Author: emaste
Date: Mon May 4 15:57:13 2020
New Revision: 360632
URL: https://svnweb.freebsd.org/changeset/base/360632
Log:
MFC r340701: Add NT_FREEBSD_FEATURE_CTL ELF note to csu
This note will be used to allow binaries to opt out of, or in to,
upcoming vulnerability mitigation and other features. It is not yet
connected but being added now to facilitate testing and ensure
compatibility with existing kernels and tools.
Sponsored by: The FreeBSD Foundation
Modified:
stable/12/lib/csu/common/crtbrand.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/lib/csu/common/crtbrand.c
==============================================================================
--- stable/12/lib/csu/common/crtbrand.c Mon May 4 15:07:57 2020
(r360631)
+++ stable/12/lib/csu/common/crtbrand.c Mon May 4 15:57:13 2020
(r360632)
@@ -67,3 +67,18 @@ static const struct {
.name = NOTE_FREEBSD_VENDOR,
.desc = __FreeBSD_version
};
+
+static const struct {
+ int32_t namesz;
+ int32_t descsz;
+ int32_t type;
+ char name[sizeof(NOTE_FREEBSD_VENDOR)];
+ uint32_t desc[1];
+} crt_feature_ctl __attribute__ ((section (NOTE_SECTION),
+ aligned(4))) __used = {
+ .namesz = sizeof(NOTE_FREEBSD_VENDOR),
+ .descsz = sizeof(uint32_t),
+ .type = NT_FREEBSD_FEATURE_CTL,
+ .name = NOTE_FREEBSD_VENDOR,
+ .desc = { 0 }
+};
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