192 lines
6.2 KiB
C
192 lines
6.2 KiB
C
/* ELF32/HPPA support
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This file contains ELF32/HPPA relocation support as specified
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in the Stratus FTX/Golf Object File Format (SED-1762) dated
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November 19, 1992.
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Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
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Written by:
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Center for Software Science
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Department of Computer Science
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University of Utah
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _ELF32_HPPA_H
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#define _ELF32_HPPA_H
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#include "libelf.h"
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#include "libhppa.h"
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#include "elf/hppa.h"
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/* ELF/HPPA relocation types */
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typedef enum
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{
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/* Address relocation types
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These relocation types do simple base + offset relocations. */
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R_PARISC_NONE = 0x00,
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R_PARISC_DIR32 = 0x01,
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R_PARISC_DIR21L = 0x02,
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R_PARISC_DIR17R = 0x03,
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R_PARISC_DIR17F = 0x04,
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R_PARISC_DIR14R = 0x06,
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/* PC-relative relocation types
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Typically used for calls.
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Note PCREL17C and PCREL17F differ only in overflow handling.
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PCREL17C never reports a relocation error.
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When supporting argument relocations, function calls must be
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accompanied by parameter relocation information. This information is
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carried in the ten high-order bits of the addend field. The remaining
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22 bits of of the addend field are sign-extended to form the Addend.
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Note the code to build argument relocations depends on the
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addend being zero. A consequence of this limitation is GAS
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can not perform relocation reductions for function symbols. */
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R_PARISC_PCREL21L = 0x0a,
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R_PARISC_PCREL17R = 0x0b,
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R_PARISC_PCREL17F = 0x0c,
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R_PARISC_PCREL17C = 0x0d,
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R_PARISC_PCREL14R = 0x0e,
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R_PARISC_PCREL14F = 0x0f,
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/* DP-relative relocation types. */
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R_PARISC_DPREL21L = 0x12,
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R_PARISC_DPREL14R = 0x16,
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R_PARISC_DPREL14F = 0x17,
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/* Data linkage table (DLT) relocation types
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SOM DLT_REL fixup requests are used to for static data references
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from position-independent code within shared libraries. They are
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similar to the GOT relocation types in some SVR4 implementations. */
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R_PARISC_DLTREL21L = 0x1a,
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R_PARISC_DLTREL14R = 0x1e,
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R_PARISC_DLTREL14F = 0x1f,
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/* DLT indirect relocation types */
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R_PARISC_DLTIND21L = 0x22,
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R_PARISC_DLTIND14R = 0x26,
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R_PARISC_DLTIND14F = 0x27,
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/* Base relative relocation types. Ugh. These imply lots of state */
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R_PARISC_SETBASE = 0x28,
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R_PARISC_BASEREL32 = 0x29,
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R_PARISC_BASEREL21L = 0x2a,
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R_PARISC_BASEREL17R = 0x2b,
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R_PARISC_BASEREL17F = 0x2c,
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R_PARISC_BASEREL14R = 0x2e,
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R_PARISC_BASEREL14F = 0x2f,
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/* Segment relative relocation types. */
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R_PARISC_TEXTREL32 = 0x31,
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R_PARISC_DATAREL32 = 0x39,
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/* Plabel relocation types. */
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R_PARISC_PLABEL32 = 0x41,
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R_PARISC_PLABEL21L = 0x42,
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R_PARISC_PLABEL14R = 0x46,
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/* PLT relocations. */
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R_PARISC_PLTIND21L = 0x82,
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R_PARISC_PLTIND14R = 0x86,
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R_PARISC_PLTIND14F = 0x87,
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/* Misc relocation types. */
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R_PARISC_COPY = 0x88,
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R_PARISC_GLOB_DAT = 0x89,
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R_PARISC_JMP_SLOT = 0x8a,
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R_PARISC_RELATIVE = 0x8b,
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R_PARISC_STUB_CALL_17 = 0x8c,
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R_PARISC_UNIMPLEMENTED,
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}
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elf32_hppa_reloc_type;
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#define ELF_HOWTO_TABLE_SIZE R_PARISC_UNIMPLEMENTED + 1
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#define N_PARISC_RELOCS R_PARISC_UNIMPLEMENTED + 1
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/* Define groups of basic relocations. FIXME: These should
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be the only basic relocations created by GAS. The rest
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should be internal to the BFD backend.
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The idea is both SOM and ELF define these basic relocation
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types so they map into a SOM or ELF specific relocation
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as appropriate. This allows GAS to share much more code
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between the two target object formats. */
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#define R_HPPA_NONE R_PARISC_NONE
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#define R_HPPA R_PARISC_DIR32
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#define R_HPPA_GOTOFF R_PARISC_DPREL21L
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#define R_HPPA_PCREL_CALL R_PARISC_PCREL21L
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/* HPPA symbol table extension entry types */
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enum elf32_hppa_symextn_types
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{
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PARISC_SXT_NULL,
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PARISC_SXT_SYMNDX,
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PARISC_SXT_ARG_RELOC,
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};
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/* These macros compose and decompose the value of a symextn entry:
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entry_type = ELF32_PARISC_SX_TYPE(word);
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entry_value = ELF32_PARISC_SX_VAL(word);
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word = ELF32_PARISC_SX_WORD(type,val); */
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#define ELF32_PARISC_SX_TYPE(p) ((p) >> 24)
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#define ELF32_PARISC_SX_VAL(p) ((p) & 0xFFFFFF)
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#define ELF32_PARISC_SX_WORD(type,val) (((type) << 24) + (val & 0xFFFFFF))
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/* The following was added facilitate implementation of the .hppa_symextn
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section. This section is built after the symbol table is built in the
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elf_write_object_contents routine (called from bfd_close). It is built
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so late because it requires information that is not known until
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the symbol and string table sections have been allocated, and
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the symbol table has been built. */
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/* Number of "hand-made" target specific sections. */
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#define ELF_TC_FAKE_SECTIONS 1
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#define SYMEXTN_SECTION_NAME ".PARISC.symext"
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/* FIXME. Are these external? (For example used by GAS?). If so the
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names need to change to avoid namespace pollution, if not they should
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be moved into elf32-hppa.c. */
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typedef unsigned long symext_entryS;
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struct symext_chain
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{
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symext_entryS entry;
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struct symext_chain *next;
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};
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typedef struct symext_chain symext_chainS;
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elf32_hppa_reloc_type **hppa_elf_gen_reloc_type
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PARAMS ((bfd *, elf32_hppa_reloc_type, int, int));
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asymbol * hppa_look_for_stubs_in_section
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PARAMS ((bfd *, bfd *, bfd *, asection *,
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int *, struct bfd_link_info *));
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void elf_hppa_final_processing PARAMS ((void));
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#endif /* _ELF32_HPPA_H */
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