src/lib/libc/amd64/sys, branch releng/9.1

Add section .note.GNU-stack for assembly files used by 386 and amd64.

2011-01-07T16:08:40+00:00

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

2008-11-09T10:45:13+00:00

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

We've been lax about matching END() macros in asm code for some time. This

2008-11-02T01:10:54+00:00

is used to set the ELF size attribute for functions.  It isn't normally
critical but some things can make use of it (gdb for stack traces).
Valgrind needs it so I'm adding it in.  The problem is present on all
branches and on both i386 and amd64.

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

2007-07-04T23:23:01+00:00

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)

Per Regents of the University of Calfornia letter, remove advertising

2007-01-09T00:28:16+00:00

clause.

# If I've done so improperly on a file, please let me know.

Do not try to store 64 bits into 32 bit errno variable. With the changed libc

2005-04-21T12:47:08+00:00

data layout, this was corrupting _PathLocale variable leading to programs
dumping core in non-default locales.

Fix brk(3). The stack was unbalanced when we jumped to cerror. Oops!

2004-10-27T17:11:43+00:00

This causes nasty things like SEGV or a cpu spin when we return.

Submitted by: "James R. Van Artsalen"

Change the syscall stub branch orders so that the static branch prediction

2004-02-22T02:11:39+00:00

will assume that syscalls will succeed rather than fail.

Provide sysarch(2) prototypes in the MD sysarch.h headers. While I'm

2004-01-09T16:52:09+00:00

at it, use the ANSI C generic pointer type for the second argument,
thus matching the documentation.

Remove the now extraneous (and now conflicting) function declarations
in various libc sources.  Remove now unnecessary casts.

Reviewed by:	bde

Add implementations of amd64_[gs]et_[fg]sbase().

2003-10-23T06:07:09+00:00