Use mod vendor for vendored directory (backwards compatible)

1 files changed, 0 insertions, 1251 deletions

diff --git a/vendor/github.com/google/gops/internal/obj/ppc64/obj9.go b/vendor/github.com/google/gops/internal/obj/ppc64/obj9.go
deleted file mode 100644
index 6cff162c..00000000
--- a/vendor/github.com/google/gops/internal/obj/ppc64/obj9.go
+++ /dev/null
@@ -1,1251 +0,0 @@
-// cmd/9l/noop.c, cmd/9l/pass.c, cmd/9l/span.c from Vita Nuova.
-//
-//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
-//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
-//	Portions Copyright © 1997-1999 Vita Nuova Limited
-//	Portions Copyright © 2000-2008 Vita Nuova Holdings Limited (www.vitanuova.com)
-//	Portions Copyright © 2004,2006 Bruce Ellis
-//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
-//	Revisions Copyright © 2000-2008 Lucent Technologies Inc. and others
-//	Portions Copyright © 2009 The Go Authors. All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-package ppc64
-
-import (
-	"fmt"
-	"math"
-
-	"github.com/google/gops/internal/obj"
-	"github.com/google/gops/internal/sys"
-)
-
-func progedit(ctxt *obj.Link, p *obj.Prog) {
-	p.From.Class = 0
-	p.To.Class = 0
-
-	// Rewrite BR/BL to symbol as TYPE_BRANCH.
-	switch p.As {
-	case ABR,
-		ABL,
-		obj.ARET,
-		obj.ADUFFZERO,
-		obj.ADUFFCOPY:
-		if p.To.Sym != nil {
-			p.To.Type = obj.TYPE_BRANCH
-		}
-	}
-
-	// Rewrite float constants to values stored in memory.
-	switch p.As {
-	case AFMOVS:
-		if p.From.Type == obj.TYPE_FCONST {
-			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := obj.Linklookup(ctxt, literal, 0)
-			s.Size = 4
-			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
-			p.From.Name = obj.NAME_EXTERN
-			p.From.Offset = 0
-		}
-
-	case AFMOVD:
-		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := obj.Linklookup(ctxt, literal, 0)
-			s.Size = 8
-			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
-			p.From.Name = obj.NAME_EXTERN
-			p.From.Offset = 0
-		}
-
-		// Put >32-bit constants in memory and load them
-	case AMOVD:
-		if p.From.Type == obj.TYPE_CONST && p.From.Name == obj.NAME_NONE && p.From.Reg == 0 && int64(int32(p.From.Offset)) != p.From.Offset {
-			literal := fmt.Sprintf("$i64.%016x", uint64(p.From.Offset))
-			s := obj.Linklookup(ctxt, literal, 0)
-			s.Size = 8
-			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
-			p.From.Name = obj.NAME_EXTERN
-			p.From.Offset = 0
-		}
-	}
-
-	// Rewrite SUB constants into ADD.
-	switch p.As {
-	case ASUBC:
-		if p.From.Type == obj.TYPE_CONST {
-			p.From.Offset = -p.From.Offset
-			p.As = AADDC
-		}
-
-	case ASUBCCC:
-		if p.From.Type == obj.TYPE_CONST {
-			p.From.Offset = -p.From.Offset
-			p.As = AADDCCC
-		}
-
-	case ASUB:
-		if p.From.Type == obj.TYPE_CONST {
-			p.From.Offset = -p.From.Offset
-			p.As = AADD
-		}
-	}
-	if ctxt.Flag_dynlink {
-		rewriteToUseGot(ctxt, p)
-	}
-}
-
-// Rewrite p, if necessary, to access global data via the global offset table.
-func rewriteToUseGot(ctxt *obj.Link, p *obj.Prog) {
-	if p.As == obj.ADUFFCOPY || p.As == obj.ADUFFZERO {
-		//     ADUFFxxx $offset
-		// becomes
-		//     MOVD runtime.duffxxx@GOT, R12
-		//     ADD $offset, R12
-		//     MOVD R12, CTR
-		//     BL (CTR)
-		var sym *obj.LSym
-		if p.As == obj.ADUFFZERO {
-			sym = obj.Linklookup(ctxt, "runtime.duffzero", 0)
-		} else {
-			sym = obj.Linklookup(ctxt, "runtime.duffcopy", 0)
-		}
-		offset := p.To.Offset
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_MEM
-		p.From.Name = obj.NAME_GOTREF
-		p.From.Sym = sym
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R12
-		p.To.Name = obj.NAME_NONE
-		p.To.Offset = 0
-		p.To.Sym = nil
-		p1 := obj.Appendp(ctxt, p)
-		p1.As = AADD
-		p1.From.Type = obj.TYPE_CONST
-		p1.From.Offset = offset
-		p1.To.Type = obj.TYPE_REG
-		p1.To.Reg = REG_R12
-		p2 := obj.Appendp(ctxt, p1)
-		p2.As = AMOVD
-		p2.From.Type = obj.TYPE_REG
-		p2.From.Reg = REG_R12
-		p2.To.Type = obj.TYPE_REG
-		p2.To.Reg = REG_CTR
-		p3 := obj.Appendp(ctxt, p2)
-		p3.As = obj.ACALL
-		p3.From.Type = obj.TYPE_REG
-		p3.From.Reg = REG_R12
-		p3.To.Type = obj.TYPE_REG
-		p3.To.Reg = REG_CTR
-	}
-
-	// We only care about global data: NAME_EXTERN means a global
-	// symbol in the Go sense, and p.Sym.Local is true for a few
-	// internally defined symbols.
-	if p.From.Type == obj.TYPE_ADDR && p.From.Name == obj.NAME_EXTERN && !p.From.Sym.Local() {
-		// MOVD $sym, Rx becomes MOVD sym@GOT, Rx
-		// MOVD $sym+<off>, Rx becomes MOVD sym@GOT, Rx; ADD <off>, Rx
-		if p.As != AMOVD {
-			ctxt.Diag("do not know how to handle TYPE_ADDR in %v with -dynlink", p)
-		}
-		if p.To.Type != obj.TYPE_REG {
-			ctxt.Diag("do not know how to handle LEAQ-type insn to non-register in %v with -dynlink", p)
-		}
-		p.From.Type = obj.TYPE_MEM
-		p.From.Name = obj.NAME_GOTREF
-		if p.From.Offset != 0 {
-			q := obj.Appendp(ctxt, p)
-			q.As = AADD
-			q.From.Type = obj.TYPE_CONST
-			q.From.Offset = p.From.Offset
-			q.To = p.To
-			p.From.Offset = 0
-		}
-	}
-	if p.From3 != nil && p.From3.Name == obj.NAME_EXTERN {
-		ctxt.Diag("don't know how to handle %v with -dynlink", p)
-	}
-	var source *obj.Addr
-	// MOVx sym, Ry becomes MOVD sym@GOT, REGTMP; MOVx (REGTMP), Ry
-	// MOVx Ry, sym becomes MOVD sym@GOT, REGTMP; MOVx Ry, (REGTMP)
-	// An addition may be inserted between the two MOVs if there is an offset.
-	if p.From.Name == obj.NAME_EXTERN && !p.From.Sym.Local() {
-		if p.To.Name == obj.NAME_EXTERN && !p.To.Sym.Local() {
-			ctxt.Diag("cannot handle NAME_EXTERN on both sides in %v with -dynlink", p)
-		}
-		source = &p.From
-	} else if p.To.Name == obj.NAME_EXTERN && !p.To.Sym.Local() {
-		source = &p.To
-	} else {
-		return
-	}
-	if p.As == obj.ATEXT || p.As == obj.AFUNCDATA || p.As == obj.ACALL || p.As == obj.ARET || p.As == obj.AJMP {
-		return
-	}
-	if source.Sym.Type == obj.STLSBSS {
-		return
-	}
-	if source.Type != obj.TYPE_MEM {
-		ctxt.Diag("don't know how to handle %v with -dynlink", p)
-	}
-	p1 := obj.Appendp(ctxt, p)
-	p2 := obj.Appendp(ctxt, p1)
-
-	p1.As = AMOVD
-	p1.From.Type = obj.TYPE_MEM
-	p1.From.Sym = source.Sym
-	p1.From.Name = obj.NAME_GOTREF
-	p1.To.Type = obj.TYPE_REG
-	p1.To.Reg = REGTMP
-
-	p2.As = p.As
-	p2.From = p.From
-	p2.To = p.To
-	if p.From.Name == obj.NAME_EXTERN {
-		p2.From.Reg = REGTMP
-		p2.From.Name = obj.NAME_NONE
-		p2.From.Sym = nil
-	} else if p.To.Name == obj.NAME_EXTERN {
-		p2.To.Reg = REGTMP
-		p2.To.Name = obj.NAME_NONE
-		p2.To.Sym = nil
-	} else {
-		return
-	}
-	obj.Nopout(p)
-}
-
-func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
-	// TODO(minux): add morestack short-cuts with small fixed frame-size.
-	ctxt.Cursym = cursym
-
-	if cursym.Text == nil || cursym.Text.Link == nil {
-		return
-	}
-
-	p := cursym.Text
-	textstksiz := p.To.Offset
-	if textstksiz == -8 {
-		// Compatibility hack.
-		p.From3.Offset |= obj.NOFRAME
-		textstksiz = 0
-	}
-	if textstksiz%8 != 0 {
-		ctxt.Diag("frame size %d not a multiple of 8", textstksiz)
-	}
-	if p.From3.Offset&obj.NOFRAME != 0 {
-		if textstksiz != 0 {
-			ctxt.Diag("NOFRAME functions must have a frame size of 0, not %d", textstksiz)
-		}
-	}
-
-	cursym.Args = p.To.Val.(int32)
-	cursym.Locals = int32(textstksiz)
-
-	/*
-	 * find leaf subroutines
-	 * strip NOPs
-	 * expand RET
-	 * expand BECOME pseudo
-	 */
-	if ctxt.Debugvlog != 0 {
-		ctxt.Logf("%5.2f noops\n", obj.Cputime())
-	}
-
-	var q *obj.Prog
-	var q1 *obj.Prog
-	for p := cursym.Text; p != nil; p = p.Link {
-		switch p.As {
-		/* too hard, just leave alone */
-		case obj.ATEXT:
-			q = p
-
-			p.Mark |= LABEL | LEAF | SYNC
-			if p.Link != nil {
-				p.Link.Mark |= LABEL
-			}
-
-		case ANOR:
-			q = p
-			if p.To.Type == obj.TYPE_REG {
-				if p.To.Reg == REGZERO {
-					p.Mark |= LABEL | SYNC
-				}
-			}
-
-		case ALWAR,
-			ALBAR,
-			ASTBCCC,
-			ASTWCCC,
-			AECIWX,
-			AECOWX,
-			AEIEIO,
-			AICBI,
-			AISYNC,
-			ATLBIE,
-			ATLBIEL,
-			ASLBIA,
-			ASLBIE,
-			ASLBMFEE,
-			ASLBMFEV,
-			ASLBMTE,
-			ADCBF,
-			ADCBI,
-			ADCBST,
-			ADCBT,
-			ADCBTST,
-			ADCBZ,
-			ASYNC,
-			ATLBSYNC,
-			APTESYNC,
-			ALWSYNC,
-			ATW,
-			AWORD,
-			ARFI,
-			ARFCI,
-			ARFID,
-			AHRFID:
-			q = p
-			p.Mark |= LABEL | SYNC
-			continue
-
-		case AMOVW, AMOVWZ, AMOVD:
-			q = p
-			if p.From.Reg >= REG_SPECIAL || p.To.Reg >= REG_SPECIAL {
-				p.Mark |= LABEL | SYNC
-			}
-			continue
-
-		case AFABS,
-			AFABSCC,
-			AFADD,
-			AFADDCC,
-			AFCTIW,
-			AFCTIWCC,
-			AFCTIWZ,
-			AFCTIWZCC,
-			AFDIV,
-			AFDIVCC,
-			AFMADD,
-			AFMADDCC,
-			AFMOVD,
-			AFMOVDU,
-			/* case AFMOVDS: */
-			AFMOVS,
-			AFMOVSU,
-
-			/* case AFMOVSD: */
-			AFMSUB,
-			AFMSUBCC,
-			AFMUL,
-			AFMULCC,
-			AFNABS,
-			AFNABSCC,
-			AFNEG,
-			AFNEGCC,
-			AFNMADD,
-			AFNMADDCC,
-			AFNMSUB,
-			AFNMSUBCC,
-			AFRSP,
-			AFRSPCC,
-			AFSUB,
-			AFSUBCC:
-			q = p
-
-			p.Mark |= FLOAT
-			continue
-
-		case ABL,
-			ABCL,
-			obj.ADUFFZERO,
-			obj.ADUFFCOPY:
-			cursym.Text.Mark &^= LEAF
-			fallthrough
-
-		case ABC,
-			ABEQ,
-			ABGE,
-			ABGT,
-			ABLE,
-			ABLT,
-			ABNE,
-			ABR,
-			ABVC,
-			ABVS:
-			p.Mark |= BRANCH
-			q = p
-			q1 = p.Pcond
-			if q1 != nil {
-				for q1.As == obj.ANOP {
-					q1 = q1.Link
-					p.Pcond = q1
-				}
-
-				if q1.Mark&LEAF == 0 {
-					q1.Mark |= LABEL
-				}
-			} else {
-				p.Mark |= LABEL
-			}
-			q1 = p.Link
-			if q1 != nil {
-				q1.Mark |= LABEL
-			}
-			continue
-
-		case AFCMPO, AFCMPU:
-			q = p
-			p.Mark |= FCMP | FLOAT
-			continue
-
-		case obj.ARET:
-			q = p
-			if p.Link != nil {
-				p.Link.Mark |= LABEL
-			}
-			continue
-
-		case obj.ANOP:
-			q1 = p.Link
-			q.Link = q1 /* q is non-nop */
-			q1.Mark |= p.Mark
-			continue
-
-		default:
-			q = p
-			continue
-		}
-	}
-
-	autosize := int32(0)
-	var p1 *obj.Prog
-	var p2 *obj.Prog
-	for p := cursym.Text; p != nil; p = p.Link {
-		o := p.As
-		switch o {
-		case obj.ATEXT:
-			autosize = int32(textstksiz)
-
-			if p.Mark&LEAF != 0 && autosize == 0 {
-				// A leaf function with no locals has no frame.
-				p.From3.Offset |= obj.NOFRAME
-			}
-
-			if p.From3.Offset&obj.NOFRAME == 0 {
-				// If there is a stack frame at all, it includes
-				// space to save the LR.
-				autosize += int32(ctxt.FixedFrameSize())
-			}
-
-			if p.Mark&LEAF != 0 && autosize < obj.StackSmall {
-				// A leaf function with a small stack can be marked
-				// NOSPLIT, avoiding a stack check.
-				p.From3.Offset |= obj.NOSPLIT
-			}
-
-			p.To.Offset = int64(autosize)
-
-			q = p
-
-			if ctxt.Flag_shared && cursym.Name != "runtime.duffzero" && cursym.Name != "runtime.duffcopy" && cursym.Name != "runtime.stackBarrier" {
-				// When compiling Go into PIC, all functions must start
-				// with instructions to load the TOC pointer into r2:
-				//
-				//	addis r2, r12, .TOC.-func@ha
-				//	addi r2, r2, .TOC.-func@l+4
-				//
-				// We could probably skip this prologue in some situations
-				// but it's a bit subtle. However, it is both safe and
-				// necessary to leave the prologue off duffzero and
-				// duffcopy as we rely on being able to jump to a specific
-				// instruction offset for them, and stackBarrier is only
-				// ever called from an overwritten LR-save slot on the
-				// stack (when r12 will not be remotely the right thing)
-				// but fortunately does not access global data.
-				//
-				// These are AWORDS because there is no (afaict) way to
-				// generate the addis instruction except as part of the
-				// load of a large constant, and in that case there is no
-				// way to use r12 as the source.
-				q = obj.Appendp(ctxt, q)
-				q.As = AWORD
-				q.Lineno = p.Lineno
-				q.From.Type = obj.TYPE_CONST
-				q.From.Offset = 0x3c4c0000
-				q = obj.Appendp(ctxt, q)
-				q.As = AWORD
-				q.Lineno = p.Lineno
-				q.From.Type = obj.TYPE_CONST
-				q.From.Offset = 0x38420000
-				rel := obj.Addrel(ctxt.Cursym)
-				rel.Off = 0
-				rel.Siz = 8
-				rel.Sym = obj.Linklookup(ctxt, ".TOC.", 0)
-				rel.Type = obj.R_ADDRPOWER_PCREL
-			}
-
-			if cursym.Text.From3.Offset&obj.NOSPLIT == 0 {
-				q = stacksplit(ctxt, q, autosize) // emit split check
-			}
-
-			if autosize != 0 {
-				// Make sure to save link register for non-empty frame, even if
-				// it is a leaf function, so that traceback works.
-				if cursym.Text.Mark&LEAF == 0 && autosize >= -BIG && autosize <= BIG {
-					// Use MOVDU to adjust R1 when saving R31, if autosize is small.
-					q = obj.Appendp(ctxt, q)
-					q.As = AMOVD
-					q.Lineno = p.Lineno
-					q.From.Type = obj.TYPE_REG
-					q.From.Reg = REG_LR
-					q.To.Type = obj.TYPE_REG
-					q.To.Reg = REGTMP
-
-					q = obj.Appendp(ctxt, q)
-					q.As = AMOVDU
-					q.Lineno = p.Lineno
-					q.From.Type = obj.TYPE_REG
-					q.From.Reg = REGTMP
-					q.To.Type = obj.TYPE_MEM
-					q.To.Offset = int64(-autosize)
-					q.To.Reg = REGSP
-					q.Spadj = int32(autosize)
-				} else {
-					// Frame size is too large for a MOVDU instruction.
-					// Store link register before decrementing SP, so if a signal comes
-					// during the execution of the function prologue, the traceback
-					// code will not see a half-updated stack frame.
-					q = obj.Appendp(ctxt, q)
-					q.As = AMOVD
-					q.Lineno = p.Lineno
-					q.From.Type = obj.TYPE_REG
-					q.From.Reg = REG_LR
-					q.To.Type = obj.TYPE_REG
-					q.To.Reg = REG_R29 // REGTMP may be used to synthesize large offset in the next instruction
-
-					q = obj.Appendp(ctxt, q)
-					q.As = AMOVD
-					q.Lineno = p.Lineno
-					q.From.Type = obj.TYPE_REG
-					q.From.Reg = REG_R29
-					q.To.Type = obj.TYPE_MEM
-					q.To.Offset = int64(-autosize)
-					q.To.Reg = REGSP
-
-					q = obj.Appendp(ctxt, q)
-					q.As = AADD
-					q.Lineno = p.Lineno
-					q.From.Type = obj.TYPE_CONST
-					q.From.Offset = int64(-autosize)
-					q.To.Type = obj.TYPE_REG
-					q.To.Reg = REGSP
-					q.Spadj = +autosize
-				}
-			} else if cursym.Text.Mark&LEAF == 0 {
-				// A very few functions that do not return to their caller
-				// (e.g. gogo) are not identified as leaves but still have
-				// no frame.
-				cursym.Text.Mark |= LEAF
-			}
-
-			if cursym.Text.Mark&LEAF != 0 {
-				cursym.Set(obj.AttrLeaf, true)
-				break
-			}
-
-			if ctxt.Flag_shared {
-				q = obj.Appendp(ctxt, q)
-				q.As = AMOVD
-				q.Lineno = p.Lineno
-				q.From.Type = obj.TYPE_REG
-				q.From.Reg = REG_R2
-				q.To.Type = obj.TYPE_MEM
-				q.To.Reg = REGSP
-				q.To.Offset = 24
-			}
-
-			if cursym.Text.From3.Offset&obj.WRAPPER != 0 {
-				// if(g->panic != nil && g->panic->argp == FP) g->panic->argp = bottom-of-frame
-				//
-				//	MOVD g_panic(g), R3
-				//	CMP R0, R3
-				//	BEQ end
-				//	MOVD panic_argp(R3), R4
-				//	ADD $(autosize+8), R1, R5
-				//	CMP R4, R5
-				//	BNE end
-				//	ADD $8, R1, R6
-				//	MOVD R6, panic_argp(R3)
-				// end:
-				//	NOP
-				//
-				// The NOP is needed to give the jumps somewhere to land.
-				// It is a liblink NOP, not a ppc64 NOP: it encodes to 0 instruction bytes.
-
-				q = obj.Appendp(ctxt, q)
-
-				q.As = AMOVD
-				q.From.Type = obj.TYPE_MEM
-				q.From.Reg = REGG
-				q.From.Offset = 4 * int64(ctxt.Arch.PtrSize) // G.panic
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R3
-
-				q = obj.Appendp(ctxt, q)
-				q.As = ACMP
-				q.From.Type = obj.TYPE_REG
-				q.From.Reg = REG_R0
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R3
-
-				q = obj.Appendp(ctxt, q)
-				q.As = ABEQ
-				q.To.Type = obj.TYPE_BRANCH
-				p1 = q
-
-				q = obj.Appendp(ctxt, q)
-				q.As = AMOVD
-				q.From.Type = obj.TYPE_MEM
-				q.From.Reg = REG_R3
-				q.From.Offset = 0 // Panic.argp
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R4
-
-				q = obj.Appendp(ctxt, q)
-				q.As = AADD
-				q.From.Type = obj.TYPE_CONST
-				q.From.Offset = int64(autosize) + ctxt.FixedFrameSize()
-				q.Reg = REGSP
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R5
-
-				q = obj.Appendp(ctxt, q)
-				q.As = ACMP
-				q.From.Type = obj.TYPE_REG
-				q.From.Reg = REG_R4
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R5
-
-				q = obj.Appendp(ctxt, q)
-				q.As = ABNE
-				q.To.Type = obj.TYPE_BRANCH
-				p2 = q
-
-				q = obj.Appendp(ctxt, q)
-				q.As = AADD
-				q.From.Type = obj.TYPE_CONST
-				q.From.Offset = ctxt.FixedFrameSize()
-				q.Reg = REGSP
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_R6
-
-				q = obj.Appendp(ctxt, q)
-				q.As = AMOVD
-				q.From.Type = obj.TYPE_REG
-				q.From.Reg = REG_R6
-				q.To.Type = obj.TYPE_MEM
-				q.To.Reg = REG_R3
-				q.To.Offset = 0 // Panic.argp
-
-				q = obj.Appendp(ctxt, q)
-
-				q.As = obj.ANOP
-				p1.Pcond = q
-				p2.Pcond = q
-			}
-
-		case obj.ARET:
-			if p.From.Type == obj.TYPE_CONST {
-				ctxt.Diag("using BECOME (%v) is not supported!", p)
-				break
-			}
-
-			retTarget := p.To.Sym
-
-			if cursym.Text.Mark&LEAF != 0 {
-				if autosize == 0 {
-					p.As = ABR
-					p.From = obj.Addr{}
-					if retTarget == nil {
-						p.To.Type = obj.TYPE_REG
-						p.To.Reg = REG_LR
-					} else {
-						p.To.Type = obj.TYPE_BRANCH
-						p.To.Sym = retTarget
-					}
-					p.Mark |= BRANCH
-					break
-				}
-
-				p.As = AADD
-				p.From.Type = obj.TYPE_CONST
-				p.From.Offset = int64(autosize)
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REGSP
-				p.Spadj = -autosize
-
-				q = ctxt.NewProg()
-				q.As = ABR
-				q.Lineno = p.Lineno
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REG_LR
-				q.Mark |= BRANCH
-				q.Spadj = +autosize
-
-				q.Link = p.Link
-				p.Link = q
-				break
-			}
-
-			p.As = AMOVD
-			p.From.Type = obj.TYPE_MEM
-			p.From.Offset = 0
-			p.From.Reg = REGSP
-			p.To.Type = obj.TYPE_REG
-			p.To.Reg = REGTMP
-
-			q = ctxt.NewProg()
-			q.As = AMOVD
-			q.Lineno = p.Lineno
-			q.From.Type = obj.TYPE_REG
-			q.From.Reg = REGTMP
-			q.To.Type = obj.TYPE_REG
-			q.To.Reg = REG_LR
-
-			q.Link = p.Link
-			p.Link = q
-			p = q
-
-			if false {
-				// Debug bad returns
-				q = ctxt.NewProg()
-
-				q.As = AMOVD
-				q.Lineno = p.Lineno
-				q.From.Type = obj.TYPE_MEM
-				q.From.Offset = 0
-				q.From.Reg = REGTMP
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REGTMP
-
-				q.Link = p.Link
-				p.Link = q
-				p = q
-			}
-
-			if autosize != 0 {
-				q = ctxt.NewProg()
-				q.As = AADD
-				q.Lineno = p.Lineno
-				q.From.Type = obj.TYPE_CONST
-				q.From.Offset = int64(autosize)
-				q.To.Type = obj.TYPE_REG
-				q.To.Reg = REGSP
-				q.Spadj = -autosize
-
-				q.Link = p.Link
-				p.Link = q
-			}
-
-			q1 = ctxt.NewProg()
-			q1.As = ABR
-			q1.Lineno = p.Lineno
-			if retTarget == nil {
-				q1.To.Type = obj.TYPE_REG
-				q1.To.Reg = REG_LR
-			} else {
-				q1.To.Type = obj.TYPE_BRANCH
-				q1.To.Sym = retTarget
-			}
-			q1.Mark |= BRANCH
-			q1.Spadj = +autosize
-
-			q1.Link = q.Link
-			q.Link = q1
-		case AADD:
-			if p.To.Type == obj.TYPE_REG && p.To.Reg == REGSP && p.From.Type == obj.TYPE_CONST {
-				p.Spadj = int32(-p.From.Offset)
-			}
-		}
-	}
-}
-
-/*
-// instruction scheduling
-	if(debug['Q'] == 0)
-		return;
-
-	curtext = nil;
-	q = nil;	// p - 1
-	q1 = firstp;	// top of block
-	o = 0;		// count of instructions
-	for(p = firstp; p != nil; p = p1) {
-		p1 = p->link;
-		o++;
-		if(p->mark & NOSCHED){
-			if(q1 != p){
-				sched(q1, q);
-			}
-			for(; p != nil; p = p->link){
-				if(!(p->mark & NOSCHED))
-					break;
-				q = p;
-			}
-			p1 = p;
-			q1 = p;
-			o = 0;
-			continue;
-		}
-		if(p->mark & (LABEL|SYNC)) {
-			if(q1 != p)
-				sched(q1, q);
-			q1 = p;
-			o = 1;
-		}
-		if(p->mark & (BRANCH|SYNC)) {
-			sched(q1, p);
-			q1 = p1;
-			o = 0;
-		}
-		if(o >= NSCHED) {
-			sched(q1, p);
-			q1 = p1;
-			o = 0;
-		}
-		q = p;
-	}
-*/
-func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
-	p0 := p // save entry point, but skipping the two instructions setting R2 in shared mode
-
-	// MOVD	g_stackguard(g), R3
-	p = obj.Appendp(ctxt, p)
-
-	p.As = AMOVD
-	p.From.Type = obj.TYPE_MEM
-	p.From.Reg = REGG
-	p.From.Offset = 2 * int64(ctxt.Arch.PtrSize) // G.stackguard0
-	if ctxt.Cursym.CFunc() {
-		p.From.Offset = 3 * int64(ctxt.Arch.PtrSize) // G.stackguard1
-	}
-	p.To.Type = obj.TYPE_REG
-	p.To.Reg = REG_R3
-
-	var q *obj.Prog
-	if framesize <= obj.StackSmall {
-		// small stack: SP < stackguard
-		//	CMP	stackguard, SP
-		p = obj.Appendp(ctxt, p)
-
-		p.As = ACMPU
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R3
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REGSP
-	} else if framesize <= obj.StackBig {
-		// large stack: SP-framesize < stackguard-StackSmall
-		//	ADD $-framesize, SP, R4
-		//	CMP stackguard, R4
-		p = obj.Appendp(ctxt, p)
-
-		p.As = AADD
-		p.From.Type = obj.TYPE_CONST
-		p.From.Offset = int64(-framesize)
-		p.Reg = REGSP
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R4
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ACMPU
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R3
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R4
-	} else {
-		// Such a large stack we need to protect against wraparound.
-		// If SP is close to zero:
-		//	SP-stackguard+StackGuard <= framesize + (StackGuard-StackSmall)
-		// The +StackGuard on both sides is required to keep the left side positive:
-		// SP is allowed to be slightly below stackguard. See stack.h.
-		//
-		// Preemption sets stackguard to StackPreempt, a very large value.
-		// That breaks the math above, so we have to check for that explicitly.
-		//	// stackguard is R3
-		//	CMP	R3, $StackPreempt
-		//	BEQ	label-of-call-to-morestack
-		//	ADD	$StackGuard, SP, R4
-		//	SUB	R3, R4
-		//	MOVD	$(framesize+(StackGuard-StackSmall)), R31
-		//	CMPU	R31, R4
-		p = obj.Appendp(ctxt, p)
-
-		p.As = ACMP
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R3
-		p.To.Type = obj.TYPE_CONST
-		p.To.Offset = obj.StackPreempt
-
-		p = obj.Appendp(ctxt, p)
-		q = p
-		p.As = ABEQ
-		p.To.Type = obj.TYPE_BRANCH
-
-		p = obj.Appendp(ctxt, p)
-		p.As = AADD
-		p.From.Type = obj.TYPE_CONST
-		p.From.Offset = obj.StackGuard
-		p.Reg = REGSP
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R4
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ASUB
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R3
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R4
-
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_CONST
-		p.From.Offset = int64(framesize) + obj.StackGuard - obj.StackSmall
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REGTMP
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ACMPU
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REGTMP
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R4
-	}
-
-	// q1: BLT	done
-	p = obj.Appendp(ctxt, p)
-	q1 := p
-
-	p.As = ABLT
-	p.To.Type = obj.TYPE_BRANCH
-
-	// MOVD	LR, R5
-	p = obj.Appendp(ctxt, p)
-
-	p.As = AMOVD
-	p.From.Type = obj.TYPE_REG
-	p.From.Reg = REG_LR
-	p.To.Type = obj.TYPE_REG
-	p.To.Reg = REG_R5
-	if q != nil {
-		q.Pcond = p
-	}
-
-	var morestacksym *obj.LSym
-	if ctxt.Cursym.CFunc() {
-		morestacksym = obj.Linklookup(ctxt, "runtime.morestackc", 0)
-	} else if ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0 {
-		morestacksym = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
-	} else {
-		morestacksym = obj.Linklookup(ctxt, "runtime.morestack", 0)
-	}
-
-	if ctxt.Flag_shared {
-		// In PPC64 PIC code, R2 is used as TOC pointer derived from R12
-		// which is the address of function entry point when entering
-		// the function. We need to preserve R2 across call to morestack.
-		// Fortunately, in shared mode, 8(SP) and 16(SP) are reserved in
-		// the caller's frame, but not used (0(SP) is caller's saved LR,
-		// 24(SP) is caller's saved R2). Use 8(SP) to save this function's R2.
-
-		// MOVD R12, 8(SP)
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R2
-		p.To.Type = obj.TYPE_MEM
-		p.To.Reg = REGSP
-		p.To.Offset = 8
-	}
-
-	if ctxt.Flag_dynlink {
-		// Avoid calling morestack via a PLT when dynamically linking. The
-		// PLT stubs generated by the system linker on ppc64le when "std r2,
-		// 24(r1)" to save the TOC pointer in their callers stack
-		// frame. Unfortunately (and necessarily) morestack is called before
-		// the function that calls it sets up its frame and so the PLT ends
-		// up smashing the saved TOC pointer for its caller's caller.
-		//
-		// According to the ABI documentation there is a mechanism to avoid
-		// the TOC save that the PLT stub does (put a R_PPC64_TOCSAVE
-		// relocation on the nop after the call to morestack) but at the time
-		// of writing it is not supported at all by gold and my attempt to
-		// use it with ld.bfd caused an internal linker error. So this hack
-		// seems preferable.
-
-		// MOVD $runtime.morestack(SB), R12
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_MEM
-		p.From.Sym = morestacksym
-		p.From.Name = obj.NAME_GOTREF
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R12
-
-		// MOVD R12, CTR
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R12
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_CTR
-
-		// BL CTR
-		p = obj.Appendp(ctxt, p)
-		p.As = obj.ACALL
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R12
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_CTR
-	} else {
-		// BL	runtime.morestack(SB)
-		p = obj.Appendp(ctxt, p)
-
-		p.As = ABL
-		p.To.Type = obj.TYPE_BRANCH
-		p.To.Sym = morestacksym
-	}
-
-	if ctxt.Flag_shared {
-		// MOVD 8(SP), R2
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVD
-		p.From.Type = obj.TYPE_MEM
-		p.From.Reg = REGSP
-		p.From.Offset = 8
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R2
-	}
-
-	// BR	start
-	p = obj.Appendp(ctxt, p)
-	p.As = ABR
-	p.To.Type = obj.TYPE_BRANCH
-	p.Pcond = p0.Link
-
-	// placeholder for q1's jump target
-	p = obj.Appendp(ctxt, p)
-
-	p.As = obj.ANOP // zero-width place holder
-	q1.Pcond = p
-
-	return p
-}
-
-func follow(ctxt *obj.Link, s *obj.LSym) {
-	ctxt.Cursym = s
-
-	firstp := ctxt.NewProg()
-	lastp := firstp
-	xfol(ctxt, s.Text, &lastp)
-	lastp.Link = nil
-	s.Text = firstp.Link
-}
-
-func relinv(a obj.As) obj.As {
-	switch a {
-	case ABEQ:
-		return ABNE
-	case ABNE:
-		return ABEQ
-
-	case ABGE:
-		return ABLT
-	case ABLT:
-		return ABGE
-
-	case ABGT:
-		return ABLE
-	case ABLE:
-		return ABGT
-
-	case ABVC:
-		return ABVS
-	case ABVS:
-		return ABVC
-	}
-
-	return 0
-}
-
-func xfol(ctxt *obj.Link, p *obj.Prog, last **obj.Prog) {
-	var q *obj.Prog
-	var r *obj.Prog
-	var b obj.As
-	var i int
-
-loop:
-	if p == nil {
-		return
-	}
-	a := p.As
-	if a == ABR {
-		q = p.Pcond
-		if (p.Mark&NOSCHED != 0) || q != nil && (q.Mark&NOSCHED != 0) {
-			p.Mark |= FOLL
-			(*last).Link = p
-			*last = p
-			p = p.Link
-			xfol(ctxt, p, last)
-			p = q
-			if p != nil && p.Mark&FOLL == 0 {
-				goto loop
-			}
-			return
-		}
-
-		if q != nil {
-			p.Mark |= FOLL
-			p = q
-			if p.Mark&FOLL == 0 {
-				goto loop
-			}
-		}
-	}
-
-	if p.Mark&FOLL != 0 {
-		i = 0
-		q = p
-		for ; i < 4; i, q = i+1, q.Link {
-			if q == *last || (q.Mark&NOSCHED != 0) {
-				break
-			}
-			b = 0 /* set */
-			a = q.As
-			if a == obj.ANOP {
-				i--
-				continue
-			}
-
-			if a == ABR || a == obj.ARET || a == ARFI || a == ARFCI || a == ARFID || a == AHRFID {
-				goto copy
-			}
-			if q.Pcond == nil || (q.Pcond.Mark&FOLL != 0) {
-				continue
-			}
-			b = relinv(a)
-			if b == 0 {
-				continue
-			}
-
-		copy:
-			for {
-				r = ctxt.NewProg()
-				*r = *p
-				if r.Mark&FOLL == 0 {
-					fmt.Printf("can't happen 1\n")
-				}
-				r.Mark |= FOLL
-				if p != q {
-					p = p.Link
-					(*last).Link = r
-					*last = r
-					continue
-				}
-
-				(*last).Link = r
-				*last = r
-				if a == ABR || a == obj.ARET || a == ARFI || a == ARFCI || a == ARFID || a == AHRFID {
-					return
-				}
-				r.As = b
-				r.Pcond = p.Link
-				r.Link = p.Pcond
-				if r.Link.Mark&FOLL == 0 {
-					xfol(ctxt, r.Link, last)
-				}
-				if r.Pcond.Mark&FOLL == 0 {
-					fmt.Printf("can't happen 2\n")
-				}
-				return
-			}
-		}
-
-		a = ABR
-		q = ctxt.NewProg()
-		q.As = a
-		q.Lineno = p.Lineno
-		q.To.Type = obj.TYPE_BRANCH
-		q.To.Offset = p.Pc
-		q.Pcond = p
-		p = q
-	}
-
-	p.Mark |= FOLL
-	(*last).Link = p
-	*last = p
-	if a == ABR || a == obj.ARET || a == ARFI || a == ARFCI || a == ARFID || a == AHRFID {
-		if p.Mark&NOSCHED != 0 {
-			p = p.Link
-			goto loop
-		}
-
-		return
-	}
-
-	if p.Pcond != nil {
-		if a != ABL && p.Link != nil {
-			xfol(ctxt, p.Link, last)
-			p = p.Pcond
-			if p == nil || (p.Mark&FOLL != 0) {
-				return
-			}
-			goto loop
-		}
-	}
-
-	p = p.Link
-	goto loop
-}
-
-var Linkppc64 = obj.LinkArch{
-	Arch:       sys.ArchPPC64,
-	Preprocess: preprocess,
-	Assemble:   span9,
-	Follow:     follow,
-	Progedit:   progedit,
-}
-
-var Linkppc64le = obj.LinkArch{
-	Arch:       sys.ArchPPC64LE,
-	Preprocess: preprocess,
-	Assemble:   span9,
-	Follow:     follow,
-	Progedit:   progedit,
-}