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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/runtime/signal_mips64x.go | |
parent | Initial commit. (diff) | |
download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/signal_mips64x.go')
-rw-r--r-- | src/runtime/signal_mips64x.go | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/runtime/signal_mips64x.go b/src/runtime/signal_mips64x.go new file mode 100644 index 0000000..cee1bf7 --- /dev/null +++ b/src/runtime/signal_mips64x.go @@ -0,0 +1,100 @@ +// Copyright 2015 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. + +//go:build (linux || openbsd) && (mips64 || mips64le) + +package runtime + +import ( + "internal/abi" + "internal/goarch" + "unsafe" +) + +func dumpregs(c *sigctxt) { + print("r0 ", hex(c.r0()), "\t") + print("r1 ", hex(c.r1()), "\n") + print("r2 ", hex(c.r2()), "\t") + print("r3 ", hex(c.r3()), "\n") + print("r4 ", hex(c.r4()), "\t") + print("r5 ", hex(c.r5()), "\n") + print("r6 ", hex(c.r6()), "\t") + print("r7 ", hex(c.r7()), "\n") + print("r8 ", hex(c.r8()), "\t") + print("r9 ", hex(c.r9()), "\n") + print("r10 ", hex(c.r10()), "\t") + print("r11 ", hex(c.r11()), "\n") + print("r12 ", hex(c.r12()), "\t") + print("r13 ", hex(c.r13()), "\n") + print("r14 ", hex(c.r14()), "\t") + print("r15 ", hex(c.r15()), "\n") + print("r16 ", hex(c.r16()), "\t") + print("r17 ", hex(c.r17()), "\n") + print("r18 ", hex(c.r18()), "\t") + print("r19 ", hex(c.r19()), "\n") + print("r20 ", hex(c.r20()), "\t") + print("r21 ", hex(c.r21()), "\n") + print("r22 ", hex(c.r22()), "\t") + print("r23 ", hex(c.r23()), "\n") + print("r24 ", hex(c.r24()), "\t") + print("r25 ", hex(c.r25()), "\n") + print("r26 ", hex(c.r26()), "\t") + print("r27 ", hex(c.r27()), "\n") + print("r28 ", hex(c.r28()), "\t") + print("r29 ", hex(c.r29()), "\n") + print("r30 ", hex(c.r30()), "\t") + print("r31 ", hex(c.r31()), "\n") + print("pc ", hex(c.pc()), "\t") + print("link ", hex(c.link()), "\n") + print("lo ", hex(c.lo()), "\t") + print("hi ", hex(c.hi()), "\n") +} + +//go:nosplit +//go:nowritebarrierrec +func (c *sigctxt) sigpc() uintptr { return uintptr(c.pc()) } + +func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) } +func (c *sigctxt) siglr() uintptr { return uintptr(c.link()) } +func (c *sigctxt) fault() uintptr { return uintptr(c.sigaddr()) } + +// preparePanic sets up the stack to look like a call to sigpanic. +func (c *sigctxt) preparePanic(sig uint32, gp *g) { + // We arrange link, and pc to pretend the panicking + // function calls sigpanic directly. + // Always save LINK to stack so that panics in leaf + // functions are correctly handled. This smashes + // the stack frame but we're not going back there + // anyway. + sp := c.sp() - goarch.PtrSize + c.set_sp(sp) + *(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link() + + pc := gp.sigpc + + if shouldPushSigpanic(gp, pc, uintptr(c.link())) { + // Make it look the like faulting PC called sigpanic. + c.set_link(uint64(pc)) + } + + // In case we are panicking from external C code + sigpanicPC := uint64(abi.FuncPCABIInternal(sigpanic)) + c.set_r28(sigpanicPC >> 32 << 32) // RSB register + c.set_r30(uint64(uintptr(unsafe.Pointer(gp)))) + c.set_pc(sigpanicPC) +} + +func (c *sigctxt) pushCall(targetPC, resumePC uintptr) { + // Push the LR to stack, as we'll clobber it in order to + // push the call. The function being pushed is responsible + // for restoring the LR and setting the SP back. + // This extra slot is known to gentraceback. + sp := c.sp() - 8 + c.set_sp(sp) + *(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link() + // Set up PC and LR to pretend the function being signaled + // calls targetPC at resumePC. + c.set_link(uint64(resumePC)) + c.set_pc(uint64(targetPC)) +} |