Separate library code, build .a/.so

[centaur.git] / src / libelfu / modelops / check.c

diff --git a/src/libelfu/modelops/check.c b/src/libelfu/modelops/check.c
new file mode 100644 (file)
index 0000000..5234bef
--- /dev/null
+++ b/src/libelfu/modelops/check.c
@@ -0,0 +1,54 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <libelfu/libelfu.h>
+
+
+int elfu_mCheck(ElfuElf *me)
+{
+  size_t numSecs;
+  ElfuScn **sortedSecs;
+  size_t i;
+
+  sortedSecs = elfu_mScnSortedByOffset(me, &numSecs);
+  if (!sortedSecs) {
+    return -1;
+  }
+
+
+  /* Check for overlapping sections */
+  for (i = 0; i < numSecs - 1; i++) {
+    if (sortedSecs[i]->shdr.sh_offset + SCNFILESIZE(&sortedSecs[i]->shdr)
+        > sortedSecs[i+1]->shdr.sh_offset) {
+      ELFU_WARN("elfu_check: Found overlapping sections: %s and %s.\n",
+                elfu_mScnName(me, sortedSecs[i]),
+                elfu_mScnName(me, sortedSecs[i+1]));
+    }
+  }
+
+
+  /* Check for sections overlapping with EHDR */
+  for (i = 0; i < numSecs; i++) {
+    if (sortedSecs[i]->shdr.sh_offset < me->ehdr.e_ehsize) {
+      ELFU_WARN("elfu_check: Found section overlapping with EHDR: %s.\n",
+                elfu_mScnName(me, sortedSecs[i]));
+    }
+  }
+
+
+  /* Check for sections overlapping with PHDRs */
+  for (i = 0; i < numSecs; i++) {
+    if (OVERLAPPING(sortedSecs[i]->shdr.sh_offset,
+                    SCNFILESIZE(&sortedSecs[i]->shdr),
+                    me->ehdr.e_phoff,
+                    me->ehdr.e_phentsize * me->ehdr.e_phnum)) {
+      ELFU_WARN("elfu_check: Found section overlapping with PHDRs: %s.\n",
+                elfu_mScnName(me, sortedSecs[i]));
+    }
+  }
+
+
+  free(sortedSecs);
+
+  return 0;
+}