}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

// elfIsLittleEndian detects if the ELF file is little endian.
func elfIsLittleEndian(fn string) bool {
	// read the ELF file header to determine the endianness without using the
	// debug/elf package.
	file, err := os.Open(fn)
	if err != nil {
		fatalf("failed to open file to determine endianness: %v", err)
	}

	rs := decodeRelocSym(ctxt.loader, s, &relocs, 2*int32(ctxt.Arch.PtrSize)+8+1*int32(ctxt.Arch.PtrSize))
	return ctxt.loader.Data(rs)
}

// Find the elf.Section of a given shared library that contains a given address.
func findShlibSection(ctxt *Link, path string, addr uint64) *elf.Section {
	for _, shlib := range ctxt.Shlibs {
		if shlib.Path == path {
			for _, sect := range shlib.File.Sections[1:] { // skip the NULL section

				t.Fatal(err)
			}
			for _, s := range xf.Symbols {
				switch s.Name {
				case c1:
					found1 = true
				case c2:
					found2 = true
				}
			}
		default: // ELF
			ef, err := elf.NewFile(obj)
			if err != nil {
				t.Fatal(err)
			}
			syms, err := ef.Symbols()
			if err != nil {
				t.Fatal(err)
			}
			for _, s := range syms {
				switch s.Name {
				case c1:

.file "gcc_riscv64.S"

/*
 * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
 *
 * Calling into the gc tool chain, where all registers are caller save.
 * Called from standard RISCV ELF psABI, where x8-x9, x18-x27, f8-f9 and
 * f18-f27 are callee-save, so they must be saved explicitly, along with
 * x1 (LR).
 */
.globl crosscall1
crosscall1:
	sd	x1, -200(sp)
	addi	sp, sp, -200
	sd	x8, 8(sp)

// which does not respect GOAMD64, so we skip the test if boringcrypto is enabled.
//go:build !boringcrypto

package amd64_test

import (
	"bufio"
	"debug/elf"
	"debug/macho"
	"errors"
	"fmt"
	"go/build"
	"internal/testenv"
	"io"
	"math"
	"math/bits"
	"os"
	"os/exec"
	"regexp"
	"runtime"
	"strconv"
	"strings"
	"testing"
)

export CGO_ENABLED=0

# Modify the support code crypto/mem.c (outside the FIPS module)
# to not try to use weak symbols, because they don't work with some
# Go toolchain / clang toolchain combinations.
perl -p -i -e 's/defined.*ELF.*defined.*GNUC.*/$0 \&\& !defined(GOBORING)/' boringssl/crypto/mem.c

# Verbatim instructions from BoringCrypto build docs.
printf "set(CMAKE_C_COMPILER \"clang\")\nset(CMAKE_CXX_COMPILER \"clang++\")\n" >${HOME}/toolchain

A linker command line flag `-checklinkname=0` can be used to disable
this check, for debugging and experimenting purposes.

<!-- CL 473495 -->
When building a dynamically linked ELF binary (including PIE binary), the

	e_phoff     uint32           /* Program header table file offset */
	e_shoff     uint32           /* Section header table file offset */
	e_flags     uint32           /* Processor-specific flags */
	e_ehsize    uint16           /* ELF header size in bytes */
	e_phentsize uint16           /* Program header table entry size */
	e_phnum     uint16           /* Program header table entry count */
	e_shentsize uint16           /* Section header table entry size */

	e_phoff     uint64           /* Program header table file offset */
	e_shoff     uint64           /* Section header table file offset */
	e_flags     uint32           /* Processor-specific flags */
	e_ehsize    uint16           /* ELF header size in bytes */
	e_phentsize uint16           /* Program header table entry size */
	e_phnum     uint16           /* Program header table entry count */
	e_shentsize uint16           /* Section header table entry size */

  if [[ "${extension}" == "deb" ]]; then
    arch="$(dpkg-deb --info "${FILE}" | grep Arch | cut -d: -f 2 | cut -c 2-)"
    echo "${arch}"
    return 0
  fi
  FILE_INFO=$(file "${FILE}" || true)
  if [[ ${FILE_INFO} == *"ELF 64-bit LSB"* ]]; then
    case ${FILE_INFO} in
      *x86-64*)
        echo "amd64"
        return 0
        ;;
      *aarch64*)
        echo "arm64"
        return 0
        ;;
    esac
  fi
}