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* Remove stray whitespaces from sys/amd64/Joshua Rogers2024-09-211-1/+1
| | | | | | Signed-off-by: Joshua Rogers <Joshua@Joshua.Hu> Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/1418
* sys: Remove ancient SCCS tags.Warner Losh2023-11-271-2/+0
| | | | | | | | Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
* sys: Remove $FreeBSD$: one-line .h patternWarner Losh2023-08-161-1/+0
| | | | Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/
* amd64: -m32 support for machine/asm(macros).hBrooks Davis2022-06-131-0/+6
| | | | | | | Install the i386 versions under /usr/include/i386 on amd64 and include when targeting i386. Reviewed by: jhb, imp
* amd64: Add CFI directives for libc syscall stubsConrad Meyer2019-10-231-4/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No functional change (in program code). Additional DWARF metadata is generated in the .eh_frame section. Also, it is now a compile-time requirement that machine/asm.h ENTRY() and END() macros are paired. (This is subject to ongoing discussion and may change.) This DWARF metadata allows llvm-libunwind to unwind program stacks when the program is executing the function. The goal is to collect accurate userspace stacktraces when programs have entered syscalls. (The motivation for "Call Frame Information," or CFI for short -- not to be confused with Control Flow Integrity -- is to sufficiently annotate assembly functions such that stack unwinders can unwind out of the local frame without the requirement of a dedicated framepointer register; i.e., -fomit-frame-pointer. This is necessary for C++ exception handling or collecting backtraces.) For the curious, a more thorough description of the metadata and some examples may be found at [1] and documentation at [2]. You can also look at 'cc -S -o - foo.c | less' and search for '.cfi_' to see the CFI directives generated by your C compiler. [1]: https://www.imperialviolet.org/2017/01/18/cfi.html [2]: https://sourceware.org/binutils/docs/as/CFI-directives.html Reviewed by: emaste, kib (with reservations) Differential Revision: https://reviews.freebsd.org/D22122 Notes: svn path=/head/; revision=353959
* Remove lint support from system headers and MD x86 headers.Konstantin Belousov2017-11-231-2/+2
| | | | | | | | | | Reviewed by: dim, jhb Discussed with: imp Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D13156 Notes: svn path=/head/; revision=326123
* sys: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326023
* Renumber copyright clause 4Warner Losh2017-02-281-1/+1
| | | | | | | | | | | | Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96 Notes: svn path=/head/; revision=314436
* Revert r274772: it is not valid on MIPSEd Maste2014-11-251-1/+1
| | | | | | | Reported by: sbruno Notes: svn path=/head/; revision=275004
* Use canonical __PIC__ flagEd Maste2014-11-211-1/+1
| | | | | | | | | | | It is automatically set when -fPIC is passed to the compiler. Reviewed by: dim, kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D1179 Notes: svn path=/head/; revision=274772
* Introduce a WEAK_REFERENCE() alias and use it. Get rid of the CNAME and theAndreas Tobler2013-11-211-0/+9
| | | | | | | | | CONCAT macros in SYS.h. Reviewed by: bde, kib Notes: svn path=/head/; revision=258447
* libc: Access _logname_valid more efficiently.Jilles Tjoelker2013-08-171-1/+0
| | | | | | | | | | | | | | The variable _logname_valid is not exported via the version script; therefore, change C and i386/amd64 assembler code to remove indirection (which allowed interposition). This makes the code slightly smaller and faster. Also, remove #define PIC_GOT from i386/amd64 in !PIC mode. Without PIC, there is no place containing the address of each variable, so there is no possible definition for PIC_GOT. Notes: svn path=/head/; revision=254463
* Define an END() macro for use in i386 and amd64 assembly code, akinJoseph Koshy2007-08-221-0/+2
| | | | | | | | | to the one available on the ia64, sparc64, and sun4v architectures. Approved by: re (kensmith) Notes: svn path=/head/; revision=171914
* Align the entry point to assembly language functions to a 16-byte boundary.Alan Cox2005-04-101-2/+1
| | | | | | | | (The Opteron's instruction fetcher reads instructions from the L1 cache in 16-byte, aligned packets.) Notes: svn path=/head/; revision=144884
* Argh. Add the mini-stack-frame back in for mcount's benefit for syscallPeter Wemm2004-06-101-0/+4
| | | | | | | stubs. Notes: svn path=/head/; revision=130322
* Remove advertising clause from University of California Regent's license,Warner Losh2004-04-051-4/+0
| | | | | | | | | per letter dated July 22, 1999. Approved by: core Notes: svn path=/head/; revision=127914
* MFi386: i386/include/asm.h rev 1.11: Do not abuse ##.Peter Wemm2003-06-021-1/+1
| | | | Notes: svn path=/head/; revision=115678
* Stop profiled libc from exploding, matching gcc's generated code.Peter Wemm2003-05-241-4/+0
| | | | | | | Approved by: re (amd64/* blanket) Notes: svn path=/head/; revision=115283
* Remove _ARCH_INDIRECT ifdefs. They existed for lib/msun/* on i386, whichPeter Wemm2003-05-101-63/+0
| | | | | | | | | | | could use different versions of the math code depending on whether there was real floating point hardware or math emulation. Since the fpu is part of the core specification on amd64, there is no need for this here. Approved by: re (blanket amd64/*) Notes: svn path=/head/; revision=114869
* Commit MD parts of a loosely functional AMD64 port. This is based onPeter Wemm2003-05-011-33/+19
| | | | | | | | | | | | | | | | | | | | | | | | | a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt. Notes: svn path=/head/; revision=114349
* PIC_GOTOFF is OBE.Peter Wemm2002-09-231-2/+0
| | | | Notes: svn path=/head/; revision=103850
* Initiate deorbit burn for the i386-only a.out related support. Moves arePeter Wemm2002-09-171-9/+0
| | | | | | | | | | | | | | | | | | under way to move the remnants of the a.out toolchain to ports. As the comment in src/Makefile said, this stuff is deprecated and one should not expect this to remain beyond 4.0-REL. It has already lasted WAY beyond that. Notable exceptions: gcc - I have not touched the a.out generation stuff there. ldd/ldconfig - still have some code to interface with a.out rtld. old as/ld/etc - I have not removed these yet, pending their move to ports. some includes - necessary for ldd/ldconfig for now. Tested on: i386 (extensively), alpha Notes: svn path=/head/; revision=103436
* ASM versions of __FBSDID.David E. O'Brien2002-03-231-0/+11
| | | | Notes: svn path=/head/; revision=92998
* Fixed the profiling version ALTENTRY(). Again. The previous versionBruce Evans2000-01-251-5/+9
| | | | | | | | didn't set up the frame pointer before calling mcount, and then jumped to the wrong place in ENTRY() to defeat the point of the jump. Notes: svn path=/head/; revision=56581
* Move ENTRY and ALTENTRY definitions to asm.h where they belong.Jason Evans2000-01-201-1/+4
| | | | | | | | | Unbreak profiling. Again. Submitted by: bde Notes: svn path=/head/; revision=56309
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Fixed longstanding profiling bug. The frame pointer wasn't set upBruce Evans1997-04-231-63/+23
| | | | | | | | | | | | | | | | | | | | | | for syscalls, so one frame was lost in backtraces from syscalls. This is handled better in the kernel by using a different mcount entry point for profiling before the frame pointer is set up. Expand RCSID(). Use .p2align instead of the ambiguous .align. Added idempotency ifdef. Removed unused macros ALTENTRY(), ALTASENTRY(), ASENTRY(), _MID_ENTRY. Cleaned up formatting. Reviewed by: jdp reviewed an old version Obtained from: parts from NetBSD Notes: svn path=/head/; revision=25111
* Only do indirections in ENTRY() if _ARCH_INDIRECT is defined.Bruce Evans1997-04-151-5/+8
| | | | Notes: svn path=/head/; revision=24965
* Moved userland assembler macros from <machine/asmacros.h> toBruce Evans1997-03-091-1/+82
| | | | | | | <machine/asm.h>. Notes: svn path=/head/; revision=23576
* Cloned src/lib/libc/i386/DEFS.h to create <machine/asm.h> for the i386.Bruce Evans1997-03-091-0/+120
The former file was too hard to get at from other parts of the src tree and will go away. Notes: svn path=/head/; revision=23571
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