--- /dev/null
+From 6a4f4a9c774608add4b02f95322518bd2f5f51ee Mon Sep 17 00:00:00 2001
+From: Aric Belsito <lluixhi@gmail.com>
+Date: Tue, 5 Jan 2016 16:12:18 -0800
+Subject: [PATCH] RISC-V: add riscv32 and riscv64 architecture support
+
+Author: Alex Suykov <alex.suykov@gmail.com>
+Author: Aric Belsito <lluixhi@gmail.com>
+Author: Michael Clark <mjc@sifive.com>
+---
+ arch/riscv32/atomic_arch.h | 35 ++++
+ arch/riscv32/bits/alltypes.h.in | 26 +++
+ arch/riscv32/bits/endian.h | 5 +
+ arch/riscv32/bits/fcntl.h | 38 ++++
+ arch/riscv32/bits/fenv.h | 18 ++
+ arch/riscv32/bits/float.h | 16 ++
+ arch/riscv32/bits/ipc.h | 14 ++
+ arch/riscv32/bits/limits.h | 7 +
+ arch/riscv32/bits/msg.h | 13 ++
+ arch/riscv32/bits/posix.h | 2 +
+ arch/riscv32/bits/reg.h | 8 +
+ arch/riscv32/bits/sem.h | 9 +
+ arch/riscv32/bits/setjmp.h | 1 +
+ arch/riscv32/bits/shm.h | 26 +++
+ arch/riscv32/bits/signal.h | 113 ++++++++++
+ arch/riscv32/bits/socket.h | 33 +++
+ arch/riscv32/bits/stat.h | 18 ++
+ arch/riscv32/bits/stdint.h | 20 ++
+ arch/riscv32/bits/syscall.h.in | 278 +++++++++++++++++++++++++
+ arch/riscv32/bits/user.h | 43 ++++
+ arch/riscv32/crt_arch.h | 18 ++
+ arch/riscv32/pthread_arch.h | 12 ++
+ arch/riscv32/reloc.h | 27 +++
+ arch/riscv32/syscall_arch.h | 78 +++++++
+ arch/riscv64/atomic_arch.h | 66 ++++++
+ arch/riscv64/bits/alltypes.h.in | 29 +++
+ arch/riscv64/bits/endian.h | 5 +
+ arch/riscv64/bits/fcntl.h | 38 ++++
+ arch/riscv64/bits/fenv.h | 17 ++
+ arch/riscv64/bits/float.h | 16 ++
+ arch/riscv64/bits/ipc.h | 14 ++
+ arch/riscv64/bits/limits.h | 7 +
+ arch/riscv64/bits/mman.h | 1 +
+ arch/riscv64/bits/msg.h | 13 ++
+ arch/riscv64/bits/posix.h | 2 +
+ arch/riscv64/bits/reg.h | 8 +
+ arch/riscv64/bits/sem.h | 9 +
+ arch/riscv64/bits/setjmp.h | 1 +
+ arch/riscv64/bits/shm.h | 26 +++
+ arch/riscv64/bits/signal.h | 113 ++++++++++
+ arch/riscv64/bits/socket.h | 33 +++
+ arch/riscv64/bits/stat.h | 18 ++
+ arch/riscv64/bits/stdint.h | 20 ++
+ arch/riscv64/bits/syscall.h.in | 278 +++++++++++++++++++++++++
+ arch/riscv64/bits/user.h | 43 ++++
+ arch/riscv64/crt_arch.h | 18 ++
+ arch/riscv64/pthread_arch.h | 12 ++
+ arch/riscv64/reloc.h | 27 +++
+ arch/riscv64/syscall_arch.h | 76 +++++++
+ configure | 7 +
+ crt/riscv32/crti.s | 11 +
+ crt/riscv32/crtn.s | 0
+ crt/riscv64/crti.s | 11 +
+ crt/riscv64/crtn.s | 0
+ include/elf.h | 56 +++++
+ src/fenv/riscv32/fenv-sf.c | 3 +
+ src/fenv/riscv32/fenv.S | 53 +++++
+ src/fenv/riscv64/fenv-sf.c | 3 +
+ src/fenv/riscv64/fenv.S | 53 +++++
+ src/internal/riscv32/syscall.s | 15 ++
+ src/internal/riscv64/syscall.s | 15 ++
+ src/ldso/riscv32/dlsym.s | 6 +
+ src/ldso/riscv64/dlsym.s | 6 +
+ src/math/riscv32/copysign.s | 5 +
+ src/math/riscv32/copysignf.s | 5 +
+ src/math/riscv32/fabs.s | 5 +
+ src/math/riscv32/fabsf.s | 5 +
+ src/math/riscv32/fma.s | 5 +
+ src/math/riscv32/fmaf.s | 5 +
+ src/math/riscv32/fmax.s | 5 +
+ src/math/riscv32/fmaxf.s | 5 +
+ src/math/riscv32/fmin.s | 5 +
+ src/math/riscv32/fminf.s | 5 +
+ src/math/riscv32/sqrt.s | 5 +
+ src/math/riscv32/sqrtf.s | 5 +
+ src/math/riscv64/copysign.s | 5 +
+ src/math/riscv64/copysignf.s | 5 +
+ src/math/riscv64/fabs.s | 5 +
+ src/math/riscv64/fabsf.s | 5 +
+ src/math/riscv64/fma.s | 5 +
+ src/math/riscv64/fmaf.s | 5 +
+ src/math/riscv64/fmax.s | 5 +
+ src/math/riscv64/fmaxf.s | 5 +
+ src/math/riscv64/fmin.s | 5 +
+ src/math/riscv64/fminf.s | 5 +
+ src/math/riscv64/sqrt.s | 5 +
+ src/math/riscv64/sqrtf.s | 5 +
+ src/setjmp/riscv32/longjmp.S | 44 ++++
+ src/setjmp/riscv32/setjmp.S | 42 ++++
+ src/setjmp/riscv64/longjmp.S | 44 ++++
+ src/setjmp/riscv64/setjmp.S | 42 ++++
+ src/signal/riscv32/restore.s | 8 +
+ src/signal/riscv32/sigsetjmp.s | 21 ++
+ src/signal/riscv64/restore.s | 8 +
+ src/signal/riscv64/sigsetjmp.s | 21 ++
+ src/thread/riscv32/__set_thread_area.s | 6 +
+ src/thread/riscv32/__unmapself.s | 7 +
+ src/thread/riscv32/clone.s | 34 +++
+ src/thread/riscv32/syscall_cp.s | 29 +++
+ src/thread/riscv64/__set_thread_area.s | 6 +
+ src/thread/riscv64/__unmapself.s | 7 +
+ src/thread/riscv64/clone.s | 34 +++
+ src/thread/riscv64/syscall_cp.s | 29 +++
+ 103 files changed, 2489 insertions(+)
+ create mode 100644 arch/riscv32/atomic_arch.h
+ create mode 100644 arch/riscv32/bits/alltypes.h.in
+ create mode 100644 arch/riscv32/bits/endian.h
+ create mode 100644 arch/riscv32/bits/fcntl.h
+ create mode 100644 arch/riscv32/bits/fenv.h
+ create mode 100644 arch/riscv32/bits/float.h
+ create mode 100644 arch/riscv32/bits/ipc.h
+ create mode 100644 arch/riscv32/bits/limits.h
+ create mode 100644 arch/riscv32/bits/msg.h
+ create mode 100644 arch/riscv32/bits/posix.h
+ create mode 100644 arch/riscv32/bits/reg.h
+ create mode 100644 arch/riscv32/bits/sem.h
+ create mode 100644 arch/riscv32/bits/setjmp.h
+ create mode 100644 arch/riscv32/bits/shm.h
+ create mode 100644 arch/riscv32/bits/signal.h
+ create mode 100644 arch/riscv32/bits/socket.h
+ create mode 100644 arch/riscv32/bits/stat.h
+ create mode 100644 arch/riscv32/bits/stdint.h
+ create mode 100644 arch/riscv32/bits/syscall.h.in
+ create mode 100644 arch/riscv32/bits/user.h
+ create mode 100644 arch/riscv32/crt_arch.h
+ create mode 100644 arch/riscv32/pthread_arch.h
+ create mode 100644 arch/riscv32/reloc.h
+ create mode 100644 arch/riscv32/syscall_arch.h
+ create mode 100644 arch/riscv64/atomic_arch.h
+ create mode 100644 arch/riscv64/bits/alltypes.h.in
+ create mode 100644 arch/riscv64/bits/endian.h
+ create mode 100644 arch/riscv64/bits/fcntl.h
+ create mode 100644 arch/riscv64/bits/fenv.h
+ create mode 100644 arch/riscv64/bits/float.h
+ create mode 100644 arch/riscv64/bits/ipc.h
+ create mode 100644 arch/riscv64/bits/limits.h
+ create mode 100644 arch/riscv64/bits/mman.h
+ create mode 100644 arch/riscv64/bits/msg.h
+ create mode 100644 arch/riscv64/bits/posix.h
+ create mode 100644 arch/riscv64/bits/reg.h
+ create mode 100644 arch/riscv64/bits/sem.h
+ create mode 100644 arch/riscv64/bits/setjmp.h
+ create mode 100644 arch/riscv64/bits/shm.h
+ create mode 100644 arch/riscv64/bits/signal.h
+ create mode 100644 arch/riscv64/bits/socket.h
+ create mode 100644 arch/riscv64/bits/stat.h
+ create mode 100644 arch/riscv64/bits/stdint.h
+ create mode 100644 arch/riscv64/bits/syscall.h.in
+ create mode 100644 arch/riscv64/bits/user.h
+ create mode 100644 arch/riscv64/crt_arch.h
+ create mode 100644 arch/riscv64/pthread_arch.h
+ create mode 100644 arch/riscv64/reloc.h
+ create mode 100644 arch/riscv64/syscall_arch.h
+ create mode 100644 crt/riscv32/crti.s
+ create mode 100644 crt/riscv32/crtn.s
+ create mode 100644 crt/riscv64/crti.s
+ create mode 100644 crt/riscv64/crtn.s
+ create mode 100644 src/fenv/riscv32/fenv-sf.c
+ create mode 100644 src/fenv/riscv32/fenv.S
+ create mode 100644 src/fenv/riscv64/fenv-sf.c
+ create mode 100644 src/fenv/riscv64/fenv.S
+ create mode 100644 src/internal/riscv32/syscall.s
+ create mode 100644 src/internal/riscv64/syscall.s
+ create mode 100644 src/ldso/riscv32/dlsym.s
+ create mode 100644 src/ldso/riscv64/dlsym.s
+ create mode 100644 src/math/riscv32/copysign.s
+ create mode 100644 src/math/riscv32/copysignf.s
+ create mode 100644 src/math/riscv32/fabs.s
+ create mode 100644 src/math/riscv32/fabsf.s
+ create mode 100644 src/math/riscv32/fma.s
+ create mode 100644 src/math/riscv32/fmaf.s
+ create mode 100644 src/math/riscv32/fmax.s
+ create mode 100644 src/math/riscv32/fmaxf.s
+ create mode 100644 src/math/riscv32/fmin.s
+ create mode 100644 src/math/riscv32/fminf.s
+ create mode 100644 src/math/riscv32/sqrt.s
+ create mode 100644 src/math/riscv32/sqrtf.s
+ create mode 100644 src/math/riscv64/copysign.s
+ create mode 100644 src/math/riscv64/copysignf.s
+ create mode 100644 src/math/riscv64/fabs.s
+ create mode 100644 src/math/riscv64/fabsf.s
+ create mode 100644 src/math/riscv64/fma.s
+ create mode 100644 src/math/riscv64/fmaf.s
+ create mode 100644 src/math/riscv64/fmax.s
+ create mode 100644 src/math/riscv64/fmaxf.s
+ create mode 100644 src/math/riscv64/fmin.s
+ create mode 100644 src/math/riscv64/fminf.s
+ create mode 100644 src/math/riscv64/sqrt.s
+ create mode 100644 src/math/riscv64/sqrtf.s
+ create mode 100644 src/setjmp/riscv32/longjmp.S
+ create mode 100644 src/setjmp/riscv32/setjmp.S
+ create mode 100644 src/setjmp/riscv64/longjmp.S
+ create mode 100644 src/setjmp/riscv64/setjmp.S
+ create mode 100644 src/signal/riscv32/restore.s
+ create mode 100644 src/signal/riscv32/sigsetjmp.s
+ create mode 100644 src/signal/riscv64/restore.s
+ create mode 100644 src/signal/riscv64/sigsetjmp.s
+ create mode 100644 src/thread/riscv32/__set_thread_area.s
+ create mode 100644 src/thread/riscv32/__unmapself.s
+ create mode 100644 src/thread/riscv32/clone.s
+ create mode 100644 src/thread/riscv32/syscall_cp.s
+ create mode 100644 src/thread/riscv64/__set_thread_area.s
+ create mode 100644 src/thread/riscv64/__unmapself.s
+ create mode 100644 src/thread/riscv64/clone.s
+ create mode 100644 src/thread/riscv64/syscall_cp.s
+
+diff --git a/arch/riscv32/atomic_arch.h b/arch/riscv32/atomic_arch.h
+new file mode 100644
+index 00000000..93c89cc2
+--- /dev/null
++++ b/arch/riscv32/atomic_arch.h
+@@ -0,0 +1,35 @@
++#define a_barrier a_barrier
++static inline void a_barrier()
++{
++ __asm__ __volatile__ ("fence rw,rw" : : : "memory");
++}
++
++#define a_ll a_ll
++static inline int a_ll(volatile int *p)
++{
++ int v;
++ __asm__ __volatile__ ("lr.w %0, (%1)" : "=&r"(v) : "r"(p));
++ return v;
++}
++
++#define a_sc a_sc
++static inline int a_sc(volatile int *p, int v)
++{
++ int r;
++ __asm__ __volatile__ ("sc.w %0, %2, (%1)" : "=&r"(r) : "r"(p), "r"(v) : "memory");
++ return !r;
++}
++
++#define a_cas a_cas
++static inline int a_cas(volatile int *p, int t, int s)
++{
++ int old, tmp;
++ __asm__("1: lr.w %0, %2 \n"
++ " bne %0, %3, 1f \n"
++ " sc.w %1, %4, %2 \n"
++ " bnez %1, 1b \n"
++ "1: \n"
++ : "=&r"(old), "+r"(tmp), "+A"(*p)
++ : "r"(t), "r"(s));
++ return old;
++}
+diff --git a/arch/riscv32/bits/alltypes.h.in b/arch/riscv32/bits/alltypes.h.in
+new file mode 100644
+index 00000000..66ca18ad
+--- /dev/null
++++ b/arch/riscv32/bits/alltypes.h.in
+@@ -0,0 +1,26 @@
++#define _Addr int
++#define _Int64 long long
++#define _Reg int
++
++TYPEDEF __builtin_va_list va_list;
++TYPEDEF __builtin_va_list __isoc_va_list;
++
++#ifndef __cplusplus
++TYPEDEF int wchar_t;
++#endif
++
++TYPEDEF float float_t;
++TYPEDEF double double_t;
++
++TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
++
++TYPEDEF long time_t;
++TYPEDEF long suseconds_t;
++
++TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
++TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
++TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
++TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
++TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
++TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
++TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
+diff --git a/arch/riscv32/bits/endian.h b/arch/riscv32/bits/endian.h
+new file mode 100644
+index 00000000..7df0e02a
+--- /dev/null
++++ b/arch/riscv32/bits/endian.h
+@@ -0,0 +1,5 @@
++#if __RISCVEB__
++#define __BYTE_ORDER __BIG_ENDIAN
++#else
++#define __BYTE_ORDER __LITTLE_ENDIAN
++#endif
+diff --git a/arch/riscv32/bits/fcntl.h b/arch/riscv32/bits/fcntl.h
+new file mode 100644
+index 00000000..92787976
+--- /dev/null
++++ b/arch/riscv32/bits/fcntl.h
+@@ -0,0 +1,38 @@
++#define O_CREAT 0100
++#define O_EXCL 0200
++#define O_NOCTTY 0400
++#define O_TRUNC 01000
++#define O_APPEND 02000
++#define O_NONBLOCK 04000
++#define O_DSYNC 010000
++#define O_SYNC 04010000
++#define O_RSYNC 04010000
++#define O_DIRECTORY 040000
++#define O_NOFOLLOW 0100000
++#define O_CLOEXEC 02000000
++
++#define O_ASYNC 020000
++#define O_DIRECT 0200000
++#define O_LARGEFILE 0400000
++#define O_NOATIME 01000000
++#define O_PATH 010000000
++#define O_TMPFILE 020040000
++#define O_NDELAY O_NONBLOCK
++
++#define F_DUPFD 0
++#define F_GETFD 1
++#define F_SETFD 2
++#define F_GETFL 3
++#define F_SETFL 4
++#define F_GETLK 5
++#define F_SETLK 6
++#define F_SETLKW 7
++#define F_SETOWN 8
++#define F_GETOWN 9
++#define F_SETSIG 10
++#define F_GETSIG 11
++
++#define F_SETOWN_EX 15
++#define F_GETOWN_EX 16
++
++#define F_GETOWNER_UIDS 17
+diff --git a/arch/riscv32/bits/fenv.h b/arch/riscv32/bits/fenv.h
+new file mode 100644
+index 00000000..6ac43e4e
+--- /dev/null
++++ b/arch/riscv32/bits/fenv.h
+@@ -0,0 +1,18 @@
++#define FE_INVALID 16
++#define FE_DIVBYZERO 8
++#define FE_OVERFLOW 4
++#define FE_UNDERFLOW 2
++#define FE_INEXACT 1
++
++#define FE_ALL_EXCEPT 31
++
++#define FE_TONEAREST 0
++#define FE_DOWNWARD 2
++#define FE_UPWARD 3
++#define FE_TOWARDZERO 1
++
++typedef unsigned int fexcept_t;
++
++typedef unsigned int fenv_t;
++
++#define FE_DFL_ENV ((const fenv_t *) -1)
+diff --git a/arch/riscv32/bits/float.h b/arch/riscv32/bits/float.h
+new file mode 100644
+index 00000000..719c7908
+--- /dev/null
++++ b/arch/riscv32/bits/float.h
+@@ -0,0 +1,16 @@
++#define FLT_EVAL_METHOD 0
++
++#define LDBL_TRUE_MIN 6.47517511943802511092443895822764655e-4966L
++#define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
++#define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
++#define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
++
++#define LDBL_MANT_DIG 113
++#define LDBL_MIN_EXP (-16381)
++#define LDBL_MAX_EXP 16384
++
++#define LDBL_DIG 33
++#define LDBL_MIN_10_EXP (-4931)
++#define LDBL_MAX_10_EXP 4932
++
++#define DECIMAL_DIG 36
+diff --git a/arch/riscv32/bits/ipc.h b/arch/riscv32/bits/ipc.h
+new file mode 100644
+index 00000000..6f3328a8
+--- /dev/null
++++ b/arch/riscv32/bits/ipc.h
+@@ -0,0 +1,14 @@
++struct ipc_perm {
++ key_t __ipc_perm_key;
++ uid_t uid;
++ gid_t gid;
++ uid_t cuid;
++ gid_t cgid;
++ mode_t mode;
++ unsigned short __ipc_perm_seq;
++
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
++
++#define IPC_64 0
+diff --git a/arch/riscv32/bits/limits.h b/arch/riscv32/bits/limits.h
+new file mode 100644
+index 00000000..fbc6d238
+--- /dev/null
++++ b/arch/riscv32/bits/limits.h
+@@ -0,0 +1,7 @@
++#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
++ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++#define LONG_BIT 32
++#endif
++
++#define LONG_MAX 0x7fffffffL
++#define LLONG_MAX 0x7fffffffffffffffLL
+diff --git a/arch/riscv32/bits/msg.h b/arch/riscv32/bits/msg.h
+new file mode 100644
+index 00000000..641e1703
+--- /dev/null
++++ b/arch/riscv32/bits/msg.h
+@@ -0,0 +1,13 @@
++struct msqid_ds {
++ struct ipc_perm msg_perm;
++ time_t msg_stime;
++ time_t msg_rtime;
++ time_t msg_ctime;
++ unsigned long msg_cbytes;
++ msgqnum_t msg_qnum;
++ msglen_t msg_qbytes;
++ pid_t msg_lspid;
++ pid_t msg_lrpid;
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
+diff --git a/arch/riscv32/bits/posix.h b/arch/riscv32/bits/posix.h
+new file mode 100644
+index 00000000..7563df5d
+--- /dev/null
++++ b/arch/riscv32/bits/posix.h
+@@ -0,0 +1,2 @@
++# define _POSIX_V6_ILP32_OFFBIG 1
++# define _POSIX_V7_ILP32_OFFBIG 1
+diff --git a/arch/riscv32/bits/reg.h b/arch/riscv32/bits/reg.h
+new file mode 100644
+index 00000000..e0bf40d5
+--- /dev/null
++++ b/arch/riscv32/bits/reg.h
+@@ -0,0 +1,8 @@
++#undef __WORDSIZE
++#define __WORDSIZE 32
++#define REG_PC 0
++#define REG_RA 1
++#define REG_SP 2
++#define REG_TP 4
++#define REG_S0 8
++#define REG_A0 10
+diff --git a/arch/riscv32/bits/sem.h b/arch/riscv32/bits/sem.h
+new file mode 100644
+index 00000000..5f93c12d
+--- /dev/null
++++ b/arch/riscv32/bits/sem.h
+@@ -0,0 +1,9 @@
++struct semid_ds {
++ struct ipc_perm sem_perm;
++ time_t sem_otime;
++ time_t sem_ctime;
++ unsigned short sem_nsems;
++ char __sem_nsems_pad[sizeof(time_t)-sizeof(short)];
++ time_t __unused3;
++ time_t __unused4;
++};
+diff --git a/arch/riscv32/bits/setjmp.h b/arch/riscv32/bits/setjmp.h
+new file mode 100644
+index 00000000..ef6a017a
+--- /dev/null
++++ b/arch/riscv32/bits/setjmp.h
+@@ -0,0 +1 @@
++typedef unsigned long __jmp_buf[40];
+diff --git a/arch/riscv32/bits/shm.h b/arch/riscv32/bits/shm.h
+new file mode 100644
+index 00000000..f4b87126
+--- /dev/null
++++ b/arch/riscv32/bits/shm.h
+@@ -0,0 +1,26 @@
++#define SHMLBA 4096
++
++struct shmid_ds
++{
++ struct ipc_perm shm_perm;
++ size_t shm_segsz;
++ time_t shm_atime;
++ time_t shm_dtime;
++ time_t shm_ctime;
++ pid_t shm_cpid;
++ pid_t shm_lpid;
++ unsigned long shm_nattch;
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
++
++struct shminfo {
++ unsigned long shmmax, shmmin, shmmni, shmseg, shmall, __unused[4];
++};
++
++struct shm_info {
++ int __used_ids;
++ unsigned long shm_tot, shm_rss, shm_swp;
++ unsigned long __swap_attempts, __swap_successes;
++};
++
+diff --git a/arch/riscv32/bits/signal.h b/arch/riscv32/bits/signal.h
+new file mode 100644
+index 00000000..8b992cc8
+--- /dev/null
++++ b/arch/riscv32/bits/signal.h
+@@ -0,0 +1,113 @@
++#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
++ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++
++#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++# define MINSIGSTKSZ 2048
++# define SIGSTKSZ 8192
++#endif
++
++/* gregs[0] holds the program counter. */
++
++#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++typedef unsigned long greg_t;
++typedef unsigned long gregset_t[32];
++
++struct __riscv_f_ext_state {
++ unsigned int f[32];
++ unsigned int fcsr;
++};
++
++struct __riscv_d_ext_state {
++ unsigned long long f[32];
++ unsigned int fcsr;
++};
++
++struct __riscv_q_ext_state {
++ unsigned long long f[64] __attribute__((aligned(16)));
++ unsigned int fcsr;
++ unsigned int reserved[3];
++};
++
++union __riscv_fp_state {
++ struct __riscv_f_ext_state f;
++ struct __riscv_d_ext_state d;
++ struct __riscv_q_ext_state q;
++};
++
++typedef union __riscv_fp_state fpregset_t;
++
++typedef struct sigcontext {
++ gregset_t gregs;
++ fpregset_t fpregs;
++} mcontext_t;
++
++#else
++typedef struct {
++ unsigned long gregs[32];
++ unsigned long long fpregs[66];
++} mcontext_t;
++#endif
++
++struct sigaltstack {
++ void *ss_sp;
++ int ss_flags;
++ size_t ss_size;
++};
++
++typedef struct __ucontext
++{
++ unsigned long uc_flags;
++ struct __ucontext *uc_link;
++ stack_t uc_stack;
++ sigset_t uc_sigmask;
++ char __unused[1024 / 8 - sizeof(sigset_t)];
++ mcontext_t uc_mcontext;
++} ucontext_t;
++
++#define SA_NOCLDSTOP 1
++#define SA_NOCLDWAIT 2
++#define SA_SIGINFO 4
++#define SA_ONSTACK 0x08000000
++#define SA_RESTART 0x10000000
++#define SA_NODEFER 0x40000000
++#define SA_RESETHAND 0x80000000
++#define SA_RESTORER 0x04000000
++
++#endif
++
++#define SIGHUP 1
++#define SIGINT 2
++#define SIGQUIT 3
++#define SIGILL 4
++#define SIGTRAP 5
++#define SIGABRT 6
++#define SIGIOT SIGABRT
++#define SIGBUS 7
++#define SIGFPE 8
++#define SIGKILL 9
++#define SIGUSR1 10
++#define SIGSEGV 11
++#define SIGUSR2 12
++#define SIGPIPE 13
++#define SIGALRM 14
++#define SIGTERM 15
++#define SIGSTKFLT 16
++#define SIGCHLD 17
++#define SIGCONT 18
++#define SIGSTOP 19
++#define SIGTSTP 20
++#define SIGTTIN 21
++#define SIGTTOU 22
++#define SIGURG 23
++#define SIGXCPU 24
++#define SIGXFSZ 25
++#define SIGVTALRM 26
++#define SIGPROF 27
++#define SIGWINCH 28
++#define SIGIO 29
++#define SIGPOLL SIGIO
++#define SIGPWR 30
++#define SIGSYS 31
++#define SIGUNUSED SIGSYS
++
++#define _NSIG 65
+diff --git a/arch/riscv32/bits/socket.h b/arch/riscv32/bits/socket.h
+new file mode 100644
+index 00000000..c11677e9
+--- /dev/null
++++ b/arch/riscv32/bits/socket.h
+@@ -0,0 +1,33 @@
++#include <endian.h>
++
++struct msghdr {
++ void *msg_name;
++ socklen_t msg_namelen;
++ struct iovec *msg_iov;
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad1, msg_iovlen;
++#else
++ int msg_iovlen, __pad1;
++#endif
++ void *msg_control;
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad2;
++ socklen_t msg_controllen;
++#else
++ socklen_t msg_controllen;
++ int __pad2;
++#endif
++ int msg_flags;
++};
++
++struct cmsghdr {
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad1;
++ socklen_t cmsg_len;
++#else
++ socklen_t cmsg_len;
++ int __pad1;
++#endif
++ int cmsg_level;
++ int cmsg_type;
++};
+diff --git a/arch/riscv32/bits/stat.h b/arch/riscv32/bits/stat.h
+new file mode 100644
+index 00000000..b7f4221b
+--- /dev/null
++++ b/arch/riscv32/bits/stat.h
+@@ -0,0 +1,18 @@
++struct stat {
++ 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;
++ unsigned long __pad;
++ off_t st_size;
++ blksize_t st_blksize;
++ int __pad2;
++ blkcnt_t st_blocks;
++ struct timespec st_atim;
++ struct timespec st_mtim;
++ struct timespec st_ctim;
++ unsigned __unused[2];
++};
+diff --git a/arch/riscv32/bits/stdint.h b/arch/riscv32/bits/stdint.h
+new file mode 100644
+index 00000000..d1b27121
+--- /dev/null
++++ b/arch/riscv32/bits/stdint.h
+@@ -0,0 +1,20 @@
++typedef int32_t int_fast16_t;
++typedef int32_t int_fast32_t;
++typedef uint32_t uint_fast16_t;
++typedef uint32_t uint_fast32_t;
++
++#define INT_FAST16_MIN INT32_MIN
++#define INT_FAST32_MIN INT32_MIN
++
++#define INT_FAST16_MAX INT32_MAX
++#define INT_FAST32_MAX INT32_MAX
++
++#define UINT_FAST16_MAX UINT32_MAX
++#define UINT_FAST32_MAX UINT32_MAX
++
++#define INTPTR_MIN INT32_MIN
++#define INTPTR_MAX INT32_MAX
++#define UINTPTR_MAX UINT32_MAX
++#define PTRDIFF_MIN INT32_MIN
++#define PTRDIFF_MAX INT32_MAX
++#define SIZE_MAX UINT32_MAX
+diff --git a/arch/riscv32/bits/syscall.h.in b/arch/riscv32/bits/syscall.h.in
+new file mode 100644
+index 00000000..3c81c107
+--- /dev/null
++++ b/arch/riscv32/bits/syscall.h.in
+@@ -0,0 +1,278 @@
++#define __NR_io_setup 0
++#define __NR_io_destroy 1
++#define __NR_io_submit 2
++#define __NR_io_cancel 3
++#define __NR_io_getevents 4
++#define __NR_setxattr 5
++#define __NR_lsetxattr 6
++#define __NR_fsetxattr 7
++#define __NR_getxattr 8
++#define __NR_lgetxattr 9
++#define __NR_fgetxattr 10
++#define __NR_listxattr 11
++#define __NR_llistxattr 12
++#define __NR_flistxattr 13
++#define __NR_removexattr 14
++#define __NR_lremovexattr 15
++#define __NR_fremovexattr 16
++#define __NR_getcwd 17
++#define __NR_lookup_dcookie 18
++#define __NR_eventfd2 19
++#define __NR_epoll_create1 20
++#define __NR_epoll_ctl 21
++#define __NR_epoll_pwait 22
++#define __NR_dup 23
++#define __NR_dup3 24
++#define __NR_fcntl 25
++#define __NR_inotify_init1 26
++#define __NR_inotify_add_watch 27
++#define __NR_inotify_rm_watch 28
++#define __NR_ioctl 29
++#define __NR_ioprio_set 30
++#define __NR_ioprio_get 31
++#define __NR_flock 32
++#define __NR_mknodat 33
++#define __NR_mkdirat 34
++#define __NR_unlinkat 35
++#define __NR_symlinkat 36
++#define __NR_linkat 37
++#define __NR_renameat 38
++#define __NR_umount2 39
++#define __NR_mount 40
++#define __NR_pivot_root 41
++#define __NR_nfsservctl 42
++#define __NR_statfs 43
++#define __NR_fstatfs 44
++#define __NR_truncate 45
++#define __NR_ftruncate 46
++#define __NR_fallocate 47
++#define __NR_faccessat 48
++#define __NR_chdir 49
++#define __NR_fchdir 50
++#define __NR_chroot 51
++#define __NR_fchmod 52
++#define __NR_fchmodat 53
++#define __NR_fchownat 54
++#define __NR_fchown 55
++#define __NR_openat 56
++#define __NR_close 57
++#define __NR_vhangup 58
++#define __NR_pipe2 59
++#define __NR_quotactl 60
++#define __NR_getdents64 61
++#define __NR_lseek 62
++#define __NR_read 63
++#define __NR_write 64
++#define __NR_readv 65
++#define __NR_writev 66
++#define __NR_pread64 67
++#define __NR_pwrite64 68
++#define __NR_preadv 69
++#define __NR_pwritev 70
++#define __NR_sendfile 71
++#define __NR_pselect6 72
++#define __NR_ppoll 73
++#define __NR_signalfd4 74
++#define __NR_vmsplice 75
++#define __NR_splice 76
++#define __NR_tee 77
++#define __NR_readlinkat 78
++#define __NR_fstatat 79
++#define __NR_fstat 80
++#define __NR_sync 81
++#define __NR_fsync 82
++#define __NR_fdatasync 83
++#define __NR_sync_file_range 84
++#define __NR_timerfd_create 85
++#define __NR_timerfd_settime 86
++#define __NR_timerfd_gettime 87
++#define __NR_utimensat 88
++#define __NR_acct 89
++#define __NR_capget 90
++#define __NR_capset 91
++#define __NR_personality 92
++#define __NR_exit 93
++#define __NR_exit_group 94
++#define __NR_waitid 95
++#define __NR_set_tid_address 96
++#define __NR_unshare 97
++#define __NR_futex 98
++#define __NR_set_robust_list 99
++#define __NR_get_robust_list 100
++#define __NR_nanosleep 101
++#define __NR_getitimer 102
++#define __NR_setitimer 103
++#define __NR_kexec_load 104
++#define __NR_init_module 105
++#define __NR_delete_module 106
++#define __NR_timer_create 107
++#define __NR_timer_gettime 108
++#define __NR_timer_getoverrun 109
++#define __NR_timer_settime 110
++#define __NR_timer_delete 111
++#define __NR_clock_settime 112
++#define __NR_clock_gettime 113
++#define __NR_clock_getres 114
++#define __NR_clock_nanosleep 115
++#define __NR_syslog 116
++#define __NR_ptrace 117
++#define __NR_sched_setparam 118
++#define __NR_sched_setscheduler 119
++#define __NR_sched_getscheduler 120
++#define __NR_sched_getparam 121
++#define __NR_sched_setaffinity 122
++#define __NR_sched_getaffinity 123
++#define __NR_sched_yield 124
++#define __NR_sched_get_priority_max 125
++#define __NR_sched_get_priority_min 126
++#define __NR_sched_rr_get_interval 127
++#define __NR_restart_syscall 128
++#define __NR_kill 129
++#define __NR_tkill 130
++#define __NR_tgkill 131
++#define __NR_sigaltstack 132
++#define __NR_rt_sigsuspend 133
++#define __NR_rt_sigaction 134
++#define __NR_rt_sigprocmask 135
++#define __NR_rt_sigpending 136
++#define __NR_rt_sigtimedwait 137
++#define __NR_rt_sigqueueinfo 138
++#define __NR_rt_sigreturn 139
++#define __NR_setpriority 140
++#define __NR_getpriority 141
++#define __NR_reboot 142
++#define __NR_setregid 143
++#define __NR_setgid 144
++#define __NR_setreuid 145
++#define __NR_setuid 146
++#define __NR_setresuid 147
++#define __NR_getresuid 148
++#define __NR_setresgid 149
++#define __NR_getresgid 150
++#define __NR_setfsuid 151
++#define __NR_setfsgid 152
++#define __NR_times 153
++#define __NR_setpgid 154
++#define __NR_getpgid 155
++#define __NR_getsid 156
++#define __NR_setsid 157
++#define __NR_getgroups 158
++#define __NR_setgroups 159
++#define __NR_uname 160
++#define __NR_sethostname 161
++#define __NR_setdomainname 162
++#define __NR_getrlimit 163
++#define __NR_setrlimit 164
++#define __NR_getrusage 165
++#define __NR_umask 166
++#define __NR_prctl 167
++#define __NR_getcpu 168
++#define __NR_gettimeofday 169
++#define __NR_settimeofday 170
++#define __NR_adjtimex 171
++#define __NR_getpid 172
++#define __NR_getppid 173
++#define __NR_getuid 174
++#define __NR_geteuid 175
++#define __NR_getgid 176
++#define __NR_getegid 177
++#define __NR_gettid 178
++#define __NR_sysinfo 179
++#define __NR_mq_open 180
++#define __NR_mq_unlink 181
++#define __NR_mq_timedsend 182
++#define __NR_mq_timedreceive 183
++#define __NR_mq_notify 184
++#define __NR_mq_getsetattr 185
++#define __NR_msgget 186
++#define __NR_msgctl 187
++#define __NR_msgrcv 188
++#define __NR_msgsnd 189
++#define __NR_semget 190
++#define __NR_semctl 191
++#define __NR_semtimedop 192
++#define __NR_semop 193
++#define __NR_shmget 194
++#define __NR_shmctl 195
++#define __NR_shmat 196
++#define __NR_shmdt 197
++#define __NR_socket 198
++#define __NR_socketpair 199
++#define __NR_bind 200
++#define __NR_listen 201
++#define __NR_accept 202
++#define __NR_connect 203
++#define __NR_getsockname 204
++#define __NR_getpeername 205
++#define __NR_sendto 206
++#define __NR_recvfrom 207
++#define __NR_setsockopt 208
++#define __NR_getsockopt 209
++#define __NR_shutdown 210
++#define __NR_sendmsg 211
++#define __NR_recvmsg 212
++#define __NR_readahead 213
++#define __NR_brk 214
++#define __NR_munmap 215
++#define __NR_mremap 216
++#define __NR_add_key 217
++#define __NR_request_key 218
++#define __NR_keyctl 219
++#define __NR_clone 220
++#define __NR_execve 221
++#define __NR_mmap 222
++#define __NR_fadvise64 223
++#define __NR_swapon 224
++#define __NR_swapoff 225
++#define __NR_mprotect 226
++#define __NR_msync 227
++#define __NR_mlock 228
++#define __NR_munlock 229
++#define __NR_mlockall 230
++#define __NR_munlockall 231
++#define __NR_mincore 232
++#define __NR_madvise 233
++#define __NR_remap_file_pages 234
++#define __NR_mbind 235
++#define __NR_get_mempolicy 236
++#define __NR_set_mempolicy 237
++#define __NR_migrate_pages 238
++#define __NR_move_pages 239
++#define __NR_rt_tgsigqueueinfo 240
++#define __NR_perf_event_open 241
++#define __NR_accept4 242
++#define __NR_recvmmsg 243
++#define __NR_arch_specific_syscall 244
++#define __NR_wait4 260
++#define __NR_prlimit64 261
++#define __NR_fanotify_init 262
++#define __NR_fanotify_mark 263
++#define __NR_name_to_handle_at 264
++#define __NR_open_by_handle_at 265
++#define __NR_clock_adjtime 266
++#define __NR_syncfs 267
++#define __NR_setns 268
++#define __NR_sendmmsg 269
++#define __NR_process_vm_readv 270
++#define __NR_process_vm_writev 271
++#define __NR_kcmp 272
++#define __NR_finit_module 273
++#define __NR_sched_setattr 274
++#define __NR_sched_getattr 275
++#define __NR_renameat2 276
++#define __NR_seccomp 277
++#define __NR_getrandom 278
++#define __NR_memfd_create 279
++#define __NR_bpf 280
++#define __NR_execveat 281
++#define __NR_userfaultfd 282
++#define __NR_membarrier 283
++#define __NR_mlock2 284
++#define __NR_copy_file_range 285
++#define __NR_preadv2 286
++#define __NR_pwritev2 287
++#define __NR_pkey_mprotect 288
++#define __NR_pkey_alloc 289
++#define __NR_pkey_free 290
++#define __NR_sysriscv __NR_arch_specific_syscall
++
+diff --git a/arch/riscv32/bits/user.h b/arch/riscv32/bits/user.h
+new file mode 100644
+index 00000000..bd0f0fc7
+--- /dev/null
++++ b/arch/riscv32/bits/user.h
+@@ -0,0 +1,43 @@
++struct user_regs_struct {
++ unsigned long pc;
++ unsigned long ra;
++ unsigned long sp;
++ unsigned long gp;
++ unsigned long tp;
++ unsigned long t0;
++ unsigned long t1;
++ unsigned long t2;
++ unsigned long s0;
++ unsigned long s1;
++ unsigned long a0;
++ unsigned long a1;
++ unsigned long a2;
++ unsigned long a3;
++ unsigned long a4;
++ unsigned long a5;
++ unsigned long a6;
++ unsigned long a7;
++ unsigned long s2;
++ unsigned long s3;
++ unsigned long s4;
++ unsigned long s5;
++ unsigned long s6;
++ unsigned long s7;
++ unsigned long s8;
++ unsigned long s9;
++ unsigned long s10;
++ unsigned long s11;
++ unsigned long t3;
++ unsigned long t4;
++ unsigned long t5;
++ unsigned long t6;
++};
++
++struct user_fpregs_struct {
++ double f[32];
++ unsigned int fcsr;
++};
++
++#define ELF_NGREG 32
++typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
++typedef struct user_fpregs_struct elf_fpregset_t;
+diff --git a/arch/riscv32/crt_arch.h b/arch/riscv32/crt_arch.h
+new file mode 100644
+index 00000000..65187e19
+--- /dev/null
++++ b/arch/riscv32/crt_arch.h
+@@ -0,0 +1,18 @@
++__asm__(
++".text\n"
++".global " START "\n"
++".type " START ",%function\n"
++START ":\n"
++".weak __global_pointer$\n"
++".hidden __global_pointer$\n\t"
++".option push\n"
++".option norelax\n\t"
++"lla gp, __global_pointer$\n"
++".option pop\n\t"
++"mv a0, sp\n"
++".weak _DYNAMIC\n"
++".hidden _DYNAMIC\n\t"
++"lla a1, _DYNAMIC\n\t"
++"andi sp, sp, -16\n\t"
++"jal " START "_c"
++);
+diff --git a/arch/riscv32/pthread_arch.h b/arch/riscv32/pthread_arch.h
+new file mode 100644
+index 00000000..feffaa47
+--- /dev/null
++++ b/arch/riscv32/pthread_arch.h
+@@ -0,0 +1,12 @@
++static inline struct pthread *__pthread_self()
++{
++ char *tp;
++ __asm__ __volatile__("mv %0, tp" : "=r"(tp));
++ return (void *)(tp - sizeof(struct pthread));
++}
++
++#define TLS_ABOVE_TP
++#define GAP_ABOVE_TP 0
++#define TP_ADJ(p) ((char *)p + sizeof(struct pthread))
++
++#define MC_PC gregs[0]
+diff --git a/arch/riscv32/reloc.h b/arch/riscv32/reloc.h
+new file mode 100644
+index 00000000..d057bbee
+--- /dev/null
++++ b/arch/riscv32/reloc.h
+@@ -0,0 +1,27 @@
++#if defined __riscv_float_abi_soft
++#define RISCV_FP_SUFFIX "-sf"
++#elif defined __riscv_float_abi_single
++#define RISCV_FP_SUFFIX "-sp"
++#elif defined __riscv_float_abi_double
++#define RISCV_FP_SUFFIX ""
++#endif
++
++#define RISCV_LDSO_HELPER(x) "riscv" #x
++#define RISCV_LDSO(x) RISCV_LDSO_HELPER(x)
++
++#define LDSO_ARCH RISCV_LDSO(__riscv_xlen) RISCV_FP_SUFFIX
++
++#define NO_LEGACY_INITFINI
++
++#define TPOFF_K 0
++
++#define REL_SYMBOLIC R_RISCV_32
++#define REL_PLT R_RISCV_JUMP_SLOT
++#define REL_RELATIVE R_RISCV_RELATIVE
++#define REL_COPY R_RISCV_COPY
++#define REL_DTPMOD R_RISCV_TLS_DTPMOD32
++#define REL_DTPOFF R_RISCV_TLS_DTPREL32
++#define REL_TPOFF R_RISCV_TLS_TPREL32
++
++#define CRTJMP(pc,sp) __asm__ __volatile__( \
++ "mv sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
+diff --git a/arch/riscv32/syscall_arch.h b/arch/riscv32/syscall_arch.h
+new file mode 100644
+index 00000000..bc60d1f6
+--- /dev/null
++++ b/arch/riscv32/syscall_arch.h
+@@ -0,0 +1,78 @@
++#define __SYSCALL_LL_E(x) \
++((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
++((union { long long ll; long l[2]; }){ .ll = x }).l[1]
++#define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
++
++#define __asm_syscall(...) \
++ __asm__ __volatile__ ("scall\n\t" \
++ : "+r"(a0) : __VA_ARGS__ : "memory"); \
++ return a0; \
++
++static inline long __syscall0(long n)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0");
++ __asm_syscall("r"(a7))
++}
++
++static inline long __syscall1(long n, long a)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ __asm_syscall("r"(a7), "0"(a0))
++}
++
++static inline long __syscall2(long n, long a, long b)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1))
++}
++
++static inline long __syscall3(long n, long a, long b, long c)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2))
++}
++
++static inline long __syscall4(long n, long a, long b, long c, long d)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3))
++}
++
++static inline long __syscall5(long n, long a, long b, long c, long d, long e)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ register long a4 __asm__("a4") = e;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4))
++}
++
++static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ register long a4 __asm__("a4") = e;
++ register long a5 __asm__("a5") = f;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5))
++}
++
++#define VDSO_USEFUL
++/* We don't have a clock_gettime function.
++#define VDSO_CGT_SYM "__vdso_clock_gettime"
++#define VDSO_CGT_VER "LINUX_2.6" */
+diff --git a/arch/riscv64/atomic_arch.h b/arch/riscv64/atomic_arch.h
+new file mode 100644
+index 00000000..018c7fd2
+--- /dev/null
++++ b/arch/riscv64/atomic_arch.h
+@@ -0,0 +1,66 @@
++#define a_barrier a_barrier
++static inline void a_barrier()
++{
++ __asm__ __volatile__ ("fence rw,rw" : : : "memory");
++}
++
++#define a_ll a_ll
++static inline int a_ll(volatile int *p)
++{
++ int v;
++ __asm__ __volatile__ ("lr.w %0, %1" : "=&r"(v), "+A"(*p));
++ return v;
++}
++
++#define a_sc a_sc
++static inline int a_sc(volatile int *p, int v)
++{
++ int r;
++ __asm__ __volatile__ ("sc.w %0, %2, %1" : "=&r"(r), "+A"(*p) : "r"(v) : "memory");
++return !r;
++}
++
++#define a_cas a_cas
++static inline int a_cas(volatile int *p, int t, int s)
++{
++ int old, tmp;
++ __asm__("1: lr.w %0, %2 \n"
++ " bne %0, %3, 1f \n"
++ " sc.w %1, %4, %2 \n"
++ " bnez %1, 1b \n"
++ "1: \n"
++ : "=&r"(old), "+r"(tmp), "+A"(*p)
++ : "r"(t), "r"(s));
++ return old;
++}
++
++#define a_ll_p a_ll_p
++static inline void *a_ll_p(volatile void *p)
++{
++ void *v;
++ __asm__ __volatile__ ("lr.d %0, %1" : "=&r"(v), "+A"(*(long *)p));
++ return v;
++}
++
++#define a_sc_p a_sc_p
++static inline int a_sc_p(volatile int *p, void *v)
++{
++ int r;
++ __asm__ __volatile__ ("sc.d %0, %2, %1" : "=&r"(r), "+A"(*(long *)p) : "r"(v) : "memory");
++ return !r;
++}
++
++#define a_cas_p a_cas_p
++static inline void *a_cas_p(volatile void *p, void *t, void *s)
++{
++ void *old;
++ int tmp;
++ __asm__("1: lr.d %0, %2 \n"
++ " bne %0, %3, 1f \n"
++ " sc.d %1, %4, %2 \n"
++ " bnez %1, 1b \n"
++ "1: \n"
++ : "=&r"(old), "+r"(tmp), "+A"(*(long *)p)
++ : "r"(t), "r"(s));
++ return old;
++}
+diff --git a/arch/riscv64/bits/alltypes.h.in b/arch/riscv64/bits/alltypes.h.in
+new file mode 100644
+index 00000000..ae9ba41d
+--- /dev/null
++++ b/arch/riscv64/bits/alltypes.h.in
+@@ -0,0 +1,29 @@
++#define _Addr long
++#define _Int64 long
++#define _Reg long
++
++TYPEDEF __builtin_va_list va_list;
++TYPEDEF __builtin_va_list __isoc_va_list;
++
++#ifndef __cplusplus
++TYPEDEF int wchar_t;
++#endif
++
++TYPEDEF int blksize_t;
++TYPEDEF unsigned int nlink_t;
++
++TYPEDEF float float_t;
++TYPEDEF double double_t;
++
++TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
++
++TYPEDEF long time_t;
++TYPEDEF long suseconds_t;
++
++TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; unsigned long __s[7]; } __u; } pthread_attr_t;
++TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } pthread_mutex_t;
++TYPEDEF struct { union { int __i[10]; volatile int __vi[10]; volatile void *volatile __p[5]; } __u; } mtx_t;
++TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } pthread_cond_t;
++TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[6]; } __u; } cnd_t;
++TYPEDEF struct { union { int __i[14]; volatile int __vi[14]; void *__p[7]; } __u; } pthread_rwlock_t;
++TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[4]; } __u; } pthread_barrier_t;
+diff --git a/arch/riscv64/bits/endian.h b/arch/riscv64/bits/endian.h
+new file mode 100644
+index 00000000..7df0e02a
+--- /dev/null
++++ b/arch/riscv64/bits/endian.h
+@@ -0,0 +1,5 @@
++#if __RISCVEB__
++#define __BYTE_ORDER __BIG_ENDIAN
++#else
++#define __BYTE_ORDER __LITTLE_ENDIAN
++#endif
+diff --git a/arch/riscv64/bits/fcntl.h b/arch/riscv64/bits/fcntl.h
+new file mode 100644
+index 00000000..92787976
+--- /dev/null
++++ b/arch/riscv64/bits/fcntl.h
+@@ -0,0 +1,38 @@
++#define O_CREAT 0100
++#define O_EXCL 0200
++#define O_NOCTTY 0400
++#define O_TRUNC 01000
++#define O_APPEND 02000
++#define O_NONBLOCK 04000
++#define O_DSYNC 010000
++#define O_SYNC 04010000
++#define O_RSYNC 04010000
++#define O_DIRECTORY 040000
++#define O_NOFOLLOW 0100000
++#define O_CLOEXEC 02000000
++
++#define O_ASYNC 020000
++#define O_DIRECT 0200000
++#define O_LARGEFILE 0400000
++#define O_NOATIME 01000000
++#define O_PATH 010000000
++#define O_TMPFILE 020040000
++#define O_NDELAY O_NONBLOCK
++
++#define F_DUPFD 0
++#define F_GETFD 1
++#define F_SETFD 2
++#define F_GETFL 3
++#define F_SETFL 4
++#define F_GETLK 5
++#define F_SETLK 6
++#define F_SETLKW 7
++#define F_SETOWN 8
++#define F_GETOWN 9
++#define F_SETSIG 10
++#define F_GETSIG 11
++
++#define F_SETOWN_EX 15
++#define F_GETOWN_EX 16
++
++#define F_GETOWNER_UIDS 17
+diff --git a/arch/riscv64/bits/fenv.h b/arch/riscv64/bits/fenv.h
+new file mode 100644
+index 00000000..806ec40f
+--- /dev/null
++++ b/arch/riscv64/bits/fenv.h
+@@ -0,0 +1,17 @@
++#define FE_INVALID 16
++#define FE_DIVBYZERO 8
++#define FE_OVERFLOW 4
++#define FE_UNDERFLOW 2
++#define FE_INEXACT 1
++
++#define FE_ALL_EXCEPT 31
++
++#define FE_TONEAREST 0
++#define FE_DOWNWARD 2
++#define FE_UPWARD 3
++#define FE_TOWARDZERO 1
++
++typedef unsigned int fexcept_t;
++typedef unsigned int fenv_t;
++
++#define FE_DFL_ENV ((const fenv_t *) -1)
+diff --git a/arch/riscv64/bits/float.h b/arch/riscv64/bits/float.h
+new file mode 100644
+index 00000000..719c7908
+--- /dev/null
++++ b/arch/riscv64/bits/float.h
+@@ -0,0 +1,16 @@
++#define FLT_EVAL_METHOD 0
++
++#define LDBL_TRUE_MIN 6.47517511943802511092443895822764655e-4966L
++#define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
++#define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
++#define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
++
++#define LDBL_MANT_DIG 113
++#define LDBL_MIN_EXP (-16381)
++#define LDBL_MAX_EXP 16384
++
++#define LDBL_DIG 33
++#define LDBL_MIN_10_EXP (-4931)
++#define LDBL_MAX_10_EXP 4932
++
++#define DECIMAL_DIG 36
+diff --git a/arch/riscv64/bits/ipc.h b/arch/riscv64/bits/ipc.h
+new file mode 100644
+index 00000000..6f3328a8
+--- /dev/null
++++ b/arch/riscv64/bits/ipc.h
+@@ -0,0 +1,14 @@
++struct ipc_perm {
++ key_t __ipc_perm_key;
++ uid_t uid;
++ gid_t gid;
++ uid_t cuid;
++ gid_t cgid;
++ mode_t mode;
++ unsigned short __ipc_perm_seq;
++
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
++
++#define IPC_64 0
+diff --git a/arch/riscv64/bits/limits.h b/arch/riscv64/bits/limits.h
+new file mode 100644
+index 00000000..0226588c
+--- /dev/null
++++ b/arch/riscv64/bits/limits.h
+@@ -0,0 +1,7 @@
++#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
++ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++#define LONG_BIT 64
++#endif
++
++#define LONG_MAX 0x7fffffffffffffffL
++#define LLONG_MAX 0x7fffffffffffffffLL
+diff --git a/arch/riscv64/bits/mman.h b/arch/riscv64/bits/mman.h
+new file mode 100644
+index 00000000..36950573
+--- /dev/null
++++ b/arch/riscv64/bits/mman.h
+@@ -0,0 +1 @@
++#define MAP_32BIT 0x40
+diff --git a/arch/riscv64/bits/msg.h b/arch/riscv64/bits/msg.h
+new file mode 100644
+index 00000000..641e1703
+--- /dev/null
++++ b/arch/riscv64/bits/msg.h
+@@ -0,0 +1,13 @@
++struct msqid_ds {
++ struct ipc_perm msg_perm;
++ time_t msg_stime;
++ time_t msg_rtime;
++ time_t msg_ctime;
++ unsigned long msg_cbytes;
++ msgqnum_t msg_qnum;
++ msglen_t msg_qbytes;
++ pid_t msg_lspid;
++ pid_t msg_lrpid;
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
+diff --git a/arch/riscv64/bits/posix.h b/arch/riscv64/bits/posix.h
+new file mode 100644
+index 00000000..8068ce98
+--- /dev/null
++++ b/arch/riscv64/bits/posix.h
+@@ -0,0 +1,2 @@
++#define _POSIX_V6_LP64_OFF64 1
++#define _POSIX_V7_LP64_OFF64 1
+diff --git a/arch/riscv64/bits/reg.h b/arch/riscv64/bits/reg.h
+new file mode 100644
+index 00000000..c800788c
+--- /dev/null
++++ b/arch/riscv64/bits/reg.h
+@@ -0,0 +1,8 @@
++#undef __WORDSIZE
++#define __WORDSIZE 64
++#define REG_PC 0
++#define REG_RA 1
++#define REG_SP 2
++#define REG_TP 4
++#define REG_S0 8
++#define REG_A0 10
+diff --git a/arch/riscv64/bits/sem.h b/arch/riscv64/bits/sem.h
+new file mode 100644
+index 00000000..5f93c12d
+--- /dev/null
++++ b/arch/riscv64/bits/sem.h
+@@ -0,0 +1,9 @@
++struct semid_ds {
++ struct ipc_perm sem_perm;
++ time_t sem_otime;
++ time_t sem_ctime;
++ unsigned short sem_nsems;
++ char __sem_nsems_pad[sizeof(time_t)-sizeof(short)];
++ time_t __unused3;
++ time_t __unused4;
++};
+diff --git a/arch/riscv64/bits/setjmp.h b/arch/riscv64/bits/setjmp.h
+new file mode 100644
+index 00000000..b6cdc8e8
+--- /dev/null
++++ b/arch/riscv64/bits/setjmp.h
+@@ -0,0 +1 @@
++typedef unsigned long __jmp_buf[28];
+diff --git a/arch/riscv64/bits/shm.h b/arch/riscv64/bits/shm.h
+new file mode 100644
+index 00000000..f4b87126
+--- /dev/null
++++ b/arch/riscv64/bits/shm.h
+@@ -0,0 +1,26 @@
++#define SHMLBA 4096
++
++struct shmid_ds
++{
++ struct ipc_perm shm_perm;
++ size_t shm_segsz;
++ time_t shm_atime;
++ time_t shm_dtime;
++ time_t shm_ctime;
++ pid_t shm_cpid;
++ pid_t shm_lpid;
++ unsigned long shm_nattch;
++ unsigned long __pad1;
++ unsigned long __pad2;
++};
++
++struct shminfo {
++ unsigned long shmmax, shmmin, shmmni, shmseg, shmall, __unused[4];
++};
++
++struct shm_info {
++ int __used_ids;
++ unsigned long shm_tot, shm_rss, shm_swp;
++ unsigned long __swap_attempts, __swap_successes;
++};
++
+diff --git a/arch/riscv64/bits/signal.h b/arch/riscv64/bits/signal.h
+new file mode 100644
+index 00000000..8b992cc8
+--- /dev/null
++++ b/arch/riscv64/bits/signal.h
+@@ -0,0 +1,113 @@
++#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
++ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++
++#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++# define MINSIGSTKSZ 2048
++# define SIGSTKSZ 8192
++#endif
++
++/* gregs[0] holds the program counter. */
++
++#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
++typedef unsigned long greg_t;
++typedef unsigned long gregset_t[32];
++
++struct __riscv_f_ext_state {
++ unsigned int f[32];
++ unsigned int fcsr;
++};
++
++struct __riscv_d_ext_state {
++ unsigned long long f[32];
++ unsigned int fcsr;
++};
++
++struct __riscv_q_ext_state {
++ unsigned long long f[64] __attribute__((aligned(16)));
++ unsigned int fcsr;
++ unsigned int reserved[3];
++};
++
++union __riscv_fp_state {
++ struct __riscv_f_ext_state f;
++ struct __riscv_d_ext_state d;
++ struct __riscv_q_ext_state q;
++};
++
++typedef union __riscv_fp_state fpregset_t;
++
++typedef struct sigcontext {
++ gregset_t gregs;
++ fpregset_t fpregs;
++} mcontext_t;
++
++#else
++typedef struct {
++ unsigned long gregs[32];
++ unsigned long long fpregs[66];
++} mcontext_t;
++#endif
++
++struct sigaltstack {
++ void *ss_sp;
++ int ss_flags;
++ size_t ss_size;
++};
++
++typedef struct __ucontext
++{
++ unsigned long uc_flags;
++ struct __ucontext *uc_link;
++ stack_t uc_stack;
++ sigset_t uc_sigmask;
++ char __unused[1024 / 8 - sizeof(sigset_t)];
++ mcontext_t uc_mcontext;
++} ucontext_t;
++
++#define SA_NOCLDSTOP 1
++#define SA_NOCLDWAIT 2
++#define SA_SIGINFO 4
++#define SA_ONSTACK 0x08000000
++#define SA_RESTART 0x10000000
++#define SA_NODEFER 0x40000000
++#define SA_RESETHAND 0x80000000
++#define SA_RESTORER 0x04000000
++
++#endif
++
++#define SIGHUP 1
++#define SIGINT 2
++#define SIGQUIT 3
++#define SIGILL 4
++#define SIGTRAP 5
++#define SIGABRT 6
++#define SIGIOT SIGABRT
++#define SIGBUS 7
++#define SIGFPE 8
++#define SIGKILL 9
++#define SIGUSR1 10
++#define SIGSEGV 11
++#define SIGUSR2 12
++#define SIGPIPE 13
++#define SIGALRM 14
++#define SIGTERM 15
++#define SIGSTKFLT 16
++#define SIGCHLD 17
++#define SIGCONT 18
++#define SIGSTOP 19
++#define SIGTSTP 20
++#define SIGTTIN 21
++#define SIGTTOU 22
++#define SIGURG 23
++#define SIGXCPU 24
++#define SIGXFSZ 25
++#define SIGVTALRM 26
++#define SIGPROF 27
++#define SIGWINCH 28
++#define SIGIO 29
++#define SIGPOLL SIGIO
++#define SIGPWR 30
++#define SIGSYS 31
++#define SIGUNUSED SIGSYS
++
++#define _NSIG 65
+diff --git a/arch/riscv64/bits/socket.h b/arch/riscv64/bits/socket.h
+new file mode 100644
+index 00000000..c11677e9
+--- /dev/null
++++ b/arch/riscv64/bits/socket.h
+@@ -0,0 +1,33 @@
++#include <endian.h>
++
++struct msghdr {
++ void *msg_name;
++ socklen_t msg_namelen;
++ struct iovec *msg_iov;
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad1, msg_iovlen;
++#else
++ int msg_iovlen, __pad1;
++#endif
++ void *msg_control;
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad2;
++ socklen_t msg_controllen;
++#else
++ socklen_t msg_controllen;
++ int __pad2;
++#endif
++ int msg_flags;
++};
++
++struct cmsghdr {
++#if __BYTE_ORDER == __BIG_ENDIAN
++ int __pad1;
++ socklen_t cmsg_len;
++#else
++ socklen_t cmsg_len;
++ int __pad1;
++#endif
++ int cmsg_level;
++ int cmsg_type;
++};
+diff --git a/arch/riscv64/bits/stat.h b/arch/riscv64/bits/stat.h
+new file mode 100644
+index 00000000..b7f4221b
+--- /dev/null
++++ b/arch/riscv64/bits/stat.h
+@@ -0,0 +1,18 @@
++struct stat {
++ 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;
++ unsigned long __pad;
++ off_t st_size;
++ blksize_t st_blksize;
++ int __pad2;
++ blkcnt_t st_blocks;
++ struct timespec st_atim;
++ struct timespec st_mtim;
++ struct timespec st_ctim;
++ unsigned __unused[2];
++};
+diff --git a/arch/riscv64/bits/stdint.h b/arch/riscv64/bits/stdint.h
+new file mode 100644
+index 00000000..1bb147f2
+--- /dev/null
++++ b/arch/riscv64/bits/stdint.h
+@@ -0,0 +1,20 @@
++typedef int32_t int_fast16_t;
++typedef int32_t int_fast32_t;
++typedef uint32_t uint_fast16_t;
++typedef uint32_t uint_fast32_t;
++
++#define INT_FAST16_MIN INT32_MIN
++#define INT_FAST32_MIN INT32_MIN
++
++#define INT_FAST16_MAX INT32_MAX
++#define INT_FAST32_MAX INT32_MAX
++
++#define UINT_FAST16_MAX UINT32_MAX
++#define UINT_FAST32_MAX UINT32_MAX
++
++#define INTPTR_MIN INT64_MIN
++#define INTPTR_MAX INT64_MAX
++#define UINTPTR_MAX UINT64_MAX
++#define PTRDIFF_MIN INT64_MIN
++#define PTRDIFF_MAX INT64_MAX
++#define SIZE_MAX UINT64_MAX
+diff --git a/arch/riscv64/bits/syscall.h.in b/arch/riscv64/bits/syscall.h.in
+new file mode 100644
+index 00000000..3c81c107
+--- /dev/null
++++ b/arch/riscv64/bits/syscall.h.in
+@@ -0,0 +1,278 @@
++#define __NR_io_setup 0
++#define __NR_io_destroy 1
++#define __NR_io_submit 2
++#define __NR_io_cancel 3
++#define __NR_io_getevents 4
++#define __NR_setxattr 5
++#define __NR_lsetxattr 6
++#define __NR_fsetxattr 7
++#define __NR_getxattr 8
++#define __NR_lgetxattr 9
++#define __NR_fgetxattr 10
++#define __NR_listxattr 11
++#define __NR_llistxattr 12
++#define __NR_flistxattr 13
++#define __NR_removexattr 14
++#define __NR_lremovexattr 15
++#define __NR_fremovexattr 16
++#define __NR_getcwd 17
++#define __NR_lookup_dcookie 18
++#define __NR_eventfd2 19
++#define __NR_epoll_create1 20
++#define __NR_epoll_ctl 21
++#define __NR_epoll_pwait 22
++#define __NR_dup 23
++#define __NR_dup3 24
++#define __NR_fcntl 25
++#define __NR_inotify_init1 26
++#define __NR_inotify_add_watch 27
++#define __NR_inotify_rm_watch 28
++#define __NR_ioctl 29
++#define __NR_ioprio_set 30
++#define __NR_ioprio_get 31
++#define __NR_flock 32
++#define __NR_mknodat 33
++#define __NR_mkdirat 34
++#define __NR_unlinkat 35
++#define __NR_symlinkat 36
++#define __NR_linkat 37
++#define __NR_renameat 38
++#define __NR_umount2 39
++#define __NR_mount 40
++#define __NR_pivot_root 41
++#define __NR_nfsservctl 42
++#define __NR_statfs 43
++#define __NR_fstatfs 44
++#define __NR_truncate 45
++#define __NR_ftruncate 46
++#define __NR_fallocate 47
++#define __NR_faccessat 48
++#define __NR_chdir 49
++#define __NR_fchdir 50
++#define __NR_chroot 51
++#define __NR_fchmod 52
++#define __NR_fchmodat 53
++#define __NR_fchownat 54
++#define __NR_fchown 55
++#define __NR_openat 56
++#define __NR_close 57
++#define __NR_vhangup 58
++#define __NR_pipe2 59
++#define __NR_quotactl 60
++#define __NR_getdents64 61
++#define __NR_lseek 62
++#define __NR_read 63
++#define __NR_write 64
++#define __NR_readv 65
++#define __NR_writev 66
++#define __NR_pread64 67
++#define __NR_pwrite64 68
++#define __NR_preadv 69
++#define __NR_pwritev 70
++#define __NR_sendfile 71
++#define __NR_pselect6 72
++#define __NR_ppoll 73
++#define __NR_signalfd4 74
++#define __NR_vmsplice 75
++#define __NR_splice 76
++#define __NR_tee 77
++#define __NR_readlinkat 78
++#define __NR_fstatat 79
++#define __NR_fstat 80
++#define __NR_sync 81
++#define __NR_fsync 82
++#define __NR_fdatasync 83
++#define __NR_sync_file_range 84
++#define __NR_timerfd_create 85
++#define __NR_timerfd_settime 86
++#define __NR_timerfd_gettime 87
++#define __NR_utimensat 88
++#define __NR_acct 89
++#define __NR_capget 90
++#define __NR_capset 91
++#define __NR_personality 92
++#define __NR_exit 93
++#define __NR_exit_group 94
++#define __NR_waitid 95
++#define __NR_set_tid_address 96
++#define __NR_unshare 97
++#define __NR_futex 98
++#define __NR_set_robust_list 99
++#define __NR_get_robust_list 100
++#define __NR_nanosleep 101
++#define __NR_getitimer 102
++#define __NR_setitimer 103
++#define __NR_kexec_load 104
++#define __NR_init_module 105
++#define __NR_delete_module 106
++#define __NR_timer_create 107
++#define __NR_timer_gettime 108
++#define __NR_timer_getoverrun 109
++#define __NR_timer_settime 110
++#define __NR_timer_delete 111
++#define __NR_clock_settime 112
++#define __NR_clock_gettime 113
++#define __NR_clock_getres 114
++#define __NR_clock_nanosleep 115
++#define __NR_syslog 116
++#define __NR_ptrace 117
++#define __NR_sched_setparam 118
++#define __NR_sched_setscheduler 119
++#define __NR_sched_getscheduler 120
++#define __NR_sched_getparam 121
++#define __NR_sched_setaffinity 122
++#define __NR_sched_getaffinity 123
++#define __NR_sched_yield 124
++#define __NR_sched_get_priority_max 125
++#define __NR_sched_get_priority_min 126
++#define __NR_sched_rr_get_interval 127
++#define __NR_restart_syscall 128
++#define __NR_kill 129
++#define __NR_tkill 130
++#define __NR_tgkill 131
++#define __NR_sigaltstack 132
++#define __NR_rt_sigsuspend 133
++#define __NR_rt_sigaction 134
++#define __NR_rt_sigprocmask 135
++#define __NR_rt_sigpending 136
++#define __NR_rt_sigtimedwait 137
++#define __NR_rt_sigqueueinfo 138
++#define __NR_rt_sigreturn 139
++#define __NR_setpriority 140
++#define __NR_getpriority 141
++#define __NR_reboot 142
++#define __NR_setregid 143
++#define __NR_setgid 144
++#define __NR_setreuid 145
++#define __NR_setuid 146
++#define __NR_setresuid 147
++#define __NR_getresuid 148
++#define __NR_setresgid 149
++#define __NR_getresgid 150
++#define __NR_setfsuid 151
++#define __NR_setfsgid 152
++#define __NR_times 153
++#define __NR_setpgid 154
++#define __NR_getpgid 155
++#define __NR_getsid 156
++#define __NR_setsid 157
++#define __NR_getgroups 158
++#define __NR_setgroups 159
++#define __NR_uname 160
++#define __NR_sethostname 161
++#define __NR_setdomainname 162
++#define __NR_getrlimit 163
++#define __NR_setrlimit 164
++#define __NR_getrusage 165
++#define __NR_umask 166
++#define __NR_prctl 167
++#define __NR_getcpu 168
++#define __NR_gettimeofday 169
++#define __NR_settimeofday 170
++#define __NR_adjtimex 171
++#define __NR_getpid 172
++#define __NR_getppid 173
++#define __NR_getuid 174
++#define __NR_geteuid 175
++#define __NR_getgid 176
++#define __NR_getegid 177
++#define __NR_gettid 178
++#define __NR_sysinfo 179
++#define __NR_mq_open 180
++#define __NR_mq_unlink 181
++#define __NR_mq_timedsend 182
++#define __NR_mq_timedreceive 183
++#define __NR_mq_notify 184
++#define __NR_mq_getsetattr 185
++#define __NR_msgget 186
++#define __NR_msgctl 187
++#define __NR_msgrcv 188
++#define __NR_msgsnd 189
++#define __NR_semget 190
++#define __NR_semctl 191
++#define __NR_semtimedop 192
++#define __NR_semop 193
++#define __NR_shmget 194
++#define __NR_shmctl 195
++#define __NR_shmat 196
++#define __NR_shmdt 197
++#define __NR_socket 198
++#define __NR_socketpair 199
++#define __NR_bind 200
++#define __NR_listen 201
++#define __NR_accept 202
++#define __NR_connect 203
++#define __NR_getsockname 204
++#define __NR_getpeername 205
++#define __NR_sendto 206
++#define __NR_recvfrom 207
++#define __NR_setsockopt 208
++#define __NR_getsockopt 209
++#define __NR_shutdown 210
++#define __NR_sendmsg 211
++#define __NR_recvmsg 212
++#define __NR_readahead 213
++#define __NR_brk 214
++#define __NR_munmap 215
++#define __NR_mremap 216
++#define __NR_add_key 217
++#define __NR_request_key 218
++#define __NR_keyctl 219
++#define __NR_clone 220
++#define __NR_execve 221
++#define __NR_mmap 222
++#define __NR_fadvise64 223
++#define __NR_swapon 224
++#define __NR_swapoff 225
++#define __NR_mprotect 226
++#define __NR_msync 227
++#define __NR_mlock 228
++#define __NR_munlock 229
++#define __NR_mlockall 230
++#define __NR_munlockall 231
++#define __NR_mincore 232
++#define __NR_madvise 233
++#define __NR_remap_file_pages 234
++#define __NR_mbind 235
++#define __NR_get_mempolicy 236
++#define __NR_set_mempolicy 237
++#define __NR_migrate_pages 238
++#define __NR_move_pages 239
++#define __NR_rt_tgsigqueueinfo 240
++#define __NR_perf_event_open 241
++#define __NR_accept4 242
++#define __NR_recvmmsg 243
++#define __NR_arch_specific_syscall 244
++#define __NR_wait4 260
++#define __NR_prlimit64 261
++#define __NR_fanotify_init 262
++#define __NR_fanotify_mark 263
++#define __NR_name_to_handle_at 264
++#define __NR_open_by_handle_at 265
++#define __NR_clock_adjtime 266
++#define __NR_syncfs 267
++#define __NR_setns 268
++#define __NR_sendmmsg 269
++#define __NR_process_vm_readv 270
++#define __NR_process_vm_writev 271
++#define __NR_kcmp 272
++#define __NR_finit_module 273
++#define __NR_sched_setattr 274
++#define __NR_sched_getattr 275
++#define __NR_renameat2 276
++#define __NR_seccomp 277
++#define __NR_getrandom 278
++#define __NR_memfd_create 279
++#define __NR_bpf 280
++#define __NR_execveat 281
++#define __NR_userfaultfd 282
++#define __NR_membarrier 283
++#define __NR_mlock2 284
++#define __NR_copy_file_range 285
++#define __NR_preadv2 286
++#define __NR_pwritev2 287
++#define __NR_pkey_mprotect 288
++#define __NR_pkey_alloc 289
++#define __NR_pkey_free 290
++#define __NR_sysriscv __NR_arch_specific_syscall
++
+diff --git a/arch/riscv64/bits/user.h b/arch/riscv64/bits/user.h
+new file mode 100644
+index 00000000..bd0f0fc7
+--- /dev/null
++++ b/arch/riscv64/bits/user.h
+@@ -0,0 +1,43 @@
++struct user_regs_struct {
++ unsigned long pc;
++ unsigned long ra;
++ unsigned long sp;
++ unsigned long gp;
++ unsigned long tp;
++ unsigned long t0;
++ unsigned long t1;
++ unsigned long t2;
++ unsigned long s0;
++ unsigned long s1;
++ unsigned long a0;
++ unsigned long a1;
++ unsigned long a2;
++ unsigned long a3;
++ unsigned long a4;
++ unsigned long a5;
++ unsigned long a6;
++ unsigned long a7;
++ unsigned long s2;
++ unsigned long s3;
++ unsigned long s4;
++ unsigned long s5;
++ unsigned long s6;
++ unsigned long s7;
++ unsigned long s8;
++ unsigned long s9;
++ unsigned long s10;
++ unsigned long s11;
++ unsigned long t3;
++ unsigned long t4;
++ unsigned long t5;
++ unsigned long t6;
++};
++
++struct user_fpregs_struct {
++ double f[32];
++ unsigned int fcsr;
++};
++
++#define ELF_NGREG 32
++typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
++typedef struct user_fpregs_struct elf_fpregset_t;
+diff --git a/arch/riscv64/crt_arch.h b/arch/riscv64/crt_arch.h
+new file mode 100644
+index 00000000..d0e32a6c
+--- /dev/null
++++ b/arch/riscv64/crt_arch.h
+@@ -0,0 +1,18 @@
++__asm__(
++".text\n"
++".global " START "\n"
++".type " START ",%function\n"
++START ":\n"
++".weak __global_pointer$\n"
++".hidden __global_pointer$\n"
++".option push\n"
++".option norelax\n\t"
++"lla gp, __global_pointer$\n"
++".option pop\n\t"
++"mv a0, sp\n"
++".weak _DYNAMIC\n"
++".hidden _DYNAMIC\n\t"
++"lla a1, _DYNAMIC\n\t"
++"andi sp, sp, -16\n\t"
++"jal " START "_c"
++);
+diff --git a/arch/riscv64/pthread_arch.h b/arch/riscv64/pthread_arch.h
+new file mode 100644
+index 00000000..feffaa47
+--- /dev/null
++++ b/arch/riscv64/pthread_arch.h
+@@ -0,0 +1,12 @@
++static inline struct pthread *__pthread_self()
++{
++ char *tp;
++ __asm__ __volatile__("mv %0, tp" : "=r"(tp));
++ return (void *)(tp - sizeof(struct pthread));
++}
++
++#define TLS_ABOVE_TP
++#define GAP_ABOVE_TP 0
++#define TP_ADJ(p) ((char *)p + sizeof(struct pthread))
++
++#define MC_PC gregs[0]
+diff --git a/arch/riscv64/reloc.h b/arch/riscv64/reloc.h
+new file mode 100644
+index 00000000..8bd90dda
+--- /dev/null
++++ b/arch/riscv64/reloc.h
+@@ -0,0 +1,27 @@
++#if defined __riscv_float_abi_soft
++#define RISCV_FP_SUFFIX "-sf"
++#elif defined __riscv_float_abi_single
++#define RISCV_FP_SUFFIX "-sp"
++#elif defined __riscv_float_abi_double
++#define RISCV_FP_SUFFIX ""
++#endif
++
++#define RISCV_LDSO_HELPER(x) "riscv" #x
++#define RISCV_LDSO(x) RISCV_LDSO_HELPER(x)
++
++#define LDSO_ARCH RISCV_LDSO(__riscv_xlen) RISCV_FP_SUFFIX
++
++#define NO_LEGACY_INITFINI
++
++#define TPOFF_K 0
++
++#define REL_SYMBOLIC R_RISCV_64
++#define REL_PLT R_RISCV_JUMP_SLOT
++#define REL_RELATIVE R_RISCV_RELATIVE
++#define REL_COPY R_RISCV_COPY
++#define REL_DTPMOD R_RISCV_TLS_DTPMOD64
++#define REL_DTPOFF R_RISCV_TLS_DTPREL64
++#define REL_TPOFF R_RISCV_TLS_TPREL64
++
++#define CRTJMP(pc,sp) __asm__ __volatile__( \
++ "mv sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
+diff --git a/arch/riscv64/syscall_arch.h b/arch/riscv64/syscall_arch.h
+new file mode 100644
+index 00000000..7b6e3fd5
+--- /dev/null
++++ b/arch/riscv64/syscall_arch.h
+@@ -0,0 +1,76 @@
++#define __SYSCALL_LL_E(x) (x)
++#define __SYSCALL_LL_O(x) (x)
++
++#define __asm_syscall(...) \
++ __asm__ __volatile__ ("scall\n\t" \
++ : "+r"(a0) : __VA_ARGS__ : "memory"); \
++ return a0; \
++
++static inline long __syscall0(long n)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0");
++ __asm_syscall("r"(a7))
++}
++
++static inline long __syscall1(long n, long a)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ __asm_syscall("r"(a7), "0"(a0))
++}
++
++static inline long __syscall2(long n, long a, long b)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1))
++}
++
++static inline long __syscall3(long n, long a, long b, long c)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2))
++}
++
++static inline long __syscall4(long n, long a, long b, long c, long d)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3))
++}
++
++static inline long __syscall5(long n, long a, long b, long c, long d, long e)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ register long a4 __asm__("a4") = e;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4))
++}
++
++static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
++{
++ register long a7 __asm__("a7") = n;
++ register long a0 __asm__("a0") = a;
++ register long a1 __asm__("a1") = b;
++ register long a2 __asm__("a2") = c;
++ register long a3 __asm__("a3") = d;
++ register long a4 __asm__("a4") = e;
++ register long a5 __asm__("a5") = f;
++ __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5))
++}
++
++#define VDSO_USEFUL
++/* We don't have a clock_gettime function.
++#define VDSO_CGT_SYM "__vdso_clock_gettime"
++#define VDSO_CGT_VER "LINUX_2.6" */
+diff --git a/configure b/configure
+index 997e6652..4d3d8b44 100755
+--- a/configure
++++ b/configure
+@@ -322,6 +322,8 @@ microblaze*) ARCH=microblaze ;;
+ or1k*) ARCH=or1k ;;
+ powerpc64*) ARCH=powerpc64 ;;
+ powerpc*) ARCH=powerpc ;;
++riscv64*) ARCH=riscv64 ;;
++riscv*) ARCH=riscv32 ;;
+ sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
+ s390x*) ARCH=s390x ;;
+ unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
+@@ -640,6 +642,11 @@ trycppif __LITTLE_ENDIAN__ "$t" && SUBARCH=${SUBARCH}le
+ trycppif _SOFT_FLOAT "$t" && fail "$0: error: soft-float not supported on powerpc64"
+ fi
+
++if test "$ARCH" = "riscv" || test "$ARCH" = "riscv64" ; then
++trycppif "RISCVEB || _RISCVEB || __RISCVEB || __RISCVEB__" "$t" && SUBARCH=${SUBARCH}eb
++trycppif __riscv_soft_float "$t" && SUBARCH=${SUBARCH}-sf
++fi
++
+ if test "$ARCH" = "sh" ; then
+ tryflag CFLAGS_AUTO -Wa,--isa=any
+ trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
+diff --git a/crt/riscv32/crti.s b/crt/riscv32/crti.s
+new file mode 100644
+index 00000000..6916bfd6
+--- /dev/null
++++ b/crt/riscv32/crti.s
+@@ -0,0 +1,11 @@
++.section .init
++.global _init
++.type _init,%function
++_init:
++ ret
++
++.section .fini
++.global _fini
++.type _fini,%function
++_fini:
++ ret
+diff --git a/crt/riscv32/crtn.s b/crt/riscv32/crtn.s
+new file mode 100644
+index 00000000..e69de29b
+diff --git a/crt/riscv64/crti.s b/crt/riscv64/crti.s
+new file mode 100644
+index 00000000..8b54a65d
+--- /dev/null
++++ b/crt/riscv64/crti.s
+@@ -0,0 +1,11 @@
++.section .init
++.global _init
++.type _init,%function
++_init:
++ ret
++
++.section .fini
++.global _fini
++.type _fini %function
++_fini:
++ ret
+diff --git a/crt/riscv64/crtn.s b/crt/riscv64/crtn.s
+new file mode 100644
+index 00000000..e69de29b
+diff --git a/include/elf.h b/include/elf.h
+index c2297353..ec2e8fd0 100644
+--- a/include/elf.h
++++ b/include/elf.h
+@@ -3164,6 +3164,62 @@ enum
+ #define R_BPF_NONE 0
+ #define R_BPF_MAP_FD 1
+
++#define R_RISCV_NONE 0
++#define R_RISCV_32 1
++#define R_RISCV_64 2
++#define R_RISCV_RELATIVE 3
++#define R_RISCV_COPY 4
++#define R_RISCV_JUMP_SLOT 5
++#define R_RISCV_TLS_DTPMOD32 6
++#define R_RISCV_TLS_DTPMOD64 7
++#define R_RISCV_TLS_DTPREL32 8
++#define R_RISCV_TLS_DTPREL64 9
++#define R_RISCV_TLS_TPREL32 10
++#define R_RISCV_TLS_TPREL64 11
++
++#define R_RISCV_BRANCH 16
++#define R_RISCV_JAL 17
++#define R_RISCV_CALL 18
++#define R_RISCV_CALL_PLT 19
++#define R_RISCV_GOT_HI20 20
++#define R_RISCV_TLS_GOT_HI20 21
++#define R_RISCV_TLS_GD_HI20 22
++#define R_RISCV_PCREL_HI20 23
++#define R_RISCV_PCREL_LO12_I 24
++#define R_RISCV_PCREL_LO12_S 25
++#define R_RISCV_HI20 26
++#define R_RISCV_LO12_I 27
++#define R_RISCV_LO12_S 28
++#define R_RISCV_TPREL_HI20 29
++#define R_RISCV_TPREL_LO12_I 30
++#define R_RISCV_TPREL_LO12_S 31
++#define R_RISCV_TPREL_ADD 32
++#define R_RISCV_ADD8 33
++#define R_RISCV_ADD16 34
++#define R_RISCV_ADD32 35
++#define R_RISCV_ADD64 36
++#define R_RISCV_SUB8 37
++#define R_RISCV_SUB16 38
++#define R_RISCV_SUB32 39
++#define R_RISCV_SUB64 40
++#define R_RISCV_GNU_VTINHERIT 41
++#define R_RISCV_GNU_VTENTRY 42
++#define R_RISCV_ALIGN 43
++#define R_RISCV_RVC_BRANCH 44
++#define R_RISCV_RVC_JUMP 45
++#define R_RISCV_RVC_LUI 46
++#define R_RISCV_GPREL_I 47
++#define R_RISCV_GPREL_S 48
++#define R_RISCV_TPREL_I 49
++#define R_RISCV_TPREL_S 50
++#define R_RISCV_RELAX 51
++#define R_RISCV_SUB6 52
++#define R_RISCV_SET6 53
++#define R_RISCV_SET8 54
++#define R_RISCV_SET16 55
++#define R_RISCV_SET32 56
++#define R_RISCV_32_PCREL 57
++
+ #ifdef __cplusplus
+ }
+ #endif
+diff --git a/src/fenv/riscv32/fenv-sf.c b/src/fenv/riscv32/fenv-sf.c
+new file mode 100644
+index 00000000..9ff7b792
+--- /dev/null
++++ b/src/fenv/riscv32/fenv-sf.c
+@@ -0,0 +1,3 @@
++#ifdef __riscv_soft_float
++#include "../fenv.c"
++#endif
+diff --git a/src/fenv/riscv32/fenv.S b/src/fenv/riscv32/fenv.S
+new file mode 100644
+index 00000000..a55aa4ab
+--- /dev/null
++++ b/src/fenv/riscv32/fenv.S
+@@ -0,0 +1,53 @@
++#ifndef __riscv_soft_float
++
++.global feclearexcept
++.type feclearexcept, %function
++feclearexcept:
++ csrc fflags, a0
++ li a0, 0
++ ret
++
++.global feraiseexcept
++.type feraiseexcept, %function
++feraiseexcept:
++ csrs fflags, a0
++ li a0, 0
++ ret
++
++.global fetestexcept
++.type fetestexcept, %function
++fetestexcept:
++ frflags t0
++ and a0, t0, a0
++ ret
++
++.global fegetround
++.type fegetround, %function
++fegetround:
++ frrm a0
++ ret
++
++.global __fesetround
++.type __fesetround, %function
++__fesetround:
++ fsrm t0, a0
++ li a0, 0
++ ret
++
++.global fegetenv
++.type fegetenv, %function
++fegetenv:
++ frcsr t0
++ sw t0, 0(a0)
++ li a0, 0
++ ret
++
++.global fesetenv
++.type fesetenv, %function
++fesetenv:
++ lw t1, 0(a0)
++ fscsr t0, t1
++ li a0, 0
++ ret
++
++#endif
+diff --git a/src/fenv/riscv64/fenv-sf.c b/src/fenv/riscv64/fenv-sf.c
+new file mode 100644
+index 00000000..9ff7b792
+--- /dev/null
++++ b/src/fenv/riscv64/fenv-sf.c
+@@ -0,0 +1,3 @@
++#ifdef __riscv_soft_float
++#include "../fenv.c"
++#endif
+diff --git a/src/fenv/riscv64/fenv.S b/src/fenv/riscv64/fenv.S
+new file mode 100644
+index 00000000..a55aa4ab
+--- /dev/null
++++ b/src/fenv/riscv64/fenv.S
+@@ -0,0 +1,53 @@
++#ifndef __riscv_soft_float
++
++.global feclearexcept
++.type feclearexcept, %function
++feclearexcept:
++ csrc fflags, a0
++ li a0, 0
++ ret
++
++.global feraiseexcept
++.type feraiseexcept, %function
++feraiseexcept:
++ csrs fflags, a0
++ li a0, 0
++ ret
++
++.global fetestexcept
++.type fetestexcept, %function
++fetestexcept:
++ frflags t0
++ and a0, t0, a0
++ ret
++
++.global fegetround
++.type fegetround, %function
++fegetround:
++ frrm a0
++ ret
++
++.global __fesetround
++.type __fesetround, %function
++__fesetround:
++ fsrm t0, a0
++ li a0, 0
++ ret
++
++.global fegetenv
++.type fegetenv, %function
++fegetenv:
++ frcsr t0
++ sw t0, 0(a0)
++ li a0, 0
++ ret
++
++.global fesetenv
++.type fesetenv, %function
++fesetenv:
++ lw t1, 0(a0)
++ fscsr t0, t1
++ li a0, 0
++ ret
++
++#endif
+diff --git a/src/internal/riscv32/syscall.s b/src/internal/riscv32/syscall.s
+new file mode 100644
+index 00000000..a7d125af
+--- /dev/null
++++ b/src/internal/riscv32/syscall.s
+@@ -0,0 +1,15 @@
++.global __syscall
++.hidden __syscall
++.type __syscall,%function
++__syscall:
++ mv t0, a0
++ mv a0, a1
++ mv a1, a2
++ mv a2, a3
++ mv a3, a4
++ mv a4, a5
++ mv a5, a6
++ mv a6, a7
++ mv a7, t0
++ scall
++ ret
+diff --git a/src/internal/riscv64/syscall.s b/src/internal/riscv64/syscall.s
+new file mode 100644
+index 00000000..a7d125af
+--- /dev/null
++++ b/src/internal/riscv64/syscall.s
+@@ -0,0 +1,15 @@
++.global __syscall
++.hidden __syscall
++.type __syscall,%function
++__syscall:
++ mv t0, a0
++ mv a0, a1
++ mv a1, a2
++ mv a2, a3
++ mv a3, a4
++ mv a4, a5
++ mv a5, a6
++ mv a6, a7
++ mv a7, t0
++ scall
++ ret
+diff --git a/src/ldso/riscv32/dlsym.s b/src/ldso/riscv32/dlsym.s
+new file mode 100644
+index 00000000..ff9109dc
+--- /dev/null
++++ b/src/ldso/riscv32/dlsym.s
+@@ -0,0 +1,6 @@
++.global dlsym
++.hidden __dlsym
++.type dlsym, %function
++dlsym:
++ mv a2, ra
++ j __dlsym
+diff --git a/src/ldso/riscv64/dlsym.s b/src/ldso/riscv64/dlsym.s
+new file mode 100644
+index 00000000..ff9109dc
+--- /dev/null
++++ b/src/ldso/riscv64/dlsym.s
+@@ -0,0 +1,6 @@
++.global dlsym
++.hidden __dlsym
++.type dlsym, %function
++dlsym:
++ mv a2, ra
++ j __dlsym
+diff --git a/src/math/riscv32/copysign.s b/src/math/riscv32/copysign.s
+new file mode 100644
+index 00000000..81afa8b2
+--- /dev/null
++++ b/src/math/riscv32/copysign.s
+@@ -0,0 +1,5 @@
++.global copysign
++.type copysign, %function
++copysign:
++ fsgnj.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/copysignf.s b/src/math/riscv32/copysignf.s
+new file mode 100644
+index 00000000..fe36f909
+--- /dev/null
++++ b/src/math/riscv32/copysignf.s
+@@ -0,0 +1,5 @@
++.global copysignf
++.type copysignf, %function
++copysignf:
++ fsgnj.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/fabs.s b/src/math/riscv32/fabs.s
+new file mode 100644
+index 00000000..27def33c
+--- /dev/null
++++ b/src/math/riscv32/fabs.s
+@@ -0,0 +1,5 @@
++.global fabs
++.type fabs, %function
++fabs:
++ fabs.d fa0, fa0
++ ret
+diff --git a/src/math/riscv32/fabsf.s b/src/math/riscv32/fabsf.s
+new file mode 100644
+index 00000000..8e0b9d64
+--- /dev/null
++++ b/src/math/riscv32/fabsf.s
+@@ -0,0 +1,5 @@
++.global fabsf
++.type fabsf, %function
++fabsf:
++ fabs.s fa0, fa0
++ ret
+diff --git a/src/math/riscv32/fma.s b/src/math/riscv32/fma.s
+new file mode 100644
+index 00000000..17e1d136
+--- /dev/null
++++ b/src/math/riscv32/fma.s
+@@ -0,0 +1,5 @@
++.global fma
++.type fma, %function
++fma:
++ fmadd.d fa0, fa0, fa1, fa2
++ ret
+diff --git a/src/math/riscv32/fmaf.s b/src/math/riscv32/fmaf.s
+new file mode 100644
+index 00000000..cfe17100
+--- /dev/null
++++ b/src/math/riscv32/fmaf.s
+@@ -0,0 +1,5 @@
++.global fmaf
++.type fmaf, %function
++fmaf:
++ fmadd.s fa0, fa0, fa1, fa2
++ ret
+diff --git a/src/math/riscv32/fmax.s b/src/math/riscv32/fmax.s
+new file mode 100644
+index 00000000..40655d37
+--- /dev/null
++++ b/src/math/riscv32/fmax.s
+@@ -0,0 +1,5 @@
++.global fmax
++.type fmax, %function
++fmax:
++ fmax.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/fmaxf.s b/src/math/riscv32/fmaxf.s
+new file mode 100644
+index 00000000..490b6e91
+--- /dev/null
++++ b/src/math/riscv32/fmaxf.s
+@@ -0,0 +1,5 @@
++.global fmaxf
++.type fmaxf, %function
++fmaxf:
++ fmax.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/fmin.s b/src/math/riscv32/fmin.s
+new file mode 100644
+index 00000000..97f72e08
+--- /dev/null
++++ b/src/math/riscv32/fmin.s
+@@ -0,0 +1,5 @@
++.global fmin
++.type fmin, %function
++fmin:
++ fmin.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/fminf.s b/src/math/riscv32/fminf.s
+new file mode 100644
+index 00000000..4f8e55ee
+--- /dev/null
++++ b/src/math/riscv32/fminf.s
+@@ -0,0 +1,5 @@
++.global fminf
++.type fminf, %function
++fminf:
++ fmin.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv32/sqrt.s b/src/math/riscv32/sqrt.s
+new file mode 100644
+index 00000000..a4c8b3ea
+--- /dev/null
++++ b/src/math/riscv32/sqrt.s
+@@ -0,0 +1,5 @@
++.global sqrt
++.type sqrt, %function
++sqrt:
++ fsqrt.d fa0, fa0
++ ret
+diff --git a/src/math/riscv32/sqrtf.s b/src/math/riscv32/sqrtf.s
+new file mode 100644
+index 00000000..ff7abcf3
+--- /dev/null
++++ b/src/math/riscv32/sqrtf.s
+@@ -0,0 +1,5 @@
++.global sqrtf
++.type sqrtf, %function
++sqrtf:
++ fsqrt.s fa0, fa0
++ ret
+diff --git a/src/math/riscv64/copysign.s b/src/math/riscv64/copysign.s
+new file mode 100644
+index 00000000..81afa8b2
+--- /dev/null
++++ b/src/math/riscv64/copysign.s
+@@ -0,0 +1,5 @@
++.global copysign
++.type copysign, %function
++copysign:
++ fsgnj.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/copysignf.s b/src/math/riscv64/copysignf.s
+new file mode 100644
+index 00000000..fe36f909
+--- /dev/null
++++ b/src/math/riscv64/copysignf.s
+@@ -0,0 +1,5 @@
++.global copysignf
++.type copysignf, %function
++copysignf:
++ fsgnj.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/fabs.s b/src/math/riscv64/fabs.s
+new file mode 100644
+index 00000000..27def33c
+--- /dev/null
++++ b/src/math/riscv64/fabs.s
+@@ -0,0 +1,5 @@
++.global fabs
++.type fabs, %function
++fabs:
++ fabs.d fa0, fa0
++ ret
+diff --git a/src/math/riscv64/fabsf.s b/src/math/riscv64/fabsf.s
+new file mode 100644
+index 00000000..8e0b9d64
+--- /dev/null
++++ b/src/math/riscv64/fabsf.s
+@@ -0,0 +1,5 @@
++.global fabsf
++.type fabsf, %function
++fabsf:
++ fabs.s fa0, fa0
++ ret
+diff --git a/src/math/riscv64/fma.s b/src/math/riscv64/fma.s
+new file mode 100644
+index 00000000..17e1d136
+--- /dev/null
++++ b/src/math/riscv64/fma.s
+@@ -0,0 +1,5 @@
++.global fma
++.type fma, %function
++fma:
++ fmadd.d fa0, fa0, fa1, fa2
++ ret
+diff --git a/src/math/riscv64/fmaf.s b/src/math/riscv64/fmaf.s
+new file mode 100644
+index 00000000..cfe17100
+--- /dev/null
++++ b/src/math/riscv64/fmaf.s
+@@ -0,0 +1,5 @@
++.global fmaf
++.type fmaf, %function
++fmaf:
++ fmadd.s fa0, fa0, fa1, fa2
++ ret
+diff --git a/src/math/riscv64/fmax.s b/src/math/riscv64/fmax.s
+new file mode 100644
+index 00000000..40655d37
+--- /dev/null
++++ b/src/math/riscv64/fmax.s
+@@ -0,0 +1,5 @@
++.global fmax
++.type fmax, %function
++fmax:
++ fmax.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/fmaxf.s b/src/math/riscv64/fmaxf.s
+new file mode 100644
+index 00000000..490b6e91
+--- /dev/null
++++ b/src/math/riscv64/fmaxf.s
+@@ -0,0 +1,5 @@
++.global fmaxf
++.type fmaxf, %function
++fmaxf:
++ fmax.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/fmin.s b/src/math/riscv64/fmin.s
+new file mode 100644
+index 00000000..97f72e08
+--- /dev/null
++++ b/src/math/riscv64/fmin.s
+@@ -0,0 +1,5 @@
++.global fmin
++.type fmin, %function
++fmin:
++ fmin.d fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/fminf.s b/src/math/riscv64/fminf.s
+new file mode 100644
+index 00000000..4f8e55ee
+--- /dev/null
++++ b/src/math/riscv64/fminf.s
+@@ -0,0 +1,5 @@
++.global fminf
++.type fminf, %function
++fminf:
++ fmin.s fa0, fa0, fa1
++ ret
+diff --git a/src/math/riscv64/sqrt.s b/src/math/riscv64/sqrt.s
+new file mode 100644
+index 00000000..a4c8b3ea
+--- /dev/null
++++ b/src/math/riscv64/sqrt.s
+@@ -0,0 +1,5 @@
++.global sqrt
++.type sqrt, %function
++sqrt:
++ fsqrt.d fa0, fa0
++ ret
+diff --git a/src/math/riscv64/sqrtf.s b/src/math/riscv64/sqrtf.s
+new file mode 100644
+index 00000000..ff7abcf3
+--- /dev/null
++++ b/src/math/riscv64/sqrtf.s
+@@ -0,0 +1,5 @@
++.global sqrtf
++.type sqrtf, %function
++sqrtf:
++ fsqrt.s fa0, fa0
++ ret
+diff --git a/src/setjmp/riscv32/longjmp.S b/src/setjmp/riscv32/longjmp.S
+new file mode 100644
+index 00000000..fbf2439a
+--- /dev/null
++++ b/src/setjmp/riscv32/longjmp.S
+@@ -0,0 +1,44 @@
++.global __longjmp
++.global _longjmp
++.global longjmp
++.type __longjmp, %function
++.type _longjmp, %function
++.type longjmp, %function
++__longjmp:
++_longjmp:
++longjmp:
++ lw s0, 0(a0)
++ lw s1, 4(a0)
++ lw s2, 8(a0)
++ lw s3, 12(a0)
++ lw s4, 16(a0)
++ lw s5, 20(a0)
++ lw s6, 24(a0)
++ lw s7, 28(a0)
++ lw s8, 32(a0)
++ lw s9, 36(a0)
++ lw s10, 40(a0)
++ lw s11, 44(a0)
++ lw sp, 48(a0)
++ lw ra, 52(a0)
++
++#ifndef __riscv_soft_float
++ fld fs0, 56(a0)
++ fld fs1, 64(a0)
++ fld fs2, 72(a0)
++ fld fs3, 80(a0)
++ fld fs3, 88(a0)
++ fld fs4, 96(a0)
++ fld fs5, 104(a0)
++ fld fs6, 112(a0)
++ fld fs7, 120(a0)
++ fld fs8, 128(a0)
++ fld fs9, 136(a0)
++ fld fs10, 144(a0)
++ fld fs11, 152(a0)
++#endif
++
++ mv a0, a1
++ bnez a1, 1f
++ li a0, 1
++1: ret
+diff --git a/src/setjmp/riscv32/setjmp.S b/src/setjmp/riscv32/setjmp.S
+new file mode 100644
+index 00000000..14d5414d
+--- /dev/null
++++ b/src/setjmp/riscv32/setjmp.S
+@@ -0,0 +1,42 @@
++.global __setjmp
++.global _setjmp
++.global setjmp
++.type __setjmp, %function
++.type _setjmp, %function
++.type setjmp, %function
++__setjmp:
++_setjmp:
++setjmp:
++ sw s0, 0(a0)
++ sw s1, 4(a0)
++ sw s2, 8(a0)
++ sw s3, 12(a0)
++ sw s4, 16(a0)
++ sw s5, 20(a0)
++ sw s6, 24(a0)
++ sw s7, 28(a0)
++ sw s8, 32(a0)
++ sw s9, 36(a0)
++ sw s10, 40(a0)
++ sw s11, 44(a0)
++ sw sp, 48(a0)
++ sw ra, 52(a0)
++
++#ifndef __riscv_soft_float
++ fsd fs0, 56(a0)
++ fsd fs1, 64(a0)
++ fsd fs2, 72(a0)
++ fsd fs3, 80(a0)
++ fsd fs3, 88(a0)
++ fsd fs4, 96(a0)
++ fsd fs5, 104(a0)
++ fsd fs6, 112(a0)
++ fsd fs7, 120(a0)
++ fsd fs8, 128(a0)
++ fsd fs9, 136(a0)
++ fsd fs10, 144(a0)
++ fsd fs11, 152(a0)
++#endif
++
++ li a0, 0
++ ret
+diff --git a/src/setjmp/riscv64/longjmp.S b/src/setjmp/riscv64/longjmp.S
+new file mode 100644
+index 00000000..d87a1afe
+--- /dev/null
++++ b/src/setjmp/riscv64/longjmp.S
+@@ -0,0 +1,44 @@
++.global __longjmp
++.global _longjmp
++.global longjmp
++.type __longjmp, %function
++.type _longjmp, %function
++.type longjmp, %function
++__longjmp:
++_longjmp:
++longjmp:
++ ld s0, 0(a0)
++ ld s1, 8(a0)
++ ld s2, 16(a0)
++ ld s3, 24(a0)
++ ld s4, 32(a0)
++ ld s5, 40(a0)
++ ld s6, 48(a0)
++ ld s7, 56(a0)
++ ld s8, 64(a0)
++ ld s9, 72(a0)
++ ld s10, 80(a0)
++ ld s11, 88(a0)
++ ld sp, 96(a0)
++ ld ra, 104(a0)
++
++#ifndef __riscv_soft_float
++ fld fs0, 112(a0)
++ fld fs1, 120(a0)
++ fld fs2, 128(a0)
++ fld fs3, 136(a0)
++ fld fs3, 144(a0)
++ fld fs4, 152(a0)
++ fld fs5, 160(a0)
++ fld fs6, 168(a0)
++ fld fs7, 176(a0)
++ fld fs8, 184(a0)
++ fld fs9, 192(a0)
++ fld fs10, 200(a0)
++ fld fs11, 208(a0)
++#endif
++
++ mv a0, a1
++ bnez a1, 1f
++ li a0, 1
++1: ret
+diff --git a/src/setjmp/riscv64/setjmp.S b/src/setjmp/riscv64/setjmp.S
+new file mode 100644
+index 00000000..abc05aa5
+--- /dev/null
++++ b/src/setjmp/riscv64/setjmp.S
+@@ -0,0 +1,42 @@
++.global __setjmp
++.global _setjmp
++.global setjmp
++.type __setjmp, %function
++.type _setjmp, %function
++.type setjmp, %function
++__setjmp:
++_setjmp:
++setjmp:
++ sd s0, 0(a0)
++ sd s1, 8(a0)
++ sd s2, 16(a0)
++ sd s3, 24(a0)
++ sd s4, 32(a0)
++ sd s5, 40(a0)
++ sd s6, 48(a0)
++ sd s7, 56(a0)
++ sd s8, 64(a0)
++ sd s9, 72(a0)
++ sd s10, 80(a0)
++ sd s11, 88(a0)
++ sd sp, 96(a0)
++ sd ra, 104(a0)
++
++#ifndef __riscv_soft_float
++ fsd fs0, 112(a0)
++ fsd fs1, 120(a0)
++ fsd fs2, 128(a0)
++ fsd fs3, 136(a0)
++ fsd fs3, 144(a0)
++ fsd fs4, 152(a0)
++ fsd fs5, 160(a0)
++ fsd fs6, 168(a0)
++ fsd fs7, 176(a0)
++ fsd fs8, 184(a0)
++ fsd fs9, 192(a0)
++ fsd fs10, 200(a0)
++ fsd fs11, 208(a0)
++#endif
++
++ li a0, 0
++ ret
+diff --git a/src/signal/riscv32/restore.s b/src/signal/riscv32/restore.s
+new file mode 100644
+index 00000000..732736d1
+--- /dev/null
++++ b/src/signal/riscv32/restore.s
+@@ -0,0 +1,8 @@
++.global __restore
++.type __restore, %function
++__restore:
++.global __restore_rt
++.type __restore_rt, %function
++__restore_rt:
++ li a7, 139 # SYS_rt_sigreturn
++ scall
+diff --git a/src/signal/riscv32/sigsetjmp.s b/src/signal/riscv32/sigsetjmp.s
+new file mode 100644
+index 00000000..7e4cb1f4
+--- /dev/null
++++ b/src/signal/riscv32/sigsetjmp.s
+@@ -0,0 +1,21 @@
++.global sigsetjmp
++.global __sigsetjmp
++.type sigsetjmp, %function
++.type __sigsetjmp, %function
++sigsetjmp:
++__sigsetjmp:
++ beqz a1, setjmp
++
++ sw ra, 160(a0)
++ sw s0, 164(a0)
++ mv s0, a0
++
++ jal setjmp
++
++ mv a1, a0
++ mv a0, s0
++ lw s0, 164(a0)
++ lw ra, 160(a0)
++
++.hidden __sigsetjmp_tail
++ j __sigsetjmp_tail
+diff --git a/src/signal/riscv64/restore.s b/src/signal/riscv64/restore.s
+new file mode 100644
+index 00000000..732736d1
+--- /dev/null
++++ b/src/signal/riscv64/restore.s
+@@ -0,0 +1,8 @@
++.global __restore
++.type __restore, %function
++__restore:
++.global __restore_rt
++.type __restore_rt, %function
++__restore_rt:
++ li a7, 139 # SYS_rt_sigreturn
++ scall
+diff --git a/src/signal/riscv64/sigsetjmp.s b/src/signal/riscv64/sigsetjmp.s
+new file mode 100644
+index 00000000..9ed9500b
+--- /dev/null
++++ b/src/signal/riscv64/sigsetjmp.s
+@@ -0,0 +1,21 @@
++.global sigsetjmp
++.global __sigsetjmp
++.type sigsetjmp, %function
++.type __sigsetjmp, %function
++sigsetjmp:
++__sigsetjmp:
++ beqz a1, setjmp
++
++ sd ra, 216(a0)
++ sd s0, 224(a0)
++ mv s0, a0
++
++ jal setjmp
++
++ mv a1, a0
++ mv a0, s0
++ ld s0, 224(a0)
++ ld ra, 216(a0)
++
++.hidden __sigsetjmp_tail
++ j __sigsetjmp_tail
+diff --git a/src/thread/riscv32/__set_thread_area.s b/src/thread/riscv32/__set_thread_area.s
+new file mode 100644
+index 00000000..828154d2
+--- /dev/null
++++ b/src/thread/riscv32/__set_thread_area.s
+@@ -0,0 +1,6 @@
++.global __set_thread_area
++.type __set_thread_area, %function
++__set_thread_area:
++ mv tp, a0
++ li a0, 0
++ ret
+diff --git a/src/thread/riscv32/__unmapself.s b/src/thread/riscv32/__unmapself.s
+new file mode 100644
+index 00000000..98e7881f
+--- /dev/null
++++ b/src/thread/riscv32/__unmapself.s
+@@ -0,0 +1,7 @@
++.global __unmapself
++.type __unmapself, %function
++__unmapself:
++ li a7, 215 # SYS_munmap
++ scall
++ li a7, 93 # SYS_exit
++ scall
+diff --git a/src/thread/riscv32/clone.s b/src/thread/riscv32/clone.s
+new file mode 100644
+index 00000000..30126d2c
+--- /dev/null
++++ b/src/thread/riscv32/clone.s
+@@ -0,0 +1,34 @@
++# __clone(func, stack, flags, arg, ptid, tls, ctid)
++# a0, a1, a2, a3, a4, a5, a6
++
++# syscall(SYS_clone, flags, stack, ptid, tls, ctid)
++# a7 a0, a1, a2, a3, a4
++
++.global __clone
++.type __clone, %function
++__clone:
++ # Save func and arg to stack
++ addi a1, a1, -16
++ sw a0, 0(a1)
++ sw a3, 4(a1)
++
++ # Call SYS_clone
++ mv a0, a2
++ mv a2, a4
++ mv a3, a5
++ mv a4, a6
++ li a7, 220 # SYS_clone
++ scall
++
++ beqz a0, 1f
++ # Parent
++ ret
++
++ # Child
++1: lw a1, 0(sp)
++ lw a0, 4(sp)
++ jalr a1
++
++ # Exit
++ li a7, 93 # SYS_exit
++ scall
+diff --git a/src/thread/riscv32/syscall_cp.s b/src/thread/riscv32/syscall_cp.s
+new file mode 100644
+index 00000000..71bf6d3e
+--- /dev/null
++++ b/src/thread/riscv32/syscall_cp.s
+@@ -0,0 +1,29 @@
++.global __cp_begin
++.hidden __cp_begin
++.global __cp_end
++.hidden __cp_end
++.global __cp_cancel
++.hidden __cp_cancel
++.hidden __cancel
++.global __syscall_cp_asm
++.hidden __syscall_cp_asm
++.type __syscall_cp_asm, %function
++__syscall_cp_asm:
++__cp_begin:
++ lw t0, 0(a0)
++ bnez t0, __cp_cancel
++
++ mv t0, a1
++ mv a0, a2
++ mv a1, a3
++ mv a2, a4
++ mv a3, a5
++ mv a4, a6
++ mv a5, a7
++ lw a6, 0(sp)
++ mv a7, t0
++ scall
++__cp_cancel:
++ ret
++__cp_end:
++ j __cancel
+diff --git a/src/thread/riscv64/__set_thread_area.s b/src/thread/riscv64/__set_thread_area.s
+new file mode 100644
+index 00000000..828154d2
+--- /dev/null
++++ b/src/thread/riscv64/__set_thread_area.s
+@@ -0,0 +1,6 @@
++.global __set_thread_area
++.type __set_thread_area, %function
++__set_thread_area:
++ mv tp, a0
++ li a0, 0
++ ret
+diff --git a/src/thread/riscv64/__unmapself.s b/src/thread/riscv64/__unmapself.s
+new file mode 100644
+index 00000000..98e7881f
+--- /dev/null
++++ b/src/thread/riscv64/__unmapself.s
+@@ -0,0 +1,7 @@
++.global __unmapself
++.type __unmapself, %function
++__unmapself:
++ li a7, 215 # SYS_munmap
++ scall
++ li a7, 93 # SYS_exit
++ scall
+diff --git a/src/thread/riscv64/clone.s b/src/thread/riscv64/clone.s
+new file mode 100644
+index 00000000..b2d4f02d
+--- /dev/null
++++ b/src/thread/riscv64/clone.s
+@@ -0,0 +1,34 @@
++# __clone(func, stack, flags, arg, ptid, tls, ctid)
++# a0, a1, a2, a3, a4, a5, a6
++
++# syscall(SYS_clone, flags, stack, ptid, tls, ctid)
++# a7 a0, a1, a2, a3, a4
++
++.global __clone
++.type __clone, %function
++__clone:
++ # Save func and arg to stack
++ addi a1, a1, -16
++ sd a0, 0(a1)
++ sd a3, 8(a1)
++
++ # Call SYS_clone
++ mv a0, a2
++ mv a2, a4
++ mv a3, a5
++ mv a4, a6
++ li a7, 220 # SYS_clone
++ scall
++
++ beqz a0, 1f
++ # Parent
++ ret
++
++ # Child
++1: ld a1, 0(sp)
++ ld a0, 8(sp)
++ jalr a1
++
++ # Exit
++ li a7, 93 # SYS_exit
++ scall
+diff --git a/src/thread/riscv64/syscall_cp.s b/src/thread/riscv64/syscall_cp.s
+new file mode 100644
+index 00000000..c745b328
+--- /dev/null
++++ b/src/thread/riscv64/syscall_cp.s
+@@ -0,0 +1,29 @@
++.global __cp_begin
++.hidden __cp_begin
++.global __cp_end
++.hidden __cp_end
++.global __cp_cancel
++.hidden __cp_cancel
++.hidden __cancel
++.global __syscall_cp_asm
++.hidden __syscall_cp_asm
++.type __syscall_cp_asm, %function
++__syscall_cp_asm:
++__cp_begin:
++ ld t0, 0(a0)
++ bnez t0, __cp_cancel
++
++ mv t0, a1
++ mv a0, a2
++ mv a1, a3
++ mv a2, a4
++ mv a3, a5
++ mv a4, a6
++ mv a5, a7
++ ld a6, 0(sp)
++ mv a7, t0
++ scall
++__cp_cancel:
++ ret
++__cp_end:
++ j __cancel
projects / openwrt / staging / wigyori.git / commitdiff