mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-29 14:33:08 +00:00
f709a0b6f9
Provide a unit test for the longjmp() library function Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Acked-by: Sean Anderson <seanga2@gmail.com>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Test setjmp(), longjmp()
|
|
*
|
|
* Copyright (c) 2021, Heinrich Schuchardt <xypron.glpk@gmx.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <test/lib.h>
|
|
#include <test/test.h>
|
|
#include <test/ut.h>
|
|
#include <asm/setjmp.h>
|
|
|
|
struct test_jmp_buf {
|
|
jmp_buf env;
|
|
int val;
|
|
};
|
|
|
|
/**
|
|
* test_longjmp() - test longjmp function
|
|
*
|
|
* @i is passed to longjmp.
|
|
* @i << 8 is set in the environment structure.
|
|
*
|
|
* @env: environment
|
|
* @i: value passed to longjmp()
|
|
*/
|
|
static noinline void test_longjmp(struct test_jmp_buf *env, int i)
|
|
{
|
|
env->val = i << 8;
|
|
longjmp(env->env, i);
|
|
}
|
|
|
|
/**
|
|
* test_setjmp() - test setjmp function
|
|
*
|
|
* setjmp() will return the value @i passed to longjmp() if @i is non-zero.
|
|
* For @i == 0 we expect return value 1.
|
|
*
|
|
* @i << 8 will be set by test_longjmp in the environment structure.
|
|
* This value can be used to check that the stack frame is restored.
|
|
*
|
|
* We return the XORed values to allow simply check both at once.
|
|
*
|
|
* @i: value passed to longjmp()
|
|
* Return: values return by longjmp()
|
|
*/
|
|
static int test_setjmp(int i)
|
|
{
|
|
struct test_jmp_buf env;
|
|
int ret;
|
|
|
|
env.val = -1;
|
|
ret = setjmp(env.env);
|
|
if (ret)
|
|
return ret ^ env.val;
|
|
test_longjmp(&env, i);
|
|
/* We should not arrive here */
|
|
return 0x1000;
|
|
}
|
|
|
|
static int lib_test_longjmp(struct unit_test_state *uts)
|
|
{
|
|
int i;
|
|
|
|
for (i = -3; i < 0; ++i)
|
|
ut_asserteq(i ^ (i << 8), test_setjmp(i));
|
|
ut_asserteq(1, test_setjmp(0));
|
|
for (i = 1; i < 4; ++i)
|
|
ut_asserteq(i ^ (i << 8), test_setjmp(i));
|
|
return 0;
|
|
}
|
|
LIB_TEST(lib_test_longjmp, 0);
|