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Wed, 03 May 2023 00:27:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: ale@rev.ng, philmd@linaro.org, marcel.apfelbaum@gmail.com, wangyanan55@huawei.com, anjo@rev.ng Subject: [PATCH 74/84] tcg: Fix PAGE/PROT confusion Date: Wed, 3 May 2023 08:23:21 +0100 Message-Id: <20230503072331.1747057-75-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230503072331.1747057-1-richard.henderson@linaro.org> References: <20230503072331.1747057-1-richard.henderson@linaro.org> 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=2a00:1450:4864:20::32e; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x32e.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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1683099853518100001 Content-Type: text/plain; charset="utf-8" The bug was hidden because they happen to have the same values. Signed-off-by: Richard Henderson --- tcg/region.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/tcg/region.c b/tcg/region.c index 34ac124081..184e684b04 100644 --- a/tcg/region.c +++ b/tcg/region.c @@ -507,6 +507,14 @@ static int alloc_code_gen_buffer(size_t tb_size, int s= plitwx, Error **errp) return PROT_READ | PROT_WRITE; } #elif defined(_WIN32) +/* + * Local source-level compatibility with Unix. + * Used by tcg_region_init below. + */ +#define PROT_READ 1 +#define PROT_WRITE 2 +#define PROT_EXEC 4 + static int alloc_code_gen_buffer(size_t size, int splitwx, Error **errp) { void *buf; @@ -527,7 +535,7 @@ static int alloc_code_gen_buffer(size_t size, int split= wx, Error **errp) region.start_aligned =3D buf; region.total_size =3D size; =20 - return PAGE_READ | PAGE_WRITE | PAGE_EXEC; + return PROT_READ | PROT_WRITE | PROT_EXEC; } #else static int alloc_code_gen_buffer_anon(size_t size, int prot, @@ -796,10 +804,10 @@ void tcg_region_init(size_t tb_size, int splitwx, uns= igned max_cpus) * buffer -- let that one use hugepages throughout. * Work with the page protections set up with the initial mapping. */ - need_prot =3D PAGE_READ | PAGE_WRITE; + need_prot =3D PROT_READ | PROT_WRITE; #ifndef CONFIG_TCG_INTERPRETER if (tcg_splitwx_diff =3D=3D 0) { - need_prot |=3D PAGE_EXEC; + need_prot |=3D PROT_EXEC; } #endif for (size_t i =3D 0, n =3D region.n; i < n; i++) { @@ -809,9 +817,9 @@ void tcg_region_init(size_t tb_size, int splitwx, unsig= ned max_cpus) if (have_prot !=3D need_prot) { int rc; =20 - if (need_prot =3D=3D (PAGE_READ | PAGE_WRITE | PAGE_EXEC)) { + if (need_prot =3D=3D (PROT_READ | PROT_WRITE | PROT_EXEC)) { rc =3D qemu_mprotect_rwx(start, end - start); - } else if (need_prot =3D=3D (PAGE_READ | PAGE_WRITE)) { + } else if (need_prot =3D=3D (PROT_READ | PROT_WRITE)) { rc =3D qemu_mprotect_rw(start, end - start); } else { g_assert_not_reached(); --=20 2.34.1