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tests/tcg/s390x: Test EXECUTE of relative branches
Add a small test to prevent regressions. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230426235813.198183-3-iii@linux.ibm.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* Check EXECUTE with relative branch instructions as targets. */ | ||
| #include <assert.h> | ||
| #include <stdbool.h> | ||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
|
|
||
| struct test { | ||
| const char *name; | ||
| void (*func)(long *link, long *magic); | ||
| long exp_link; | ||
| }; | ||
|
|
||
| /* Branch instructions and their expected effects. */ | ||
| #define LINK_64(test) ((long)test ## _exp_link) | ||
| #define LINK_NONE(test) -1L | ||
| #define FOR_EACH_INSN(F) \ | ||
| F(bras, "%[link]", LINK_64) \ | ||
| F(brasl, "%[link]", LINK_64) \ | ||
| F(brc, "0x8", LINK_NONE) \ | ||
| F(brcl, "0x8", LINK_NONE) \ | ||
| F(brct, "%%r0", LINK_NONE) \ | ||
| F(brctg, "%%r0", LINK_NONE) \ | ||
| F(brxh, "%%r2,%%r0", LINK_NONE) \ | ||
| F(brxhg, "%%r2,%%r0", LINK_NONE) \ | ||
| F(brxle, "%%r0,%%r1", LINK_NONE) \ | ||
| F(brxlg, "%%r0,%%r1", LINK_NONE) \ | ||
| F(crj, "%%r0,%%r0,8", LINK_NONE) \ | ||
| F(cgrj, "%%r0,%%r0,8", LINK_NONE) \ | ||
| F(cij, "%%r0,0,8", LINK_NONE) \ | ||
| F(cgij, "%%r0,0,8", LINK_NONE) \ | ||
| F(clrj, "%%r0,%%r0,8", LINK_NONE) \ | ||
| F(clgrj, "%%r0,%%r0,8", LINK_NONE) \ | ||
| F(clij, "%%r0,0,8", LINK_NONE) \ | ||
| F(clgij, "%%r0,0,8", LINK_NONE) | ||
|
|
||
| #define INIT_TEST \ | ||
| "xgr %%r0,%%r0\n" /* %r0 = 0; %cc = 0 */ \ | ||
| "lghi %%r1,1\n" /* %r1 = 1 */ \ | ||
| "lghi %%r2,2\n" /* %r2 = 2 */ | ||
|
|
||
| #define CLOBBERS_TEST "cc", "0", "1", "2" | ||
|
|
||
| #define DEFINE_TEST(insn, args, exp_link) \ | ||
| extern char insn ## _exp_link[]; \ | ||
| static void test_ ## insn(long *link, long *magic) \ | ||
| { \ | ||
| asm(INIT_TEST \ | ||
| #insn " " args ",0f\n" \ | ||
| ".globl " #insn "_exp_link\n" \ | ||
| #insn "_exp_link:\n" \ | ||
| ".org . + 90\n" \ | ||
| "0: lgfi %[magic],0x12345678\n" \ | ||
| : [link] "+r" (*link) \ | ||
| , [magic] "+r" (*magic) \ | ||
| : : CLOBBERS_TEST); \ | ||
| } \ | ||
| extern char ex_ ## insn ## _exp_link[]; \ | ||
| static void test_ex_ ## insn(long *link, long *magic) \ | ||
| { \ | ||
| unsigned long target; \ | ||
| \ | ||
| asm(INIT_TEST \ | ||
| "larl %[target],0f\n" \ | ||
| "ex %%r0,0(%[target])\n" \ | ||
| ".globl ex_" #insn "_exp_link\n" \ | ||
| "ex_" #insn "_exp_link:\n" \ | ||
| ".org . + 60\n" \ | ||
| "0: " #insn " " args ",1f\n" \ | ||
| ".org . + 120\n" \ | ||
| "1: lgfi %[magic],0x12345678\n" \ | ||
| : [target] "=r" (target) \ | ||
| , [link] "+r" (*link) \ | ||
| , [magic] "+r" (*magic) \ | ||
| : : CLOBBERS_TEST); \ | ||
| } \ | ||
| extern char exrl_ ## insn ## _exp_link[]; \ | ||
| static void test_exrl_ ## insn(long *link, long *magic) \ | ||
| { \ | ||
| asm(INIT_TEST \ | ||
| "exrl %%r0,0f\n" \ | ||
| ".globl exrl_" #insn "_exp_link\n" \ | ||
| "exrl_" #insn "_exp_link:\n" \ | ||
| ".org . + 60\n" \ | ||
| "0: " #insn " " args ",1f\n" \ | ||
| ".org . + 120\n" \ | ||
| "1: lgfi %[magic],0x12345678\n" \ | ||
| : [link] "+r" (*link) \ | ||
| , [magic] "+r" (*magic) \ | ||
| : : CLOBBERS_TEST); \ | ||
| } | ||
|
|
||
| /* Test functions. */ | ||
| FOR_EACH_INSN(DEFINE_TEST) | ||
|
|
||
| /* Test definitions. */ | ||
| #define REGISTER_TEST(insn, args, _exp_link) \ | ||
| { \ | ||
| .name = #insn, \ | ||
| .func = test_ ## insn, \ | ||
| .exp_link = (_exp_link(insn)), \ | ||
| }, \ | ||
| { \ | ||
| .name = "ex " #insn, \ | ||
| .func = test_ex_ ## insn, \ | ||
| .exp_link = (_exp_link(ex_ ## insn)), \ | ||
| }, \ | ||
| { \ | ||
| .name = "exrl " #insn, \ | ||
| .func = test_exrl_ ## insn, \ | ||
| .exp_link = (_exp_link(exrl_ ## insn)), \ | ||
| }, | ||
|
|
||
| static const struct test tests[] = { | ||
| FOR_EACH_INSN(REGISTER_TEST) | ||
| }; | ||
|
|
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| int main(int argc, char **argv) | ||
| { | ||
| const struct test *test; | ||
| int ret = EXIT_SUCCESS; | ||
| bool verbose = false; | ||
| long link, magic; | ||
| size_t i; | ||
|
|
||
| for (i = 1; i < argc; i++) { | ||
| if (strcmp(argv[i], "-v") == 0) { | ||
| verbose = true; | ||
| } | ||
| } | ||
|
|
||
| for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) { | ||
| test = &tests[i]; | ||
| if (verbose) { | ||
| fprintf(stderr, "[ RUN ] %s\n", test->name); | ||
| } | ||
| link = -1; | ||
| magic = -1; | ||
| test->func(&link, &magic); | ||
| #define ASSERT_EQ(expected, actual) do { \ | ||
| if (expected != actual) { \ | ||
| fprintf(stderr, "%s: " #expected " (0x%lx) != " #actual " (0x%lx)\n", \ | ||
| test->name, expected, actual); \ | ||
| ret = EXIT_FAILURE; \ | ||
| } \ | ||
| } while (0) | ||
| ASSERT_EQ(test->exp_link, link); | ||
| ASSERT_EQ(0x12345678L, magic); | ||
| #undef ASSERT_EQ | ||
| } | ||
|
|
||
| if (verbose) { | ||
| fprintf(stderr, ret == EXIT_SUCCESS ? "[ PASSED ]\n" : | ||
| "[ FAILED ]\n"); | ||
| } | ||
|
|
||
| return ret; | ||
| } |