libphobos: Add support for RISCV to glibc bindings

Backported from upstream druntime master.

Reviewed-on: https://github.com/dlang/druntime/pull/2355

From-SVN: r266713

18 files changed, 374 insertions, 6 deletions

diff --git a/libphobos/libdruntime/core/stdc/fenv.d b/libphobos/libdruntime/core/stdc/fenv.d
index 3bcbd65..00b99af 100644
--- a/libphobos/libdruntime/core/stdc/fenv.d
+++ b/libphobos/libdruntime/core/stdc/fenv.d
@@ -34,6 +34,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -128,6 +130,12 @@ version (GNUFP)
         alias fenv_t = double;
         alias fexcept_t = uint;
     }
+    // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/riscv/bits/fenv.h
+    else version (RISCV_Any)
+    {
+        alias fenv_t = uint;
+        alias fexcept_t = uint;
+    }
     // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/sparc/fpu/bits/fenv.h
     else version (SPARC64)
     {
@@ -573,6 +581,28 @@ else
             FE_DOWNWARD     = 3, ///
         }
     }
+    else version (RISCV_Any)
+    {
+        // Define bits representing exceptions in the FPSR status word.
+        enum
+        {
+            FE_INEXACT      = 0x01, ///
+            FE_UNDERFLOW    = 0x02, ///
+            FE_OVERFLOW     = 0x04, ///
+            FE_DIVBYZERO    = 0x08, ///
+            FE_INVALID      = 0x10, ///
+            FE_ALL_EXCEPT   = 0x1f, ///
+        }
+
+        // Define bits representing rounding modes in the FPCR Rmode field.
+        enum
+        {
+            FE_TONEAREST    = 0x0, ///
+            FE_TOWARDZERO   = 0x1, ///
+            FE_DOWNWARD     = 0x2, ///
+            FE_UPWARD       = 0x3, ///
+        }
+    }
     else version (SPARC_Any)
     {
         // Define bits representing the exception.
diff --git a/libphobos/libdruntime/core/stdc/math.d b/libphobos/libdruntime/core/stdc/math.d
index 8052ff7..b121f05 100644
--- a/libphobos/libdruntime/core/stdc/math.d
+++ b/libphobos/libdruntime/core/stdc/math.d
@@ -30,6 +30,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -159,6 +161,13 @@ else version (CRuntime_Glibc)
         ///
         enum int FP_ILOGBNAN      = int.max;
     }
+    else version (RISCV_Any)
+    {
+        ///
+        enum int FP_ILOGB0        = -int.max;
+        ///
+        enum int FP_ILOGBNAN      = int.max;
+    }
     else version (SPARC_Any)
     {
         ///
diff --git a/libphobos/libdruntime/core/sys/linux/dlfcn.d b/libphobos/libdruntime/core/sys/linux/dlfcn.d
index 26e5b40..4f0e662 100644
--- a/libphobos/libdruntime/core/sys/linux/dlfcn.d
+++ b/libphobos/libdruntime/core/sys/linux/dlfcn.d
@@ -16,6 +16,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -123,6 +125,30 @@ else version (ARM_Any)
         void _dl_mcount_wrapper_check(void* __selfpc);
     }
 }
+else version (RISCV_Any)
+{
+    // http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/dlfcn.h
+    // enum RTLD_LAZY = 0x0001; // POSIX
+    // enum RTLD_NOW = 0x0002; // POSIX
+    enum RTLD_BINDING_MASK = 0x3;
+    enum RTLD_NOLOAD = 0x00004;
+    enum RTLD_DEEPBIND = 0x00008;
+
+    // enum RTLD_GLOBAL = 0x00100; // POSIX
+    // enum RTLD_LOCAL = 0; // POSIX
+    enum RTLD_NODELETE = 0x01000;
+
+    static if (__USE_GNU)
+    {
+        RT DL_CALL_FCT(RT, Args...)(RT function(Args) fctp, auto ref Args args)
+        {
+            _dl_mcount_wrapper_check(cast(void*)fctp);
+            return fctp(args);
+        }
+
+        void _dl_mcount_wrapper_check(void* __selfpc);
+    }
+}
 else version (SPARC_Any)
 {
     // http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/dlfcn.h
diff --git a/libphobos/libdruntime/core/sys/linux/epoll.d b/libphobos/libdruntime/core/sys/linux/epoll.d
index e77cde4..c6ee220 100644
--- a/libphobos/libdruntime/core/sys/linux/epoll.d
+++ b/libphobos/libdruntime/core/sys/linux/epoll.d
@@ -21,6 +21,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -92,6 +94,14 @@ else version (MIPS_Any)
         epoll_data_t data;
     }
 }
+else version (RISCV_Any)
+{
+    struct epoll_event
+    {
+        uint events;
+        epoll_data_t data;
+    }
+}
 else version (SPARC_Any)
 {
     struct epoll_event
diff --git a/libphobos/libdruntime/core/sys/linux/link.d b/libphobos/libdruntime/core/sys/linux/link.d
index e22a445..3587ead 100644
--- a/libphobos/libdruntime/core/sys/linux/link.d
+++ b/libphobos/libdruntime/core/sys/linux/link.d
@@ -15,6 +15,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
 version (X86)     version = X86_Any;
@@ -50,6 +52,12 @@ else version (ARM_Any)
     alias __WORDSIZE __ELF_NATIVE_CLASS;
     alias uint32_t Elf_Symndx;
 }
+else version (RISCV_Any)
+{
+    // http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/elfclass.h
+    alias __WORDSIZE __ELF_NATIVE_CLASS;
+    alias uint32_t Elf_Symndx;
+}
 else version (SPARC_Any)
 {
     // http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/elfclass.h
diff --git a/libphobos/libdruntime/core/sys/linux/sys/eventfd.d b/libphobos/libdruntime/core/sys/linux/sys/eventfd.d
index 8e8f03a..83e7896 100644
--- a/libphobos/libdruntime/core/sys/linux/sys/eventfd.d
+++ b/libphobos/libdruntime/core/sys/linux/sys/eventfd.d
@@ -18,6 +18,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -64,6 +66,12 @@ else version (ARM_Any)
     enum EFD_CLOEXEC = 0x80000; // octal!2000000
     enum EFD_NONBLOCK = 0x800; // octal!4000
 }
+else version (RISCV_Any)
+{
+    enum EFD_SEMAPHORE = 1;
+    enum EFD_CLOEXEC = 0x80000; // octal!2000000
+    enum EFD_NONBLOCK = 0x800; // octal!4000
+}
 else version (SPARC_Any)
 {
     enum EFD_SEMAPHORE = 1;
diff --git a/libphobos/libdruntime/core/sys/linux/sys/inotify.d b/libphobos/libdruntime/core/sys/linux/sys/inotify.d
index 301376a..39d69a2 100644
--- a/libphobos/libdruntime/core/sys/linux/sys/inotify.d
+++ b/libphobos/libdruntime/core/sys/linux/sys/inotify.d
@@ -17,6 +17,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -86,6 +88,11 @@ else version (ARM_Any)
     enum IN_CLOEXEC = 0x80000; // octal!2000000
     enum IN_NONBLOCK = 0x800; // octal!4000
 }
+else version (RISCV_Any)
+{
+    enum IN_CLOEXEC = 0x80000; // octal!2000000
+    enum IN_NONBLOCK = 0x800; // octal!4000
+}
 else version (SPARC_Any)
 {
     enum IN_CLOEXEC = 0x80000; // octal!2000000
diff --git a/libphobos/libdruntime/core/sys/linux/sys/mman.d b/libphobos/libdruntime/core/sys/linux/sys/mman.d
index 5e30411..212943b 100644
--- a/libphobos/libdruntime/core/sys/linux/sys/mman.d
+++ b/libphobos/libdruntime/core/sys/linux/sys/mman.d
@@ -17,6 +17,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -53,6 +55,31 @@ version (PPC_Any)
     //     MCL_FUTURE = 0x4000,
     // }
 }
+// https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/riscv/bits/mman.h
+else version (RISCV_Any)
+{
+    static if (__USE_MISC) enum
+    {
+        MAP_GROWSDOWN = 0x00100,
+        MAP_DENYWRITE = 0x00800,
+        MAP_EXECUTABLE = 0x01000,
+        MAP_LOCKED = 0x02000,
+        MAP_NORESERVE = 0x04000,
+        MAP_POPULATE = 0x08000,
+        MAP_NONBLOCK = 0x10000,
+        MAP_STACK = 0x20000,
+        MAP_HUGETLB = 0x40000,
+        MAP_SYNC = 0x80000,
+        MAP_FIXED_NOREPLACE = 0x100000,
+    }
+
+    // in core.sys.posix.sys.mman
+    // enum
+    // {
+    //     MCL_CURRENT = 0x2000,
+    //     MCL_FUTURE = 0x4000,
+    // }
+}
 // http://sourceware.org/git/?p=glibc.git;a=blob;hb=51e945a8f950a6695754b11c1e6fba8bb750e100;f=sysdeps/unix/sysv/linux/s390/bits/mman.h
 else version (IBMZ_Any)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/dlfcn.d b/libphobos/libdruntime/core/sys/posix/dlfcn.d
index e1c3ba08..2378a33 100644
--- a/libphobos/libdruntime/core/sys/posix/dlfcn.d
+++ b/libphobos/libdruntime/core/sys/posix/dlfcn.d
@@ -31,6 +31,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -88,6 +90,13 @@ version (CRuntime_Glibc)
         enum RTLD_GLOBAL    = 0x00100;
         enum RTLD_LOCAL     = 0;
     }
+    else version (RISCV_Any)
+    {
+        enum RTLD_LAZY      = 0x00001;
+        enum RTLD_NOW       = 0x00002;
+        enum RTLD_GLOBAL    = 0x00100;
+        enum RTLD_LOCAL     = 0;
+    }
     else version (SPARC_Any)
     {
         enum RTLD_LAZY      = 0x00001;
diff --git a/libphobos/libdruntime/core/sys/posix/fcntl.d b/libphobos/libdruntime/core/sys/posix/fcntl.d
index 1bdc6ec..8f563ef 100644
--- a/libphobos/libdruntime/core/sys/posix/fcntl.d
+++ b/libphobos/libdruntime/core/sys/posix/fcntl.d
@@ -34,6 +34,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -191,6 +193,19 @@ version (CRuntime_Glibc)
         enum O_DSYNC        = 0x1000;   // octal   010000
         enum O_RSYNC        = O_SYNC;
     }
+    else version (RISCV_Any)
+    {
+        enum O_CREAT        = 0x40;     // octal     0100
+        enum O_EXCL         = 0x80;     // octal     0200
+        enum O_NOCTTY       = 0x100;    // octal     0400
+        enum O_TRUNC        = 0x200;    // octal    01000
+
+        enum O_APPEND       = 0x400;    // octal    02000
+        enum O_NONBLOCK     = 0x800;    // octal    04000
+        enum O_SYNC         = 0x101000; // octal 04010000
+        enum O_DSYNC        = 0x1000;   // octal   010000
+        enum O_RSYNC        = O_SYNC;
+    }
     else version (SPARC_Any)
     {
         enum O_CREAT        = 0x200;
diff --git a/libphobos/libdruntime/core/sys/posix/setjmp.d b/libphobos/libdruntime/core/sys/posix/setjmp.d
index c4be2b1..e8a3d1f 100644
--- a/libphobos/libdruntime/core/sys/posix/setjmp.d
+++ b/libphobos/libdruntime/core/sys/posix/setjmp.d
@@ -20,6 +20,9 @@ private import core.sys.posix.signal; // for sigset_t
 version (Posix):
 extern (C) nothrow @nogc:
 
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
+
 //
 // Required
 //
@@ -125,6 +128,17 @@ version (CRuntime_Glibc)
                 double[6] __fpregs;
         }
     }
+    else version (RISCV_Any)
+    {
+        struct __riscv_jmp_buf
+        {
+            c_long __pc;
+            c_long[12] __regs;
+            c_long __sp;
+            double[12] __fpregs;
+        }
+        alias __jmp_buf = __riscv_jmp_buf[1];
+    }
     else version (SystemZ)
     {
         struct __s390_jmp_buf
diff --git a/libphobos/libdruntime/core/sys/posix/signal.d b/libphobos/libdruntime/core/sys/posix/signal.d
index 2cd81c8..a592f6f 100644
--- a/libphobos/libdruntime/core/sys/posix/signal.d
+++ b/libphobos/libdruntime/core/sys/posix/signal.d
@@ -31,6 +31,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -328,6 +330,30 @@ version (linux)
         enum SIGUSR2    = 12;
         enum SIGURG     = 23;
     }
+    else version (RISCV_Any)
+    {
+        //SIGABRT (defined in core.stdc.signal)
+        enum SIGALRM    = 14;
+        enum SIGBUS     = 7;
+        enum SIGCHLD    = 17;
+        enum SIGCONT    = 18;
+        //SIGFPE (defined in core.stdc.signal)
+        enum SIGHUP     = 1;
+        //SIGILL (defined in core.stdc.signal)
+        //SIGINT (defined in core.stdc.signal)
+        enum SIGKILL    = 9;
+        enum SIGPIPE    = 13;
+        enum SIGQUIT    = 3;
+        //SIGSEGV (defined in core.stdc.signal)
+        enum SIGSTOP    = 19;
+        //SIGTERM (defined in core.stdc.signal)
+        enum SIGTSTP    = 20;
+        enum SIGTTIN    = 21;
+        enum SIGTTOU    = 22;
+        enum SIGUSR1    = 10;
+        enum SIGUSR2    = 12;
+        enum SIGURG     = 23;
+    }
     else version (SPARC_Any)
     {
         //SIGABRT (defined in core.stdc.signal)
@@ -2019,6 +2045,16 @@ version (CRuntime_Glibc)
         enum SIGXCPU    = 24;
         enum SIGXFSZ    = 25;
     }
+    else version (RISCV_Any)
+    {
+        enum SIGPOLL    = 29;
+        enum SIGPROF    = 27;
+        enum SIGSYS     = 31;
+        enum SIGTRAP    = 5;
+        enum SIGVTALRM  = 26;
+        enum SIGXCPU    = 24;
+        enum SIGXFSZ    = 25;
+    }
     else version (SPARC_Any)
     {
         enum SIGPOLL    = 23;
diff --git a/libphobos/libdruntime/core/sys/posix/sys/mman.d b/libphobos/libdruntime/core/sys/posix/sys/mman.d
index 0f534c5..c08ba009 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/mman.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/mman.d
@@ -34,6 +34,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -356,6 +358,8 @@ version (CRuntime_Glibc)
         enum MS_INVALIDATE = 2;
         enum MS_SYNC = 4;
     }
+    else version (RISCV_Any)
+        private enum DEFAULTS = true;
     else version (SPARC_Any)
         private enum DEFAULTS = true;
     else version (PPC_Any)
diff --git a/libphobos/libdruntime/core/sys/posix/sys/msg.d b/libphobos/libdruntime/core/sys/posix/sys/msg.d
index e57ee84..637df20 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/msg.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/msg.d
@@ -180,6 +180,51 @@ else version (PPC64)
         c_ulong   __glibc_reserved5;
     }
 }
+else version (RISCV32)
+{
+    // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/generic/bits/msq.h
+    alias c_ulong msgqnum_t;
+    alias c_ulong msglen_t;
+
+    struct msqid_ds
+    {
+        ipc_perm msg_perm;
+        c_ulong __glibc_reserved1;
+        time_t          msg_stime;
+        c_ulong __glibc_reserved2;
+        time_t          msg_rtime;
+        c_ulong __glibc_reserved3;
+        time_t          msg_ctime;
+        c_ulong         __msg_cbytes;
+        msgqnum_t       msg_qnum;
+        msglen_t        msg_qbytes;
+        pid_t           msg_lspid;
+        pid_t           msg_lrpid;
+        c_ulong __glibc_reserved4;
+        c_ulong __glibc_reserved5;
+    }
+}
+else version (RISCV64)
+{
+    // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/generic/bits/msq.h
+    alias c_ulong msgqnum_t;
+    alias c_ulong msglen_t;
+
+    struct msqid_ds
+    {
+        ipc_perm msg_perm;
+        time_t          msg_stime;
+        time_t          msg_rtime;
+        time_t          msg_ctime;
+        c_ulong         __msg_cbytes;
+        msgqnum_t       msg_qnum;
+        msglen_t        msg_qbytes;
+        pid_t           msg_lspid;
+        pid_t           msg_lrpid;
+        c_ulong __glibc_reserved4;
+        c_ulong __glibc_reserved5;
+    }
+}
 else version (S390)
 {
     // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/s390/bits/msq.h
diff --git a/libphobos/libdruntime/core/sys/posix/sys/socket.d b/libphobos/libdruntime/core/sys/posix/sys/socket.d
index db13bdf..3489a4a 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/socket.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/socket.d
@@ -33,6 +33,8 @@ version (MIPS32)  version = MIPS_Any;
 version (MIPS64)  version = MIPS_Any;
 version (PPC)     version = PPC_Any;
 version (PPC64)   version = PPC_Any;
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
 version (SPARC)   version = SPARC_Any;
 version (SPARC64) version = SPARC_Any;
@@ -391,6 +393,40 @@ version (CRuntime_Glibc)
             SO_TYPE         = 3
         }
     }
+    else version (RISCV_Any)
+    {
+        enum
+        {
+            SOCK_DGRAM      = 2,
+            SOCK_SEQPACKET  = 5,
+            SOCK_STREAM     = 1
+        }
+
+        enum
+        {
+            SOL_SOCKET      = 1
+        }
+
+        enum
+        {
+            SO_ACCEPTCONN   = 30,
+            SO_BROADCAST    = 6,
+            SO_DEBUG        = 1,
+            SO_DONTROUTE    = 5,
+            SO_ERROR        = 4,
+            SO_KEEPALIVE    = 9,
+            SO_LINGER       = 13,
+            SO_OOBINLINE    = 10,
+            SO_RCVBUF       = 8,
+            SO_RCVLOWAT     = 18,
+            SO_RCVTIMEO     = 20,
+            SO_REUSEADDR    = 2,
+            SO_SNDBUF       = 7,
+            SO_SNDLOWAT     = 19,
+            SO_SNDTIMEO     = 21,
+            SO_TYPE         = 3
+        }
+    }
     else version (SPARC_Any)
     {
         enum
diff --git a/libphobos/libdruntime/core/sys/posix/sys/stat.d b/libphobos/libdruntime/core/sys/posix/sys/stat.d
index 7a05e52..512f48a 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/stat.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/stat.d
@@ -28,6 +28,9 @@ else version (TVOS)
 else version (WatchOS)
     version = Darwin;
 
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
+
 version (Posix):
 extern (C) nothrow @nogc:
 
@@ -353,6 +356,30 @@ version (CRuntime_Glibc)
             c_ulong     __unused6;
         }
     }
+    else version (RISCV_Any)
+    {
+        struct stat_t
+        {
+            dev_t       st_dev;
+            ino_t       st_ino;
+            mode_t      st_mode;
+            nlink_t     st_nlink;
+            uid_t       st_uid;
+            gid_t       st_gid;
+            dev_t       st_rdev;
+            dev_t       __pad1;
+            off_t       st_size;
+            blksize_t   st_blksize;
+            int         __pad2;
+            time_t      st_atime;
+            c_ulong     st_atime_nsec;
+            time_t      st_mtime;
+            c_ulong     st_mtime_nsec;
+            time_t      st_ctime;
+            c_ulong     st_ctime_nsec;
+            int[2]      __reserved;
+        }
+    }
     else version (ARM)
     {
         private
diff --git a/libphobos/libdruntime/core/sys/posix/ucontext.d b/libphobos/libdruntime/core/sys/posix/ucontext.d
index 7aef961..964b77c 100644
--- a/libphobos/libdruntime/core/sys/posix/ucontext.d
+++ b/libphobos/libdruntime/core/sys/posix/ucontext.d
@@ -23,6 +23,9 @@ extern (C):
 nothrow:
 @nogc:
 
+version (RISCV32) version = RISCV_Any;
+version (RISCV64) version = RISCV_Any;
+
 //
 // XOpen (XSI)
 //
@@ -542,6 +545,55 @@ version (CRuntime_Glibc)
             mcontext_t  uc_mcontext;
         }
     }
+    else version (RISCV_Any)
+    {
+        private
+        {
+            alias c_ulong[32] __riscv_mc_gp_state;
+
+            struct __riscv_mc_f_ext_state
+            {
+                uint[32] __f;
+                uint __fcsr;
+            }
+
+            struct __riscv_mc_d_ext_state
+            {
+                ulong[32] __f;
+                uint __fcsr;
+            }
+
+            struct __riscv_mc_q_ext_state
+            {
+                align(16) ulong[64] __f;
+                uint __fcsr;
+                uint[3] __reserved;
+            }
+
+            union __riscv_mc_fp_state
+            {
+                __riscv_mc_f_ext_state __f;
+                __riscv_mc_d_ext_state __d;
+                __riscv_mc_q_ext_state __q;
+            }
+        }
+
+        struct mcontext_t
+        {
+            __riscv_mc_gp_state __gregs;
+            __riscv_mc_fp_state __fpregs;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     __uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            sigset_t    uc_sigmask;
+            char[1024 / 8 - sigset_t.sizeof] __reserved;
+            mcontext_t  uc_mcontext;
+        }
+    }
     else version (SPARC64)
     {
         enum MC_NGREG = 19;
diff --git a/libphobos/libdruntime/rt/sections_elf_shared.d b/libphobos/libdruntime/rt/sections_elf_shared.d
index 329b60b..b392eb1 100644
--- a/libphobos/libdruntime/rt/sections_elf_shared.d
+++ b/libphobos/libdruntime/rt/sections_elf_shared.d
@@ -965,19 +965,24 @@ extern(C) void* __tls_get_addr(tls_index* ti) nothrow @nogc;
  * each TLS block. This is at least true for PowerPC and Mips platforms.
  * See: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/powerpc/dl-tls.h;h=f7cf6f96ebfb505abfd2f02be0ad0e833107c0cd;hb=HEAD#l34
  *      https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/mips/dl-tls.h;h=93a6dc050cb144b9f68b96fb3199c60f5b1fcd18;hb=HEAD#l32
+ *      https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/riscv/dl-tls.h;h=ab2d860314de94c18812bc894ff6b3f55368f20f;hb=HEAD#l32
  */
 version (X86)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
 else version (X86_64)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
 else version (ARM)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
 else version (AArch64)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
+else version (RISCV32)
+    enum TLS_DTV_OFFSET = 0x800;
+else version (RISCV64)
+    enum TLS_DTV_OFFSET = 0x800;
 else version (SPARC)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
 else version (SPARC64)
-    enum TLS_DTV_OFFSET = 0x;
+    enum TLS_DTV_OFFSET = 0x0;
 else version (PPC)
     enum TLS_DTV_OFFSET = 0x8000;
 else version (PPC64)