src-test2/lib/libc/powerpc, branch release/8.4.0

MFC 230260-230262,230269,230270,230426,230429,230538,230765,230766,230864,

2012-06-13T15:25:52Z

232520 (partial),235563: Add support for the extended FPU states on amd64, both for native 64bit and 32bit ABIs. As a side-effect, it enables AVX on capable CPUs. In particular: - Query the CPU support for XSAVE, list of the supported extensions and the required size of FPU save area. The hw.use_xsave tunable is provided for disabling XSAVE, and hw.xsave_mask may be used to select the enabled extensions. - Remove the FPU save area from PCB and dynamically allocate the (run-time sized) user save area on the top of the kernel stack, right above the PCB. Reorganize the thread0 PCB initialization to postpone it after BSP is queried for save area size. - The dumppcb, stoppcbs and susppcbs now do not carry the FPU state as well. FPU state is only useful for suspend, where it is saved in dynamically allocated suspfpusave area. - Use XSAVE and XRSTOR to save/restore FPU state, if supported and enabled. - Define new mcontext_t flag _MC_HASFPXSTATE, indicating that mcontext_t has a valid pointer to out-of-struct extended FPU state. Signal handlers are supplied with stack-allocated fpu state. The sigreturn(2) and setcontext(2) syscall honour the flag, allowing the signal handlers to inspect and manipilate extended state in the interrupted context. - The getcontext(2) never returns extended state, since there is no place in the fixed-sized mcontext_t to place variable-sized save area. And, since mcontext_t is embedded into ucontext_t, makes it impossible to fix in a reasonable way. Provide a sysarch(2) facility to query extended FPU state. - Add API for obtaining extended machine context states that cannot be fit into existing mcontext_t. On i386 and amd64 return the extended FPU states using getcontextx(3). For other architectures, getcontextx(3) returns the same information as getcontext(2). - Add ptrace(2) support for getting and setting extended state; while there, implement missed PT_I386_{GET,SET}XMMREGS for 32bit binaries. - Change fpu_kern KPI to not expose struct fpu_kern_ctx layout to consumers, making it opaque. Internally, struct fpu_kern_ctx now contains a space for the extended state. Convert in-kernel consumers of fpu_kern KPI both on i386 and amd64. Reviewed by: kib

MFC r218909:

2011-02-24T10:23:22Z

Fix typos - remove duplicate "the". PR: bin/154928 Submitted by: Eitan Adler

Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.

2008-11-09T10:45:13Z

Looking at our source code history, it seems the uname(), getdomainname() and setdomainname() system calls got deprecated somewhere after FreeBSD 1.1, but they have never been phased out properly. Because we don't have a COMPAT_FREEBSD1, just use COMPAT_FREEBSD4. Also fix the Linuxolator to build without the setdomainname() routine by just making it call userland_sysctl on kern.domainname. Also replace the setdomainname()'s implementation to use this approach, because we're duplicating code with sysctl_domainname(). I wasn't able to keep these three routines working in our COMPAT_FREEBSD32, because that would require yet another keyword for syscalls.master (COMPAT4+NOPROTO). Because this routine is probably unused already, this won't be a problem in practice. If it turns out to be a problem, we'll just restore this functionality. Reviewed by: rdivacky, kib

Fix some ifdef logic in the libc syncicache() bit that I somehow missed in the

2008-09-24T01:06:11Z

last commit. Now it really can use a runtime-set cacheline size.

Allow the cacheline size on PowerPC to be set at runtime. This is essential for

2008-09-24T00:28:46Z

supporting 64-bit CPUs, which often have 128-byte cache lines instead of the standard 32.

Add support files for compiling with soft-float. This has been

2008-04-27T18:34:34Z

copied from ARM and modified to warrant the duplication. Oh, and to make it work for PowerPC :-)

Let PowerPC world optionally build with -msoft-float. For FPU-less PowerPC

2008-02-24T19:22:53Z

variations (e500 currently), this provides a gcc-level FPU emulation and is an alternative approach to the recently introduced kernel-level emulation (FPU_EMU). Approved by: cognet (mentor) MFp4: e500

Fix build from errors exposed with recent version_gen.awk commit.

2007-10-18T07:23:31Z

Not quite sure if this is 100% correct: awaiting review. But quieten tinderbox in the meantime.

Classify mmap, lseek, pread, pwrite, truncate, ftruncate as pseudo

2007-07-04T23:23:01Z

syscalls, unless WITHOUT_SYSCALL_COMPAT is defined. The default case will have the .c wrappers still. If you define WITHOUT_SYSCALL_COMPAT, the .c wrappers will go away and libc will make direct syscalls. After 7-stable starts, the direct syscall method will be default. Approved by: re (kensmith)

Fix bogon in previous commit: is still needed.

2007-06-10T16:32:08Z