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 #include <asm/cacheinfo.h>
  15
  16 /*
  17  * These are used to set parameters in the core dumps.
  18  */
  19 #define ELF_ARCH        EM_RISCV
  20
  21 #ifdef CONFIG_64BIT
  22 #define ELF_CLASS       ELFCLASS64
  23 #else
  24 #define ELF_CLASS       ELFCLASS32
  25 #endif
  26
  27 #define ELF_DATA        ELFDATA2LSB
  28
  29 /*
  30  * This is used to ensure we don't load something for the wrong architecture.
  31  */
  32 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
  33
  34 #define CORE_DUMP_USE_REGSET
  35 #define ELF_EXEC_PAGESIZE       (PAGE_SIZE)
  36
  37 /*
  38  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  39  * use of this is to invoke "./ld.so someprog" to test out a new version of
  40  * the loader.  We need to make sure that it is out of the way of the program
  41  * that it will "exec", and that there is sufficient room for the brk.
  42  */
  43 #define ELF_ET_DYN_BASE         ((TASK_SIZE / 3) * 2)
  44
  45 /*
  46  * This yields a mask that user programs can use to figure out what
  47  * instruction set this CPU supports.  This could be done in user space,
  48  * but it's not easy, and we've already done it here.
  49  */
  50 #define ELF_HWCAP       (elf_hwcap)
  51 extern unsigned long elf_hwcap;
  52
  53 /*
  54  * This yields a string that ld.so will use to load implementation
  55  * specific libraries for optimization.  This is more specific in
  56  * intent than poking at uname or /proc/cpuinfo.
  57  */
  58 #define ELF_PLATFORM    (NULL)
  59
  60 #ifdef CONFIG_MMU
  61 #define ARCH_DLINFO                                             \
  62 do {                                                            \
  63         NEW_AUX_ENT(AT_SYSINFO_EHDR,                            \
  64                 (elf_addr_t)current->mm->context.vdso);         \
  65         NEW_AUX_ENT(AT_L1I_CACHESIZE,                           \
  66                 get_cache_size(1, CACHE_TYPE_INST));            \
  67         NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY,                       \
  68                 get_cache_geometry(1, CACHE_TYPE_INST));        \
  69         NEW_AUX_ENT(AT_L1D_CACHESIZE,                           \
  70                 get_cache_size(1, CACHE_TYPE_DATA));            \
  71         NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY,                       \
  72                 get_cache_geometry(1, CACHE_TYPE_DATA));        \
  73         NEW_AUX_ENT(AT_L2_CACHESIZE,                            \
  74                 get_cache_size(2, CACHE_TYPE_UNIFIED));         \
  75         NEW_AUX_ENT(AT_L2_CACHEGEOMETRY,                        \
  76                 get_cache_geometry(2, CACHE_TYPE_UNIFIED));     \
  77 } while (0)
  78 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
  79 struct linux_binprm;
  80 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
  81         int uses_interp);
  82 #endif /* CONFIG_MMU */
  83
  84 #endif /* _ASM_RISCV_ELF_H */