1713ce7c43
Define the layout of the data structure shared between kernel and userspace. Track the vdso address in the mm_context; needed for communicating AT_SYSINFO_EHDR to the ELF loader. Add declarations for arm_install_vdso; implementation is in a following patch. Define AT_SYSINFO_EHDR, and, if CONFIG_VDSO=y, report the vdso shared object address via the ELF auxiliary vector. Note - this adds the AT_SYSINFO_EHDR in a new user-visible header asm/auxvec.h; this is consistent with other architectures. Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
32 lines
503 B
C
32 lines
503 B
C
#ifndef __ASM_VDSO_H
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#define __ASM_VDSO_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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struct mm_struct;
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#ifdef CONFIG_VDSO
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void arm_install_vdso(struct mm_struct *mm, unsigned long addr);
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extern char vdso_start, vdso_end;
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extern unsigned int vdso_total_pages;
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#else /* CONFIG_VDSO */
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static inline void arm_install_vdso(struct mm_struct *mm, unsigned long addr)
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{
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}
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#define vdso_total_pages 0
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#endif /* CONFIG_VDSO */
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_VDSO_H */
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