[glibc/maskray/grte] Revert "Add a workaround for lld placing the _GLOBAL_OFFSET_TABLE_ at an unexpected location"

[Fangrui Song <maskray@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=81f61b22f0312af3d411fea7ea2d9b882952264c

commit 81f61b22f0312af3d411fea7ea2d9b882952264c
Author: Fangrui Song <i@maskray.me>
Date:   Thu Aug 26 17:35:02 2021 -0700

    Revert "Add a workaround for lld placing the _GLOBAL_OFFSET_TABLE_ at an unexpected location"
    
    This reverts commit 575707c22f901b0adcce2478cc32da62afff287e.
    
    The issue has been fixed by LLD patch https://reviews.llvm.org/D59594
    and fixed by glibc upstream as well.

Diff:
---
 elf/rtld.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/elf/rtld.c b/elf/rtld.c
index 9d951f2466..498d9f5861 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -519,16 +519,6 @@ _dl_start (void *arg)
 
   /* Read our own dynamic section and fill in the info array.  */
   bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic ();
-  /* As a workaround for lld placing _GLOBAL_OFFSET_TABLE at an
-     unexpected location, detect when the bootstrap map base and
-     dynamic section have the same address, and patch the base value
-     back to something plausible.  This is probably x86_64-specific,
-     and should go away once lld does the right thing.  */
-#ifdef HAVE_EHDR_START
-  extern const ElfW(Ehdr) __ehdr_start __attribute__ ((visibility ("hidden")));
-  if (bootstrap_map.l_ld == ((void *) bootstrap_map.l_addr))
-    bootstrap_map.l_addr -= (((char *) bootstrap_map.l_addr) - ((char *) &__ehdr_start));
-#endif
   elf_get_dynamic_info (&bootstrap_map, NULL);
 
 #if NO_TLS_OFFSET != 0