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#include "../multiarch/noexec.c.inc"
static void *arch_mcontext_pc(const mcontext_t *ctx)
{
return (void *)ctx->psw.addr;
}
static int arch_mcontext_arg(const mcontext_t *ctx)
{
return ctx->gregs[2];
}
static void arch_flush(void *p, int len)
{
}
extern char noexec_1[];
extern char noexec_2[];
extern char noexec_end[];
asm("noexec_1:\n"
" lgfi %r2,1\n" /* %r2 is 0 on entry, set 1. */
"noexec_2:\n"
" lgfi %r2,2\n" /* %r2 is 0/1; set 2. */
" br %r14\n" /* return */
"noexec_end:");
extern char exrl_1[];
extern char exrl_2[];
extern char exrl_end[];
asm("exrl_1:\n"
" exrl %r0, exrl_2\n"
" br %r14\n"
"exrl_2:\n"
" lgfi %r2,2\n"
"exrl_end:");
int main(void)
{
struct noexec_test noexec_tests[] = {
{
.name = "fallthrough",
.test_code = noexec_1,
.test_len = noexec_end - noexec_1,
.page_ofs = noexec_1 - noexec_2,
.entry_ofs = noexec_1 - noexec_2,
.expected_si_ofs = 0,
.expected_pc_ofs = 0,
.expected_arg = 1,
},
{
.name = "jump",
.test_code = noexec_1,
.test_len = noexec_end - noexec_1,
.page_ofs = noexec_1 - noexec_2,
.entry_ofs = 0,
.expected_si_ofs = 0,
.expected_pc_ofs = 0,
.expected_arg = 0,
},
{
.name = "exrl",
.test_code = exrl_1,
.test_len = exrl_end - exrl_1,
.page_ofs = exrl_1 - exrl_2,
.entry_ofs = exrl_1 - exrl_2,
.expected_si_ofs = 0,
.expected_pc_ofs = exrl_1 - exrl_2,
.expected_arg = 0,
},
{
.name = "fallthrough [cross]",
.test_code = noexec_1,
.test_len = noexec_end - noexec_1,
.page_ofs = noexec_1 - noexec_2 - 2,
.entry_ofs = noexec_1 - noexec_2 - 2,
.expected_si_ofs = 0,
.expected_pc_ofs = -2,
.expected_arg = 1,
},
{
.name = "jump [cross]",
.test_code = noexec_1,
.test_len = noexec_end - noexec_1,
.page_ofs = noexec_1 - noexec_2 - 2,
.entry_ofs = -2,
.expected_si_ofs = 0,
.expected_pc_ofs = -2,
.expected_arg = 0,
},
{
.name = "exrl [cross]",
.test_code = exrl_1,
.test_len = exrl_end - exrl_1,
.page_ofs = exrl_1 - exrl_2 - 2,
.entry_ofs = exrl_1 - exrl_2 - 2,
.expected_si_ofs = 0,
.expected_pc_ofs = exrl_1 - exrl_2 - 2,
.expected_arg = 0,
},
};
return test_noexec(noexec_tests,
sizeof(noexec_tests) / sizeof(noexec_tests[0]));
}
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