80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
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#include "../multiarch/noexec.c.inc"
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static void *arch_mcontext_pc(const mcontext_t *ctx)
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{
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return (void *)ctx->__gregs[REG_PC];
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}
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static int arch_mcontext_arg(const mcontext_t *ctx)
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{
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return ctx->__gregs[REG_A0];
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}
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static void arch_flush(void *p, int len)
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{
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__builtin___clear_cache(p, p + len);
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}
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extern char noexec_1[];
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extern char noexec_2[];
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extern char noexec_end[];
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asm(".option push\n"
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".option norvc\n"
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"noexec_1:\n"
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" li a0,1\n" /* a0 is 0 on entry, set 1. */
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"noexec_2:\n"
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" li a0,2\n" /* a0 is 0/1; set 2. */
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" ret\n"
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"noexec_end:\n"
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".option pop");
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int main(void)
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{
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struct noexec_test noexec_tests[] = {
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{
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.name = "fallthrough",
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.test_code = noexec_1,
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.test_len = noexec_end - noexec_1,
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.page_ofs = noexec_1 - noexec_2,
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.entry_ofs = noexec_1 - noexec_2,
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.expected_si_ofs = 0,
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.expected_pc_ofs = 0,
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.expected_arg = 1,
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},
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{
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.name = "jump",
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.test_code = noexec_1,
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.test_len = noexec_end - noexec_1,
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.page_ofs = noexec_1 - noexec_2,
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.entry_ofs = 0,
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.expected_si_ofs = 0,
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.expected_pc_ofs = 0,
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.expected_arg = 0,
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},
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{
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.name = "fallthrough [cross]",
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.test_code = noexec_1,
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.test_len = noexec_end - noexec_1,
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.page_ofs = noexec_1 - noexec_2 - 2,
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.entry_ofs = noexec_1 - noexec_2 - 2,
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.expected_si_ofs = 0,
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.expected_pc_ofs = -2,
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.expected_arg = 1,
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},
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{
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.name = "jump [cross]",
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.test_code = noexec_1,
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.test_len = noexec_end - noexec_1,
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.page_ofs = noexec_1 - noexec_2 - 2,
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.entry_ofs = -2,
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.expected_si_ofs = 0,
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.expected_pc_ofs = -2,
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.expected_arg = 0,
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},
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};
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return test_noexec(noexec_tests,
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sizeof(noexec_tests) / sizeof(noexec_tests[0]));
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}
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