Apply a linker script when linking i386 kernel modules to apply padding to a set_pcpu or set_vnet section. The padding value is kind-of random and is used to catch modules not compiled with the linker-script, so possibly still having problems leading to kernel panics. This is needed as the code generated on certain architectures for non-simple-types, e.g., an array can generate an absolute relocation on the edge (just outside) the section and thus will not be properly relocated. Adding the padding to the end of the section will ensure that even absolute relocations of complex types will be inside the section, if they are the last object in there and hence relocation will work properly and avoid panics such as observed with carp.ko or ipsec.ko. There is a rather lengthy discussion of various options to apply in the mentioned PRs and their depends/blocks, and the review. There seems no best solution working across multiple toolchains and multiple version of them, so I took the liberty of taking one, as currently our users (and our CI system) are hitting this on just i386 and we need some solution. I wish we would have a proper fix rather than another "hack". Also backout r340009 which manually, temporarily fixed CARP before 12.0-R "by chance" after a lead-up of various other link-elf.c and related fixes. PR: 230857,238012 With suggestions from: arichardson (originally last year) Tested by: lwhsu Event: Waterloo Hackathon 2019 Reported by: lwhsu, olivier MFC after: 6 weeks Differential Revision: https://reviews.freebsd.org/D17512 |
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bin | ||
cddl | ||
contrib | ||
crypto | ||
etc | ||
gnu | ||
include | ||
kerberos5 | ||
lib | ||
libexec | ||
release | ||
rescue | ||
sbin | ||
secure | ||
share | ||
stand | ||
sys | ||
targets | ||
tests | ||
tools | ||
usr.bin | ||
usr.sbin | ||
.arcconfig | ||
.arclint | ||
.cirrus.yml | ||
.clang-format | ||
.gitattributes | ||
.gitignore | ||
COPYRIGHT | ||
LOCKS | ||
MAINTAINERS | ||
Makefile | ||
Makefile.inc1 | ||
Makefile.libcompat | ||
Makefile.sys.inc | ||
ObsoleteFiles.inc | ||
README | ||
README.md | ||
UPDATING |
FreeBSD Source:
This is the top level of the FreeBSD source directory. This file
was last revised on:
FreeBSD
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
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Source Roadmap:
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cddl Various commands and libraries under the Common Development
and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
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gnu Various commands and libraries under the GNU Public License.
Please see gnu/COPYING* for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
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used in release builds. NOTES contains documentation of
all possible entries.
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