static void ia32_get_fpcontext(struct thread *td, struct ia32_mcontext *mcp, char *xfpusave, size_t xfpusave_len) { size_t max_len, len; /* * XXX Format of 64bit and 32bit FXSAVE areas differs. FXSAVE * in 32bit mode saves %cs and %ds, while on 64bit it saves * 64bit instruction and data pointers. Ignore the difference * for now, it should be irrelevant for most applications. */ mcp->mc_ownedfp = fpugetregs(td); bcopy(get_pcb_user_save_td(td), &mcp->mc_fpstate, sizeof(mcp->mc_fpstate)); mcp->mc_fpformat = fpuformat(); if (!use_xsave || xfpusave_len == 0) return; max_len = cpu_max_ext_state_size - sizeof(struct savefpu); len = xfpusave_len; if (len > max_len) { len = max_len; bzero(xfpusave + max_len, len - max_len); } mcp->mc_flags |= _MC_HASFPXSTATE; mcp->mc_xfpustate_len = len; bcopy(get_pcb_user_save_td(td) + 1, xfpusave, len); }
static void ia32_get_fpcontext(struct thread *td, struct ia32_mcontext *mcp) { /* * XXX Format of 64bit and 32bit FXSAVE areas differs. FXSAVE * in 32bit mode saves %cs and %ds, while on 64bit it saves * 64bit instruction and data pointers. Ignore the difference * for now, it should be irrelevant for most applications. */ mcp->mc_ownedfp = fpugetregs(td); bcopy(&td->td_pcb->pcb_user_save, &mcp->mc_fpstate, sizeof(mcp->mc_fpstate)); mcp->mc_fpformat = fpuformat(); }