binutils-gdb/include/elf/ppc.h

/* PPC ELF support for BFD.
   Copyright 1995, 1996, 1998, 2000, 2001, 2002, 2003, 2005, 2007, 2008,
   2009, 2010 Free Software Foundation, Inc.

   By Michael Meissner, Cygnus Support, <meissner@cygnus.com>,
   from information in the System V Application Binary Interface,
   PowerPC Processor Supplement and the PowerPC Embedded Application
   Binary Interface (eabi).

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

/* This file holds definitions specific to the PPC ELF ABI.  Note
   that most of this is not actually implemented by BFD.  */

#ifndef _ELF_PPC_H
#define _ELF_PPC_H

#include "elf/reloc-macros.h"

/* Relocations.  */
START_RELOC_NUMBERS (elf_ppc_reloc_type)
  RELOC_NUMBER (R_PPC_NONE,		  0)
  RELOC_NUMBER (R_PPC_ADDR32,		  1)
  RELOC_NUMBER (R_PPC_ADDR24,		  2)
  RELOC_NUMBER (R_PPC_ADDR16,		  3)
  RELOC_NUMBER (R_PPC_ADDR16_LO,	  4)
  RELOC_NUMBER (R_PPC_ADDR16_HI,	  5)
  RELOC_NUMBER (R_PPC_ADDR16_HA,	  6)
  RELOC_NUMBER (R_PPC_ADDR14,		  7)
  RELOC_NUMBER (R_PPC_ADDR14_BRTAKEN,	  8)
  RELOC_NUMBER (R_PPC_ADDR14_BRNTAKEN,	  9)
  RELOC_NUMBER (R_PPC_REL24,		 10)
  RELOC_NUMBER (R_PPC_REL14,		 11)
  RELOC_NUMBER (R_PPC_REL14_BRTAKEN,	 12)
  RELOC_NUMBER (R_PPC_REL14_BRNTAKEN,	 13)
  RELOC_NUMBER (R_PPC_GOT16,		 14)
  RELOC_NUMBER (R_PPC_GOT16_LO,		 15)
  RELOC_NUMBER (R_PPC_GOT16_HI,		 16)
  RELOC_NUMBER (R_PPC_GOT16_HA,		 17)
  RELOC_NUMBER (R_PPC_PLTREL24,		 18)
  RELOC_NUMBER (R_PPC_COPY,		 19)
  RELOC_NUMBER (R_PPC_GLOB_DAT,		 20)
  RELOC_NUMBER (R_PPC_JMP_SLOT,		 21)
  RELOC_NUMBER (R_PPC_RELATIVE,		 22)
  RELOC_NUMBER (R_PPC_LOCAL24PC,	 23)
  RELOC_NUMBER (R_PPC_UADDR32,		 24)
  RELOC_NUMBER (R_PPC_UADDR16,		 25)
  RELOC_NUMBER (R_PPC_REL32,		 26)
  RELOC_NUMBER (R_PPC_PLT32,		 27)
  RELOC_NUMBER (R_PPC_PLTREL32,		 28)
  RELOC_NUMBER (R_PPC_PLT16_LO,		 29)
  RELOC_NUMBER (R_PPC_PLT16_HI,		 30)
  RELOC_NUMBER (R_PPC_PLT16_HA,		 31)
  RELOC_NUMBER (R_PPC_SDAREL16,		 32)
  RELOC_NUMBER (R_PPC_SECTOFF,		 33)
  RELOC_NUMBER (R_PPC_SECTOFF_LO,	 34)
  RELOC_NUMBER (R_PPC_SECTOFF_HI,	 35)
  RELOC_NUMBER (R_PPC_SECTOFF_HA,	 36)
  RELOC_NUMBER (R_PPC_ADDR30,		 37)

#ifndef RELOC_MACROS_GEN_FUNC
/* Fake relocations for branch stubs, only used internally by ld.  */
  RELOC_NUMBER (R_PPC_RELAX,		 48)
  RELOC_NUMBER (R_PPC_RELAX_PLT,	 49)
  RELOC_NUMBER (R_PPC_RELAX_PLTREL24,	 50)
#endif

  /* Relocs added to support TLS.  */
  RELOC_NUMBER (R_PPC_TLS,		 67)
  RELOC_NUMBER (R_PPC_DTPMOD32,		 68)
  RELOC_NUMBER (R_PPC_TPREL16,		 69)
  RELOC_NUMBER (R_PPC_TPREL16_LO,	 70)
  RELOC_NUMBER (R_PPC_TPREL16_HI,	 71)
  RELOC_NUMBER (R_PPC_TPREL16_HA,	 72)
  RELOC_NUMBER (R_PPC_TPREL32,		 73)
  RELOC_NUMBER (R_PPC_DTPREL16,		 74)
  RELOC_NUMBER (R_PPC_DTPREL16_LO,	 75)
  RELOC_NUMBER (R_PPC_DTPREL16_HI,	 76)
  RELOC_NUMBER (R_PPC_DTPREL16_HA,	 77)
  RELOC_NUMBER (R_PPC_DTPREL32,		 78)
  RELOC_NUMBER (R_PPC_GOT_TLSGD16,	 79)
  RELOC_NUMBER (R_PPC_GOT_TLSGD16_LO,	 80)
  RELOC_NUMBER (R_PPC_GOT_TLSGD16_HI,	 81)
  RELOC_NUMBER (R_PPC_GOT_TLSGD16_HA,	 82)
  RELOC_NUMBER (R_PPC_GOT_TLSLD16,	 83)
  RELOC_NUMBER (R_PPC_GOT_TLSLD16_LO,	 84)
  RELOC_NUMBER (R_PPC_GOT_TLSLD16_HI,	 85)
  RELOC_NUMBER (R_PPC_GOT_TLSLD16_HA,	 86)
  RELOC_NUMBER (R_PPC_GOT_TPREL16,	 87)
  RELOC_NUMBER (R_PPC_GOT_TPREL16_LO,	 88)
  RELOC_NUMBER (R_PPC_GOT_TPREL16_HI,	 89)
  RELOC_NUMBER (R_PPC_GOT_TPREL16_HA,	 90)
  RELOC_NUMBER (R_PPC_GOT_DTPREL16,	 91)
  RELOC_NUMBER (R_PPC_GOT_DTPREL16_LO,	 92)
  RELOC_NUMBER (R_PPC_GOT_DTPREL16_HI,	 93)
  RELOC_NUMBER (R_PPC_GOT_DTPREL16_HA,	 94)
  RELOC_NUMBER (R_PPC_TLSGD,		 95)
  RELOC_NUMBER (R_PPC_TLSLD,		 96)

/* The remaining relocs are from the Embedded ELF ABI, and are not
   in the SVR4 ELF ABI.  */
  RELOC_NUMBER (R_PPC_EMB_NADDR32,	101)
  RELOC_NUMBER (R_PPC_EMB_NADDR16,	102)
  RELOC_NUMBER (R_PPC_EMB_NADDR16_LO,	103)
  RELOC_NUMBER (R_PPC_EMB_NADDR16_HI,	104)
  RELOC_NUMBER (R_PPC_EMB_NADDR16_HA,	105)
  RELOC_NUMBER (R_PPC_EMB_SDAI16,	106)
  RELOC_NUMBER (R_PPC_EMB_SDA2I16,	107)
  RELOC_NUMBER (R_PPC_EMB_SDA2REL,	108)
  RELOC_NUMBER (R_PPC_EMB_SDA21,	109)
  RELOC_NUMBER (R_PPC_EMB_MRKREF,	110)
  RELOC_NUMBER (R_PPC_EMB_RELSEC16,	111)
  RELOC_NUMBER (R_PPC_EMB_RELST_LO,	112)
  RELOC_NUMBER (R_PPC_EMB_RELST_HI,	113)
  RELOC_NUMBER (R_PPC_EMB_RELST_HA,	114)
  RELOC_NUMBER (R_PPC_EMB_BIT_FLD,	115)
  RELOC_NUMBER (R_PPC_EMB_RELSDA,	116)

/* Support STT_GNU_IFUNC plt calls.  */
  RELOC_NUMBER (R_PPC_IRELATIVE,	248)

/* These are GNU extensions used in PIC code sequences.  */
  RELOC_NUMBER (R_PPC_REL16,		249)
  RELOC_NUMBER (R_PPC_REL16_LO,		250)
  RELOC_NUMBER (R_PPC_REL16_HI,		251)
  RELOC_NUMBER (R_PPC_REL16_HA,		252)

/* These are GNU extensions to enable C++ vtable garbage collection.  */
  RELOC_NUMBER (R_PPC_GNU_VTINHERIT,	253)
  RELOC_NUMBER (R_PPC_GNU_VTENTRY,	254)

/* This is a phony reloc to handle any old fashioned TOC16 references
   that may still be in object files.  */
  RELOC_NUMBER (R_PPC_TOC16,		255)

END_RELOC_NUMBERS (R_PPC_max)

#define IS_PPC_TLS_RELOC(R) \
  ((R) >= R_PPC_TLS && (R) <= R_PPC_GOT_DTPREL16_HA)

/* Specify the value of _GLOBAL_OFFSET_TABLE_.  */
#define DT_PPC_GOT		(DT_LOPROC)

/* Specify that tls descriptors should be optimized.  */
#define DT_PPC_TLSOPT		(DT_LOPROC + 1)

/* Processor specific flags for the ELF header e_flags field.  */

#define	EF_PPC_EMB		0x80000000	/* PowerPC embedded flag.  */

#define	EF_PPC_RELOCATABLE	0x00010000	/* PowerPC -mrelocatable flag.  */
#define	EF_PPC_RELOCATABLE_LIB	0x00008000	/* PowerPC -mrelocatable-lib flag.  */

/* Processor specific section headers, sh_type field.  */

#define SHT_ORDERED		SHT_HIPROC	/* Link editor is to sort the \
						   entries in this section \
						   based on the address \
						   specified in the associated \
						   symbol table entry.  */

/* Object attribute tags.  */
enum
{
  /* 0-3 are generic.  */
  Tag_GNU_Power_ABI_FP = 4, /* Value 1 for hard-float, 2 for
			       soft-float, 3 for single=precision 
			       hard-float; 0 for not tagged or not
			       using any ABIs affected by the
			       differences.  */

  /* Value 1 for general purpose registers only, 2 for AltiVec
     registers, 3 for SPE registers; 0 for not tagged or not using any
     ABIs affected by the differences.  */
  Tag_GNU_Power_ABI_Vector = 8,

  /* Value 1 for ABIs using r3/r4 for returning structures <= 8 bytes,
     2 for ABIs using memory; 0 for not tagged or not using any ABIs
     affected by the differences.  */
  Tag_GNU_Power_ABI_Struct_Return = 12
};

#endif /* _ELF_PPC_H */