42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
#include <ucontext.h>
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#include <machine/npx.h>
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namespace factor
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{
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inline static void *ucontext_stack_pointer(void *uap)
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{
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ucontext_t *ucontext = (ucontext_t *)uap;
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return (void *)ucontext->uc_mcontext.mc_esp;
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}
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inline static unsigned int uap_fpu_status(void *uap)
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{
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ucontext_t *ucontext = (ucontext_t *)uap;
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if (ucontext->uc_mcontext.mc_fpformat == _MC_FPFMT_387) {
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struct save87 *x87 = (struct save87 *)(&ucontext->uc_mcontext.mc_fpstate);
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return x87->sv_env.en_sw;
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} else if (ucontext->uc_mcontext.mc_fpformat == _MC_FPFMT_XMM) {
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struct savexmm *xmm = (struct savexmm *)(&ucontext->uc_mcontext.mc_fpstate);
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return xmm->sv_env.en_sw | xmm->sv_env.en_mxcsr;
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} else
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return 0;
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}
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inline static void uap_clear_fpu_status(void *uap)
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{
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ucontext_t *ucontext = (ucontext_t *)uap;
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if (uap->uc_mcontext.mc_fpformat == _MC_FPFMT_387) {
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struct save87 *x87 = (struct save87 *)(&ucontext->uc_mcontext.mc_fpstate);
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x87->sv_env.en_sw = 0;
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} else if (uap->uc_mcontext.mc_fpformat == _MC_FPFMT_XMM) {
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struct savexmm *xmm = (struct savexmm *)(&ucontext->uc_mcontext.mc_fpstate);
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xmm->sv_env.en_sw = 0;
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xmm->sv_env.en_mxcsr &= 0xffffffc0;
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}
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}
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#define UAP_PROGRAM_COUNTER(ucontext) (((ucontext_t *)(ucontext))->uc_mcontext.mc_eip)
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}
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