[2.32 COMMITTED 3/5] elf: Move note processing after l_phdr is updated

[2.32 COMMITTED 3/5] elf: Move note processing after l_phdr is updated

[Szabolcs Nagy]

Program headers are processed in two pass: after the first pass
load segments are mmapped so in the second pass target specific
note processing logic can access the notes.

The second pass is moved later so various link_map fields are
set up that may be useful for note processing such as l_phdr.
The second pass should be before the fd is closed so that is
available.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 38a3836011f3fe3290a94ab136dcb5f3c5c9f4e2)

elf: Fix dl-load.c

Rebasing broke commit 38a3836011f3fe3290a94ab136dcb5f3c5c9f4e2
it was supposed to move code.

(cherry picked from commit 751acde7ec335506b54e94ed6f2c998f6c0a22c6)
---
 elf/dl-load.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/elf/dl-load.c b/elf/dl-load.c
index e39980fb19..9ef1cc3203 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -1251,21 +1251,6 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
 				  maplength, has_holes, loader);
     if (__glibc_unlikely (errstring != NULL))
       goto call_lose;
-
-    /* Process program headers again after load segments are mapped in
-       case processing requires accessing those segments.  Scan program
-       headers backward so that PT_NOTE can be skipped if PT_GNU_PROPERTY
-       exits.  */
-    for (ph = &phdr[l->l_phnum]; ph != phdr; --ph)
-      switch (ph[-1].p_type)
-	{
-	case PT_NOTE:
-	  _dl_process_pt_note (l, &ph[-1]);
-	  break;
-	case PT_GNU_PROPERTY:
-	  _dl_process_pt_gnu_property (l, &ph[-1]);
-	  break;
-	}
   }
 
   if (l->l_ld == 0)
@@ -1377,6 +1362,21 @@ cannot enable executable stack as shared object requires");
   if (l->l_tls_initimage != NULL)
     l->l_tls_initimage = (char *) l->l_tls_initimage + l->l_addr;
 
+  /* Process program headers again after load segments are mapped in
+     case processing requires accessing those segments.  Scan program
+     headers backward so that PT_NOTE can be skipped if PT_GNU_PROPERTY
+     exits.  */
+  for (ph = &l->l_phdr[l->l_phnum]; ph != l->l_phdr; --ph)
+    switch (ph[-1].p_type)
+      {
+      case PT_NOTE:
+	_dl_process_pt_note (l, &ph[-1]);
+	break;
+      case PT_GNU_PROPERTY:
+	_dl_process_pt_gnu_property (l, &ph[-1]);
+	break;
+      }
+
   /* We are done mapping in the file.  We no longer need the descriptor.  */
   if (__glibc_unlikely (__close_nocancel (fd) != 0))
     {
-- 
2.17.1