893 lines
26 KiB
C
893 lines
26 KiB
C
/* Support for 32-bit Alpha NLM (NetWare Loadable Module)
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Copyright 1993, 1994, 2000, 2001, 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file describes the 32 bit Alpha NLM format. You might think
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that an Alpha chip would use a 64 bit format, but, for some reason,
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it doesn't. */
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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/alpha-ext.h"
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#define Nlm_External_Fixed_Header Nlm32_alpha_External_Fixed_Header
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#include "libnlm.h"
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static bfd_boolean nlm_alpha_backend_object_p
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PARAMS ((bfd *));
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static bfd_boolean nlm_alpha_write_prefix
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PARAMS ((bfd *));
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static bfd_boolean nlm_alpha_read_reloc
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PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
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static bfd_boolean nlm_alpha_mangle_relocs
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PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
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static bfd_boolean nlm_alpha_read_import
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static bfd_boolean nlm_alpha_write_import
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PARAMS ((bfd *, asection *, arelent *));
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static bfd_boolean nlm_alpha_set_public_section
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static bfd_vma nlm_alpha_get_public_offset
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PARAMS ((bfd *, asymbol *));
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static bfd_boolean nlm_alpha_write_external
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PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
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/* Alpha 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 bfd_boolean
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nlm_alpha_backend_object_p (abfd)
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bfd *abfd;
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{
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struct nlm32_alpha_external_prefix_header s;
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file_ptr size;
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if (bfd_bread ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s)
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return FALSE;
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if (H_GET_32 (abfd, s.magic) != NLM32_ALPHA_MAGIC)
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return FALSE;
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/* FIXME: Should we check the format number? */
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/* Skip to the end of the header. */
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size = H_GET_32 (abfd, s.size);
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if (bfd_seek (abfd, size, SEEK_SET) != 0)
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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 bfd_boolean
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nlm_alpha_write_prefix (abfd)
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bfd *abfd;
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{
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struct nlm32_alpha_external_prefix_header s;
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memset (&s, 0, sizeof s);
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H_PUT_32 (abfd, NLM32_ALPHA_MAGIC, s.magic);
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H_PUT_32 (abfd, 2, s.format);
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H_PUT_32 (abfd, sizeof s, s.size);
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if (bfd_bwrite ((PTR) &s, (bfd_size_type) sizeof s, 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. */
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static reloc_howto_type nlm32_alpha_howto_table[] =
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{
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/* Reloc type 0 is ignored by itself. However, it appears after a
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GPDISP reloc to identify the location where the low order 16 bits
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of the gp register are loaded. */
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HOWTO (ALPHA_R_IGNORE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"IGNORE", /* name */
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FALSE, /* 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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/* A 32 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFLONG, /* 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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"REFLONG", /* 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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/* A 64 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFQUAD, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* 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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"REFQUAD", /* name */
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TRUE, /* partial_inplace */
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0xffffffffffffffff, /* src_mask */
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0xffffffffffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 32 bit GP relative offset. This is just like REFLONG except
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that when the value is used the value of the gp register will be
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added in. */
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HOWTO (ALPHA_R_GPREL32, /* 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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"GPREL32", /* 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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/* Used for an instruction that refers to memory off the GP
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register. The offset is 16 bits of the 32 bit instruction. This
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reloc always seems to be against the .lita section. */
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HOWTO (ALPHA_R_LITERAL, /* 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 */
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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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"LITERAL", /* 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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/* This reloc only appears immediately following a LITERAL reloc.
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It identifies a use of the literal. It seems that the linker can
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use this to eliminate a portion of the .lita section. The symbol
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index is special: 1 means the literal address is in the base
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register of a memory format instruction; 2 means the literal
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address is in the byte offset register of a byte-manipulation
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instruction; 3 means the literal address is in the target
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register of a jsr instruction. This does not actually do any
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relocation. */
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HOWTO (ALPHA_R_LITUSE, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"LITUSE", /* name */
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FALSE, /* 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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/* Load the gp register. This is always used for a ldah instruction
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which loads the upper 16 bits of the gp register. The next reloc
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will be an IGNORE reloc which identifies the location of the lda
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instruction which loads the lower 16 bits. The symbol index of
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the GPDISP instruction appears to actually be the number of bytes
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between the ldah and lda instructions. This gives two different
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ways to determine where the lda instruction is; I don't know why
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both are used. The value to use for the relocation is the
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difference between the GP value and the current location; the
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load will always be done against a register holding the current
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address. */
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HOWTO (ALPHA_R_GPDISP, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"GPDISP", /* 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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TRUE), /* pcrel_offset */
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/* A 21 bit branch. The native assembler generates these for
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branches within the text segment, and also fills in the PC
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relative offset in the instruction. It seems to me that this
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reloc, unlike the others, is not partial_inplace. */
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HOWTO (ALPHA_R_BRADDR, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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21, /* 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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"BRADDR", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x1fffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A hint for a jump to a register. */
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HOWTO (ALPHA_R_HINT, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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14, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"HINT", /* name */
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TRUE, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* 16 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL16, /* 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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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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"SREL16", /* 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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/* 32 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL32, /* 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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"SREL32", /* 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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/* A 64 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL64, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* 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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"SREL64", /* name */
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TRUE, /* partial_inplace */
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0xffffffffffffffff, /* src_mask */
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0xffffffffffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Push a value on the reloc evaluation stack. */
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HOWTO (ALPHA_R_OP_PUSH, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"OP_PUSH", /* name */
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FALSE, /* 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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/* Store the value from the stack at the given address. Store it in
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a bitfield of size r_size starting at bit position r_offset. */
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HOWTO (ALPHA_R_OP_STORE, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"OP_STORE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffffffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Subtract the reloc address from the value on the top of the
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relocation stack. */
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HOWTO (ALPHA_R_OP_PSUB, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"OP_PSUB", /* name */
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FALSE, /* 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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/* Shift the value on the top of the relocation stack right by the
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given value. */
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HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"OP_PRSHIFT", /* name */
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FALSE, /* 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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/* Adjust the GP value for a new range in the object file. */
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HOWTO (ALPHA_R_GPVALUE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"GPVALUE", /* name */
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FALSE, /* 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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};
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static reloc_howto_type nlm32_alpha_nw_howto =
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HOWTO (ALPHA_R_NW_RELOC, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"NW_RELOC", /* name */
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FALSE, /* 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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/* Read an Alpha NLM reloc. This routine keeps some static data which
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it uses when handling local relocs. This only works correctly
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because all the local relocs are read at once. */
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static bfd_boolean
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nlm_alpha_read_reloc (abfd, sym, secp, rel)
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bfd *abfd;
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nlmNAME(symbol_type) *sym;
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asection **secp;
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arelent *rel;
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{
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static bfd_vma gp_value;
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static bfd_vma lita_address;
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struct nlm32_alpha_external_reloc ext;
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bfd_vma r_vaddr;
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long r_symndx;
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int r_type, r_extern, r_offset, r_size;
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asection *code_sec, *data_sec;
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/* Read the reloc from the file. */
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if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
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return FALSE;
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/* Swap in the reloc information. */
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r_vaddr = H_GET_64 (abfd, ext.r_vaddr);
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r_symndx = H_GET_32 (abfd, ext.r_symndx);
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BFD_ASSERT (bfd_little_endian (abfd));
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r_type = ((ext.r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
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>> RELOC_BITS0_TYPE_SH_LITTLE);
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r_extern = (ext.r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
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r_offset = ((ext.r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
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>> RELOC_BITS1_OFFSET_SH_LITTLE);
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/* Ignore the reserved bits. */
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r_size = ((ext.r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
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>> RELOC_BITS3_SIZE_SH_LITTLE);
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/* Fill in the BFD arelent structure. */
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code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
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data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
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if (r_extern)
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{
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/* External relocations are only used for imports. */
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BFD_ASSERT (sym != NULL);
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/* We don't need to set sym_ptr_ptr for this case. It is set in
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nlm_canonicalize_reloc. */
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rel->sym_ptr_ptr = NULL;
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rel->addend = 0;
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}
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else
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{
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/* Internal relocations are only used for local relocation
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fixups. If they are not NW_RELOC or GPDISP or IGNORE, they
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must be against .text or .data. */
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BFD_ASSERT (r_type == ALPHA_R_NW_RELOC || sym == NULL);
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if (r_type == ALPHA_R_NW_RELOC
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|| r_type == ALPHA_R_GPDISP
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|| r_type == ALPHA_R_IGNORE)
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{
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rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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rel->addend = 0;
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}
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else if (r_symndx == ALPHA_RELOC_SECTION_TEXT)
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{
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rel->sym_ptr_ptr = code_sec->symbol_ptr_ptr;
|
||
BFD_ASSERT (bfd_get_section_vma (abfd, code_sec) == 0);
|
||
rel->addend = 0;
|
||
}
|
||
else if (r_symndx == ALPHA_RELOC_SECTION_DATA)
|
||
{
|
||
rel->sym_ptr_ptr = data_sec->symbol_ptr_ptr;
|
||
rel->addend = - bfd_get_section_vma (abfd, data_sec);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (0);
|
||
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
rel->addend = 0;
|
||
}
|
||
}
|
||
|
||
/* We use the address to determine whether the reloc is in the .text
|
||
or .data section. R_NW_RELOC relocs don't really have a section,
|
||
so we put them in .text. */
|
||
if (r_type == ALPHA_R_NW_RELOC
|
||
|| r_vaddr < bfd_section_size (abfd, code_sec))
|
||
{
|
||
*secp = code_sec;
|
||
rel->address = r_vaddr;
|
||
}
|
||
else
|
||
{
|
||
*secp = data_sec;
|
||
rel->address = r_vaddr - bfd_section_size (abfd, code_sec);
|
||
}
|
||
|
||
/* We must adjust the addend based on the type. */
|
||
BFD_ASSERT ((r_type >= 0 && r_type <= ALPHA_R_GPVALUE)
|
||
|| r_type == ALPHA_R_NW_RELOC);
|
||
|
||
switch (r_type)
|
||
{
|
||
case ALPHA_R_BRADDR:
|
||
case ALPHA_R_SREL16:
|
||
case ALPHA_R_SREL32:
|
||
case ALPHA_R_SREL64:
|
||
/* The PC relative relocs do not seem to use the section VMA as
|
||
a negative addend. */
|
||
rel->addend = 0;
|
||
break;
|
||
|
||
case ALPHA_R_GPREL32:
|
||
/* Copy the gp value for this object file into the addend, to
|
||
ensure that we are not confused by the linker. */
|
||
if (! r_extern)
|
||
rel->addend += gp_value;
|
||
break;
|
||
|
||
case ALPHA_R_LITERAL:
|
||
BFD_ASSERT (! r_extern);
|
||
rel->addend += lita_address;
|
||
break;
|
||
|
||
case ALPHA_R_LITUSE:
|
||
case ALPHA_R_GPDISP:
|
||
/* The LITUSE and GPDISP relocs do not use a symbol, or an
|
||
addend, but they do use a special code. Put this code in the
|
||
addend field. */
|
||
rel->addend = r_symndx;
|
||
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
/* The STORE reloc needs the size and offset fields. We store
|
||
them in the addend. */
|
||
BFD_ASSERT (r_offset < 256 && r_size < 256);
|
||
rel->addend = (r_offset << 8) + r_size;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
case ALPHA_R_OP_PSUB:
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
/* The PUSH, PSUB and PRSHIFT relocs do not actually use an
|
||
address. I believe that the address supplied is really an
|
||
addend. */
|
||
rel->addend = r_vaddr;
|
||
break;
|
||
|
||
case ALPHA_R_GPVALUE:
|
||
/* Record the new gp value. */
|
||
gp_value += r_symndx;
|
||
rel->addend = gp_value;
|
||
break;
|
||
|
||
case ALPHA_R_IGNORE:
|
||
/* If the type is ALPHA_R_IGNORE, make sure this is a reference
|
||
to the absolute section so that the reloc is ignored. For
|
||
some reason the address of this reloc type is not adjusted by
|
||
the section vma. We record the gp value for this object file
|
||
here, for convenience when doing the GPDISP relocation. */
|
||
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
rel->address = r_vaddr;
|
||
rel->addend = gp_value;
|
||
break;
|
||
|
||
case ALPHA_R_NW_RELOC:
|
||
/* If this is SETGP, we set the addend to 0. Otherwise we set
|
||
the addend to the size of the .lita section (this is
|
||
r_symndx) plus 1. We have already set the address of the
|
||
reloc to r_vaddr. */
|
||
if (r_size == ALPHA_R_NW_RELOC_SETGP)
|
||
{
|
||
gp_value = r_vaddr;
|
||
rel->addend = 0;
|
||
}
|
||
else if (r_size == ALPHA_R_NW_RELOC_LITA)
|
||
{
|
||
lita_address = r_vaddr;
|
||
rel->addend = r_symndx + 1;
|
||
}
|
||
else
|
||
BFD_ASSERT (0);
|
||
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (r_type == ALPHA_R_NW_RELOC)
|
||
rel->howto = &nlm32_alpha_nw_howto;
|
||
else
|
||
rel->howto = &nlm32_alpha_howto_table[r_type];
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Mangle Alpha NLM relocs for output. */
|
||
|
||
static bfd_boolean
|
||
nlm_alpha_mangle_relocs (abfd, sec, data, offset, count)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
asection *sec ATTRIBUTE_UNUSED;
|
||
PTR data ATTRIBUTE_UNUSED;
|
||
bfd_vma offset ATTRIBUTE_UNUSED;
|
||
bfd_size_type count ATTRIBUTE_UNUSED;
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* Read an ALPHA NLM import record */
|
||
|
||
static bfd_boolean
|
||
nlm_alpha_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 */
|
||
char *name;
|
||
bfd_size_type amt;
|
||
|
||
if (bfd_bread ((PTR) &symlength, (bfd_size_type) sizeof (symlength), abfd)
|
||
!= sizeof (symlength))
|
||
return FALSE;
|
||
sym -> symbol.the_bfd = abfd;
|
||
name = bfd_alloc (abfd, (bfd_size_type) symlength + 1);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength)
|
||
return FALSE;
|
||
name[symlength] = '\0';
|
||
sym -> symbol.name = name;
|
||
sym -> symbol.flags = 0;
|
||
sym -> symbol.value = 0;
|
||
sym -> symbol.section = bfd_und_section_ptr;
|
||
if (bfd_bread ((PTR) temp, (bfd_size_type) sizeof (temp), abfd)
|
||
!= sizeof (temp))
|
||
return FALSE;
|
||
rcount = H_GET_32 (abfd, temp);
|
||
amt = rcount * sizeof (struct nlm_relent);
|
||
nlm_relocs = (struct nlm_relent *) bfd_alloc (abfd, amt);
|
||
if (!nlm_relocs)
|
||
return FALSE;
|
||
sym -> relocs = nlm_relocs;
|
||
sym -> rcnt = 0;
|
||
while (sym -> rcnt < rcount)
|
||
{
|
||
asection *section;
|
||
|
||
if (! nlm_alpha_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc))
|
||
return FALSE;
|
||
nlm_relocs -> section = section;
|
||
nlm_relocs++;
|
||
sym -> rcnt++;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Write an Alpha NLM reloc. */
|
||
|
||
static bfd_boolean
|
||
nlm_alpha_write_import (abfd, sec, rel)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
arelent *rel;
|
||
{
|
||
asymbol *sym;
|
||
bfd_vma r_vaddr;
|
||
long r_symndx;
|
||
int r_type, r_extern, r_offset, r_size;
|
||
struct nlm32_alpha_external_reloc ext;
|
||
|
||
sym = *rel->sym_ptr_ptr;
|
||
|
||
/* Get values for the relocation fields. */
|
||
r_type = rel->howto->type;
|
||
if (r_type != ALPHA_R_NW_RELOC)
|
||
{
|
||
r_vaddr = bfd_get_section_vma (abfd, sec) + rel->address;
|
||
if ((sec->flags & SEC_CODE) == 0)
|
||
r_vaddr += bfd_section_size (abfd,
|
||
bfd_get_section_by_name (abfd,
|
||
NLM_CODE_NAME));
|
||
if (bfd_is_und_section (bfd_get_section (sym)))
|
||
{
|
||
r_extern = 1;
|
||
r_symndx = 0;
|
||
}
|
||
else
|
||
{
|
||
r_extern = 0;
|
||
if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
|
||
r_symndx = ALPHA_RELOC_SECTION_TEXT;
|
||
else
|
||
r_symndx = ALPHA_RELOC_SECTION_DATA;
|
||
}
|
||
r_offset = 0;
|
||
r_size = 0;
|
||
|
||
switch (r_type)
|
||
{
|
||
case ALPHA_R_LITUSE:
|
||
case ALPHA_R_GPDISP:
|
||
r_symndx = rel->addend;
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
r_size = rel->addend & 0xff;
|
||
r_offset = (rel->addend >> 8) & 0xff;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
case ALPHA_R_OP_PSUB:
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
r_vaddr = rel->addend;
|
||
break;
|
||
|
||
case ALPHA_R_IGNORE:
|
||
r_vaddr = rel->address;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* r_type == ALPHA_R_NW_RELOC */
|
||
r_vaddr = rel->address;
|
||
if (rel->addend == 0)
|
||
{
|
||
r_symndx = 0;
|
||
r_size = ALPHA_R_NW_RELOC_SETGP;
|
||
}
|
||
else
|
||
{
|
||
r_symndx = rel->addend - 1;
|
||
r_size = ALPHA_R_NW_RELOC_LITA;
|
||
}
|
||
r_extern = 0;
|
||
r_offset = 0;
|
||
}
|
||
|
||
/* Swap out the relocation fields. */
|
||
H_PUT_64 (abfd, r_vaddr, ext.r_vaddr);
|
||
H_PUT_32 (abfd, r_symndx, ext.r_symndx);
|
||
|
||
BFD_ASSERT (bfd_little_endian (abfd));
|
||
|
||
ext.r_bits[0] = ((r_type << RELOC_BITS0_TYPE_SH_LITTLE)
|
||
& RELOC_BITS0_TYPE_LITTLE);
|
||
ext.r_bits[1] = ((r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0)
|
||
| ((r_offset << RELOC_BITS1_OFFSET_SH_LITTLE)
|
||
& RELOC_BITS1_OFFSET_LITTLE));
|
||
ext.r_bits[2] = 0;
|
||
ext.r_bits[3] = ((r_size << RELOC_BITS3_SIZE_SH_LITTLE)
|
||
& RELOC_BITS3_SIZE_LITTLE);
|
||
|
||
/* Write out the relocation. */
|
||
if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Alpha NetWare does not use the high bit to determine whether a
|
||
public symbol is in the code segment or the data segment. Instead,
|
||
it just uses the address. The set_public_section and
|
||
get_public_offset routines override the default code which uses the
|
||
high bit. */
|
||
|
||
/* Set the section for a public symbol. */
|
||
|
||
static bfd_boolean
|
||
nlm_alpha_set_public_section (abfd, sym)
|
||
bfd *abfd;
|
||
nlmNAME(symbol_type) *sym;
|
||
{
|
||
asection *code_sec, *data_sec;
|
||
|
||
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
||
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
||
if (sym->symbol.value < bfd_section_size (abfd, code_sec))
|
||
{
|
||
sym->symbol.section = code_sec;
|
||
sym->symbol.flags |= BSF_FUNCTION;
|
||
}
|
||
else
|
||
{
|
||
sym->symbol.section = data_sec;
|
||
sym->symbol.value -= bfd_section_size (abfd, code_sec);
|
||
/* The data segment had better be aligned. */
|
||
BFD_ASSERT ((bfd_section_size (abfd, code_sec) & 0xf) == 0);
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* Get the offset to write out for a public symbol. */
|
||
|
||
static bfd_vma
|
||
nlm_alpha_get_public_offset (abfd, sym)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
asymbol *sym;
|
||
{
|
||
return bfd_asymbol_value (sym);
|
||
}
|
||
|
||
/* Write an Alpha NLM external symbol. */
|
||
|
||
static bfd_boolean
|
||
nlm_alpha_write_external (abfd, count, sym, relocs)
|
||
bfd *abfd;
|
||
bfd_size_type count;
|
||
asymbol *sym;
|
||
struct reloc_and_sec *relocs;
|
||
{
|
||
bfd_size_type i;
|
||
bfd_byte len;
|
||
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
||
arelent r;
|
||
|
||
len = strlen (sym->name);
|
||
if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd)
|
||
!= sizeof (bfd_byte))
|
||
|| bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len)
|
||
return FALSE;
|
||
|
||
bfd_put_32 (abfd, count + 2, temp);
|
||
if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
||
return FALSE;
|
||
|
||
/* The first two relocs for each external symbol are the .lita
|
||
address and the GP value. */
|
||
r.sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
r.howto = &nlm32_alpha_nw_howto;
|
||
|
||
r.address = nlm_alpha_backend_data (abfd)->lita_address;
|
||
r.addend = nlm_alpha_backend_data (abfd)->lita_size + 1;
|
||
if (! nlm_alpha_write_import (abfd, (asection *) NULL, &r))
|
||
return FALSE;
|
||
|
||
r.address = nlm_alpha_backend_data (abfd)->gp;
|
||
r.addend = 0;
|
||
if (! nlm_alpha_write_import (abfd, (asection *) NULL, &r))
|
||
return FALSE;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
if (! nlm_alpha_write_import (abfd, relocs[i].sec, relocs[i].rel))
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#include "nlmswap.h"
|
||
|
||
static const struct nlm_backend_data nlm32_alpha_backend =
|
||
{
|
||
"NetWare Alpha Module \032",
|
||
sizeof (Nlm32_alpha_External_Fixed_Header),
|
||
sizeof (struct nlm32_alpha_external_prefix_header),
|
||
bfd_arch_alpha,
|
||
0,
|
||
TRUE, /* no uninitialized data permitted by Alpha NetWare. */
|
||
nlm_alpha_backend_object_p,
|
||
nlm_alpha_write_prefix,
|
||
nlm_alpha_read_reloc,
|
||
nlm_alpha_mangle_relocs,
|
||
nlm_alpha_read_import,
|
||
nlm_alpha_write_import,
|
||
nlm_alpha_set_public_section,
|
||
nlm_alpha_get_public_offset,
|
||
nlm_swap_fixed_header_in,
|
||
nlm_swap_fixed_header_out,
|
||
nlm_alpha_write_external,
|
||
0, /* write_export */
|
||
};
|
||
|
||
#define TARGET_LITTLE_NAME "nlm32-alpha"
|
||
#define TARGET_LITTLE_SYM nlmNAME(alpha_vec)
|
||
#define TARGET_BACKEND_DATA &nlm32_alpha_backend
|
||
|
||
#include "nlm-target.h"
|