John Baldwin caa449b635 Use PT_GET_SC_ARGS and PT_GET_SC_RET in truss.
This removes all of the architecture-specific functions from truss.

A per-ABI structure is still needed to map syscall numbers to names
and FreeBSD errno values to ABI error values as well as hold syscall
counters.  However, the linker set of ABI structures is now replaced
with a simple table mapping ABI names to structures.  This approach
permits sharing the same ABI structure among separate names such as
i386 a.out and ELF binaries as well as ELF v1 vs ELF v2 for powerpc64.

A few differences are visible due to using PT_GET_SC_RET to fetch the
error value of a system call.  Note that ktrace/kdump have had the
"new" behaviors for a long time already:
- System calls that return with EJUSTRETURN or ERESTART will now be
  noticed and logged as such.  Previously sigreturn (which uses
  EJUSTRETURN) would report whatever random value was in the register
  holding errno from the previous system call for example.  Now it
  reports EJUSTRETURN.
- System calls that return errno as their error value such as
  posix_fallocate() and posix_fadvise() now report non-zero return
  values as errors instead of success with a non-zero return value.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D20963
2019-07-16 22:59:15 +00:00
2019-06-25 04:50:09 +00:00
2019-06-25 04:50:09 +00:00
2019-05-28 21:54:12 +00:00
2019-06-25 04:50:09 +00:00
2019-07-15 21:48:02 +00:00
2017-12-19 03:38:06 +00:00
2018-07-01 13:50:37 +00:00
2019-01-01 00:25:25 +00:00
2018-06-09 03:08:04 +00:00
2019-05-28 20:08:17 +00:00

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.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

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.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
		used in release builds. NOTES contains documentation of
		all possible entries.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html

Description
freebsd with flexible iflib nic queues
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