mirror of
https://github.com/golang/go
synced 2024-10-02 08:18:32 -06:00
159a90b93a
Replace all the Unix sighandler functions with a single instance. Push the relatively small amount of processor-specific code into five methods on sigctxt: sigpc, sigsp, siglr, fault, preparePanic. (Some processors already had a fault method.) Change-Id: Ib459412ff8f7e0f5ad06bfd43eb827c8b196fc32 Reviewed-on: https://go-review.googlesource.com/29752 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Crawshaw <crawshaw@golang.org>
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build linux
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// +build ppc64 ppc64le
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package runtime
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import (
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"runtime/internal/sys"
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"unsafe"
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)
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func dumpregs(c *sigctxt) {
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print("r0 ", hex(c.r0()), "\t")
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print("r1 ", hex(c.r1()), "\n")
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print("r2 ", hex(c.r2()), "\t")
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print("r3 ", hex(c.r3()), "\n")
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print("r4 ", hex(c.r4()), "\t")
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print("r5 ", hex(c.r5()), "\n")
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print("r6 ", hex(c.r6()), "\t")
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print("r7 ", hex(c.r7()), "\n")
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print("r8 ", hex(c.r8()), "\t")
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print("r9 ", hex(c.r9()), "\n")
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print("r10 ", hex(c.r10()), "\t")
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print("r11 ", hex(c.r11()), "\n")
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print("r12 ", hex(c.r12()), "\t")
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print("r13 ", hex(c.r13()), "\n")
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print("r14 ", hex(c.r14()), "\t")
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print("r15 ", hex(c.r15()), "\n")
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print("r16 ", hex(c.r16()), "\t")
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print("r17 ", hex(c.r17()), "\n")
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print("r18 ", hex(c.r18()), "\t")
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print("r19 ", hex(c.r19()), "\n")
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print("r20 ", hex(c.r20()), "\t")
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print("r21 ", hex(c.r21()), "\n")
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print("r22 ", hex(c.r22()), "\t")
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print("r23 ", hex(c.r23()), "\n")
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print("r24 ", hex(c.r24()), "\t")
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print("r25 ", hex(c.r25()), "\n")
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print("r26 ", hex(c.r26()), "\t")
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print("r27 ", hex(c.r27()), "\n")
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print("r28 ", hex(c.r28()), "\t")
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print("r29 ", hex(c.r29()), "\n")
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print("r30 ", hex(c.r30()), "\t")
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print("r31 ", hex(c.r31()), "\n")
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print("pc ", hex(c.pc()), "\t")
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print("ctr ", hex(c.ctr()), "\n")
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print("link ", hex(c.link()), "\t")
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print("xer ", hex(c.xer()), "\n")
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print("ccr ", hex(c.ccr()), "\t")
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print("trap ", hex(c.trap()), "\n")
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}
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func (c *sigctxt) sigpc() uintptr { return uintptr(c.pc()) }
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func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
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func (c *sigctxt) siglr() uintptr { return uintptr(c.link()) }
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// preparePanic sets up the stack to look like a call to sigpanic.
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func (c *sigctxt) preparePanic(sig uint32, gp *g) {
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// We arrange link, and pc to pretend the panicking
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// function calls sigpanic directly.
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// Always save LINK to stack so that panics in leaf
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// functions are correctly handled. This smashes
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// the stack frame but we're not going back there
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// anyway.
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sp := c.sp() - sys.MinFrameSize
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c.set_sp(sp)
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*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
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pc := gp.sigpc
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// If we don't recognize the PC as code
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// but we do recognize the link register as code,
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// then assume this was a call to non-code and treat like
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// pc == 0, to make unwinding show the context.
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if pc != 0 && findfunc(pc) == nil && findfunc(uintptr(c.link())) != nil {
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pc = 0
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}
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// Don't bother saving PC if it's zero, which is
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// probably a call to a nil func: the old link register
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// is more useful in the stack trace.
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if pc != 0 {
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c.set_link(uint64(pc))
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}
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// In case we are panicking from external C code
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c.set_r0(0)
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c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
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c.set_r12(uint64(funcPC(sigpanic)))
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c.set_pc(uint64(funcPC(sigpanic)))
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}
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