ab12c95d3f
Right now translator stops right *after* the end of a page, which breaks reporting of fault locations when the last instruction of a multi-insn translation block crosses a page boundary. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220817150506.592862-3-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
#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->psw.addr;
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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[2];
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}
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static void arch_flush(void *p, int len)
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{
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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("noexec_1:\n"
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" lgfi %r2,1\n" /* %r2 is 0 on entry, set 1. */
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"noexec_2:\n"
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" lgfi %r2,2\n" /* %r2 is 0/1; set 2. */
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" br %r14\n" /* return */
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"noexec_end:");
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extern char exrl_1[];
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extern char exrl_2[];
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extern char exrl_end[];
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asm("exrl_1:\n"
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" exrl %r0, exrl_2\n"
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" br %r14\n"
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"exrl_2:\n"
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" lgfi %r2,2\n"
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"exrl_end:");
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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 = "exrl",
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.test_code = exrl_1,
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.test_len = exrl_end - exrl_1,
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.page_ofs = exrl_1 - exrl_2,
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.entry_ofs = exrl_1 - exrl_2,
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.expected_si_ofs = 0,
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.expected_pc_ofs = exrl_1 - exrl_2,
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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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.name = "exrl [cross]",
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.test_code = exrl_1,
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.test_len = exrl_end - exrl_1,
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.page_ofs = exrl_1 - exrl_2 - 2,
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.entry_ofs = exrl_1 - exrl_2 - 2,
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.expected_si_ofs = 0,
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.expected_pc_ofs = exrl_1 - exrl_2 - 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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