Source file src/runtime/signal_ppc64x.go

     1	// Copyright 2014 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build aix linux
     6	// +build ppc64 ppc64le
     7	
     8	package runtime
     9	
    10	import (
    11		"runtime/internal/sys"
    12		"unsafe"
    13	)
    14	
    15	func dumpregs(c *sigctxt) {
    16		print("r0   ", hex(c.r0()), "\t")
    17		print("r1   ", hex(c.r1()), "\n")
    18		print("r2   ", hex(c.r2()), "\t")
    19		print("r3   ", hex(c.r3()), "\n")
    20		print("r4   ", hex(c.r4()), "\t")
    21		print("r5   ", hex(c.r5()), "\n")
    22		print("r6   ", hex(c.r6()), "\t")
    23		print("r7   ", hex(c.r7()), "\n")
    24		print("r8   ", hex(c.r8()), "\t")
    25		print("r9   ", hex(c.r9()), "\n")
    26		print("r10  ", hex(c.r10()), "\t")
    27		print("r11  ", hex(c.r11()), "\n")
    28		print("r12  ", hex(c.r12()), "\t")
    29		print("r13  ", hex(c.r13()), "\n")
    30		print("r14  ", hex(c.r14()), "\t")
    31		print("r15  ", hex(c.r15()), "\n")
    32		print("r16  ", hex(c.r16()), "\t")
    33		print("r17  ", hex(c.r17()), "\n")
    34		print("r18  ", hex(c.r18()), "\t")
    35		print("r19  ", hex(c.r19()), "\n")
    36		print("r20  ", hex(c.r20()), "\t")
    37		print("r21  ", hex(c.r21()), "\n")
    38		print("r22  ", hex(c.r22()), "\t")
    39		print("r23  ", hex(c.r23()), "\n")
    40		print("r24  ", hex(c.r24()), "\t")
    41		print("r25  ", hex(c.r25()), "\n")
    42		print("r26  ", hex(c.r26()), "\t")
    43		print("r27  ", hex(c.r27()), "\n")
    44		print("r28  ", hex(c.r28()), "\t")
    45		print("r29  ", hex(c.r29()), "\n")
    46		print("r30  ", hex(c.r30()), "\t")
    47		print("r31  ", hex(c.r31()), "\n")
    48		print("pc   ", hex(c.pc()), "\t")
    49		print("ctr  ", hex(c.ctr()), "\n")
    50		print("link ", hex(c.link()), "\t")
    51		print("xer  ", hex(c.xer()), "\n")
    52		print("ccr  ", hex(c.ccr()), "\t")
    53		print("trap ", hex(c.trap()), "\n")
    54	}
    55	
    56	//go:nosplit
    57	//go:nowritebarrierrec
    58	func (c *sigctxt) sigpc() uintptr { return uintptr(c.pc()) }
    59	
    60	func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
    61	func (c *sigctxt) siglr() uintptr { return uintptr(c.link()) }
    62	
    63	// preparePanic sets up the stack to look like a call to sigpanic.
    64	func (c *sigctxt) preparePanic(sig uint32, gp *g) {
    65		// We arrange link, and pc to pretend the panicking
    66		// function calls sigpanic directly.
    67		// Always save LINK to stack so that panics in leaf
    68		// functions are correctly handled. This smashes
    69		// the stack frame but we're not going back there
    70		// anyway.
    71		sp := c.sp() - sys.MinFrameSize
    72		c.set_sp(sp)
    73		*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
    74	
    75		pc := gp.sigpc
    76	
    77		if shouldPushSigpanic(gp, pc, uintptr(c.link())) {
    78			// Make it look the like faulting PC called sigpanic.
    79			c.set_link(uint64(pc))
    80		}
    81	
    82		// In case we are panicking from external C code
    83		c.set_r0(0)
    84		c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
    85		c.set_r12(uint64(funcPC(sigpanic)))
    86		c.set_pc(uint64(funcPC(sigpanic)))
    87	}
    88	

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