1 files changed, 84 insertions, 0 deletions
diff --git a/lib/greenlet/platform/switch_amd64_unix.h b/lib/greenlet/platform/switch_amd64_unix.h
new file mode 100644
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--- /dev/null
+++ b/lib/greenlet/platform/switch_amd64_unix.h
@@ -0,0 +1,84 @@
+/*
+ * this is the internal transfer function.
+ *
+ * HISTORY
+ * 3-May-13   Ralf Schmitt  <ralf@systemexit.de>
+ *     Add support for strange GCC caller-save decisions
+ *     (ported from switch_aarch64_gcc.h)
+ * 18-Aug-11  Alexey Borzenkov  <snaury@gmail.com>
+ *      Correctly save rbp, csr and cw
+ * 01-Apr-04  Hye-Shik Chang    <perky@FreeBSD.org>
+ *      Ported from i386 to amd64.
+ * 24-Nov-02  Christian Tismer  <tismer@tismer.com>
+ *      needed to add another magic constant to insure
+ *      that f in slp_eval_frame(PyFrameObject *f)
+ *      STACK_REFPLUS will probably be 1 in most cases.
+ *      gets included into the saved stack area.
+ * 17-Sep-02  Christian Tismer  <tismer@tismer.com>
+ *      after virtualizing stack save/restore, the
+ *      stack size shrunk a bit. Needed to introduce
+ *      an adjustment STACK_MAGIC per platform.
+ * 15-Sep-02  Gerd Woetzel       <gerd.woetzel@GMD.DE>
+ *      slightly changed framework for spark
+ * 31-Avr-02  Armin Rigo         <arigo@ulb.ac.be>
+ *      Added ebx, esi and edi register-saves.
+ * 01-Mar-02  Samual M. Rushing  <rushing@ironport.com>
+ *      Ported from i386.
+ */
+
+#define STACK_REFPLUS 1
+
+#ifdef SLP_EVAL
+
+/* #define STACK_MAGIC 3 */
+/* the above works fine with gcc 2.96, but 2.95.3 wants this */
+#define STACK_MAGIC 0
+
+#define REGS_TO_SAVE "r12", "r13", "r14", "r15"
+
+static int
+slp_switch(void)
+{
+    int err;
+    void* rbp;
+    void* rbx;
+    unsigned int csr;
+    unsigned short cw;
+    register long *stackref, stsizediff;
+    __asm__ volatile ("" : : : REGS_TO_SAVE);
+    __asm__ volatile ("fstcw %0" : "=m" (cw));
+    __asm__ volatile ("stmxcsr %0" : "=m" (csr));
+    __asm__ volatile ("movq %%rbp, %0" : "=m" (rbp));
+    __asm__ volatile ("movq %%rbx, %0" : "=m" (rbx));
+    __asm__ ("movq %%rsp, %0" : "=g" (stackref));
+    {
+        SLP_SAVE_STATE(stackref, stsizediff);
+        __asm__ volatile (
+            "addq %0, %%rsp\n"
+            "addq %0, %%rbp\n"
+            :
+            : "r" (stsizediff)
+            );
+        SLP_RESTORE_STATE();
+        __asm__ volatile ("xorq %%rax, %%rax" : "=a" (err));
+    }
+    __asm__ volatile ("movq %0, %%rbx" : : "m" (rbx));
+    __asm__ volatile ("movq %0, %%rbp" : : "m" (rbp));
+    __asm__ volatile ("ldmxcsr %0" : : "m" (csr));
+    __asm__ volatile ("fldcw %0" : : "m" (cw));
+    __asm__ volatile ("" : : : REGS_TO_SAVE);
+    return err;
+}
+
+#endif
+
+/*
+ * further self-processing support
+ */
+
+/* 
+ * if you want to add self-inspection tools, place them
+ * here. See the x86_msvc for the necessary defines.
+ * These features are highly experimental und not
+ * essential yet.
+ */