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// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: Copyright (C) 2003 Hewlett-Packard
/*
* Code contributed by David Mosberger-Tang <davidm@hpl.hp.com>
* to libunwind - a platform-independent unwind library
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <common.h>
#include <bselftest.h>
#include <string.h>
#include <asm/setjmp.h>
BSELFTEST_GLOBALS();
static __noreturn void raise_longjmp(jmp_buf jbuf, int i, int n)
{
while (i < n)
raise_longjmp(jbuf, i + 1, n);
longjmp(jbuf, n);
}
static jmp_buf jbuf;
static void __noreturn initjmp_entry(void)
{
volatile u32 arr[256];
int i;
for (i = 0; i < ARRAY_SIZE(arr); i++)
writel(i, &arr[i]);
/* ensure arr[] is allocated on stack */
OPTIMIZER_HIDE_VAR(i);
if (i == 0)
initjmp_entry();
longjmp(jbuf, 0x1337);
}
static void test_setjmp(void)
{
void *stack;
jmp_buf ijbuf;
volatile int i;
int ret;
total_tests += 20;
for (i = 0; i < 10; ++i) {
if ((ret = setjmp(jbuf))) {
pr_debug("%s: secondary setjmp() return, ret=%d\n",
__func__, ret);
if (ret != i + 1) {
printf("%s: setjmp() returned %d, expected %d\n",
__func__, ret, i + 1);
failed_tests += 2;
}
continue;
}
pr_debug("%s.%d: done with setjmp(); calling children\n",
__func__, i + 1);
raise_longjmp(jbuf, 0, i + 1);
printf("%s: raise_longjmp() returned unexpectedly\n", __func__);
failed_tests++;
}
stack = memalign(16, CONFIG_STACK_SIZE);
if (WARN_ON(!stack)) {
skipped_tests++;
return;
}
pr_debug("%s: testing initjmp\n", __func__);
total_tests += 1;
/* initialize new context with fresh stack */
initjmp(ijbuf, initjmp_entry, stack + CONFIG_STACK_SIZE);
switch (setjmp(jbuf)) {
case 0x1337:
break;
case 0:
longjmp(ijbuf, 0x42);
default:
failed_tests++;
}
free(stack);
}
bselftest(core, test_setjmp);
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