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