Preliminary FPregs for FreeBSD x86_64

Author: josteink

src/pal/src/arch/i386/context.cpp

@@ -132,6 +132,21 @@ extern void CONTEXT_CaptureContext(LPCONTEXT lpContext);
 #define MCREG_EFlags(mc)    ((mc).mc_rflags)
 #define MCREG_SegCs(mc)     ((mc).mc_cs)
 
+// #define FPREG_Xmm(uc, index) *(M128A*)&((uc)->__fpregs_mem._xmm[index])
+
+// #define FPREG_St(uc, index) *(M128A*)&((uc)->mc_fpstate[index])
+
+// from x86/fpu.h: struct __envxmm64
+#define FPREG_ControlWord(uc)   (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_cw)
+#define FPREG_StatusWord(uc)    (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_sw)
+#define FPREG_TagWord(uc)       (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_tw)
+#define FPREG_ErrorOffset(uc)   (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_rip)                 // *(DWORD*)&((uc)->__fpregs_mem.rdp)
+#define FPREG_ErrorSelector(uc) *((WORD*) &(((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_rip) + 2) // *(((WORD*)&((uc)->__fpregs_mem.rip)) + 2)
+#define FPREG_DataOffset(uc)    (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_rdp)                 // *(DWORD*)&((uc)->__fpregs_mem.rdp)
+#define FPREG_DataSelector(uc)  *((WORD*) &(((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_rdp) + 2) // *(((WORD*)&((uc)->__fpregs_mem.rdp)) + 2)
+#define FPREG_MxCsr(uc)         (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_mxcsr)
+#define FPREG_MxCsr_Mask(uc)    (((savefpu*)((uc)->uc_mcontext.mc_fpstate))->sv_env.en_mxcsr_mask)
+
 #else // BIT64
 
 #define MCREG_Ebx(mc)       ((mc).mc_ebx)