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+// Copyright 2012 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifdef HAVE_CONFIG_H
+#include <config.h> // Must come first
+#endif
+
+#include "common/mac/arch_utilities.h"
+
+#include <mach/machine.h>
+#include <mach-o/arch.h>
+#include <mach-o/fat.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef __APPLE__
+#include <mach-o/utils.h>
+#endif
+
+namespace {
+
+enum Architecture {
+ kArch_i386 = 0,
+ kArch_x86_64,
+ kArch_x86_64h,
+ kArch_arm,
+ kArch_arm64,
+ kArch_arm64e,
+ kArch_ppc,
+ // This must be last.
+ kNumArchitectures
+};
+
+struct NamedArchInfo {
+ const char* name;
+ ArchInfo info;
+};
+
+// enum Architecture above and kKnownArchitectures below
+// must be kept in sync.
+constexpr NamedArchInfo kKnownArchitectures[] = {
+ {"i386", {CPU_TYPE_I386, CPU_SUBTYPE_I386_ALL}},
+ {"x86_64", {CPU_TYPE_X86_64, CPU_SUBTYPE_X86_64_ALL}},
+ {"x86_64h", {CPU_TYPE_X86_64, CPU_SUBTYPE_X86_64_H}},
+ {"arm", {CPU_TYPE_ARM, CPU_SUBTYPE_ARM_ALL}},
+ {"arm64", {CPU_TYPE_ARM64, CPU_SUBTYPE_ARM64_ALL}},
+ {"arm64e", {CPU_TYPE_ARM64, CPU_SUBTYPE_ARM64E}},
+ {"ppc", {CPU_TYPE_POWERPC, CPU_SUBTYPE_POWERPC_ALL}}};
+
+} // namespace
+
+ArchInfo GetLocalArchInfo(void) {
+ Architecture arch;
+#if defined(__i386__)
+ arch = kArch_i386;
+#elif defined(__x86_64__)
+ arch = kArch_x86_64;
+#elif defined(__arm64__) || defined(__aarch64__)
+ arch = kArch_arm64;
+#elif defined(__arm__)
+ arch = kArch_arm;
+#elif defined(__powerpc__)
+ arch = kArch_ppc;
+#else
+ #error "Unsupported CPU architecture"
+#endif
+ return kKnownArchitectures[arch].info;
+}
+
+#ifdef __APPLE__
+
+std::optional<ArchInfo> GetArchInfoFromName(const char* arch_name) {
+ if (__builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, *)) {
+ cpu_type_t type;
+ cpu_subtype_t subtype;
+ if (macho_cpu_type_for_arch_name(arch_name, &type, &subtype)) {
+ return ArchInfo{type, subtype};
+ }
+ } else {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+ const NXArchInfo* info = NXGetArchInfoFromName(arch_name);
+#pragma clang diagnostic pop
+ if (info) {
+ return ArchInfo{info->cputype, info->cpusubtype};
+ }
+ }
+ return std::nullopt;
+}
+
+const char* GetNameFromCPUType(cpu_type_t cpu_type, cpu_subtype_t cpu_subtype) {
+ if (__builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, *)) {
+ const char* name = macho_arch_name_for_cpu_type(cpu_type, cpu_subtype);
+ if (name) {
+ return name;
+ }
+ } else {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+ const NXArchInfo* info = NXGetArchInfoFromCpuType(cpu_type, cpu_subtype);
+#pragma clang diagnostic pop
+ if (info) {
+ return info->name;
+ }
+ }
+
+ return kUnknownArchName;
+}
+
+#else
+
+std::optional<ArchInfo> GetArchInfoFromName(const char* arch_name) {
+ for (int arch = 0; arch < kNumArchitectures; ++arch) {
+ if (!strcmp(arch_name, kKnownArchitectures[arch].name)) {
+ return kKnownArchitectures[arch].info;
+ }
+ }
+ return std::nullopt;
+}
+
+const char* GetNameFromCPUType(cpu_type_t cpu_type, cpu_subtype_t cpu_subtype) {
+ const char* candidate = kUnknownArchName;
+ for (int arch = 0; arch < kNumArchitectures; ++arch) {
+ if (kKnownArchitectures[arch].info.cputype == cpu_type) {
+ if (kKnownArchitectures[arch].info.cpusubtype == cpu_subtype) {
+ return kKnownArchitectures[arch].name;
+ }
+ if (!strcmp(candidate, kUnknownArchName)) {
+ candidate = kKnownArchitectures[arch].name;
+ }
+ }
+ }
+ return candidate;
+}
+#endif // __APPLE__