| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| |
| #include "../assembly.h" |
| |
| // __chkstk routine |
| // This routine is windows specific. |
| // http://msdn.microsoft.com/en-us/library/ms648426.aspx |
| |
| // This clobbers registers x16 and x17. |
| // Does not modify any memory or the stack pointer. |
| |
| // mov x15, #256 // Number of bytes of stack, in units of 16 byte |
| // bl __chkstk |
| // sub sp, sp, x15, lsl #4 |
| |
| #ifdef __aarch64__ |
| |
| #define PAGE_SIZE 4096 |
| |
| .p2align 2 |
| DEFINE_COMPILERRT_FUNCTION(__chkstk) |
| lsl x16, x15, #4 |
| mov x17, sp |
| 1: |
| sub x17, x17, #PAGE_SIZE |
| subs x16, x16, #PAGE_SIZE |
| ldr xzr, [x17] |
| b.gt 1b |
| |
| ret |
| END_COMPILERRT_FUNCTION(__chkstk) |
| |
| #endif // __aarch64__ |
