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authorIan Lance Taylor <ian@airs.com>1999-09-04 17:07:46 +0000
committerIan Lance Taylor <ian@airs.com>1999-09-04 17:07:46 +0000
commit0bcb993b9f9ddf2dce0a3e137d42c027ac1edf70 (patch)
treedfd566a4bcee7708f247974510be2aa99bba0904 /bfd/elf32-pj.c
parentef14edc44ec441c28a756a0b07395f2dc36af2a0 (diff)
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1999-09-04 Steve Chamberlain <sac@pobox.com>
* cpu-pj.c: New file. * elf32-pj.c: New file. * config.bfd (pj*): New cpu. (pj-*-*, pjl-*-*): New targets. * configure.in (bfd_elf32_pj_vec): New target vector. (bfd_elf32_pjl_vec): New target vector. * archures.c (bfd_arch_pj): Define. * elf.c (prep_headers): Handle bfd_arch_pj. * reloc.c: Define BFD_RELOC_PJ_* relocations. * targets.c (bfd_elf32_pj_vec, bfd_elf32_pjl_vec): Declare and add to target vector list. * Makefile.am: Rebuild dependencies. (ALL_MACHINES): Add cpu-pj.lo. (ALL_MACHINES_CFILES): Add cpu-pj.c. (BFD32_BACKENDS): Add elf32-pj.lo. (BFD32_BACKENDS_CFILES): Add elf32-pj.c. * configure, Makefile.in, bfd-in2.h, libbfd.h: Rebuild.
Diffstat (limited to 'bfd/elf32-pj.c')
-rw-r--r--bfd/elf32-pj.c349
1 files changed, 349 insertions, 0 deletions
diff --git a/bfd/elf32-pj.c b/bfd/elf32-pj.c
new file mode 100644
index 0000000..3b96949
--- /dev/null
+++ b/bfd/elf32-pj.c
@@ -0,0 +1,349 @@
+/* picoJava specific support for 32-bit ELF
+ Copyright 1999 Free Software Foundation, Inc.
+ Contributed by Steve Chamberlan of Transmeta (sac@pobox.com).
+
+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 "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/pj.h"
+
+static bfd_reloc_status_type pj_elf_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static reloc_howto_type *pj_elf_reloc_type_lookup
+ PARAMS ((bfd *, bfd_reloc_code_real_type));
+static void pj_elf_info_to_howto
+ PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
+
+static reloc_howto_type pj_elf_howto_table[] =
+{
+ /* No relocation. */
+ HOWTO (R_PJ_NONE, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_NONE", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 32 bit absolute relocation. Setting partial_inplace to true and
+ src_mask to a non-zero value is similar to the COFF toolchain. */
+ HOWTO (R_PJ_DATA_DIR32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_DIR32", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 32 bit PC relative relocation. */
+ HOWTO (R_PJ_CODE_REL32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_REL32", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+/* 16 bit PC relative relocation. */
+ HOWTO (R_PJ_CODE_REL16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overf6w */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_REL16", /* name */
+ false, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ true), /* pcrel_offset */
+ EMPTY_HOWTO (4),
+ EMPTY_HOWTO (5),
+ HOWTO (R_PJ_CODE_DIR32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_CODE_DIR32", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ EMPTY_HOWTO (7),
+ EMPTY_HOWTO (8),
+ EMPTY_HOWTO (9),
+ EMPTY_HOWTO (10),
+ EMPTY_HOWTO (11),
+ EMPTY_HOWTO (12),
+
+ HOWTO (R_PJ_CODE_LO16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_unsigned, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_LO16", /* name */
+ false, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+
+ HOWTO (R_PJ_CODE_HI16, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_unsigned, /* complain_on_overflow */
+ pj_elf_reloc, /* special_function */
+ "R_PJ_HI16", /* name */
+ false, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* GNU extension to record C++ vtable hierarchy */
+ HOWTO (R_PJ_GNU_VTINHERIT, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ NULL, /* special_function */
+ "R_PJ_GNU_VTINHERIT", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* GNU extension to record C++ vtable member usage */
+ HOWTO (R_PJ_GNU_VTENTRY, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ _bfd_elf_rel_vtable_reloc_fn, /* special_function */
+ "R_PJ_GNU_VTENTRY", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+
+};
+
+/* This function is used for normal relocs. This is like the COFF
+ function, and is almost certainly incorrect for other ELF targets. */
+
+static bfd_reloc_status_type
+pj_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
+ error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol_in;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message ATTRIBUTE_UNUSED;
+{
+ unsigned long insn;
+ bfd_vma sym_value;
+ enum elf_pj_reloc_type r_type;
+ bfd_vma addr = reloc_entry->address;
+ bfd_byte *hit_data = addr + (bfd_byte *) data;
+
+ r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
+
+ if (output_bfd != NULL)
+ {
+ /* Partial linking--do nothing. */
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ if (symbol_in != NULL
+ && bfd_is_und_section (symbol_in->section))
+ return bfd_reloc_undefined;
+
+ if (bfd_is_com_section (symbol_in->section))
+ sym_value = 0;
+ else
+ sym_value = (symbol_in->value +
+ symbol_in->section->output_section->vma +
+ symbol_in->section->output_offset);
+
+ switch (r_type)
+ {
+ case R_PJ_DATA_DIR32:
+ insn = bfd_get_32 (abfd, hit_data);
+ insn += sym_value + reloc_entry->addend;
+ bfd_put_32 (abfd, insn, hit_data);
+ break;
+
+ /* Relocations in code are always bigendian, no matter what the
+ data endianness is. */
+
+ case R_PJ_CODE_DIR32:
+ insn = bfd_getb32 (hit_data);
+ insn += sym_value + reloc_entry->addend;
+ bfd_putb32 (insn, hit_data);
+ break;
+
+ case R_PJ_CODE_REL16:
+ insn = bfd_getb16 (hit_data);
+ insn += sym_value + reloc_entry->addend
+ - (input_section->output_section->vma
+ + input_section->output_offset);
+ bfd_putb16 (insn, hit_data);
+ break;
+ case R_PJ_CODE_LO16:
+ insn = bfd_getb16 (hit_data);
+ insn += sym_value + reloc_entry->addend;
+ bfd_putb16 (insn, hit_data);
+ break;
+
+ case R_PJ_CODE_HI16:
+ insn = bfd_getb16 (hit_data);
+ insn += (sym_value + reloc_entry->addend) >> 16;
+ bfd_putb16 (insn, hit_data);
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+
+ return bfd_reloc_ok;
+}
+
+/* This structure is used to map BFD reloc codes to PJ ELF relocs. */
+
+struct elf_reloc_map
+{
+ bfd_reloc_code_real_type bfd_reloc_val;
+ unsigned char elf_reloc_val;
+};
+
+/* An array mapping BFD reloc codes to PJ ELF relocs. */
+
+static const struct elf_reloc_map pj_reloc_map[] =
+{
+ { BFD_RELOC_NONE, R_PJ_NONE },
+ { BFD_RELOC_32, R_PJ_DATA_DIR32 },
+ { BFD_RELOC_PJ_CODE_DIR16, R_PJ_CODE_DIR16 },
+ { BFD_RELOC_PJ_CODE_DIR32, R_PJ_CODE_DIR32 },
+ { BFD_RELOC_PJ_CODE_LO16, R_PJ_CODE_LO16 },
+ { BFD_RELOC_PJ_CODE_HI16, R_PJ_CODE_HI16 },
+ { BFD_RELOC_PJ_CODE_REL32, R_PJ_CODE_REL32 },
+ { BFD_RELOC_PJ_CODE_REL16, R_PJ_CODE_REL16 },
+ { BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
+ { BFD_RELOC_VTABLE_ENTRY, R_PJ_GNU_VTENTRY },
+};
+
+/* Given a BFD reloc code, return the howto structure for the
+ corresponding PJ ELf reloc. */
+
+static reloc_howto_type *
+pj_elf_reloc_type_lookup (abfd, code)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ bfd_reloc_code_real_type code;
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
+ {
+ if (pj_reloc_map[i].bfd_reloc_val == code)
+ return &pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
+ }
+
+ return NULL;
+}
+
+/* Given an ELF reloc, fill in the howto field of a relent. */
+
+static void
+pj_elf_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ arelent *cache_ptr;
+ Elf_Internal_Rela *dst;
+{
+ unsigned int r;
+
+ r = ELF32_R_TYPE (dst->r_info);
+
+ BFD_ASSERT (r < (unsigned int) R_PJ_max);
+
+ cache_ptr->howto = &pj_elf_howto_table[r];
+}
+
+/* Take this moment to fill in the special picoJava bits in the
+ e_flags field. */
+
+static void
+pj_elf_final_write_processing (abfd, linker)
+ bfd *abfd;
+ boolean linker ATTRIBUTE_UNUSED;
+{
+ elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
+ elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
+}
+
+#define TARGET_BIG_SYM bfd_elf32_pj_vec
+#define TARGET_BIG_NAME "elf32-pj"
+#define TARGET_LITTLE_SYM bfd_elf32_pjl_vec
+#define TARGET_LITTLE_NAME "elf32-pjl"
+#define ELF_ARCH bfd_arch_pj
+#define ELF_MACHINE_CODE EM_PJ
+#define ELF_MAXPAGESIZE 0x1000
+#define bfd_elf32_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
+#define bfd_elf32_bfd_reloc_type_lookup pj_elf_reloc_type_lookup
+#define elf_backend_final_write_processing pj_elf_final_write_processing
+#define elf_info_to_howto pj_elf_info_to_howto
+#include "elf32-target.h"