https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=3f6ad78936878665495a1d2d3ce13fc8481f39b2
commit 3f6ad78936878665495a1d2d3ce13fc8481f39b2
Author: Radek Bartoň <radek.bar...@microsoft.com>
AuthorDate: Thu Jun 5 13:15:22 2025 +0200
Commit: Corinna Vinschen <cori...@vinschen.de>
CommitDate: Wed Jun 25 13:44:28 2025 +0200
Cygwin: stack base initialization for AArch64
Signed-off-by: Radek Bartoň <radek.bar...@microsoft.com>
Diff:
---
winsup/cygwin/dcrt0.cc | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc
index f4c09befd62c..69c233c24759 100644
--- a/winsup/cygwin/dcrt0.cc
+++ b/winsup/cygwin/dcrt0.cc
@@ -1030,7 +1030,7 @@ _dll_crt0 ()
PVOID stackaddr = create_new_main_thread_stack (allocationbase);
if (stackaddr)
{
-#ifdef __x86_64__
+#if defined(__x86_64__)
/* Set stack pointer to new address. Set frame pointer to
stack pointer and subtract 32 bytes for shadow space. */
__asm__ ("\n\
@@ -1038,6 +1038,13 @@ _dll_crt0 ()
movq %%rsp, %%rbp \n\
subq $32,%%rsp \n"
: : [ADDR] "r" (stackaddr));
+#elif defined(__aarch64__)
+ /* Set stack and frame pointers to new address. */
+ __asm__ ("\n\
+ mov fp, %[ADDR] \n\
+ mov sp, fp \n"
+ : : [ADDR] "r" (stackaddr)
+ : "memory");
#else
#error unimplemented for this target
#endif
