arch/csky/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #ifndef __ASM_CSKY_ELF_H
   5 #define __ASM_CSKY_ELF_H
   6
   7 #include <asm/ptrace.h>
   8 #include <abi/regdef.h>
   9
  10 #define ELF_ARCH EM_CSKY
  11 #define EM_CSKY_OLD 39
  12
  13 /* CSKY Relocations */
  14 #define R_CSKY_NONE               0
  15 #define R_CSKY_32                 1
  16 #define R_CSKY_PCIMM8BY4          2
  17 #define R_CSKY_PCIMM11BY2         3
  18 #define R_CSKY_PCIMM4BY2          4
  19 #define R_CSKY_PC32               5
  20 #define R_CSKY_PCRELJSR_IMM11BY2  6
  21 #define R_CSKY_GNU_VTINHERIT      7
  22 #define R_CSKY_GNU_VTENTRY        8
  23 #define R_CSKY_RELATIVE           9
  24 #define R_CSKY_COPY               10
  25 #define R_CSKY_GLOB_DAT           11
  26 #define R_CSKY_JUMP_SLOT          12
  27 #define R_CSKY_ADDR_HI16          24
  28 #define R_CSKY_ADDR_LO16          25
  29 #define R_CSKY_PCRELJSR_IMM26BY2  40
  30
  31 typedef unsigned long elf_greg_t;
  32
  33 typedef struct user_fp elf_fpregset_t;
  34
  35 /*
  36  * In gdb/bfd elf32-csky.c, csky_elf_grok_prstatus() use fixed size of
  37  * elf_prstatus. It's 148 for abiv1 and 220 for abiv2, the size is enough
  38  * for coredump and no need full sizeof(struct pt_regs).
  39  */
  40 #define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 2)
  41
  42 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  43
  44 /*
  45  * This is used to ensure we don't load something for the wrong architecture.
  46  */
  47 #define elf_check_arch(x) (((x)->e_machine == ELF_ARCH) || \
  48                            ((x)->e_machine == EM_CSKY_OLD))
  49
  50 /*
  51  * These are used to set parameters in the core dumps.
  52  */
  53 #define ELF_EXEC_PAGESIZE               4096
  54 #define ELF_CLASS                       ELFCLASS32
  55 #define ELF_PLAT_INIT(_r, load_addr)    { _r->a0 = 0; }
  56
  57 #ifdef __cskyBE__
  58 #define ELF_DATA        ELFDATA2MSB
  59 #else
  60 #define ELF_DATA        ELFDATA2LSB
  61 #endif
  62
  63 /*
  64  * This is the location that an ET_DYN program is loaded if exec'ed. Typical
  65  * use of this is to invoke "./ld.so someprog" to test out a new version of
  66  * the loader.  We need to make sure that it is out of the way of the program
  67  * that it will "exec", and that there is sufficient room for the brk.
  68  */
  69 #define ELF_ET_DYN_BASE 0x0UL
  70 #include <abi/elf.h>
  71
  72 /* Similar, but for a thread other than current. */
  73 struct task_struct;
  74 extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
  75 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
  76
  77 #define ELF_HWCAP       (0)
  78
  79 /*
  80  * This yields a string that ld.so will use to load implementation specific
  81  * libraries for optimization. This is more specific in intent than poking
  82  * at uname or /proc/cpuinfo.
  83  */
  84 #define ELF_PLATFORM            (NULL)
  85 #define SET_PERSONALITY(ex)     set_personality(PER_LINUX)
  86
  87 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
  88 struct linux_binprm;
  89 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
  90                                        int uses_interp);
  91 #endif /* __ASM_CSKY_ELF_H */