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Date: Fri, 24 May 2019 10:46:08 -0400
From: Drew DeVault <sir@...wn.com>
To: musl@...ts.openwall.com
Cc: Drew DeVault <sir@...wn.com>,
Alex Suykov <alex.suykov@...il.com>,
Aric Belsito <lluixhi@...il.com>,
Michael Clark <mjc@...ive.com>,
Michael Forney <mforney@...rney.org>,
Stefan O'Rear <sorear2@...il.com>
Subject: [PATCH] RISC-V: add riscv64 architecture support
Author: Alex Suykov <alex.suykov@...il.com>
Author: Aric Belsito <lluixhi@...il.com>
Author: Drew DeVault <sir@...wn.com>
Author: Michael Clark <mjc@...ive.com>
Author: Michael Forney <mforney@...rney.org>
Author: Stefan O'Rear <sorear2@...il.com>
---
This is the latest version of our work on porting musl to riscv64. We've
removed riscv32 from this port for the time being, as the 32-bit ABI has
not stabilized yet. I've ported Alpine Linux to riscv64 based on this
work and have been using it for several months without issue.
Stefan had a concern with barriers for setjmp, but I haven't encountered
any issues. Will let him to comment on this if the concern remains.
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 | 79 +++++++
configure | 6 +
crt/riscv64/crti.s | 11 +
crt/riscv64/crtn.s | 0
include/elf.h | 56 +++++
src/fenv/riscv64/fenv-sf.c | 3 +
src/fenv/riscv64/fenv.S | 53 +++++
src/internal/riscv64/syscall.s | 15 ++
src/ldso/riscv64/dlsym.s | 6 +
src/linux/cache.c | 37 ++++
src/math/riscv64/copysign.c | 15 ++
src/math/riscv64/copysignf.c | 15 ++
src/math/riscv64/fabs.c | 15 ++
src/math/riscv64/fabsf.c | 15 ++
src/math/riscv64/fma.c | 15 ++
src/math/riscv64/fmaf.c | 15 ++
src/math/riscv64/fmax.c | 15 ++
src/math/riscv64/fmaxf.c | 15 ++
src/math/riscv64/fmin.c | 15 ++
src/math/riscv64/fminf.c | 15 ++
src/math/riscv64/sqrt.c | 15 ++
src/math/riscv64/sqrtf.c | 15 ++
src/setjmp/riscv64/longjmp.S | 42 ++++
src/setjmp/riscv64/setjmp.S | 41 ++++
src/signal/riscv64/restore.s | 8 +
src/signal/riscv64/sigsetjmp.s | 23 ++
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 +++
54 files changed, 1450 insertions(+)
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/riscv64/crti.s
create mode 100644 crt/riscv64/crtn.s
create mode 100644 src/fenv/riscv64/fenv-sf.c
create mode 100644 src/fenv/riscv64/fenv.S
create mode 100644 src/internal/riscv64/syscall.s
create mode 100644 src/ldso/riscv64/dlsym.s
create mode 100644 src/math/riscv64/copysign.c
create mode 100644 src/math/riscv64/copysignf.c
create mode 100644 src/math/riscv64/fabs.c
create mode 100644 src/math/riscv64/fabsf.c
create mode 100644 src/math/riscv64/fma.c
create mode 100644 src/math/riscv64/fmaf.c
create mode 100644 src/math/riscv64/fmax.c
create mode 100644 src/math/riscv64/fmaxf.c
create mode 100644 src/math/riscv64/fmin.c
create mode 100644 src/math/riscv64/fminf.c
create mode 100644 src/math/riscv64/sqrt.c
create mode 100644 src/math/riscv64/sqrtf.c
create mode 100644 src/setjmp/riscv64/longjmp.S
create mode 100644 src/setjmp/riscv64/setjmp.S
create mode 100644 src/signal/riscv64/restore.s
create mode 100644 src/signal/riscv64/sigsetjmp.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/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..ecb4d18f
--- /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 0200000
+#define O_NOFOLLOW 0400000
+#define O_CLOEXEC 02000000
+
+#define O_ASYNC 020000
+#define O_DIRECT 040000
+#define O_LARGEFILE 0100000
+#define O_NOATIME 01000000
+#define O_PATH 010000000
+#define O_TMPFILE 020200000
+#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..ad7e4016
--- /dev/null
+++ b/arch/riscv64/bits/setjmp.h
@@ -0,0 +1 @@
+typedef unsigned long __jmp_buf[26];
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..2372ed37
--- /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_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
+#define __NR_riscv_flush_icache (__NR_sysriscv + 15)
+
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..a5b0f646
--- /dev/null
+++ b/arch/riscv64/syscall_arch.h
@@ -0,0 +1,79 @@
+#define __SYSCALL_LL_E(x) (x)
+#define __SYSCALL_LL_O(x) (x)
+
+#define __asm_syscall(...) \
+ __asm__ __volatile__ ("ecall\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" */
+
+#define VDSO_FLUSH_ICACHE_SYM "__vdso_flush_icache"
+#define VDSO_FLUSH_ICACHE_VER "LINUX_4.5"
diff --git a/configure b/configure
index 2123ddce..855eab58 100755
--- a/configure
+++ b/configure
@@ -322,6 +322,7 @@ microblaze*) ARCH=microblaze ;;
or1k*) ARCH=or1k ;;
powerpc64*|ppc64*) ARCH=powerpc64 ;;
powerpc*|ppc*) ARCH=powerpc ;;
+riscv64*) ARCH=riscv64 ;;
sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
s390x*) ARCH=s390x ;;
unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
@@ -654,6 +655,11 @@ trycppif __LITTLE_ENDIAN__ "$t" && SUBARCH=${SUBARCH}le
trycppif _SOFT_FLOAT "$t" && fail "$0: error: soft-float not supported on powerpc64"
fi
+if test "$ARCH" = "riscv64" ; then
+trycppif "RISCVEB || _RISCVEB || __RISCVEB || __RISCVEB__" "$t" && SUBARCH=${SUBARCH}eb
+trycppif __riscv_float_abi_soft "$t" && SUBARCH=${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/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 aad522e4..41e6e0c3 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -3226,6 +3226,62 @@ 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/riscv64/fenv-sf.c b/src/fenv/riscv64/fenv-sf.c
new file mode 100644
index 00000000..ecd3cb5c
--- /dev/null
+++ b/src/fenv/riscv64/fenv-sf.c
@@ -0,0 +1,3 @@
+#ifndef __riscv_flen
+#include "../fenv.c"
+#endif
diff --git a/src/fenv/riscv64/fenv.S b/src/fenv/riscv64/fenv.S
new file mode 100644
index 00000000..97f74dd6
--- /dev/null
+++ b/src/fenv/riscv64/fenv.S
@@ -0,0 +1,53 @@
+#ifdef __riscv_flen
+
+.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/riscv64/syscall.s b/src/internal/riscv64/syscall.s
new file mode 100644
index 00000000..27905f41
--- /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
+ ecall
+ ret
diff --git a/src/ldso/riscv64/dlsym.s b/src/ldso/riscv64/dlsym.s
new file mode 100644
index 00000000..322d55bc
--- /dev/null
+++ b/src/ldso/riscv64/dlsym.s
@@ -0,0 +1,6 @@
+.global dlsym
+.hidden __dlsym
+.type dlsym, %function
+dlsym:
+ mv a2, ra
+ tail __dlsym
diff --git a/src/linux/cache.c b/src/linux/cache.c
index 84a138a4..0c5af2ec 100644
--- a/src/linux/cache.c
+++ b/src/linux/cache.c
@@ -1,4 +1,6 @@
+#include <errno.h>
#include "syscall.h"
+#include "atomic.h"
#ifdef SYS_cacheflush
int _flush_cache(void *addr, int len, int op)
@@ -15,3 +17,38 @@ int __cachectl(void *addr, int len, int op)
}
weak_alias(__cachectl, cachectl);
#endif
+
+#ifdef SYS_riscv_flush_icache
+
+#ifdef VDSO_FLUSH_ICACHE_SYM
+
+static void *volatile vdso_func;
+
+static int flush_icache_init(void *start, void *end, unsigned long int flags)
+{
+ void *p = __vdsosym(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM);
+ int (*f)(void *, void *, unsigned long int) =
+ (int (*)(void *, void *, unsigned long int))p;
+ a_cas_p(&vdso_func, (void *)flush_icache_init, p);
+ return f ? f(start, end, flags) : -ENOSYS;
+}
+
+static void *volatile vdso_func = (void *)flush_icache_init;
+
+#endif
+
+int __riscv_flush_icache(void *start, void *end, unsigned long int flags)
+{
+#ifdef VDSO_FLUSH_ICACHE_SYM
+ int (*f)(void *, void *, unsigned long int) =
+ (int (*)(void *, void *, unsigned long int))vdso_func;
+ if (f) {
+ int r = f(start, end, flags);
+ if (!r) return r;
+ if (r != -ENOSYS) return __syscall_ret(r);
+ }
+#endif
+ return syscall(SYS_riscv_flush_icache, start, end, flags);
+}
+weak_alias(__riscv_flush_icache, riscv_flush_icache);
+#endif
diff --git a/src/math/riscv64/copysign.c b/src/math/riscv64/copysign.c
new file mode 100644
index 00000000..c7854178
--- /dev/null
+++ b/src/math/riscv64/copysign.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double copysign(double x, double y)
+{
+ __asm__ ("fsgnj.d %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../copysign.c"
+
+#endif
diff --git a/src/math/riscv64/copysignf.c b/src/math/riscv64/copysignf.c
new file mode 100644
index 00000000..a125611a
--- /dev/null
+++ b/src/math/riscv64/copysignf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float copysignf(float x, float y)
+{
+ __asm__ ("fsgnj.s %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../copysignf.c"
+
+#endif
diff --git a/src/math/riscv64/fabs.c b/src/math/riscv64/fabs.c
new file mode 100644
index 00000000..5290b6f0
--- /dev/null
+++ b/src/math/riscv64/fabs.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double fabs(double x)
+{
+ __asm__ ("fabs.d %0, %1" : "=f"(x) : "f"(x));
+ return x;
+}
+
+#else
+
+#include "../fabs.c"
+
+#endif
diff --git a/src/math/riscv64/fabsf.c b/src/math/riscv64/fabsf.c
new file mode 100644
index 00000000..f5032e35
--- /dev/null
+++ b/src/math/riscv64/fabsf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float fabsf(float x)
+{
+ __asm__ ("fabs.s %0, %1" : "=f"(x) : "f"(x));
+ return x;
+}
+
+#else
+
+#include "../fabsf.c"
+
+#endif
diff --git a/src/math/riscv64/fma.c b/src/math/riscv64/fma.c
new file mode 100644
index 00000000..99b05713
--- /dev/null
+++ b/src/math/riscv64/fma.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double fma(double x, double y, double z)
+{
+ __asm__ ("fmadd.d %0, %1, %2, %3" : "=f"(x) : "f"(x), "f"(y), "f"(z));
+ return x;
+}
+
+#else
+
+#include "../fma.c"
+
+#endif
diff --git a/src/math/riscv64/fmaf.c b/src/math/riscv64/fmaf.c
new file mode 100644
index 00000000..f9dc47ed
--- /dev/null
+++ b/src/math/riscv64/fmaf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float fmaf(float x, float y, float z)
+{
+ __asm__ ("fmadd.s %0, %1, %2, %3" : "=f"(x) : "f"(x), "f"(y), "f"(z));
+ return x;
+}
+
+#else
+
+#include "../fmaf.c"
+
+#endif
diff --git a/src/math/riscv64/fmax.c b/src/math/riscv64/fmax.c
new file mode 100644
index 00000000..023709cd
--- /dev/null
+++ b/src/math/riscv64/fmax.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double fmax(double x, double y)
+{
+ __asm__ ("fmax.d %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../fmax.c"
+
+#endif
diff --git a/src/math/riscv64/fmaxf.c b/src/math/riscv64/fmaxf.c
new file mode 100644
index 00000000..863d2bd1
--- /dev/null
+++ b/src/math/riscv64/fmaxf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float fmaxf(float x, float y)
+{
+ __asm__ ("fmax.s %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../fmaxf.c"
+
+#endif
diff --git a/src/math/riscv64/fmin.c b/src/math/riscv64/fmin.c
new file mode 100644
index 00000000..a4e3b067
--- /dev/null
+++ b/src/math/riscv64/fmin.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double fmin(double x, double y)
+{
+ __asm__ ("fmin.d %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../fmin.c"
+
+#endif
diff --git a/src/math/riscv64/fminf.c b/src/math/riscv64/fminf.c
new file mode 100644
index 00000000..32156e80
--- /dev/null
+++ b/src/math/riscv64/fminf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float fminf(float x, float y)
+{
+ __asm__ ("fmin.s %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
+ return x;
+}
+
+#else
+
+#include "../fminf.c"
+
+#endif
diff --git a/src/math/riscv64/sqrt.c b/src/math/riscv64/sqrt.c
new file mode 100644
index 00000000..867a504c
--- /dev/null
+++ b/src/math/riscv64/sqrt.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 64
+
+double sqrt(double x)
+{
+ __asm__ ("fsqrt.d %0, %1" : "=f"(x) : "f"(x));
+ return x;
+}
+
+#else
+
+#include "../sqrt.c"
+
+#endif
diff --git a/src/math/riscv64/sqrtf.c b/src/math/riscv64/sqrtf.c
new file mode 100644
index 00000000..610c2cf8
--- /dev/null
+++ b/src/math/riscv64/sqrtf.c
@@ -0,0 +1,15 @@
+#include <math.h>
+
+#if __riscv_flen >= 32
+
+float sqrtf(float x)
+{
+ __asm__ ("fsqrt.s %0, %1" : "=f"(x) : "f"(x));
+ return x;
+}
+
+#else
+
+#include "../sqrtf.c"
+
+#endif
diff --git a/src/setjmp/riscv64/longjmp.S b/src/setjmp/riscv64/longjmp.S
new file mode 100644
index 00000000..1092c5a9
--- /dev/null
+++ b/src/setjmp/riscv64/longjmp.S
@@ -0,0 +1,42 @@
+.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_float_abi_soft
+ fld fs0, 112(a0)
+ fld fs1, 120(a0)
+ fld fs2, 128(a0)
+ fld fs3, 136(a0)
+ fld fs4, 144(a0)
+ fld fs5, 152(a0)
+ fld fs6, 160(a0)
+ fld fs7, 168(a0)
+ fld fs8, 176(a0)
+ fld fs9, 184(a0)
+ fld fs10, 192(a0)
+ fld fs11, 200(a0)
+#endif
+
+ seqz a0, a1
+ add a0, a0, a1
+ ret
diff --git a/src/setjmp/riscv64/setjmp.S b/src/setjmp/riscv64/setjmp.S
new file mode 100644
index 00000000..04ba1817
--- /dev/null
+++ b/src/setjmp/riscv64/setjmp.S
@@ -0,0 +1,41 @@
+.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_float_abi_soft
+ fsd fs0, 112(a0)
+ fsd fs1, 120(a0)
+ fsd fs2, 128(a0)
+ fsd fs3, 136(a0)
+ fsd fs4, 144(a0)
+ fsd fs5, 152(a0)
+ fsd fs6, 160(a0)
+ fsd fs7, 168(a0)
+ fsd fs8, 176(a0)
+ fsd fs9, 184(a0)
+ fsd fs10, 192(a0)
+ fsd fs11, 200(a0)
+#endif
+
+ li a0, 0
+ ret
diff --git a/src/signal/riscv64/restore.s b/src/signal/riscv64/restore.s
new file mode 100644
index 00000000..40012c75
--- /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
+ ecall
diff --git a/src/signal/riscv64/sigsetjmp.s b/src/signal/riscv64/sigsetjmp.s
new file mode 100644
index 00000000..1acd4856
--- /dev/null
+++ b/src/signal/riscv64/sigsetjmp.s
@@ -0,0 +1,23 @@
+.global sigsetjmp
+.global __sigsetjmp
+.type sigsetjmp, %function
+.type __sigsetjmp, %function
+sigsetjmp:
+__sigsetjmp:
+ bnez a1, 1f
+ tail setjmp
+1:
+
+ sd ra, 208(a0)
+ sd s0, 224(a0)
+ mv s0, a0
+
+ call setjmp
+
+ mv a1, a0
+ mv a0, s0
+ ld s0, 224(a0)
+ ld ra, 208(a0)
+
+.hidden __sigsetjmp_tail
+ tail __sigsetjmp_tail
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..805d3a1d
--- /dev/null
+++ b/src/thread/riscv64/__unmapself.s
@@ -0,0 +1,7 @@
+.global __unmapself
+.type __unmapself, %function
+__unmapself:
+ li a7, 215 # SYS_munmap
+ ecall
+ li a7, 93 # SYS_exit
+ ecall
diff --git a/src/thread/riscv64/clone.s b/src/thread/riscv64/clone.s
new file mode 100644
index 00000000..52ee8cd0
--- /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
+ ecall
+
+ beqz a0, 1f
+ # Parent
+ ret
+
+ # Child
+1: ld a1, 0(sp)
+ ld a0, 8(sp)
+ jalr a1
+
+ # Exit
+ li a7, 93 # SYS_exit
+ ecall
diff --git a/src/thread/riscv64/syscall_cp.s b/src/thread/riscv64/syscall_cp.s
new file mode 100644
index 00000000..b54ea200
--- /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:
+ 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
+ ld a6, 0(sp)
+ mv a7, t0
+ ecall
+__cp_end:
+ ret
+__cp_cancel:
+ tail __cancel
--
2.21.0
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