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dkim=pass reason="pass (just generated, assumed good)" header.d=opensource.wdc.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d= opensource.wdc.com; h=content-transfer-encoding:content-type :mime-version:references:in-reply-to:x-mailer:message-id:date :subject:to:from; s=dkim; t=1671416294; x=1674008295; bh=Jzu4w1v 0TJpnBmXkZe8wqb1VN0yzrvZdJQ4Z2Lx9Dzs=; b=K4mvxcppjCK9Yl0hs/emQ5C qZo3AZAd4h7CtafXVRroqhKHLcHG+Cgqt6X47SsALGhKyl8TMEH++XaWLPH3BbyC rsJ3AY5rr15B+PSdpeW+JR/FZD0ipx/PTzHqIwAe77KByLkSMlmKsLPsKEDWkQTj 6vciSLRVI+ofpRIObah8Ec6M20My4lLTWoS/yJUuAbPAkOBFuBr1YvfPa6mEDU+p +zZfyWS75K9QYUlME5wj4dswWJp7rpBxYH4WEy3Cq9QLlbhGygPFBMK0Q+voaeCG rp9zmJ6ts98YNKVxrYY6ZLIlw0vwLg1PspBXi7y5G65cxeJsxiQeBbmRL1E4TBw= = X-Virus-Scanned: amavisd-new at usg-ed-osssrv.wdc.com From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Richard Henderson , qemu-stable@nongnu.org, Alistair Francis , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 26/45] target/riscv: Set pc_succ_insn for !rvc illegal insn Date: Mon, 19 Dec 2022 12:16:44 +1000 Message-Id: <20221219021703.20473-27-alistair.francis@opensource.wdc.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221219021703.20473-1-alistair.francis@opensource.wdc.com> References: <20221219021703.20473-1-alistair.francis@opensource.wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=345d64987=alistair.francis@opensource.wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1671416754995100006 Content-Type: text/plain; charset="utf-8" From: Richard Henderson Failure to set pc_succ_insn may result in a TB covering zero bytes, which triggers an assert within the code generator. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1224 Signed-off-by: Richard Henderson Reviewed-by: Alistair Francis Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-Id: <20221203175744.151365-1-richard.henderson@linaro.org> Signed-off-by: Alistair Francis --- target/riscv/translate.c | 12 ++++-------- tests/tcg/Makefile.target | 2 ++ tests/tcg/riscv64/Makefile.target | 5 +++++ tests/tcg/riscv64/test-noc.S | 32 +++++++++++++++++++++++++++++++ 4 files changed, 43 insertions(+), 8 deletions(-) create mode 100644 tests/tcg/riscv64/test-noc.S diff --git a/target/riscv/translate.c b/target/riscv/translate.c index cd5eb25ee8..160aefc3df 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1096,14 +1096,10 @@ static void decode_opc(CPURISCVState *env, DisasCon= text *ctx, uint16_t opcode) ctx->virt_inst_excp =3D false; /* Check for compressed insn */ if (insn_len(opcode) =3D=3D 2) { - if (!has_ext(ctx, RVC)) { - gen_exception_illegal(ctx); - } else { - ctx->opcode =3D opcode; - ctx->pc_succ_insn =3D ctx->base.pc_next + 2; - if (decode_insn16(ctx, opcode)) { - return; - } + ctx->opcode =3D opcode; + ctx->pc_succ_insn =3D ctx->base.pc_next + 2; + if (has_ext(ctx, RVC) && decode_insn16(ctx, opcode)) { + return; } } else { uint32_t opcode32 =3D opcode; diff --git a/tests/tcg/Makefile.target b/tests/tcg/Makefile.target index 75257f2b29..14bc013181 100644 --- a/tests/tcg/Makefile.target +++ b/tests/tcg/Makefile.target @@ -117,6 +117,8 @@ endif =20 %: %.c $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS) +%: %.S + $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS) else # For softmmu targets we include a different Makefile fragement as the # build options for bare programs are usually pretty different. They diff --git a/tests/tcg/riscv64/Makefile.target b/tests/tcg/riscv64/Makefile= .target index b5b89dfb0e..9973ba3b5f 100644 --- a/tests/tcg/riscv64/Makefile.target +++ b/tests/tcg/riscv64/Makefile.target @@ -4,3 +4,8 @@ VPATH +=3D $(SRC_PATH)/tests/tcg/riscv64 TESTS +=3D test-div TESTS +=3D noexec + +# Disable compressed instructions for test-noc +TESTS +=3D test-noc +test-noc: LDFLAGS =3D -nostdlib -static +run-test-noc: QEMU_OPTS +=3D -cpu rv64,c=3Dfalse diff --git a/tests/tcg/riscv64/test-noc.S b/tests/tcg/riscv64/test-noc.S new file mode 100644 index 0000000000..e29d60c8b3 --- /dev/null +++ b/tests/tcg/riscv64/test-noc.S @@ -0,0 +1,32 @@ +#include + + .text + .globl _start +_start: + .option norvc + li a0, 4 /* SIGILL */ + la a1, sa + li a2, 0 + li a3, 8 + li a7, __NR_rt_sigaction + scall + + .option rvc + li a0, 1 + j exit + .option norvc + +pass: + li a0, 0 +exit: + li a7, __NR_exit + scall + + .data + /* struct kernel_sigaction sa =3D { .sa_handler =3D pass }; */ + .type sa, @object + .size sa, 32 +sa: + .dword pass + .zero 24 + --=20 2.38.1