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TOMOYO Linux Cross Reference
Linux/tools/perf/arch/common.c

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Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #include <stdio.h>
  2 #include <sys/utsname.h>
  3 #include "common.h"
  4 #include "../util/debug.h"
  5 
  6 const char *const arm_triplets[] = {
  7         "arm-eabi-",
  8         "arm-linux-androideabi-",
  9         "arm-unknown-linux-",
 10         "arm-unknown-linux-gnu-",
 11         "arm-unknown-linux-gnueabi-",
 12         NULL
 13 };
 14 
 15 const char *const powerpc_triplets[] = {
 16         "powerpc-unknown-linux-gnu-",
 17         "powerpc64-unknown-linux-gnu-",
 18         NULL
 19 };
 20 
 21 const char *const s390_triplets[] = {
 22         "s390-ibm-linux-",
 23         NULL
 24 };
 25 
 26 const char *const sh_triplets[] = {
 27         "sh-unknown-linux-gnu-",
 28         "sh64-unknown-linux-gnu-",
 29         NULL
 30 };
 31 
 32 const char *const sparc_triplets[] = {
 33         "sparc-unknown-linux-gnu-",
 34         "sparc64-unknown-linux-gnu-",
 35         NULL
 36 };
 37 
 38 const char *const x86_triplets[] = {
 39         "x86_64-pc-linux-gnu-",
 40         "x86_64-unknown-linux-gnu-",
 41         "i686-pc-linux-gnu-",
 42         "i586-pc-linux-gnu-",
 43         "i486-pc-linux-gnu-",
 44         "i386-pc-linux-gnu-",
 45         "i686-linux-android-",
 46         "i686-android-linux-",
 47         NULL
 48 };
 49 
 50 const char *const mips_triplets[] = {
 51         "mips-unknown-linux-gnu-",
 52         "mipsel-linux-android-",
 53         NULL
 54 };
 55 
 56 static bool lookup_path(char *name)
 57 {
 58         bool found = false;
 59         char *path, *tmp;
 60         char buf[PATH_MAX];
 61         char *env = getenv("PATH");
 62 
 63         if (!env)
 64                 return false;
 65 
 66         env = strdup(env);
 67         if (!env)
 68                 return false;
 69 
 70         path = strtok_r(env, ":", &tmp);
 71         while (path) {
 72                 scnprintf(buf, sizeof(buf), "%s/%s", path, name);
 73                 if (access(buf, F_OK) == 0) {
 74                         found = true;
 75                         break;
 76                 }
 77                 path = strtok_r(NULL, ":", &tmp);
 78         }
 79         free(env);
 80         return found;
 81 }
 82 
 83 static int lookup_triplets(const char *const *triplets, const char *name)
 84 {
 85         int i;
 86         char buf[PATH_MAX];
 87 
 88         for (i = 0; triplets[i] != NULL; i++) {
 89                 scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
 90                 if (lookup_path(buf))
 91                         return i;
 92         }
 93         return -1;
 94 }
 95 
 96 /*
 97  * Return architecture name in a normalized form.
 98  * The conversion logic comes from the Makefile.
 99  */
100 static const char *normalize_arch(char *arch)
101 {
102         if (!strcmp(arch, "x86_64"))
103                 return "x86";
104         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
105                 return "x86";
106         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
107                 return "sparc";
108         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
109                 return "arm";
110         if (!strncmp(arch, "s390", 4))
111                 return "s390";
112         if (!strncmp(arch, "parisc", 6))
113                 return "parisc";
114         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
115                 return "powerpc";
116         if (!strncmp(arch, "mips", 4))
117                 return "mips";
118         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
119                 return "sh";
120 
121         return arch;
122 }
123 
124 static int perf_session_env__lookup_binutils_path(struct perf_session_env *env,
125                                                   const char *name,
126                                                   const char **path)
127 {
128         int idx;
129         const char *arch, *cross_env;
130         struct utsname uts;
131         const char *const *path_list;
132         char *buf = NULL;
133 
134         arch = normalize_arch(env->arch);
135 
136         if (uname(&uts) < 0)
137                 goto out;
138 
139         /*
140          * We don't need to try to find objdump path for native system.
141          * Just use default binutils path (e.g.: "objdump").
142          */
143         if (!strcmp(normalize_arch(uts.machine), arch))
144                 goto out;
145 
146         cross_env = getenv("CROSS_COMPILE");
147         if (cross_env) {
148                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
149                         goto out_error;
150                 if (buf[0] == '/') {
151                         if (access(buf, F_OK) == 0)
152                                 goto out;
153                         goto out_error;
154                 }
155                 if (lookup_path(buf))
156                         goto out;
157                 zfree(&buf);
158         }
159 
160         if (!strcmp(arch, "arm"))
161                 path_list = arm_triplets;
162         else if (!strcmp(arch, "powerpc"))
163                 path_list = powerpc_triplets;
164         else if (!strcmp(arch, "sh"))
165                 path_list = sh_triplets;
166         else if (!strcmp(arch, "s390"))
167                 path_list = s390_triplets;
168         else if (!strcmp(arch, "sparc"))
169                 path_list = sparc_triplets;
170         else if (!strcmp(arch, "x86"))
171                 path_list = x86_triplets;
172         else if (!strcmp(arch, "mips"))
173                 path_list = mips_triplets;
174         else {
175                 ui__error("binutils for %s not supported.\n", arch);
176                 goto out_error;
177         }
178 
179         idx = lookup_triplets(path_list, name);
180         if (idx < 0) {
181                 ui__error("Please install %s for %s.\n"
182                           "You can add it to PATH, set CROSS_COMPILE or "
183                           "override the default using --%s.\n",
184                           name, arch, name);
185                 goto out_error;
186         }
187 
188         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
189                 goto out_error;
190 
191 out:
192         *path = buf;
193         return 0;
194 out_error:
195         free(buf);
196         *path = NULL;
197         return -1;
198 }
199 
200 int perf_session_env__lookup_objdump(struct perf_session_env *env)
201 {
202         /*
203          * For live mode, env->arch will be NULL and we can use
204          * the native objdump tool.
205          */
206         if (env->arch == NULL)
207                 return 0;
208 
209         return perf_session_env__lookup_binutils_path(env, "objdump",
210                                                       &objdump_path);
211 }
212 

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