start = (void *) 0x01000000UL;
if (code_gen_buffer_size > 16 * 1024 * 1024)
code_gen_buffer_size = 16 * 1024 * 1024;
+#elif defined(__s390x__)
+ /* Map the buffer so that we can use direct calls and branches. */
+ /* We have a +- 4GB range on the branches; leave some slop. */
+ if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) {
+ code_gen_buffer_size = 3ul * 1024 * 1024 * 1024;
+ }
+ start = (void *)0x90000000UL;
#endif
code_gen_buffer = mmap(start, code_gen_buffer_size,
PROT_WRITE | PROT_READ | PROT_EXEC,