[gcc r13-2728] LoongArch: Prepare static PIE support

[gcc r13-2728] LoongArch: Prepare static PIE support

[Xi Ruoyao]

https://gcc.gnu.org/g:90d3e27f3a6add0cd6892bdf07c6a2538bb709e4

commit r13-2728-g90d3e27f3a6add0cd6892bdf07c6a2538bb709e4
Author: Xi Ruoyao <xry111@xry111.site>
Date:   Tue Sep 13 23:21:39 2022 +0800

    LoongArch: Prepare static PIE support
    
    Static PIE allows us to extend the ASLR to cover static executables and
    it's not too difficult to support it.  On GCC side, we just pass a group
    of options to the linker, like other ports with static PIE support.
    
    The real implementation of static PIE (rcrt1.o) will be added into Glibc
    later.
    
    gcc/ChangeLog:
    
            * config/loongarch/gnu-user.h (GNU_USER_TARGET_LINK_SPEC): For
            -static-pie, pass -static -pie --no-dynamic-linker -z text to
            the linker, and do not pass --dynamic-linker.

Diff:
---
 gcc/config/loongarch/gnu-user.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gcc/config/loongarch/gnu-user.h b/gcc/config/loongarch/gnu-user.h
index 664dc9206ad..c5b1afe530d 100644
--- a/gcc/config/loongarch/gnu-user.h
+++ b/gcc/config/loongarch/gnu-user.h
@@ -40,8 +40,10 @@ along with GCC; see the file COPYING3.  If not see
 #undef GNU_USER_TARGET_LINK_SPEC
 #define GNU_USER_TARGET_LINK_SPEC \
   "%{G*} %{shared} -m " GNU_USER_LINK_EMULATION \
-  "%{!shared: %{static} %{!static: %{rdynamic:-export-dynamic} " \
-  "-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
+  "%{!shared: %{static} " \
+  "%{!static: %{!static-pie: %{rdynamic:-export-dynamic} " \
+  "-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} " \
+  "%{static-pie: -static -pie --no-dynamic-linker -z text}}"
 
 
 /* Similar to standard Linux, but adding -ffast-math support.  */