runtime: add support for openbsd/arm64

4a6f656c · bradfitz · commit 3d94dd78d464 · 2019-04-26T17:34:45.000Z
Updates #31656 Change-Id: I0b7486f7381fd8bd16a76278c0e9ec9763671fcc Reviewed-on: https://go-review.googlesource.com/c/go/+/174119 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/runtime/defs_openbsd_arm64.go b/src/runtime/defs_openbsd_arm64.go
@@ -0,0 +1,150 @@
+package runtime
+
+import "unsafe"
+
+const (
+	_EINTR  = 0x4
+	_EFAULT = 0xe
+
+	_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_FREE = 0x6
+
+	_SA_SIGINFO = 0x40
+	_SA_RESTART = 0x2
+	_SA_ONSTACK = 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_sp       uintptr
+	sc_lr       uintptr
+	sc_elr      uintptr
+	sc_spsr     uintptr
+	sc_x        [30]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
+}
diff --git a/src/runtime/os_openbsd_arm64.go b/src/runtime/os_openbsd_arm64.go
@@ -0,0 +1,13 @@
+// Copyright 2019 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
+
+//go:nosplit
+func cputicks() int64 {
+	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
+	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
+	// TODO: need more entropy to better seed fastrand.
+	return nanotime()
+}
diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
@@ -194,7 +194,7 @@ func testCPUProfile(t *testing.T, matches matchFunc, need []string, avoid []stri
 	case "darwin", "dragonfly", "netbsd", "solaris":
 		t.Skipf("ignoring failure on %s; see golang.org/issue/13841", runtime.GOOS)
 	case "openbsd":
-		if runtime.GOARCH == "arm" {
+		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
 			t.Skipf("ignoring failure on %s/%s; see golang.org/issue/13841", runtime.GOOS, runtime.GOARCH)
 		}
 	}
diff --git a/src/runtime/rt0_openbsd_arm64.s b/src/runtime/rt0_openbsd_arm64.s
@@ -0,0 +1,105 @@
+// Copyright 2019 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_arm64_openbsd(SB),NOSPLIT|NOFRAME,$0
+	MOVD	0(RSP), R0	// argc
+	ADD	$8, RSP, R1	// argv
+	BL	main(SB)
+
+// When building with -buildmode=c-shared, this symbol is called when the shared
+// library is loaded.
+TEXT _rt0_arm64_openbsd_lib(SB),NOSPLIT,$184
+	// Preserve callee-save registers.
+	MOVD R19, 24(RSP)
+	MOVD R20, 32(RSP)
+	MOVD R21, 40(RSP)
+	MOVD R22, 48(RSP)
+	MOVD R23, 56(RSP)
+	MOVD R24, 64(RSP)
+	MOVD R25, 72(RSP)
+	MOVD R26, 80(RSP)
+	MOVD R27, 88(RSP)
+	FMOVD F8, 96(RSP)
+	FMOVD F9, 104(RSP)
+	FMOVD F10, 112(RSP)
+	FMOVD F11, 120(RSP)
+	FMOVD F12, 128(RSP)
+	FMOVD F13, 136(RSP)
+	FMOVD F14, 144(RSP)
+	FMOVD F15, 152(RSP)
+	MOVD g, 160(RSP)
+
+	// Initialize g as null in case of using g later e.g. sigaction in cgo_sigaction.go
+	MOVD	ZR, g
+
+	MOVD	R0, _rt0_arm64_openbsd_lib_argc<>(SB)
+	MOVD	R1, _rt0_arm64_openbsd_lib_argv<>(SB)
+
+	// Synchronous initialization.
+	MOVD	$runtime·libpreinit(SB), R4
+	BL	(R4)
+
+	// Create a new thread to do the runtime initialization and return.
+	MOVD	_cgo_sys_thread_create(SB), R4
+	CMP	$0, R4
+	BEQ	nocgo
+	MOVD	$_rt0_arm64_openbsd_lib_go(SB), R0
+	MOVD	$0, R1
+	SUB	$16, RSP		// reserve 16 bytes for sp-8 where fp may be saved.
+	BL	(R4)
+	ADD	$16, RSP
+	B	restore
+
+nocgo:
+	MOVD	$0x800000, R0                     // stacksize = 8192KB
+	MOVD	$_rt0_arm64_openbsd_lib_go(SB), R1
+	MOVD	R0, 8(RSP)
+	MOVD	R1, 16(RSP)
+	MOVD	$runtime·newosproc0(SB),R4
+	BL	(R4)
+
+restore:
+	// Restore callee-save registers.
+	MOVD 24(RSP), R19
+	MOVD 32(RSP), R20
+	MOVD 40(RSP), R21
+	MOVD 48(RSP), R22
+	MOVD 56(RSP), R23
+	MOVD 64(RSP), R24
+	MOVD 72(RSP), R25
+	MOVD 80(RSP), R26
+	MOVD 88(RSP), R27
+	FMOVD 96(RSP), F8
+	FMOVD 104(RSP), F9
+	FMOVD 112(RSP), F10
+	FMOVD 120(RSP), F11
+	FMOVD 128(RSP), F12
+	FMOVD 136(RSP), F13
+	FMOVD 144(RSP), F14
+	FMOVD 152(RSP), F15
+	MOVD 160(RSP), g
+	RET
+
+TEXT _rt0_arm64_openbsd_lib_go(SB),NOSPLIT,$0
+	MOVD	_rt0_arm64_openbsd_lib_argc<>(SB), R0
+	MOVD	_rt0_arm64_openbsd_lib_argv<>(SB), R1
+	MOVD	$runtime·rt0_go(SB),R4
+	B       (R4)
+
+DATA _rt0_arm64_openbsd_lib_argc<>(SB)/8, $0
+GLOBL _rt0_arm64_openbsd_lib_argc<>(SB),NOPTR, $8
+DATA _rt0_arm64_openbsd_lib_argv<>(SB)/8, $0
+GLOBL _rt0_arm64_openbsd_lib_argv<>(SB),NOPTR, $8
+
+
+TEXT main(SB),NOSPLIT|NOFRAME,$0
+	MOVD	$runtime·rt0_go(SB), R2
+	BL	(R2)
+exit:
+	MOVD	$0, R0
+	MOVD	$1, R8		// sys_exit
+	SVC
+	B	exit
diff --git a/src/runtime/signal_arm64.go b/src/runtime/signal_arm64.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.
 
-// +build linux darwin netbsd
+// +build darwin linux netbsd openbsd
 
 package runtime
 
diff --git a/src/runtime/signal_openbsd_arm64.go b/src/runtime/signal_openbsd_arm64.go
@@ -0,0 +1,75 @@
+// Copyright 2019 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"
+
+type sigctxt struct {
+	info *siginfo
+	ctxt unsafe.Pointer
+}
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) regs() *sigcontext {
+	return (*sigcontext)(c.ctxt)
+}
+
+func (c *sigctxt) r0() uint64  { return (uint64)(c.regs().sc_x[0]) }
+func (c *sigctxt) r1() uint64  { return (uint64)(c.regs().sc_x[1]) }
+func (c *sigctxt) r2() uint64  { return (uint64)(c.regs().sc_x[2]) }
+func (c *sigctxt) r3() uint64  { return (uint64)(c.regs().sc_x[3]) }
+func (c *sigctxt) r4() uint64  { return (uint64)(c.regs().sc_x[4]) }
+func (c *sigctxt) r5() uint64  { return (uint64)(c.regs().sc_x[5]) }
+func (c *sigctxt) r6() uint64  { return (uint64)(c.regs().sc_x[6]) }
+func (c *sigctxt) r7() uint64  { return (uint64)(c.regs().sc_x[7]) }
+func (c *sigctxt) r8() uint64  { return (uint64)(c.regs().sc_x[8]) }
+func (c *sigctxt) r9() uint64  { return (uint64)(c.regs().sc_x[9]) }
+func (c *sigctxt) r10() uint64 { return (uint64)(c.regs().sc_x[10]) }
+func (c *sigctxt) r11() uint64 { return (uint64)(c.regs().sc_x[11]) }
+func (c *sigctxt) r12() uint64 { return (uint64)(c.regs().sc_x[12]) }
+func (c *sigctxt) r13() uint64 { return (uint64)(c.regs().sc_x[13]) }
+func (c *sigctxt) r14() uint64 { return (uint64)(c.regs().sc_x[14]) }
+func (c *sigctxt) r15() uint64 { return (uint64)(c.regs().sc_x[15]) }
+func (c *sigctxt) r16() uint64 { return (uint64)(c.regs().sc_x[16]) }
+func (c *sigctxt) r17() uint64 { return (uint64)(c.regs().sc_x[17]) }
+func (c *sigctxt) r18() uint64 { return (uint64)(c.regs().sc_x[18]) }
+func (c *sigctxt) r19() uint64 { return (uint64)(c.regs().sc_x[19]) }
+func (c *sigctxt) r20() uint64 { return (uint64)(c.regs().sc_x[20]) }
+func (c *sigctxt) r21() uint64 { return (uint64)(c.regs().sc_x[21]) }
+func (c *sigctxt) r22() uint64 { return (uint64)(c.regs().sc_x[22]) }
+func (c *sigctxt) r23() uint64 { return (uint64)(c.regs().sc_x[23]) }
+func (c *sigctxt) r24() uint64 { return (uint64)(c.regs().sc_x[24]) }
+func (c *sigctxt) r25() uint64 { return (uint64)(c.regs().sc_x[25]) }
+func (c *sigctxt) r26() uint64 { return (uint64)(c.regs().sc_x[26]) }
+func (c *sigctxt) r27() uint64 { return (uint64)(c.regs().sc_x[27]) }
+func (c *sigctxt) r28() uint64 { return (uint64)(c.regs().sc_x[28]) }
+func (c *sigctxt) r29() uint64 { return (uint64)(c.regs().sc_x[29]) }
+func (c *sigctxt) lr() uint64  { return (uint64)(c.regs().sc_lr) }
+func (c *sigctxt) sp() uint64  { return (uint64)(c.regs().sc_sp) }
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) rip() uint64 { return (uint64)(c.regs().sc_lr) } /* XXX */
+
+func (c *sigctxt) fault() uint64   { return c.sigaddr() }
+func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
+func (c *sigctxt) sigaddr() uint64 {
+	return *(*uint64)(add(unsafe.Pointer(c.info), 16))
+}
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) pc() uint64 { return uint64(c.regs().sc_elr) }
+
+func (c *sigctxt) set_pc(x uint64)  { c.regs().sc_elr = uintptr(x) }
+func (c *sigctxt) set_sp(x uint64)  { c.regs().sc_sp = uintptr(x) }
+func (c *sigctxt) set_lr(x uint64)  { c.regs().sc_lr = uintptr(x) }
+func (c *sigctxt) set_r28(x uint64) { c.regs().sc_x[28] = uintptr(x) }
+
+func (c *sigctxt) set_sigcode(x uint64) { c.info.si_code = int32(x) }
+func (c *sigctxt) set_sigaddr(x uint64) {
+	*(*uint64)(add(unsafe.Pointer(c.info), 16)) = x
+}
diff --git a/src/runtime/sys_openbsd_arm.s b/src/runtime/sys_openbsd_arm.s
@@ -86,8 +86,8 @@ TEXT runtime·usleep(SB),NOSPLIT,$16
 	RET
 
 TEXT runtime·raise(SB),NOSPLIT,$12
-	MOVW	$0x12B, R12
-	SWI	$0			// sys_getthrid
+	MOVW	$299, R12		// sys_getthrid
+	SWI	$0
 					// arg 1 - tid, already in R0
 	MOVW	sig+0(FP), R1		// arg 2 - signum
 	MOVW	$0, R2			// arg 3 - tcb
diff --git a/src/runtime/sys_openbsd_arm64.s b/src/runtime/sys_openbsd_arm64.s
diff --git a/src/runtime/tls_arm64.h b/src/runtime/tls_arm64.h

Original file line number	Diff line number	Diff line change
`@@ -194,7 +194,7 @@ func testCPUProfile(t *testing.T, matches matchFunc, need []string, avoid []stri`
`194`	`194`	`case "darwin", "dragonfly", "netbsd", "solaris":`
`195`	`195`	`t.Skipf("ignoring failure on %s; see golang.org/issue/13841", runtime.GOOS)`
`196`	`196`	`case "openbsd":`
`197`		`- if runtime.GOARCH == "arm" {`
	`197`	`+ if runtime.GOARCH == "arm" \|\| runtime.GOARCH == "arm64" {`
`198`	`198`	`t.Skipf("ignoring failure on %s/%s; see golang.org/issue/13841", runtime.GOOS, runtime.GOARCH)`
`199`	`199`	`}`
`200`	`200`	`}`