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go/src/runtime/signal_linux_ppc64x.go

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all: make copyright headers consistent with one space after period This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-01 15:57:46 -07:00
// Copyright 2014 The Go Authors. All rights reserved.
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
all: power64 is now ppc64 Fixes #8654. LGTM=austin R=austin CC=golang-codereviews https://golang.org/cl/180600043
2014-12-05 17:13:20 -07:00
// +build ppc64 ppc64le
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
package runtime
runtime: break out system-specific constants into package sys runtime/internal/sys will hold system-, architecture- and config- specific constants. Updates #11647 Change-Id: I6db29c312556087a42e8d2bdd9af40d157c56b54 Reviewed-on: https://go-review.googlesource.com/16817 Reviewed-by: Russ Cox <rsc@golang.org>
2015-11-11 10:39:30 -07:00
import (
"runtime/internal/sys"
"unsafe"
)
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
type sigctxt struct {
info *siginfo
ctxt unsafe.Pointer
}
runtime: record current PC for SIGPROF on non-Go thread If we get a SIGPROF on a non-Go thread, and the program has not called runtime.SetCgoTraceback so we have no way to collect a stack trace, then record a profile that is just the PC where the signal occurred. That will at least point the user to the right area. Retrieving the PC from the sigctxt in a signal handler on a non-G thread required marking a number of trivial sigctxt methods as nosplit, and, for extra safety, nowritebarrierrec. The test shows that the existing test CgoPprofThread test does not test the stack trace, just the profile signal. Leaving that for later. Change-Id: I8f8f3ff09ac099fc9d9df94b5a9d210ffc20c4ab Reviewed-on: https://go-review.googlesource.com/30252 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-10-04 08:11:55 -06:00
//go:nosplit
//go:nowritebarrierrec
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
func (c *sigctxt) regs() *ptregs { return (*ucontext)(c.ctxt).uc_mcontext.regs }
runtime: record current PC for SIGPROF on non-Go thread If we get a SIGPROF on a non-Go thread, and the program has not called runtime.SetCgoTraceback so we have no way to collect a stack trace, then record a profile that is just the PC where the signal occurred. That will at least point the user to the right area. Retrieving the PC from the sigctxt in a signal handler on a non-G thread required marking a number of trivial sigctxt methods as nosplit, and, for extra safety, nowritebarrierrec. The test shows that the existing test CgoPprofThread test does not test the stack trace, just the profile signal. Leaving that for later. Change-Id: I8f8f3ff09ac099fc9d9df94b5a9d210ffc20c4ab Reviewed-on: https://go-review.googlesource.com/30252 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-10-04 08:11:55 -06:00
func (c *sigctxt) r0() uint64 { return c.regs().gpr[0] }
func (c *sigctxt) r1() uint64 { return c.regs().gpr[1] }
func (c *sigctxt) r2() uint64 { return c.regs().gpr[2] }
func (c *sigctxt) r3() uint64 { return c.regs().gpr[3] }
func (c *sigctxt) r4() uint64 { return c.regs().gpr[4] }
func (c *sigctxt) r5() uint64 { return c.regs().gpr[5] }
func (c *sigctxt) r6() uint64 { return c.regs().gpr[6] }
func (c *sigctxt) r7() uint64 { return c.regs().gpr[7] }
func (c *sigctxt) r8() uint64 { return c.regs().gpr[8] }
func (c *sigctxt) r9() uint64 { return c.regs().gpr[9] }
func (c *sigctxt) r10() uint64 { return c.regs().gpr[10] }
func (c *sigctxt) r11() uint64 { return c.regs().gpr[11] }
func (c *sigctxt) r12() uint64 { return c.regs().gpr[12] }
func (c *sigctxt) r13() uint64 { return c.regs().gpr[13] }
func (c *sigctxt) r14() uint64 { return c.regs().gpr[14] }
func (c *sigctxt) r15() uint64 { return c.regs().gpr[15] }
func (c *sigctxt) r16() uint64 { return c.regs().gpr[16] }
func (c *sigctxt) r17() uint64 { return c.regs().gpr[17] }
func (c *sigctxt) r18() uint64 { return c.regs().gpr[18] }
func (c *sigctxt) r19() uint64 { return c.regs().gpr[19] }
func (c *sigctxt) r20() uint64 { return c.regs().gpr[20] }
func (c *sigctxt) r21() uint64 { return c.regs().gpr[21] }
func (c *sigctxt) r22() uint64 { return c.regs().gpr[22] }
func (c *sigctxt) r23() uint64 { return c.regs().gpr[23] }
func (c *sigctxt) r24() uint64 { return c.regs().gpr[24] }
func (c *sigctxt) r25() uint64 { return c.regs().gpr[25] }
func (c *sigctxt) r26() uint64 { return c.regs().gpr[26] }
func (c *sigctxt) r27() uint64 { return c.regs().gpr[27] }
func (c *sigctxt) r28() uint64 { return c.regs().gpr[28] }
func (c *sigctxt) r29() uint64 { return c.regs().gpr[29] }
func (c *sigctxt) r30() uint64 { return c.regs().gpr[30] }
func (c *sigctxt) r31() uint64 { return c.regs().gpr[31] }
func (c *sigctxt) sp() uint64 { return c.regs().gpr[1] }
//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) pc() uint64 { return c.regs().nip }
func (c *sigctxt) trap() uint64 { return c.regs().trap }
func (c *sigctxt) ctr() uint64 { return c.regs().ctr }
func (c *sigctxt) link() uint64 { return c.regs().link }
func (c *sigctxt) xer() uint64 { return c.regs().xer }
func (c *sigctxt) ccr() uint64 { return c.regs().ccr }
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
[dev.cc] runtime: add explicit siginfo.si_addr field struct siginfo_t's si_addr field is part of a union. Previously, we represented this union in Go using an opaque byte array and accessed the si_addr field using unsafe (and wrong on 386 and arm!) pointer arithmetic. Since si_addr is the only field we use from this union, this replaces the opaque byte array with an explicit declaration of the si_addr field and accesses it directly. LGTM=minux, rsc R=rsc, minux CC=golang-codereviews https://golang.org/cl/179970044
2014-11-19 12:56:49 -07:00
func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
func (c *sigctxt) fault() uint64 { return c.regs().dar }
func (c *sigctxt) set_r0(x uint64) { c.regs().gpr[0] = x }
runtime: set r12 to sigpanic before jumping to it in sighandler The ppc64le shared library ABI demands that r12 is set to a function's global entrypoint before jumping to the global entrypoint. Not doing so means that handling signals that usually panic actually crashes (and so, e.g. can't be recovered). Fixes several failures of "cd test; go run run.go -linkshared". Change-Id: Ia4d0da4c13efda68340d38c045a52b37c2f90796 Reviewed-on: https://go-review.googlesource.com/17280 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-11-30 18:47:22 -07:00
func (c *sigctxt) set_r12(x uint64) { c.regs().gpr[12] = x }
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
func (c *sigctxt) set_r30(x uint64) { c.regs().gpr[30] = x }
func (c *sigctxt) set_pc(x uint64) { c.regs().nip = x }
func (c *sigctxt) set_sp(x uint64) { c.regs().gpr[1] = x }
func (c *sigctxt) set_link(x uint64) { c.regs().link = x }
func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
func (c *sigctxt) set_sigaddr(x uint64) {
runtime: break out system-specific constants into package sys runtime/internal/sys will hold system-, architecture- and config- specific constants. Updates #11647 Change-Id: I6db29c312556087a42e8d2bdd9af40d157c56b54 Reviewed-on: https://go-review.googlesource.com/16817 Reviewed-by: Russ Cox <rsc@golang.org>
2015-11-11 10:39:30 -07:00
*(*uintptr)(add(unsafe.Pointer(c.info), 2*sys.PtrSize)) = uintptr(x)
[dev.cc] runtime: convert power64 signal handlers from C to Go The power64 equivalent of CL 168500044 LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/175280043
2014-11-18 13:19:09 -07:00
}
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