1 /*
2 * Copyright (c) 2018 Google, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <string.h>
18 #include <stdlib.h>
19
20 typedef enum {
21 BCC_ARCH_PPC,
22 BCC_ARCH_PPC_LE,
23 BCC_ARCH_S390X,
24 BCC_ARCH_ARM64,
25 BCC_ARCH_X86
26 } bcc_arch_t;
27
28 typedef void *(*arch_callback_t)(bcc_arch_t arch);
29
run_arch_callback(arch_callback_t fn)30 static void *run_arch_callback(arch_callback_t fn)
31 {
32 const char *archenv = getenv("ARCH");
33
34 /* If ARCH is not set, detect from local arch clang is running on */
35 if (!archenv) {
36 #if defined(__powerpc64__)
37 #if defined(_CALL_ELF) && _CALL_ELF == 2
38 return fn(BCC_ARCH_PPC_LE);
39 #else
40 return fn(BCC_ARCH_PPC);
41 #endif
42 #elif defined(__s390x__)
43 return fn(BCC_ARCH_S390X);
44 #elif defined(__aarch64__)
45 return fn(BCC_ARCH_ARM64);
46 #else
47 return fn(BCC_ARCH_X86);
48 #endif
49 }
50
51 /* Otherwise read it from ARCH */
52 if (!strcmp(archenv, "powerpc")) {
53 #if defined(_CALL_ELF) && _CALL_ELF == 2
54 return fn(BCC_ARCH_PPC_LE);
55 #else
56 return fn(BCC_ARCH_PPC);
57 #endif
58 } else if (!strcmp(archenv, "s390x")) {
59 return fn(BCC_ARCH_S390X);
60 } else if (!strcmp(archenv, "arm64")) {
61 return fn(BCC_ARCH_ARM64);
62 } else {
63 return fn(BCC_ARCH_X86);
64 }
65 }
66