2a8986fc5e
In order to have all task compat bit access directly in compat.h, introduce set_compat_task() to set/reset those when needed. Also, since it's only used on an if/else scenario, simplify the macro using it. Signed-off-by: Leonardo Bras <leobras@redhat.com> Reviewed-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20240103160024.70305-7-leobras@redhat.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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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#ifndef _ASM_RISCV_ELF_H
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#define _ASM_RISCV_ELF_H
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#include <uapi/linux/elf.h>
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#include <linux/compat.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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#include <asm/cacheinfo.h>
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#include <asm/cpufeature.h>
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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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#ifndef ELF_CLASS
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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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#endif
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#define ELF_DATA ELFDATA2LSB
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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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((x)->e_ident[EI_CLASS] == ELF_CLASS))
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extern bool compat_elf_check_arch(Elf32_Ehdr *hdr);
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#define compat_elf_check_arch compat_elf_check_arch
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#define CORE_DUMP_USE_REGSET
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#define ELF_FDPIC_CORE_EFLAGS 0
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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 ((DEFAULT_MAP_WINDOW / 3) * 2)
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#ifdef CONFIG_64BIT
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#define STACK_RND_MASK (is_compat_task() ? \
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0x7ff >> (PAGE_SHIFT - 12) : \
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0x3ffff >> (PAGE_SHIFT - 12))
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#endif
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/*
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* Provides information on the availiable set of ISA extensions to userspace,
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* via a bitmap that coorespends to each single-letter ISA extension. This is
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* essentially defunct, but will remain for compatibility with userspace.
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*/
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#define ELF_HWCAP riscv_get_elf_hwcap()
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extern unsigned long elf_hwcap;
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#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
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do { \
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(_r)->a1 = _exec_map_addr; \
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(_r)->a2 = _interp_map_addr; \
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(_r)->a3 = dynamic_addr; \
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} while (0)
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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 COMPAT_ELF_PLATFORM (NULL)
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#define ARCH_DLINFO \
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do { \
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/* \
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* Note that we add ulong after elf_addr_t because \
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* casting current->mm->context.vdso triggers a cast \
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* warning of cast from pointer to integer for \
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* COMPAT ELFCLASS32. \
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*/ \
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NEW_AUX_ENT(AT_SYSINFO_EHDR, \
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(elf_addr_t)(ulong)current->mm->context.vdso); \
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NEW_AUX_ENT(AT_L1I_CACHESIZE, \
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get_cache_size(1, CACHE_TYPE_INST)); \
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NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, \
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get_cache_geometry(1, CACHE_TYPE_INST)); \
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NEW_AUX_ENT(AT_L1D_CACHESIZE, \
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get_cache_size(1, CACHE_TYPE_DATA)); \
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NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, \
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get_cache_geometry(1, CACHE_TYPE_DATA)); \
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NEW_AUX_ENT(AT_L2_CACHESIZE, \
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get_cache_size(2, CACHE_TYPE_UNIFIED)); \
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NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, \
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get_cache_geometry(2, CACHE_TYPE_UNIFIED)); \
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NEW_AUX_ENT(AT_L3_CACHESIZE, \
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get_cache_size(3, CACHE_TYPE_UNIFIED)); \
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NEW_AUX_ENT(AT_L3_CACHEGEOMETRY, \
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get_cache_geometry(3, CACHE_TYPE_UNIFIED)); \
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/* \
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* Should always be nonzero unless there's a kernel bug. \
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* If we haven't determined a sensible value to give to \
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* userspace, omit the entry: \
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*/ \
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if (likely(signal_minsigstksz)) \
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NEW_AUX_ENT(AT_MINSIGSTKSZ, signal_minsigstksz); \
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else \
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NEW_AUX_ENT(AT_IGNORE, 0); \
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} while (0)
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#ifdef CONFIG_MMU
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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 /* CONFIG_MMU */
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#define ELF_CORE_COPY_REGS(dest, regs) \
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do { \
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*(struct user_regs_struct *)&(dest) = \
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*(struct user_regs_struct *)regs; \
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} while (0);
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#ifdef CONFIG_COMPAT
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#define SET_PERSONALITY(ex) \
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do { set_compat_task((ex).e_ident[EI_CLASS] == ELFCLASS32); \
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if (personality(current->personality) != PER_LINUX32) \
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set_personality(PER_LINUX | \
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(current->personality & (~PER_MASK))); \
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} while (0)
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#define COMPAT_ELF_ET_DYN_BASE ((TASK_SIZE_32 / 3) * 2)
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/* rv32 registers */
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typedef compat_ulong_t compat_elf_greg_t;
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typedef compat_elf_greg_t compat_elf_gregset_t[ELF_NGREG];
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extern int compat_arch_setup_additional_pages(struct linux_binprm *bprm,
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int uses_interp);
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#define compat_arch_setup_additional_pages \
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compat_arch_setup_additional_pages
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#endif /* CONFIG_COMPAT */
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#endif /* _ASM_RISCV_ELF_H */
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