github.com/stingnevermore/go@v0.0.0-20180120041312-3810f5bfed72/src/runtime/signal_arm64.go (about)

     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 linux darwin
     6  
     7  package runtime
     8  
     9  import (
    10  	"runtime/internal/sys"
    11  	"unsafe"
    12  )
    13  
    14  func dumpregs(c *sigctxt) {
    15  	print("r0      ", hex(c.r0()), "\n")
    16  	print("r1      ", hex(c.r1()), "\n")
    17  	print("r2      ", hex(c.r2()), "\n")
    18  	print("r3      ", hex(c.r3()), "\n")
    19  	print("r4      ", hex(c.r4()), "\n")
    20  	print("r5      ", hex(c.r5()), "\n")
    21  	print("r6      ", hex(c.r6()), "\n")
    22  	print("r7      ", hex(c.r7()), "\n")
    23  	print("r8      ", hex(c.r8()), "\n")
    24  	print("r9      ", hex(c.r9()), "\n")
    25  	print("r10     ", hex(c.r10()), "\n")
    26  	print("r11     ", hex(c.r11()), "\n")
    27  	print("r12     ", hex(c.r12()), "\n")
    28  	print("r13     ", hex(c.r13()), "\n")
    29  	print("r14     ", hex(c.r14()), "\n")
    30  	print("r15     ", hex(c.r15()), "\n")
    31  	print("r16     ", hex(c.r16()), "\n")
    32  	print("r17     ", hex(c.r17()), "\n")
    33  	print("r18     ", hex(c.r18()), "\n")
    34  	print("r19     ", hex(c.r19()), "\n")
    35  	print("r20     ", hex(c.r20()), "\n")
    36  	print("r21     ", hex(c.r21()), "\n")
    37  	print("r22     ", hex(c.r22()), "\n")
    38  	print("r23     ", hex(c.r23()), "\n")
    39  	print("r24     ", hex(c.r24()), "\n")
    40  	print("r25     ", hex(c.r25()), "\n")
    41  	print("r26     ", hex(c.r26()), "\n")
    42  	print("r27     ", hex(c.r27()), "\n")
    43  	print("r28     ", hex(c.r28()), "\n")
    44  	print("r29     ", hex(c.r29()), "\n")
    45  	print("lr      ", hex(c.lr()), "\n")
    46  	print("sp      ", hex(c.sp()), "\n")
    47  	print("pc      ", hex(c.pc()), "\n")
    48  	print("fault   ", hex(c.fault()), "\n")
    49  }
    50  
    51  //go:nosplit
    52  //go:nowritebarrierrec
    53  func (c *sigctxt) sigpc() uintptr { return uintptr(c.pc()) }
    54  
    55  func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
    56  func (c *sigctxt) siglr() uintptr { return uintptr(c.lr()) }
    57  
    58  // preparePanic sets up the stack to look like a call to sigpanic.
    59  func (c *sigctxt) preparePanic(sig uint32, gp *g) {
    60  	// We arrange lr, and pc to pretend the panicking
    61  	// function calls sigpanic directly.
    62  	// Always save LR to stack so that panics in leaf
    63  	// functions are correctly handled. This smashes
    64  	// the stack frame but we're not going back there
    65  	// anyway.
    66  	sp := c.sp() - sys.SpAlign // needs only sizeof uint64, but must align the stack
    67  	c.set_sp(sp)
    68  	*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.lr()
    69  
    70  	pc := gp.sigpc
    71  
    72  	// If we don't recognize the PC as code
    73  	// but we do recognize the link register as code,
    74  	// then assume this was a call to non-code and treat like
    75  	// pc == 0, to make unwinding show the context.
    76  	if pc != 0 && !findfunc(pc).valid() && findfunc(uintptr(c.lr())).valid() {
    77  		pc = 0
    78  	}
    79  
    80  	// Don't bother saving PC if it's zero, which is
    81  	// probably a call to a nil func: the old link register
    82  	// is more useful in the stack trace.
    83  	if pc != 0 {
    84  		c.set_lr(uint64(pc))
    85  	}
    86  
    87  	// In case we are panicking from external C code
    88  	c.set_r28(uint64(uintptr(unsafe.Pointer(gp))))
    89  	c.set_pc(uint64(funcPC(sigpanic)))
    90  }