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/* MIPS ELF support for BFD.

   Copyright (C) 1993, 1994 Free Software Foundation, Inc.

   By Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>, from

   information in the System V Application Binary Interface, MIPS

   Processor Supplement.

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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* This file holds definitions specific to the MIPS ELF ABI.  Note

   that most of this is not actually implemented by BFD.  */

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

/* At least one .noreorder directive appears in the source.  */

#define EF_MIPS_NOREORDER       0x00000001

/* File contains position independent code.  */

#define EF_MIPS_PIC             0x00000002

/* Code in file uses the standard calling sequence for calling

   position independent code.  */

#define EF_MIPS_CPIC            0x00000004

/* Four bit MIPS architecture field.  */

#define EF_MIPS_ARCH            0xf0000000

/* -mips1 code.  */

#define E_MIPS_ARCH_1           0x00000000

/* -mips2 code.  */

#define E_MIPS_ARCH_2           0x10000000

/* -mips3 code.  */

#define E_MIPS_ARCH_3           0x20000000

/* Processor specific section indices.  These sections do not actually

   exist.  Symbols with a st_shndx field corresponding to one of these

   values have a special meaning.  */

/* Defined and allocated common symbol.  Value is virtual address.  If

   relocated, alignment must be preserved.  */

#define SHN_MIPS_ACOMMON        0xff00

/* Defined and allocated text symbol.  Value is virtual address.

   Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables.  */

#define SHN_MIPS_TEXT           0xff01

/* Defined and allocated data symbol.  Value is virtual address.

   Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables.  */

#define SHN_MIPS_DATA           0xff02

/* Small common symbol.  */

#define SHN_MIPS_SCOMMON        0xff03

/* Small undefined symbol.  */

#define SHN_MIPS_SUNDEFINED     0xff04

/* Processor specific section types.  */

/* Section contains the set of dynamic shared objects used when

   statically linking.  */

#define SHT_MIPS_LIBLIST        0x70000000

/* I'm not sure what this is, but it's used on Irix 5.  */

#define SHT_MIPS_MSYM           0x70000001

/* Section contains list of symbols whose definitions conflict with

   symbols defined in shared objects.  */

#define SHT_MIPS_CONFLICT       0x70000002

/* Section contains the global pointer table.  */

#define SHT_MIPS_GPTAB          0x70000003

/* Section contains microcode information.  The exact format is

   unspecified.  */

#define SHT_MIPS_UCODE          0x70000004

/* Section contains some sort of debugging information.  The exact

   format is unspecified.  It's probably ECOFF symbols.  */

#define SHT_MIPS_DEBUG          0x70000005

/* Section contains register usage information.  */

#define SHT_MIPS_REGINFO        0x70000006

/* Section contains miscellaneous options (used on Irix).  */

#define SHT_MIPS_OPTIONS        0x7000000d

/* DWARF debugging section (used on Irix 6).  */

#define SHT_MIPS_DWARF          0x7000001e

/* Events section.  This appears on Irix 6.  I don't know what it

   means.  */

#define SHT_MIPS_EVENTS         0x70000021

/* A section of type SHT_MIPS_LIBLIST contains an array of the

   following structure.  The sh_link field is the section index of the

   string table.  The sh_info field is the number of entries in the

   section.  */

typedef struct

{

  /* String table index for name of shared object.  */

  unsigned long l_name;

  /* Time stamp.  */

  unsigned long l_time_stamp;

  /* Checksum of symbol names and common sizes.  */

  unsigned long l_checksum;

  /* String table index for version.  */

  unsigned long l_version;

  /* Flags.  */

  unsigned long l_flags;

} Elf32_Lib;

/* The l_flags field of an Elf32_Lib structure may contain the

   following flags.  */

/* Require an exact match at runtime.  */

#define LL_EXACT_MATCH          0x00000001

/* Ignore version incompatibilities at runtime.  */

#define LL_IGNORE_INT_VER       0x00000002

/* A section of type SHT_MIPS_CONFLICT is an array of indices into the

   .dynsym section.  Each element has the following type.  */

typedef unsigned long Elf32_Conflict;

/* A section of type SHT_MIPS_GPTAB contains information about how

   much GP space would be required for different -G arguments.  This

   information is only used so that the linker can provide informative

   suggestions as to the best -G value to use.  The sh_info field is

   the index of the section for which this information applies.  The

   contents of the section are an array of the following union.  The

   first element uses the gt_header field.  The remaining elements use

   the gt_entry field.  */

typedef union

{

  struct

    {

      /* -G value actually used for this object file.  */

      unsigned long gt_current_g_value;

      /* Unused.  */

      unsigned long gt_unused;

    } gt_header;

  struct

    {

      /* If this -G argument has been used...  */

      unsigned long gt_g_value;

      /* ...this many GP section bytes would be required.  */

      unsigned long gt_bytes;

    } gt_entry;

} Elf32_gptab;

/* The external version of Elf32_gptab.  */

typedef union

{

  struct

    {

      unsigned char gt_current_g_value[4];

      unsigned char gt_unused[4];

    } gt_header;

  struct

    {

      unsigned char gt_g_value[4];

      unsigned char gt_bytes[4];

    } gt_entry;

} Elf32_External_gptab;

/* A section of type SHT_MIPS_REGINFO contains the following

   structure.  */

typedef struct

{

  /* Mask of general purpose registers used.  */

  unsigned long ri_gprmask;

  /* Mask of co-processor registers used.  */

  unsigned long ri_cprmask[4];

  /* GP register value for this object file.  */

  long ri_gp_value;

} Elf32_RegInfo;

/* The external version of the Elf_RegInfo structure.  */

typedef struct

{

  unsigned char ri_gprmask[4];

  unsigned char ri_cprmask[4][4];

  unsigned char ri_gp_value[4];

} Elf32_External_RegInfo;

/* MIPS ELF .reginfo swapping routines.  */

extern void bfd_mips_elf32_swap_reginfo_in

  PARAMS ((bfd *, const Elf32_External_RegInfo *, Elf32_RegInfo *));

extern void bfd_mips_elf32_swap_reginfo_out

  PARAMS ((bfd *, const Elf32_RegInfo *, Elf32_External_RegInfo *));

/* Processor specific section flags.  */

/* This section must be in the global data area.  */

#define SHF_MIPS_GPREL          0x10000000

/* Processor specific program header types.  */

/* Register usage information.  Identifies one .reginfo section.  */

#define PT_MIPS_REGINFO         0x70000000

/* Processor specific dynamic array tags.  */

/* 32 bit version number for runtime linker interface.  */

#define DT_MIPS_RLD_VERSION     0x70000001

/* Time stamp.  */

#define DT_MIPS_TIME_STAMP      0x70000002

/* Checksum of external strings and common sizes.  */

#define DT_MIPS_ICHECKSUM       0x70000003

/* Index of version string in string table.  */

#define DT_MIPS_IVERSION        0x70000004

/* 32 bits of flags.  */

#define DT_MIPS_FLAGS           0x70000005

/* Base address of the segment.  */

#define DT_MIPS_BASE_ADDRESS    0x70000006

/* Address of .conflict section.  */

#define DT_MIPS_CONFLICT        0x70000008

/* Address of .liblist section.  */

#define DT_MIPS_LIBLIST         0x70000009

/* Number of local global offset table entries.  */

#define DT_MIPS_LOCAL_GOTNO     0x7000000a

/* Number of entries in the .conflict section.  */

#define DT_MIPS_CONFLICTNO      0x7000000b

/* Number of entries in the .liblist section.  */

#define DT_MIPS_LIBLISTNO       0x70000010

/* Number of entries in the .dynsym section.  */

#define DT_MIPS_SYMTABNO        0x70000011

/* Index of first external dynamic symbol not referenced locally.  */

#define DT_MIPS_UNREFEXTNO      0x70000012

/* Index of first dynamic symbol in global offset table.  */

#define DT_MIPS_GOTSYM          0x70000013

/* Number of page table entries in global offset table.  */

#define DT_MIPS_HIPAGENO        0x70000014

/* Address of run time loader map, used for debugging.  */

#define DT_MIPS_RLD_MAP         0x70000016