diff options
Diffstat (limited to 'lib/builtins')
-rw-r--r-- | lib/builtins/CMakeLists.txt | 6 | ||||
-rw-r--r-- | lib/builtins/aarch64/chkstk.S | 34 |
2 files changed, 40 insertions, 0 deletions
diff --git a/lib/builtins/CMakeLists.txt b/lib/builtins/CMakeLists.txt index 6fa958319..6a0faf8eb 100644 --- a/lib/builtins/CMakeLists.txt +++ b/lib/builtins/CMakeLists.txt @@ -446,6 +446,12 @@ set(aarch64_SOURCES ${GENERIC_TF_SOURCES} ${GENERIC_SOURCES}) +if (MINGW) + set(aarch64_SOURCES + ${aarch64_SOURCES} + aarch64/chkstk.S) +endif() + set(armhf_SOURCES ${arm_SOURCES}) set(armv7_SOURCES ${arm_SOURCES}) set(armv7s_SOURCES ${arm_SOURCES}) diff --git a/lib/builtins/aarch64/chkstk.S b/lib/builtins/aarch64/chkstk.S new file mode 100644 index 000000000..89ec90b08 --- /dev/null +++ b/lib/builtins/aarch64/chkstk.S @@ -0,0 +1,34 @@ +// 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__ |