1 /*
2 * Copyright 2010, The Android Open Source Project
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 "RuntimeStub.h"
18
19 #include <bcc/bcc_assert.h>
20
21 #include <stdbool.h>
22 #include <string.h>
23 #include <stdlib.h>
24
25 typedef struct {
26 const char *mName;
27 void *mPtr;
28 } RuntimeFunction;
29
30 #if defined(__arm__) || defined(__mips__)
31 #define DEF_GENERIC_RUNTIME(func) \
32 extern void *func;
33 #define DEF_VFP_RUNTIME(func) \
34 extern void *func ## vfp;
35 #define DEF_LLVM_RUNTIME(func)
36 #define DEF_BCC_RUNTIME(func)
37 #include "Runtime.def"
38 #endif
39
40 static const RuntimeFunction gRuntimes[] = {
41 #if defined(__arm__) || defined(__mips__)
42 #define DEF_GENERIC_RUNTIME(func) \
43 { #func, (void*) &func },
44 // TODO: enable only when target support VFP
45 #define DEF_VFP_RUNTIME(func) \
46 { #func, (void*) &func ## vfp },
47 #else
48 // host compiler library must contain generic runtime
49 #define DEF_GENERIC_RUNTIME(func)
50 #define DEF_VFP_RUNTIME(func)
51 #endif
52 #define DEF_LLVM_RUNTIME(func) \
53 { #func, (void*) &func },
54 #define DEF_BCC_RUNTIME(func) \
55 { #func, &func ## _bcc },
56 #include "Runtime.def"
57 };
58
CompareRuntimeFunction(const void * a,const void * b)59 static int CompareRuntimeFunction(const void *a, const void *b) {
60 return strcmp(((const RuntimeFunction*) a)->mName,
61 ((const RuntimeFunction*) b)->mName);
62 }
63
FindRuntimeFunction(const char * Name)64 void *FindRuntimeFunction(const char *Name) {
65 // binary search
66 const RuntimeFunction Key = { Name, NULL };
67 const RuntimeFunction *R =
68 bsearch(&Key,
69 gRuntimes,
70 sizeof(gRuntimes) / sizeof(RuntimeFunction),
71 sizeof(RuntimeFunction),
72 CompareRuntimeFunction);
73
74 return ((R) ? R->mPtr : NULL);
75 }
76
VerifyRuntimesTable()77 void VerifyRuntimesTable() {
78 unsigned N = sizeof(gRuntimes) / sizeof(RuntimeFunction), i;
79 for(i = 0; i < N; i++) {
80 const char *Name = gRuntimes[i].mName;
81 int *Ptr = FindRuntimeFunction(Name);
82
83 if (Ptr != (int*) gRuntimes[i].mPtr)
84 bccAssert(false && "Table is corrupted (runtime name should be sorted "
85 "in Runtime.def).");
86 }
87 }
88