FREGMAX = REG_F26 /* last register variable for 9g only */
	FREGEXT = REG_F26 /* first external register */
)

// OpenPOWER ABI for Linux Supplement Power Architecture 64-Bit ELF V2 ABI
// https://openpowerfoundation.org/?resource_lib=64-bit-elf-v2-abi-specification-power-architecture
var PPC64DWARFRegisters = map[int16]int16{}

func init() {
	// f assigns dwarfregister[from:to] = (base):(to-from+base)

pkg database/sql, type NullByte struct, Valid bool
pkg database/sql, type NullInt16 struct
pkg database/sql, type NullInt16 struct, Int16 int16
pkg database/sql, type NullInt16 struct, Valid bool
pkg debug/elf, const SHT_MIPS_ABIFLAGS = 1879048234
pkg debug/elf, const SHT_MIPS_ABIFLAGS SectionType
pkg encoding/csv, method (*Reader) FieldPos(int) (int, int)
pkg go/build, type Context struct, ToolTags []string
pkg go/parser, const SkipObjectResolution = 64

they need to be linked into the final binary, along with the libraries
they might depend on (in the case of puts, stdio). cmd/link has been
extended to understand basic ELF files, but it does not understand ELF
in the full complexity that modern C libraries embrace, so it cannot
in general generate direct references to the system libraries.

Instead, the build process generates an object file using dynamic

	JEQ	nog1
	CMPQ	R9, $0    // g
	JEQ	nog1
	LEAQ	m_tls(R13), R8
#ifdef GOOS_android
	// Android stores the TLS offset in runtime·tls_g.
	SUBQ	runtime·tls_g(SB), R8
#else
	ADDQ	$8, R8	// ELF wants to use -8(FS)
#endif
	ORQ 	$0x00080000, DI //add flag CLONE_SETTLS(0x00080000) to call clone
nog1:
	MOVL	$SYS_clone, AX
	SYSCALL

	// In parent, return.
	CMPQ	AX, $0
	JEQ	3(PC)

	"cmd/internal/bio"
	"cmd/internal/objabi"
	"cmd/internal/sys"
	"cmd/link/internal/loader"
	"cmd/link/internal/sym"
	"encoding/binary"
	"fmt"
)

/*
Derived from Plan 9 from User Space's src/libmach/elf.h, elf.c
https://github.com/9fans/plan9port/tree/master/src/libmach/

	Copyright © 2004 Russ Cox.
	Portions Copyright © 2008-2010 Google Inc.
	Portions Copyright © 2010 The Go Authors.

// 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.

package elf

import (
	"io"
	"path"
	"reflect"
	"testing"
)

// TODO: remove duplicate code
func TestSymbols(t *testing.T) {
	do := func(file string, ts []Symbol, getfunc func(*File) ([]Symbol, error)) {
		var f *File
		var err error
		if path.Ext(file) == ".gz" {

// at shlibpath. For the native toolchain this list is stored, newline separated, in
// an ELF note with name "Go\x00\x00" and type 1. For GCCGO it is extracted from the
// .go_export section.
func readpkglist(shlibpath string) (pkgs []*load.Package) {
	var stk load.ImportStack
	if cfg.BuildToolchainName == "gccgo" {
		f, err := elf.Open(shlibpath)
		if err != nil {
			base.Fatal(fmt.Errorf("failed to open shared library: %v", err))

	"cmd/internal/src",
	"cmd/internal/sys",
	"cmd/internal/telemetry",
	"cmd/link",
	"cmd/link/internal/...",
	"compress/flate",
	"compress/zlib",
	"container/heap",
	"debug/dwarf",
	"debug/elf",
	"debug/macho",
	"debug/pe",
	"go/build/constraint",
	"go/constant",
	"go/version",
	"internal/abi",
	"internal/coverage",
	"cmd/internal/cov/covcmd",
	"internal/bisect",
	"internal/buildcfg",

	REG_FT8  = REG_F28
	REG_FT9  = REG_F29
	REG_FT10 = REG_F30
	REG_FT11 = REG_F31

	// Names generated by the SSA compiler.
	REGSP = REG_SP
	REGG  = REG_G
)

// https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-dwarf.adoc#dwarf-register-numbers
var RISCV64DWARFRegisters = map[int16]int16{
	// Integer Registers.
	REG_X0:  0,
	REG_X1:  1,
	REG_X2:  2,
	REG_X3:  3,
	REG_X4:  4,
	REG_X5:  5,

	MOVQ	old+8(FP), SI		// arg 2 - oss
	MOVQ	$SYS___sigaltstack14, AX
	SYSCALL
	JCC	2(PC)
	MOVL	$0xf1, 0xf1		// crash
	RET

// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$8
	// adjust for ELF: wants to use -8(FS) for g
	ADDQ	$8, DI			// arg 1 - ptr
	MOVQ	$SYS__lwp_setprivate, AX
	SYSCALL
	JCC	2(PC)
	MOVL	$0xf1, 0xf1		// crash
	RET

TEXT runtime·sysctl(SB),NOSPLIT,$0