arch/hexagon/include/asm/elf.h

   1 /*
   2  * ELF definitions for the Hexagon architecture
   3  *
   4  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 and
   8  * only version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20
  21 #ifndef __ASM_ELF_H
  22 #define __ASM_ELF_H
  23
  24 #include <asm/ptrace.h>
  25 #include <asm/user.h>
  26
  27 /*
  28  * This should really be in linux/elf-em.h.
  29  */
  30 #define EM_HEXAGON      164   /* QUALCOMM Hexagon */
  31
  32 struct elf32_hdr;
  33
  34 /*
  35  * ELF header e_flags defines.
  36  */
  37
  38 /*  should have stuff like "CPU type" and maybe "ABI version", etc  */
  39
  40 /* Hexagon relocations */
  41   /* V2 */
  42 #define R_HEXAGON_NONE           0
  43 #define R_HEXAGON_B22_PCREL      1
  44 #define R_HEXAGON_B15_PCREL      2
  45 #define R_HEXAGON_B7_PCREL       3
  46 #define R_HEXAGON_LO16           4
  47 #define R_HEXAGON_HI16           5
  48 #define R_HEXAGON_32             6
  49 #define R_HEXAGON_16             7
  50 #define R_HEXAGON_8              8
  51 #define R_HEXAGON_GPREL16_0      9
  52 #define R_HEXAGON_GPREL16_1     10
  53 #define R_HEXAGON_GPREL16_2     11
  54 #define R_HEXAGON_GPREL16_3     12
  55 #define R_HEXAGON_HL16          13
  56   /* V3 */
  57 #define R_HEXAGON_B13_PCREL     14
  58   /* V4 */
  59 #define R_HEXAGON_B9_PCREL      15
  60   /* V4 (extenders) */
  61 #define R_HEXAGON_B32_PCREL_X   16
  62 #define R_HEXAGON_32_6_X        17
  63   /* V4 (extended) */
  64 #define R_HEXAGON_B22_PCREL_X   18
  65 #define R_HEXAGON_B15_PCREL_X   19
  66 #define R_HEXAGON_B13_PCREL_X   20
  67 #define R_HEXAGON_B9_PCREL_X    21
  68 #define R_HEXAGON_B7_PCREL_X    22
  69 #define R_HEXAGON_16_X          23
  70 #define R_HEXAGON_12_X          24
  71 #define R_HEXAGON_11_X          25
  72 #define R_HEXAGON_10_X          26
  73 #define R_HEXAGON_9_X           27
  74 #define R_HEXAGON_8_X           28
  75 #define R_HEXAGON_7_X           29
  76 #define R_HEXAGON_6_X           30
  77   /* V2 PIC */
  78 #define R_HEXAGON_32_PCREL      31
  79 #define R_HEXAGON_COPY          32
  80 #define R_HEXAGON_GLOB_DAT      33
  81 #define R_HEXAGON_JMP_SLOT      34
  82 #define R_HEXAGON_RELATIVE      35
  83 #define R_HEXAGON_PLT_B22_PCREL 36
  84 #define R_HEXAGON_GOTOFF_LO16   37
  85 #define R_HEXAGON_GOTOFF_HI16   38
  86 #define R_HEXAGON_GOTOFF_32     39
  87 #define R_HEXAGON_GOT_LO16      40
  88 #define R_HEXAGON_GOT_HI16      41
  89 #define R_HEXAGON_GOT_32        42
  90 #define R_HEXAGON_GOT_16        43
  91
  92 /*
  93  * ELF register definitions..
  94  */
  95 typedef unsigned long elf_greg_t;
  96
  97 typedef struct user_regs_struct elf_gregset_t;
  98 #define ELF_NGREG (sizeof(elf_gregset_t)/sizeof(unsigned long))
  99
 100 /*  Placeholder  */
 101 typedef unsigned long elf_fpregset_t;
 102
 103 /*
 104  * Bypass the whole "regsets" thing for now and use the define.
 105  */
 106
 107 #if CONFIG_HEXAGON_ARCH_VERSION >= 4
 108 #define CS_COPYREGS(DEST,REGS) \
 109 do {\
 110         DEST.cs0 = REGS->cs0;\
 111         DEST.cs1 = REGS->cs1;\
 112 } while (0)
 113 #else
 114 #define CS_COPYREGS(DEST,REGS)
 115 #endif
 116
 117 #define ELF_CORE_COPY_REGS(DEST, REGS)  \
 118 do {                                    \
 119         DEST.r0 = REGS->r00;            \
 120         DEST.r1 = REGS->r01;            \
 121         DEST.r2 = REGS->r02;            \
 122         DEST.r3 = REGS->r03;            \
 123         DEST.r4 = REGS->r04;            \
 124         DEST.r5 = REGS->r05;            \
 125         DEST.r6 = REGS->r06;            \
 126         DEST.r7 = REGS->r07;            \
 127         DEST.r8 = REGS->r08;            \
 128         DEST.r9 = REGS->r09;            \
 129         DEST.r10 = REGS->r10;           \
 130         DEST.r11 = REGS->r11;           \
 131         DEST.r12 = REGS->r12;           \
 132         DEST.r13 = REGS->r13;           \
 133         DEST.r14 = REGS->r14;           \
 134         DEST.r15 = REGS->r15;           \
 135         DEST.r16 = REGS->r16;           \
 136         DEST.r17 = REGS->r17;           \
 137         DEST.r18 = REGS->r18;           \
 138         DEST.r19 = REGS->r19;           \
 139         DEST.r20 = REGS->r20;           \
 140         DEST.r21 = REGS->r21;           \
 141         DEST.r22 = REGS->r22;           \
 142         DEST.r23 = REGS->r23;           \
 143         DEST.r24 = REGS->r24;           \
 144         DEST.r25 = REGS->r25;           \
 145         DEST.r26 = REGS->r26;           \
 146         DEST.r27 = REGS->r27;           \
 147         DEST.r28 = REGS->r28;           \
 148         DEST.r29 = pt_psp(REGS);        \
 149         DEST.r30 = REGS->r30;           \
 150         DEST.r31 = REGS->r31;           \
 151         DEST.sa0 = REGS->sa0;           \
 152         DEST.lc0 = REGS->lc0;           \
 153         DEST.sa1 = REGS->sa1;           \
 154         DEST.lc1 = REGS->lc1;           \
 155         DEST.m0 = REGS->m0;             \
 156         DEST.m1 = REGS->m1;             \
 157         DEST.usr = REGS->usr;           \
 158         DEST.p3_0 = REGS->preds;        \
 159         DEST.gp = REGS->gp;             \
 160         DEST.ugp = REGS->ugp;           \
 161         CS_COPYREGS(DEST,REGS);         \
 162         DEST.pc = pt_elr(REGS);         \
 163         DEST.cause = pt_cause(REGS);    \
 164         DEST.badva = pt_badva(REGS);    \
 165 } while (0);
 166
 167 /*
 168  * This is used to ensure we don't load something for the wrong architecture.
 169  * Checks the machine and ABI type.
 170  */
 171 #define elf_check_arch(hdr)     ((hdr)->e_machine == EM_HEXAGON)
 172
 173 /*
 174  * These are used to set parameters in the core dumps.
 175  */
 176 #define ELF_CLASS       ELFCLASS32
 177 #define ELF_DATA        ELFDATA2LSB
 178 #define ELF_ARCH        EM_HEXAGON
 179
 180 #if CONFIG_HEXAGON_ARCH_VERSION == 2
 181 #define ELF_CORE_EFLAGS 0x1
 182 #endif
 183
 184 #if CONFIG_HEXAGON_ARCH_VERSION == 3
 185 #define ELF_CORE_EFLAGS 0x2
 186 #endif
 187
 188 #if CONFIG_HEXAGON_ARCH_VERSION == 4
 189 #define ELF_CORE_EFLAGS 0x3
 190 #endif
 191
 192 /*
 193  * Some architectures have ld.so set up a pointer to a function
 194  * to be registered using atexit, to facilitate cleanup.  So that
 195  * static executables will be well-behaved, we would null the register
 196  * in question here, in the pt_regs structure passed.  For now,
 197  * leave it a null macro.
 198  */
 199 #define ELF_PLAT_INIT(regs, load_addr) do { } while (0)
 200
 201 #define USE_ELF_CORE_DUMP
 202 #define CORE_DUMP_USE_REGSET
 203
 204 /* Hrm is this going to cause problems for changing PAGE_SIZE?  */
 205 #define ELF_EXEC_PAGESIZE       4096
 206
 207 /*
 208  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 209  * use of this is to invoke "./ld.so someprog" to test out a new version of
 210  * the loader.  We need to make sure that it is out of the way of the program
 211  * that it will "exec", and that there is sufficient room for the brk.
 212  */
 213 #define ELF_ET_DYN_BASE         0x08000000UL
 214
 215 /*
 216  * This yields a mask that user programs can use to figure out what
 217  * instruction set this cpu supports.
 218  */
 219 #define ELF_HWCAP       (0)
 220
 221 /*
 222  * This yields a string that ld.so will use to load implementation
 223  * specific libraries for optimization.  This is more specific in
 224  * intent than poking at uname or /proc/cpuinfo.
 225  */
 226 #define ELF_PLATFORM  (NULL)
 227
 228 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 229 struct linux_binprm;
 230 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 231                                        int uses_interp);
 232
 233
 234 #endif