LXR linux/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
  31typedef unsigned long elf_greg_t;
  32
  33typedef 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
  42typedef 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 USE_ELF_CORE_DUMP
  54#define ELF_EXEC_PAGESIZE               4096
  55#define ELF_CLASS                       ELFCLASS32
  56#define ELF_PLAT_INIT(_r, load_addr)    { _r->a0 = 0; }
  57
  58#ifdef __cskyBE__
  59#define ELF_DATA        ELFDATA2MSB
  60#else
  61#define ELF_DATA        ELFDATA2LSB
  62#endif
  63
  64/*
  65 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
  66 * use of this is to invoke "./ld.so someprog" to test out a new version of
  67 * the loader.  We need to make sure that it is out of the way of the program
  68 * that it will "exec", and that there is sufficient room for the brk.
  69 */
  70#define ELF_ET_DYN_BASE 0x0UL
  71#include <abi/elf.h>
  72
  73/* Similar, but for a thread other than current. */
  74struct task_struct;
  75extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
  76#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
  77
  78#define ELF_HWCAP       (0)
  79
  80/*
  81 * This yields a string that ld.so will use to load implementation specific
  82 * libraries for optimization. This is more specific in intent than poking
  83 * at uname or /proc/cpuinfo.
  84 */
  85#define ELF_PLATFORM            (NULL)
  86#define SET_PERSONALITY(ex)     set_personality(PER_LINUX)
  87
  88#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
  89struct linux_binprm;
  90extern int arch_setup_additional_pages(struct linux_binprm *bprm,
  91                                       int uses_interp);
  92#endif /* __ASM_CSKY_ELF_H */
  93