freebsd with flexible iflib nic queues
f263e440d4
dtrace_probe(). Arguments beyond these five must be obtained in an architecture-specific way; this can be done through the getargval provider method, and through dtrace_getarg() if getargval isn't overridden. This change fixes two off-by-one bugs in the way these arguments are fetched in FreeBSD's DTrace implementation. First, the SDT provider must set the aframes parameter to 1 when creating a probe. The aframes parameter controls the number of frames that dtrace_getarg() will step over in order to find the frame containing the extra arguments. On FreeBSD, dtrace_getarg() is called in SDT probe context via dtrace_probe()->dtrace_dif_emulate()->dtrace_dif_variable->dtrace_getarg() so aframes must be 3 since the arguments are in dtrace_probe()'s frame; it was previously being called with a value of 2 instead. illumos uses a different aframes value for SDT probes, but this is because illumos SDT probes fire by triggering the #UD fault handler rather than calling dtrace_probe() directly. The second bug has to do with the way arguments are grabbed out dtrace_probe()'s frame on amd64. The code currently jumps over the first stack argument and retrieves the rest of them using a pointer into the stack. This works on i386 because all of dtrace_probe()'s arguments will be on the stack and the first argument is the probe ID, which should be ignored. However, it is incorrect to ignore the first stack argument on amd64, so we correct the pointer used to access the arguments. MFC after: 2 weeks |
||
|---|---|---|
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ 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, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. 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. games Amusements. 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. sys Kernel sources. 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: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html