bfd: add support for eBPF

This patch adds support to BFD for elf64-bpf, in both little-endian and big-endian variants. bfd/ChangeLog: 2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com> * configure.ac: Add bpf_elf64_le_vec and bpf_elf64_be_vec. * configure: Regenerated. * Makefile.am (ALL_MACHINES): Add cpu-bpf.lo. (ALL_MACHINES_CFILES): Add cpu-bpf.c. (BFD64_BACKENDS): Add elf64-bpf.lo. (BFD64_BACKENDS_CFILES): Add elf64-bpf.c. * Makefile.in (SOURCE_HFILES): Regenerate. * config.bfd (targ_cpu): Handle bpf-*-* targets. * cpu-bpf.c: New file. * elf64-bpf.c: Likewise. * targets.c (_bfd_target_vector): Add bpf_elf64_be_vec and bpf_elf64_le_vec. * archures.c: Define architecture bfd_arch_bpf and machine bfd_arch_bpf. * reloc.c: Define BFD relocations used by the BPF target. * bfd-in2.h: Regenerated. * libbfd.h: Likewise.
2019-05-23 19:33:41 +02:00 · 2019-05-23 19:33:41 +02:00 · fd0de36e27
commit fd0de36e27
parent 8ebe621240
13 changed files with 609 additions and 8 deletions
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@ -1,3 +1,23 @@
+2019-05-23  Jose E. Marchesi  <jose.marchesi@oracle.com>
+
+	* configure.ac: Add bpf_elf64_le_vec and bpf_elf64_be_vec.
+	* configure: Regenerated.
+	* Makefile.am (ALL_MACHINES): Add cpu-bpf.lo.
+	(ALL_MACHINES_CFILES): Add cpu-bpf.c.
+	(BFD64_BACKENDS): Add elf64-bpf.lo.
+	(BFD64_BACKENDS_CFILES): Add elf64-bpf.c.
+	* Makefile.in (SOURCE_HFILES): Regenerate.
+	* config.bfd (targ_cpu): Handle bpf-*-* targets.
+	* cpu-bpf.c: New file.
+	* elf64-bpf.c: Likewise.
+	* targets.c (_bfd_target_vector): Add bpf_elf64_be_vec and
+	bpf_elf64_le_vec.
+	* archures.c: Define architecture bfd_arch_bpf and machine
+	bfd_arch_bpf.
+	* reloc.c: Define BFD relocations used by the BPF target.
+	* bfd-in2.h: Regenerated.
+	* libbfd.h: Likewise.
+
 2019-05-22  Alan Modra  <amodra@gmail.com>

 	* elf32-arm.c (arm_allocate_glue_section_space): Clear section
--- a/bfd/Makefile.am
+++ b/bfd/Makefile.am
@ -96,6 +96,7 @@ ALL_MACHINES = \
 	cpu-arm.lo \
 	cpu-avr.lo \
 	cpu-bfin.lo \
+	cpu-bpf.lo \
 	cpu-cr16.lo \
 	cpu-cr16c.lo \
 	cpu-cris.lo \
@ -182,6 +183,7 @@ ALL_MACHINES_CFILES = \
 	cpu-arm.c \
 	cpu-avr.c \
 	cpu-bfin.c \
+	cpu-bpf.c \
 	cpu-cr16.c \
 	cpu-cr16c.c \
 	cpu-cris.c \
@ -574,6 +576,7 @@ BFD64_BACKENDS = \
 	elf64-tilegx.lo \
 	elf64-x86-64.lo \
 	elfxx-x86.lo \
+	elf64-bpf.lo \
 	elf64.lo \
 	mach-o-aarch64.lo \
 	mach-o-x86-64.lo \
@ -607,6 +610,7 @@ BFD64_BACKENDS_CFILES = \
 	elf64-tilegx.c \
 	elf64-x86-64.c \
 	elfxx-x86.c \
+	elf64-bpf.c \
 	elf64.c \
 	elfn32-mips.c \
 	elfxx-aarch64.c \
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@ -438,6 +438,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@ -519,6 +520,7 @@ ALL_MACHINES = \
 	cpu-arm.lo \
 	cpu-avr.lo \
 	cpu-bfin.lo \
+	cpu-bpf.lo \
 	cpu-cr16.lo \
 	cpu-cr16c.lo \
 	cpu-cris.lo \
@ -605,6 +607,7 @@ ALL_MACHINES_CFILES = \
 	cpu-arm.c \
 	cpu-avr.c \
 	cpu-bfin.c \
+	cpu-bpf.c \
 	cpu-cr16.c \
 	cpu-cr16c.c \
 	cpu-cris.c \
@ -999,6 +1002,7 @@ BFD64_BACKENDS = \
 	elf64-tilegx.lo \
 	elf64-x86-64.lo \
 	elfxx-x86.lo \
+	elf64-bpf.lo \
 	elf64.lo \
 	mach-o-aarch64.lo \
 	mach-o-x86-64.lo \
@ -1032,6 +1036,7 @@ BFD64_BACKENDS_CFILES = \
 	elf64-tilegx.c \
 	elf64-x86-64.c \
 	elfxx-x86.c \
+	elf64-bpf.c \
 	elf64.c \
 	elfn32-mips.c \
 	elfxx-aarch64.c \
@ -1322,6 +1327,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-arm.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-avr.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-bfin.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-bpf.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-cr16.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-cr16c.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-cris.Plo@am__quote@
@ -1484,6 +1490,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-aarch64.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-alpha.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-bpf.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-gen.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-hppa.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf64-ia64-vms.Plo@am__quote@
--- a/bfd/archures.c
+++ b/bfd/archures.c
@ -415,6 +415,8 @@ DESCRIPTION
 . bfd_arch_iq2000,     {* Vitesse IQ2000.  *}
 .#define bfd_mach_iq2000	1
 .#define bfd_mach_iq10		2
+.  bfd_arch_bpf,       {* Linux eBPF.  *}
+.#define bfd_mach_bpf		1
 .  bfd_arch_epiphany,  {* Adapteva EPIPHANY.  *}
 .#define bfd_mach_epiphany16	1
 .#define bfd_mach_epiphany32	2
@ -601,6 +603,7 @@ extern const bfd_arch_info_type bfd_csky_arch;
 extern const bfd_arch_info_type bfd_d10v_arch;
 extern const bfd_arch_info_type bfd_d30v_arch;
 extern const bfd_arch_info_type bfd_dlx_arch;
+extern const bfd_arch_info_type bfd_bpf_arch;
 extern const bfd_arch_info_type bfd_epiphany_arch;
 extern const bfd_arch_info_type bfd_fr30_arch;
 extern const bfd_arch_info_type bfd_frv_arch;
@ -692,6 +695,7 @@ static const bfd_arch_info_type * const bfd_archures_list[] =
    &bfd_d10v_arch,
    &bfd_d30v_arch,
    &bfd_dlx_arch,
+    &bfd_bpf_arch,
    &bfd_epiphany_arch,
    &bfd_fr30_arch,
    &bfd_frv_arch,
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@ -2357,6 +2357,8 @@ enum bfd_architecture
 bfd_arch_iq2000,     /* Vitesse IQ2000.  */
 #define bfd_mach_iq2000        1
 #define bfd_mach_iq10          2
+  bfd_arch_bpf,       /* Linux eBPF.  */
+#define bfd_mach_bpf           1
  bfd_arch_epiphany,  /* Adapteva EPIPHANY.  */
 #define bfd_mach_epiphany16    1
 #define bfd_mach_epiphany32    2
@ -6651,6 +6653,13 @@ assembler and not (currently) written to any object files.  */
  BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD,
  BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD,

+/* Linux eBPF relocations.  */
+  BFD_RELOC_BPF_64,
+  BFD_RELOC_BPF_32,
+  BFD_RELOC_BPF_16,
+  BFD_RELOC_BPF_DISP16,
+  BFD_RELOC_BPF_DISP32,
+
 /* Adapteva EPIPHANY - 8 bit signed pc-relative displacement  */
  BFD_RELOC_EPIPHANY_SIMM8,

--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@ -480,6 +480,12 @@ case "${targ}" in
    targ_defvec=d30v_elf32_vec
    ;;

+  bpf-*-none)
+    targ_defvec=bpf_elf64_le_vec
+    targ_selvecs=bpf_elf64_be_vec
+    targ_underscore=yes
+    ;;
+
  epiphany-*-*)
    targ_defvec=epiphany_elf32_vec
    targ_underscore=yes
@ -1420,6 +1426,12 @@ case "${targ}" in
    ;;

 # END OF targmatch.h
+  bpf-*-*)
+    echo "*** Configuration $targ is not fully supported." >&2
+    echo "*** Use bpf or bpf-*-none as the target instead." >&2
+    exit 1
+    ;;
+
  *)
    echo 1>&2 "*** BFD does not support target ${targ}."
    echo 1>&2 "*** Look in bfd/config.bfd for supported targets."
--- a/bfd/configure
+++ b/bfd/configure
@ -793,6 +793,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@ -889,6 +890,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@ -1141,6 +1143,15 @@ do
  | -silent | --silent | --silen | --sile | --sil)
    silent=yes ;;

+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
    ac_prev=sbindir ;;
  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@ -1278,7 +1289,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
  eval ac_val=\$$ac_var
  # Remove trailing slashes.
@ -1431,6 +1442,7 @@ Fine tuning of the installation directories:
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@ -11728,7 +11740,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11731 "configure"
+#line 11743 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11834,7 +11846,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11837 "configure"
+#line 11849 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -12223,7 +12235,7 @@ else
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@ -12269,7 +12281,7 @@ else
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@ -12293,7 +12305,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@ -12338,7 +12350,7 @@ else
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@ -12362,7 +12374,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@ -14740,6 +14752,8 @@ do
    elf32_le_vec)		 tb="$tb elf32-gen.lo elf32.lo $elf" ;;
    elf64_be_vec)		 tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
    elf64_le_vec)		 tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
+    bpf_elf64_le_vec)		 tb="$tb elf64-bpf.lo elf64.lo $elf" ;;
+    bpf_elf64_be_vec)		 tb="$tb elf64-bpf.lo elf64.lo $elf" ;;
    epiphany_elf32_vec)		 tb="$tb elf32-epiphany.lo elf32.lo $elf" ;;
    fr30_elf32_vec)		 tb="$tb elf32-fr30.lo elf32.lo $elf" ;;
    frv_elf32_vec)		 tb="$tb elf32-frv.lo elf32.lo $elf" ;;
--- a/bfd/configure.ac
+++ b/bfd/configure.ac
@ -476,6 +476,8 @@ do
    elf32_le_vec)		 tb="$tb elf32-gen.lo elf32.lo $elf" ;;
    elf64_be_vec)		 tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
    elf64_le_vec)		 tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
+    bpf_elf64_le_vec)		 tb="$tb elf64-bpf.lo elf64.lo $elf" ;;
+    bpf_elf64_be_vec)		 tb="$tb elf64-bpf.lo elf64.lo $elf" ;;
    epiphany_elf32_vec)		 tb="$tb elf32-epiphany.lo elf32.lo $elf" ;;
    fr30_elf32_vec)		 tb="$tb elf32-fr30.lo elf32.lo $elf" ;;
    frv_elf32_vec)		 tb="$tb elf32-frv.lo elf32.lo $elf" ;;
--- a/bfd/cpu-bpf.c
+++ b/bfd/cpu-bpf.c
@ -0,0 +1,41 @@
+/* BFD support for the BPF processor.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   Contributed by Oracle Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+
+const bfd_arch_info_type bfd_bpf_arch =
+{
+  64,				/* Bits per word */
+  64,				/* Bits per address.  */
+  8,				/* Bits per byte.  */
+  bfd_arch_bpf,			/* Architecture.  */
+  bfd_mach_bpf,			/* Machine.  */
+  "bpf",			/* Architecture name.  */
+  "bpf",			/* Machine name.  */
+  3,				/* Section align power.  */
+  TRUE,				/* The default ?  */
+  bfd_default_compatible,	/* Architecture comparison fn.  */
+  bfd_default_scan,		/* String to architecture convert fn.  */
+  bfd_arch_default_fill,	/* Default fill.  */
+  NULL				/* Next in list.  */
+};
--- a/bfd/elf64-bpf.c
+++ b/bfd/elf64-bpf.c
@ -0,0 +1,463 @@
+/* Linux bpf specific support for 64-bit ELF
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   Contributed by Oracle Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/bpf.h"
+#include "libiberty.h"
+
+/* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
+#define MINUS_ONE (~ (bfd_vma) 0)
+
+#define BASEADDR(SEC)	((SEC)->output_section->vma + (SEC)->output_offset)
+
+/* Handler for PC-relative relocations, which must be handled in
+   64-bit words.  */
+
+static bfd_reloc_status_type
+bpf_elf_insn_disp_reloc (bfd *abfd,
+                         arelent *reloc_entry,
+                         asymbol *symbol,
+                         void *data,
+                         asection *input_section,
+                         bfd *output_bfd,
+                         char **error_message ATTRIBUTE_UNUSED)
+{
+  bfd_signed_vma relocation;
+  bfd_signed_vma addend;
+  reloc_howto_type *howto = reloc_entry->howto;
+
+  /* This part is from bfd_elf_generic_reloc.  */
+  if (output_bfd != NULL
+      && (symbol->flags & BSF_SECTION_SYM) == 0
+      && (! reloc_entry->howto->partial_inplace
+	  || reloc_entry->addend == 0))
+    {
+      reloc_entry->address += input_section->output_offset;
+      return bfd_reloc_ok;
+    }
+
+  /* This works because partial_inplace is FALSE.  */
+  if (output_bfd != NULL)
+    return bfd_reloc_continue;
+
+  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
+    return bfd_reloc_outofrange;
+
+  relocation = (symbol->value
+		+ symbol->section->output_section->vma
+		+ symbol->section->output_offset);
+  /* Make it PC relative.  */
+  relocation -= (input_section->output_section->vma
+                 + input_section->output_offset);
+  relocation -= reloc_entry->address;
+  /* Make it 64-bit words.  */
+  relocation = relocation / 8;
+
+  /* Get the addend from the instruction and apply it.  */
+  switch (howto->bitsize)
+    {
+    default:
+      abort ();
+      break;
+    case 16:
+      addend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
+      break;
+    case 32:
+      addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address + 4);
+      break;
+    }
+
+  if ((addend & (((~howto->src_mask) >> 1) & howto->src_mask)) != 0)
+    addend -= (((~howto->src_mask) >> 1) & howto->src_mask) << 1;
+  relocation += addend;
+
+  /* Write out the relocated value.  */
+  switch (howto->bitsize)
+    {
+    default:
+      abort ();
+      break;
+    case 16:
+      bfd_put_16 (abfd, relocation, (bfd_byte *) data + reloc_entry->address + 2);
+      break;
+    case 32:
+      bfd_put_32 (abfd, relocation, (bfd_byte *) data + reloc_entry->address + 4);
+      break;
+    }
+
+  /* Check for overflow.  */
+  if (howto->complain_on_overflow == complain_overflow_signed)
+    {
+      bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
+      bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
+      
+      if (relocation > reloc_signed_max || relocation < reloc_signed_min)
+        return bfd_reloc_overflow;
+    }
+  else
+    abort();
+
+  return bfd_reloc_ok;
+}
+
+/* Relocation tables.  */
+static reloc_howto_type bpf_elf_howto_table [] =
+{
+  /* This reloc does nothing.  */
+  HOWTO (R_BPF_NONE,		/* type */
+	 0,			/* rightshift */
+	 3,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_NONE",		/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  /* 64-immediate in LDDW instruction.  */
+  HOWTO (R_BPF_INSN_64,		/* type */
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_INSN_64",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 MINUS_ONE,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  /* 32-immediate in LDDW instruction.  */
+  HOWTO (R_BPF_INSN_32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_INSN_32",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  /* 16-bit offsets in instructions.  */
+  HOWTO (R_BPF_INSN_16,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_INSN_16",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  /* 16-bit PC-relative address in jump instructions.  */
+  HOWTO (R_BPF_INSN_DISP16,	/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 32,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bpf_elf_insn_disp_reloc, /* special_function */
+	 "R_BPF_INSN_DISP16",   /* name */
+	 FALSE,			/* partial_inplace */
+	 0xffff,		/* src_mask */
+	 0xffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_8_PCREL,
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_8_PCREL",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xff,			/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_16_PCREL,
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_16_PCREL",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_32_PCREL,
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_32_PCREL",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_8,
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_unsigned, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_DATA_8",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xff,			/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_16,
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_unsigned, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_DATA_16",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  /* 32-bit PC-relative address in call instructions.  */
+  HOWTO (R_BPF_INSN_DISP32,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bpf_elf_insn_disp_reloc, /* special_function */
+	 "R_BPF_INSN_DISP32",   /* name */
+	 FALSE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  /* 32-bit data.  */
+  HOWTO (R_BPF_DATA_32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_DATA_32",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  /* 64-bit data.  */
+  HOWTO (R_BPF_DATA_64,		/* type */
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_DATA_64",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 MINUS_ONE,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
+  HOWTO (R_BPF_DATA_64_PCREL,
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_BPF_64_PCREL",	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 MINUS_ONE,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+};
+#undef AHOW
+
+/* Map BFD reloc types to bpf ELF reloc types.  */
+
+static reloc_howto_type *
+bpf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+                        bfd_reloc_code_real_type code)
+{
+  /* Note that the bpf_elf_howto_table is indxed by the R_
+     constants.  Thus, the order that the howto records appear in the
+     table *must* match the order of the relocation types defined in
+     include/elf/bpf.h.  */
+
+  switch (code)
+    {
+    case BFD_RELOC_NONE:
+      return &bpf_elf_howto_table[ (int) R_BPF_NONE];
+
+    case BFD_RELOC_8_PCREL:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_8_PCREL];
+    case BFD_RELOC_16_PCREL:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_16_PCREL];
+    case BFD_RELOC_32_PCREL:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_32_PCREL];
+    case BFD_RELOC_64_PCREL:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_64_PCREL];
+
+    case BFD_RELOC_8:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_8];
+    case BFD_RELOC_16:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_16];
+    case BFD_RELOC_32:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_32];
+    case BFD_RELOC_64:
+      return &bpf_elf_howto_table[ (int) R_BPF_DATA_64];
+
+    case BFD_RELOC_BPF_64:
+      return &bpf_elf_howto_table[ (int) R_BPF_INSN_64];
+    case BFD_RELOC_BPF_32:
+      return &bpf_elf_howto_table[ (int) R_BPF_INSN_32];
+    case BFD_RELOC_BPF_16:
+      return &bpf_elf_howto_table[ (int) R_BPF_INSN_16];
+    case BFD_RELOC_BPF_DISP16:
+      return &bpf_elf_howto_table[ (int) R_BPF_INSN_DISP16];
+    case BFD_RELOC_BPF_DISP32:
+      return &bpf_elf_howto_table[ (int) R_BPF_INSN_DISP32];
+
+    default:
+      /* Pacify gcc -Wall.  */
+      return NULL;
+    }
+  return NULL;
+}
+
+/* Map BFD reloc names to bpf ELF reloc names.  */
+
+static reloc_howto_type *
+bpf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
+{
+  unsigned int i;
+
+  for (i = 0; i < ARRAY_SIZE (bpf_elf_howto_table); i++)
+    if (bpf_elf_howto_table[i].name != NULL
+	&& strcasecmp (bpf_elf_howto_table[i].name, r_name) == 0)
+      return &bpf_elf_howto_table[i];
+
+  return NULL;
+}
+
+/* Set the howto pointer for a bpf reloc.  */
+
+static bfd_boolean
+bpf_info_to_howto (bfd *abfd, arelent *bfd_reloc,
+                    Elf_Internal_Rela *elf_reloc)
+{
+  unsigned int r_type;
+
+  r_type = ELF64_R_TYPE (elf_reloc->r_info);
+  if (r_type >= (unsigned int) R_BPF_max)
+    {
+      /* xgettext:c-format */
+      _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+                          abfd, r_type);
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+
+  bfd_reloc->howto = &bpf_elf_howto_table [r_type];
+  return TRUE;
+}
+
+/* Merge backend specific data from an object file to the output
+   object file when linking.  */
+
+static bfd_boolean
+elf64_bpf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
+{
+  /* Check if we have the same endianness.  */
+  if (! _bfd_generic_verify_endian_match (ibfd, info))
+    return FALSE;
+
+  return TRUE;
+}
+
+/* The macros below configure the architecture.  */
+
+#define TARGET_LITTLE_SYM bpf_elf64_le_vec
+#define TARGET_LITTLE_NAME "elf64-bpfle"
+
+#define TARGET_BIG_SYM bpf_elf64_be_vec
+#define TARGET_BIG_NAME "elf64-bpfbe"
+
+#define ELF_ARCH bfd_arch_bpf
+#define ELF_MACHINE_CODE EM_BPF
+
+#define ELF_MAXPAGESIZE 0x100000
+
+#define elf_info_to_howto_rel bpf_info_to_howto
+#define elf_info_to_howto bpf_info_to_howto
+
+#define elf_backend_may_use_rel_p		1
+#define elf_backend_may_use_rela_p		0
+#define elf_backend_default_use_rela_p		0
+
+#define elf_backend_can_gc_sections		0
+
+#define elf_symbol_leading_char			'_'
+#define bfd_elf64_bfd_reloc_type_lookup		bpf_reloc_type_lookup
+#define bfd_elf64_bfd_reloc_name_lookup		bpf_reloc_name_lookup
+
+#define bfd_elf64_bfd_merge_private_bfd_data elf64_bpf_merge_private_bfd_data
+
+#include "elf64-target.h"
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@ -3238,6 +3238,11 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
  "BFD_RELOC_TILEGX_IMM8_X1_TLS_ADD",
  "BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD",
  "BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD",
+  "BFD_RELOC_BPF_64",
+  "BFD_RELOC_BPF_32",
+  "BFD_RELOC_BPF_16",
+  "BFD_RELOC_BPF_DISP16",
+  "BFD_RELOC_BPF_DISP32",
  "BFD_RELOC_EPIPHANY_SIMM8",
  "BFD_RELOC_EPIPHANY_SIMM24",
  "BFD_RELOC_EPIPHANY_HIGH",
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@ -7882,6 +7882,19 @@ ENUMX
 ENUMDOC
  Tilera TILE-Gx Relocations.

+ENUM
+  BFD_RELOC_BPF_64
+ENUMX
+  BFD_RELOC_BPF_32
+ENUMX
+  BFD_RELOC_BPF_16
+ENUMX
+  BFD_RELOC_BPF_DISP16
+ENUMX
+  BFD_RELOC_BPF_DISP32
+ENUMDOC
+  Linux eBPF relocations.
+
 ENUM
  BFD_RELOC_EPIPHANY_SIMM8
 ENUMDOC
--- a/bfd/targets.c
+++ b/bfd/targets.c
@ -639,6 +639,8 @@ extern const bfd_target elf32_be_vec;
 extern const bfd_target elf32_le_vec;
 extern const bfd_target elf64_be_vec;
 extern const bfd_target elf64_le_vec;
+extern const bfd_target bpf_elf64_le_vec;
+extern const bfd_target bpf_elf64_be_vec;
 extern const bfd_target epiphany_elf32_vec;
 extern const bfd_target fr30_elf32_vec;
 extern const bfd_target frv_elf32_vec;
@ -1020,6 +1022,11 @@ static const bfd_target * const _bfd_target_vector[] =

 	&iamcu_elf32_vec,

+#ifdef BFD64
+	&bpf_elf64_be_vec,
+	&bpf_elf64_le_vec,
+#endif
+
 #ifdef BFD64
 #if 0
 	&ia64_elf32_be_vec,