target/linux/ubicom32/files/arch/ubicom32/include/asm/elf.h

   1 /*
   2  * arch/ubicom32/include/asm/elf.h
   3  *   Definitions for elf executable format for Ubicom32 architecture.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #ifndef _ASM_UBICOM32_ELF_H
  29 #define _ASM_UBICOM32_ELF_H
  30
  31 /*
  32  * ELF register definitions..
  33  */
  34
  35 #include <asm/ptrace.h>
  36 #include <asm/user.h>
  37
  38 /*
  39  * Processor specific flags for the ELF header e_flags field.
  40  */
  41 #define EF_UBICOM32_V3          0x00000001      /* -fmarch=ubicom32v3 */
  42 #define EF_UBICOM32_V4          0x00000002      /* -fmarch=ubicom32v4 */
  43 #define EF_UBICOM32_PIC         0x80000000      /* -fpic */
  44 #define EF_UBICOM32_FDPIC       0x40000000      /* -mfdpic */
  45
  46 /*
  47  * Ubicom32 ELF relocation types
  48  */
  49 #define R_UBICOM32_NONE                 0
  50 #define R_UBICOM32_16                   1
  51 #define R_UBICOM32_32                   2
  52 #define R_UBICOM32_LO16                 3
  53 #define R_UBICOM32_HI16                 4
  54 #define R_UBICOM32_21_PCREL             5
  55 #define R_UBICOM32_24_PCREL             6
  56 #define R_UBICOM32_HI24                 7
  57 #define R_UBICOM32_LO7_S                8
  58 #define R_UBICOM32_LO7_2_S              9
  59 #define R_UBICOM32_LO7_4_S              10
  60 #define R_UBICOM32_LO7_D                11
  61 #define R_UBICOM32_LO7_2_D              12
  62 #define R_UBICOM32_LO7_4_D              13
  63 #define R_UBICOM32_32_HARVARD           14
  64 #define R_UBICOM32_LO7_CALLI            15
  65 #define R_UBICOM32_LO16_CALLI           16
  66 #define R_UBICOM32_GOT_HI24             17
  67 #define R_UBICOM32_GOT_LO7_S            18
  68 #define R_UBICOM32_GOT_LO7_2_S          19
  69 #define R_UBICOM32_GOT_LO7_4_S          20
  70 #define R_UBICOM32_GOT_LO7_D            21
  71 #define R_UBICOM32_GOT_LO7_2_D          22
  72 #define R_UBICOM32_GOT_LO7_4_D          23
  73 #define R_UBICOM32_FUNCDESC_GOT_HI24    24
  74 #define R_UBICOM32_FUNCDESC_GOT_LO7_S   25
  75 #define R_UBICOM32_FUNCDESC_GOT_LO7_2_S 26
  76 #define R_UBICOM32_FUNCDESC_GOT_LO7_4_S 27
  77 #define R_UBICOM32_FUNCDESC_GOT_LO7_D   28
  78 #define R_UBICOM32_FUNCDESC_GOT_LO7_2_D 29
  79 #define R_UBICOM32_FUNCDESC_GOT_LO7_4_D 30
  80 #define R_UBICOM32_GOT_LO7_CALLI        31
  81 #define R_UBICOM32_FUNCDESC_GOT_LO7_CALLI 32
  82 #define R_UBICOM32_FUNCDESC_VALUE       33
  83 #define R_UBICOM32_FUNCDESC             34
  84 #define R_UBICOM32_GOTOFFSET_LO         35
  85 #define R_UBICOM32_GOTOFFSET_HI         36
  86 #define R_UBICOM32_FUNCDESC_GOTOFFSET_LO 37
  87 #define R_UBICOM32_FUNCDESC_GOTOFFSET_HI 38
  88 #define R_UBICOM32_GNU_VTINHERIT        200
  89 #define R_UBICOM32_GNU_VTENTRY          201
  90
  91 typedef unsigned long elf_greg_t;
  92
  93 #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
  94 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  95
  96 typedef struct user_ubicom32fp_struct elf_fpregset_t;
  97
  98 /*
  99  * This is used to ensure we don't load something for the wrong architecture.
 100  */
 101 #define elf_check_arch(x) ((x)->e_machine == EM_UBICOM32)
 102
 103 #define elf_check_fdpic(x) ((x)->e_flags & EF_UBICOM32_FDPIC)
 104
 105 #define elf_check_const_displacement(x) ((x)->e_flags & EF_UBICOM32_PIC)
 106
 107 /*
 108  * These are used to set parameters in the core dumps.
 109  */
 110 #define ELF_CLASS       ELFCLASS32
 111 #define ELF_DATA        ELFDATA2MSB
 112 #define ELF_ARCH        EM_UBICOM32
 113
 114 /* For SVR4/m68k the function pointer to be registered with `atexit' is
 115    passed in %a1.  Although my copy of the ABI has no such statement, it
 116    is actually used on ASV.  */
 117 #define ELF_PLAT_INIT(_r, load_addr)    _r->a1 = 0
 118
 119 #define ELF_FDPIC_PLAT_INIT(_regs, _exec_map_addr, _interp_map_addr,    \
 120                             _dynamic_addr)                              \
 121         do {                                                            \
 122                 _regs->dn[1]    = _exec_map_addr;                       \
 123                 _regs->dn[2]    = _interp_map_addr;                     \
 124                 _regs->dn[3]    = _dynamic_addr;                        \
 125                 _regs->an[1]    = 0; /* dl_fini will be set by ldso */  \
 126         } while (0)
 127
 128 #define USE_ELF_CORE_DUMP
 129 #define ELF_EXEC_PAGESIZE       4096
 130
 131 #ifdef __KERNEL__
 132 #ifdef CONFIG_UBICOM32_V4
 133 #define ELF_FDPIC_CORE_EFLAGS   (EF_UBICOM32_FDPIC | EF_UBICOM32_V4)
 134 #elif defined CONFIG_UBICOM32_V3
 135 #define ELF_FDPIC_CORE_EFLAGS   (EF_UBICOM32_FDPIC | EF_UBICOM32_V3)
 136 #else
 137 #error Unknown/Unsupported ubicom32 architecture.
 138 #endif
 139 #endif
 140
 141 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 142    use of this is to invoke "./ld.so someprog" to test out a new version of
 143    the loader.  We need to make sure that it is out of the way of the program
 144    that it will "exec", and that there is sufficient room for the brk.  */
 145
 146 #define ELF_ET_DYN_BASE         0xD0000000UL
 147
 148 /*
 149  * For Ubicom32, the elf_gregset_t and struct pt_regs are the same size
 150  * data structure so a copy is performed instead of providing the
 151  * ELF_CORE_COPY_REGS macro.
 152  */
 153
 154 /*
 155  * ELF_CORE_COPY_TASK_REGS is needed to dump register state from multi threaded user projects.
 156  */
 157 extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
 158 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 159
 160 /* This yields a mask that user programs can use to figure out what
 161    instruction set this cpu supports.  */
 162
 163 #define ELF_HWCAP       (0)
 164
 165 /* This yields a string that ld.so will use to load implementation
 166    specific libraries for optimization.  This is more specific in
 167    intent than poking at uname or /proc/cpuinfo.  */
 168
 169 #define ELF_PLATFORM  (NULL)
 170
 171 #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
 172
 173 #endif /* _ASM_UBICOM32_ELF_H */