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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727873563; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3751MXMOy3sONsBUCbkpnnVF+sSrHF6QSWD7o0QUuic=; b=M6PFCPZ7g/U9DMn//Yu2MZYj9Cm3JDWj67bClve6BGUeCm4Se1J7z8SPz44Htw9bgqcBKe NRdmwML9otHYr18DP7nGrXTa+ywPh6+RH8J+MJudlKYQtId8LUduJ3FMy1zyXZM44THIQu 8O3D+xeoscRL64+iG7zZGCqwUQaYVq4= X-MC-Unique: 9r0IXqyGMCKzmte0NZkqIQ-1 From: Thomas Huth To: qemu-devel@nongnu.org Cc: Peter Maydell Subject: [PULL 5/5] tests/tcg/s390x: Test modifying an EXECUTE target Date: Wed, 2 Oct 2024 14:52:26 +0200 Message-ID: <20241002125226.282193-6-thuth@redhat.com> In-Reply-To: <20241002125226.282193-1-thuth@redhat.com> References: <20241002125226.282193-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Ilya Leoshkevich QEMU correctly implements the tracking of EXECUTE target modifications by storing the instruction text in env->ex_value and tb->cs_base, the latter of which is used for lookups. Still, EXECUTE is a tricky corner of the s390x emulation, which can benefit from having a regression test. Signed-off-by: Ilya Leoshkevich Message-ID: <20241001145634.9786-1-iii@linux.ibm.com> Signed-off-by: Thomas Huth --- tests/tcg/s390x/ex-smc.c | 57 +++++++++++++++++++++++++++++++++ tests/tcg/s390x/Makefile.target | 1 + 2 files changed, 58 insertions(+) create mode 100644 tests/tcg/s390x/ex-smc.c diff --git a/tests/tcg/s390x/ex-smc.c b/tests/tcg/s390x/ex-smc.c new file mode 100644 index 0000000000..f403640d6b --- /dev/null +++ b/tests/tcg/s390x/ex-smc.c @@ -0,0 +1,57 @@ +/* + * Test modifying an EXECUTE target. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include +#include + +/* Make sure we exercise the same EXECUTE instruction. */ +extern void execute(unsigned char *insn, unsigned char mask, + unsigned long *r1_r5); +asm(".globl execute\n" + "execute:\n" + "lg %r1,0(%r4)\n" + "lg %r5,8(%r4)\n" + "ex %r3,0(%r2)\n" + "stg %r5,8(%r4)\n" + "stg %r1,0(%r4)\n" + "br %r14\n"); + +/* Define an RWX EXECUTE target. */ +extern unsigned char lgfi[]; +asm(".pushsection .rwx,\"awx\",@progbits\n" + ".globl lgfi\n" + "lgfi: lgfi %r0,0\n" + ".popsection\n"); + +int main(void) +{ + unsigned long r1_r5[2]; + + /* Create an initial TB. */ + r1_r5[0] =3D -1; + r1_r5[1] =3D -1; + execute(lgfi, 1 << 4, r1_r5); + assert(r1_r5[0] =3D=3D 0); + assert(r1_r5[1] =3D=3D -1); + + /* Test changing the mask. */ + execute(lgfi, 5 << 4, r1_r5); + assert(r1_r5[0] =3D=3D 0); + assert(r1_r5[1] =3D=3D 0); + + /* Test changing the target. */ + lgfi[5] =3D 42; + execute(lgfi, 5 << 4, r1_r5); + assert(r1_r5[0] =3D=3D 0); + assert(r1_r5[1] =3D=3D 42); + + /* Test changing both the mask and the target. */ + lgfi[5] =3D 24; + execute(lgfi, 1 << 4, r1_r5); + assert(r1_r5[0] =3D=3D 24); + assert(r1_r5[1] =3D=3D 42); + + return EXIT_SUCCESS; +} diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.tar= get index a8f86c9449..2dab4f4582 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -48,6 +48,7 @@ TESTS+=3Dlae TESTS+=3Dcvd TESTS+=3Dcvb TESTS+=3Dts +TESTS+=3Dex-smc =20 cdsg: CFLAGS+=3D-pthread cdsg: LDFLAGS+=3D-pthread --=20 2.46.1