// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package asm

import (
	"fmt"
	"internal/abi"
	"strconv"
	"strings"
	"text/scanner"

	"cmd/asm/internal/arch"
	"cmd/asm/internal/flags"
	"cmd/asm/internal/lex"
	"cmd/internal/obj"
	"cmd/internal/obj/arm64"
	"cmd/internal/obj/ppc64"
	"cmd/internal/obj/riscv"
	"cmd/internal/obj/x86"

	"Path":  "/doc/asm"
}-->

<h2 id="introduction">A Quick Guide to Go's Assembler</h2>

<p>
This document is a quick outline of the unusual form of assembly language used by the <code>gc</code> Go compiler.
The document is not comprehensive.
</p>

<p>
The assembler is based on the input style of the Plan 9 assemblers, which is documented in detail
<a href="https://9p.io/sys/doc/asm.html">elsewhere</a>.

import (
	"bufio"
	"flag"
	"fmt"
	"internal/buildcfg"
	"log"
	"os"

	"cmd/asm/internal/arch"
	"cmd/asm/internal/asm"
	"cmd/asm/internal/flags"
	"cmd/asm/internal/lex"

	"cmd/internal/bio"
	"cmd/internal/obj"
	"cmd/internal/objabi"
	"cmd/internal/telemetry/counter"
)

func main() {
	log.SetFlags(0)
	log.SetPrefix("asm: ")
	counter.Open()

	buildcfg.Check()
	GOARCH := buildcfg.GOARCH

			<cutdirsmapper dirs="1" />
		</unzip>
	</target>

	<target name="remove.jars" if="with.fess">
		<delete>
			<fileset dir="${modules.dir}">
				<include name="lang-expression/asm-*" />
				<include name="lang-painless/asm-*" />
				<include name="reindex/commons-codec-*" />
				<include name="reindex/commons-logging-*" />
				<include name="reindex/httpclient5-*" />
				<include name="reindex/httpcore5-*" />

## Tools {#tools}

<!-- go.dev/issue/77177 -->

Response file (`@file`) parsing is now supported for the `compile`, `link`, `asm`, `cgo`, `cover`, and `pack` tools.
The response file contains whitespace-separated arguments with support for single-quoted and double-quoted strings, escape sequences, and backslash-newline line continuation.
The format is compatible with GCC's response file implementation to ensure interoperability with existing build systems.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package asm

import (
	"bufio"
	"bytes"
	"fmt"
	"internal/buildcfg"
	"os"
	"path/filepath"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"testing"

	"cmd/asm/internal/lex"
	"cmd/internal/obj"
)

// An end-to-end test for the assembler: Do we print what we parse?

		</dependency>
		<dependency>
			<groupId>org.ow2.asm</groupId>
			<artifactId>asm</artifactId>
			<version>${asm.version}</version>
		</dependency>
		<dependency>
			<groupId>org.ow2.asm</groupId>
			<artifactId>asm-commons</artifactId>
			<version>${asm.version}</version>
		</dependency>
		<dependency>
			<groupId>org.ow2.asm</groupId>
			<artifactId>asm-util</artifactId>
			<version>${asm.version}</version>

			filepath.Join(cwd, "lib", "time", "zoneinfo.zip"),
		)
		if err != nil {
			return "", err
		}
		// Copy src/runtime/textflag.h for (at least) Test386EndToEnd in
		// cmd/asm/internal/asm.
		runtimePath := filepath.Join(dstbase, "src", "runtime")
		if err := os.MkdirAll(runtimePath, 0755); err != nil {
			return "", err
		}
		err = cp(
			filepath.Join(runtimePath, "textflag.h"),

// license that can be found in the LICENSE file.

package lex

import (
	"fmt"
	"os"
	"path/filepath"
	"slices"
	"strconv"
	"strings"
	"text/scanner"

	"cmd/asm/internal/flags"
	"cmd/internal/objabi"
	"cmd/internal/src"
)

// Input is the main input: a stack of readers and some macro definitions.
// It also handles #include processing (by pushing onto the input stack)

	if len(*m) == 0 {
		return ""
	}
	return fmt.Sprint(*m)
}

func (m *MultiFlag) Set(val string) error {
	(*m) = append(*m, val)
	return nil
}

func Usage() {
	fmt.Fprintf(os.Stderr, "usage: asm [options] file.s ...\n")
	fmt.Fprintf(os.Stderr, "Flags:\n")
	flag.PrintDefaults()
	os.Exit(2)
}

func Parse() {
	objabi.Flagparse(Usage)
	if flag.NArg() == 0 {
		flag.Usage()
	}