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elf.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Much of this is taken from binutils and GNU libc ...
 */
#ifndef _ASM_ELF_H
#define _ASM_ELF_H


/* ELF header e_flags defines. */
/* MIPS architecture level. */
#define EF_MIPS_ARCH_1        0x00000000  /* -mips1 code.  */
#define EF_MIPS_ARCH_2        0x10000000  /* -mips2 code.  */
#define EF_MIPS_ARCH_3        0x20000000  /* -mips3 code.  */
#define EF_MIPS_ARCH_4        0x30000000  /* -mips4 code.  */
#define EF_MIPS_ARCH_5        0x40000000  /* -mips5 code.  */
#define EF_MIPS_ARCH_32       0x50000000  /* MIPS32 code.  */
#define EF_MIPS_ARCH_64       0x60000000  /* MIPS64 code.  */
#define EF_MIPS_ARCH_32R2     0x70000000  /* MIPS32 R2 code.  */
#define EF_MIPS_ARCH_64R2     0x80000000  /* MIPS64 R2 code.  */

/* The ABI of a file. */
#define EF_MIPS_ABI_O32       0x00001000  /* O32 ABI.  */
#define EF_MIPS_ABI_O64       0x00002000  /* O32 extended for 64 bit.  */

#define PT_MIPS_REGINFO       0x70000000
#define PT_MIPS_RTPROC        0x70000001
#define PT_MIPS_OPTIONS       0x70000002

/* Flags in the e_flags field of the header */
#define EF_MIPS_NOREORDER     0x00000001
#define EF_MIPS_PIC           0x00000002
#define EF_MIPS_CPIC          0x00000004
#define EF_MIPS_ABI2          0x00000020
#define EF_MIPS_OPTIONS_FIRST 0x00000080
#define EF_MIPS_32BITMODE     0x00000100
#define EF_MIPS_ABI           0x0000f000
#define EF_MIPS_ARCH          0xf0000000

#define DT_MIPS_RLD_VERSION   0x70000001
#define DT_MIPS_TIME_STAMP    0x70000002
#define DT_MIPS_ICHECKSUM     0x70000003
#define DT_MIPS_IVERSION      0x70000004
#define DT_MIPS_FLAGS         0x70000005
      #define RHF_NONE  0x00000000
      #define RHF_HARDWAY     0x00000001
      #define RHF_NOTPOT      0x00000002
      #define RHF_SGI_ONLY    0x00000010
#define DT_MIPS_BASE_ADDRESS  0x70000006
#define DT_MIPS_CONFLICT      0x70000008
#define DT_MIPS_LIBLIST       0x70000009
#define DT_MIPS_LOCAL_GOTNO   0x7000000a
#define DT_MIPS_CONFLICTNO    0x7000000b
#define DT_MIPS_LIBLISTNO     0x70000010
#define DT_MIPS_SYMTABNO      0x70000011
#define DT_MIPS_UNREFEXTNO    0x70000012
#define DT_MIPS_GOTSYM        0x70000013
#define DT_MIPS_HIPAGENO      0x70000014
#define DT_MIPS_RLD_MAP       0x70000016

#define R_MIPS_NONE           0
#define R_MIPS_16       1
#define R_MIPS_32       2
#define R_MIPS_REL32          3
#define R_MIPS_26       4
#define R_MIPS_HI16           5
#define R_MIPS_LO16           6
#define R_MIPS_GPREL16        7
#define R_MIPS_LITERAL        8
#define R_MIPS_GOT16          9
#define R_MIPS_PC16           10
#define R_MIPS_CALL16         11
#define R_MIPS_GPREL32        12
/* The remaining relocs are defined on Irix, although they are not
   in the MIPS ELF ABI.  */
#define R_MIPS_UNUSED1        13
#define R_MIPS_UNUSED2        14
#define R_MIPS_UNUSED3        15
#define R_MIPS_SHIFT5         16
#define R_MIPS_SHIFT6         17
#define R_MIPS_64       18
#define R_MIPS_GOT_DISP       19
#define R_MIPS_GOT_PAGE       20
#define R_MIPS_GOT_OFST       21
/*
 * The following two relocation types are specified in the MIPS ABI
 * conformance guide version 1.2 but not yet in the psABI.
 */
#define R_MIPS_GOTHI16        22
#define R_MIPS_GOTLO16        23
#define R_MIPS_SUB            24
#define R_MIPS_INSERT_A       25
#define R_MIPS_INSERT_B       26
#define R_MIPS_DELETE         27
#define R_MIPS_HIGHER         28
#define R_MIPS_HIGHEST        29
/*
 * The following two relocation types are specified in the MIPS ABI
 * conformance guide version 1.2 but not yet in the psABI.
 */
#define R_MIPS_CALLHI16       30
#define R_MIPS_CALLLO16       31
/*
 * This range is reserved for vendor specific relocations.
 */
#define R_MIPS_LOVENDOR       100
#define R_MIPS_HIVENDOR       127

#define SHN_MIPS_ACCOMON      0xff00            /* Allocated common symbols */
#define SHN_MIPS_TEXT         0xff01            /* Allocated test symbols.  */
#define SHN_MIPS_DATA         0xff02            /* Allocated data symbols.  */
#define SHN_MIPS_SCOMMON      0xff03            /* Small common symbols */
#define SHN_MIPS_SUNDEFINED   0xff04            /* Small undefined symbols */

#define SHT_MIPS_LIST         0x70000000
#define SHT_MIPS_CONFLICT     0x70000002
#define SHT_MIPS_GPTAB        0x70000003
#define SHT_MIPS_UCODE        0x70000004
#define SHT_MIPS_DEBUG        0x70000005
#define SHT_MIPS_REGINFO      0x70000006
#define SHT_MIPS_PACKAGE      0x70000007
#define SHT_MIPS_PACKSYM      0x70000008
#define SHT_MIPS_RELD         0x70000009
#define SHT_MIPS_IFACE        0x7000000b
#define SHT_MIPS_CONTENT      0x7000000c
#define SHT_MIPS_OPTIONS      0x7000000d
#define SHT_MIPS_SHDR         0x70000010
#define SHT_MIPS_FDESC        0x70000011
#define SHT_MIPS_EXTSYM       0x70000012
#define SHT_MIPS_DENSE        0x70000013
#define SHT_MIPS_PDESC        0x70000014
#define SHT_MIPS_LOCSYM       0x70000015
#define SHT_MIPS_AUXSYM       0x70000016
#define SHT_MIPS_OPTSYM       0x70000017
#define SHT_MIPS_LOCSTR       0x70000018
#define SHT_MIPS_LINE         0x70000019
#define SHT_MIPS_RFDESC       0x7000001a
#define SHT_MIPS_DELTASYM     0x7000001b
#define SHT_MIPS_DELTAINST    0x7000001c
#define SHT_MIPS_DELTACLASS   0x7000001d
#define SHT_MIPS_DWARF        0x7000001e
#define SHT_MIPS_DELTADECL    0x7000001f
#define SHT_MIPS_SYMBOL_LIB   0x70000020
#define SHT_MIPS_EVENTS       0x70000021
#define SHT_MIPS_TRANSLATE    0x70000022
#define SHT_MIPS_PIXIE        0x70000023
#define SHT_MIPS_XLATE        0x70000024
#define SHT_MIPS_XLATE_DEBUG  0x70000025
#define SHT_MIPS_WHIRL        0x70000026
#define SHT_MIPS_EH_REGION    0x70000027
#define SHT_MIPS_XLATE_OLD    0x70000028
#define SHT_MIPS_PDR_EXCEPTION      0x70000029

#define SHF_MIPS_GPREL        0x10000000
#define SHF_MIPS_MERGE        0x20000000
#define SHF_MIPS_ADDR         0x40000000
#define SHF_MIPS_STRING       0x80000000
#define SHF_MIPS_NOSTRIP      0x08000000
#define SHF_MIPS_LOCAL        0x04000000
#define SHF_MIPS_NAMES        0x02000000
#define SHF_MIPS_NODUPES      0x01000000

#ifndef ELF_ARCH
/* ELF register definitions */
#define ELF_NGREG 45
#define ELF_NFPREG      33

typedef unsigned long elf_greg_t;
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

typedef double elf_fpreg_t;
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

#ifdef CONFIG_32BIT

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(hdr)                                 \
({                                                    \
      int __res = 1;                                        \
      struct elfhdr *__h = (hdr);                           \
                                                      \
      if (__h->e_machine != EM_MIPS)                              \
            __res = 0;                                \
      if (__h->e_ident[EI_CLASS] != ELFCLASS32)             \
            __res = 0;                                \
      if ((__h->e_flags & EF_MIPS_ABI2) != 0)                     \
            __res = 0;                                \
      if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                  \
          ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))            \
            __res = 0;                                \
                                                      \
      __res;                                                \
})

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS ELFCLASS32

#endif /* CONFIG_32BIT */

#ifdef CONFIG_64BIT
/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(hdr)                                 \
({                                                    \
      int __res = 1;                                        \
      struct elfhdr *__h = (hdr);                           \
                                                      \
      if (__h->e_machine != EM_MIPS)                              \
            __res = 0;                                \
      if (__h->e_ident[EI_CLASS] != ELFCLASS64)                   \
            __res = 0;                                \
                                                      \
      __res;                                                \
})

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS ELFCLASS64

#endif /* CONFIG_64BIT */

/*
 * These are used to set parameters in the core dumps.
 */
#ifdef __MIPSEB__
#define ELF_DATA  ELFDATA2MSB
#elif __MIPSEL__
#define ELF_DATA  ELFDATA2LSB
#endif
#define ELF_ARCH  EM_MIPS

#endif /* !defined(ELF_ARCH) */

struct mips_abi;

extern struct mips_abi mips_abi;
extern struct mips_abi mips_abi_32;
extern struct mips_abi mips_abi_n32;

#ifdef CONFIG_32BIT

#define SET_PERSONALITY(ex)                                 \
do {                                                  \
      set_personality(PER_LINUX);                           \
                                                      \
      current->thread.abi = &mips_abi;                      \
} while (0)

#endif /* CONFIG_32BIT */

#ifdef CONFIG_64BIT

#ifdef CONFIG_MIPS32_N32
#define __SET_PERSONALITY32_N32()                           \
      do {                                            \
            set_thread_flag(TIF_32BIT_ADDR);                \
            current->thread.abi = &mips_abi_n32;                  \
      } while (0)
#else
#define __SET_PERSONALITY32_N32()                           \
      do { } while (0)
#endif

#ifdef CONFIG_MIPS32_O32
#define __SET_PERSONALITY32_O32()                           \
      do {                                            \
            set_thread_flag(TIF_32BIT_REGS);                \
            set_thread_flag(TIF_32BIT_ADDR);                \
            current->thread.abi = &mips_abi_32;             \
      } while (0)
#else
#define __SET_PERSONALITY32_O32()                           \
      do { } while (0)
#endif

#ifdef CONFIG_MIPS32_COMPAT
#define __SET_PERSONALITY32(ex)                                   \
do {                                                  \
      if ((((ex).e_flags & EF_MIPS_ABI2) != 0) &&                 \
           ((ex).e_flags & EF_MIPS_ABI) == 0)                     \
            __SET_PERSONALITY32_N32();                      \
      else                                            \
            __SET_PERSONALITY32_O32();                      \
} while (0)
#else
#define __SET_PERSONALITY32(ex)     do { } while (0)
#endif

#define SET_PERSONALITY(ex)                                 \
do {                                                  \
      clear_thread_flag(TIF_32BIT_REGS);                    \
      clear_thread_flag(TIF_32BIT_ADDR);                    \
                                                      \
      if ((ex).e_ident[EI_CLASS] == ELFCLASS32)             \
            __SET_PERSONALITY32(ex);                        \
      else                                            \
            current->thread.abi = &mips_abi;                \
                                                      \
      if (current->personality != PER_LINUX32)              \
            set_personality(PER_LINUX);                     \
} while (0)

#endif /* CONFIG_64BIT */

struct task_struct;

extern void elf_dump_regs(elf_greg_t *, struct pt_regs *regs);
extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);

#define ELF_CORE_COPY_REGS(elf_regs, regs)                  \
      elf_dump_regs((elf_greg_t *)&(elf_regs), regs);
#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs)               \
      dump_task_fpu(tsk, elf_fpregs)

#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE     PAGE_SIZE

/* This yields a mask that user programs can use to figure out what
   instruction set this cpu supports.  This could be done in userspace,
   but it's not easy, and we've already done it here.  */

#define ELF_HWCAP       (0)

/* This yields a string that ld.so will use to load implementation
   specific libraries for optimization.  This is more specific in
   intent than poking at uname or /proc/cpuinfo.

   For the moment, we have only optimizations for the Intel generations,
   but that could change... */

#define ELF_PLATFORM  (NULL)

/*
 * See comments in asm-alpha/elf.h, this is the same thing
 * on the MIPS.
 */
#define ELF_PLAT_INIT(_r, load_addr)      do { \
      _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;  \
      _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;  \
      _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0;     \
      _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;    \
      _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;    \
      _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;    \
      _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;    \
      _r->regs[30] = _r->regs[31] = 0;                      \
} while (0)

/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
   use of this is to invoke "./ld.so someprog" to test out a new version of
   the loader.  We need to make sure that it is out of the way of the program
   that it will "exec", and that there is sufficient room for the brk.  */

#ifndef ELF_ET_DYN_BASE
#define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
#endif

#endif /* _ASM_ELF_H */

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