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GET /api/patches/2196514/?format=api
{ "id": 2196514, "url": "http://patchwork.ozlabs.org/api/patches/2196514/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260214131659.31378-2-shentey@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260214131659.31378-2-shentey@gmail.com>", "list_archive_url": null, "date": "2026-02-14T13:16:57", "name": "[1/3] target/i386/emulate/x86_decode: Fix compiler warning", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "2c8a04c7dc7c2462a26671063d78649ffdda9049", "submitter": { "id": 83251, "url": "http://patchwork.ozlabs.org/api/people/83251/?format=api", "name": "Bernhard Beschow", "email": "shentey@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260214131659.31378-2-shentey@gmail.com/mbox/", "series": [ { "id": 492172, "url": "http://patchwork.ozlabs.org/api/series/492172/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=492172", "date": "2026-02-14T13:16:58", "name": "i386 emulate fixes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/492172/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2196514/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196514/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=QTQMRFV2;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-wm1-x334.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "When compiling for i386-softmmu under MSYS2, GCC emits the following warning:\n\n In function 'get_reg_val',\n inlined from 'calc_modrm_operand64' at ../src/target/i386/emulate/x86_decode.c:1796:15:\n ../src/target/i386/emulate/x86_decode.c:1703:5: error: 'memcpy' forming offset [4, 7] is out of the bounds [0, 4] of object 'val' with type 'target_ulong' {aka 'unsigned int'} [-Werror=array-bounds=]\n 1703 | memcpy(&val,\n | ^~~~~~~~~~~~\n 1704 | get_reg_ref(env, reg, rex_present, is_extended, size),\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 1705 | size);\n | ~~~~~\n ../src/target/i386/emulate/x86_decode.c: In function 'calc_modrm_operand64':\n ../src/target/i386/emulate/x86_decode.c:1702:18: note: 'val' declared here\n 1702 | target_ulong val = 0;\n | ^~~\n\nIn the calc_modrm_operand64() case the compiler sees size == 8 to be mem-copied\nto a target_ulong variable which is only 4 bytes wide in case of i386-softmmu.\nNote that when size != 1, get_reg_ref() always returns a pointer to an 8 byte\nregister, regardless of the target_ulong size. Fix the compiler warning by\nalways providing 8 bytes of storage by means of uint64_t.\n\nFixes: 77a2dba45cc9 (\"target/i386/emulate: stop overloading decode->op[N].ptr\")\ncc: qemu-stable\nSigned-off-by: Bernhard Beschow <shentey@gmail.com>\n---\n target/i386/emulate/x86_decode.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/target/i386/emulate/x86_decode.c b/target/i386/emulate/x86_decode.c\nindex d037ed1142..6ad03b71b0 100644\n--- a/target/i386/emulate/x86_decode.c\n+++ b/target/i386/emulate/x86_decode.c\n@@ -1699,7 +1699,7 @@ void *get_reg_ref(CPUX86State *env, int reg, int rex_present,\n target_ulong get_reg_val(CPUX86State *env, int reg, int rex_present,\n int is_extended, int size)\n {\n- target_ulong val = 0;\n+ uint64_t val = 0;\n memcpy(&val,\n get_reg_ref(env, reg, rex_present, is_extended, size),\n size);\n", "prefixes": [ "1/3" ] }