s390/test_unwind: add CALL_ON_STACK tests (7868249f) · Commits · 戴 / test

arch/s390/lib/test_unwind.c

+19 −7

Original line number	Diff line number	Diff line
		@@ -43,7 +43,7 @@ static noinline int test_unwind(struct task_struct task, struct pt_regs regs,
		int ret = 0;
		char *bt;

		bt = kmalloc(BT_BUF_SIZE, GFP_KERNEL);
		bt = kmalloc(BT_BUF_SIZE, GFP_ATOMIC);
		if (!bt) {
		pr_err("failed to allocate backtrace buffer\n");
		return -ENOMEM;
		@@ -103,6 +103,7 @@ struct unwindme {
		#define UWM_REGS 0x2 /* Pass regs to test_unwind(). */
		#define UWM_SP 0x4 /* Pass sp to test_unwind(). */
		#define UWM_CALLER 0x8 /* Unwind starting from caller. */
		#define UWM_SWITCH_STACK 0x10 /* Use CALL_ON_STACK. */

		static __always_inline unsigned long get_psw_addr(void)
		{
		@@ -146,8 +147,17 @@ static noinline int unwindme_func3(struct unwindme *u)
		/* This function must appear in the backtrace. */
		static noinline int unwindme_func2(struct unwindme *u)
		{
		int rc;

		if (u->flags & UWM_SWITCH_STACK) {
		preempt_disable();
		rc = CALL_ON_STACK(unwindme_func3, S390_lowcore.nodat_stack, 1, u);
		preempt_enable();
		return rc;
		} else {
		return unwindme_func3(u);
		}
		}

		/* This function must follow unwindme_func2 in the backtrace. */
		static noinline int unwindme_func1(void *u)
		@@ -215,9 +225,11 @@ do { \
		TEST(UWM_DEFAULT);
		TEST(UWM_SP);
		TEST(UWM_REGS);
		TEST(UWM_SWITCH_STACK);
		TEST(UWM_SP \| UWM_REGS);
		TEST(UWM_CALLER \| UWM_SP);
		TEST(UWM_CALLER \| UWM_SP \| UWM_REGS);
		TEST(UWM_CALLER \| UWM_SP \| UWM_REGS \| UWM_SWITCH_STACK);
		TEST(UWM_THREAD);
		TEST(UWM_THREAD \| UWM_SP);
		TEST(UWM_THREAD \| UWM_CALLER \| UWM_SP);