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 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 we don't recognize the PC as code 78 // but we do recognize the link register as code, 79 // then assume this was a call to non-code and treat like 80 // pc == 0, to make unwinding show the context. 81 if pc != 0 && !findfunc(pc).valid() && findfunc(uintptr(c.link())).valid() { 82 pc = 0 83 } 84 85 // Don't bother saving PC if it's zero, which is 86 // probably a call to a nil func: the old link register 87 // is more useful in the stack trace. 88 if pc != 0 { 89 c.set_link(uint64(pc)) 90 } 91 92 // In case we are panicking from external C code 93 c.set_r0(0) 94 c.set_r30(uint64(uintptr(unsafe.Pointer(gp)))) 95 c.set_r12(uint64(funcPC(sigpanic))) 96 c.set_pc(uint64(funcPC(sigpanic))) 97 } 98
