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authorDavid Edelsohn <dje.gcc@gmail.com>1995-12-03 23:29:09 +0000
committerDavid Edelsohn <dje.gcc@gmail.com>1995-12-03 23:29:09 +0000
commit361e8876a0e4fafbae967472a257b626838e4e21 (patch)
tree797e512ef6b55eaee3f4c015b2011e3d46291627 /bfd/aout-arm.c
parent3554987a2f9bf4c40406a5141f9e24b6a3dfdb91 (diff)
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* aout-arm.c (MY_swap_std_reloc_out): Use KEEPIT to get the symbol
index, don't call stoi.
Diffstat (limited to 'bfd/aout-arm.c')
-rw-r--r--bfd/aout-arm.c548
1 files changed, 548 insertions, 0 deletions
diff --git a/bfd/aout-arm.c b/bfd/aout-arm.c
new file mode 100644
index 0000000..743ec95
--- /dev/null
+++ b/bfd/aout-arm.c
@@ -0,0 +1,548 @@
+/* BFD back-end for raw ARM a.out binaries.
+ Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+ Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
+
+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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#define N_TXTADDR(x) \
+ ((N_MAGIC(x) == NMAGIC) ? 0x8000 : \
+ (N_MAGIC(x) != ZMAGIC) ? 0 : \
+ (N_SHARED_LIB(x)) ? ((x).a_entry & ~(TARGET_PAGE_SIZE - 1)) : \
+ TEXT_START_ADDR)
+
+#define TEXT_START_ADDR 0x8000
+#define TARGET_PAGE_SIZE 0x8000
+#define SEGMENT_SIZE TARGET_PAGE_SIZE
+#define DEFAULT_ARCH bfd_arch_arm
+
+#define MY(OP) CAT(aoutarm_,OP)
+#define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \
+ (((x).a_info & ~006000) != OMAGIC) && \
+ ((x).a_info != NMAGIC))
+#define N_MAGIC(x) ((x).a_info & ~07200)
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "assert.h"
+
+#define MYARM(OP) CAT(aoutarm_,OP)
+reloc_howto_type *MYARM(bfd_reloc_type_lookup)
+ PARAMS((bfd *, bfd_reloc_code_real_type));
+static boolean MYARM(write_object_contents) PARAMS((bfd *));
+
+/* Avoid multiple defininitions from aoutx if supporting standarad a.out
+ as well as our own. */
+#define NAME(x,y) CAT3(aoutarm,_32_,y)
+
+#define MY_bfd_reloc_type_lookup aoutarm_bfd_reloc_type_lookup
+
+#include "libaout.h"
+#include "aout/aout64.h"
+
+static bfd_reloc_status_type
+MY(fix_pcrel_26_done) PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+
+static bfd_reloc_status_type
+MY(fix_pcrel_26) PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+static void MY(swap_std_reloc_in) PARAMS ((bfd *, struct reloc_std_external *,
+ arelent *, asymbol **,
+ bfd_size_type));
+void MY(swap_std_reloc_out) PARAMS ((bfd *, arelent *,
+ struct reloc_std_external *));
+
+reloc_howto_type MY(howto_table)[] =
+{
+ /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask
+ pcdone */
+ HOWTO (0, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "8", true,
+ 0x000000ff, 0x000000ff, false),
+ HOWTO (1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16", true,
+ 0x0000ffff, 0x0000ffff, false),
+ HOWTO (2, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "32", true,
+ 0xffffffff, 0xffffffff, false),
+ HOWTO (3, 2, 2, 26, true, 0, complain_overflow_signed, MY(fix_pcrel_26),
+ "ARM26", true, 0x00ffffff, 0x00ffffff, true),
+ HOWTO (4, 0, 0, 8, true, 0, complain_overflow_signed, 0, "DISP8", true,
+ 0x000000ff, 0x000000ff, true),
+ HOWTO (5, 0, 1, 16, true, 0, complain_overflow_signed, 0, "DISP16", true,
+ 0x0000ffff, 0x0000ffff, true),
+ HOWTO (6, 0, 2, 32, true, 0, complain_overflow_signed, 0, "DISP32", true,
+ 0xffffffff, 0xffffffff, true),
+ HOWTO (7, 2, 2, 26, false, 0, complain_overflow_signed,
+ MY(fix_pcrel_26_done), "ARM26D", true, 0x0, 0x0,
+ false),
+ {-1},
+ HOWTO (9, 0, -1, 16, false, 0, complain_overflow_bitfield, 0, "NEG16", true,
+ 0x0000ffff, 0x0000ffff, false),
+ HOWTO (10, 0, -2, 32, false, 0, complain_overflow_bitfield, 0, "NEG32", true,
+ 0xffffffff, 0xffffffff, false)
+};
+
+#define RELOC_ARM_BITS_NEG_BIG ((unsigned int) 0x08)
+#define RELOC_ARM_BITS_NEG_LITTLE ((unsigned int) 0x10)
+
+reloc_howto_type *
+MY(reloc_howto)(abfd, rel, r_index, r_extern, r_pcrel)
+ bfd *abfd;
+ struct reloc_std_external *rel;
+ int *r_index;
+ int *r_extern;
+ int *r_pcrel;
+{
+ unsigned int r_length;
+ unsigned int r_pcrel_done;
+ unsigned int r_neg;
+ int index;
+
+ *r_pcrel = 0;
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ *r_index = ((rel->r_index[0] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[2]);
+ *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
+ r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
+ r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_BIG));
+ r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
+ >> RELOC_STD_BITS_LENGTH_SH_BIG);
+ }
+ else
+ {
+ *r_index = ((rel->r_index[2] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[0]);
+ *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
+ r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
+ r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_LITTLE));
+ r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
+ >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
+ }
+ index = r_length + 4 * r_pcrel_done + 8 * r_neg;
+ if (index == 3)
+ *r_pcrel = 1;
+
+ return MY(howto_table) + index;
+}
+
+#define MY_reloc_howto(BFD, REL, IN, EX, PC) \
+ MY(reloc_howto) (BFD, REL, &IN, &EX, &PC)
+
+void
+MY(put_reloc)(abfd, r_extern, r_index, value, howto, reloc)
+ bfd *abfd;
+ int r_extern;
+ int r_index;
+ long value;
+ reloc_howto_type *howto;
+ struct reloc_std_external *reloc;
+{
+ unsigned int r_length;
+ int r_pcrel;
+ int r_neg;
+
+ PUT_WORD (abfd, value, reloc->r_address);
+ r_length = howto->size ; /* Size as a power of two */
+
+ /* Special case for branch relocations. */
+ if (howto->type == 3 || howto->type == 7)
+ r_length = 3;
+
+ r_pcrel = howto->type & 4; /* PC Relative done? */
+ r_neg = howto->type & 8; /* Negative relocation */
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ reloc->r_index[0] = r_index >> 16;
+ reloc->r_index[1] = r_index >> 8;
+ reloc->r_index[2] = r_index;
+ reloc->r_type[0] =
+ ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
+ | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
+ | (r_neg ? RELOC_ARM_BITS_NEG_BIG : 0)
+ | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
+ }
+ else
+ {
+ reloc->r_index[2] = r_index >> 16;
+ reloc->r_index[1] = r_index >> 8;
+ reloc->r_index[0] = r_index;
+ reloc->r_type[0] =
+ ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
+ | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
+ | (r_neg ? RELOC_ARM_BITS_NEG_LITTLE : 0)
+ | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
+ }
+}
+
+#define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
+ MY(put_reloc)(BFD, EXT, IDX, VAL, HOWTO, RELOC)
+
+void
+MY(relocatable_reloc)(howto, abfd, reloc, amount, r_addr)
+ reloc_howto_type *howto;
+ bfd *abfd;
+ struct reloc_std_external *reloc;
+ bfd_vma *amount;
+ bfd_vma r_addr;
+{
+ if (howto->type == 3)
+ {
+ if (reloc->r_type[0]
+ & (abfd->xvec->header_byteorder_big_p
+ ? RELOC_STD_BITS_EXTERN_BIG : RELOC_STD_BITS_EXTERN_LITTLE))
+ {
+ /* The reloc is still external, so don't modify anything. */
+ *amount = 0;
+ }
+ else
+ {
+ *amount -= r_addr;
+ /* Change the r_pcrel value -- on the ARM, this bit is set once the
+ relocation is done. */
+ if (abfd->xvec->header_byteorder_big_p)
+ reloc->r_type[0] |= RELOC_STD_BITS_PCREL_BIG;
+ else
+ reloc->r_type[0] |= RELOC_STD_BITS_PCREL_LITTLE;
+ }
+ }
+ else if (howto->type == 7)
+ *amount = 0;
+}
+
+#define MY_relocatable_reloc(HOW, BFD, REL, AMOUNT, ADDR) \
+ MY(relocatable_reloc)(HOW, BFD, REL, &(AMOUNT), ADDR)
+
+static bfd_reloc_status_type
+MY(fix_pcrel_26_done) (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* This is dead simple at present. */
+ return bfd_reloc_ok;
+}
+
+static bfd_reloc_status_type
+MY(fix_pcrel_26) (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma relocation;
+ bfd_size_type addr = reloc_entry->address;
+ long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
+ bfd_reloc_status_type flag = bfd_reloc_ok;
+
+ /* If this is an undefined symbol, return error */
+ if (symbol->section == &bfd_und_section
+ && (symbol->flags & BSF_WEAK) == 0)
+ return output_bfd ? bfd_reloc_ok : bfd_reloc_undefined;
+
+ /* If the sections are different, and we are doing a partial relocation,
+ just ignore it for now. */
+ if (symbol->section->name != input_section->name
+ && output_bfd != (bfd *)NULL)
+ return bfd_reloc_ok;
+
+ relocation = (target & 0x00ffffff) << 2;
+ relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */
+ relocation += symbol->value;
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+ relocation -= input_section->output_section->vma;
+ relocation -= input_section->output_offset;
+ relocation -= addr;
+ if (relocation & 3)
+ return bfd_reloc_overflow;
+
+ /* Check for overflow */
+ if (relocation & 0x02000000)
+ {
+ if ((relocation & ~0x03ffffff) != ~0x03ffffff)
+ flag = bfd_reloc_overflow;
+ }
+ else if (relocation & ~0x03ffffff)
+ flag = bfd_reloc_overflow;
+
+ target &= ~0x00ffffff;
+ target |= (relocation >> 2) & 0x00ffffff;
+ bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
+
+ /* Now the ARM magic... Change the reloc type so that it is marked as done.
+ Strictly this is only necessary if we are doing a partial relocation. */
+ reloc_entry->howto = &MY(howto_table)[7];
+
+ return flag;
+}
+
+reloc_howto_type *
+MY(bfd_reloc_type_lookup)(abfd,code)
+ bfd *abfd;
+ bfd_reloc_code_real_type code;
+{
+#define ASTD(i,j) case i: return &MY(howto_table)[j]
+ if (code == BFD_RELOC_CTOR)
+ switch (bfd_get_arch_info (abfd)->bits_per_address)
+ {
+ case 32:
+ code = BFD_RELOC_32;
+ break;
+ default: return (CONST struct reloc_howto_struct *) 0;
+ }
+
+ switch (code)
+ {
+ ASTD (BFD_RELOC_16, 1);
+ ASTD (BFD_RELOC_32, 2);
+ ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
+ ASTD (BFD_RELOC_8_PCREL, 4);
+ ASTD (BFD_RELOC_16_PCREL, 5);
+ ASTD (BFD_RELOC_32_PCREL, 6);
+ default: return (CONST struct reloc_howto_struct *) 0;
+ }
+}
+
+#define MY_swap_std_reloc_in MY(swap_std_reloc_in)
+#define MY_swap_std_reloc_out MY(swap_std_reloc_out)
+#define MY_get_section_contents _bfd_generic_get_section_contents
+/* #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create */
+/* #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols */
+/* #define MY_bfd_final_link _bfd_generic_final_link */
+
+#include "aoutx.h"
+
+static void
+MY_swap_std_reloc_in (abfd, bytes, cache_ptr, symbols, symcount)
+ bfd *abfd;
+ struct reloc_std_external *bytes;
+ arelent *cache_ptr;
+ asymbol **symbols;
+ bfd_size_type symcount;
+{
+ int r_index;
+ int r_extern;
+ unsigned int r_length;
+ int r_pcrel;
+ struct aoutdata *su = &(abfd->tdata.aout_data->a);
+
+ cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
+
+ cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel);
+
+ MOVE_ADDRESS (0);
+}
+
+void
+MY_swap_std_reloc_out (abfd, g, natptr)
+ bfd *abfd;
+ arelent *g;
+ struct reloc_std_external *natptr;
+{
+ int r_index;
+ asymbol *sym = *(g->sym_ptr_ptr);
+ int r_extern;
+ int r_length;
+ int r_pcrel;
+ int r_neg = 0; /* Negative relocs use the BASEREL bit. */
+ asection *output_section = sym->section->output_section;
+
+ PUT_WORD(abfd, g->address, natptr->r_address);
+
+ r_length = g->howto->size ; /* Size as a power of two */
+ if (r_length < 0)
+ {
+ r_length = -r_length;
+ r_neg = 1;
+ }
+
+ r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
+
+ /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the
+ relocation has been done already (Only for the 26-bit one I think)???!!!
+ */
+
+ if (g->howto->type == 3)
+ {
+ r_length = 3;
+ r_pcrel = 0;
+ }
+ else if (g->howto->type == 7)
+ {
+ r_length = 3;
+ r_pcrel = 1;
+ }
+
+
+#if 0
+ /* For a standard reloc, the addend is in the object file. */
+ r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
+#endif
+
+ /* name was clobbered by aout_write_syms to be symbol index */
+
+ /* If this relocation is relative to a symbol then set the
+ r_index to the symbols index, and the r_extern bit.
+
+ Absolute symbols can come in in two ways, either as an offset
+ from the abs section, or as a symbol which has an abs value.
+ check for that here
+ */
+
+ if (bfd_is_com_section (output_section)
+ || output_section == &bfd_abs_section
+ || output_section == &bfd_und_section)
+ {
+ if (bfd_abs_section.symbol == sym)
+ {
+ /* Whoops, looked like an abs symbol, but is really an offset
+ from the abs section */
+ r_index = 0;
+ r_extern = 0;
+ }
+ else
+ {
+ /* Fill in symbol */
+ r_extern = 1;
+ r_index = (*(g->sym_ptr_ptr))->KEEPIT;
+ }
+ }
+ else
+ {
+ /* Just an ordinary section */
+ r_extern = 0;
+ r_index = output_section->target_index;
+ }
+
+ /* now the fun stuff */
+ if (abfd->xvec->header_byteorder_big_p != false)
+ {
+ natptr->r_index[0] = r_index >> 16;
+ natptr->r_index[1] = r_index >> 8;
+ natptr->r_index[2] = r_index;
+ natptr->r_type[0] =
+ ( (r_extern ? RELOC_STD_BITS_EXTERN_BIG: 0)
+ | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG: 0)
+ | (r_neg ? RELOC_ARM_BITS_NEG_BIG: 0)
+ | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
+ }
+ else
+ {
+ natptr->r_index[2] = r_index >> 16;
+ natptr->r_index[1] = r_index >> 8;
+ natptr->r_index[0] = r_index;
+ natptr->r_type[0] =
+ ( (r_extern ? RELOC_STD_BITS_EXTERN_LITTLE: 0)
+ | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE: 0)
+ | (r_neg ? RELOC_ARM_BITS_NEG_LITTLE: 0)
+ | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
+ }
+}
+
+#define MY_BFD_TARGET
+
+#include "aout-target.h"
+
+const bfd_target aout_arm_little_vec =
+{
+ "a.out-arm-little", /* name */
+ bfd_target_aout_flavour,
+ false, /* target byte order (little) */
+ false, /* target headers byte order (little) */
+ (HAS_RELOC | EXEC_P | /* object flags */
+ HAS_LINENO | HAS_DEBUG |
+ HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
+ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
+ MY_symbol_leading_char,
+ AR_PAD_CHAR, /* ar_pad_char */
+ 15, /* ar_max_namelen */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
+ {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
+ bfd_generic_archive_p, MY_core_file_p},
+ {bfd_false, MY_mkobject, /* bfd_set_format */
+ _bfd_generic_mkarchive, bfd_false},
+ {bfd_false, MY_write_object_contents, /* bfd_write_contents */
+ _bfd_write_archive_contents, bfd_false},
+
+ BFD_JUMP_TABLE_GENERIC (MY),
+ BFD_JUMP_TABLE_COPY (MY),
+ BFD_JUMP_TABLE_CORE (MY),
+ BFD_JUMP_TABLE_ARCHIVE (MY),
+ BFD_JUMP_TABLE_SYMBOLS (MY),
+ BFD_JUMP_TABLE_RELOCS (MY),
+ BFD_JUMP_TABLE_WRITE (MY),
+ BFD_JUMP_TABLE_LINK (MY),
+ BFD_JUMP_TABLE_DYNAMIC (MY),
+
+ (PTR) MY_backend_data,
+};
+
+const bfd_target aout_arm_big_vec =
+{
+ "a.out-arm-big", /* name */
+ bfd_target_aout_flavour,
+ true, /* target byte order (big) */
+ true, /* target headers byte order (big) */
+ (HAS_RELOC | EXEC_P | /* object flags */
+ HAS_LINENO | HAS_DEBUG |
+ HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
+ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
+ MY_symbol_leading_char,
+ AR_PAD_CHAR, /* ar_pad_char */
+ 15, /* ar_max_namelen */
+ bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+ bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+ bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
+ bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+ bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+ bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
+ {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
+ bfd_generic_archive_p, MY_core_file_p},
+ {bfd_false, MY_mkobject, /* bfd_set_format */
+ _bfd_generic_mkarchive, bfd_false},
+ {bfd_false, MY_write_object_contents, /* bfd_write_contents */
+ _bfd_write_archive_contents, bfd_false},
+
+ BFD_JUMP_TABLE_GENERIC (MY),
+ BFD_JUMP_TABLE_COPY (MY),
+ BFD_JUMP_TABLE_CORE (MY),
+ BFD_JUMP_TABLE_ARCHIVE (MY),
+ BFD_JUMP_TABLE_SYMBOLS (MY),
+ BFD_JUMP_TABLE_RELOCS (MY),
+ BFD_JUMP_TABLE_WRITE (MY),
+ BFD_JUMP_TABLE_LINK (MY),
+ BFD_JUMP_TABLE_DYNAMIC (MY),
+
+ (PTR) MY_backend_data,
+};