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Sat, 12 Mar 2022 09:25:46 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3F93042045; Sat, 12 Mar 2022 09:25:46 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D06DA4203F; Sat, 12 Mar 2022 09:25:45 +0000 (GMT) Received: from heavy.lan (unknown [9.171.29.97]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sat, 12 Mar 2022 09:25:45 +0000 (GMT) From: Ilya Leoshkevich To: Richard Henderson , David Hildenbrand , Cornelia Huck , Thomas Huth Subject: [PATCH v2 3/3] tests/tcg/s390x: Test BRASL and BRCL with large negative offsets Date: Sat, 12 Mar 2022 10:25:41 +0100 Message-Id: <20220312092541.585282-4-iii@linux.ibm.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220312092541.585282-1-iii@linux.ibm.com> References: <20220312092541.585282-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 1mbpldh854xoPBeS2AJGs0xPmS4T1d6b X-Proofpoint-GUID: IR_MWrB6Uxx_WcwI-WJ1fNiFv-DZx96F X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-12_03,2022-03-11_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 mlxscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 bulkscore=0 malwarescore=0 clxscore=1015 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2203120053 Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christian Borntraeger , qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Ilya Leoshkevich Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add a small test in order to prevent regressions. Signed-off-by: Ilya Leoshkevich Reviewed-by: Richard Henderson Reviewed-by: David Hildenbrand --- tests/tcg/s390x/Makefile.target | 1 + tests/tcg/s390x/branch-relative-long.c | 60 ++++++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 tests/tcg/s390x/branch-relative-long.c diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target index 257c568c58..fd34b130f7 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -15,6 +15,7 @@ TESTS+=mvc TESTS+=shift TESTS+=trap TESTS+=signals-s390x +TESTS+=branch-relative-long ifneq ($(HAVE_GDB_BIN),) GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py diff --git a/tests/tcg/s390x/branch-relative-long.c b/tests/tcg/s390x/branch-relative-long.c new file mode 100644 index 0000000000..c6f3f2db6d --- /dev/null +++ b/tests/tcg/s390x/branch-relative-long.c @@ -0,0 +1,60 @@ +#include +#include +#include +#include + +#define DEFINE_ASM(_name, _code) \ + extern const char _name[]; \ + extern const char _name ## _end[]; \ + asm(" .globl " #_name "\n" \ + #_name ":\n" \ + " " _code "\n" \ + " .globl " #_name "_end\n" \ + #_name "_end:\n"); + +DEFINE_ASM(br_r14, "br %r14"); +DEFINE_ASM(brasl_r0, "brasl %r0,.-0x100000000"); +DEFINE_ASM(brcl_0xf, "brcl 0xf,.-0x100000000"); + +struct test { + const char *code; + const char *code_end; +}; + +static const struct test tests[] = { + { + .code = brasl_r0, + .code_end = brasl_r0_end, + }, + { + .code = brcl_0xf, + .code_end = brcl_0xf_end, + }, +}; + +int main(void) +{ + size_t length = 0x100000006; + unsigned char *buf; + void (*code)(void); + size_t i; + + buf = mmap(NULL, length, PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (buf == MAP_FAILED) { + perror("SKIP: mmap() failed"); + return 0; + } + + memcpy(buf, br_r14, br_r14_end - br_r14); + for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) { + code = (void *)(buf + 0x100000000); + memcpy(code, tests[i].code, tests[i].code_end - tests[i].code); + code(); + memset(code, 0, tests[i].code_end - tests[i].code); + } + + munmap(buf, length); + + return 0; +}