Hi, Roland McGrath, le Tue 05 Dec 2006 00:18:52 -0800, a écrit : > gnumach doesn't support newer fpu state for mmx/xmm et al. > would need new thread state flavor for "fpx" or whatever we call it. > cf linux asm/user.h user_i387_struct vs user_fxsr_struct > former is what mach can handle. need to handle latter in ctx sw + user > thread state flavor, then enable cpu support bits (cr4 bit i think).
There's a bit of work to do both in the Hurd and glibc too, because of GNU Mach's thread_get_state(i386_FLOAT_STATE) call. - hurd/exec/elfcore.c:fetch_thread_fpregset(): in the core dump, fpx state would probably be needed too. - libc/sysdeps/mach/hurd/i386/trampoline.c:_hurd_setup_sighandler(): in the sigcontext structure, fpx state would be useful too. Both of these are not really _required_ for now, but we need to think about the interface as soon as now. I guess modifying the behavior of thread_get_state(i386_FLOAT_STATE) is out of question, so should we define a new thread_get_state(i386_FLOAT_XSTATE)? Samuel _______________________________________________ Bug-hurd mailing list Bug-hurd@gnu.org http://lists.gnu.org/mailman/listinfo/bug-hurd
