPROCESSORS_CONF: ::c_int = 9;
+pub const _SC_NPROCESSORS_ONLN: ::c_int = 10;
+pub const _SC_PHYS_PAGES: ::c_int = 11;
+pub const _SC_AVPHYS_PAGES: ::c_int = 12;
+pub const _SC_MQ_OPEN_MAX: ::c_int = 13;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 14;
+pub const _SC_RTSIG_MAX: ::c_int = 15;
+pub const _SC_SEM_NSEMS_MAX: ::c_int = 16;
+pub const _SC_SEM_VALUE_MAX: ::c_int = 17;
+pub const _SC_SIGQUEUE_MAX: ::c_int = 18;
+pub const _SC_TIMER_MAX: ::c_int = 19;
+pub const _SC_TZNAME_MAX: ::c_int = 20;
+pub const _SC_ASYNCHRONOUS_IO: ::c_int = 21;
+pub const _SC_FSYNC: ::c_int = 22;
+pub const _SC_MAPPED_FILES: ::c_int = 23;
+pub const _SC_MEMLOCK: ::c_int = 24;
+pub const _SC_MEMLOCK_RANGE: ::c_int = 25;
+pub const _SC_MEMORY_PROTECTION: ::c_int = 26;
+pub const _SC_MESSAGE_PASSING: ::c_int = 27;
+pub const _SC_PRIORITIZED_IO: ::c_int = 28;
+pub const _SC_REALTIME_SIGNALS: ::c_int = 29;
+pub const _SC_SEMAPHORES: ::c_int = 30;
+pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 31;
+pub const _SC_SYNCHRONIZED_IO: ::c_int = 32;
+pub const _SC_TIMERS: ::c_int = 33;
+pub const _SC_AIO_LISTIO_MAX: ::c_int = 34;
+pub const _SC_AIO_MAX: ::c_int = 35;
+pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 36;
+pub const _SC_DELAYTIMER_MAX: ::c_int = 37;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 38;
+pub const _SC_THREAD_STACK_MIN: ::c_int = 39;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 40;
+pub const _SC_TTY_NAME_MAX: ::c_int = 41;
+pub const _SC_THREADS: ::c_int = 42;
+pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 43;
+pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 44;
+pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 45;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 46;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 47;
+pub const _SC_THREAD_PRIO_CEILING: ::c_int = _SC_THREAD_PRIO_PROTECT;
+pub const _SC_THREAD_PROCESS_SHARED: ::c_int = 48;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 49;
+pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 50;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 51;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 52;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 53;
+pub const _SC_ADVISORY_INFO: ::c_int = 54;
+pub const _SC_ATEXIT_MAX: ::c_int = 55;
+pub const _SC_BARRIERS: ::c_int = 56;
+pub const _SC_BC_BASE_MAX: ::c_int = 57;
+pub const _SC_BC_DIM_MAX: ::c_int = 58;
+pub const _SC_BC_SCALE_MAX: ::c_int = 59;
+pub const _SC_BC_STRING_MAX: ::c_int = 60;
+pub const _SC_CLOCK_SELECTION: ::c_int = 61;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 62;
+pub const _SC_CPUTIME: ::c_int = 63;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 64;
+pub const _SC_HOST_NAME_MAX: ::c_int = 65;
+pub const _SC_IOV_MAX: ::c_int = 66;
+pub const _SC_IPV6: ::c_int = 67;
+pub const _SC_LINE_MAX: ::c_int = 68;
+pub const _SC_MONOTONIC_CLOCK: ::c_int = 69;
+pub const _SC_RAW_SOCKETS: ::c_int = 70;
+pub const _SC_READER_WRITER_LOCKS: ::c_int = 71;
+pub const _SC_REGEXP: ::c_int = 72;
+pub const _SC_RE_DUP_MAX: ::c_int = 73;
+pub const _SC_SHELL: ::c_int = 74;
+pub const _SC_SPAWN: ::c_int = 75;
+pub const _SC_SPIN_LOCKS: ::c_int = 76;
+pub const _SC_SPORADIC_SERVER: ::c_int = 77;
+pub const _SC_SS_REPL_MAX: ::c_int = 78;
+pub const _SC_SYMLOOP_MAX: ::c_int = 79;
+pub const _SC_THREAD_CPUTIME: ::c_int = 80;
+pub const _SC_THREAD_SPORADIC_SERVER: ::c_int = 81;
+pub const _SC_TIMEOUTS: ::c_int = 82;
+pub const _SC_TRACE: ::c_int = 83;
+pub const _SC_TRACE_EVENT_FILTER: ::c_int = 84;
+pub const _SC_TRACE_EVENT_NAME_MAX: ::c_int = 85;
+pub const _SC_TRACE_INHERIT: ::c_int = 86;
+pub const _SC_TRACE_LOG: ::c_int = 87;
+pub const _SC_TRACE_NAME_MAX: ::c_int = 88;
+pub const _SC_TRACE_SYS_MAX: ::c_int = 89;
+pub const _SC_TRACE_USER_EVENT_MAX: ::c_int = 90;
+pub const _SC_TYPED_MEMORY_OBJECTS: ::c_int = 91;
+pub const _SC_V7_ILP32_OFF32: ::c_int = 92;
+pub const _SC_V6_ILP32_OFF32: ::c_int =_SC_V7_ILP32_OFF32;
+pub const _SC_XBS5_ILP32_OFF32: ::c_int = _SC_V7_ILP32_OFF32;
+pub const _SC_V7_ILP32_OFFBIG: ::c_int = 93;
+pub const _SC_V6_ILP32_OFFBIG: ::c_int = _SC_V7_ILP32_OFFBIG;
+pub const _SC_XBS5_ILP32_OFFBIG: ::c_int = _SC_V7_ILP32_OFFBIG;
+pub const _SC_V7_LP64_OFF64: ::c_int = 94;
+pub const _SC_V6_LP64_OFF64: ::c_int = _SC_V7_LP64_OFF64;
+pub const _SC_XBS5_LP64_OFF64: ::c_int = _SC_V7_LP64_OFF64;
+pub const _SC_V7_LPBIG_OFFBIG: ::c_int = 95;
+pub const _SC_V6_LPBIG_OFFBIG: ::c_int = _SC_V7_LPBIG_OFFBIG;
+pub const _SC_XBS5_LPBIG_OFFBIG: ::c_int = _SC_V7_LPBIG_OFFBIG;
+pub const _SC_XOPEN_CRYPT: ::c_int = 96;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 97;
+pub const _SC_XOPEN_LEGACY: ::c_int = 98;
+pub const _SC_XOPEN_REALTIME: ::c_int = 99;
+pub const _SC_STREAM_MAX: ::c_int = 100;
+pub const _SC_PRIORITY_SCHEDULING: ::c_int = 101;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 102;
+pub const _SC_XOPEN_SHM: ::c_int = 103;
+pub const _SC_XOPEN_STREAMS: ::c_int = 104;
+pub const _SC_XOPEN_UNIX: ::c_int = 105;
+pub const _SC_XOPEN_VERSION: ::c_int = 106;
+pub const _SC_2_CHAR_TERM: ::c_int = 107;
+pub const _SC_2_C_BIND: ::c_int = 108;
+pub const _SC_2_C_DEV: ::c_int = 109;
+pub const _SC_2_FORT_DEV: ::c_int = 110;
+pub const _SC_2_FORT_RUN: ::c_int = 111;
+pub const _SC_2_LOCALEDEF: ::c_int = 112;
+pub const _SC_2_PBS: ::c_int = 113;
+pub const _SC_2_PBS_ACCOUNTING: ::c_int = 114;
+pub const _SC_2_PBS_CHECKPOINT: ::c_int = 115;
+pub const _SC_2_PBS_LOCATE: ::c_int = 116;
+pub const _SC_2_PBS_MESSAGE: ::c_int = 117;
+pub const _SC_2_PBS_TRACK: ::c_int = 118;
+pub const _SC_2_SW_DEV: ::c_int = 119;
+pub const _SC_2_UPE: ::c_int = 120;
+pub const _SC_2_VERSION: ::c_int = 121;
+pub const _SC_THREAD_ROBUST_PRIO_INHERIT: ::c_int = 122;
+pub const _SC_THREAD_ROBUST_PRIO_PROTECT: ::c_int = 123;
+pub const _SC_XOPEN_UUCP: ::c_int = 124;
+pub const _SC_LEVEL1_ICACHE_SIZE: ::c_int = 125;
+pub const _SC_LEVEL1_ICACHE_ASSOC: ::c_int = 126;
+pub const _SC_LEVEL1_ICACHE_LINESIZE: ::c_int = 127;
+pub const _SC_LEVEL1_DCACHE_SIZE: ::c_int = 128;
+pub const _SC_LEVEL1_DCACHE_ASSOC: ::c_int = 129;
+pub const _SC_LEVEL1_DCACHE_LINESIZE: ::c_int = 130;
+pub const _SC_LEVEL2_CACHE_SIZE: ::c_int = 131;
+pub const _SC_LEVEL2_CACHE_ASSOC: ::c_int = 132;
+pub const _SC_LEVEL2_CACHE_LINESIZE: ::c_int = 133;
+pub const _SC_LEVEL3_CACHE_SIZE: ::c_int = 134;
+pub const _SC_LEVEL3_CACHE_ASSOC: ::c_int = 135;
+pub const _SC_LEVEL3_CACHE_LINESIZE: ::c_int = 136;
+pub const _SC_LEVEL4_CACHE_SIZE: ::c_int = 137;
+pub const _SC_LEVEL4_CACHE_ASSOC: ::c_int = 138;
+pub const _SC_LEVEL4_CACHE_LINESIZE: ::c_int = 139;
+
+pub const S_BLKSIZE: ::mode_t = 1024;
+pub const S_IREAD: ::mode_t = 256;
+pub const S_IWRITE: ::mode_t = 128;
+pub const S_IEXEC: ::mode_t = 64;
+pub const S_ENFMT: ::mode_t = 1024;
+pub const S_IFMT: ::mode_t = 61440;
+pub const S_IFDIR: ::mode_t = 16384;
+pub const S_IFCHR: ::mode_t = 8192;
+pub const S_IFBLK: ::mode_t = 24576;
+pub const S_IFREG: ::mode_t = 32768;
+pub const S_IFLNK: ::mode_t = 40960;
+pub const S_IFSOCK: ::mode_t = 49152;
+pub const S_IFIFO: ::mode_t = 4096;
+pub const S_IRUSR: ::mode_t = 256;
+pub const S_IWUSR: ::mode_t = 128;
+pub const S_IXUSR: ::mode_t = 64;
+pub const S_IRGRP: ::mode_t = 32;
+pub const S_IWGRP: ::mode_t = 16;
+pub const S_IXGRP: ::mode_t = 8;
+pub const S_IROTH: ::mode_t = 4;
+pub const S_IWOTH: ::mode_t = 2;
+pub const S_IXOTH: ::mode_t = 1;
+
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+
+pub const SHUT_RD: ::c_int = 0;
+pub const SHUT_WR: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+
+pub const SIG_SETMASK: ::c_int = 0;
+
+pub const SIGHUP: ::c_int = 1;
+pub const SIGINT: ::c_int = 2;
+pub const SIGQUIT: ::c_int = 3;
+pub const SIGILL: ::c_int = 4;
+pub const SIGABRT: ::c_int = 6;
+pub const SIGEMT: ::c_int = 7;
+pub const SIGFPE: ::c_int = 8;
+pub const SIGKILL: ::c_int = 9;
+pub const SIGSEGV: ::c_int = 11;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIGALRM: ::c_int = 14;
+pub const SIGTERM: ::c_int = 15;
+
+pub const SO_DEBUG: ::c_int = 0x0001;
+pub const SO_ACCEPTCONN: ::c_int = 0x0002;
+pub const SO_REUSEADDR: ::c_int = 0x0004;
+pub const SO_KEEPALIVE: ::c_int = 0x0008;
+pub const SO_DONTROUTE: ::c_int = 0x0010;
+pub const SO_BROADCAST: ::c_int = 0x0020;
+pub const SO_USELOOPBACK: ::c_int = 0x0040;
+pub const SO_LINGER: ::c_int = 0x0080;
+pub const SO_OOBINLINE: ::c_int = 0x0100;
+pub const SO_REUSEPORT: ::c_int = 0x0200;
+pub const SO_SNDBUF: ::c_int = 0x1001;
+pub const SO_RCVBUF: ::c_int = 0x1002;
+pub const SO_SNDLOWAT: ::c_int = 0x1003;
+pub const SO_RCVLOWAT: ::c_int = 0x1004;
+pub const SO_SNDTIMEO: ::c_int = 0x1005;
+pub const SO_RCVTIMEO: ::c_int = 0x1006;
+pub const SO_ERROR: ::c_int = 0x1007;
+pub const SO_TYPE: ::c_int = 0x1008;
+pub const SO_CONTIMEO: ::c_int = 0x1009;
+pub const SO_NO_CHECK: ::c_int = 0x100a;
+
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+pub const SOCK_RAW: ::c_int = 3;
+
+pub const SOL_SOCKET: ::c_int = 0xfff;
+
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const STDERR_FILENO: ::c_int = 2;
+
+pub const TCP_NODELAY: ::c_int = 0x01;
+pub const TCP_KEEPALIVE: ::c_int = 0x02;
+pub const TCP_KEEPIDLE: ::c_int = 0x03;
+pub const TCP_KEEPINTVL: ::c_int = 0x04;
+pub const TCP_KEEPCNT: ::c_int = 0x05;
+
+const ULONG_SIZE: usize = 64;
+
+pub const WNOHANG: ::c_int = 0x00000001;
+
+f! {
+    pub fn WEXITSTATUS(status: ::c_int) -> ::c_int {
+        (status >> 8) & 0xff
+    }
+
+    pub fn WIFEXITED(status: ::c_int) -> bool {
+        (status & 0xff) == 0
+    }
+
+    pub fn WTERMSIG(status: ::c_int) -> ::c_int {
+        status & 0x7f
+    }
+}
+
+extern {
+    pub fn bind(s: ::c_int, name: *const ::sockaddr, namelen: ::socklen_t) -> ::c_int;
+
+    pub fn clock_gettime(clock_id: ::clockid_t, tp: *mut ::timespec) -> ::c_int;
+
+    pub fn getpwuid_r(uid: ::uid_t, pwd: *mut passwd, buf: *mut ::c_char, buflen: ::size_t, result: *mut *mut passwd) -> ::c_int;
+
+    // Dummy
+    pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
+
+    pub fn memalign(align: ::size_t, nbytes: ::size_t) -> *mut ::c_void;
+
+    pub fn pthread_create(tid: *mut ::pthread_t, attr: *const ::pthread_attr_t, start: extern fn(*mut ::c_void) -> *mut ::c_void, arg: *mut ::c_void) -> ::c_int;
+
+    pub fn pthread_sigmask(how: ::c_int, set: *const ::sigset_t, oset: *mut ::sigset_t) -> ::c_int;
+
+    pub fn recvfrom(s: ::c_int, mem: *mut ::c_void, len: ::size_t, flags: ::c_int, from: *mut ::sockaddr, fromlen: *mut ::socklen_t) -> ::c_int;
+
+    pub fn setgroups(ngroups: ::c_int, grouplist: *const ::gid_t) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(target_arch = "aarch64")] {
+        mod aarch64;
+        pub use self::aarch64::*;
+    } else if #[cfg(target_arch = "x86_64")] {
+        mod x86_64;
+        pub use self::x86_64::*;
+    } else {
+        // Unknown target_arch
+    }
+}
diff --git a/src/unix/hermit/x86_64.rs b/src/unix/hermit/x86_64.rs
new file mode 100644
index 0000000000..76ec3ce823
--- /dev/null
+++ b/src/unix/hermit/x86_64.rs
@@ -0,0 +1,2 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 89cc1e3348..85e02c7a30 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -321,6 +321,11 @@ cfg_if! {
         #[link(name = "c")]
         #[link(name = "m")]
         extern {}
+    } else if #[cfg(target_os = "hermit")] {
+        // no_default_libraries is set to false for HermitCore, so only a link
+        // to "pthread" needs to be added.
+        #[link(name = "pthread")]
+        extern {}
     } else {
         #[link(name = "c")]
         #[link(name = "m")]
@@ -968,6 +973,9 @@ cfg_if! {
     } else if #[cfg(target_os = "haiku")] {
         mod haiku;
         pub use self::haiku::*;
+	} else if #[cfg(target_os = "hermit")] {
+        mod hermit;
+        pub use self::hermit::*;
     } else {
         // Unknown target_os
     }