runtime: add runtime support for openbsd/riscv64 port

4a6f656c · 4a6f656c · commit 57c1dfd2ab36 · 2023-10-04T02:55:17.000Z
Updates #55999 Change-Id: I0e80f80d49696a00d979f85230d482e24d4c2d7c Reviewed-on: https://go-review.googlesource.com/c/go/+/518626 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Joel Sing <joel@sing.id.au> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Michael Pratt <mpratt@google.com> Reviewed-by: Aaron Bieber <deftly@gmail.com>
diff --git a/src/runtime/asm_riscv64.s b/src/runtime/asm_riscv64.s
@@ -309,6 +309,15 @@ TEXT gosave_systemstack_switch<>(SB),NOSPLIT|NOFRAME,$0
 	CALL	runtime·abort(SB)
 	RET
 
+// func asmcgocall_no_g(fn, arg unsafe.Pointer)
+// Call fn(arg) aligned appropriately for the gcc ABI.
+// Called on a system stack, and there may be no g yet (during needm).
+TEXT ·asmcgocall_no_g(SB),NOSPLIT,$0-16
+	MOV	fn+0(FP), X5
+	MOV	arg+8(FP), X10
+	JALR	RA, (X5)
+	RET
+
 // func asmcgocall(fn, arg unsafe.Pointer) int32
 // Call fn(arg) on the scheduler stack,
 // aligned appropriately for the gcc ABI.
diff --git a/src/runtime/defs_openbsd_riscv64.go b/src/runtime/defs_openbsd_riscv64.go
@@ -0,0 +1,176 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import "unsafe"
+
+const (
+	_EINTR  = 0x4
+	_EFAULT = 0xe
+	_EAGAIN = 0x23
+
+	_O_WRONLY   = 0x1
+	_O_NONBLOCK = 0x4
+	_O_CREAT    = 0x200
+	_O_TRUNC    = 0x400
+	_O_CLOEXEC  = 0x10000
+
+	_PROT_NONE  = 0x0
+	_PROT_READ  = 0x1
+	_PROT_WRITE = 0x2
+	_PROT_EXEC  = 0x4
+
+	_MAP_ANON    = 0x1000
+	_MAP_PRIVATE = 0x2
+	_MAP_FIXED   = 0x10
+	_MAP_STACK   = 0x4000
+
+	_MADV_DONTNEED = 0x4
+	_MADV_FREE     = 0x6
+
+	_SA_SIGINFO = 0x40
+	_SA_RESTART = 0x2
+	_SA_ONSTACK = 0x1
+
+	_PTHREAD_CREATE_DETACHED = 0x1
+
+	_SIGHUP    = 0x1
+	_SIGINT    = 0x2
+	_SIGQUIT   = 0x3
+	_SIGILL    = 0x4
+	_SIGTRAP   = 0x5
+	_SIGABRT   = 0x6
+	_SIGEMT    = 0x7
+	_SIGFPE    = 0x8
+	_SIGKILL   = 0x9
+	_SIGBUS    = 0xa
+	_SIGSEGV   = 0xb
+	_SIGSYS    = 0xc
+	_SIGPIPE   = 0xd
+	_SIGALRM   = 0xe
+	_SIGTERM   = 0xf
+	_SIGURG    = 0x10
+	_SIGSTOP   = 0x11
+	_SIGTSTP   = 0x12
+	_SIGCONT   = 0x13
+	_SIGCHLD   = 0x14
+	_SIGTTIN   = 0x15
+	_SIGTTOU   = 0x16
+	_SIGIO     = 0x17
+	_SIGXCPU   = 0x18
+	_SIGXFSZ   = 0x19
+	_SIGVTALRM = 0x1a
+	_SIGPROF   = 0x1b
+	_SIGWINCH  = 0x1c
+	_SIGINFO   = 0x1d
+	_SIGUSR1   = 0x1e
+	_SIGUSR2   = 0x1f
+
+	_FPE_INTDIV = 0x1
+	_FPE_INTOVF = 0x2
+	_FPE_FLTDIV = 0x3
+	_FPE_FLTOVF = 0x4
+	_FPE_FLTUND = 0x5
+	_FPE_FLTRES = 0x6
+	_FPE_FLTINV = 0x7
+	_FPE_FLTSUB = 0x8
+
+	_BUS_ADRALN = 0x1
+	_BUS_ADRERR = 0x2
+	_BUS_OBJERR = 0x3
+
+	_SEGV_MAPERR = 0x1
+	_SEGV_ACCERR = 0x2
+
+	_ITIMER_REAL    = 0x0
+	_ITIMER_VIRTUAL = 0x1
+	_ITIMER_PROF    = 0x2
+
+	_EV_ADD       = 0x1
+	_EV_DELETE    = 0x2
+	_EV_CLEAR     = 0x20
+	_EV_ERROR     = 0x4000
+	_EV_EOF       = 0x8000
+	_EVFILT_READ  = -0x1
+	_EVFILT_WRITE = -0x2
+)
+
+type tforkt struct {
+	tf_tcb   unsafe.Pointer
+	tf_tid   *int32
+	tf_stack uintptr
+}
+
+type sigcontext struct {
+	__sc_unused int32
+	sc_mask     int32
+	sc_ra       uintptr
+	sc_sp       uintptr
+	sc_gp       uintptr
+	sc_tp       uintptr
+	sc_t        [7]uintptr
+	sc_s        [12]uintptr
+	sc_a        [8]uintptr
+	sc_sepc     uintptr
+	sc_f        [32]uintptr
+	sc_fcsr     uintptr
+	sc_cookie   int64
+}
+
+type siginfo struct {
+	si_signo  int32
+	si_code   int32
+	si_errno  int32
+	pad_cgo_0 [4]byte
+	_data     [120]byte
+}
+
+type stackt struct {
+	ss_sp     uintptr
+	ss_size   uintptr
+	ss_flags  int32
+	pad_cgo_0 [4]byte
+}
+
+type timespec struct {
+	tv_sec  int64
+	tv_nsec int64
+}
+
+//go:nosplit
+func (ts *timespec) setNsec(ns int64) {
+	ts.tv_sec = ns / 1e9
+	ts.tv_nsec = ns % 1e9
+}
+
+type timeval struct {
+	tv_sec  int64
+	tv_usec int64
+}
+
+func (tv *timeval) set_usec(x int32) {
+	tv.tv_usec = int64(x)
+}
+
+type itimerval struct {
+	it_interval timeval
+	it_value    timeval
+}
+
+type keventt struct {
+	ident  uint64
+	filter int16
+	flags  uint16
+	fflags uint32
+	data   int64
+	udata  *byte
+}
+
+type pthread uintptr
+type pthreadattr uintptr
+type pthreadcond uintptr
+type pthreadcondattr uintptr
+type pthreadmutex uintptr
+type pthreadmutexattr uintptr
diff --git a/src/runtime/rt0_openbsd_riscv64.s b/src/runtime/rt0_openbsd_riscv64.s
@@ -0,0 +1,14 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+TEXT _rt0_riscv64_openbsd(SB),NOSPLIT|NOFRAME,$0
+	MOV	0(X2), A0	// argc
+	ADD	$8, X2, A1	// argv
+	JMP	main(SB)
+
+TEXT main(SB),NOSPLIT|NOFRAME,$0
+	MOV	$runtime·rt0_go(SB), T0
+	JALR	ZERO, T0
diff --git a/src/runtime/signal_openbsd_riscv64.go b/src/runtime/signal_openbsd_riscv64.go
@@ -0,0 +1,72 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import (
+	"internal/goarch"
+	"unsafe"
+)
+
+type sigctxt struct {
+	info *siginfo
+	ctxt unsafe.Pointer
+}
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) regs() *sigcontext {
+	return (*sigcontext)(c.ctxt)
+}
+
+func (c *sigctxt) ra() uint64  { return uint64(c.regs().sc_ra) }
+func (c *sigctxt) sp() uint64  { return uint64(c.regs().sc_sp) }
+func (c *sigctxt) gp() uint64  { return uint64(c.regs().sc_gp) }
+func (c *sigctxt) tp() uint64  { return uint64(c.regs().sc_tp) }
+func (c *sigctxt) t0() uint64  { return uint64(c.regs().sc_t[0]) }
+func (c *sigctxt) t1() uint64  { return uint64(c.regs().sc_t[1]) }
+func (c *sigctxt) t2() uint64  { return uint64(c.regs().sc_t[2]) }
+func (c *sigctxt) s0() uint64  { return uint64(c.regs().sc_s[0]) }
+func (c *sigctxt) s1() uint64  { return uint64(c.regs().sc_s[1]) }
+func (c *sigctxt) a0() uint64  { return uint64(c.regs().sc_a[0]) }
+func (c *sigctxt) a1() uint64  { return uint64(c.regs().sc_a[1]) }
+func (c *sigctxt) a2() uint64  { return uint64(c.regs().sc_a[2]) }
+func (c *sigctxt) a3() uint64  { return uint64(c.regs().sc_a[3]) }
+func (c *sigctxt) a4() uint64  { return uint64(c.regs().sc_a[4]) }
+func (c *sigctxt) a5() uint64  { return uint64(c.regs().sc_a[5]) }
+func (c *sigctxt) a6() uint64  { return uint64(c.regs().sc_a[6]) }
+func (c *sigctxt) a7() uint64  { return uint64(c.regs().sc_a[7]) }
+func (c *sigctxt) s2() uint64  { return uint64(c.regs().sc_s[2]) }
+func (c *sigctxt) s3() uint64  { return uint64(c.regs().sc_s[3]) }
+func (c *sigctxt) s4() uint64  { return uint64(c.regs().sc_s[4]) }
+func (c *sigctxt) s5() uint64  { return uint64(c.regs().sc_s[5]) }
+func (c *sigctxt) s6() uint64  { return uint64(c.regs().sc_s[6]) }
+func (c *sigctxt) s7() uint64  { return uint64(c.regs().sc_s[7]) }
+func (c *sigctxt) s8() uint64  { return uint64(c.regs().sc_s[8]) }
+func (c *sigctxt) s9() uint64  { return uint64(c.regs().sc_s[9]) }
+func (c *sigctxt) s10() uint64 { return uint64(c.regs().sc_s[10]) }
+func (c *sigctxt) s11() uint64 { return uint64(c.regs().sc_s[11]) }
+func (c *sigctxt) t3() uint64  { return uint64(c.regs().sc_t[3]) }
+func (c *sigctxt) t4() uint64  { return uint64(c.regs().sc_t[4]) }
+func (c *sigctxt) t5() uint64  { return uint64(c.regs().sc_t[5]) }
+func (c *sigctxt) t6() uint64  { return uint64(c.regs().sc_t[6]) }
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) pc() uint64 { return uint64(c.regs().sc_sepc) }
+
+func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
+func (c *sigctxt) sigaddr() uint64 {
+	return *(*uint64)(add(unsafe.Pointer(c.info), 2*goarch.PtrSize))
+}
+
+func (c *sigctxt) set_pc(x uint64) { c.regs().sc_sepc = uintptr(x) }
+func (c *sigctxt) set_ra(x uint64) { c.regs().sc_ra = uintptr(x) }
+func (c *sigctxt) set_sp(x uint64) { c.regs().sc_sp = uintptr(x) }
+func (c *sigctxt) set_gp(x uint64) { c.regs().sc_gp = uintptr(x) }
+
+func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
+func (c *sigctxt) set_sigaddr(x uint64) {
+	*(*uintptr)(add(unsafe.Pointer(c.info), 2*goarch.PtrSize)) = uintptr(x)
+}
diff --git a/src/runtime/signal_riscv64.go b/src/runtime/signal_riscv64.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (linux || freebsd) && riscv64
+//go:build (linux || freebsd || openbsd) && riscv64
 
 package runtime
 
diff --git a/src/runtime/stubs_riscv64.go b/src/runtime/stubs_riscv64.go
@@ -4,10 +4,15 @@
 
 package runtime
 
+import "unsafe"
+
 // Called from assembly only; declared for go vet.
 func load_g()
 func save_g()
 
+//go:noescape
+func asmcgocall_no_g(fn, arg unsafe.Pointer)
+
 // Used by reflectcall and the reflect package.
 //
 // Spills/loads arguments in registers to/from an internal/abi.RegArgs
diff --git a/src/runtime/sys_openbsd_riscv64.s b/src/runtime/sys_openbsd_riscv64.s
diff --git a/src/runtime/tls_riscv64.s b/src/runtime/tls_riscv64.s
