Support for PowerPC ELF and PowerPC NetWare. Sanitization to follow.
This commit is contained in:
Ian Lance Taylor
parent
70126bf94e
commit
d03d5626e5
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@ -0,0 +1,281 @@
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/* PowerPC-specific support for 32-bit ELF
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Copyright 1994 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* I wrote this file without the benefit of a PowerPC ELF ABI. Thus,
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it probably does not correspond to whatever people finally settle
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on. Ian Taylor. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "libelf.h"
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static bfd_reloc_status_type powerpc_elf_toc16_reloc PARAMS ((bfd *abfd,
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arelent *reloc,
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asymbol *symbol,
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PTR data,
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asection *sec,
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bfd *output_bfd,
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char **error));
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static bfd_reloc_status_type powerpc_elf_b26_reloc PARAMS ((bfd *abfd,
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arelent *reloc,
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asymbol *symbol,
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PTR data,
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asection *sec,
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bfd *output_bfd,
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char **error));
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static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void powerpc_info_to_howto_rel
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rel *dst));
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#define USE_REL
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enum reloc_type
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{
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R_POWERPC_NONE = 0,
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R_POWERPC_32,
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R_POWERPC_B26,
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R_POWERPC_BA26,
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R_POWERPC_TOC16,
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R_POWERPC_max
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};
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static reloc_howto_type elf_powerpc_howto_table[] =
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{
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/* This relocation does not do anything. */
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HOWTO (R_POWERPC_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_POWERPC_NONE", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* Standard 32 bit relocation. */
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HOWTO (R_POWERPC_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_POWERPC_32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 26 bit relative branch. */
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HOWTO (R_POWERPC_B26, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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powerpc_elf_b26_reloc, /* special_function */
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"R_POWERPC_B26", /* name */
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true, /* partial_inplace */
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0x3fffffc, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* 26 bit absolute branch. */
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HOWTO (R_POWERPC_BA26, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_POWERPC_BA26", /* name */
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true, /* partial_inplace */
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0x3fffffc, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* 16 bit reference to TOC section. */
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HOWTO (R_POWERPC_TOC16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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powerpc_elf_toc16_reloc, /* special_function */
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"R_POWERPC_TOC16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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};
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/* Handle the TOC16 reloc. We want to use the offset within the .toc
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section, not the actual VMA. */
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static bfd_reloc_status_type
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powerpc_elf_toc16_reloc (abfd,
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reloc_entry,
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symbol,
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data,
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input_section,
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output_bfd,
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error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section;
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bfd *output_bfd;
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char **error_message;
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{
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asection *sec;
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/* Simply adjust the reloc addend by the negative of the VMA of the
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.toc section. */
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sec = bfd_get_section (*reloc_entry->sym_ptr_ptr);
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if (sec == &bfd_und_section)
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return bfd_reloc_continue;
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BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".toc") == 0);
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reloc_entry->addend -= sec->output_section->vma;
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return bfd_reloc_continue;
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}
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/* Handle a branch. If the next instruction is the special
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instruction "cror 31,31,31", and this branch is to a stub routine
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we have created, we must change the cror instruction into an
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instruction which reloads the TOC register. We can detect a stub
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routine because it is in a BFD named "linker stubs". FIXME: What a
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hack. */
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static bfd_reloc_status_type
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powerpc_elf_b26_reloc (abfd,
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reloc_entry,
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symbol,
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data,
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input_section,
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output_bfd,
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error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section;
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bfd *output_bfd;
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char **error_message;
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{
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if (bfd_get_section (symbol) != &bfd_und_section
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&& (strcmp (bfd_get_section (symbol)->owner->filename, "linker stubs")
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== 0))
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{
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bfd_vma val;
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/* This symbol is a stub created by the linker. */
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val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address + 4);
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if (val == 0x4ffffb82) /* cror 31,31,31 */
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bfd_put_32 (abfd, (bfd_vma) 0x80410014, /* l r2,20(r1) */
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(bfd_byte *) data + reloc_entry->address + 4);
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}
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if (output_bfd != (bfd *) NULL
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&& bfd_get_section (symbol) == &bfd_und_section)
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{
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bfd_size_type address;
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/* If we are generating relocateable output, and the symbol is
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undefined, we just want to adjust the reloc by the amount the
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section moved. */
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address = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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return _bfd_relocate_contents (reloc_entry->howto, abfd,
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- input_section->output_offset,
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(bfd_byte *) data + address);
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}
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/* Otherwise, let bfd_perform_relocation handle it. */
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return bfd_reloc_continue;
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}
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/* Map BFD reloc types to PowerPC ELF reloc types. */
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struct powerpc_reloc_map
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{
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unsigned char bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct powerpc_reloc_map powerpc_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_POWERPC_NONE, },
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{ BFD_RELOC_32, R_POWERPC_32 },
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{ BFD_RELOC_CTOR, R_POWERPC_32 },
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{ BFD_RELOC_PPC_B26, R_POWERPC_B26 },
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{ BFD_RELOC_PPC_BA26, R_POWERPC_BA26 },
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{ BFD_RELOC_PPC_TOC16, R_POWERPC_TOC16 }
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};
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static const struct reloc_howto_struct *
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bfd_elf32_bfd_reloc_type_lookup (abfd, code)
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bfd *abfd;
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bfd_reloc_code_real_type code;
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{
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int i;
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for (i = 0;
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i < sizeof (powerpc_reloc_map) / sizeof (struct powerpc_reloc_map);
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i++)
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{
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if (powerpc_reloc_map[i].bfd_reloc_val == code)
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return &elf_powerpc_howto_table[powerpc_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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/* Set the howto pointer for a PowerPC ELF reloc. */
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static void
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powerpc_info_to_howto_rel (abfd, cache_ptr, dst)
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bfd *abfd;
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arelent *cache_ptr;
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Elf32_Internal_Rel *dst;
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{
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BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_POWERPC_max);
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cache_ptr->howto = &elf_powerpc_howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
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#define TARGET_BIG_NAME "elf32-powerpc"
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#define ELF_ARCH bfd_arch_powerpc
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#define ELF_MACHINE_CODE EM_CYGNUS_POWERPC
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#define ELF_MAXPAGESIZE 0x10000
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#define elf_info_to_howto 0
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#define elf_info_to_howto_rel powerpc_info_to_howto_rel
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#include "elf32-target.h"
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@ -0,0 +1,739 @@
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/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
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Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#define ARCH_SIZE 32
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#include "nlm/ppc-ext.h"
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#define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header
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#include "libnlm.h"
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static boolean nlm_powerpc_backend_object_p
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PARAMS ((bfd *));
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static boolean nlm_powerpc_write_prefix
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PARAMS ((bfd *));
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static boolean nlm_powerpc_read_reloc
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PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
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static boolean nlm_powerpc_mangle_relocs
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PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
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static boolean nlm_powerpc_read_import
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static boolean nlm_powerpc_write_import
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PARAMS ((bfd *, asection *, arelent *));
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static boolean nlm_powerpc_write_external
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PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
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/* PowerPC NLM's have a prefix header before the standard NLM. This
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function reads it in, verifies the version, and seeks the bfd to
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the location before the regular NLM header. */
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static boolean
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nlm_powerpc_backend_object_p (abfd)
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bfd *abfd;
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{
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struct nlm32_powerpc_external_prefix_header s;
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if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
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return false;
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if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0
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|| bfd_h_get_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION)
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return false;
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return true;
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}
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/* Write out the prefix. */
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static boolean
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nlm_powerpc_write_prefix (abfd)
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bfd *abfd;
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{
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struct nlm32_powerpc_external_prefix_header s;
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memset (&s, 0, sizeof s);
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memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature);
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bfd_h_put_32 (abfd, (bfd_vma) NLM32_POWERPC_HEADER_VERSION, s.headerVersion);
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bfd_h_put_32 (abfd, (bfd_vma) 0, s.origins);
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/* FIXME: What should we do about the date? */
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if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
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return false;
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return true;
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}
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/* How to process the various reloc types. PowerPC NLMs use XCOFF
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reloc types, and I have just copied the XCOFF reloc table here. */
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static reloc_howto_type nlm_powerpc_howto_table[] =
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{
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/* Standard 32 bit relocation. */
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HOWTO (0, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"R_POS", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 32 bit relocation, but store negative value. */
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HOWTO (1, /* type */
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0, /* rightshift */
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-2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"R_NEG", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 32 bit PC relative relocation. */
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HOWTO (2, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"R_REL", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 16 bit TOC relative relocation. */
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HOWTO (3, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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||||
"R_TOC", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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||||
false), /* pcrel_offset */
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||||
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/* I don't really know what this is. */
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HOWTO (4, /* type */
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1, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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||||
"R_RTB", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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||||
false), /* pcrel_offset */
|
||||
|
||||
/* External TOC relative symbol. */
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HOWTO (5, /* type */
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||||
0, /* rightshift */
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||||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||||
16, /* bitsize */
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||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_GL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Local TOC relative symbol. */
|
||||
HOWTO (6, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_TCL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
{ 7 },
|
||||
|
||||
/* Non modifiable absolute branch. */
|
||||
HOWTO (8, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
26, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_BA", /* name */
|
||||
true, /* partial_inplace */
|
||||
0x3fffffc, /* src_mask */
|
||||
0x3fffffc, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
{ 9 },
|
||||
|
||||
/* Non modifiable relative branch. */
|
||||
HOWTO (0xa, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
26, /* bitsize */
|
||||
true, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_signed, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_BR", /* name */
|
||||
true, /* partial_inplace */
|
||||
0x3fffffc, /* src_mask */
|
||||
0x3fffffc, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
{ 0xb },
|
||||
|
||||
/* Indirect load. */
|
||||
HOWTO (0xc, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Load address. */
|
||||
HOWTO (0xd, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RLA", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
{ 0xe },
|
||||
|
||||
/* Non-relocating reference. */
|
||||
HOWTO (0xf, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
32, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_REF", /* name */
|
||||
false, /* partial_inplace */
|
||||
0, /* src_mask */
|
||||
0, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
{ 0x10 },
|
||||
{ 0x11 },
|
||||
|
||||
/* TOC relative indirect load. */
|
||||
HOWTO (0x12, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_TRL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* TOC relative load address. */
|
||||
HOWTO (0x13, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_TRLA", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable relative branch. */
|
||||
HOWTO (0x14, /* type */
|
||||
1, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
32, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RRTBI", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffffffff, /* src_mask */
|
||||
0xffffffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable absolute branch. */
|
||||
HOWTO (0x15, /* type */
|
||||
1, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
32, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RRTBA", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffffffff, /* src_mask */
|
||||
0xffffffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable call absolute indirect. */
|
||||
HOWTO (0x16, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_CAI", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable call relative. */
|
||||
HOWTO (0x17, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_REL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable branch absolute. */
|
||||
HOWTO (0x18, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RBA", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable branch absolute. */
|
||||
HOWTO (0x19, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_RBAC", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable branch relative. */
|
||||
HOWTO (0x1a, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
26, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_signed, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_REL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false), /* pcrel_offset */
|
||||
|
||||
/* Modifiable branch absolute. */
|
||||
HOWTO (0x1b, /* type */
|
||||
0, /* rightshift */
|
||||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||||
16, /* bitsize */
|
||||
false, /* pc_relative */
|
||||
0, /* bitpos */
|
||||
complain_overflow_bitfield, /* complain_on_overflow */
|
||||
0, /* special_function */
|
||||
"R_REL", /* name */
|
||||
true, /* partial_inplace */
|
||||
0xffff, /* src_mask */
|
||||
0xffff, /* dst_mask */
|
||||
false) /* pcrel_offset */
|
||||
};
|
||||
|
||||
#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \
|
||||
/ sizeof nlm_powerpc_howto_table[0])
|
||||
|
||||
/* Read a PowerPC NLM reloc. */
|
||||
|
||||
static boolean
|
||||
nlm_powerpc_read_reloc (abfd, sym, secp, rel)
|
||||
bfd *abfd;
|
||||
nlmNAME(symbol_type) *sym;
|
||||
asection **secp;
|
||||
arelent *rel;
|
||||
{
|
||||
struct nlm32_powerpc_external_reloc ext;
|
||||
bfd_vma l_vaddr;
|
||||
unsigned long l_symndx;
|
||||
int l_rtype;
|
||||
int l_rsecnm;
|
||||
|
||||
/* Read the reloc from the file. */
|
||||
if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext)
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Swap in the fields. */
|
||||
l_vaddr = bfd_h_get_32 (abfd, ext.l_vaddr);
|
||||
l_symndx = bfd_h_get_32 (abfd, ext.l_symndx);
|
||||
l_rtype = bfd_h_get_16 (abfd, ext.l_rtype);
|
||||
l_rsecnm = bfd_h_get_16 (abfd, ext.l_rsecnm);
|
||||
|
||||
/* Work out the arelent fields. */
|
||||
if (sym != NULL)
|
||||
{
|
||||
/* This is an import. sym_ptr_ptr is filled in by
|
||||
nlm_canonicalize_reloc. */
|
||||
rel->sym_ptr_ptr = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
asection *sec;
|
||||
|
||||
if (l_symndx == 0)
|
||||
sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
||||
else if (l_symndx == 1)
|
||||
sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
||||
else if (l_symndx == 2)
|
||||
sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
|
||||
else
|
||||
{
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
|
||||
rel->sym_ptr_ptr = sec->symbol_ptr_ptr;
|
||||
}
|
||||
|
||||
rel->address = l_vaddr;
|
||||
rel->addend = 0;
|
||||
|
||||
BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT);
|
||||
|
||||
rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff);
|
||||
|
||||
BFD_ASSERT (rel->howto->name != NULL
|
||||
&& ((l_rtype & 0x8000) != 0
|
||||
? (rel->howto->complain_on_overflow
|
||||
== complain_overflow_signed)
|
||||
: (rel->howto->complain_on_overflow
|
||||
== complain_overflow_bitfield))
|
||||
&& ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1);
|
||||
|
||||
if (l_rsecnm == 0)
|
||||
*secp = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
||||
else if (l_rsecnm == 1)
|
||||
*secp = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
||||
else
|
||||
{
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Mangle PowerPC NLM relocs for output. */
|
||||
|
||||
static boolean
|
||||
nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count)
|
||||
bfd *abfd;
|
||||
asection *sec;
|
||||
PTR data;
|
||||
bfd_vma offset;
|
||||
bfd_size_type count;
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Read a PowerPC NLM import record */
|
||||
|
||||
static boolean
|
||||
nlm_powerpc_read_import (abfd, sym)
|
||||
bfd *abfd;
|
||||
nlmNAME(symbol_type) *sym;
|
||||
{
|
||||
struct nlm_relent *nlm_relocs; /* relocation records for symbol */
|
||||
bfd_size_type rcount; /* number of relocs */
|
||||
bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */
|
||||
unsigned char symlength; /* length of symbol name */
|
||||
|
||||
if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
|
||||
!= sizeof (symlength))
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return (false);
|
||||
}
|
||||
sym -> symbol.the_bfd = abfd;
|
||||
sym -> symbol.name = bfd_alloc (abfd, symlength + 1);
|
||||
if (bfd_read ((PTR) sym -> symbol.name, symlength, 1, abfd)
|
||||
!= symlength)
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return (false);
|
||||
}
|
||||
sym -> symbol.flags = 0;
|
||||
sym -> symbol.value = 0;
|
||||
sym -> symbol.section = &bfd_und_section;
|
||||
if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return (false);
|
||||
}
|
||||
rcount = bfd_h_get_32 (abfd, temp);
|
||||
nlm_relocs = ((struct nlm_relent *)
|
||||
bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
|
||||
if (nlm_relocs == (struct nlm_relent *) NULL)
|
||||
{
|
||||
bfd_set_error (bfd_error_no_memory);
|
||||
return false;
|
||||
}
|
||||
sym -> relocs = nlm_relocs;
|
||||
sym -> rcnt = 0;
|
||||
while (sym -> rcnt < rcount)
|
||||
{
|
||||
asection *section;
|
||||
|
||||
if (nlm_powerpc_read_reloc (abfd, sym, §ion,
|
||||
&nlm_relocs -> reloc)
|
||||
== false)
|
||||
return false;
|
||||
nlm_relocs -> section = section;
|
||||
nlm_relocs++;
|
||||
sym -> rcnt++;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Write a PowerPC NLM reloc. */
|
||||
|
||||
static boolean
|
||||
nlm_powerpc_write_import (abfd, sec, rel)
|
||||
bfd *abfd;
|
||||
asection *sec;
|
||||
arelent *rel;
|
||||
{
|
||||
struct nlm32_powerpc_external_reloc ext;
|
||||
asymbol *sym;
|
||||
asection *symsec;
|
||||
unsigned long l_symndx;
|
||||
int l_rtype;
|
||||
int l_rsecnm;
|
||||
const reloc_howto_type *howto;
|
||||
|
||||
bfd_h_put_32 (abfd, rel->address, ext.l_vaddr);
|
||||
|
||||
sym = *rel->sym_ptr_ptr;
|
||||
symsec = bfd_get_section (sym);
|
||||
if (symsec == &bfd_und_section)
|
||||
l_symndx = 0;
|
||||
else if (symsec == bfd_get_section_by_name (abfd, NLM_CODE_NAME))
|
||||
l_symndx = 0;
|
||||
else if (symsec == bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME))
|
||||
l_symndx = 1;
|
||||
else if (symsec == bfd_get_section_by_name (abfd,
|
||||
NLM_UNINITIALIZED_DATA_NAME))
|
||||
l_symndx = 2;
|
||||
else
|
||||
{
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
|
||||
bfd_h_put_32 (abfd, (bfd_vma) l_symndx, ext.l_symndx);
|
||||
|
||||
for (howto = nlm_powerpc_howto_table;
|
||||
howto < nlm_powerpc_howto_table + HOWTO_COUNT;
|
||||
howto++)
|
||||
{
|
||||
if (howto->rightshift == rel->howto->rightshift
|
||||
&& howto->size == rel->howto->size
|
||||
&& howto->bitsize == rel->howto->bitsize
|
||||
&& howto->pc_relative == rel->howto->pc_relative
|
||||
&& howto->bitpos == rel->howto->bitpos
|
||||
&& howto->partial_inplace == rel->howto->partial_inplace
|
||||
&& howto->src_mask == rel->howto->src_mask
|
||||
&& howto->dst_mask == rel->howto->dst_mask
|
||||
&& howto->pcrel_offset == rel->howto->pcrel_offset)
|
||||
break;
|
||||
}
|
||||
if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT)
|
||||
{
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
|
||||
l_rtype = howto->type;
|
||||
if (howto->complain_on_overflow == complain_overflow_signed)
|
||||
l_rtype |= 0x8000;
|
||||
l_rtype |= (howto->bitsize - 1) << 8;
|
||||
bfd_h_put_16 (abfd, (bfd_vma) l_rtype, ext.l_rtype);
|
||||
|
||||
if (sec == bfd_get_section_by_name (abfd, NLM_CODE_NAME))
|
||||
l_rsecnm = 0;
|
||||
else if (sec == bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME))
|
||||
l_rsecnm = 1;
|
||||
else
|
||||
{
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
|
||||
bfd_h_put_16 (abfd, (bfd_vma) l_rsecnm, ext.l_rsecnm);
|
||||
|
||||
if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext)
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Write a PowerPC NLM external symbol. */
|
||||
|
||||
static boolean
|
||||
nlm_powerpc_write_external (abfd, count, sym, relocs)
|
||||
bfd *abfd;
|
||||
bfd_size_type count;
|
||||
asymbol *sym;
|
||||
struct reloc_and_sec *relocs;
|
||||
{
|
||||
int i;
|
||||
bfd_byte len;
|
||||
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
||||
|
||||
len = strlen (sym->name);
|
||||
if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte))
|
||||
|| bfd_write (sym->name, len, 1, abfd) != len)
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return false;
|
||||
}
|
||||
|
||||
bfd_put_32 (abfd, count, temp);
|
||||
if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp))
|
||||
{
|
||||
bfd_set_error (bfd_error_system_call);
|
||||
return false;
|
||||
}
|
||||
|
||||
for (i = 0; i < count; i++)
|
||||
{
|
||||
if (nlm_powerpc_write_import (abfd, relocs[i].sec,
|
||||
relocs[i].rel) == false)
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
#include "nlmswap.h"
|
||||
|
||||
static const struct nlm_backend_data nlm32_powerpc_backend =
|
||||
{
|
||||
"NetWare PowerPC Module \032",
|
||||
sizeof (Nlm32_powerpc_External_Fixed_Header),
|
||||
sizeof (struct nlm32_powerpc_external_prefix_header),
|
||||
bfd_arch_powerpc,
|
||||
0,
|
||||
false,
|
||||
nlm_powerpc_backend_object_p,
|
||||
nlm_powerpc_write_prefix,
|
||||
nlm_powerpc_read_reloc,
|
||||
nlm_powerpc_mangle_relocs,
|
||||
nlm_powerpc_read_import,
|
||||
nlm_powerpc_write_import,
|
||||
0, /* set_public_section */
|
||||
0, /* get_public_offset */
|
||||
nlm_swap_fixed_header_in,
|
||||
nlm_swap_fixed_header_out,
|
||||
nlm_powerpc_write_external,
|
||||
0, /* write_export */
|
||||
};
|
||||
|
||||
#define TARGET_BIG_NAME "nlm32-powerpc"
|
||||
#define TARGET_BIG_SYM nlmNAME(powerpc_vec)
|
||||
#define TARGET_BACKEND_DATA &nlm32_powerpc_backend
|
||||
|
||||
#include "nlm-target.h"
|
||||
Loading…
Reference in New Issue