[glibc] LoongArch: Remove support code for old linker in start.S

[Yinyu Cai <caiyinyu@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=aac842d0edbe53a150ab57a4f776cb50294b6388

commit aac842d0edbe53a150ab57a4f776cb50294b6388
Author: Xi Ruoyao <xry111@xry111.site>
Date:   Sun Aug 27 00:36:50 2023 +0800

    LoongArch: Remove support code for old linker in start.S
    
    We are requiring Binutils >= 2.41, so la.pcrel always works here.
    
    Signed-off-by: Xi Ruoyao <xry111@xry111.site>

Diff:
---
 sysdeps/loongarch/start.S | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S
index e9d82033b7..bf6bfc9ea4 100644
--- a/sysdeps/loongarch/start.S
+++ b/sysdeps/loongarch/start.S
@@ -60,20 +60,7 @@ ENTRY (ENTRY_POINT)
 	cfi_undefined (1)
 	or		a5, a0, zero /* rtld_fini */
 
-#if ENABLE_STATIC_PIE
-/* For static PIE, the GOT cannot be used in _start because the GOT entries are
-   offsets instead of real addresses before __libc_start_main.
-   __libc_start_main and/or main may be not local, so we rely on the linker to
-   produce PLT entries for them.  GNU ld >= 2.40 supports this.  */
-# define LA la.pcrel
-#else
-/* Old GNU ld (< 2.40) cannot handle PC relative address against a non-local
-   function correctly.  We deem these old linkers failing to support static PIE
-   and load the addresses from GOT.  */
-# define LA la.got
-#endif
-
-	LA		a0, t0, main
+	la.pcrel	a0, t0, main
 	REG_L		a1, sp, 0
 	ADDI		a2, sp, SZREG
 
@@ -84,9 +71,9 @@ ENTRY (ENTRY_POINT)
 	move		a4, zero /* used to be fini */
 	or		a6, sp, zero /* stack_end */
 
-	LA		ra, t0, __libc_start_main
+	la.pcrel	ra, t0, __libc_start_main
 	jirl		ra, ra, 0
 
-	LA		ra, t0, abort
+	la.pcrel	ra, t0, abort
 	jirl		ra, ra, 0
 END (ENTRY_POINT)