arch/riscv/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
   4  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
   5  * Copyright (C) 2012 Regents of the University of California
   6  */
   7
   8 #ifndef _ASM_RISCV_ELF_H
   9 #define _ASM_RISCV_ELF_H
  10
  11 #include <uapi/asm/elf.h>
  12 #include <asm/auxvec.h>
  13 #include <asm/byteorder.h>
  14
  15 /*
  16  * These are used to set parameters in the core dumps.
  17  */
  18 #define ELF_ARCH        EM_RISCV
  19
  20 #ifdef CONFIG_64BIT
  21 #define ELF_CLASS       ELFCLASS64
  22 #else
  23 #define ELF_CLASS       ELFCLASS32
  24 #endif
  25
  26 #define ELF_DATA        ELFDATA2LSB
  27
  28 /*
  29  * This is used to ensure we don't load something for the wrong architecture.
  30  */
  31 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
  32
  33 #define CORE_DUMP_USE_REGSET
  34 #define ELF_EXEC_PAGESIZE       (PAGE_SIZE)
  35
  36 /*
  37  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  38  * use of this is to invoke "./ld.so someprog" to test out a new version of
  39  * the loader.  We need to make sure that it is out of the way of the program
  40  * that it will "exec", and that there is sufficient room for the brk.
  41  */
  42 #define ELF_ET_DYN_BASE         ((TASK_SIZE / 3) * 2)
  43
  44 /*
  45  * This yields a mask that user programs can use to figure out what
  46  * instruction set this CPU supports.  This could be done in user space,
  47  * but it's not easy, and we've already done it here.
  48  */
  49 #define ELF_HWCAP       (elf_hwcap)
  50 extern unsigned long elf_hwcap;
  51
  52 /*
  53  * This yields a string that ld.so will use to load implementation
  54  * specific libraries for optimization.  This is more specific in
  55  * intent than poking at uname or /proc/cpuinfo.
  56  */
  57 #define ELF_PLATFORM    (NULL)
  58
  59 #define ARCH_DLINFO                                             \
  60 do {                                                            \
  61         NEW_AUX_ENT(AT_SYSINFO_EHDR,                            \
  62                 (elf_addr_t)current->mm->context.vdso);         \
  63 } while (0)
  64
  65
  66 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
  67 struct linux_binprm;
  68 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
  69         int uses_interp);
  70
  71 #endif /* _ASM_RISCV_ELF_H */