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6f2ef5ec98
It was carryover from the mips64 port (where it represented the platform GP register) but LoongArch platform ABI doesn't have the GP concept. Change-Id: Iea326ae13676e95b040b52aaadc08d311b507bd3 Reviewed-on: https://go-review.googlesource.com/c/go/+/475815 Reviewed-by: abner chenc <chenguoqi@loongson.cn> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
97 lines
3.0 KiB
Go
97 lines
3.0 KiB
Go
// Copyright 2022 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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//go:build linux && loong64
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package runtime
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import (
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"internal/abi"
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"internal/goarch"
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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("link ", hex(c.link()), "\n")
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}
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//go:nosplit
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//go:nowritebarrierrec
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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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func (c *sigctxt) fault() uintptr { return uintptr(c.sigaddr()) }
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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() - goarch.PtrSize
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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 shouldPushSigpanic(gp, pc, uintptr(c.link())) {
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// Make it look the like faulting PC called sigpanic.
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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_r22(uint64(uintptr(unsafe.Pointer(gp))))
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c.set_pc(uint64(abi.FuncPCABIInternal(sigpanic)))
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}
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func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
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// Push the LR to stack, as we'll clobber it in order to
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// push the call. The function being pushed is responsible
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// for restoring the LR and setting the SP back.
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// This extra slot is known to gentraceback.
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sp := c.sp() - 8
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c.set_sp(sp)
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*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
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// Set up PC and LR to pretend the function being signaled
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// calls targetPC at resumePC.
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c.set_link(uint64(resumePC))
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c.set_pc(uint64(targetPC))
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}
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