From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E589CC10F14 for ; Tue, 15 Oct 2019 17:54:09 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9095F2067B for ; Tue, 15 Oct 2019 17:54:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="DagjfiVG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9095F2067B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iKR1M-0007KR-Hl for qemu-devel@archiver.kernel.org; Tue, 15 Oct 2019 13:54:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54617) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iKQz0-0004yP-46 for qemu-devel@nongnu.org; Tue, 15 Oct 2019 13:51:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iKQyz-0003S9-05 for qemu-devel@nongnu.org; Tue, 15 Oct 2019 13:51:42 -0400 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]:34386) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iKQyy-0003Re-R0 for qemu-devel@nongnu.org; Tue, 15 Oct 2019 13:51:40 -0400 Received: by mail-pf1-x442.google.com with SMTP id b128so12971570pfa.1 for ; Tue, 15 Oct 2019 10:51:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references; bh=8nOrlYeU5zcIwPQAiPQrEysfQ5wBLY582fozX0r/c2U=; b=DagjfiVGE76/S65G6eK8NIEjaJ0kab+fsDI39tEYEjw+UOlTN3hrj885V1WFlfP38O IT520qzq/QtWQgIljzWKhHGbPtD0HI6B0VllBSuKzh0Xh1CoOe8n7U/uvz0VDmuAiWRp AslcbdRu8aw+Sk3gwjaqNq/dcMkizrU62IB51iBGvlvSclIaHAMcAYUUFk7+IHVpb7ak gfTXVcdNZbq33oN3KOs3W9nwe4BpVEVyz7rUm6aeFJUH0EyJotWes2LJzukliyPqtUUV OcuUFdEXPhP0PGsAbSeZFABJOfL6EQd85QiXzLmWX2kaH299tT4F4ojB9N/fZclGAw10 039A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=8nOrlYeU5zcIwPQAiPQrEysfQ5wBLY582fozX0r/c2U=; b=dLYudaMzOrCvJPwwRQgUDefMIRwOCOP84j1IoO86HgHo2EODol4VLPLxOt5MTFgZxu qNgIxoxC1CqSuQ8GlIz56Zz7DBRz0Bcmm4sw7bjQOUs4s7htOYLSLE9TF4l/eVUiB7rO SBeiuMyar7txMsLnVmSxjYNPfM/ewfn7acnPtQwWwZXyKm1NTt3w5s40zmbSdUsRK3Mk c02qBAfcabXtvYI3WiQ+2w5GzvcXfWqDgkmJsaoOgyTsH0NzcmnAl9wWKH9oOfGuyd/X F45E8PBbdbIIlHofEUQ43fdFCV2xCidnEW6A5a+qOAq/txCEMd76nfpY0uKNcDGHTDp2 YWEQ== X-Gm-Message-State: APjAAAVSSEbZ5PNV5zt+XYgYTdra5tOxwzpphNV2KoH66b82zeHO39lG 9viBJDZbbHZ6gGHngT0aPUyeAo5NRRo= X-Google-Smtp-Source: APXvYqysThFjDkfzq0Rqk3aJITJ8a6I83UvXa2dDb4gH3ZXKZp8PayvPz1KdObrk2VM2VejoS5zHVw== X-Received: by 2002:a17:90a:8085:: with SMTP id c5mr14018255pjn.60.1571161899372; Tue, 15 Oct 2019 10:51:39 -0700 (PDT) Received: from localhost.localdomain (97-113-7-119.tukw.qwest.net. [97.113.7.119]) by smtp.gmail.com with ESMTPSA id t68sm20867845pgt.61.2019.10.15.10.51.38 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Oct 2019 10:51:38 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 3/3] capstone: Add s390x skipdata callback Date: Tue, 15 Oct 2019 10:51:33 -0700 Message-Id: <20191015175133.16598-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191015175133.16598-1-richard.henderson@linaro.org> References: <20191015175133.16598-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::442 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Capstone assumes any unknown instruction is 2 bytes. Instead, use the ilen field in the first two bits of the instruction to stay in sync with the insn stream. Signed-off-by: Richard Henderson --- disas.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/disas.c b/disas.c index 51c71534a3..2a000cbeb0 100644 --- a/disas.c +++ b/disas.c @@ -178,6 +178,39 @@ static int print_insn_od_target(bfd_vma pc, disassemble_info *info) to share this across calls and across host vs target disassembly. */ static __thread cs_insn *cap_insn; +/* + * The capstone library always skips 2 bytes for S390X. + * This is less than ideal, since we can tell from the first two bits + * the size of the insn and thus stay in sync with the insn stream. + */ +static size_t CAPSTONE_API +cap_skipdata_s390x_cb(const uint8_t *code, size_t code_size, + size_t offset, void *user_data) +{ + size_t ilen; + + /* See get_ilen() in target/s390x/internal.h. */ + switch (code[offset] >> 6) { + case 0: + ilen = 2; + break; + case 1: + case 2: + ilen = 4; + break; + default: + ilen = 6; + break; + } + + return ilen; +} + +static const cs_opt_skipdata cap_skipdata_s390x = { + .mnemonic = ".byte", + .callback = cap_skipdata_s390x_cb +}; + /* Initialize the Capstone library. */ /* ??? It would be nice to cache this. We would need one handle for the host and one for the target. For most targets we can reset specific @@ -208,6 +241,10 @@ static cs_err cap_disas_start(disassemble_info *info, csh *handle) /* "Disassemble" unknown insns as ".byte W,X,Y,Z". */ cs_option(*handle, CS_OPT_SKIPDATA, CS_OPT_ON); + if (info->cap_arch == CS_ARCH_SYSZ) { + cs_option(*handle, CS_OPT_SKIPDATA_SETUP, + (uintptr_t)&cap_skipdata_s390x); + } /* Allocate temp space for cs_disasm_iter. */ if (cap_insn == NULL) { -- 2.17.1