* reloc.c: Add relocs BFD_RELOC_M32R_{HI16_[US]LO,LO16}.

	* bfd-in2.h, libbfd.h: Regenerated.
	* elf32-m32r.c: Add support for them.

1 files changed, 383 insertions, 0 deletions

diff --git a/bfd/elf32-m32r.c b/bfd/elf32-m32r.c
new file mode 100644
index 0000000..70875f7
--- /dev/null
+++ b/bfd/elf32-m32r.c
@@ -0,0 +1,383 @@
+/* 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"