mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
545fd46b6b
relocations. * elfxx-mips.c (mips_reloc_against_discarded_section): New function. (_bfd_mips_elf_relocate_section): Call it, in place of RELOC_AGAINST_DISCARDED_SECTION. * elf-m10200.c (mn10200_elf_relocate_section): Update arguments to RELOC_AGAINST_DISCARDED_SECTION. * elf-m10300.c (mn10300_elf_relocate_section): Likewise. * elf32-arm.c (elf32_arm_relocate_section): Likewise. * elf32-avr.c (elf32_avr_relocate_section): Likewise. * elf32-bfin.c (bfin_relocate_section): Likewise. (bfinfdpic_relocate_section): Likewise. * elf32-cr16.c (elf32_cr16_relocate_section): Likewise. * elf32-cr16c.c (elf32_cr16c_relocate_section): Likewise. * elf32-cris.c (cris_elf_relocate_section): Likewise. * elf32-crx.c (elf32_crx_relocate_section): Likewise. * elf32-d10v.c (elf32_d10v_relocate_section): Likewise. * elf32-epiphany.c (epiphany_elf_relocate_section): Likewise. * elf32-fr30.c (fr30_elf_relocate_section): Likewise. * elf32-frv.c (elf32_frv_relocate_section): Likewise. * elf32-h8300.c (elf32_h8_relocate_section): Likewise. * elf32-hppa.c (elf32_hppa_relocate_section): Likewise. * elf32-i370.c (i370_elf_relocate_section): Likewise. * elf32-i386.c (elf_i386_relocate_section): Likewise. * elf32-i860.c (elf32_i860_relocate_section): Likewise. * elf32-ip2k.c (ip2k_elf_relocate_section): Likewise. * elf32-iq2000.c (iq2000_elf_relocate_section): Likewise. * elf32-lm32.c (lm32_elf_relocate_section): Likewise. * elf32-m32c.c (m32c_elf_relocate_section): Likewise. * elf32-m32r.c (m32r_elf_relocate_section): Likewise. * elf32-m68hc1x.c (elf32_m68hc11_relocate_section): Likewise. * elf32-m68k.c (elf_m68k_relocate_section): Likewise. * elf32-mcore.c (mcore_elf_relocate_section): Likewise. * elf32-mep.c (mep_elf_relocate_section): Likewise. * elf32-moxie.c (moxie_elf_relocate_section): Likewise. * elf32-msp430.c (elf32_msp430_relocate_section): Likewise. * elf32-mt.c (mt_elf_relocate_section): Likewise. * elf32-openrisc.c (openrisc_elf_relocate_section): Likewise. * elf32-ppc.c (ppc_elf_relocate_section): Likewise. * elf32-rl78.c (rl78_elf_relocate_section): Likewise. * elf32-rx.c (rx_elf_relocate_section): Likewise. * elf32-s390.c (elf_s390_relocate_section): Likewise. * elf32-score.c (s3_bfd_score_elf_relocate_section): Likewise. * elf32-score7.c (s7_bfd_score_elf_relocate_section): Likewise. * elf32-sh.c (sh_elf_relocate_section): Likewise. * elf32-spu.c (spu_elf_relocate_section): Likewise. * elf32-tic6x.c (elf32_tic6x_relocate_section): Likewise. * elf32-tilepro.c (tilepro_elf_relocate_section): Likewise. * elf32-v850.c (v850_elf_relocate_section): Likewise. * elf32-vax.c (elf_vax_relocate_section): Likewise. * elf32-xc16x.c (elf32_xc16x_relocate_section): Likewise. * elf32-xstormy16.c (xstormy16_elf_relocate_section): Likewise. * elf32-xtensa.c (elf_xtensa_relocate_section): Likewise. * elf64-alpha.c (elf64_alpha_relocate_section_r): Likewise. (elf64_alpha_relocate_section): Likewise. * elf64-hppa.c (elf64_hppa_relocate_section): Likewise. * elf64-mmix.c (mmix_elf_relocate_section): Likewise. * elf64-ppc.c (ppc64_elf_relocate_section): Likewise. * elf64-s390.c (elf_s390_relocate_section): Likewise. * elf64-sh64.c (sh_elf64_relocate_section): Likewise. * elf64-x86-64.c (elf_x86_64_relocate_section): Likewise. * elfnn-ia64.c (elfNN_ia64_relocate_section): Likewise. * elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise. * elfxx-tilegx.c (tilegx_elf_relocate_section): Likewise.
609 lines
19 KiB
C
609 lines
19 KiB
C
/* Adapteva epiphany specific support for 32-bit ELF
|
|
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2011, 2012
|
|
Free Software Foundation, Inc.
|
|
Contributed by Embecosm on behalf of Adapteva, 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/epiphany.h"
|
|
#include "libiberty.h"
|
|
|
|
/* Struct used to pass miscellaneous paramaters which
|
|
helps to avoid overly long parameter lists. */
|
|
struct misc
|
|
{
|
|
Elf_Internal_Shdr * symtab_hdr;
|
|
Elf_Internal_Rela * irelbase;
|
|
bfd_byte * contents;
|
|
Elf_Internal_Sym * isymbuf;
|
|
};
|
|
|
|
struct epiphany_opcode
|
|
{
|
|
unsigned short opcode;
|
|
unsigned short mask;
|
|
};
|
|
|
|
static bfd_boolean epiphany_relaxed = FALSE;
|
|
|
|
/* Relocation tables. */
|
|
static reloc_howto_type epiphany_elf_howto_table [] =
|
|
{
|
|
#define AHOW(t,rs,s,bs,pr,bp,co,name,sm,dm) \
|
|
HOWTO(t, /* type */ \
|
|
rs, /* rightshift */ \
|
|
s, /* size (0 = byte, 1 = short, 2 = long) */ \
|
|
bs, /* bitsize */ \
|
|
pr, /* pc_relative */ \
|
|
bp, /* bitpos */ \
|
|
co, /* complain_on_overflow */ \
|
|
bfd_elf_generic_reloc,/* special_function */ \
|
|
name, /* name */ \
|
|
FALSE, /* partial_inplace */ \
|
|
sm, /* src_mask */ \
|
|
dm, /* dst_mask */ \
|
|
pr) /* pcrel_offset */
|
|
|
|
/* This reloc does nothing. */
|
|
AHOW (R_EPIPHANY_NONE, 0, 0,32, FALSE, 0, complain_overflow_dont, "R_EPIPHANY_NONE", 0, 0),
|
|
|
|
/* 8 bit absolute (not likely) */
|
|
AHOW (R_EPIPHANY_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_8", 0x000000ff, 0x000000ff),
|
|
/* 16 bit absolute */
|
|
AHOW (R_EPIPHANY_16, 0, 1,16, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_16", 0x0000ffff, 0x00ff1fe0),
|
|
/* A 32 bit absolute relocation. */
|
|
AHOW (R_EPIPHANY_32, 0, 2,32, FALSE, 0, complain_overflow_dont, "R_EPIPHANY_32", 0xffffffff, 0xffffffff),
|
|
|
|
/* 8 bit relative relocation */
|
|
HOWTO ( R_EPIPHANY_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
|
|
/* 16 bit relative relocation */
|
|
HOWTO ( R_EPIPHANY_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
|
|
/* 32 bit relative relocation */
|
|
HOWTO ( R_EPIPHANY_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
|
|
|
|
/* 8 bit pc-relative relocation */
|
|
AHOW (R_EPIPHANY_SIMM8, 1, 0, 8, TRUE, 8, complain_overflow_signed, "R_EPIPHANY_SIMM8", 0x000000ff, 0x0000ff00),
|
|
/* 24 bit pc-relative relocation */
|
|
AHOW (R_EPIPHANY_SIMM24, 1, 2,24, TRUE, 8, complain_overflow_signed, "R_EPIPHANY_SIMM24", 0x00ffffff, 0xffffff00),
|
|
|
|
/* %HIGH(EA) */
|
|
AHOW (R_EPIPHANY_HIGH, 0, 2,16, FALSE, 0, complain_overflow_dont, "R_EPIPHANY_HIGH", 0x0ff01fe0, 0x0ff01fe0),
|
|
|
|
/* %LOW(EA) */
|
|
AHOW (R_EPIPHANY_LOW, 0, 2,16, FALSE, 0, complain_overflow_dont, "R_EPIPHANY_LOW", 0x0ff01fe0, 0x0ff01fe0),
|
|
|
|
/* simm11 */
|
|
AHOW (R_EPIPHANY_SIMM11, 0, 2,11, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_SIMM11", 0x00ff0380, 0x00ff0380),
|
|
/* imm12 - sign-magnitude */
|
|
AHOW (R_EPIPHANY_IMM11, 0, 2,11, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_IMM12", 0x00ff0380, 0x00ff0380),
|
|
/* imm8 */
|
|
AHOW (R_EPIPHANY_IMM8, 0, 1, 8, FALSE, 8, complain_overflow_signed, "R_EPIPHANY_IMM8", 0x0000ff00, 0x0000ff00)
|
|
|
|
|
|
};
|
|
#undef AHOW
|
|
|
|
/* Map BFD reloc types to EPIPHANY ELF reloc types. */
|
|
|
|
static reloc_howto_type *
|
|
epiphany_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
/* Note that the epiphany_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/epiphany.h. */
|
|
|
|
switch (code)
|
|
{
|
|
case BFD_RELOC_NONE:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_NONE];
|
|
|
|
case BFD_RELOC_EPIPHANY_SIMM8:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM8];
|
|
case BFD_RELOC_EPIPHANY_SIMM24:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM24];
|
|
|
|
case BFD_RELOC_8_PCREL:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_8_PCREL];
|
|
case BFD_RELOC_16_PCREL:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_16_PCREL];
|
|
case BFD_RELOC_32_PCREL:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_32_PCREL];
|
|
|
|
case BFD_RELOC_8:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_8];
|
|
case BFD_RELOC_16:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_16];
|
|
case BFD_RELOC_32:
|
|
return &epiphany_elf_howto_table[ (int) R_EPIPHANY_32];
|
|
|
|
case BFD_RELOC_EPIPHANY_HIGH:
|
|
return & epiphany_elf_howto_table[ (int) R_EPIPHANY_HIGH];
|
|
case BFD_RELOC_EPIPHANY_LOW:
|
|
return & epiphany_elf_howto_table[ (int) R_EPIPHANY_LOW];
|
|
|
|
case BFD_RELOC_EPIPHANY_SIMM11:
|
|
return & epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM11];
|
|
case BFD_RELOC_EPIPHANY_IMM11:
|
|
return & epiphany_elf_howto_table[ (int) R_EPIPHANY_IMM11];
|
|
|
|
case BFD_RELOC_EPIPHANY_IMM8:
|
|
return & epiphany_elf_howto_table[ (int) R_EPIPHANY_IMM8];
|
|
|
|
default:
|
|
/* Pacify gcc -Wall. */
|
|
return NULL;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
epiphany_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE (epiphany_elf_howto_table); i++)
|
|
if (epiphany_elf_howto_table[i].name != NULL
|
|
&& strcasecmp (epiphany_elf_howto_table[i].name, r_name) == 0)
|
|
return &epiphany_elf_howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#define PAGENO(ABSADDR) ((ABSADDR) & 0xFFFFC000)
|
|
#define BASEADDR(SEC) ((SEC)->output_section->vma + (SEC)->output_offset)
|
|
|
|
/* This function handles relaxing for the epiphany.
|
|
Dummy placeholder for future optimizations. */
|
|
|
|
static bfd_boolean
|
|
epiphany_elf_relax_section (bfd *abfd, asection *sec,
|
|
struct bfd_link_info *link_info,
|
|
bfd_boolean *again)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
Elf_Internal_Rela *internal_relocs;
|
|
bfd_byte *contents = NULL;
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
|
static asection * first_section = NULL;
|
|
static unsigned long search_addr;
|
|
static unsigned long page_start = 0;
|
|
static unsigned long page_end = 0;
|
|
static unsigned int pass = 0;
|
|
static bfd_boolean new_pass = FALSE;
|
|
static bfd_boolean changed = FALSE;
|
|
struct misc misc ATTRIBUTE_UNUSED;
|
|
asection *stab;
|
|
|
|
/* Assume nothing changes. */
|
|
*again = FALSE;
|
|
|
|
if (first_section == NULL)
|
|
{
|
|
epiphany_relaxed = TRUE;
|
|
first_section = sec;
|
|
}
|
|
|
|
if (first_section == sec)
|
|
{
|
|
pass++;
|
|
new_pass = TRUE;
|
|
}
|
|
|
|
/* We don't have to do anything for a relocatable link,
|
|
if this section does not have relocs, or if this is
|
|
not a code section. */
|
|
if (link_info->relocatable
|
|
|| (sec->flags & SEC_RELOC) == 0
|
|
|| sec->reloc_count == 0
|
|
|| (sec->flags & SEC_CODE) == 0)
|
|
return TRUE;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
|
|
internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
|
|
link_info->keep_memory);
|
|
if (internal_relocs == NULL)
|
|
goto error_return;
|
|
|
|
/* Make sure the stac.rela stuff gets read in. */
|
|
stab = bfd_get_section_by_name (abfd, ".stab");
|
|
|
|
if (stab)
|
|
{
|
|
/* So stab does exits. */
|
|
Elf_Internal_Rela * irelbase ATTRIBUTE_UNUSED;
|
|
|
|
irelbase = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL,
|
|
link_info->keep_memory);
|
|
}
|
|
|
|
/* Get section contents cached copy if it exists. */
|
|
if (contents == NULL)
|
|
{
|
|
/* Get cached copy if it exists. */
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
else
|
|
{
|
|
/* Go get them off disk. */
|
|
if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
|
goto error_return;
|
|
}
|
|
}
|
|
|
|
/* Read this BFD's symbols cached copy if it exists. */
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
|
{
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (isymbuf == NULL)
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (isymbuf == NULL)
|
|
goto error_return;
|
|
}
|
|
|
|
misc.symtab_hdr = symtab_hdr;
|
|
misc.isymbuf = isymbuf;
|
|
misc.irelbase = internal_relocs;
|
|
misc.contents = contents;
|
|
|
|
/* This is where all the relaxation actually get done. */
|
|
if ((pass == 1) || (new_pass && !changed))
|
|
{
|
|
/* On the first pass we simply search for the lowest page that
|
|
we havn't relaxed yet. Note that the pass count is reset
|
|
each time a page is complete in order to move on to the next page.
|
|
If we can't find any more pages then we are finished. */
|
|
if (new_pass)
|
|
{
|
|
pass = 1;
|
|
new_pass = FALSE;
|
|
changed = TRUE; /* Pre-initialize to break out of pass 1. */
|
|
search_addr = 0xFFFFFFFF;
|
|
}
|
|
|
|
if ((BASEADDR (sec) + sec->size < search_addr)
|
|
&& (BASEADDR (sec) + sec->size > page_end))
|
|
{
|
|
if (BASEADDR (sec) <= page_end)
|
|
search_addr = page_end + 1;
|
|
else
|
|
search_addr = BASEADDR (sec);
|
|
|
|
/* Found a page => more work to do. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (new_pass)
|
|
{
|
|
new_pass = FALSE;
|
|
changed = FALSE;
|
|
page_start = PAGENO (search_addr);
|
|
page_end = page_start | 0x00003FFF;
|
|
}
|
|
|
|
/* Only process sections in range. */
|
|
if ((BASEADDR (sec) + sec->size >= page_start)
|
|
&& (BASEADDR (sec) <= page_end))
|
|
{
|
|
#if 0
|
|
if (!epiphany_elf_relax_section_page (abfd, sec, &changed, &misc,
|
|
page_start, page_end))
|
|
#endif
|
|
return FALSE;
|
|
}
|
|
*again = TRUE;
|
|
}
|
|
|
|
/* Perform some house keeping after relaxing the section. */
|
|
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
{
|
|
if (! link_info->keep_memory)
|
|
free (isymbuf);
|
|
else
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
}
|
|
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
{
|
|
if (! link_info->keep_memory)
|
|
free (contents);
|
|
else
|
|
{
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
}
|
|
}
|
|
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
|
|
return TRUE;
|
|
|
|
error_return:
|
|
if (isymbuf != NULL
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
free (isymbuf);
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
free (contents);
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Set the howto pointer for a EPIPHANY ELF reloc. */
|
|
|
|
static void
|
|
epiphany_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
|
|
arelent * cache_ptr,
|
|
Elf_Internal_Rela * dst)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
|
cache_ptr->howto = & epiphany_elf_howto_table [r_type];
|
|
}
|
|
|
|
/* Perform a single relocation.
|
|
By default we use the standard BFD routines. */
|
|
|
|
static bfd_reloc_status_type
|
|
epiphany_final_link_relocate (reloc_howto_type * howto,
|
|
bfd * input_bfd,
|
|
asection * input_section,
|
|
bfd_byte * contents,
|
|
Elf_Internal_Rela * rel,
|
|
bfd_vma relocation)
|
|
{
|
|
switch (howto->type)
|
|
{
|
|
/* Handle 16 bit immediates. */
|
|
case R_EPIPHANY_HIGH:
|
|
relocation += rel->r_addend;
|
|
relocation >>= 16;
|
|
goto common;
|
|
|
|
case R_EPIPHANY_LOW:
|
|
relocation += rel->r_addend;
|
|
common:
|
|
relocation = ((relocation & 0xff00L) << 12)
|
|
| ((relocation & 0x00ffL) << 5);
|
|
/* Sanity check the address. */
|
|
if (rel->r_offset > bfd_get_section_limit (input_bfd, input_section))
|
|
return bfd_reloc_outofrange;
|
|
|
|
return _bfd_relocate_contents (howto, input_bfd, relocation,
|
|
contents + rel->r_offset);
|
|
|
|
case R_EPIPHANY_SIMM11:
|
|
relocation += rel->r_addend;
|
|
/* Check signed overflow. */
|
|
if ((int)relocation > 1023 || (int)relocation < -1024)
|
|
return bfd_reloc_outofrange;
|
|
goto disp11;
|
|
|
|
case R_EPIPHANY_IMM11:
|
|
relocation += rel->r_addend;
|
|
if ((unsigned int) relocation > 0x7ff)
|
|
return bfd_reloc_outofrange;
|
|
disp11:
|
|
relocation = ((relocation & 7) << 5)
|
|
|| ((relocation & 0x7f8 ) << 13);
|
|
return _bfd_relocate_contents (howto, input_bfd, relocation,
|
|
contents + rel->r_offset);
|
|
|
|
/* Pass others through. */
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Only install relocation if above tests did not disqualify it. */
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, rel->r_addend);
|
|
}
|
|
|
|
/* Relocate an EPIPHANY 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. */
|
|
|
|
static bfd_boolean
|
|
epiphany_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 = ELF32_R_TYPE (rel->r_info);
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
howto = epiphany_elf_howto_table + ELF32_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);
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean warned ATTRIBUTE_UNUSED;
|
|
bfd_boolean unresolved_reloc ATTRIBUTE_UNUSED;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
|
|
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 (info->relocatable)
|
|
continue;
|
|
|
|
/* Finally, the sole EPIPHANY-specific part. */
|
|
r = epiphany_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel, relocation);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char * msg = NULL;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
r = 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:
|
|
r = 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;
|
|
|
|
/* This is how epiphany_final_link_relocate tells us of a
|
|
non-kosher reference between insn & data address spaces. */
|
|
case bfd_reloc_notsupported:
|
|
if (sym != NULL) /* Only if it's not an unresolved symbol. */
|
|
msg = _("unsupported relocation between data/insn address spaces");
|
|
break;
|
|
|
|
case bfd_reloc_dangerous:
|
|
msg = _("internal error: dangerous relocation");
|
|
break;
|
|
|
|
default:
|
|
msg = _("internal error: unknown error");
|
|
break;
|
|
}
|
|
|
|
if (msg)
|
|
r = info->callbacks->warning
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
|
|
|
if (! r)
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* We only have a little-endian target. */
|
|
#define TARGET_LITTLE_SYM bfd_elf32_epiphany_vec
|
|
#define TARGET_LITTLE_NAME "elf32-epiphany"
|
|
|
|
#define ELF_ARCH bfd_arch_epiphany
|
|
#define ELF_MACHINE_CODE EM_ADAPTEVA_EPIPHANY
|
|
|
|
#define ELF_MAXPAGESIZE 0x8000 /* No pages on the EPIPHANY. */
|
|
|
|
#define elf_info_to_howto_rel NULL
|
|
#define elf_info_to_howto epiphany_info_to_howto_rela
|
|
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_rela_normal 1
|
|
#define elf_backend_relocate_section epiphany_elf_relocate_section
|
|
|
|
#define elf_symbol_leading_char '_'
|
|
#define bfd_elf32_bfd_reloc_type_lookup epiphany_reloc_type_lookup
|
|
#define bfd_elf32_bfd_reloc_name_lookup epiphany_reloc_name_lookup
|
|
#define bfd_elf32_bfd_relax_section epiphany_elf_relax_section
|
|
|
|
#include "elf32-target.h"
|