Implement orphaned sections

Orphaned sections are not (fully) included in any LOAD PHDR and can thus
be moved and stripped at will without changing the memory image of the
program.

diff --git a/include/libelfu/modeltypes.h b/include/libelfu/modeltypes.h
index e8a9c015ee4f70fc7e3799dbc9771ea26b63c118..bea93222f358088a38696aac2f0f1aa80c456bb1 100644 (file)
--- a/include/libelfu/modeltypes.h
+++ b/include/libelfu/modeltypes.h
@@ -37,6 +37,7 @@ typedef struct {
 
   CIRCLEQ_HEAD(ScnList, ElfuScn) scnList;
   CIRCLEQ_HEAD(PhdrList, ElfuPhdr) phdrList;
+  CIRCLEQ_HEAD(OrphanScnList, ElfuScn) orphanScnList;
 
   ElfuScn *shstrtab;
 } ElfuElf;

diff --git a/src/model/dump.c b/src/model/dump.c
index 882ba0af7d3d36bb27c061b8dd1c9d20c7b3aaea..67a498a184e7a2e531cf6b6624e64b21b9f24168 100644 (file)
--- a/src/model/dump.c
+++ b/src/model/dump.c
@@ -209,6 +209,15 @@ void elfu_mDumpElf(ElfuElf *me)
   ELFU_INFO("\n");
 
 
+  ELFU_INFO("Orphaned sections:\n");
+  CIRCLEQ_FOREACH(ms, &me->orphanScnList, elemChildScn) {
+    ELFU_INFO("        * %-17s @ %8jx\n",
+              elfu_mScnName(me, ms),
+              ms->shdr.sh_addr);
+  }
+  ELFU_INFO("\n");
+
+
   ELFU_INFO("Sections:\n");
   ELFU_INFO("     #  Name              sh_type          sh_addr sh_offset  sh_size ES Fl Al sh_link           sh_info          \n");
   ELFU_INFO("       |                 |               |        |         |        |  |  |  |                 |                 \n");

diff --git a/src/model/fromFile.c b/src/model/fromFile.c
index fd6aba0b83586f8810a5c8c73cbc0515a80d9b4e..cb0935270d355a26f01f369ad348fa2d4ce14c99 100644 (file)
--- a/src/model/fromFile.c
+++ b/src/model/fromFile.c
@@ -167,6 +167,7 @@ ElfuElf* elfu_mFromElf(Elf *e)
   /* General stuff */
   CIRCLEQ_INIT(&me->scnList);
   CIRCLEQ_INIT(&me->phdrList);
+  CIRCLEQ_INIT(&me->orphanScnList);
   me->shstrtab = NULL;
 
   me->elfclass = gelf_getclass(e);
@@ -286,6 +287,8 @@ ElfuElf* elfu_mFromElf(Elf *e)
 
       if (parent) {
         CIRCLEQ_INSERT_TAIL(&parent->childScnList, ms, elemChildScn);
+      } else {
+        CIRCLEQ_INSERT_TAIL(&me->orphanScnList, ms, elemChildScn);
       }
     }