blob: 29e6e6fe6be4abdd387a925b12166f5a04763900 [file] [log] [blame]
// Copyright 2015-2016 Brian Smith.
//
// 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 AUTHORS DISCLAIM ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
//! Build the non-Rust components.
#![deny(box_pointers)]
#![forbid(
anonymous_parameters,
legacy_directory_ownership,
missing_copy_implementations,
missing_debug_implementations,
missing_docs,
trivial_casts,
trivial_numeric_casts,
unsafe_code,
unstable_features,
unused_extern_crates,
unused_import_braces,
unused_qualifications,
unused_results,
variant_size_differences,
warnings
)]
extern crate cc;
// In the `pregenerate_asm_main()` case we don't want to access (Cargo)
// environment variables at all, so avoid `use std::env` here.
use std::{
fs::{self, DirEntry},
path::{Path, PathBuf},
process::Command,
time::SystemTime,
};
const X86: &str = "x86";
const X86_64: &str = "x86_64";
const AARCH64: &str = "aarch64";
const ARM: &str = "arm";
const NEVER: &str = "Don't ever build this file.";
#[cfg_attr(rustfmt, rustfmt_skip)]
const RING_SRCS: &[(&[&str], &str)] = &[
(&[], "crypto/fipsmodule/aes/aes.c"),
(&[], "crypto/fipsmodule/bn/exponentiation.c"),
(&[], "crypto/fipsmodule/bn/generic.c"),
(&[], "crypto/fipsmodule/bn/montgomery.c"),
(&[], "crypto/fipsmodule/bn/montgomery_inv.c"),
(&[], "crypto/fipsmodule/bn/shift.c"),
(&[], "crypto/fipsmodule/cipher/e_aes.c"),
(&[NEVER], "crypto/cipher_extra/e_aesgcmsiv.c"),
(&[], "crypto/crypto.c"),
(&[], "crypto/fipsmodule/ec/ecp_nistz.c"),
(&[], "crypto/fipsmodule/ec/ecp_nistz256.c"),
(&[], "crypto/fipsmodule/ec/gfp_p256.c"),
(&[], "crypto/fipsmodule/ec/gfp_p384.c"),
(&[], "crypto/limbs/limbs.c"),
(&[], "crypto/mem.c"),
(&[], "crypto/fipsmodule/modes/gcm.c"),
(&[], "third_party/fiat/curve25519.c"),
(&[X86_64, X86], "crypto/cpu-intel.c"),
(&[X86], "crypto/fipsmodule/aes/asm/aes-586.pl"),
(&[X86], "crypto/fipsmodule/aes/asm/aesni-x86.pl"),
(&[X86], "crypto/fipsmodule/aes/asm/vpaes-x86.pl"),
(&[X86], "crypto/fipsmodule/bn/asm/x86-mont.pl"),
(&[X86], "crypto/chacha/asm/chacha-x86.pl"),
(&[X86], "crypto/fipsmodule/ec/asm/ecp_nistz256-x86.pl"),
(&[X86], "crypto/fipsmodule/modes/asm/ghash-x86.pl"),
(&[X86], "crypto/poly1305/asm/poly1305-x86.pl"),
(&[X86], "crypto/fipsmodule/sha/asm/sha256-586.pl"),
(&[X86], "crypto/fipsmodule/sha/asm/sha512-586.pl"),
(&[X86_64], "crypto/fipsmodule/aes/asm/aes-x86_64.pl"),
(&[X86_64], "crypto/fipsmodule/aes/asm/aesni-x86_64.pl"),
(&[X86_64], "crypto/fipsmodule/aes/asm/vpaes-x86_64.pl"),
(&[X86_64], "crypto/fipsmodule/bn/asm/x86_64-mont.pl"),
(&[X86_64], "crypto/fipsmodule/bn/asm/x86_64-mont5.pl"),
(&[X86_64], "crypto/chacha/asm/chacha-x86_64.pl"),
(&[NEVER], "crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl"),
(&[X86_64], "crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl"),
(&[X86_64], "crypto/fipsmodule/modes/asm/aesni-gcm-x86_64.pl"),
(&[X86_64], "crypto/fipsmodule/modes/asm/ghash-x86_64.pl"),
(&[X86_64], "crypto/poly1305/asm/poly1305-x86_64.pl"),
(&[X86_64], SHA512_X86_64),
(&[AARCH64, ARM], "crypto/fipsmodule/aes/asm/aesv8-armx.pl"),
(&[AARCH64, ARM], "crypto/cpu-arm-linux.c"),
(&[AARCH64, ARM], "crypto/cpu-arm.c"),
(&[AARCH64, ARM], "crypto/fipsmodule/modes/asm/ghashv8-armx.pl"),
(&[ARM], "crypto/fipsmodule/aes/asm/aes-armv4.pl"),
(&[ARM], "crypto/fipsmodule/aes/asm/bsaes-armv7.pl"),
(&[ARM], "crypto/fipsmodule/bn/asm/armv4-mont.pl"),
(&[ARM], "crypto/chacha/asm/chacha-armv4.pl"),
(&[ARM], "crypto/curve25519/asm/x25519-asm-arm.S"),
(&[ARM], "crypto/fipsmodule/ec/asm/ecp_nistz256-armv4.pl"),
(&[ARM], "crypto/fipsmodule/modes/asm/ghash-armv4.pl"),
(&[ARM], "crypto/poly1305/asm/poly1305-armv4.pl"),
(&[ARM], "crypto/fipsmodule/sha/asm/sha256-armv4.pl"),
(&[ARM], "crypto/fipsmodule/sha/asm/sha512-armv4.pl"),
(&[AARCH64], "crypto/fipsmodule/bn/asm/armv8-mont.pl"),
(&[AARCH64], "crypto/cpu-aarch64-linux.c"),
(&[AARCH64], "crypto/chacha/asm/chacha-armv8.pl"),
(&[AARCH64], "crypto/fipsmodule/ec/asm/ecp_nistz256-armv8.pl"),
(&[AARCH64], "crypto/poly1305/asm/poly1305-armv8.pl"),
(&[AARCH64], SHA512_ARMV8),
];
const SHA256_X86_64: &str = "crypto/fipsmodule/sha/asm/sha256-x86_64.pl";
const SHA512_X86_64: &str = "crypto/fipsmodule/sha/asm/sha512-x86_64.pl";
const SHA256_ARMV8: &str = "crypto/fipsmodule/sha/asm/sha256-armv8.pl";
const SHA512_ARMV8: &str = "crypto/fipsmodule/sha/asm/sha512-armv8.pl";
const RING_TEST_SRCS: &[&str] = &[("crypto/constant_time_test.c")];
#[cfg_attr(rustfmt, rustfmt_skip)]
const RING_INCLUDES: &[&str] =
&["crypto/fipsmodule/aes/internal.h",
"crypto/fipsmodule/bn/internal.h",
"crypto/fipsmodule/cipher/internal.h",
"crypto/fipsmodule/ec/ecp_nistz256_table.inl",
"crypto/fipsmodule/ec/ecp_nistz384.inl",
"crypto/fipsmodule/ec/ecp_nistz.h",
"crypto/fipsmodule/ec/ecp_nistz384.h",
"crypto/fipsmodule/ec/ecp_nistz256.h",
"crypto/internal.h",
"crypto/limbs/limbs.h",
"crypto/limbs/limbs.inl",
"crypto/fipsmodule/modes/internal.h",
"include/GFp/aes.h",
"include/GFp/arm_arch.h",
"include/GFp/base.h",
"include/GFp/cpu.h",
"include/GFp/mem.h",
"include/GFp/type_check.h",
"third_party/fiat/curve25519_tables.h",
"third_party/fiat/internal.h",
];
#[cfg_attr(rustfmt, rustfmt_skip)]
const RING_PERL_INCLUDES: &[&str] =
&["crypto/perlasm/arm-xlate.pl",
"crypto/perlasm/x86gas.pl",
"crypto/perlasm/x86nasm.pl",
"crypto/perlasm/x86asm.pl",
"crypto/perlasm/x86_64-xlate.pl"];
const RING_BUILD_FILE: &[&str] = &["build.rs"];
const PREGENERATED: &'static str = "pregenerated";
fn c_flags(target: &Target) -> &'static [&'static str] {
if target.env != MSVC {
static NON_MSVC_FLAGS: &[&str] = &[
"-std=c1x", // GCC 4.6 requires "c1x" instead of "c11"
"-Wbad-function-cast",
"-Wmissing-prototypes",
"-Wnested-externs",
"-Wstrict-prototypes",
];
NON_MSVC_FLAGS
} else {
&[]
}
}
fn cpp_flags(target: &Target) -> &'static [&'static str] {
if target.env != MSVC {
static NON_MSVC_FLAGS: &[&str] = &[
"-pedantic",
"-pedantic-errors",
"-Wall",
"-Wextra",
"-Wcast-align",
"-Wcast-qual",
"-Wenum-compare",
"-Wfloat-equal",
"-Wformat=2",
"-Winline",
"-Winvalid-pch",
"-Wmissing-declarations",
"-Wmissing-field-initializers",
"-Wmissing-include-dirs",
"-Wredundant-decls",
"-Wshadow",
"-Wsign-compare",
"-Wundef",
"-Wuninitialized",
"-Wwrite-strings",
"-fno-strict-aliasing",
"-fvisibility=hidden",
"-Wno-cast-align",
];
NON_MSVC_FLAGS
} else {
static MSVC_FLAGS: &[&str] = &[
"/GS", // Buffer security checks.
"/Gy", // Enable function-level linking.
"/EHsc", // C++ exceptions only, only in C++.
"/GR-", // Disable RTTI.
"/Zc:wchar_t",
"/Zc:forScope",
"/Zc:inline",
"/Zc:rvalueCast",
// Warnings.
"/sdl",
"/Wall",
"/wd4127", // C4127: conditional expression is constant
"/wd4464", // C4464: relative include path contains '..'
"/wd4514", // C4514: <name>: unreferenced inline function has be
"/wd4710", // C4710: function not inlined
"/wd4711", // C4711: function 'function' selected for inline expansion
"/wd4820", // C4820: <struct>: <n> bytes padding added after <name>
"/wd5045", /* C5045: Compiler will insert Spectre mitigation for memory load if
* /Qspectre switch specified */
];
MSVC_FLAGS
}
}
const LD_FLAGS: &[&str] = &[];
// None means "any OS" or "any target". The first match in sequence order is
// taken.
const ASM_TARGETS: &[(&str, Option<&str>, &str)] = &[
("x86_64", Some("ios"), "macosx"),
("x86_64", Some("macos"), "macosx"),
("x86_64", Some(WINDOWS), "nasm"),
("x86_64", None, "elf"),
("aarch64", Some("ios"), "ios64"),
("aarch64", None, "linux64"),
("x86", Some(WINDOWS), "win32n"),
("x86", Some("ios"), "macosx"),
("x86", None, "elf"),
("arm", Some("ios"), "ios32"),
("arm", None, "linux32"),
];
const WINDOWS: &'static str = "windows";
const MSVC: &'static str = "msvc";
const MSVC_OBJ_OPT: &'static str = "/Fo";
const MSVC_OBJ_EXT: &'static str = "obj";
fn main() {
if let Ok(package_name) = std::env::var("CARGO_PKG_NAME") {
if package_name == "ring" {
ring_build_rs_main();
return;
}
}
pregenerate_asm_main();
}
fn ring_build_rs_main() {
use std::env;
for (key, value) in env::vars() {
println!("{}: {}", key, value);
}
let out_dir = env::var("OUT_DIR").unwrap();
let out_dir = PathBuf::from(out_dir);
let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
let os = env::var("CARGO_CFG_TARGET_OS").unwrap();
let env = env::var("CARGO_CFG_TARGET_ENV").unwrap();
let (obj_ext, obj_opt) = if env == MSVC {
(MSVC_OBJ_EXT, MSVC_OBJ_OPT)
} else {
("o", "-o")
};
let is_debug = env::var("DEBUG").unwrap() != "false";
let target = Target {
arch,
os,
env,
obj_ext,
obj_opt,
is_debug,
};
let pregenerated = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join(PREGENERATED);
build_c_code(&target, pregenerated, &out_dir);
check_all_files_tracked()
}
fn pregenerate_asm_main() {
let pregenerated = PathBuf::from(PREGENERATED);
std::fs::create_dir(&pregenerated).unwrap();
let pregenerated_tmp = pregenerated.join("tmp");
std::fs::create_dir(&pregenerated_tmp).unwrap();
for &(target_arch, target_os, perlasm_format) in ASM_TARGETS {
// For Windows, package pregenerated object files instead of
// pregenerated assembly language source files, so that the user
// doesn't need to install the assembler.
let asm_dir = if target_os == Some(WINDOWS) {
&pregenerated_tmp
} else {
&pregenerated
};
let perlasm_src_dsts = perlasm_src_dsts(&asm_dir, target_arch, target_os, perlasm_format);
perlasm(&perlasm_src_dsts, target_arch, perlasm_format, None);
if target_os == Some(WINDOWS) {
//let lib_name = ring_asm_name(target_arch);
let srcs = asm_srcs(perlasm_src_dsts);
for src in srcs {
let src_path = PathBuf::from(src);
let obj_path = obj_path(&pregenerated, &src_path, MSVC_OBJ_EXT);
run_command(yasm(&src_path, target_arch, &obj_path));
}
}
}
}
struct Target {
arch: String,
os: String,
env: String,
obj_ext: &'static str,
obj_opt: &'static str,
is_debug: bool,
}
impl Target {
pub fn arch(&self) -> &str { &self.arch }
pub fn os(&self) -> &str { &self.os }
pub fn env(&self) -> &str { &self.env }
pub fn is_debug(&self) -> bool { self.is_debug }
}
fn build_c_code(target: &Target, pregenerated: PathBuf, out_dir: &Path) {
let includes_modified = RING_INCLUDES
.iter()
.chain(RING_BUILD_FILE.iter())
.chain(RING_PERL_INCLUDES.iter())
.map(|f| file_modified(Path::new(*f)))
.max()
.unwrap();
fn is_none_or_equals<T>(opt: Option<T>, other: T) -> bool
where
T: PartialEq,
{
if let Some(value) = opt {
value == other
} else {
true
}
}
let (_, _, perlasm_format) = ASM_TARGETS
.iter()
.find(|entry| {
let &(entry_arch, entry_os, _) = *entry;
entry_arch == target.arch() && is_none_or_equals(entry_os, target.os())
})
.unwrap();
let is_git = std::fs::metadata(".git").is_ok();
let use_pregenerated = !is_git;
let warnings_are_errors = is_git;
let asm_dir = if use_pregenerated {
&pregenerated
} else {
out_dir
};
let perlasm_src_dsts =
perlasm_src_dsts(asm_dir, target.arch(), Some(target.os()), perlasm_format);
if !use_pregenerated {
perlasm(
&perlasm_src_dsts[..],
target.arch(),
perlasm_format,
Some(includes_modified),
);
}
let mut asm_srcs = asm_srcs(perlasm_src_dsts);
// For Windows we also pregenerate the object files for non-Git builds so
// the user doesn't need to install the assembler. On other platforms we
// assume the C compiler also assembles.
if use_pregenerated && target.os() == WINDOWS {
// The pregenerated object files always use ".obj" as the extension,
// even when the C/C++ compiler outputs files with the ".o" extension.
asm_srcs = asm_srcs
.iter()
.map(|src| obj_path(&pregenerated, src.as_path(), "obj"))
.collect::<Vec<_>>();
}
let core_srcs = sources_for_arch(target.arch())
.into_iter()
.filter(|p| !is_perlasm(&p))
.collect::<Vec<_>>();
let test_srcs = RING_TEST_SRCS.iter().map(PathBuf::from).collect::<Vec<_>>();
let libs = [
("ring-core", &core_srcs[..], &asm_srcs[..]),
("ring-test", &test_srcs[..], &[]),
];
// XXX: Ideally, ring-test would only be built for `cargo test`, but Cargo
// can't do that yet.
libs.into_iter()
.for_each(|&(lib_name, srcs, additional_srcs)| {
build_library(
&target,
&out_dir,
lib_name,
srcs,
additional_srcs,
warnings_are_errors,
includes_modified,
)
});
println!(
"cargo:rustc-link-search=native={}",
out_dir.to_str().expect("Invalid path")
);
}
fn build_library(
target: &Target, out_dir: &Path, lib_name: &str, srcs: &[PathBuf], additional_srcs: &[PathBuf],
warnings_are_errors: bool, includes_modified: SystemTime,
) {
// Compile all the (dirty) source files into object files.
#[allow(box_pointers)] // XXX
let objs = additional_srcs
.into_iter()
.chain(srcs.into_iter())
.filter(|f| target.env() != "msvc" || f.extension().unwrap().to_str().unwrap() != "S")
.map(|f| compile(f, target, warnings_are_errors, out_dir, includes_modified))
.collect::<Vec<_>>();
// Rebuild the library if necessary.
let lib_path = PathBuf::from(out_dir).join(format!("lib{}.a", lib_name));
if objs
.iter()
.map(Path::new)
.any(|p| need_run(&p, &lib_path, includes_modified))
{
let mut c = cc::Build::new();
for f in LD_FLAGS {
let _ = c.flag(&f);
}
match target.os() {
"macos" => {
let _ = c.flag("-fPIC");
let _ = c.flag("-Wl,-dead_strip");
},
_ => {
let _ = c.flag("-Wl,--gc-sections".into());
},
}
for o in objs {
let _ = c.object(o);
}
// Handled below.
let _ = c.cargo_metadata(false);
c.compile(
lib_path
.file_name()
.and_then(|f| f.to_str())
.expect("No filename"),
);
}
// Link the library. This works even when the library doesn't need to be
// rebuilt.
println!("cargo:rustc-link-lib=static={}", lib_name);
}
fn compile(
p: &Path, target: &Target, warnings_are_errors: bool, out_dir: &Path,
includes_modified: SystemTime,
) -> String {
let ext = p.extension().unwrap().to_str().unwrap();
if ext == "obj" {
p.to_str().expect("Invalid path").into()
} else {
let mut out_path = out_dir.clone().join(p.file_name().unwrap());
assert!(out_path.set_extension(target.obj_ext));
if need_run(&p, &out_path, includes_modified) {
let cmd = if target.os() != WINDOWS || ext != "asm" {
cc(p, ext, target, warnings_are_errors, &out_path)
} else {
yasm(p, target.arch(), &out_path)
};
run_command(cmd);
}
out_path.to_str().expect("Invalid path").into()
}
}
fn obj_path(out_dir: &Path, src: &Path, obj_ext: &str) -> PathBuf {
let mut out_path = out_dir.clone().join(src.file_name().unwrap());
assert!(out_path.set_extension(obj_ext));
out_path
}
fn cc(
file: &Path, ext: &str, target: &Target, warnings_are_errors: bool, out_dir: &Path,
) -> Command {
let mut c = cc::Build::new();
let _ = c.include("include");
match ext {
"c" =>
for f in c_flags(target) {
let _ = c.flag(f);
},
"S" => (),
e => panic!("Unsupported file extension: {:?}", e),
};
for f in cpp_flags(target) {
let _ = c.flag(&f);
}
if target.os() != "none" && target.os() != "redox" && target.os() != "windows" {
let _ = c.flag("-fstack-protector");
}
match (target.os(), target.env()) {
// ``-gfull`` is required for Darwin's |-dead_strip|.
("macos", _) => {
let _ = c.flag("-gfull");
},
(_, "msvc") => (),
_ => {
let _ = c.flag("-g3");
},
};
if !target.is_debug() {
let _ = c.define("NDEBUG", None);
}
if target.env() == "msvc" {
if std::env::var("OPT_LEVEL").unwrap() == "0" {
let _ = c.flag("/Od"); // Disable optimization for debug builds.
// run-time checking: (s)tack frame, (u)ninitialized variables
let _ = c.flag("/RTCsu");
} else {
let _ = c.flag("/Ox"); // Enable full optimization.
}
}
if target.env() != "msvc" {
let _ = c.define("_XOPEN_SOURCE", Some("700"));
}
if warnings_are_errors {
let flag = if target.env() != "msvc" {
"-Werror"
} else {
"/WX"
};
let _ = c.flag(flag);
}
if target.env() == "musl" {
// Some platforms enable _FORTIFY_SOURCE by default, but musl
// libc doesn't support it yet. See
// http://wiki.musl-libc.org/wiki/Future_Ideas#Fortify
// http://www.openwall.com/lists/musl/2015/02/04/3
// http://www.openwall.com/lists/musl/2015/06/17/1
let _ = c.flag("-U_FORTIFY_SOURCE");
}
let mut c = c.get_compiler().to_command();
let _ = c
.arg("-c")
.arg(format!(
"{}{}",
target.obj_opt,
out_dir.to_str().expect("Invalid path")
))
.arg(file);
c
}
fn yasm(file: &Path, arch: &str, out_file: &Path) -> Command {
let (oformat, machine) = match arch {
"x86_64" => ("--oformat=win64", "--machine=amd64"),
"x86" => ("--oformat=win32", "--machine=x86"),
_ => panic!("unsupported arch: {}", arch),
};
let mut c = Command::new("yasm.exe");
let _ = c
.arg("-X")
.arg("vc")
.arg("--dformat=cv8")
.arg(oformat)
.arg(machine)
.arg("-o")
.arg(out_file.to_str().expect("Invalid path"))
.arg(file);
c
}
fn run_command_with_args<S>(command_name: S, args: &[String])
where
S: AsRef<std::ffi::OsStr> + Copy,
{
let mut cmd = Command::new(command_name);
let _ = cmd.args(args);
run_command(cmd)
}
fn run_command(mut cmd: Command) {
println!("running {:?}", cmd);
let status = cmd.status().unwrap_or_else(|e| {
panic!("failed to execute [{:?}]: {}", cmd, e);
});
if !status.success() {
panic!("execution failed");
}
}
fn sources_for_arch(arch: &str) -> Vec<PathBuf> {
RING_SRCS
.iter()
.filter(|&&(archs, _)| archs.is_empty() || archs.contains(&arch))
.map(|&(_, p)| PathBuf::from(p))
.collect::<Vec<_>>()
}
fn perlasm_src_dsts(
out_dir: &Path, arch: &str, os: Option<&str>, perlasm_format: &str,
) -> Vec<(PathBuf, PathBuf)> {
let srcs = sources_for_arch(arch);
let mut src_dsts = srcs
.iter()
.filter(|p| is_perlasm(p))
.map(|src| (src.clone(), asm_path(out_dir, src, os, perlasm_format)))
.collect::<Vec<_>>();
// Some PerlAsm source files need to be run multiple times with different
// output paths.
{
// Appease the borrow checker.
let mut maybe_synthesize = |concrete, synthesized| {
let concrete_path = PathBuf::from(concrete);
if srcs.contains(&concrete_path) {
let synthesized_path = PathBuf::from(synthesized);
src_dsts.push((
concrete_path,
asm_path(out_dir, &synthesized_path, os, perlasm_format),
))
}
};
maybe_synthesize(SHA512_X86_64, SHA256_X86_64);
maybe_synthesize(SHA512_ARMV8, SHA256_ARMV8);
}
src_dsts
}
fn asm_srcs(perlasm_src_dsts: Vec<(PathBuf, PathBuf)>) -> Vec<PathBuf> {
perlasm_src_dsts
.into_iter()
.map(|(_src, dst)| dst)
.collect::<Vec<_>>()
}
fn is_perlasm(path: &PathBuf) -> bool { path.extension().unwrap().to_str().unwrap() == "pl" }
fn asm_path(out_dir: &Path, src: &Path, os: Option<&str>, perlasm_format: &str) -> PathBuf {
let src_stem = src.file_stem().expect("source file without basename");
let dst_stem = src_stem.to_str().unwrap();
let dst_extension = if os == Some("windows") { "asm" } else { "S" };
let dst_filename = format!("{}-{}.{}", dst_stem, perlasm_format, dst_extension);
out_dir.join(dst_filename)
}
fn perlasm(
src_dst: &[(PathBuf, PathBuf)], arch: &str, perlasm_format: &str,
includes_modified: Option<SystemTime>,
) {
for (src, dst) in src_dst {
if let Some(includes_modified) = includes_modified {
if !need_run(src, dst, includes_modified) {
continue;
}
}
let mut args = Vec::<String>::new();
args.push(src.to_string_lossy().into_owned());
args.push(perlasm_format.to_owned());
if arch == "x86" {
args.push("-fPIC".into());
args.push("-DOPENSSL_IA32_SSE2".into());
}
// Work around PerlAsm issue for ARM and AAarch64 targets by replacing
// back slashes with forward slashes.
let dst = dst
.to_str()
.expect("Could not convert path")
.replace("\\", "/");
args.push(dst);
run_command_with_args(&get_command("PERL_EXECUTABLE", "perl"), &args);
}
}
fn need_run(source: &Path, target: &Path, includes_modified: SystemTime) -> bool {
let s_modified = file_modified(source);
if let Ok(target_metadata) = std::fs::metadata(target) {
let target_modified = target_metadata.modified().unwrap();
s_modified >= target_modified || includes_modified >= target_modified
} else {
// On error fetching metadata for the target file, assume the target
// doesn't exist.
true
}
}
fn file_modified(path: &Path) -> SystemTime {
let path = Path::new(path);
let path_as_str = format!("{:?}", path);
std::fs::metadata(path)
.expect(&path_as_str)
.modified()
.expect("nah")
}
fn get_command(var: &str, default: &str) -> String { std::env::var(var).unwrap_or(default.into()) }
fn check_all_files_tracked() {
for path in &["crypto", "include", "third_party/fiat"] {
walk_dir(&PathBuf::from(path), &is_tracked);
}
}
fn is_tracked(file: &DirEntry) {
let p = file.path();
let cmp = |f| p == PathBuf::from(f);
let tracked = match p.extension().and_then(|p| p.to_str()) {
Some("h") | Some("inl") => RING_INCLUDES.iter().any(cmp),
Some("c") | Some("S") | Some("asm") =>
RING_SRCS.iter().any(|(_, f)| cmp(f)) || RING_TEST_SRCS.iter().any(cmp),
Some("pl") => RING_SRCS.iter().any(|(_, f)| cmp(f)) || RING_PERL_INCLUDES.iter().any(cmp),
_ => true,
};
if !tracked {
panic!("{:?} is not tracked in build.rs", p);
}
}
fn walk_dir<F>(dir: &Path, cb: &F)
where
F: Fn(&DirEntry),
{
if dir.is_dir() {
for entry in fs::read_dir(dir).unwrap() {
let entry = entry.unwrap();
let path = entry.path();
if path.is_dir() {
walk_dir(&path, cb);
} else {
cb(&entry);
}
}
}
}