987 lines
30 KiB
C
987 lines
30 KiB
C
/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
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Copyright (C) 1994-2017 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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/* The format of a PowerPC NLM changed. Define OLDFORMAT to get the
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old format. */
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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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#ifdef OLDFORMAT
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/* The prefix header is only used in the old format. */
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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 bfd_boolean
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nlm_powerpc_backend_object_p (bfd *abfd)
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{
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struct nlm32_powerpc_external_prefix_header s;
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if (bfd_bread (& s, (bfd_size_type) sizeof s, 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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|| 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 bfd_boolean
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nlm_powerpc_write_prefix (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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H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion);
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H_PUT_32 (abfd, 0, s.origins);
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/* FIXME: What should we do about the date? */
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if (bfd_bwrite (& 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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/* This reloc handling is only applicable to the old format. */
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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, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel 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, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel 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, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel 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, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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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, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* 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. */
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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_GL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Local TOC relative symbol. */
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HOWTO (6, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_TCL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 7 },
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/* Non modifiable absolute branch. */
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HOWTO (8, /* 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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0, /* Special_function. */
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"R_BA", /* Name. */
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TRUE, /* Partial_inplace. */
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0x3fffffc, /* Source mask. */
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0x3fffffc, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 9 },
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/* Non modifiable relative branch. */
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HOWTO (0xa, /* 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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0, /* Special_function. */
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"R_BR", /* Name. */
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TRUE, /* Partial_inplace. */
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0x3fffffc, /* Source mask. */
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0x3fffffc, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 0xb },
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/* Indirect load. */
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HOWTO (0xc, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Load address. */
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HOWTO (0xd, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RLA", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 0xe },
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/* Non-relocating reference. */
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HOWTO (0xf, /* 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_REF", /* Name. */
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FALSE, /* Partial_inplace. */
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0, /* Source mask. */
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0, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 0x10 },
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{ 0x11 },
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/* TOC relative indirect load. */
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HOWTO (0x12, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_TRL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* TOC relative load address. */
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HOWTO (0x13, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_TRLA", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable relative branch. */
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HOWTO (0x14, /* 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_RRTBI", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable absolute branch. */
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HOWTO (0x15, /* 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_RRTBA", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable call absolute indirect. */
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HOWTO (0x16, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_CAI", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable call relative. */
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HOWTO (0x17, /* 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_bitfield, /* 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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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable branch absolute. */
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HOWTO (0x18, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RBA", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable branch absolute. */
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HOWTO (0x19, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RBAC", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable branch relative. */
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HOWTO (0x1a, /* 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_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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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Modifiable branch absolute. */
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HOWTO (0x1b, /* 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_bitfield, /* 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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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE) /* PC rel offset. */
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};
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#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \
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/ sizeof nlm_powerpc_howto_table[0])
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/* Read a PowerPC NLM reloc. */
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static bfd_boolean
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nlm_powerpc_read_reloc (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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struct nlm32_powerpc_external_reloc ext;
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bfd_vma l_vaddr;
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unsigned long l_symndx;
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int l_rtype;
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int l_rsecnm;
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asection *code_sec, *data_sec, *bss_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 fields. */
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l_vaddr = H_GET_32 (abfd, ext.l_vaddr);
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l_symndx = H_GET_32 (abfd, ext.l_symndx);
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l_rtype = H_GET_16 (abfd, ext.l_rtype);
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l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm);
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/* Get the sections now, for convenience. */
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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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bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
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/* Work out the arelent fields. */
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if (sym != NULL)
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/* This is an import. sym_ptr_ptr is filled in by
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nlm_canonicalize_reloc. */
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rel->sym_ptr_ptr = NULL;
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else
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{
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asection *sec;
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if (l_symndx == 0)
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sec = code_sec;
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else if (l_symndx == 1)
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sec = data_sec;
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else if (l_symndx == 2)
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sec = bss_sec;
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else
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{
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bfd_set_error (bfd_error_bad_value);
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return FALSE;
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}
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rel->sym_ptr_ptr = sec->symbol_ptr_ptr;
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}
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rel->addend = 0;
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BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT);
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rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff);
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BFD_ASSERT (rel->howto->name != NULL
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&& ((l_rtype & 0x8000) != 0
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? (rel->howto->complain_on_overflow
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== complain_overflow_signed)
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: (rel->howto->complain_on_overflow
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== complain_overflow_bitfield))
|
||
&& ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1);
|
||
|
||
if (l_rsecnm == 0)
|
||
*secp = code_sec;
|
||
else if (l_rsecnm == 1)
|
||
{
|
||
*secp = data_sec;
|
||
l_vaddr -= code_sec->size;
|
||
}
|
||
else
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
rel->address = l_vaddr;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#else /* not OLDFORMAT */
|
||
|
||
/* There is only one type of reloc in a PowerPC NLM. */
|
||
|
||
static reloc_howto_type nlm_powerpc_howto =
|
||
HOWTO (0, /* 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. */
|
||
"32", /* Name. */
|
||
TRUE, /* Partial_inplace. */
|
||
0xffffffff, /* Source mask. */
|
||
0xffffffff, /* Dest mask. */
|
||
FALSE); /* PC rel_offset. */
|
||
|
||
/* Read a PowerPC NLM reloc. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_read_reloc (bfd *abfd,
|
||
nlmNAME (symbol_type) *sym,
|
||
asection **secp,
|
||
arelent *rel)
|
||
{
|
||
bfd_byte temp[4];
|
||
bfd_vma val;
|
||
const char *name;
|
||
|
||
if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
||
return FALSE;
|
||
|
||
val = bfd_get_32 (abfd, temp);
|
||
|
||
/* The value is a word offset into either the code or data segment.
|
||
This is the location which needs to be adjusted.
|
||
|
||
The high bit is 0 if the value is an offset into the data
|
||
segment, or 1 if the value is an offset into the text segment.
|
||
|
||
If this is a relocation fixup rather than an imported symbol (the
|
||
sym argument is NULL), then the second most significant bit is 0
|
||
if the address of the data segment should be added to the
|
||
location addressed by the value, or 1 if the address of the text
|
||
segment should be added.
|
||
|
||
If this is an imported symbol, the second most significant bit is
|
||
not used and must be 0. */
|
||
|
||
if ((val & NLM_HIBIT) == 0)
|
||
name = NLM_INITIALIZED_DATA_NAME;
|
||
else
|
||
{
|
||
name = NLM_CODE_NAME;
|
||
val &=~ NLM_HIBIT;
|
||
}
|
||
*secp = bfd_get_section_by_name (abfd, name);
|
||
|
||
if (sym == NULL)
|
||
{
|
||
if ((val & (NLM_HIBIT >> 1)) == 0)
|
||
name = NLM_INITIALIZED_DATA_NAME;
|
||
else
|
||
{
|
||
name = NLM_CODE_NAME;
|
||
val &=~ (NLM_HIBIT >> 1);
|
||
}
|
||
rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
|
||
}
|
||
|
||
rel->howto = & nlm_powerpc_howto;
|
||
rel->address = val << 2;
|
||
rel->addend = 0;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#endif /* not OLDFORMAT */
|
||
|
||
/* Mangle PowerPC NLM relocs for output. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_mangle_relocs (bfd *abfd ATTRIBUTE_UNUSED,
|
||
asection *sec ATTRIBUTE_UNUSED,
|
||
const void * data ATTRIBUTE_UNUSED,
|
||
bfd_vma offset ATTRIBUTE_UNUSED,
|
||
bfd_size_type count ATTRIBUTE_UNUSED)
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* Read a PowerPC NLM import record */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_read_import (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;
|
||
|
||
if (bfd_bread (& 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 (temp, (bfd_size_type) sizeof (temp), abfd)
|
||
!= sizeof (temp))
|
||
return FALSE;
|
||
rcount = H_GET_32 (abfd, temp);
|
||
nlm_relocs = bfd_alloc (abfd, rcount * sizeof (struct nlm_relent));
|
||
if (nlm_relocs == NULL)
|
||
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))
|
||
return FALSE;
|
||
nlm_relocs -> section = section;
|
||
nlm_relocs++;
|
||
sym -> rcnt++;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
#ifndef OLDFORMAT
|
||
|
||
/* Write a PowerPC NLM reloc. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel)
|
||
{
|
||
asymbol *sym;
|
||
bfd_vma val;
|
||
bfd_byte temp[4];
|
||
|
||
/* PowerPC NetWare only supports one kind of reloc. */
|
||
if (rel->addend != 0
|
||
|| rel->howto == NULL
|
||
|| rel->howto->rightshift != 0
|
||
|| rel->howto->size != 2
|
||
|| rel->howto->bitsize != 32
|
||
|| rel->howto->bitpos != 0
|
||
|| rel->howto->pc_relative
|
||
|| (rel->howto->src_mask != 0xffffffff && rel->addend != 0)
|
||
|| rel->howto->dst_mask != 0xffffffff)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return FALSE;
|
||
}
|
||
|
||
sym = *rel->sym_ptr_ptr;
|
||
|
||
/* The value we write out is the offset into the appropriate
|
||
segment, rightshifted by two. This offset is the section vma,
|
||
adjusted by the vma of the lowest section in that segment, plus
|
||
the address of the relocation. */
|
||
val = bfd_get_section_vma (abfd, sec) + rel->address;
|
||
if ((val & 3) != 0)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
val >>= 2;
|
||
|
||
/* The high bit is 0 if the reloc is in the data section, or 1 if
|
||
the reloc is in the code section. */
|
||
if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
|
||
val -= nlm_get_data_low (abfd);
|
||
else
|
||
{
|
||
val -= nlm_get_text_low (abfd);
|
||
val |= NLM_HIBIT;
|
||
}
|
||
|
||
if (! bfd_is_und_section (bfd_get_section (sym)))
|
||
{
|
||
/* This is an internal relocation fixup. The second most
|
||
significant bit is 0 if this is a reloc against the data
|
||
segment, or 1 if it is a reloc against the text segment. */
|
||
if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
|
||
val |= NLM_HIBIT >> 1;
|
||
}
|
||
|
||
bfd_put_32 (abfd, val, temp);
|
||
if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#else /* OLDFORMAT */
|
||
|
||
/* This is used for the reloc handling in the old format. */
|
||
|
||
/* Write a PowerPC NLM reloc. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_write_reloc (bfd *abfd,
|
||
asection *sec,
|
||
arelent *rel,
|
||
int indx)
|
||
{
|
||
struct nlm32_powerpc_external_reloc ext;
|
||
asection *code_sec, *data_sec, *bss_sec;
|
||
asymbol *sym;
|
||
asection *symsec;
|
||
unsigned long l_symndx;
|
||
int l_rtype;
|
||
int l_rsecnm;
|
||
reloc_howto_type *howto;
|
||
bfd_size_type address;
|
||
|
||
/* Get the sections now, for convenience. */
|
||
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
||
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
||
bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
|
||
|
||
sym = *rel->sym_ptr_ptr;
|
||
symsec = bfd_get_section (sym);
|
||
if (indx != -1)
|
||
{
|
||
BFD_ASSERT (bfd_is_und_section (symsec));
|
||
l_symndx = indx + 3;
|
||
}
|
||
else
|
||
{
|
||
if (symsec == code_sec)
|
||
l_symndx = 0;
|
||
else if (symsec == data_sec)
|
||
l_symndx = 1;
|
||
else if (symsec == bss_sec)
|
||
l_symndx = 2;
|
||
else
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
H_PUT_32 (abfd, 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
|
||
|| (! rel->howto->partial_inplace
|
||
&& rel->addend == 0))
|
||
&& (howto->src_mask == rel->howto->src_mask
|
||
|| (rel->howto->src_mask == 0
|
||
&& rel->addend == 0))
|
||
&& 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;
|
||
H_PUT_16 (abfd, l_rtype, ext.l_rtype);
|
||
|
||
address = rel->address;
|
||
|
||
if (sec == code_sec)
|
||
l_rsecnm = 0;
|
||
else if (sec == data_sec)
|
||
{
|
||
l_rsecnm = 1;
|
||
address += code_sec->size;
|
||
}
|
||
else
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm);
|
||
H_PUT_32 (abfd, address, ext.l_vaddr);
|
||
|
||
if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Write a PowerPC NLM import. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel)
|
||
{
|
||
return nlm_powerpc_write_reloc (abfd, sec, rel, -1);
|
||
}
|
||
|
||
#endif /* OLDFORMAT */
|
||
|
||
/* Write a PowerPC NLM external symbol. This routine keeps a static
|
||
count of the symbol index. FIXME: I don't know if this is
|
||
necessary, and the index never gets reset. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_write_external (bfd *abfd,
|
||
bfd_size_type count,
|
||
asymbol *sym,
|
||
struct reloc_and_sec *relocs)
|
||
{
|
||
unsigned int i;
|
||
bfd_byte len;
|
||
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
||
#ifdef OLDFORMAT
|
||
static int indx;
|
||
#endif
|
||
|
||
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, temp);
|
||
if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
||
return FALSE;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
#ifndef OLDFORMAT
|
||
if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel))
|
||
return FALSE;
|
||
#else
|
||
if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec,
|
||
relocs[i].rel, indx))
|
||
return FALSE;
|
||
#endif
|
||
}
|
||
|
||
#ifdef OLDFORMAT
|
||
++indx;
|
||
#endif
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#ifndef OLDFORMAT
|
||
|
||
/* PowerPC Netware uses a word offset, not a byte offset, for public
|
||
symbols. */
|
||
|
||
/* Set the section for a public symbol. */
|
||
|
||
static bfd_boolean
|
||
nlm_powerpc_set_public_section (bfd *abfd, nlmNAME (symbol_type) *sym)
|
||
{
|
||
if (sym->symbol.value & NLM_HIBIT)
|
||
{
|
||
sym->symbol.value &= ~NLM_HIBIT;
|
||
sym->symbol.flags |= BSF_FUNCTION;
|
||
sym->symbol.section =
|
||
bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
||
}
|
||
else
|
||
sym->symbol.section =
|
||
bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
||
|
||
sym->symbol.value <<= 2;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Get the offset to write out for a public symbol. */
|
||
|
||
static bfd_vma
|
||
nlm_powerpc_get_public_offset (bfd *abfd, asymbol *sym)
|
||
{
|
||
bfd_vma offset;
|
||
asection *sec;
|
||
|
||
offset = bfd_asymbol_value (sym);
|
||
sec = bfd_get_section (sym);
|
||
if (sec->flags & SEC_CODE)
|
||
{
|
||
offset -= nlm_get_text_low (abfd);
|
||
offset |= NLM_HIBIT;
|
||
}
|
||
else if (sec->flags & (SEC_DATA | SEC_ALLOC))
|
||
{
|
||
/* SEC_ALLOC is for the .bss section. */
|
||
offset -= nlm_get_data_low (abfd);
|
||
}
|
||
else
|
||
{
|
||
/* We can't handle an exported symbol that is not in the code or
|
||
data segment. */
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
/* FIXME: No way to return error. */
|
||
abort ();
|
||
}
|
||
|
||
return offset;
|
||
}
|
||
|
||
#endif /* ! defined (OLDFORMAT) */
|
||
|
||
#include "nlmswap.h"
|
||
|
||
static const struct nlm_backend_data nlm32_powerpc_backend =
|
||
{
|
||
"NetWare PowerPC Module \032",
|
||
sizeof (Nlm32_powerpc_External_Fixed_Header),
|
||
#ifndef OLDFORMAT
|
||
0, /* Optional_prefix_size. */
|
||
#else
|
||
sizeof (struct nlm32_powerpc_external_prefix_header),
|
||
#endif
|
||
bfd_arch_powerpc,
|
||
0,
|
||
FALSE,
|
||
#ifndef OLDFORMAT
|
||
0, /* Backend_object_p. */
|
||
0, /* Write_prefix. */
|
||
#else
|
||
nlm_powerpc_backend_object_p,
|
||
nlm_powerpc_write_prefix,
|
||
#endif
|
||
nlm_powerpc_read_reloc,
|
||
nlm_powerpc_mangle_relocs,
|
||
nlm_powerpc_read_import,
|
||
nlm_powerpc_write_import,
|
||
#ifndef OLDFORMAT
|
||
nlm_powerpc_set_public_section,
|
||
nlm_powerpc_get_public_offset,
|
||
#else
|
||
0, /* Set_public_section. */
|
||
0, /* Get_public_offset. */
|
||
#endif
|
||
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 powerpc_nlm32_vec
|
||
#define TARGET_BACKEND_DATA & nlm32_powerpc_backend
|
||
|
||
#include "nlm-target.h"
|