1 files changed, 112 insertions, 0 deletions
diff --git a/src/runtime/signal_ppc64x.go b/src/runtime/signal_ppc64x.go
new file mode 100644
index 0000000..b5722f9
--- /dev/null
+++ b/src/runtime/signal_ppc64x.go
@@ -0,0 +1,112 @@
+// Copyright 2014 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 (aix || linux || openbsd) && (ppc64 || ppc64le)
+
+package runtime
+
+import (
+	"internal/abi"
+	"runtime/internal/sys"
+	"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("ctr  ", hex(c.ctr()), "\n")
+	print("link ", hex(c.link()), "\t")
+	print("xer  ", hex(c.xer()), "\n")
+	print("ccr  ", hex(c.ccr()), "\t")
+	print("trap ", hex(c.trap()), "\n")
+}
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) sigpc() uintptr    { return uintptr(c.pc()) }
+func (c *sigctxt) setsigpc(x uint64) { c.set_pc(x) }
+
+func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
+func (c *sigctxt) siglr() uintptr { return uintptr(c.link()) }
+
+// 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() - sys.MinFrameSize
+	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
+	c.set_r0(0)
+	c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
+	c.set_r12(uint64(abi.FuncPCABIInternal(sigpanic)))
+	c.set_pc(uint64(abi.FuncPCABIInternal(sigpanic)))
+}
+
+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 space is known to gentraceback.
+	sp := c.sp() - sys.MinFrameSize
+	c.set_sp(sp)
+	*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
+	// In PIC mode, we'll set up (i.e. clobber) R2 on function
+	// entry. Save it ahead of time.
+	// In PIC mode it requires R12 points to the function entry,
+	// so we'll set it up when pushing the call. Save it ahead
+	// of time as well.
+	// 8(SP) and 16(SP) are unused space in the reserved
+	// MinFrameSize (32) bytes.
+	*(*uint64)(unsafe.Pointer(uintptr(sp) + 8)) = c.r2()
+	*(*uint64)(unsafe.Pointer(uintptr(sp) + 16)) = c.r12()
+	// Set up PC and LR to pretend the function being signaled
+	// calls targetPC at resumePC.
+	c.set_link(uint64(resumePC))
+	c.set_r12(uint64(targetPC))
+	c.set_pc(uint64(targetPC))
+}