1 files changed, 83 insertions, 0 deletions
diff --git a/debuggerd/utility.c b/debuggerd/utility.c
new file mode 100644
index 00000000..8f3931c1
--- /dev/null
+++ b/debuggerd/utility.c
@@ -0,0 +1,83 @@
+/* system/debuggerd/utility.c
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#include <sys/ptrace.h>
+#include <sys/exec_elf.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+
+#include "utility.h"
+
+/* Get a word from pid using ptrace. The result is the return value. */
+int get_remote_word(int pid, void *src)
+{
+    return ptrace(PTRACE_PEEKTEXT, pid, src, NULL);
+}
+
+
+/* Handy routine to read aggregated data from pid using ptrace. The read 
+ * values are written to the dest locations directly. 
+ */
+void get_remote_struct(int pid, void *src, void *dst, size_t size)
+{
+    unsigned int i;
+
+    for (i = 0; i+4 <= size; i+=4) {
+        *(int *)(dst+i) = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL);
+    }
+
+    if (i < size) {
+        int val;
+
+        assert((size - i) < 4);
+        val = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL);
+        while (i < size) {
+            ((unsigned char *)dst)[i] = val & 0xff;
+            i++;
+            val >>= 8;
+        }
+    }
+}
+
+/* Map a pc address to the name of the containing ELF file */
+const char *map_to_name(mapinfo *mi, unsigned pc, const char* def)
+{
+    while(mi) {
+        if((pc >= mi->start) && (pc < mi->end)){
+            return mi->name;
+        }
+        mi = mi->next;
+    }
+    return def;
+}
+
+/* Find the containing map info for the pc */
+const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc)
+{
+    while(mi) {
+        if((pc >= mi->start) && (pc < mi->end)){
+            // Only calculate the relative offset for shared libraries
+            if (strstr(mi->name, ".so")) {
+                *rel_pc = pc - mi->start;
+            }
+            return mi;
+        }
+        mi = mi->next;
+    }
+    return NULL;
+}