arch/hexagon/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * ELF definitions for the Hexagon architecture
   4  *
   5  * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
   6  */
   7
   8 #ifndef __ASM_ELF_H
   9 #define __ASM_ELF_H
  10
  11 #include <asm/ptrace.h>
  12 #include <asm/user.h>
  13 #include <linux/elf-em.h>
  14
  15 struct elf32_hdr;
  16
  17 /*
  18  * ELF header e_flags defines.
  19  */
  20
  21 /*  should have stuff like "CPU type" and maybe "ABI version", etc  */
  22
  23 /* Hexagon relocations */
  24   /* V2 */
  25 #define R_HEXAGON_NONE           0
  26 #define R_HEXAGON_B22_PCREL      1
  27 #define R_HEXAGON_B15_PCREL      2
  28 #define R_HEXAGON_B7_PCREL       3
  29 #define R_HEXAGON_LO16           4
  30 #define R_HEXAGON_HI16           5
  31 #define R_HEXAGON_32             6
  32 #define R_HEXAGON_16             7
  33 #define R_HEXAGON_8              8
  34 #define R_HEXAGON_GPREL16_0      9
  35 #define R_HEXAGON_GPREL16_1     10
  36 #define R_HEXAGON_GPREL16_2     11
  37 #define R_HEXAGON_GPREL16_3     12
  38 #define R_HEXAGON_HL16          13
  39   /* V3 */
  40 #define R_HEXAGON_B13_PCREL     14
  41   /* V4 */
  42 #define R_HEXAGON_B9_PCREL      15
  43   /* V4 (extenders) */
  44 #define R_HEXAGON_B32_PCREL_X   16
  45 #define R_HEXAGON_32_6_X        17
  46   /* V4 (extended) */
  47 #define R_HEXAGON_B22_PCREL_X   18
  48 #define R_HEXAGON_B15_PCREL_X   19
  49 #define R_HEXAGON_B13_PCREL_X   20
  50 #define R_HEXAGON_B9_PCREL_X    21
  51 #define R_HEXAGON_B7_PCREL_X    22
  52 #define R_HEXAGON_16_X          23
  53 #define R_HEXAGON_12_X          24
  54 #define R_HEXAGON_11_X          25
  55 #define R_HEXAGON_10_X          26
  56 #define R_HEXAGON_9_X           27
  57 #define R_HEXAGON_8_X           28
  58 #define R_HEXAGON_7_X           29
  59 #define R_HEXAGON_6_X           30
  60   /* V2 PIC */
  61 #define R_HEXAGON_32_PCREL      31
  62 #define R_HEXAGON_COPY          32
  63 #define R_HEXAGON_GLOB_DAT      33
  64 #define R_HEXAGON_JMP_SLOT      34
  65 #define R_HEXAGON_RELATIVE      35
  66 #define R_HEXAGON_PLT_B22_PCREL 36
  67 #define R_HEXAGON_GOTOFF_LO16   37
  68 #define R_HEXAGON_GOTOFF_HI16   38
  69 #define R_HEXAGON_GOTOFF_32     39
  70 #define R_HEXAGON_GOT_LO16      40
  71 #define R_HEXAGON_GOT_HI16      41
  72 #define R_HEXAGON_GOT_32        42
  73 #define R_HEXAGON_GOT_16        43
  74
  75 /*
  76  * ELF register definitions..
  77  */
  78 typedef unsigned long elf_greg_t;
  79
  80 typedef struct user_regs_struct elf_gregset_t;
  81 #define ELF_NGREG (sizeof(elf_gregset_t)/sizeof(unsigned long))
  82
  83 /*  Placeholder  */
  84 typedef unsigned long elf_fpregset_t;
  85
  86 /*
  87  * Bypass the whole "regsets" thing for now and use the define.
  88  */
  89
  90 #if CONFIG_HEXAGON_ARCH_VERSION >= 4
  91 #define CS_COPYREGS(DEST,REGS) \
  92 do {\
  93         DEST.cs0 = REGS->cs0;\
  94         DEST.cs1 = REGS->cs1;\
  95 } while (0)
  96 #else
  97 #define CS_COPYREGS(DEST,REGS)
  98 #endif
  99
 100 #define ELF_CORE_COPY_REGS(DEST, REGS)  \
 101 do {                                    \
 102         DEST.r0 = REGS->r00;            \
 103         DEST.r1 = REGS->r01;            \
 104         DEST.r2 = REGS->r02;            \
 105         DEST.r3 = REGS->r03;            \
 106         DEST.r4 = REGS->r04;            \
 107         DEST.r5 = REGS->r05;            \
 108         DEST.r6 = REGS->r06;            \
 109         DEST.r7 = REGS->r07;            \
 110         DEST.r8 = REGS->r08;            \
 111         DEST.r9 = REGS->r09;            \
 112         DEST.r10 = REGS->r10;           \
 113         DEST.r11 = REGS->r11;           \
 114         DEST.r12 = REGS->r12;           \
 115         DEST.r13 = REGS->r13;           \
 116         DEST.r14 = REGS->r14;           \
 117         DEST.r15 = REGS->r15;           \
 118         DEST.r16 = REGS->r16;           \
 119         DEST.r17 = REGS->r17;           \
 120         DEST.r18 = REGS->r18;           \
 121         DEST.r19 = REGS->r19;           \
 122         DEST.r20 = REGS->r20;           \
 123         DEST.r21 = REGS->r21;           \
 124         DEST.r22 = REGS->r22;           \
 125         DEST.r23 = REGS->r23;           \
 126         DEST.r24 = REGS->r24;           \
 127         DEST.r25 = REGS->r25;           \
 128         DEST.r26 = REGS->r26;           \
 129         DEST.r27 = REGS->r27;           \
 130         DEST.r28 = REGS->r28;           \
 131         DEST.r29 = pt_psp(REGS);        \
 132         DEST.r30 = REGS->r30;           \
 133         DEST.r31 = REGS->r31;           \
 134         DEST.sa0 = REGS->sa0;           \
 135         DEST.lc0 = REGS->lc0;           \
 136         DEST.sa1 = REGS->sa1;           \
 137         DEST.lc1 = REGS->lc1;           \
 138         DEST.m0 = REGS->m0;             \
 139         DEST.m1 = REGS->m1;             \
 140         DEST.usr = REGS->usr;           \
 141         DEST.p3_0 = REGS->preds;        \
 142         DEST.gp = REGS->gp;             \
 143         DEST.ugp = REGS->ugp;           \
 144         CS_COPYREGS(DEST,REGS);         \
 145         DEST.pc = pt_elr(REGS);         \
 146         DEST.cause = pt_cause(REGS);    \
 147         DEST.badva = pt_badva(REGS);    \
 148 } while (0);
 149
 150 /*
 151  * This is used to ensure we don't load something for the wrong architecture.
 152  * Checks the machine and ABI type.
 153  */
 154 #define elf_check_arch(hdr)     ((hdr)->e_machine == EM_HEXAGON)
 155
 156 /*
 157  * These are used to set parameters in the core dumps.
 158  */
 159 #define ELF_CLASS       ELFCLASS32
 160 #define ELF_DATA        ELFDATA2LSB
 161 #define ELF_ARCH        EM_HEXAGON
 162
 163 #if CONFIG_HEXAGON_ARCH_VERSION == 2
 164 #define ELF_CORE_EFLAGS 0x1
 165 #endif
 166
 167 #if CONFIG_HEXAGON_ARCH_VERSION == 3
 168 #define ELF_CORE_EFLAGS 0x2
 169 #endif
 170
 171 #if CONFIG_HEXAGON_ARCH_VERSION == 4
 172 #define ELF_CORE_EFLAGS 0x3
 173 #endif
 174
 175 /*
 176  * Some architectures have ld.so set up a pointer to a function
 177  * to be registered using atexit, to facilitate cleanup.  So that
 178  * static executables will be well-behaved, we would null the register
 179  * in question here, in the pt_regs structure passed.  For now,
 180  * leave it a null macro.
 181  */
 182 #define ELF_PLAT_INIT(regs, load_addr) do { } while (0)
 183
 184 #define CORE_DUMP_USE_REGSET
 185
 186 /* Hrm is this going to cause problems for changing PAGE_SIZE?  */
 187 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 188
 189 /*
 190  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 191  * use of this is to invoke "./ld.so someprog" to test out a new version of
 192  * the loader.  We need to make sure that it is out of the way of the program
 193  * that it will "exec", and that there is sufficient room for the brk.
 194  */
 195 #define ELF_ET_DYN_BASE         0x08000000UL
 196
 197 /*
 198  * This yields a mask that user programs can use to figure out what
 199  * instruction set this cpu supports.
 200  */
 201 #define ELF_HWCAP       (0)
 202
 203 /*
 204  * This yields a string that ld.so will use to load implementation
 205  * specific libraries for optimization.  This is more specific in
 206  * intent than poking at uname or /proc/cpuinfo.
 207  */
 208 #define ELF_PLATFORM  (NULL)
 209
 210 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 211 struct linux_binprm;
 212 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 213                                        int uses_interp);
 214
 215
 216 #endif