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authorWaldemar Brodkorb <wbrodkorb@conet.de>2018-05-30 23:04:17 (GMT)
committerWaldemar Brodkorb <wbrodkorb@conet.de>2018-06-10 04:35:18 (GMT)
commit9595fb8cd595028bece5174e7eddf660ae3dcc10 (patch)
tree56ffac7a96d15a2a9c825a4f96c3f1bcea7c4fa0 /libc/sysdeps/linux
parentdf8caec1978cb5fe7d9a7e7ea9dd773605e89032 (diff)
risc-v: initial 64 bit port, static only (no TLS/NPTL)
Only a simple hello world is tested in qemu system emulation.
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/common/rename.c6
-rw-r--r--libc/sysdeps/linux/riscv64/Makefile6
-rw-r--r--libc/sysdeps/linux/riscv64/Makefile.arch2
-rw-r--r--libc/sysdeps/linux/riscv64/__longjmp.S57
-rw-r--r--libc/sysdeps/linux/riscv64/__syscall_error.c18
-rw-r--r--libc/sysdeps/linux/riscv64/bits/endian.h5
-rw-r--r--libc/sysdeps/linux/riscv64/bits/fcntl.h228
-rw-r--r--libc/sysdeps/linux/riscv64/bits/fenv.h73
-rw-r--r--libc/sysdeps/linux/riscv64/bits/kernel_types.h42
-rw-r--r--libc/sysdeps/linux/riscv64/bits/mman.h37
-rw-r--r--libc/sysdeps/linux/riscv64/bits/setjmp.h38
-rw-r--r--libc/sysdeps/linux/riscv64/bits/shm.h90
-rw-r--r--libc/sysdeps/linux/riscv64/bits/sigcontext.h32
-rw-r--r--libc/sysdeps/linux/riscv64/bits/stackinfo.h11
-rw-r--r--libc/sysdeps/linux/riscv64/bits/syscalls.h85
-rw-r--r--libc/sysdeps/linux/riscv64/bits/uClibc_arch_features.h39
-rw-r--r--libc/sysdeps/linux/riscv64/bits/wordsize.h29
-rw-r--r--libc/sysdeps/linux/riscv64/bsd-_setjmp.c1
-rw-r--r--libc/sysdeps/linux/riscv64/bsd-setjmp.c1
-rw-r--r--libc/sysdeps/linux/riscv64/clone.S80
-rw-r--r--libc/sysdeps/linux/riscv64/crt1.S83
-rw-r--r--libc/sysdeps/linux/riscv64/crti.S17
-rw-r--r--libc/sysdeps/linux/riscv64/crtn.S13
-rw-r--r--libc/sysdeps/linux/riscv64/getcontext.S74
-rw-r--r--libc/sysdeps/linux/riscv64/jmpbuf-offsets.h23
-rw-r--r--libc/sysdeps/linux/riscv64/jmpbuf-unwind.h46
-rw-r--r--libc/sysdeps/linux/riscv64/setcontext.S112
-rw-r--r--libc/sysdeps/linux/riscv64/setjmp.S73
-rw-r--r--libc/sysdeps/linux/riscv64/swapcontext.S122
-rw-r--r--libc/sysdeps/linux/riscv64/sys/asm.h63
-rw-r--r--libc/sysdeps/linux/riscv64/sys/procfs.h114
-rw-r--r--libc/sysdeps/linux/riscv64/sys/ucontext.h106
-rw-r--r--libc/sysdeps/linux/riscv64/sys/user.h1
-rw-r--r--libc/sysdeps/linux/riscv64/sysdep.h125
-rw-r--r--libc/sysdeps/linux/riscv64/vfork.S42
35 files changed, 1894 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/rename.c b/libc/sysdeps/linux/common/rename.c
index 260347f..30a4ed7 100644
--- a/libc/sysdeps/linux/common/rename.c
+++ b/libc/sysdeps/linux/common/rename.c
@@ -16,6 +16,12 @@ int rename(const char *oldpath, const char *newpath)
{
return renameat(AT_FDCWD, oldpath, AT_FDCWD, newpath);
}
+#elif defined __NR_renameat2
+# include <fcntl.h>
+int rename(const char *oldpath, const char *newpath)
+{
+ _syscall2(int, renameat2, const char *, oldpath, const char *, newpath)
+}
#else
_syscall2(int, rename, const char *, oldpath, const char *, newpath)
#endif
diff --git a/libc/sysdeps/linux/riscv64/Makefile b/libc/sysdeps/linux/riscv64/Makefile
new file mode 100644
index 0000000..43dc60a
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/Makefile
@@ -0,0 +1,6 @@
+top_srcdir=../../../../
+top_builddir=../../../../
+all: objs
+include $(top_builddir)Rules.mak
+include Makefile.arch
+include $(top_srcdir)Makerules
diff --git a/libc/sysdeps/linux/riscv64/Makefile.arch b/libc/sysdeps/linux/riscv64/Makefile.arch
new file mode 100644
index 0000000..74c0748
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/Makefile.arch
@@ -0,0 +1,2 @@
+CSRC-y := __syscall_error.c
+SSRC-y := __longjmp.S setjmp.S vfork.S clone.S
diff --git a/libc/sysdeps/linux/riscv64/__longjmp.S b/libc/sysdeps/linux/riscv64/__longjmp.S
new file mode 100644
index 0000000..6079f98
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/__longjmp.S
@@ -0,0 +1,57 @@
+/* longjmp, RISC-V version.
+ Copyright (C) 1996-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+ENTRY (__longjmp)
+ REG_L ra, 0*SZREG(a0)
+ REG_L s0, 1*SZREG(a0)
+ REG_L s1, 2*SZREG(a0)
+ REG_L s2, 3*SZREG(a0)
+ REG_L s3, 4*SZREG(a0)
+ REG_L s4, 5*SZREG(a0)
+ REG_L s5, 6*SZREG(a0)
+ REG_L s6, 7*SZREG(a0)
+ REG_L s7, 8*SZREG(a0)
+ REG_L s8, 9*SZREG(a0)
+ REG_L s9, 10*SZREG(a0)
+ REG_L s10,11*SZREG(a0)
+ REG_L s11,12*SZREG(a0)
+ REG_L sp, 13*SZREG(a0)
+
+#ifndef __riscv_float_abi_soft
+ FREG_L fs0, 14*SZREG+ 0*SZFREG(a0)
+ FREG_L fs1, 14*SZREG+ 1*SZFREG(a0)
+ FREG_L fs2, 14*SZREG+ 2*SZFREG(a0)
+ FREG_L fs3, 14*SZREG+ 3*SZFREG(a0)
+ FREG_L fs4, 14*SZREG+ 4*SZFREG(a0)
+ FREG_L fs5, 14*SZREG+ 5*SZFREG(a0)
+ FREG_L fs6, 14*SZREG+ 6*SZFREG(a0)
+ FREG_L fs7, 14*SZREG+ 7*SZFREG(a0)
+ FREG_L fs8, 14*SZREG+ 8*SZFREG(a0)
+ FREG_L fs9, 14*SZREG+ 9*SZFREG(a0)
+ FREG_L fs10,14*SZREG+10*SZFREG(a0)
+ FREG_L fs11,14*SZREG+11*SZFREG(a0)
+#endif
+
+ seqz a0, a1
+ add a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
+ ret
+
+END (__longjmp)
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/riscv64/__syscall_error.c b/libc/sysdeps/linux/riscv64/__syscall_error.c
new file mode 100644
index 0000000..2b642e8
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/__syscall_error.c
@@ -0,0 +1,18 @@
+/* Wrapper for setting errno.
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <errno.h>
+#include <features.h>
+
+/* This routine is jumped to by all the syscall handlers, to stash
+ * an error number into errno. */
+int __syscall_error(int err_no) attribute_hidden;
+int __syscall_error(int err_no)
+{
+ __set_errno(-err_no);
+ return -1;
+}
diff --git a/libc/sysdeps/linux/riscv64/bits/endian.h b/libc/sysdeps/linux/riscv64/bits/endian.h
new file mode 100644
index 0000000..4aaf559
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/endian.h
@@ -0,0 +1,5 @@
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/libc/sysdeps/linux/riscv64/bits/fcntl.h b/libc/sysdeps/linux/riscv64/bits/fcntl.h
new file mode 100644
index 0000000..a08bbf5
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/fcntl.h
@@ -0,0 +1,228 @@
+/* O_*, F_*, FD_* bit values for Linux.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file
+ * COPYING.LIB in this tarball.
+ */
+
+#ifndef _FCNTL_H
+# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+#include <sys/types.h>
+#ifdef __USE_GNU
+# include <bits/uio.h>
+#endif
+
+/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
+ located on an ext2 file system */
+#define O_ACCMODE 00000003
+#define O_RDONLY 00000000
+#define O_WRONLY 00000001
+#define O_RDWR 00000002
+#define O_CREAT 00000100 /* not fcntl */
+#define O_EXCL 00000200 /* not fcntl */
+#define O_NOCTTY 00000400 /* not fcntl */
+#define O_TRUNC 00001000 /* not fcntl */
+#define O_APPEND 00002000
+#define O_NONBLOCK 00004000
+#define O_NDELAY O_NONBLOCK
+#define O_SYNC 00010000
+#define O_FSYNC O_SYNC
+#define O_ASYNC 00020000
+
+#ifdef __USE_XOPEN2K8
+# define O_DIRECTORY 00200000 /* Must be a directory. */
+# define O_NOFOLLOW 00400000 /* Do not follow links. */
+# define O_CLOEXEC 02000000 /* Set close_on_exec. */
+#endif
+
+#ifdef __USE_GNU
+# define O_DIRECT 00040000 /* Direct disk access. */
+# define O_NOATIME 01000000 /* Do not set atime. */
+# define O_PATH 010000000 /* Resolve pathname but do not open file. */
+#endif
+
+#ifdef __USE_LARGEFILE64
+# define O_LARGEFILE 00100000
+#endif
+
+/* For now Linux has synchronisity options for data and read operations.
+ We define the symbols here but let them do the same as O_SYNC since
+ this is a superset. */
+#if defined __USE_POSIX199309 || defined __USE_UNIX98
+# define O_DSYNC O_SYNC /* Synchronize data. */
+# define O_RSYNC O_SYNC /* Synchronize read operations. */
+#endif
+
+/* Values for the second argument to `fcntl'. */
+#define F_DUPFD 0 /* Duplicate file descriptor. */
+#define F_GETFD 1 /* Get file descriptor flags. */
+#define F_SETFD 2 /* Set file descriptor flags. */
+#define F_GETFL 3 /* Get file status flags. */
+#define F_SETFL 4 /* Set file status flags. */
+
+#ifndef __USE_FILE_OFFSET64
+# define F_GETLK 5 /* Get record locking info. */
+# define F_SETLK 6 /* Set record locking info (non-blocking). */
+# define F_SETLKW 7 /* Set record locking info (blocking). */
+#else
+# define F_GETLK F_GETLK64 /* Get record locking info. */
+# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
+# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
+#endif
+#define F_GETLK64 12 /* Get record locking info. */
+#define F_SETLK64 13 /* Set record locking info (non-blocking). */
+#define F_SETLKW64 14 /* Set record locking info (blocking). */
+
+#if defined __USE_BSD || defined __USE_XOPEN2K
+# define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
+# define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETSIG 10 /* Set number of signal to be sent. */
+# define F_GETSIG 11 /* Get number of signal to be sent. */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETLEASE 1024 /* Set a lease. */
+# define F_GETLEASE 1025 /* Enquire what lease is active. */
+# define F_NOTIFY 1026 /* Request notfications on a directory. */
+# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
+ close-on-exit set on new fd. */
+# define F_SETPIPE_SZ 1031 /* Set pipe page size array. */
+# define F_GETPIPE_SZ 1032 /* Get pipe page size array. */
+#endif
+
+/* For F_[GET|SET]FL. */
+#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
+
+/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
+#define F_RDLCK 0 /* Read lock. */
+#define F_WRLCK 1 /* Write lock. */
+#define F_UNLCK 2 /* Remove lock. */
+
+/* For old implementation of bsd flock(). */
+#define F_EXLCK 4 /* or 3 */
+#define F_SHLCK 8 /* or 4 */
+
+#ifdef __USE_BSD
+/* Operations for bsd flock(), also used by the kernel implementation. */
+# define LOCK_SH 1 /* shared lock */
+# define LOCK_EX 2 /* exclusive lock */
+# define LOCK_NB 4 /* or'd with one of the above to prevent
+ blocking */
+# define LOCK_UN 8 /* remove lock */
+#endif
+
+#ifdef __USE_GNU
+# define LOCK_MAND 32 /* This is a mandatory flock: */
+# define LOCK_READ 64 /* ... which allows concurrent read operations. */
+# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
+# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
+#endif
+
+#ifdef __USE_GNU
+/* Types of directory notifications that may be requested with F_NOTIFY. */
+# define DN_ACCESS 0x00000001 /* File accessed. */
+# define DN_MODIFY 0x00000002 /* File modified. */
+# define DN_CREATE 0x00000004 /* File created. */
+# define DN_DELETE 0x00000008 /* File removed. */
+# define DN_RENAME 0x00000010 /* File renamed. */
+# define DN_ATTRIB 0x00000020 /* File changed attibutes. */
+# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
+#endif
+
+struct flock
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+#ifndef __USE_FILE_OFFSET64
+ __off_t l_start; /* Offset where the lock begins. */
+ __off_t l_len; /* Size of the locked area; zero means until EOF. */
+#else
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+#endif
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+
+#ifdef __USE_LARGEFILE64
+struct flock64
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+#endif
+
+/* Define some more compatibility macros to be backward compatible with
+ BSD systems which did not managed to hide these kernel macros. */
+#ifdef __USE_BSD
+# define FAPPEND O_APPEND
+# define FFSYNC O_FSYNC
+# define FASYNC O_ASYNC
+# define FNONBLOCK O_NONBLOCK
+# define FNDELAY O_NDELAY
+#endif /* Use BSD. */
+
+/* Advise to `posix_fadvise'. */
+#ifdef __USE_XOPEN2K
+# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
+# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
+# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
+# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
+# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
+# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
+#endif
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+/* Flags for SYNC_FILE_RANGE. */
+# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
+ in the range before performing the
+ write. */
+# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
+ dirty pages in the range which are
+ not presently under writeback. */
+# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
+ the range after performing the
+ write. */
+
+/* Flags for SPLICE and VMSPLICE. */
+# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
+# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
+ (but we may still block on the fd
+ we splice from/to). */
+# define SPLICE_F_MORE 4 /* Expect more data. */
+# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
+#endif
+
+__BEGIN_DECLS
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+
+/* Provide kernel hint to read ahead. */
+extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
+ __THROW;
+
+/* Selective file content synch'ing. */
+extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
+ unsigned int __flags);
+
+/* Splice address range into a pipe. */
+extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
+ size_t __count, unsigned int __flags);
+
+/* Splice two files together. */
+extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
+ __off64_t *__offout, size_t __len,
+ unsigned int __flags);
+
+/* In-kernel implementation of tee for pipe buffers. */
+extern ssize_t tee (int __fdin, int __fdout, size_t __len,
+ unsigned int __flags);
+
+#endif
+__END_DECLS
diff --git a/libc/sysdeps/linux/riscv64/bits/fenv.h b/libc/sysdeps/linux/riscv64/bits/fenv.h
new file mode 100644
index 0000000..a3f8031
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/fenv.h
@@ -0,0 +1,73 @@
+/* Floating point environment, RISC-V version.
+ Copyright (C) 1998-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+enum
+ {
+ FE_INEXACT =
+#define FE_INEXACT (0x01)
+ FE_INEXACT,
+ FE_UNDERFLOW =
+#define FE_UNDERFLOW (0x02)
+ FE_UNDERFLOW,
+ FE_OVERFLOW =
+#define FE_OVERFLOW (0x04)
+ FE_OVERFLOW,
+ FE_DIVBYZERO =
+#define FE_DIVBYZERO (0x08)
+ FE_DIVBYZERO,
+ FE_INVALID =
+#define FE_INVALID (0x10)
+ FE_INVALID
+ };
+
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+enum
+ {
+ FE_TONEAREST =
+#define FE_TONEAREST (0x0)
+ FE_TONEAREST,
+ FE_TOWARDZERO =
+#define FE_TOWARDZERO (0x1)
+ FE_TOWARDZERO,
+ FE_DOWNWARD =
+#define FE_DOWNWARD (0x2)
+ FE_DOWNWARD,
+ FE_UPWARD =
+#define FE_UPWARD (0x3)
+ FE_UPWARD
+ };
+
+
+typedef unsigned int fexcept_t;
+typedef unsigned int fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((__const fenv_t *) -1)
+
+#if __GLIBC_USE (IEC_60559_BFP_EXT)
+/* Type representing floating-point control modes. */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes. */
+# define FE_DFL_MODE ((const femode_t *) -1L)
+#endif
diff --git a/libc/sysdeps/linux/riscv64/bits/kernel_types.h b/libc/sysdeps/linux/riscv64/bits/kernel_types.h
new file mode 100644
index 0000000..832b176
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/kernel_types.h
@@ -0,0 +1,42 @@
+/* Note that we use the exact same include guard #define names
+ * as asm/posix_types.h. This will avoid gratuitous conflicts
+ * with the posix_types.h kernel header, and will ensure that
+ * our private content, and not the kernel header, will win.
+ * -Erik
+ */
+#ifndef __ASM_GENERIC_POSIX_TYPES_H
+#define __ASM_GENERIC_POSIX_TYPES_H
+
+typedef unsigned long __kernel_dev_t;
+typedef unsigned long __kernel_ino_t;
+typedef unsigned int __kernel_mode_t;
+typedef unsigned int __kernel_nlink_t;
+typedef long __kernel_off_t;
+typedef int __kernel_pid_t;
+typedef int __kernel_ipc_pid_t;
+typedef unsigned int __kernel_uid_t;
+typedef unsigned int __kernel_gid_t;
+typedef unsigned long __kernel_size_t;
+typedef long __kernel_ssize_t;
+typedef long __kernel_ptrdiff_t;
+typedef long __kernel_time_t;
+typedef long __kernel_suseconds_t;
+typedef long __kernel_clock_t;
+typedef int __kernel_daddr_t;
+typedef char * __kernel_caddr_t;
+typedef unsigned short __kernel_uid16_t;
+typedef unsigned short __kernel_gid16_t;
+typedef unsigned int __kernel_uid32_t;
+typedef unsigned int __kernel_gid32_t;
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+typedef long long __kernel_loff_t;
+typedef unsigned int __kernel_old_dev_t;
+typedef long __kernel_long_t;
+typedef unsigned long __kernel_ulong_t;
+
+typedef struct {
+ int val[2];
+} __kernel_fsid_t;
+
+#endif /* __ASM_GENERIC_POSIX_TYPES_H */
diff --git a/libc/sysdeps/linux/riscv64/bits/mman.h b/libc/sysdeps/linux/riscv64/bits/mman.h
new file mode 100644
index 0000000..316f87d
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/mman.h
@@ -0,0 +1,37 @@
+/* Definitions for POSIX memory map interface. Linux/RISC-V version.
+ Copyright (C) 1997-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_MMAN_H
+# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
+#endif
+
+#ifdef __USE_MISC
+# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
+# define MAP_DENYWRITE 0x00800 /* ETXTBSY. */
+# define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
+# define MAP_LOCKED 0x02000 /* Lock the mapping. */
+# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
+# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
+# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
+# define MAP_STACK 0x20000 /* Allocation is for a stack. */
+# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
+# define MAP_SYNC 0x80000 /* Perform synchronous page
+ faults for the mapping. */
+#endif
+
+/* Include generic Linux declarations. */
+#include <bits/mman-linux.h>
diff --git a/libc/sysdeps/linux/riscv64/bits/setjmp.h b/libc/sysdeps/linux/riscv64/bits/setjmp.h
new file mode 100644
index 0000000..c45f939
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/setjmp.h
@@ -0,0 +1,38 @@
+/* Define the machine-dependent type `jmp_buf'. RISC-V version.
+ Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _RISCV_BITS_SETJMP_H
+#define _RISCV_BITS_SETJMP_H
+
+typedef struct __jmp_buf_internal_tag
+ {
+ /* Program counter. */
+ long int __pc;
+ /* Callee-saved registers. */
+ long int __regs[12];
+ /* Stack pointer. */
+ long int __sp;
+
+ /* Callee-saved floating point registers. */
+#if defined __riscv_float_abi_double
+ double __fpregs[12];
+#elif !defined __riscv_float_abi_soft
+# error unsupported FLEN
+#endif
+ } __jmp_buf[1];
+
+#endif /* _RISCV_BITS_SETJMP_H */
diff --git a/libc/sysdeps/linux/riscv64/bits/shm.h b/libc/sysdeps/linux/riscv64/bits/shm.h
new file mode 100644
index 0000000..dbe4851
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/shm.h
@@ -0,0 +1,90 @@
+/*
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
+ * in this tarball.
+ */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
+#endif
+
+#include <bits/types.h>
+
+/* Permission flag for shmget. */
+#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
+#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
+
+/* Flags for `shmat'. */
+#define SHM_RDONLY 010000 /* attach read-only else read-write */
+#define SHM_RND 020000 /* round attach address to SHMLBA */
+#define SHM_REMAP 040000 /* take-over region on attach */
+
+/* Commands for `shmctl'. */
+#define SHM_LOCK 11 /* lock segment (root only) */
+#define SHM_UNLOCK 12 /* unlock segment (root only) */
+
+__BEGIN_DECLS
+
+/* Segment low boundary address multiple. */
+#define SHMLBA (__getpagesize () << 2)
+extern int __getpagesize (void) __THROW __attribute__ ((__const__));
+
+
+/* Type to count number of attaches. */
+typedef unsigned long int shmatt_t;
+
+/* Data structure describing a set of semaphores. */
+struct shmid_ds
+ {
+ struct ipc_perm shm_perm; /* operation permission struct */
+ size_t shm_segsz; /* size of segment in bytes */
+ __time_t shm_atime; /* time of last shmat() */
+ unsigned long int __unused1;
+ __time_t shm_dtime; /* time of last shmdt() */
+ unsigned long int __unused2;
+ __time_t shm_ctime; /* time of last change by shmctl() */
+ unsigned long int __unused3;
+ __pid_t shm_cpid; /* pid of creator */
+ __pid_t shm_lpid; /* pid of last shmop */
+ shmatt_t shm_nattch; /* number of current attaches */
+ unsigned long int __unused4;
+ unsigned long int __unused5;
+ };
+
+#ifdef __USE_MISC
+
+/* ipcs ctl commands */
+# define SHM_STAT 13
+# define SHM_INFO 14
+
+/* shm_mode upper byte flags */
+# define SHM_DEST 01000 /* segment will be destroyed on last detach */
+# define SHM_LOCKED 02000 /* segment will not be swapped */
+# define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
+# define SHM_NORESERVE 010000 /* don't check for reservations */
+
+struct shminfo
+ {
+ unsigned long int shmmax;
+ unsigned long int shmmin;
+ unsigned long int shmmni;
+ unsigned long int shmseg;
+ unsigned long int shmall;
+ unsigned long int __unused1;
+ unsigned long int __unused2;
+ unsigned long int __unused3;
+ unsigned long int __unused4;
+ };
+
+struct shm_info
+ {
+ int used_ids;
+ unsigned long int shm_tot; /* total allocated shm */
+ unsigned long int shm_rss; /* total resident shm */
+ unsigned long int shm_swp; /* total swapped shm */
+ unsigned long int swap_attempts;
+ unsigned long int swap_successes;
+ };
+
+#endif /* __USE_MISC */
+
+__END_DECLS
diff --git a/libc/sysdeps/linux/riscv64/bits/sigcontext.h b/libc/sysdeps/linux/riscv64/bits/sigcontext.h
new file mode 100644
index 0000000..9b896a6
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/sigcontext.h
@@ -0,0 +1,32 @@
+/* Machine-dependent signal context structure for Linux. RISC-V version.
+ Copyright (C) 1996-2018 Free Software
+ Foundation, Inc. This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_SIGCONTEXT_H
+#define _BITS_SIGCONTEXT_H 1
+
+#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
+# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
+#endif
+
+struct sigcontext {
+ /* gregs[0] holds the program counter. */
+ unsigned long int gregs[32];
+ unsigned long long int fpregs[66] __attribute__ ((__aligned__ (16)));
+};
+
+#endif
diff --git a/libc/sysdeps/linux/riscv64/bits/stackinfo.h b/libc/sysdeps/linux/riscv64/bits/stackinfo.h
new file mode 100644
index 0000000..a9fd817
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/stackinfo.h
@@ -0,0 +1,11 @@
+/*
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
+ * in this tarball.
+ */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H 1
+
+#define _STACK_GROWS_DOWN 1
+
+#endif
diff --git a/libc/sysdeps/linux/riscv64/bits/syscalls.h b/libc/sysdeps/linux/riscv64/bits/syscalls.h
new file mode 100644
index 0000000..d1f1d91
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/syscalls.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2018 by Waldemar Brodkorb <wbx@uclibc-ng.org>
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ * ported from GNU C Library
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ long _sys_result; \
+ { \
+ register long int _a7 __asm__ ("a7"); \
+ LOAD_ARGS_##nr (args) \
+ _a7 = (name); \
+ \
+ __asm__ volatile ( \
+ "scall\n\t" \
+ : "=r" (_a0) \
+ : "r"(_a7) ASM_ARGS_##nr \
+ : "memory"); \
+ _sys_result = _a0; \
+ } \
+ _sys_result; \
+ })
+
+/* Macros for setting up inline __asm__ input regs */
+# define ASM_ARGS_0
+# define ASM_ARGS_1 , "r" (_a0)
+# define ASM_ARGS_2 ASM_ARGS_1, "r" (_a1)
+# define ASM_ARGS_3 ASM_ARGS_2, "r" (_a2)
+# define ASM_ARGS_4 ASM_ARGS_3, "r" (_a3)
+# define ASM_ARGS_5 ASM_ARGS_4, "r" (_a4)
+# define ASM_ARGS_6 ASM_ARGS_5, "r" (_a5)
+# define ASM_ARGS_7 ASM_ARGS_6, "r" (_a6)
+
+/* Macros for converting sys-call wrapper args into sys call args */
+# define LOAD_ARGS_0() \
+ register long _a0 __asm__ ("a0");
+# define LOAD_ARGS_1(a0) \
+ long _a0tmp; \
+ LOAD_ARGS_0 () \
+ _a0tmp = (long) (a0); \
+ _a0 = _a0tmp;
+# define LOAD_ARGS_2(a0, a1) \
+ register long _a1 __asm__ ("a1"); \
+ long _a1tmp; \
+ LOAD_ARGS_1 (a0) \
+ _a1tmp = (long) (a1); \
+ _a1 = _a1tmp;
+# define LOAD_ARGS_3(a0, a1, a2) \
+ register long _a2 __asm__ ("a2"); \
+ long _a2tmp; \
+ LOAD_ARGS_2 (a0, a1) \
+ _a2tmp = (long) (a2); \
+ _a2 = _a2tmp;
+# define LOAD_ARGS_4(a0, a1, a2, a3) \
+ register long _a3 __asm__ ("a3"); \
+ long _a3tmp; \
+ LOAD_ARGS_3 (a0, a1, a2) \
+ _a3tmp = (long) (a3); \
+ _a3 = _a3tmp;
+# define LOAD_ARGS_5(a0, a1, a2, a3, a4) \
+ register long _a4 __asm__ ("a4"); \
+ long _a4tmp; \
+ LOAD_ARGS_4 (a0, a1, a2, a3) \
+ _a4tmp = (long) (a4); \
+ _a4 = _a4tmp;
+# define LOAD_ARGS_6(a0, a1, a2, a3, a4, a5) \
+ register long _a5 __asm__ ("a5"); \
+ long _a5tmp; \
+ LOAD_ARGS_5 (a0, a1, a2, a3, a4) \
+ _a5tmp = (long) (a5); \
+ _a5 = _a5tmp;
+# define LOAD_ARGS_7(a0, a1, a2, a3, a4, a5, a6)\
+ register long _a6 __asm__ ("a6"); \
+ long _a6tmp; \
+ LOAD_ARGS_6 (a0, a1, a2, a3, a4, a5) \
+ _a6tmp = (long) (a6); \
+ _a6 = _a6tmp;
+
+#endif
diff --git a/libc/sysdeps/linux/riscv64/bits/uClibc_arch_features.h b/libc/sysdeps/linux/riscv64/bits/uClibc_arch_features.h
new file mode 100644
index 0000000..b754f32
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/uClibc_arch_features.h
@@ -0,0 +1,39 @@
+/*
+ * Track misc arch-specific features that aren't config options
+ */
+
+#ifndef _BITS_UCLIBC_ARCH_FEATURES_H
+#define _BITS_UCLIBC_ARCH_FEATURES_H
+
+#undef __UCLIBC_ABORT_INSTRUCTION__
+
+/* can your target use syscall6() for mmap ? */
+#undef __UCLIBC_MMAP_HAS_6_ARGS__
+
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
+
+/* does your target have a broken create_module() ? */
+#define __UCLIBC_BROKEN_CREATE_MODULE__
+
+/* does your target have to worry about older [gs]etrlimit() ? */
+#define __UCLIBC_HANDLE_OLDER_RLIMIT__
+
+/* does your target have an asm .set ? */
+#define __UCLIBC_HAVE_ASM_SET_DIRECTIVE__
+
+/* define if target doesn't like .global */
+#undef __UCLIBC_ASM_GLOBAL_DIRECTIVE__
+
+/* define if target supports .weak */
+#define __UCLIBC_HAVE_ASM_WEAK_DIRECTIVE__
+
+/* define if target supports .weakext */
+#undef __UCLIBC_HAVE_ASM_WEAKEXT_DIRECTIVE__
+
+/* define if target supports IEEE signed zero floats */
+#define __UCLIBC_HAVE_SIGNED_ZERO__
+
+/* define if target supports CFI pseudo ops */
+#define __UCLIBC_HAVE_ASM_CFI_DIRECTIVES__
+
+#endif /* _BITS_UCLIBC_ARCH_FEATURES_H */
diff --git a/libc/sysdeps/linux/riscv64/bits/wordsize.h b/libc/sysdeps/linux/riscv64/bits/wordsize.h
new file mode 100644
index 0000000..67a16ba
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bits/wordsize.h
@@ -0,0 +1,29 @@
+/* Determine the wordsize from the preprocessor defines. RISC-V version.
+ Copyright (C) 2002-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#if __riscv_xlen == (__SIZEOF_POINTER__ * 8)
+# define __WORDSIZE __riscv_xlen
+#else
+# error unsupported ABI
+#endif
+
+#if __riscv_xlen == 64
+# define __WORDSIZE_TIME64_COMPAT32 1
+#else
+# error "rv32i-based targets are not supported"
+#endif
diff --git a/libc/sysdeps/linux/riscv64/bsd-_setjmp.c b/libc/sysdeps/linux/riscv64/bsd-_setjmp.c
new file mode 100644
index 0000000..0d41310
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bsd-_setjmp.c
@@ -0,0 +1 @@
+/* _setjmp is implemented in setjmp.S */
diff --git a/libc/sysdeps/linux/riscv64/bsd-setjmp.c b/libc/sysdeps/linux/riscv64/bsd-setjmp.c
new file mode 100644
index 0000000..0d41310
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/bsd-setjmp.c
@@ -0,0 +1 @@
+/* _setjmp is implemented in setjmp.S */
diff --git a/libc/sysdeps/linux/riscv64/clone.S b/libc/sysdeps/linux/riscv64/clone.S
new file mode 100644
index 0000000..f7684c8
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/clone.S
@@ -0,0 +1,80 @@
+/* Wrapper around clone system call. RISC-V version.
+ Copyright (C) 1996-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <sys/asm.h>
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ void *parent_tidptr, void *tls, void *child_tidptr) */
+
+ .text
+LEAF (clone)
+
+ /* Sanity check arguments. */
+ beqz a0,L (invalid) /* No NULL function pointers. */
+ beqz a1,L (invalid) /* No NULL stack pointers. */
+
+ addi a1,a1,-16 /* Reserve argument save space. */
+ REG_S a0,0(a1) /* Save function pointer. */
+ REG_S a3,SZREG(a1) /* Save argument pointer. */
+
+ /* The syscall expects the args to be in different slots. */
+ mv a0,a2
+ mv a2,a4
+ mv a3,a5
+ mv a4,a6
+
+ /* Do the system call. */
+ li a7,__NR_clone
+ scall
+
+ bltz a0,L (error)
+ beqz a0,L (thread_start)
+
+ /* Successful return from the parent. */
+ ret
+
+L (invalid):
+ li a0, -EINVAL
+ /* Something bad happened -- no child created. */
+L (error):
+ j __syscall_error
+ END (clone)
+
+/* Load up the arguments to the function. Put this block of code in
+ its own function so that we can terminate the stack trace with our
+ debug info. */
+
+ENTRY (__thread_start)
+L (thread_start):
+ /* Restore the arg for user's function. */
+ REG_L a1,0(sp) /* Function pointer. */
+ REG_L a0,SZREG(sp) /* Argument pointer. */
+
+ /* Call the user's function. */
+ jalr a1
+
+ /* Call exit with the function's return value. */
+ li a7, __NR_exit
+ scall
+
+ END (__thread_start)
diff --git a/libc/sysdeps/linux/riscv64/crt1.S b/libc/sysdeps/linux/riscv64/crt1.S
new file mode 100644
index 0000000..872e0b1
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/crt1.S
@@ -0,0 +1,83 @@
+/* Startup code compliant to the ELF RISC-V ABI.
+ Copyright (C) 1995-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define __ASSEMBLY__ 1
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+/* The entry point's job is to call __uClibc_main. Per the ABI,
+ a0 contains the address of a function to be passed to atexit.
+ __uClibc_main wants this in a5. */
+
+.text
+ .globl _start
+ .type _start,%function
+
+_start:
+ call .Lload_gp
+ mv a5, a0 /* rtld_fini. */
+ /* main may be in a shared library. */
+ la a0, main
+ REG_L a1, 0(sp) /* argc. */
+ addi a2, sp, SZREG /* argv. */
+ andi sp, sp, ALMASK /* Align stack. */
+ mv a6, sp /* stack_end. */
+
+ tail __uClibc_main@plt
+
+ .size _start,.-_start
+
+/* Dynamic links need the global pointer to be initialized prior to calling
+ any shared library's initializers, so we use preinit_array to load it.
+ This doesn't cut it for static links, though, since the global pointer
+ needs to be initialized before calling __libc_start_main in that case.
+ So we redundantly initialize it at the beginning of _start. */
+
+.Lload_gp:
+.option push
+.option norelax
+ lla gp, __global_pointer$
+.option pop
+ ret
+
+ .section .preinit_array,"aw"
+ .dc.a .Lload_gp
+
+/* Define a symbol for the first piece of initialized data. */
+ .data
+ .globl __data_start
+__data_start:
+ .weak data_start
+ data_start = __data_start
diff --git a/libc/sysdeps/linux/riscv64/crti.S b/libc/sysdeps/linux/riscv64/crti.S
new file mode 100644
index 0000000..176de91
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/crti.S
@@ -0,0 +1,17 @@
+/* dummy _init and _fini */
+
+ .section .init
+ .globl _init
+ .align 2
+ .type _init,@function
+
+_init:
+
+
+ .section .fini
+ .global _fini
+ .align 2
+ .type _fini,@function
+
+_fini:
+
diff --git a/libc/sysdeps/linux/riscv64/crtn.S b/libc/sysdeps/linux/riscv64/crtn.S
new file mode 100644
index 0000000..6f70e77
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/crtn.S
@@ -0,0 +1,13 @@
+/* Dummy crtn file.
+
+ In this configuration, crti.o and crtn.o are both empty because the
+ .init_array/.fini_array sections are used exclusively.
+
+ Older ports cannot use this because even if the linker used to
+ build libc itself has .init_array support, we don't want to produce
+ a crt[in].o that presume a linker that new will be used to link
+ other things later.
+
+ But new configurations without compatibility concerns for
+ toolchains without .init_array support can use this to avoid the
+ superfluous .init and .fini boilerplate code. */
diff --git a/libc/sysdeps/linux/riscv64/getcontext.S b/libc/sysdeps/linux/riscv64/getcontext.S
new file mode 100644
index 0000000..0b9e7c2
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/getcontext.S
@@ -0,0 +1,74 @@
+/* Save current context.
+ Copyright (C) 2009-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "ucontext-macros.h"
+
+/* int getcontext (ucontext_t *ucp) */
+
+ .text
+LEAF (getcontext)
+ SAVE_INT_REG (ra, 0, a0)
+ SAVE_INT_REG (ra, 1, a0)
+ SAVE_INT_REG (sp, 2, a0)
+ SAVE_INT_REG (s0, 8, a0)
+ SAVE_INT_REG (s1, 9, a0)
+ SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */
+ SAVE_INT_REG (s2, 18, a0)
+ SAVE_INT_REG (s3, 19, a0)
+ SAVE_INT_REG (s4, 20, a0)
+ SAVE_INT_REG (s5, 21, a0)
+ SAVE_INT_REG (s6, 22, a0)
+ SAVE_INT_REG (s7, 23, a0)
+ SAVE_INT_REG (s8, 24, a0)
+ SAVE_INT_REG (s9, 25, a0)
+ SAVE_INT_REG (s10, 26, a0)
+ SAVE_INT_REG (s11, 27, a0)
+
+#ifndef __riscv_float_abi_soft
+ frsr a1
+
+ SAVE_FP_REG (fs0, 8, a0)
+ SAVE_FP_REG (fs1, 9, a0)
+ SAVE_FP_REG (fs2, 18, a0)
+ SAVE_FP_REG (fs3, 19, a0)
+ SAVE_FP_REG (fs4, 20, a0)
+ SAVE_FP_REG (fs5, 21, a0)
+ SAVE_FP_REG (fs6, 22, a0)
+ SAVE_FP_REG (fs7, 23, a0)
+ SAVE_FP_REG (fs8, 24, a0)
+ SAVE_FP_REG (fs9, 25, a0)
+ SAVE_FP_REG (fs10, 26, a0)
+ SAVE_FP_REG (fs11, 27, a0)
+
+ sw a1, MCONTEXT_FSR(a0)
+#endif /* __riscv_float_abi_soft */
+
+/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ li a3, _NSIG8
+ add a2, a0, UCONTEXT_SIGMASK
+ mv a1, zero
+ li a0, SIG_BLOCK
+
+ li a7, SYS_ify (rt_sigprocmask)
+ scall
+ bltz a0, 99f
+
+ ret
+
+99: j __syscall_error
+
+PSEUDO_END (getcontext)
diff --git a/libc/sysdeps/linux/riscv64/jmpbuf-offsets.h b/libc/sysdeps/linux/riscv64/jmpbuf-offsets.h
new file mode 100644
index 0000000..fff4d0d
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/jmpbuf-offsets.h
@@ -0,0 +1,23 @@
+/* Private macros for accessing __jmp_buf contents. RISC-V version.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <jmpbuf-unwind.h>
+
+/* Helper for generic ____longjmp_chk(). */
+#define JB_FRAME_ADDRESS(buf) \
+ ((void *) _jmpbuf_sp (buf))
diff --git a/libc/sysdeps/linux/riscv64/jmpbuf-unwind.h b/libc/sysdeps/linux/riscv64/jmpbuf-unwind.h
new file mode 100644
index 0000000..2e5f37f
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/jmpbuf-unwind.h
@@ -0,0 +1,46 @@
+/* Examine __jmp_buf for unwinding frames. RISC-V version.
+ Copyright (C) 2003-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+#include <sysdep.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+static inline uintptr_t __attribute__ ((unused))
+_jmpbuf_sp (__jmp_buf regs)
+{
+ uintptr_t sp = regs[0].__sp;
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (sp);
+#endif
+ return sp;
+}
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
+
+/* We use the normal longjmp for unwinding. */
+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
diff --git a/libc/sysdeps/linux/riscv64/setcontext.S b/libc/sysdeps/linux/riscv64/setcontext.S
new file mode 100644
index 0000000..15cc17b
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/setcontext.S
@@ -0,0 +1,112 @@
+/* Set current context.
+ Copyright (C) 2009-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "ucontext-macros.h"
+
+/* int __setcontext (const ucontext_t *ucp)
+
+ Restores the machine context in UCP and thereby resumes execution
+ in that context.
+
+ This implementation is intended to be used for *synchronous* context
+ switches only. Therefore, it does not have to restore anything
+ other than the PRESERVED state. */
+
+ .text
+LEAF (setcontext)
+
+ mv t0, a0 /* Save ucp into t0. */
+
+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
+ li a3, _NSIG8
+ mv a2, zero
+ add a1, a0, UCONTEXT_SIGMASK
+ li a0, SIG_SETMASK
+
+ li a7, SYS_ify (rt_sigprocmask)
+ scall
+
+ bltz a0, 99f
+
+ cfi_def_cfa (t0, 0)
+
+#ifndef __riscv_float_abi_soft
+ lw t1, MCONTEXT_FSR(t0)
+
+ RESTORE_FP_REG_CFI (fs0, 8, t0)
+ RESTORE_FP_REG_CFI (fs1, 9, t0)
+ RESTORE_FP_REG_CFI (fs2, 18, t0)
+ RESTORE_FP_REG_CFI (fs3, 19, t0)
+ RESTORE_FP_REG_CFI (fs4, 20, t0)
+ RESTORE_FP_REG_CFI (fs5, 21, t0)
+ RESTORE_FP_REG_CFI (fs6, 22, t0)
+ RESTORE_FP_REG_CFI (fs7, 23, t0)
+ RESTORE_FP_REG_CFI (fs8, 24, t0)
+ RESTORE_FP_REG_CFI (fs9, 25, t0)
+ RESTORE_FP_REG_CFI (fs10, 26, t0)
+ RESTORE_FP_REG_CFI (fs11, 27, t0)
+
+ fssr t1
+#endif /* __riscv_float_abi_soft */
+
+ /* Note the contents of argument registers will be random
+ unless makecontext() has been called. */
+ RESTORE_INT_REG (t1, 0, t0)
+ RESTORE_INT_REG_CFI (ra, 1, t0)
+ RESTORE_INT_REG (sp, 2, t0)
+ RESTORE_INT_REG_CFI (s0, 8, t0)
+ RESTORE_INT_REG_CFI (s1, 9, t0)
+ RESTORE_INT_REG (a0, 10, t0)
+ RESTORE_INT_REG (a1, 11, t0)
+ RESTORE_INT_REG (a2, 12, t0)
+ RESTORE_INT_REG (a3, 13, t0)
+ RESTORE_INT_REG (a4, 14, t0)
+ RESTORE_INT_REG (a5, 15, t0)
+ RESTORE_INT_REG (a6, 16, t0)
+ RESTORE_INT_REG (a7, 17, t0)
+ RESTORE_INT_REG_CFI (s2, 18, t0)
+ RESTORE_INT_REG_CFI (s3, 19, t0)
+ RESTORE_INT_REG_CFI (s4, 20, t0)
+ RESTORE_INT_REG_CFI (s5, 21, t0)
+ RESTORE_INT_REG_CFI (s6, 22, t0)
+ RESTORE_INT_REG_CFI (s7, 23, t0)
+ RESTORE_INT_REG_CFI (s8, 24, t0)
+ RESTORE_INT_REG_CFI (s9, 25, t0)
+ RESTORE_INT_REG_CFI (s10, 26, t0)
+ RESTORE_INT_REG_CFI (s11, 27, t0)
+
+ jr t1
+
+99: j __syscall_error
+
+PSEUDO_END (setcontext)
+
+LEAF (start_context)
+
+ /* Terminate call stack by noting ra == 0. Happily, s0 == 0 here. */
+ cfi_register (ra, s0)
+
+ /* Call the function passed to makecontext. */
+ jalr s1
+
+ /* Invoke subsequent context if present, else exit(0). */
+ mv a0, s2
+ beqz s2, 1f
+ jal setcontext
+1: j exit
+
+PSEUDO_END (start_context)
diff --git a/libc/sysdeps/linux/riscv64/setjmp.S b/libc/sysdeps/linux/riscv64/setjmp.S
new file mode 100644
index 0000000..4cdb8e9
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/setjmp.S
@@ -0,0 +1,73 @@
+/* setjmp for RISC-V.
+ Copyright (C) 1996-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+ENTRY (_setjmp)
+ li a1, 0
+ j __sigsetjmp
+END (_setjmp)
+ENTRY (setjmp)
+ li a1, 1
+ /* Fallthrough */
+END (setjmp)
+ENTRY (__sigsetjmp)
+ REG_S ra, 0*SZREG(a0)
+ REG_S s0, 1*SZREG(a0)
+ REG_S s1, 2*SZREG(a0)
+ REG_S s2, 3*SZREG(a0)
+ REG_S s3, 4*SZREG(a0)
+ REG_S s4, 5*SZREG(a0)
+ REG_S s5, 6*SZREG(a0)
+ REG_S s6, 7*SZREG(a0)
+ REG_S s7, 8*SZREG(a0)
+ REG_S s8, 9*SZREG(a0)
+ REG_S s9, 10*SZREG(a0)
+ REG_S s10,11*SZREG(a0)
+ REG_S s11,12*SZREG(a0)
+ REG_S sp, 13*SZREG(a0)
+
+#ifndef __riscv_float_abi_soft
+ FREG_S fs0, 14*SZREG+ 0*SZFREG(a0)
+ FREG_S fs1, 14*SZREG+ 1*SZFREG(a0)
+ FREG_S fs2, 14*SZREG+ 2*SZFREG(a0)
+ FREG_S fs3, 14*SZREG+ 3*SZFREG(a0)
+ FREG_S fs4, 14*SZREG+ 4*SZFREG(a0)
+ FREG_S fs5, 14*SZREG+ 5*SZFREG(a0)
+ FREG_S fs6, 14*SZREG+ 6*SZFREG(a0)
+ FREG_S fs7, 14*SZREG+ 7*SZFREG(a0)
+ FREG_S fs8, 14*SZREG+ 8*SZFREG(a0)
+ FREG_S fs9, 14*SZREG+ 9*SZFREG(a0)
+ FREG_S fs10,14*SZREG+10*SZFREG(a0)
+ FREG_S fs11,14*SZREG+11*SZFREG(a0)
+#endif
+
+#if !IS_IN_libc && IS_IN_rtld
+ /* In ld.so we never save the signal mask. */
+ li a0, 0
+ ret
+#else
+ /* Make a tail call to __sigjmp_save; it takes the same args. */
+ j __sigjmp_save
+#endif
+
+
+END (__sigsetjmp)
+
+hidden_def (__sigsetjmp)
+weak_alias (_setjmp, __GI__setjmp)
diff --git a/libc/sysdeps/linux/riscv64/swapcontext.S b/libc/sysdeps/linux/riscv64/swapcontext.S
new file mode 100644
index 0000000..f5e12b2
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/swapcontext.S
@@ -0,0 +1,122 @@
+/* Save and set current context.
+ Copyright (C) 2009-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "ucontext-macros.h"
+
+/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
+
+LEAF (swapcontext)
+ mv t0, a1 /* Save ucp into t0. */
+
+ SAVE_INT_REG (ra, 0, a0)
+ SAVE_INT_REG (ra, 1, a0)
+ SAVE_INT_REG (sp, 2, a0)
+ SAVE_INT_REG (s0, 8, a0)
+ SAVE_INT_REG (s1, 9, a0)
+ SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */
+ SAVE_INT_REG (s2, 18, a0)
+ SAVE_INT_REG (s3, 19, a0)
+ SAVE_INT_REG (s4, 20, a0)
+ SAVE_INT_REG (s5, 21, a0)
+ SAVE_INT_REG (s6, 22, a0)
+ SAVE_INT_REG (s7, 23, a0)
+ SAVE_INT_REG (s8, 24, a0)
+ SAVE_INT_REG (s9, 25, a0)
+ SAVE_INT_REG (s10, 26, a0)
+ SAVE_INT_REG (s11, 27, a0)
+
+#ifndef __riscv_float_abi_soft
+ frsr a1
+
+ SAVE_FP_REG (fs0, 8, a0)
+ SAVE_FP_REG (fs1, 9, a0)
+ SAVE_FP_REG (fs2, 18, a0)
+ SAVE_FP_REG (fs3, 19, a0)
+ SAVE_FP_REG (fs4, 20, a0)
+ SAVE_FP_REG (fs5, 21, a0)
+ SAVE_FP_REG (fs6, 22, a0)
+ SAVE_FP_REG (fs7, 23, a0)
+ SAVE_FP_REG (fs8, 24, a0)
+ SAVE_FP_REG (fs9, 25, a0)
+ SAVE_FP_REG (fs10, 26, a0)
+ SAVE_FP_REG (fs11, 27, a0)
+
+ sw a1, MCONTEXT_FSR(a0)
+#endif /* __riscv_float_abi_soft */
+
+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
+ li a3, _NSIG8
+ add a2, a0, UCONTEXT_SIGMASK
+ add a1, t0, UCONTEXT_SIGMASK
+ li a0, SIG_SETMASK
+
+ li a7, SYS_ify (rt_sigprocmask)
+ scall
+
+ bltz a0, 99f
+
+#ifndef __riscv_float_abi_soft
+ lw t1, MCONTEXT_FSR(t0)
+
+ RESTORE_FP_REG (fs0, 8, t0)
+ RESTORE_FP_REG (fs1, 9, t0)
+ RESTORE_FP_REG (fs2, 18, t0)
+ RESTORE_FP_REG (fs3, 19, t0)
+ RESTORE_FP_REG (fs4, 20, t0)
+ RESTORE_FP_REG (fs5, 21, t0)
+ RESTORE_FP_REG (fs6, 22, t0)
+ RESTORE_FP_REG (fs7, 23, t0)
+ RESTORE_FP_REG (fs8, 24, t0)
+ RESTORE_FP_REG (fs9, 25, t0)
+ RESTORE_FP_REG (fs10, 26, t0)
+ RESTORE_FP_REG (fs11, 27, t0)
+
+ fssr t1
+#endif /* __riscv_float_abi_soft */
+
+ /* Note the contents of argument registers will be random
+ unless makecontext() has been called. */
+ RESTORE_INT_REG (t1, 0, t0)
+ RESTORE_INT_REG (ra, 1, t0)
+ RESTORE_INT_REG (sp, 2, t0)
+ RESTORE_INT_REG (s0, 8, t0)
+ RESTORE_INT_REG (s1, 9, t0)
+ RESTORE_INT_REG (a0, 10, t0)
+ RESTORE_INT_REG (a1, 11, t0)
+ RESTORE_INT_REG (a2, 12, t0)
+ RESTORE_INT_REG (a3, 13, t0)
+ RESTORE_INT_REG (a4, 14, t0)
+ RESTORE_INT_REG (a5, 15, t0)
+ RESTORE_INT_REG (a6, 16, t0)
+ RESTORE_INT_REG (a7, 17, t0)
+ RESTORE_INT_REG (s2, 18, t0)
+ RESTORE_INT_REG (s3, 19, t0)
+ RESTORE_INT_REG (s4, 20, t0)
+ RESTORE_INT_REG (s5, 21, t0)
+ RESTORE_INT_REG (s6, 22, t0)
+ RESTORE_INT_REG (s7, 23, t0)
+ RESTORE_INT_REG (s8, 24, t0)
+ RESTORE_INT_REG (s9, 25, t0)
+ RESTORE_INT_REG (s10, 26, t0)
+ RESTORE_INT_REG (s11, 27, t0)
+
+ jr t1
+
+
+99: j __syscall_error
+
+PSEUDO_END (swapcontext)
diff --git a/libc/sysdeps/linux/riscv64/sys/asm.h b/libc/sysdeps/linux/riscv64/sys/asm.h
new file mode 100644
index 0000000..ddb84b6
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sys/asm.h
@@ -0,0 +1,63 @@
+/* Miscellaneous macros.
+ Copyright (C) 2000-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_ASM_H
+#define _SYS_ASM_H
+
+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
+#if __riscv_xlen == 64
+# define PTRLOG 3
+# define SZREG 8
+# define REG_S sd
+# define REG_L ld
+#elif __riscv_xlen == 32
+# error "rv32i-based targets are not supported"
+#else
+# error __riscv_xlen must equal 32 or 64
+#endif
+
+#if !defined __riscv_float_abi_soft
+/* For ABI uniformity, reserve 8 bytes for floats, even if double-precision
+ floating-point is not supported in hardware. */
+# if defined __riscv_float_abi_double
+# define FREG_L fld
+# define FREG_S fsd
+# define SZFREG 8
+# else
+# error unsupported FLEN
+# endif
+#endif
+
+/* Declare leaf routine. */
+#define LEAF(symbol) \
+ .globl symbol; \
+ .align 2; \
+ .type symbol,@function; \
+symbol: \
+ cfi_startproc;
+
+/* Mark end of function. */
+#undef END
+#define END(function) \
+ cfi_endproc; \
+ .size function,.-function
+
+/* Stack alignment. */
+#define ALMASK ~15
+
+#endif /* sys/asm.h */
diff --git a/libc/sysdeps/linux/riscv64/sys/procfs.h b/libc/sysdeps/linux/riscv64/sys/procfs.h
new file mode 100644
index 0000000..518de56
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sys/procfs.h
@@ -0,0 +1,114 @@
+/* Core image file related definitions, RISC-V version.
+ Copyright (C) 1996-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_PROCFS_H
+#define _SYS_PROCFS_H 1
+
+/* This is somehow modelled after the file of the same name on SysVr4
+ systems. It provides a definition of the core file format for ELF
+ used on Linux. */
+
+#include <features.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/user.h>
+#include <sys/ucontext.h>
+
+/* ELF register definitions */
+#define ELF_NGREG NGREG
+#define ELF_NFPREG NFPREG
+
+typedef unsigned long int elf_greg_t;
+typedef unsigned long int elf_gregset_t[32];
+typedef union __riscv_mc_fp_state elf_fpregset_t;
+
+__BEGIN_DECLS
+
+struct elf_siginfo
+ {
+ int si_signo; /* Signal number. */
+ int si_code; /* Extra code. */
+ int si_errno; /* Errno. */
+ };
+
+
+/* Definitions to generate Intel SVR4-like core files. These mostly
+ have the same names as the SVR4 types with "elf_" tacked on the
+ front to prevent clashes with linux definitions, and the typedef
+ forms have been avoided. This is mostly like the SVR4 structure,
+ but more Linuxy, with things that Linux does not support and which
+ gdb doesn't really use excluded. Fields present but not used are
+ marked with "XXX". */
+struct elf_prstatus
+ {
+ struct elf_siginfo pr_info; /* Info associated with signal. */
+ short int pr_cursig; /* Current signal. */
+ unsigned long int pr_sigpend; /* Set of pending signals. */
+ unsigned long int pr_sighold; /* Set of held signals. */
+ __pid_t pr_pid;
+ __pid_t pr_ppid;
+ __pid_t pr_pgrp;
+ __pid_t pr_sid;
+ struct timeval pr_utime; /* User time. */
+ struct timeval pr_stime; /* System time. */
+ struct timeval pr_cutime; /* Cumulative user time. */
+ struct timeval pr_cstime; /* Cumulative system time. */
+ elf_gregset_t pr_reg; /* GP registers. */
+ int pr_fpvalid; /* True if math copro being used. */
+ };
+
+
+#define ELF_PRARGSZ (80) /* Number of chars for args */
+
+struct elf_prpsinfo
+ {
+ char pr_state; /* Numeric process state. */
+ char pr_sname; /* Char for pr_state. */
+ char pr_zomb; /* Zombie. */
+ char pr_nice; /* Nice val. */
+ unsigned long int pr_flag; /* Flags. */
+ long int pr_uid;
+ long int pr_gid;
+ int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+ /* Lots missing */
+ char pr_fname[16]; /* Filename of executable. */
+ char pr_psargs[ELF_PRARGSZ]; /* Initial part of arg list. */
+ };
+
+/* The rest of this file provides the types for emulation of the
+ Solaris <proc_service.h> interfaces that should be implemented by
+ users of libthread_db. */
+
+/* Addresses. */
+typedef void *psaddr_t;
+
+/* Register sets. Linux has different names. */
+typedef elf_gregset_t prgregset_t;
+typedef elf_fpregset_t prfpregset_t;
+
+/* We don't have any differences between processes and threads,
+ therefore habe only ine PID type. */
+typedef __pid_t lwpid_t;
+
+/* Process status and info. In the end we do provide typedefs for them. */
+typedef struct elf_prstatus prstatus_t;
+typedef struct elf_prpsinfo prpsinfo_t;
+
+__END_DECLS
+
+#endif /* sys/procfs.h */
diff --git a/libc/sysdeps/linux/riscv64/sys/ucontext.h b/libc/sysdeps/linux/riscv64/sys/ucontext.h
new file mode 100644
index 0000000..2a80a85
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sys/ucontext.h
@@ -0,0 +1,106 @@
+/* struct ucontext definition, RISC-V version.
+ Copyright (C) 1997-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Don't rely on this, the interface is currently messed up and may need to
+ be broken to be fixed. */
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+
+typedef unsigned long int __riscv_mc_gp_state[32];
+
+#ifdef __USE_MISC
+# define NGREG 32
+
+# define REG_PC 0
+# define REG_RA 1
+# define REG_SP 2
+# define REG_TP 4
+# define REG_S0 8
+# define REG_S1 9
+# define REG_A0 10
+# define REG_S2 18
+# define REG_NARGS 8
+
+typedef unsigned long int greg_t;
+
+/* Container for all general registers. */
+typedef __riscv_mc_gp_state gregset_t;
+
+/* Container for floating-point state. */
+typedef union __riscv_mc_fp_state fpregset_t;
+#endif
+
+struct __riscv_mc_f_ext_state
+ {
+ unsigned int __f[32];
+ unsigned int __fcsr;
+ };
+
+struct __riscv_mc_d_ext_state
+ {
+ unsigned long long int __f[32];
+ unsigned int __fcsr;
+ };
+
+struct __riscv_mc_q_ext_state
+ {
+ unsigned long long int __f[64] __attribute__ ((__aligned__ (16)));
+ unsigned int __fcsr;
+ /* Reserved for expansion of sigcontext structure. Currently zeroed
+ upon signal, and must be zero upon sigreturn. */
+ unsigned int __glibc_reserved[3];
+ };
+
+union __riscv_mc_fp_state
+ {
+ struct __riscv_mc_f_ext_state __f;
+ struct __riscv_mc_d_ext_state __d;
+ struct __riscv_mc_q_ext_state __q;
+ };
+
+typedef struct mcontext_t
+ {
+ __riscv_mc_gp_state __gregs;
+ union __riscv_mc_fp_state __fpregs;
+ } mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext_t
+ {
+ unsigned long int __uc_flags;
+ struct ucontext_t *uc_link;
+ stack_t uc_stack;
+ sigset_t uc_sigmask;
+ /* There's some padding here to allow sigset_t to be expanded in the
+ future. Though this is unlikely, other architectures put uc_sigmask
+ at the end of this structure and explicitly state it can be
+ expanded, so we didn't want to box ourselves in here. */
+ char __glibc_reserved[1024 / 8 - sizeof (sigset_t)];
+ /* We can't put uc_sigmask at the end of this structure because we need
+ to be able to expand sigcontext in the future. For example, the
+ vector ISA extension will almost certainly add ISA state. We want
+ to ensure all user-visible ISA state can be saved and restored via a
+ ucontext, so we're putting this at the end in order to allow for
+ infinite extensibility. Since we know this will be extended and we
+ assume sigset_t won't be extended an extreme amount, we're
+ prioritizing this. */
+ mcontext_t uc_mcontext;
+ } ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/libc/sysdeps/linux/riscv64/sys/user.h b/libc/sysdeps/linux/riscv64/sys/user.h
new file mode 100644
index 0000000..c871f1a
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sys/user.h
@@ -0,0 +1 @@
+/* This file is not needed, but in practice gdb might try to include it. */
diff --git a/libc/sysdeps/linux/riscv64/sysdep.h b/libc/sysdeps/linux/riscv64/sysdep.h
new file mode 100644
index 0000000..b123293
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sysdep.h
@@ -0,0 +1,125 @@
+/* Assembly macros for RISC-V.
+ Copyright (C) 2011-2018
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LINUX_RISCV_SYSDEP_H
+#define _LINUX_RISCV_SYSDEP_H 1
+
+#include <common/sysdep.h>
+
+#ifdef __ASSEMBLER__
+
+# include <sys/asm.h>
+
+# define ENTRY(name) LEAF(name)
+
+# define L(label) .L ## label
+
+/* Performs a system call, handling errors by setting errno. Linux indicates
+ errors by setting a0 to a value between -1 and -4095. */
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .text; \
+ .align 2; \
+ ENTRY (name); \
+ li a7, SYS_ify (syscall_name); \
+ scall; \
+ li a7, -4096; \
+ bgtu a0, a7, .Lsyscall_error ## name;
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym) \
+ SYSCALL_ERROR_HANDLER (sym) \
+ ret; \
+ END (sym)
+
+# if !IS_IN_libc
+# if defined (__PIC__)
+# define SYSCALL_ERROR_HANDLER(name) \
+.Lsyscall_error ## name: \
+ la.tls.ie t1, errno; \
+ add t1, t1, tp; \
+ neg a0, a0; \
+ sw a0, 0(t1); \
+ li a0, -1;
+# else
+# define SYSCALL_ERROR_HANDLER(name) \
+.Lsyscall_error ## name: \
+ lui t1, %tprel_hi(errno); \
+ add t1, t1, tp, %tprel_add(errno); \
+ neg a0, a0; \
+ sw a0, %tprel_lo(errno)(t1); \
+ li a0, -1;
+# endif
+# else
+# define SYSCALL_ERROR_HANDLER(name) \
+.Lsyscall_error ## name: \
+ j __syscall_error;
+# endif
+
+/* Performs a system call, not setting errno. */
+# undef PSEUDO_NEORRNO
+# define PSEUDO_NOERRNO(name, syscall_name, args) \
+ .align 2; \
+ ENTRY (name); \
+ li a7, SYS_ify (syscall_name); \
+ scall;
+
+# undef PSEUDO_END_NOERRNO
+# define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+# undef ret_NOERRNO
+# define ret_NOERRNO ret
+
+/* Perfroms a system call, returning the error code. */
+# undef PSEUDO_ERRVAL
+# define PSEUDO_ERRVAL(name, syscall_name, args) \
+ PSEUDO_NOERRNO (name, syscall_name, args) \
+ neg a0, a0;
+
+# undef PSEUDO_END_ERRVAL
+# define PSEUDO_END_ERRVAL(name) \
+ END (name)
+
+# undef ret_ERRVAL
+# define ret_ERRVAL ret
+
+#endif /* __ASSEMBLER__ */
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL. */
+#ifndef __ASSEMBLER__
+# include <errno.h>
+#endif
+
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+#ifndef __ASSEMBLER__
+
+/* List of system calls which are supported as vsyscalls. */
+# define HAVE_CLOCK_GETRES_VSYSCALL 1
+# define HAVE_CLOCK_GETTIME_VSYSCALL 1
+# define HAVE_GETTIMEOFDAY_VSYSCALL 1
+# define HAVE_GETCPU_VSYSCALL 1
+
+
+extern long int __syscall_error (long int neg_errno);
+
+#endif /* ! __ASSEMBLER__ */
+
+#endif /* linux/riscv/sysdep.h */
diff --git a/libc/sysdeps/linux/riscv64/vfork.S b/libc/sysdeps/linux/riscv64/vfork.S
new file mode 100644
index 0000000..a624f2a
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/vfork.S
@@ -0,0 +1,42 @@
+/* vfork for Linux, RISC-V version.
+ Copyright (C) 2005-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* vfork() is just a special case of clone(). */
+
+#include <sys/asm.h>
+#include <sysdep.h>
+#define __ASSEMBLY__
+#include <linux/sched.h>
+#include <asm/signal.h>
+
+ .text
+LEAF (__vfork)
+
+ li a0, (CLONE_VFORK | CLONE_VM | SIGCHLD)
+ mv a1, sp
+
+ li a7, __NR_clone
+ scall
+
+ bltz a0, 1f
+ ret
+
+1: j __syscall_error
+END (__vfork)
+libc_hidden_def(vfork)
+
+weak_alias (__vfork, vfork)