382e67aec6
Provide the necessary changes to be able to execute ELF-FDPIC binaries on ARM systems with an MMU. The default for CONFIG_BINFMT_ELF_FDPIC is also set to n if the regular ELF loader is already configured so not to force FDPIC support on everyone. Given that CONFIG_BINFMT_ELF depends on CONFIG_MMU, this means CONFIG_BINFMT_ELF_FDPIC will still default to y when !MMU. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Mickael GUENE <mickael.guene@st.com> Tested-by: Vincent Abriou <vincent.abriou@st.com> Tested-by: Andras Szemzo <szemzo.andras@gmail.com>
49 lines
914 B
C
49 lines
914 B
C
#ifndef __ARM_MMU_H
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#define __ARM_MMU_H
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#ifdef CONFIG_MMU
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typedef struct {
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#ifdef CONFIG_CPU_HAS_ASID
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atomic64_t id;
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#else
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int switch_pending;
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#endif
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unsigned int vmalloc_seq;
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unsigned long sigpage;
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#ifdef CONFIG_VDSO
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unsigned long vdso;
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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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#ifdef CONFIG_CPU_HAS_ASID
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#define ASID_BITS 8
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#define ASID_MASK ((~0ULL) << ASID_BITS)
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#define ASID(mm) ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
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#else
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#define ASID(mm) (0)
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#endif
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#else
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/*
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* From nommu.h:
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* Copyright (C) 2002, David McCullough <davidm@snapgear.com>
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* modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
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*/
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typedef struct {
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unsigned long end_brk;
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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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#endif
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#endif
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