| 1 | #include "../multiarch/noexec.c.inc" |
| 2 | |
| 3 | static void *arch_mcontext_pc(const mcontext_t *ctx) |
| 4 | { |
| 5 | return (void *)ctx->psw.addr; |
| 6 | } |
| 7 | |
| 8 | static int arch_mcontext_arg(const mcontext_t *ctx) |
| 9 | { |
| 10 | return ctx->gregs[2]; |
| 11 | } |
| 12 | |
| 13 | static void arch_flush(void *p, int len) |
| 14 | { |
| 15 | } |
| 16 | |
| 17 | extern char noexec_1[]; |
| 18 | extern char noexec_2[]; |
| 19 | extern char noexec_end[]; |
| 20 | |
| 21 | asm("noexec_1:\n" |
| 22 | " lgfi %r2,1\n" /* %r2 is 0 on entry, set 1. */ |
| 23 | "noexec_2:\n" |
| 24 | " lgfi %r2,2\n" /* %r2 is 0/1; set 2. */ |
| 25 | " br %r14\n" /* return */ |
| 26 | "noexec_end:"); |
| 27 | |
| 28 | extern char exrl_1[]; |
| 29 | extern char exrl_2[]; |
| 30 | extern char exrl_end[]; |
| 31 | |
| 32 | asm("exrl_1:\n" |
| 33 | " exrl %r0, exrl_2\n" |
| 34 | " br %r14\n" |
| 35 | "exrl_2:\n" |
| 36 | " lgfi %r2,2\n" |
| 37 | "exrl_end:"); |
| 38 | |
| 39 | int main(void) |
| 40 | { |
| 41 | struct noexec_test noexec_tests[] = { |
| 42 | { |
| 43 | .name = "fallthrough", |
| 44 | .test_code = noexec_1, |
| 45 | .test_len = noexec_end - noexec_1, |
| 46 | .page_ofs = noexec_1 - noexec_2, |
| 47 | .entry_ofs = noexec_1 - noexec_2, |
| 48 | .expected_si_ofs = 0, |
| 49 | .expected_pc_ofs = 0, |
| 50 | .expected_arg = 1, |
| 51 | }, |
| 52 | { |
| 53 | .name = "jump", |
| 54 | .test_code = noexec_1, |
| 55 | .test_len = noexec_end - noexec_1, |
| 56 | .page_ofs = noexec_1 - noexec_2, |
| 57 | .entry_ofs = 0, |
| 58 | .expected_si_ofs = 0, |
| 59 | .expected_pc_ofs = 0, |
| 60 | .expected_arg = 0, |
| 61 | }, |
| 62 | { |
| 63 | .name = "exrl", |
| 64 | .test_code = exrl_1, |
| 65 | .test_len = exrl_end - exrl_1, |
| 66 | .page_ofs = exrl_1 - exrl_2, |
| 67 | .entry_ofs = exrl_1 - exrl_2, |
| 68 | .expected_si_ofs = 0, |
| 69 | .expected_pc_ofs = exrl_1 - exrl_2, |
| 70 | .expected_arg = 0, |
| 71 | }, |
| 72 | { |
| 73 | .name = "fallthrough [cross]", |
| 74 | .test_code = noexec_1, |
| 75 | .test_len = noexec_end - noexec_1, |
| 76 | .page_ofs = noexec_1 - noexec_2 - 2, |
| 77 | .entry_ofs = noexec_1 - noexec_2 - 2, |
| 78 | .expected_si_ofs = 0, |
| 79 | .expected_pc_ofs = -2, |
| 80 | .expected_arg = 1, |
| 81 | }, |
| 82 | { |
| 83 | .name = "jump [cross]", |
| 84 | .test_code = noexec_1, |
| 85 | .test_len = noexec_end - noexec_1, |
| 86 | .page_ofs = noexec_1 - noexec_2 - 2, |
| 87 | .entry_ofs = -2, |
| 88 | .expected_si_ofs = 0, |
| 89 | .expected_pc_ofs = -2, |
| 90 | .expected_arg = 0, |
| 91 | }, |
| 92 | { |
| 93 | .name = "exrl [cross]", |
| 94 | .test_code = exrl_1, |
| 95 | .test_len = exrl_end - exrl_1, |
| 96 | .page_ofs = exrl_1 - exrl_2 - 2, |
| 97 | .entry_ofs = exrl_1 - exrl_2 - 2, |
| 98 | .expected_si_ofs = 0, |
| 99 | .expected_pc_ofs = exrl_1 - exrl_2 - 2, |
| 100 | .expected_arg = 0, |
| 101 | }, |
| 102 | }; |
| 103 | |
| 104 | return test_noexec(noexec_tests, |
| 105 | sizeof(noexec_tests) / sizeof(noexec_tests[0])); |
| 106 | } |