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| 2 | |
| 3 | * Copyright (C) 2015 Imagination Technologies
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| 4 | * Author: Alex Smith <[email protected]>
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| 5 |
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| 6 |
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| 7 | #ifndef __ASM_VDSO_H
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| 8 | #define __ASM_VDSO_H
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| 9 |
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| 10 | #include <linux/mm_types.h>
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| 11 | #include <vdso/datapage.h>
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| 12 |
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| 13 | #include <asm/barrier.h>
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| 14 |
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| 15 | |
| 16 | * struct mips_vdso_image - Details of a VDSO image.
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| 17 | * @data: Pointer to VDSO image data (page-aligned).
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| 18 | * @size: Size of the VDSO image data (page-aligned).
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| 19 | * @off_sigreturn: Offset of the sigreturn() trampoline.
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| 20 | * @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline.
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| 21 | * @mapping: Special mapping structure.
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| 22 | *
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| 23 | * This structure contains details of a VDSO image, including the image data
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| 24 | * and offsets of certain symbols required by the kernel. It is generated as
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| 25 | * part of the VDSO build process, aside from the mapping page array, which is
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| 26 | * populated at runtime.
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| 27 |
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| 28 | struct mips_vdso_image {
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| 29 | void *data;
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| 30 | unsigned long size;
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| 31 |
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| 32 | unsigned long off_sigreturn;
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| 33 | unsigned long off_rt_sigreturn;
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| 34 |
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| 35 | struct vm_special_mapping mapping;
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| 36 | };
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| 37 |
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| 38 | |
| 39 | * The following structures are auto-generated as part of the build for each
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| 40 | * ABI by genvdso, see arch/mips/vdso/Makefile.
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| 41 |
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| 42 |
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| 43 | extern struct mips_vdso_image vdso_image;
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| 44 |
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| 45 | #ifdef CONFIG_MIPS32_O32
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| 46 | extern struct mips_vdso_image vdso_image_o32;
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| 47 | #endif
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| 48 |
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| 49 | #ifdef CONFIG_MIPS32_N32
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| 50 | extern struct mips_vdso_image vdso_image_n32;
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| 51 | #endif
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| 52 |
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| 53 | #endif
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