diff mbox series

[v2,4/5] elf: Also parse gnu properties for static linked binaries

Message ID 20240731200307.2269811-5-adhemerval.zanella@linaro.org
State New
Headers show
Series Add support for memory sealing | expand

Commit Message

Adhemerval Zanella July 31, 2024, 8:02 p.m. UTC 
So the static binary can opt-out of memory sealing.

Checked on x86_64-linux-gnu.
---
 elf/dl-support.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/elf/dl-support.c b/elf/dl-support.c
index 8290a380f3..a02ae712b3 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -45,6 +45,7 @@ 
 #include <dl-find_object.h>
 #include <array_length.h>
 #include <dl-symbol-redir-ifunc.h>
+#include <dl-prop.h>
 #include <dl-mseal.h>
 
 extern char *__progname;
@@ -336,6 +337,18 @@  _dl_non_dynamic_init (void)
 	_dl_main_map.l_relro_size = ph->p_memsz;
 	break;
       }
+  /* Process program headers again, but scan them backwards so
+     that PT_NOTE can be skipped if PT_GNU_PROPERTY exits.  */
+  for (const ElfW(Phdr) *ph = &_dl_phdr[_dl_phnum]; ph != _dl_phdr; --ph)
+    switch (ph[-1].p_type)
+      {
+      case PT_NOTE:
+	_dl_process_pt_note (&_dl_main_map, -1, &ph[-1]);
+	break;
+      case PT_GNU_PROPERTY:
+	_dl_process_pt_gnu_property (&_dl_main_map, -1, &ph[-1]);
+	break;
+      }
 
   call_function_static_weak (_dl_find_object_init);