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9549fb354e
Add support for enabling and using the binfmt_elf_fdpic program loader on RISC-V platforms. The most important change is to setup registers during program load to pass the mapping addresses to the new process. One of the interesting features of the elf-fdpic loader is that it also allows appropriately compiled ELF format binaries to be loaded on nommu systems. Appropriate being those compiled with -pie. Signed-off-by: Greg Ungerer <gerg@kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230711130754.481209-3-gerg@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
33 lines
720 B
C
33 lines
720 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 Regents of the University of California
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*/
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#ifndef _ASM_RISCV_MMU_H
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#define _ASM_RISCV_MMU_H
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#ifndef __ASSEMBLY__
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typedef struct {
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#ifndef CONFIG_MMU
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unsigned long end_brk;
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#else
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atomic_long_t id;
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#endif
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void *vdso;
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#ifdef CONFIG_SMP
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/* A local icache flush is needed before user execution can resume. */
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cpumask_t icache_stale_mask;
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#endif
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#ifdef CONFIG_BINFMT_ELF_FDPIC
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unsigned long exec_fdpic_loadmap;
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unsigned long interp_fdpic_loadmap;
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#endif
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} mm_context_t;
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void __init create_pgd_mapping(pgd_t *pgdp, uintptr_t va, phys_addr_t pa,
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phys_addr_t sz, pgprot_t prot);
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_RISCV_MMU_H */
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