libgcc: Added check stack overflow

Signed-off-by: Maxim Logaev <maxlogaev@proton.me>

toolchain/gcc/libgcc/config/i386/cygwin.S

@@ -1,6 +1,7 @@
-/* stuff needed for libgcc on win32.
+/* stuff needed for libgcc on win32 and KolibriOS.
  *
  *   Copyright (C) 1996-2023 Free Software Foundation, Inc.
+ *   Copyright (C) 2026 KolibriOS team.
  *   Written By Steve Chamberlain
  * 
  * This file is free software; you can redistribute it and/or modify it
@@ -25,6 +26,10 @@
 
 #include "i386-asm.h"
 
+#ifdef __KOLIBRIOS__
+#include <kolibrios/tls.h>
+#endif
+
 #ifdef HAVE_AS_CFI_SECTIONS
 	.cfi_sections	.debug_frame
 #endif
@@ -85,12 +90,16 @@ __alloca:
 	jb	2f
 
 1:	subl	$0x1000, %ecx  		/* yes, move pointer down 4k*/
+#ifdef __KOLIBRIOS__
+	cmpl %fs:KOS_TLS_OFF_LOW_STACK, %ecx /* check low stack limit */
+	jb fail
+#endif
 	orl	$0x0, (%ecx)   		/* probe there */
 	subl	$0x1000, %eax  	 	/* decrement count */
 	cmpl	$0x1000, %eax
 	ja	1b			/* and do it again */
 
-2:	subl	%eax, %ecx	   
+2:	subl	%eax, %ecx
 	orl	$0x0, (%ecx)		/* less than 4k, just peek here */
 	movl	%esp, %eax		/* save current stack pointer */
 	cfi_def_cfa_register(%eax)
@@ -149,6 +158,10 @@ ___chkstk_ms:
 	jb	2f
 
 1:	subl	$0x1000, %ecx  		/* yes, move pointer down 4k*/
+#ifdef __KOLIBRIOS__
+	cmpl %fs:KOS_TLS_OFF_LOW_STACK, %ecx /* check low stack limit */
+	jb fail
+#endif
 	orl	$0x0, (%ecx)   		/* probe there */
 	subl	$0x1000, %eax  	 	/* decrement count */
 	cmpl	$0x1000, %eax
@@ -163,5 +176,12 @@ ___chkstk_ms:
 	cfi_pop(%ecx)
 	ret
 	cfi_endproc()
+
+#ifdef __KOLIBRIOS__
+fail:
+	int3                    /* trap to debugger */
+	.asciz "Stack overflow"
+#endif
+
 #endif /* __x86_64__ */
 #endif /* L_chkstk_ms */