2019-05-23 19:33:41 +02:00
|
|
|
/* Linux bpf specific support for 64-bit ELF
|
2020-01-01 08:57:01 +01:00
|
|
|
Copyright (C) 2019-2020 Free Software Foundation, Inc.
|
2019-05-23 19:33:41 +02:00
|
|
|
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)
|
|
|
|
|
|
|
|
/* 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 */
|
2019-08-07 11:33:13 +02:00
|
|
|
bfd_elf_generic_reloc, /* special_function */
|
2019-05-23 19:33:41 +02:00
|
|
|
"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 */
|
2019-08-07 11:33:13 +02:00
|
|
|
bfd_elf_generic_reloc, /* special_function */
|
2019-05-23 19:33:41 +02:00
|
|
|
"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)
|
|
|
|
{
|
2019-08-07 11:33:13 +02:00
|
|
|
/* Note that the bpf_elf_howto_table is indexed 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
|
2019-05-23 19:33:41 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2019-08-07 11:33:13 +02:00
|
|
|
/* Relocate an eBPF ELF section.
|
|
|
|
|
|
|
|
The RELOCATE_SECTION function is called by the new ELF backend linker
|
|
|
|
to handle the relocations for a section.
|
|
|
|
|
|
|
|
The relocs are always passed as Rela structures; if the section
|
|
|
|
actually uses Rel structures, the r_addend field will always be
|
|
|
|
zero.
|
|
|
|
|
|
|
|
This function is responsible for adjusting the section contents as
|
|
|
|
necessary, and (if using Rela relocs and generating a relocatable
|
|
|
|
output file) adjusting the reloc addend as necessary.
|
|
|
|
|
|
|
|
This function does not have to worry about setting the reloc
|
|
|
|
address or the reloc symbol index.
|
|
|
|
|
|
|
|
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
|
|
|
|
|
|
|
LOCAL_SECTIONS is an array giving the section in the input file
|
|
|
|
corresponding to the st_shndx field of each local symbol.
|
|
|
|
|
|
|
|
The global hash table entry for the global symbols can be found
|
|
|
|
via elf_sym_hashes (input_bfd).
|
|
|
|
|
|
|
|
When generating relocatable output, this function must handle
|
|
|
|
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
|
|
|
going to be the section symbol corresponding to the output
|
|
|
|
section, which means that the addend must be adjusted
|
|
|
|
accordingly. */
|
|
|
|
|
|
|
|
#define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset)
|
|
|
|
|
|
|
|
static bfd_boolean
|
|
|
|
bpf_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
|
|
struct bfd_link_info *info,
|
|
|
|
bfd *input_bfd,
|
|
|
|
asection *input_section,
|
|
|
|
bfd_byte *contents,
|
|
|
|
Elf_Internal_Rela *relocs,
|
|
|
|
Elf_Internal_Sym *local_syms,
|
|
|
|
asection **local_sections)
|
|
|
|
{
|
|
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
|
|
Elf_Internal_Rela *rel;
|
|
|
|
Elf_Internal_Rela *relend;
|
|
|
|
|
|
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
|
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
|
|
relend = relocs + input_section->reloc_count;
|
|
|
|
|
|
|
|
for (rel = relocs; rel < relend; rel ++)
|
|
|
|
{
|
|
|
|
reloc_howto_type * howto;
|
|
|
|
unsigned long r_symndx;
|
|
|
|
Elf_Internal_Sym * sym;
|
|
|
|
asection * sec;
|
|
|
|
struct elf_link_hash_entry * h;
|
|
|
|
bfd_vma relocation;
|
|
|
|
bfd_reloc_status_type r;
|
|
|
|
const char * name = NULL;
|
|
|
|
int r_type ATTRIBUTE_UNUSED;
|
|
|
|
|
|
|
|
r_type = ELF64_R_TYPE (rel->r_info);
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
|
|
|
howto = bpf_elf_howto_table + ELF64_R_TYPE (rel->r_info);
|
|
|
|
h = NULL;
|
|
|
|
sym = NULL;
|
|
|
|
sec = NULL;
|
|
|
|
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
|
|
{
|
|
|
|
sym = local_syms + r_symndx;
|
|
|
|
sec = local_sections [r_symndx];
|
|
|
|
relocation = BASEADDR (sec) + sym->st_value;
|
|
|
|
|
|
|
|
name = bfd_elf_string_from_elf_section
|
|
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
bfd_section_* macros
This large patch removes the unnecessary bfd parameter from various
bfd section macros and functions. The bfd is hardly ever used and if
needed for the bfd_set_section_* or bfd_rename_section functions can
be found via section->owner except for the com, und, abs, and ind
std_section special sections. Those sections shouldn't be modified
anyway.
The patch also removes various bfd_get_section_<field> macros,
replacing their use with bfd_section_<field>, and adds
bfd_set_section_lma. I've also fixed a minor bug in gas where
compressed section renaming was done directly rather than calling
bfd_rename_section. This would have broken bfd_get_section_by_name
and similar functions, but that hardly mattered at such a late stage
in gas processing.
bfd/
* bfd-in.h (bfd_get_section_name, bfd_get_section_vma),
(bfd_get_section_lma, bfd_get_section_alignment),
(bfd_get_section_size, bfd_get_section_flags),
(bfd_get_section_userdata): Delete.
(bfd_section_name, bfd_section_size, bfd_section_vma),
(bfd_section_lma, bfd_section_alignment): Lose bfd parameter.
(bfd_section_flags, bfd_section_userdata): New.
(bfd_is_com_section): Rename parameter.
* section.c (bfd_set_section_userdata, bfd_set_section_vma),
(bfd_set_section_alignment, bfd_set_section_flags, bfd_rename_section),
(bfd_set_section_size): Delete bfd parameter, rename section parameter.
(bfd_set_section_lma): New.
* bfd-in2.h: Regenerate.
* mach-o.c (bfd_mach_o_init_section_from_mach_o): Delete bfd param,
update callers.
* aoutx.h, * bfd.c, * coff-alpha.c, * coff-arm.c, * coff-mips.c,
* coff64-rs6000.c, * coffcode.h, * coffgen.c, * cofflink.c,
* compress.c, * ecoff.c, * elf-eh-frame.c, * elf-hppa.h,
* elf-ifunc.c, * elf-m10200.c, * elf-m10300.c, * elf-properties.c,
* elf-s390-common.c, * elf-vxworks.c, * elf.c, * elf32-arc.c,
* elf32-arm.c, * elf32-avr.c, * elf32-bfin.c, * elf32-cr16.c,
* elf32-cr16c.c, * elf32-cris.c, * elf32-crx.c, * elf32-csky.c,
* elf32-d10v.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c,
* elf32-ft32.c, * elf32-h8300.c, * elf32-hppa.c, * elf32-i386.c,
* elf32-ip2k.c, * elf32-iq2000.c, * elf32-lm32.c, * elf32-m32c.c,
* elf32-m32r.c, * elf32-m68hc1x.c, * elf32-m68k.c, * elf32-mcore.c,
* elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c,
* elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c,
* elf32-nios2.c, * elf32-or1k.c, * elf32-ppc.c, * elf32-pru.c,
* elf32-rl78.c, * elf32-rx.c, * elf32-s390.c, * elf32-score.c,
* elf32-score7.c, * elf32-sh.c, * elf32-spu.c, * elf32-tic6x.c,
* elf32-tilepro.c, * elf32-v850.c, * elf32-vax.c, * elf32-visium.c,
* elf32-xstormy16.c, * elf32-xtensa.c, * elf64-alpha.c,
* elf64-bpf.c, * elf64-hppa.c, * elf64-ia64-vms.c, * elf64-mmix.c,
* elf64-ppc.c, * elf64-s390.c, * elf64-sparc.c, * elf64-x86-64.c,
* elflink.c, * elfnn-aarch64.c, * elfnn-ia64.c, * elfnn-riscv.c,
* elfxx-aarch64.c, * elfxx-mips.c, * elfxx-sparc.c,
* elfxx-tilegx.c, * elfxx-x86.c, * i386msdos.c, * linker.c,
* mach-o.c, * mmo.c, * opncls.c, * pdp11.c, * pei-x86_64.c,
* peicode.h, * reloc.c, * section.c, * syms.c, * vms-alpha.c,
* xcofflink.c: Update throughout for bfd section macro and function
changes.
binutils/
* addr2line.c, * bucomm.c, * coffgrok.c, * dlltool.c, * nm.c,
* objcopy.c, * objdump.c, * od-elf32_avr.c, * od-macho.c,
* od-xcoff.c, * prdbg.c, * rdcoff.c, * rddbg.c, * rescoff.c,
* resres.c, * size.c, * srconv.c, * strings.c, * windmc.c: Update
throughout for bfd section macro and function changes.
gas/
* as.c, * as.h, * dw2gencfi.c, * dwarf2dbg.c, * ecoff.c,
* read.c, * stabs.c, * subsegs.c, * subsegs.h, * write.c,
* config/obj-coff-seh.c, * config/obj-coff.c, * config/obj-ecoff.c,
* config/obj-elf.c, * config/obj-macho.c, * config/obj-som.c,
* config/tc-aarch64.c, * config/tc-alpha.c, * config/tc-arc.c,
* config/tc-arm.c, * config/tc-avr.c, * config/tc-bfin.c,
* config/tc-bpf.c, * config/tc-d10v.c, * config/tc-d30v.c,
* config/tc-epiphany.c, * config/tc-fr30.c, * config/tc-frv.c,
* config/tc-h8300.c, * config/tc-hppa.c, * config/tc-i386.c,
* config/tc-ia64.c, * config/tc-ip2k.c, * config/tc-iq2000.c,
* config/tc-lm32.c, * config/tc-m32c.c, * config/tc-m32r.c,
* config/tc-m68hc11.c, * config/tc-mep.c, * config/tc-microblaze.c,
* config/tc-mips.c, * config/tc-mmix.c, * config/tc-mn10200.c,
* config/tc-mn10300.c, * config/tc-msp430.c, * config/tc-mt.c,
* config/tc-nds32.c, * config/tc-or1k.c, * config/tc-ppc.c,
* config/tc-pru.c, * config/tc-rl78.c, * config/tc-rx.c,
* config/tc-s12z.c, * config/tc-s390.c, * config/tc-score.c,
* config/tc-score7.c, * config/tc-sh.c, * config/tc-sparc.c,
* config/tc-spu.c, * config/tc-tic4x.c, * config/tc-tic54x.c,
* config/tc-tic6x.c, * config/tc-tilegx.c, * config/tc-tilepro.c,
* config/tc-v850.c, * config/tc-visium.c, * config/tc-wasm32.c,
* config/tc-xc16x.c, * config/tc-xgate.c, * config/tc-xstormy16.c,
* config/tc-xtensa.c, * config/tc-z8k.c: Update throughout for
bfd section macro and function changes.
* write.c (compress_debug): Use bfd_rename_section.
gdb/
* aarch64-linux-tdep.c, * arm-tdep.c, * auto-load.c,
* coff-pe-read.c, * coffread.c, * corelow.c, * dbxread.c,
* dicos-tdep.c, * dwarf2-frame.c, * dwarf2read.c, * elfread.c,
* exec.c, * fbsd-tdep.c, * gcore.c, * gdb_bfd.c, * gdb_bfd.h,
* hppa-tdep.c, * i386-cygwin-tdep.c, * i386-fbsd-tdep.c,
* i386-linux-tdep.c, * jit.c, * linux-tdep.c, * machoread.c,
* maint.c, * mdebugread.c, * minidebug.c, * mips-linux-tdep.c,
* mips-sde-tdep.c, * mips-tdep.c, * mipsread.c, * nto-tdep.c,
* objfiles.c, * objfiles.h, * osabi.c, * ppc-linux-tdep.c,
* ppc64-tdep.c, * record-btrace.c, * record-full.c, * remote.c,
* rs6000-aix-tdep.c, * rs6000-tdep.c, * s390-linux-tdep.c,
* s390-tdep.c, * solib-aix.c, * solib-dsbt.c, * solib-frv.c,
* solib-spu.c, * solib-svr4.c, * solib-target.c,
* spu-linux-nat.c, * spu-tdep.c, * symfile-mem.c, * symfile.c,
* symmisc.c, * symtab.c, * target.c, * windows-nat.c,
* xcoffread.c, * cli/cli-dump.c, * compile/compile-object-load.c,
* mi/mi-interp.c: Update throughout for bfd section macro and
function changes.
* gcore (gcore_create_callback): Use bfd_set_section_lma.
* spu-tdep.c (spu_overlay_new_objfile): Likewise.
gprof/
* corefile.c, * symtab.c: Update throughout for bfd section
macro and function changes.
ld/
* ldcref.c, * ldctor.c, * ldelf.c, * ldlang.c, * pe-dll.c,
* emultempl/aarch64elf.em, * emultempl/aix.em,
* emultempl/armcoff.em, * emultempl/armelf.em,
* emultempl/cr16elf.em, * emultempl/cskyelf.em,
* emultempl/m68hc1xelf.em, * emultempl/m68kelf.em,
* emultempl/mipself.em, * emultempl/mmix-elfnmmo.em,
* emultempl/mmo.em, * emultempl/msp430.em,
* emultempl/nios2elf.em, * emultempl/pe.em, * emultempl/pep.em,
* emultempl/ppc64elf.em, * emultempl/xtensaelf.em: Update
throughout for bfd section macro and function changes.
libctf/
* ctf-open-bfd.c: Update throughout for bfd section macro changes.
opcodes/
* arc-ext.c: Update throughout for bfd section macro changes.
sim/
* common/sim-load.c, * common/sim-utils.c, * cris/sim-if.c,
* erc32/func.c, * lm32/sim-if.c, * m32c/load.c, * m32c/trace.c,
* m68hc11/interp.c, * ppc/hw_htab.c, * ppc/hw_init.c,
* rl78/load.c, * rl78/trace.c, * rx/gdb-if.c, * rx/load.c,
* rx/trace.c: Update throughout for bfd section macro changes.
2019-09-16 12:55:17 +02:00
|
|
|
name = name == NULL ? bfd_section_name (sec) : name;
|
2019-08-07 11:33:13 +02:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
bfd_boolean warned ATTRIBUTE_UNUSED;
|
|
|
|
bfd_boolean unresolved_reloc ATTRIBUTE_UNUSED;
|
|
|
|
bfd_boolean ignored ATTRIBUTE_UNUSED;
|
|
|
|
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
|
|
h, sec, relocation,
|
|
|
|
unresolved_reloc, warned, ignored);
|
|
|
|
|
|
|
|
name = h->root.root.string;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
|
|
|
|
if (bfd_link_relocatable (info))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
switch (howto->type)
|
|
|
|
{
|
|
|
|
case R_BPF_INSN_DISP16:
|
|
|
|
case R_BPF_INSN_DISP32:
|
|
|
|
{
|
|
|
|
bfd_signed_vma addend;
|
|
|
|
|
|
|
|
/* Make the relocation PC-relative, and change its unit to
|
|
|
|
64-bit words. */
|
|
|
|
relocation -= sec_addr (input_section) + rel->r_offset;
|
|
|
|
/* Make it 64-bit words. */
|
|
|
|
relocation = relocation / 8;
|
|
|
|
|
|
|
|
/* Get the addend from the instruction and apply it. */
|
|
|
|
addend = bfd_get (howto->bitsize, input_bfd,
|
|
|
|
contents + rel->r_offset
|
|
|
|
+ (howto->bitsize == 16 ? 2 : 4));
|
|
|
|
|
|
|
|
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. */
|
|
|
|
bfd_put (howto->bitsize, input_bfd, relocation,
|
|
|
|
contents + rel->r_offset
|
|
|
|
+ (howto->bitsize == 16 ? 2 : 4));
|
|
|
|
|
|
|
|
r = bfd_reloc_ok;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
|
|
contents, rel->r_offset, relocation,
|
|
|
|
rel->r_addend);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (r != bfd_reloc_ok)
|
|
|
|
{
|
|
|
|
const char * msg = NULL;
|
|
|
|
|
|
|
|
switch (r)
|
|
|
|
{
|
|
|
|
case bfd_reloc_overflow:
|
|
|
|
(*info->callbacks->reloc_overflow)
|
|
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
|
|
|
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case bfd_reloc_undefined:
|
|
|
|
(*info->callbacks->undefined_symbol)
|
|
|
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case bfd_reloc_outofrange:
|
|
|
|
msg = _("internal error: out of range error");
|
|
|
|
break;
|
|
|
|
|
|
|
|
case bfd_reloc_notsupported:
|
|
|
|
if (sym != NULL) /* Only if it's not an unresolved symbol. */
|
|
|
|
msg = _("internal error: relocation not supported");
|
|
|
|
break;
|
|
|
|
|
|
|
|
case bfd_reloc_dangerous:
|
|
|
|
msg = _("internal error: dangerous relocation");
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
msg = _("internal error: unknown error");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (msg)
|
|
|
|
(*info->callbacks->warning) (info, msg, name, input_bfd,
|
|
|
|
input_section, rel->r_offset);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
2019-05-23 19:33:41 +02:00
|
|
|
/* 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
|
2019-08-07 11:33:13 +02:00
|
|
|
#define elf_backend_relocate_section bpf_elf_relocate_section
|
2019-05-23 19:33:41 +02:00
|
|
|
|
|
|
|
#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"
|