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2129a235c0
This patch contains the code that interfaces with ELF objects on RISC-V systems, the vast majority of which is present to load kernel modules. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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* Copyright (C) 2012 Regents of the University of California
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _ASM_RISCV_ELF_H
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#define _ASM_RISCV_ELF_H
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#include <uapi/asm/elf.h>
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#include <asm/auxvec.h>
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#include <asm/byteorder.h>
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/* TODO: Move definition into include/uapi/linux/elf-em.h */
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#define EM_RISCV 0xF3
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_ARCH EM_RISCV
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#ifdef CONFIG_64BIT
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#define ELF_CLASS ELFCLASS64
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#else
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#define ELF_CLASS ELFCLASS32
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#endif
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#if defined(__LITTLE_ENDIAN)
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#define ELF_DATA ELFDATA2LSB
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#elif defined(__BIG_ENDIAN)
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#define ELF_DATA ELFDATA2MSB
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#else
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#error "Unknown endianness"
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#endif
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
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#define CORE_DUMP_USE_REGSET
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#define ELF_EXEC_PAGESIZE (PAGE_SIZE)
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/*
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* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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* use of this is to invoke "./ld.so someprog" to test out a new version of
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* the loader. We need to make sure that it is out of the way of the program
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* that it will "exec", and that there is sufficient room for the brk.
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*/
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#define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2)
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/*
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* This yields a mask that user programs can use to figure out what
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* instruction set this CPU supports. This could be done in user space,
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* but it's not easy, and we've already done it here.
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*/
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#define ELF_HWCAP (elf_hwcap)
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extern unsigned long elf_hwcap;
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/*
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* This yields a string that ld.so will use to load implementation
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* specific libraries for optimization. This is more specific in
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* intent than poking at uname or /proc/cpuinfo.
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*/
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#define ELF_PLATFORM (NULL)
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#define ARCH_DLINFO \
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do { \
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NEW_AUX_ENT(AT_SYSINFO_EHDR, \
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(elf_addr_t)current->mm->context.vdso); \
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} while (0)
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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
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struct linux_binprm;
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extern int arch_setup_additional_pages(struct linux_binprm *bprm,
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int uses_interp);
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#endif /* _ASM_RISCV_ELF_H */
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