X-Git-Url: https://git.wh0rd.org/?p=ICEs.git;a=blobdiff_plain;f=388835%2Faesni-intel_glue.i;fp=388835%2Faesni-intel_glue.i;h=e5099bd9e32b7a02166b6a4bf4af23dc804fad9a;hp=0000000000000000000000000000000000000000;hb=bd3239d2bbe0de3a200b266503e3330b1e391489;hpb=dbff64cb4b7530861c2309c794efdd4e0cf47a23

diff --git a/388835/aesni-intel_glue.i b/388835/aesni-intel_glue.i
new file mode 100644
index 0000000..e5099bd
--- /dev/null
+++ b/388835/aesni-intel_glue.i
@@ -0,0 +1,32 @@
+__attribute__ ((always_inline)) __attribute__ ((pure))
+int cpu_has(unsigned short bit)
+{
+	asm goto ("1: jmp %l[t_no]\n" "2:\n" ".section .altinstructions,\"a\"\n"
+		  ".balign 4\n" ".long 1b\n" ".long 0\n" ".word %P0\n" ".byte 2b - 1b\n" ".byte 0\n"
+		  ".previous\n"::"i" (bit)::t_no);
+	return 1;
+      t_no:return 0;
+}
+
+union thread_xstate {
+	int swd;
+	int xstate_bv;
+};
+
+void aes_decrypt(union thread_xstate *state)
+{
+	if (fpu_usable()) {
+		decrypt();
+		return;
+	}
+
+	if (__builtin_constant_p(cpu_has(154)) ? cpu_has(154) : cpu_has(154)) {
+		if (state->xstate_bv)
+			return;
+	} else if (cpu_has(24)) {}
+
+	if (state->swd)
+		asm volatile ("fnclex");
+}
+
+void (*funcptr)(void) = aes_decrypt;