Rename backtrace.c to stack.c and move stack related bits

 ... from util.c to stack.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 81 deletions

diff --git a/core/utils.c b/core/utils.c
index 1b1a8bf..63046fc 100644
--- a/core/utils.c
+++ b/core/utils.c
@@ -68,84 +68,3 @@ char __attrconst tohex(uint8_t nibble)
 	return __tohex[nibble];
 }
 
-void __noreturn __nomcount __stack_chk_fail(void);
-void __noreturn __nomcount __stack_chk_fail(void)
-{
-	prlog(PR_EMERG, "Stack corruption detected !\n");
-	abort();
-}
-
-#ifdef STACK_CHECK_ENABLED
-
-void __nomcount __mcount_stack_check(uint64_t sp, uint64_t lr);
-void __nomcount __mcount_stack_check(uint64_t sp, uint64_t lr)
-{
-	struct cpu_thread *c = this_cpu();
-	uint64_t base = (uint64_t)c;
-	uint64_t bot = base + sizeof(struct cpu_thread);
-	int64_t mark = sp - bot;
-	uint64_t top = base + NORMAL_STACK_SIZE;
-
-	/*
-	 * Don't re-enter on this CPU or don't enter at all if somebody
-	 * has spotted an overflow
-	 */
-	if (c->in_mcount)
-		return;
-	c->in_mcount = true;
-
-	/* Capture lowest stack for this thread */
-	if (mark < c->stack_bot_mark) {
-		c->stack_bot_mark = mark;
-		c->stack_bot_pc = lr;
-		c->stack_bot_tok = c->current_token;
-	}
-
-	/* Stack is within bounds ? check for warning and bail */
-	if (sp >= (bot + STACK_SAFETY_GAP) && sp < top) {
-		if (mark < STACK_WARNING_GAP) {
-			prlog(PR_EMERG, "CPU %04x Stack usage danger !"
-			      " pc=%08llx sp=%08llx (gap=%lld) token=%lld\n",
-			      c->pir, lr, sp, mark, c->current_token);
-			backtrace();
-		}
-		c->in_mcount = false;
-		return;
-	}
-	
-	prlog(PR_EMERG, "CPU %04x Stack overflow detected !"
-	      " pc=%08llx sp=%08llx (gap=%lld) token=%lld\n",
-	      c->pir, lr, sp, mark, c->current_token);
-	abort();
-}
-
-static int64_t lowest_stack_mark = LONG_MAX;
-static struct lock stack_check_lock = LOCK_UNLOCKED;
-
-void check_stacks(void)
-{
-	struct cpu_thread *c;
-	uint64_t lmark, lpc, ltok;
-	int found = -1;
-
-	for_each_cpu(c) {
-		if (!c->stack_bot_mark ||
-		    c->stack_bot_mark >= lowest_stack_mark)
-			continue;
-		lock(&stack_check_lock);
-		if (c->stack_bot_mark >= lowest_stack_mark) {
-			unlock(&stack_check_lock);
-			continue;
-		}
-		lmark = lowest_stack_mark = c->stack_bot_mark;
-		lpc = c->stack_bot_pc;
-		ltok = c->stack_bot_tok;
-		found = c->pir;
-		unlock(&stack_check_lock);
-	}
-	if (found >= 0)
-		prlog(PR_NOTICE, "CPU %04x lowest stack mark %lld bytes left"
-		      " pc=%08llx token=%lld\n", found, lmark, lpc, ltok);
-}
-
-#endif /* STACK_CHECK_ENABLED */