0dd93002dd
This change reverts the following commits:72d9cba7cb5b61b9ebc53f85e04f402ab24a2d40Change-Id: I669b83f2269cf96aa71a649a346147b9407a811e Reviewed-on: https://boringssl-review.googlesource.com/6056 Reviewed-by: David Benjamin <davidben@chromium.org> Reviewed-by: Adam Langley <agl@google.com>
151 lines
4.2 KiB
Go
151 lines
4.2 KiB
Go
// Copyright (c) 2014, Google Inc.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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// This package generates chacha_vec_arm.S from chacha_vec.c.
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package main
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import (
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"bufio"
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"bytes"
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"os"
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"os/exec"
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"strings"
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)
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const defaultCompiler = "/opt/gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc"
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func main() {
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compiler := defaultCompiler
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if len(os.Args) > 1 {
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compiler = os.Args[1]
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}
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args := []string{
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"-O3",
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"-mcpu=cortex-a8",
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"-mfpu=neon",
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"-fpic",
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"-DASM_GEN",
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"-I", "../../include",
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"-S", "chacha_vec.c",
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"-o", "-",
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}
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output, err := os.OpenFile("chacha_vec_arm.S", os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
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if err != nil {
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panic(err)
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}
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defer output.Close()
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output.WriteString(preamble)
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output.WriteString(compiler)
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output.WriteString(" ")
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output.WriteString(strings.Join(args, " "))
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output.WriteString("\n\n#if !defined(OPENSSL_NO_ASM)\n")
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output.WriteString("#if defined(__arm__) || defined(__aarch64__)\n\n")
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cmd := exec.Command(compiler, args...)
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cmd.Stderr = os.Stderr
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asm, err := cmd.StdoutPipe()
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if err != nil {
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panic(err)
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}
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if err := cmd.Start(); err != nil {
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panic(err)
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}
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attr28 := []byte(".eabi_attribute 28,")
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globalDirective := []byte(".global\t")
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newLine := []byte("\n")
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attr28Handled := false
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scanner := bufio.NewScanner(asm)
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for scanner.Scan() {
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line := scanner.Bytes()
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if bytes.Contains(line, attr28) {
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output.WriteString(attr28Block)
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attr28Handled = true
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continue
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}
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output.Write(line)
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output.Write(newLine)
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if i := bytes.Index(line, globalDirective); i >= 0 {
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output.Write(line[:i])
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output.WriteString(".hidden\t")
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output.Write(line[i+len(globalDirective):])
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output.Write(newLine)
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}
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}
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if err := scanner.Err(); err != nil {
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panic(err)
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}
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if !attr28Handled {
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panic("EABI attribute 28 not seen in processing")
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}
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if err := cmd.Wait(); err != nil {
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panic(err)
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}
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output.WriteString(trailer)
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}
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const preamble = `# Copyright (c) 2014, Google Inc.
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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# This file contains a pre-compiled version of chacha_vec.c for ARM. This is
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# needed to support switching on NEON code at runtime. If the whole of OpenSSL
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# were to be compiled with the needed flags to build chacha_vec.c, then it
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# wouldn't be possible to run on non-NEON systems.
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#
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# This file was generated by chacha_vec_arm_generate.go using the following
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# compiler command:
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#
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# `
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const attr28Block = `
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# EABI attribute 28 sets whether VFP register arguments were used to build this
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# file. If object files are inconsistent on this point, the linker will refuse
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# to link them. Thus we report whatever the compiler expects since we don't use
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# VFP arguments.
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#if defined(__ARM_PCS_VFP)
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.eabi_attribute 28, 1
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#else
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.eabi_attribute 28, 0
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#endif
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`
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const trailer = `
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#endif /* __arm__ || __aarch64__ */
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#endif /* !OPENSSL_NO_ASM */
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`
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