LXR linux/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#ifdef CONFIG_64BIT
  46#define STACK_RND_MASK          (0x3ffff >> (PAGE_SHIFT - 12))
  47#endif
  48/*
  49 * This yields a mask that user programs can use to figure out what
  50 * instruction set this CPU supports.  This could be done in user space,
  51 * but it's not easy, and we've already done it here.
  52 */
  53#define ELF_HWCAP       (elf_hwcap)
  54extern unsigned long elf_hwcap;
  55
  56/*
  57 * This yields a string that ld.so will use to load implementation
  58 * specific libraries for optimization.  This is more specific in
  59 * intent than poking at uname or /proc/cpuinfo.
  60 */
  61#define ELF_PLATFORM    (NULL)
  62
  63#ifdef CONFIG_MMU
  64#define ARCH_DLINFO                                             \
  65do {                                                            \
  66        NEW_AUX_ENT(AT_SYSINFO_EHDR,                            \
  67                (elf_addr_t)current->mm->context.vdso);         \
  68        NEW_AUX_ENT(AT_L1I_CACHESIZE,                           \
  69                get_cache_size(1, CACHE_TYPE_INST));            \
  70        NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY,                       \
  71                get_cache_geometry(1, CACHE_TYPE_INST));        \
  72        NEW_AUX_ENT(AT_L1D_CACHESIZE,                           \
  73                get_cache_size(1, CACHE_TYPE_DATA));            \
  74        NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY,                       \
  75                get_cache_geometry(1, CACHE_TYPE_DATA));        \
  76        NEW_AUX_ENT(AT_L2_CACHESIZE,                            \
  77                get_cache_size(2, CACHE_TYPE_UNIFIED));         \
  78        NEW_AUX_ENT(AT_L2_CACHEGEOMETRY,                        \
  79                get_cache_geometry(2, CACHE_TYPE_UNIFIED));     \
  80} while (0)
  81#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
  82struct linux_binprm;
  83extern int arch_setup_additional_pages(struct linux_binprm *bprm,
  84        int uses_interp);
  85#endif /* CONFIG_MMU */
  86
  87#define ELF_CORE_COPY_REGS(dest, regs)                  \
  88do {                                                    \
  89        *(struct user_regs_struct *)&(dest) =           \
  90                *(struct user_regs_struct *)regs;       \
  91} while (0);
  92
  93#endif /* _ASM_RISCV_ELF_H */
  94