[ARM] Add armelf_linux_fdpiceabi and armelfb_linux_fdpiceabi BFD backends

Initial definition of these new backends.

2018-04-25  Christophe Lyon  <christophe.lyon@st.com>
	Mickaël Guêné  <mickael.guene@st.com>

	bfd/
	* config.bfd (arm*-*-linux-*): Add arm_elf32_fdpic_be_vec and
	arm_elf32_fdpic_le_vec to targ_selvecs. Accept
	arm*-*-uclinuxfdpiceabi.
	* configure.ac: Add support for arm_elf32_fdpic_be_vec and
	arm_elf32_fdpic_le_vec.
	* configure: Regenerate.
	* elf32-arm.c (struct elf32_arm_link_hash_table): Add fdpic_p.
	(elf32_arm_link_hash_table_create): Initialize fdpic_p.
	(TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, TARGET_BIG_SYM)
	(TARGET_BIG_NAME, elf_match_priority): Define for FDPIC targets.
	(elf32_arm_fdpic_link_hash_table_create): New.
	* targets.c (_bfd_target_vector): Add arm_elf32_fdpic_be_vec and
	arm_elf32_fdpic_le_vec.

	ld/
	* Makefile.am (ALL_EMULATION_SOURCES): Add
	earmelf_linux_fdpiceabi.c and earmelfb_linux_fdpiceabi.c.
	(earmelf_linux_fdpiceabi.c, earmelfb_linux_fdpiceabi.c): New rules.
	* Makefile.in: Regenerate.
	* configure.tgt (arm*-*-uclinuxfdpiceabi): Handle new target.
	* emulparams/armelf_linux_fdpiceabi.sh: New.
	* emulparams/armelfb_linux_fdpiceabi.sh: New.

12 files changed, 131 insertions, 3 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 91a41ae..ed96fcd 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,20 @@
+2018-04-25  Christophe Lyon  <christophe.lyon@st.com>
+	Mickaël Guêné  <mickael.guene@st.com>
+
+	* config.bfd (arm*-*-linux-*): Add arm_elf32_fdpic_be_vec and
+	arm_elf32_fdpic_le_vec to targ_selvecs. Accept
+	arm*-*-uclinuxfdpiceabi.
+	* configure.ac: Add support for arm_elf32_fdpic_be_vec and
+	arm_elf32_fdpic_le_vec.
+	* configure: Regenerate.
+	* elf32-arm.c (struct elf32_arm_link_hash_table): Add fdpic_p.
+	(elf32_arm_link_hash_table_create): Initialize fdpic_p.
+	(TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, TARGET_BIG_SYM)
+	(TARGET_BIG_NAME, elf_match_priority): Define for FDPIC targets.
+	(elf32_arm_fdpic_link_hash_table_create): New.
+	* targets.c (_bfd_target_vector): Add arm_elf32_fdpic_be_vec and
+	arm_elf32_fdpic_le_vec.
+
 2018-04-25  Alan Modra  <amodra@gmail.com>
 
 	* elf-linux-core.h: Disable gcc-8 string truncation warning.
diff --git a/bfd/config.bfd b/bfd/config.bfd
index 24f6573..0b40636 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -386,9 +386,9 @@ case "${targ}" in
     ;;
   arm-*-elf | arm*-*-freebsd* | arm*-*-linux-* | arm*-*-conix* | \
   arm*-*-uclinux* | arm-*-kfreebsd*-gnu | \
-  arm*-*-eabi* | arm-*-rtems*)
+  arm*-*-eabi* | arm-*-rtems* | arm*-*-uclinuxfdpiceabi)
     targ_defvec=arm_elf32_le_vec
-    targ_selvecs=arm_elf32_be_vec
+    targ_selvecs="arm_elf32_fdpic_le_vec arm_elf32_be_vec arm_elf32_fdpic_be_vec"
     ;;
   arm*-*-vxworks | arm*-*-windiss)
     targ_defvec=arm_elf32_vxworks_le_vec
diff --git a/bfd/configure b/bfd/configure
index c23dd19..ab9e8ee 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -14347,6 +14347,8 @@ do
     arc_elf32_le_vec)		 tb="$tb elf32-arc.lo elf32.lo $elf" ;;
     arm_elf32_be_vec)		 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_le_vec)		 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
+    arm_elf32_fdpic_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
+    arm_elf32_fdpic_le_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_nacl_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_nacl_le_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_symbian_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
diff --git a/bfd/configure.ac b/bfd/configure.ac
index 7bcbb16..ae79461 100644
--- a/bfd/configure.ac
+++ b/bfd/configure.ac
@@ -424,6 +424,8 @@ do
     arc_elf32_le_vec)		 tb="$tb elf32-arc.lo elf32.lo $elf" ;;
     arm_elf32_be_vec)		 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_le_vec)		 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
+    arm_elf32_fdpic_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
+    arm_elf32_fdpic_le_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_nacl_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_nacl_le_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
     arm_elf32_symbian_be_vec)	 tb="$tb elf32-arm.lo elf32.lo elf-nacl.lo elf-vxworks.lo $elf" ;;
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index ce9c2f2..565bb40 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -3228,6 +3228,9 @@ struct elf32_arm_link_hash_table
   unsigned int bfd_count;
   unsigned int top_index;
   asection **input_list;
+
+  /* True if the target system uses FDPIC. */
+  int fdpic_p;
 };
 
 static inline int
@@ -3806,6 +3809,7 @@ elf32_arm_link_hash_table_create (bfd *abfd)
 #endif
   ret->use_rel = TRUE;
   ret->obfd = abfd;
+  ret->fdpic_p = 0;
 
   if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
 			    sizeof (struct elf32_arm_stub_hash_entry)))
@@ -19411,6 +19415,46 @@ elf32_arm_nacl_plt_sym_val (bfd_vma i, const asection *plt,
 #define ELF_COMMONPAGESIZE		0x1000
 
 
+/* FDPIC Targets.  */
+
+#undef  TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM		arm_elf32_fdpic_le_vec
+#undef  TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME		"elf32-littlearm-fdpic"
+#undef  TARGET_BIG_SYM
+#define TARGET_BIG_SYM			arm_elf32_fdpic_be_vec
+#undef  TARGET_BIG_NAME
+#define TARGET_BIG_NAME			"elf32-bigarm-fdpic"
+#undef elf_match_priority
+#define elf_match_priority		128
+
+/* Like elf32_arm_link_hash_table_create -- but overrides
+   appropriately for FDPIC.  */
+
+static struct bfd_link_hash_table *
+elf32_arm_fdpic_link_hash_table_create (bfd *abfd)
+{
+  struct bfd_link_hash_table *ret;
+
+  ret = elf32_arm_link_hash_table_create (abfd);
+  if (ret)
+    {
+      struct elf32_arm_link_hash_table *htab = (struct elf32_arm_link_hash_table *) ret;
+
+      htab->fdpic_p = 1;
+    }
+  return ret;
+}
+
+#undef  elf32_bed
+#define elf32_bed				elf32_arm_fdpic_bed
+
+#undef  bfd_elf32_bfd_link_hash_table_create
+#define bfd_elf32_bfd_link_hash_table_create 	elf32_arm_fdpic_link_hash_table_create
+
+#include "elf32-target.h"
+#undef elf_match_priority
+
 /* VxWorks Targets.  */
 
 #undef	TARGET_LITTLE_SYM
diff --git a/bfd/targets.c b/bfd/targets.c
index 3fb60cb..e490f5f 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -599,6 +599,8 @@ extern const bfd_target arc_elf32_be_vec;
 extern const bfd_target arc_elf32_le_vec;
 extern const bfd_target arm_elf32_be_vec;
 extern const bfd_target arm_elf32_le_vec;
+extern const bfd_target arm_elf32_fdpic_be_vec;
+extern const bfd_target arm_elf32_fdpic_le_vec;
 extern const bfd_target arm_elf32_nacl_be_vec;
 extern const bfd_target arm_elf32_nacl_le_vec;
 extern const bfd_target arm_elf32_symbian_be_vec;
@@ -921,6 +923,8 @@ static const bfd_target * const _bfd_target_vector[] =
 
 	&arm_elf32_be_vec,
 	&arm_elf32_le_vec,
+	&arm_elf32_fdpic_be_vec,
+	&arm_elf32_fdpic_le_vec,
 	&arm_elf32_symbian_be_vec,
 	&arm_elf32_symbian_le_vec,
 	&arm_elf32_vxworks_be_vec,
diff --git a/ld/ChangeLog b/ld/ChangeLog
index 23843c1..e633941 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,14 @@
+2018-04-25  Christophe Lyon  <christophe.lyon@st.com>
+	Mickaël Guêné  <mickael.guene@st.com>
+
+	* Makefile.am (ALL_EMULATION_SOURCES): Add
+	earmelf_linux_fdpiceabi.c and earmelfb_linux_fdpiceabi.c.
+	(earmelf_linux_fdpiceabi.c, earmelfb_linux_fdpiceabi.c): New rules.
+	* Makefile.in: Regenerate.
+	* configure.tgt (arm*-*-uclinuxfdpiceabi): Handle new target.
+	* emulparams/armelf_linux_fdpiceabi.sh: New.
+	* emulparams/armelfb_linux_fdpiceabi.sh: New.
+
 2018-04-25  Alan Modra  <amodra@gmail.com>
 
 	* Makefile.am: Remove arm-aout and arm-coff support.
diff --git a/ld/Makefile.am b/ld/Makefile.am
index a905b15..6464e10 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -172,6 +172,7 @@ ALL_EMULATION_SOURCES = \
 	earmelf_fuchsia.c \
 	earmelf_linux.c \
 	earmelf_linux_eabi.c \
+	earmelf_linux_fdpiceabi.c \
 	earmelf_nacl.c \
 	earmelf_nbsd.c \
 	earmelf_phoenix.c \
@@ -181,6 +182,7 @@ ALL_EMULATION_SOURCES = \
 	earmelfb_fuchsia.c \
 	earmelfb_linux.c \
 	earmelfb_linux_eabi.c \
+	earmelfb_linux_fdpiceabi.c \
 	earmelfb_nacl.c \
 	earmelfb_nbsd.c \
 	earmnto.c \
@@ -703,6 +705,11 @@ earmelf_linux_eabi.c: $(srcdir)/emulparams/armelf_linux_eabi.sh \
   $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
   $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 
+earmelf_linux_fdpiceabi.c: $(srcdir)/emulparams/armelf_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+
 earmelf_nacl.c: $(srcdir)/emulparams/armelf_nacl.sh \
   $(srcdir)/emulparams/armelf_linux_eabi.sh \
   $(srcdir)/emulparams/armelf_linux.sh \
@@ -749,6 +756,12 @@ earmelfb_linux_eabi.c: $(srcdir)/emulparams/armelfb_linux_eabi.sh \
   $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
   $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 
+earmelfb_linux_fdpiceabi.c: $(srcdir)/emulparams/armelfb_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelfb_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+
 earmelfb_nacl.c: $(srcdir)/emulparams/armelfb_nacl.sh \
   $(srcdir)/emulparams/armelf_nacl.sh \
   $(srcdir)/emulparams/armelf_linux_eabi.sh \
diff --git a/ld/Makefile.in b/ld/Makefile.in
index d2201ac..8e0122c 100644
--- a/ld/Makefile.in
+++ b/ld/Makefile.in
@@ -541,6 +541,7 @@ ALL_EMULATION_SOURCES = \
 	earmelf_fuchsia.c \
 	earmelf_linux.c \
 	earmelf_linux_eabi.c \
+	earmelf_linux_fdpiceabi.c \
 	earmelf_nacl.c \
 	earmelf_nbsd.c \
 	earmelf_phoenix.c \
@@ -550,6 +551,7 @@ ALL_EMULATION_SOURCES = \
 	earmelfb_fuchsia.c \
 	earmelfb_linux.c \
 	earmelfb_linux_eabi.c \
+	earmelfb_linux_fdpiceabi.c \
 	earmelfb_nacl.c \
 	earmelfb_nbsd.c \
 	earmnto.c \
@@ -1086,6 +1088,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_fuchsia.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_linux.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_linux_eabi.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_linux_fdpiceabi.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_nacl.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_nbsd.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelf_phoenix.Po@am__quote@
@@ -1095,6 +1098,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_fuchsia.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_linux.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_linux_eabi.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_linux_fdpiceabi.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_nacl.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmelfb_nbsd.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/earmnto.Po@am__quote@
@@ -2202,6 +2206,11 @@ earmelf_linux_eabi.c: $(srcdir)/emulparams/armelf_linux_eabi.sh \
   $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
   $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 
+earmelf_linux_fdpiceabi.c: $(srcdir)/emulparams/armelf_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+
 earmelf_nacl.c: $(srcdir)/emulparams/armelf_nacl.sh \
   $(srcdir)/emulparams/armelf_linux_eabi.sh \
   $(srcdir)/emulparams/armelf_linux.sh \
@@ -2248,6 +2257,12 @@ earmelfb_linux_eabi.c: $(srcdir)/emulparams/armelfb_linux_eabi.sh \
   $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
   $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 
+earmelfb_linux_fdpiceabi.c: $(srcdir)/emulparams/armelfb_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelf_linux_fdpiceabi.sh \
+  $(srcdir)/emulparams/armelf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/armelf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+
 earmelfb_nacl.c: $(srcdir)/emulparams/armelfb_nacl.sh \
   $(srcdir)/emulparams/armelf_nacl.sh \
   $(srcdir)/emulparams/armelf_linux_eabi.sh \
diff --git a/ld/configure.tgt b/ld/configure.tgt
index 1b45611..1999010 100644
--- a/ld/configure.tgt
+++ b/ld/configure.tgt
@@ -129,7 +129,12 @@ arm*b-*-linux-*)	targ_emul=armelfb_linux
 			targ_extra_libpath="armelf_linux"
 			;;
 arm*-*-linux-*eabi*)	targ_emul=armelf_linux_eabi
-			targ_extra_emuls=armelfb_linux_eabi
+			targ_extra_emuls="armelfb_linux_eabi"
+			targ_extra_libpath=$targ_extra_emuls
+			;;
+arm*-*-uclinuxfdpiceabi)
+			targ_emul=armelf_linux_eabi
+			targ_extra_emuls="armelfb_linux_eabi armelf_linux_fdpiceabi armelfb_linux_fdpiceabi"
 			targ_extra_libpath=$targ_extra_emuls
 			;;
 arm*-*-linux-*)		targ_emul=armelf_linux
diff --git a/ld/emulparams/armelf_linux_fdpiceabi.sh b/ld/emulparams/armelf_linux_fdpiceabi.sh
new file mode 100644
index 0000000..104cf38
--- /dev/null
+++ b/ld/emulparams/armelf_linux_fdpiceabi.sh
@@ -0,0 +1,13 @@
+. ${srcdir}/emulparams/armelf_linux.sh
+
+OUTPUT_FORMAT="elf32-littlearm-fdpic"
+BIG_OUTPUT_FORMAT="elf32-bigarm-fdpic"
+LITTLE_OUTPUT_FORMAT="elf32-littlearm-fdpic"
+
+# Use the ARM ABI-compliant exception-handling sections.
+OTHER_READONLY_SECTIONS="
+  .ARM.extab ${RELOCATING-0} : { *(.ARM.extab${RELOCATING+* .gnu.linkonce.armextab.*}) }
+  ${RELOCATING+ PROVIDE_HIDDEN (__exidx_start = .); }
+  .ARM.exidx ${RELOCATING-0} : { *(.ARM.exidx${RELOCATING+* .gnu.linkonce.armexidx.*}) }
+  ${RELOCATING+ PROVIDE_HIDDEN (__exidx_end = .); }"
+
diff --git a/ld/emulparams/armelfb_linux_fdpiceabi.sh b/ld/emulparams/armelfb_linux_fdpiceabi.sh
new file mode 100644
index 0000000..988ea7a
--- /dev/null
+++ b/ld/emulparams/armelfb_linux_fdpiceabi.sh
@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/armelf_linux_fdpiceabi.sh
+OUTPUT_FORMAT="elf32-bigarm-fdpic"