Add -static-pie to GCC driver to create static PIE

This patch adds -static-pie to GCC driver to create static PIE.  A static
position independent executable (PIE) is similar to static executable,
but can be loaded at any address without a dynamic linker.  All linker
input files must be compiled with -fpie or -fPIE and linker must support
--no-dynamic-linker to avoid linking with dynamic linker.  "-z text" is
also needed to prevent dynamic relocations in read-only segments.

	PR driver/81498
	* common.opt (-static-pie): New alias.
	(shared): Negate static-pie.
	(-no-pie): Update help text.
	(-pie): Likewise.
	(static-pie): New option.
	* config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add
	-static-pie support.
	(GNU_USER_TARGET_ENDFILE_SPEC): Likewise.
	(LINK_EH_SPEC): Likewise.
	(LINK_GCC_C_SEQUENCE_SPEC): Likewise.
	* config/i386/gnu-user.h (GNU_USER_TARGET_LINK_SPEC): Likewise.
	* config/i386/gnu-user64.h (GNU_USER_TARGET_LINK_SPEC): Likewise.
	* gcc.c (LINK_COMMAND_SPEC): Likewise.
	(init_gcc_specs): Likewise.
	(init_spec): Likewise.
	(display_help): Update help message for -pie.
	* doc/invoke.texi: Update -pie, -no-pie and -static.  Document
	-static-pie.

From-SVN: r252034

3 files changed, 18 insertions, 15 deletions

diff --git a/gcc/config/gnu-user.h b/gcc/config/gnu-user.h
index de605b0..a967b69 100644
--- a/gcc/config/gnu-user.h
+++ b/gcc/config/gnu-user.h
@@ -53,11 +53,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   "%{shared:; \
      pg|p|profile:gcrt1.o%s; \
      static:crt1.o%s; \
-     " PIE_SPEC ":Scrt1.o%s; \
+     static-pie|" PIE_SPEC ":Scrt1.o%s; \
      :crt1.o%s} \
    crti.o%s \
    %{static:crtbeginT.o%s; \
-     shared|" PIE_SPEC ":crtbeginS.o%s; \
+     shared|static-pie|" PIE_SPEC ":crtbeginS.o%s; \
      :crtbegin.o%s} \
    %{fvtable-verify=none:%s; \
      fvtable-verify=preinit:vtv_start_preinit.o%s; \
@@ -70,7 +70,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      :crt1.o%s} \
    crti.o%s \
    %{static:crtbeginT.o%s; \
-     shared|pie:crtbeginS.o%s; \
+     shared|pie|static-pie:crtbeginS.o%s; \
      :crtbegin.o%s} \
    %{fvtable-verify=none:%s; \
      fvtable-verify=preinit:vtv_start_preinit.o%s; \
@@ -92,7 +92,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      fvtable-verify=preinit:vtv_end_preinit.o%s; \
      fvtable-verify=std:vtv_end.o%s} \
    %{static:crtend.o%s; \
-     shared|" PIE_SPEC ":crtendS.o%s; \
+     shared|static-pie|" PIE_SPEC ":crtendS.o%s; \
      :crtend.o%s} \
    crtn.o%s \
    " CRTOFFLOADEND
@@ -102,7 +102,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      fvtable-verify=preinit:vtv_end_preinit.o%s; \
      fvtable-verify=std:vtv_end.o%s} \
    %{static:crtend.o%s; \
-     shared|pie:crtendS.o%s; \
+     shared|pie|static-pie:crtendS.o%s; \
      :crtend.o%s} \
    crtn.o%s \
    " CRTOFFLOADEND
@@ -132,12 +132,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
 
 #if defined(HAVE_LD_EH_FRAME_HDR)
-#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
+#define LINK_EH_SPEC "%{!static|static-pie:--eh-frame-hdr} "
 #endif
 
 #undef LINK_GCC_C_SEQUENCE_SPEC
 #define LINK_GCC_C_SEQUENCE_SPEC \
-  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
+  "%{static|static-pie:--start-group} %G %L \
+   %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}"
 
 /* Use --as-needed -lgcc_s for eh support.  */
 #ifdef HAVE_LD_AS_NEEDED
diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h
index a4c88f1..8983dc9 100644
--- a/gcc/config/i386/gnu-user.h
+++ b/gcc/config/i386/gnu-user.h
@@ -77,9 +77,10 @@ along with GCC; see the file COPYING3.  If not see
 #define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
   %{!shared: \
     %{!static: \
-      %{rdynamic:-export-dynamic} \
-      -dynamic-linker %(dynamic_linker)} \
-      %{static:-static}}"
+      %{!static-pie: \
+	%{rdynamic:-export-dynamic} \
+	-dynamic-linker %(dynamic_linker)}} \
+      %{static:-static} %{static-pie:-static -pie --no-dynamic-linker -z text}}"
 
 #undef	LINK_SPEC
 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
diff --git a/gcc/config/i386/gnu-user64.h b/gcc/config/i386/gnu-user64.h
index 39f5ef6..6fc9eae 100644
--- a/gcc/config/i386/gnu-user64.h
+++ b/gcc/config/i386/gnu-user64.h
@@ -59,11 +59,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   %{shared:-shared} \
   %{!shared: \
     %{!static: \
-      %{rdynamic:-export-dynamic} \
-      %{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
-      %{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
-      %{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}} \
-    %{static:-static}}"
+      %{!static-static: \
+	%{rdynamic:-export-dynamic} \
+	%{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
+	%{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
+	%{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}}} \
+    %{static:-static} %{static-pie:-static -pie --no-dynamic-linker -z text}}"
 
 #undef	LINK_SPEC
 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC