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Define NT_FREEBSD_FEATURE_CTL ELF note type

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This ELF note will be used to allow binaries to opt out of, or in to,
upcoming vulnerability mitigation and other features.

Committing the definition and readelf change separately to allow
independent MFC.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
emaste 2018-11-02 19:02:03 +00:00
parent cb3065b222
commit 6957cb73fe
2 changed files with 2 additions and 0 deletions
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1
contrib/elftoolchain/readelf/readelf.c
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@ -1121,6 +1121,7 @@ note_type_freebsd(unsigned int nt)
case 1: return "NT_FREEBSD_ABI_TAG";
case 2: return "NT_FREEBSD_NOINIT_TAG";
case 3: return "NT_FREEBSD_ARCH_TAG";
case 4: return "NT_FREEBSD_FEATURE_CTL";
default: return (note_type_unknown(nt));
}
}

1
sys/sys/elf_common.h
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@ -759,6 +759,7 @@ typedef struct {
#define NT_FREEBSD_ABI_TAG 1
#define NT_FREEBSD_NOINIT_TAG 2
#define NT_FREEBSD_ARCH_TAG 3
#define NT_FREEBSD_FEATURE_CTL 4
/* Values for n_type. Used in core files. */
#define NT_PRSTATUS 1 /* Process status. */