9989f41fd3
- add arm64 dependent codes with GICv3 and SVE support - fix bugs based on architecture separation requests
61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
/* elfnote.h COPYRIGHT FUJITSU LIMITED 2016 */
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/* @ref.impl include/linux/elfnote.h */
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/*
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* Helper macros to generate ELF Note structures, which are put into a
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* PT_NOTE segment of the final vmlinux image. These are useful for
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* including name-value pairs of metadata into the kernel binary (or
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* modules?) for use by external programs.
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*
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* Each note has three parts: a name, a type and a desc. The name is
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* intended to distinguish the note's originator, so it would be a
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* company, project, subsystem, etc; it must be in a suitable form for
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* use in a section name. The type is an integer which is used to tag
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* the data, and is considered to be within the "name" namespace (so
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* "FooCo"'s type 42 is distinct from "BarProj"'s type 42). The
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* "desc" field is the actual data. There are no constraints on the
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* desc field's contents, though typically they're fairly small.
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*
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* All notes from a given NAME are put into a section named
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* .note.NAME. When the kernel image is finally linked, all the notes
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* are packed into a single .notes section, which is mapped into the
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* PT_NOTE segment. Because notes for a given name are grouped into
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* the same section, they'll all be adjacent the output file.
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*
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* This file defines macros for both C and assembler use. Their
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* syntax is slightly different, but they're semantically similar.
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*
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* See the ELF specification for more detail about ELF notes.
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*/
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#ifndef __HEADER_ARM64_COMMON_ELFNOTE_H
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#define __HEADER_ARM64_COMMON_ELFNOTE_H
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#ifdef __ASSEMBLER__
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/*
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* Generate a structure with the same shape as Elf{32,64}_Nhdr (which
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* turn out to be the same size and shape), followed by the name and
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* desc data with appropriate padding. The 'desctype' argument is the
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* assembler pseudo op defining the type of the data e.g. .asciz while
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* 'descdata' is the data itself e.g. "hello, world".
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*
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* e.g. ELFNOTE(XYZCo, 42, .asciz, "forty-two")
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* ELFNOTE(XYZCo, 12, .long, 0xdeadbeef)
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*/
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#define ELFNOTE_START(name, type, flags) \
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.pushsection .note.name, flags,@note ; \
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.balign 4 ; \
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.long 2f - 1f /* namesz */ ; \
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.long 4484f - 3f /* descsz */ ; \
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.long type ; \
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1:.asciz #name ; \
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2:.balign 4 ; \
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3:
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#define ELFNOTE_END \
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4484:.balign 4 ; \
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.popsection ;
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#endif /* __ASSEMBLER__ */
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#endif /* !__HEADER_ARM64_COMMON_ELFNOTE_H */
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