--- /dev/null
+/* M32R-specific support for 32-bit ELF.
+ Copyright (C) 1996, 1997 Free Software Foundation, 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 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. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/m32r.h"
+
+static bfd_reloc_status_type m32r_elf_10_pcrel_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type m32r_elf_hi16_slo_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
+ PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
+static void m32r_info_to_howto_rel
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
+
+/* Use REL instead of RELA to save space. */
+#define USE_REL
+
+static reloc_howto_type elf_m32r_howto_table[] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_M32R_NONE, /* 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_M32R_NONE", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A 16 bit absolute relocation. */
+ HOWTO (R_M32R_16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_16", /* name */
+ false, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A 32 bit absolute relocation. */
+ HOWTO (R_M32R_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_M32R_32", /* name */
+ false, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A 24 bit address. */
+ HOWTO (R_M32R_24, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 24, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_unsigned, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_24", /* name */
+ false, /* partial_inplace */
+ 0xffffff, /* src_mask */
+ 0xffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* An PC Relative 10-bit relocation, shifted by 2.
+ This reloc is complicated because relocations are relative to pc & -4.
+ i.e. branches in the right insn slot use the address of the left insn
+ slot for pc. */
+ HOWTO (R_M32R_10_PCREL, /* type */
+ 2, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ m32r_elf_10_pcrel_reloc, /* special_function */
+ "R_M32R_10_PCREL", /* name */
+ false, /* partial_inplace */
+ 0xff, /* src_mask */
+ 0xff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* A relative 18 bit relocation, right shifted by 2. */
+ HOWTO (R_M32R_18_PCREL, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 18, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_18_PCREL", /* name */
+ false, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* A relative 26 bit relocation, right shifted by 2. */
+ HOWTO (R_M32R_26_PCREL, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_26_PCREL", /* name */
+ false, /* partial_inplace */
+ 0xffffff, /* src_mask */
+ 0xffffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* High 16 bits of address when lower 16 is or'd in. */
+ HOWTO (R_M32R_HI16_ULO, /* type */
+ 16, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_HI16_ULO", /* name */
+ false, /* partial_inplace */
+ 0x0000ffff, /* src_mask */
+ 0x0000ffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* High 16 bits of address when lower 16 is added in. */
+ HOWTO (R_M32R_HI16_SLO, /* type */
+ 16, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ m32r_elf_hi16_slo_reloc, /* special_function */
+ "R_M32R_HI16_SLO", /* name */
+ false, /* partial_inplace */
+ 0x0000ffff, /* src_mask */
+ 0x0000ffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Lower 16 bits of address. */
+ HOWTO (R_M32R_LO16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32R_LO16", /* name */
+ false, /* partial_inplace */
+ 0x0000ffff, /* src_mask */
+ 0x0000ffff, /* dst_mask */
+ false), /* pcrel_offset */
+};
+
+/* Handle the R_M32R_10_PCREL reloc. */
+
+static bfd_reloc_status_type
+m32r_elf_10_pcrel_reloc (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_vma x;
+ reloc_howto_type *howto;
+
+ /* This part if from bfd_elf_generic_reloc. */
+ if (output_bfd != (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;
+ }
+
+ if (output_bfd != NULL)
+ {
+ /* FIXME: See bfd_perform_relocation. Is this right? */
+ return bfd_reloc_continue;
+ }
+
+ /* The rest is copied from bfd_perform_relocation, modified to suit us. */
+
+ if (reloc_entry->address > input_section->_cooked_size)
+ return bfd_reloc_outofrange;
+
+ relocation = (symbol->value
+ + symbol->section->output_section->vma
+ + symbol->section->output_offset);
+ relocation += reloc_entry->addend;
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset);
+ relocation -= (reloc_entry->address & -4L);
+
+ howto = reloc_entry->howto;
+ x = bfd_get_16 (abfd, (char *) data + reloc_entry->address);
+ relocation >>= howto->rightshift;
+ relocation <<= howto->bitpos;
+ x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
+ bfd_put_16 (abfd, x, (char *) data + reloc_entry->address);
+
+ if ((bfd_signed_vma) relocation < - 0x80
+ || (bfd_signed_vma) relocation > 0x7f)
+ return bfd_reloc_overflow;
+ else
+ return bfd_reloc_ok;
+}
+
+/* Handle the R_M32R_HI16_SLO reloc.
+ This reloc is used in load/store with displacement instructions.
+ The lower 16 bits are sign extended when added to the high 16 bytes
+ so if the lower 16 bits are negative (bit 15 == 1) then we must add one
+ to the high 16 bytes (which will get subtracted off when the low 16 bits
+ are added. */
+
+static bfd_reloc_status_type
+m32r_elf_hi16_slo_reloc (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;
+ unsigned long x;
+ int bit15;
+ reloc_howto_type *howto;
+
+ /* This part if from bfd_elf_generic_reloc. */
+ if (output_bfd != (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;
+ }
+
+ if (output_bfd != NULL)
+ {
+ /* FIXME: See bfd_perform_relocation. Is this right? */
+ return bfd_reloc_continue;
+ }
+
+ /* The rest is copied from bfd_perform_relocation, modified to suit us. */
+
+ if (reloc_entry->address > input_section->_cooked_size)
+ return bfd_reloc_outofrange;
+
+ relocation = (symbol->value
+ + symbol->section->output_section->vma
+ + symbol->section->output_offset);
+ relocation += reloc_entry->addend;
+
+ howto = reloc_entry->howto;
+ x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
+ bit15 = relocation & 0x8000;
+ relocation >>= howto->rightshift;
+ if (bit15)
+ relocation += 1;
+ relocation <<= howto->bitpos;
+ x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
+ bfd_put_32 (abfd, x, (char *) data + reloc_entry->address);
+
+ return bfd_reloc_ok;
+}
+
+/* Map BFD reloc types to M32R ELF reloc types. */
+
+struct m32r_reloc_map
+{
+ unsigned char bfd_reloc_val;
+ unsigned char elf_reloc_val;
+};
+
+static const struct m32r_reloc_map m32r_reloc_map[] =
+{
+ { BFD_RELOC_NONE, R_M32R_NONE },
+ { BFD_RELOC_16, R_M32R_16 },
+ { BFD_RELOC_32, R_M32R_32 },
+ { BFD_RELOC_M32R_24, R_M32R_24 },
+ { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL },
+ { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL },
+ { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL },
+ { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO },
+ { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO },
+ { BFD_RELOC_M32R_LO16, R_M32R_LO16 },
+};
+
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_type_lookup (abfd, code)
+ bfd *abfd;
+ bfd_reloc_code_real_type code;
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map);
+ i++)
+ {
+ if (m32r_reloc_map[i].bfd_reloc_val == code)
+ return &elf_m32r_howto_table[m32r_reloc_map[i].elf_reloc_val];
+ }
+
+ return NULL;
+}
+
+/* Set the howto pointer for an M32R ELF reloc. */
+
+static void
+m32r_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf32_Internal_Rel *dst;
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ BFD_ASSERT (r_type < (unsigned int) R_M32R_max);
+ cache_ptr->howto = &elf_m32r_howto_table[r_type];
+}
+
+#define ELF_ARCH bfd_arch_m32r
+#define ELF_MACHINE_CODE EM_CYGNUS_M32R
+#define ELF_MAXPAGESIZE 0x1000
+
+#define TARGET_BIG_SYM bfd_elf32_m32r_vec
+#define TARGET_BIG_NAME "elf32-m32r"
+
+#define elf_info_to_howto 0
+#define elf_info_to_howto_rel m32r_info_to_howto_rel
+#define elf_backend_object_p 0
+#define elf_backend_final_write_processing 0
+
+#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / commitdiff
