diff -Naur heirloom-sh-050706/fault.c heirloom-sh-050706-patched/fault.c
--- heirloom-sh-050706/fault.c	2025-02-03 21:42:16.617468309 +0300
+++ heirloom-sh-050706-patched/fault.c	2025-02-03 22:36:35.184395692 +0300
@@ -43,7 +43,7 @@
 #include	<string.h>
 
 static	void (*psig0_func)(int) = SIG_ERR;	/* previous signal handler for signal 0 */
-static	char sigsegv_stack[SIGSTKSZ];
+char *sigsegv_stack;
 
 static BOOL sleeping = 0;
 static unsigned char *trapcom[MAXTRAP]; /* array of actions, one per signal */
@@ -288,6 +288,7 @@
 	int rtmax = -1;
 #endif
 
+	sigsegv_stack = sbrk(SIGSTKSZ);
 	ss.ss_size = SIGSTKSZ;
 	ss.ss_sp = sigsegv_stack;
 	ss.ss_flags = 0;