Add API for obtaining extended machine context states that cannot be fit into existing mcontext_t. On i386 and amd64 do return the extended FPU states using getcontextx(3). For other architectures, getcontextx(3) returns the same information as getcontext(2). MFC r230864: Make the sys/ucontext.h self-contained by changing the return type of __getcontextx_size(3) from size_t to int.
Make sure that stack is 16-byte aligned before calling a function, as it is required by amd64 ABI. Add a comment for the places were the stack is accidentally properly aligned already. PR: amd64/162214
Approved by: re (kib) Pointed out by: brueffer Pointy hat to: gnn
on amd64. Submitted by: Guillaume Morin (guillaume at morinfr.org) Reviewed by: kib, jhb Approved by: re (bz) MFC after: 1 month
made the neccessary provisions. Reported by: arundel
as they are slower than the generic version in C, at least on modern hardware. This leaves us with just five implementations. Suggested by: bde Approved by: rpaulo (mentor)
r212976): order the incoming arguments to fscale as st(0), st(1), and mark temp2 volatile (only in case of compilation with clang) to force clang to pop it correctly. No binary change when compiled with gcc. This fixes ldexp() when compiled with clang on amd64, which makes drand48() and friends work correctly again, and this in turn fixes perl's tempfile(). Reported by: Renato Botelho, Derek Tattersall Approved by: rpaulo (mentor)
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
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.