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([148.252.133.210]) by smtp.gmail.com with ESMTPSA id e17-20020a5d4e91000000b0031433760a92sm9635256wru.115.2023.07.09.11.33.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Jul 2023 11:33:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688927620; x=1691519620; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=PG65sHHMcFZxBzSd8xJSgpPdsxuZoeu52o+OB1adTRg=; b=bWpCwr6oIeaRCR3Ljp5v3nPuvlCaD/jzUjNqgX71QHYBMq46PU2JuphL67Oz9eG+vH zVpSM3rAzArFaDZ9m+94SIgvLZS/YQYvBDOjfSzgpktizCpRmrCddd3eQUwensory+MN lFAza014Hzc1tnmVfQyrSM4Kd6tcI8e9zv2bNd/x91JIkl7XCuxXlkwGCvaAPxa98EDb Ag5/PbjIev+XMH7tsvC1WIXZuwLqJq5+cGfx9BOgWKI4FV18eCpQ5/6BaDeWXZau26jh +qGf0qmFOsaQZq435z7EC5yWjX8xWmjt8wyr/EF51Gvva6pgifU7g1nhIKsR9G+U+QIG q/BA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688927620; x=1691519620; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=PG65sHHMcFZxBzSd8xJSgpPdsxuZoeu52o+OB1adTRg=; b=fdFOQVCb9fHzpc+P6bjM0QLvtVllJxNdRa0hT5cjfbNpPHjc8zldBGpbiwNqLrRzcF +/lf+ggE/+GkKBMh4eEwUSdNm2jIFcqpR89j+be+yC7UbF0I+gvcnyeNNgCSlmpBS+La u4DVjDQICSzTQq9r2Pbw+5GIbR5gofg1WCqlJKQg0JzNuxkFYs4UifwmlakVBXjyQeBf GWCE8sgvHMemfXQFPHKyvt+ll0hkaMPfS6c9fPAS2wntR8n7A3PrcJIMOoGvDmd1LJel M6XCb3i0THPFSUVGIJZ/9IOFPNVchKx6Cw7sbPe3fiwsWgmq0Idra93aHTZjJsCb0A8M 39UQ== X-Gm-Message-State: ABy/qLYtN47WXKm57nbg3jh9b0N7vw/92CLLQ3xYrrxfaLrI+QkoI8MS 015oktLccEXzGowiLiWOzR/C9CPwDGXXll048V1Pmg== X-Google-Smtp-Source: APBJJlGAJMcgwp5FHZV0xgXEBkha/Xvi2D3OoLCZySTPTTho9zmRRvlyGCmm+8oLSxb48bXH+6tRcw== X-Received: by 2002:a1c:7416:0:b0:3fc:27:7e46 with SMTP id p22-20020a1c7416000000b003fc00277e46mr6260858wmc.3.1688927620257; Sun, 09 Jul 2023 11:33:40 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: laurent@vivier.eu Subject: [PATCH 38/45] linux-user: Rename mmap_reserve to mmap_reserve_or_unmap Date: Sun, 9 Jul 2023 19:29:27 +0100 Message-Id: <20230709182934.309468-76-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230709182934.309468-1-richard.henderson@linaro.org> References: <20230709182934.309468-1-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::335; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x335.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: 1688928016725100001 Content-Type: text/plain; charset="utf-8" If !reserved_va, munmap instead and assert success. Update all callers. Signed-off-by: Richard Henderson Message-Id: <20230707204054.8792-22-richard.henderson@linaro.org> --- linux-user/mmap.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 6308787942..22c2869be8 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -722,14 +722,14 @@ fail: return -1; } =20 -static void mmap_reserve(abi_ulong start, abi_ulong len) +static void mmap_reserve_or_unmap(abi_ulong start, abi_ulong len) { abi_ulong real_start; abi_ulong real_last; abi_ulong real_len; abi_ulong last; abi_ulong a; - void *host_start, *ptr; + void *host_start; int prot; =20 last =3D start + len - 1; @@ -776,9 +776,15 @@ static void mmap_reserve(abi_ulong start, abi_ulong le= n) real_len =3D real_last - real_start + 1; host_start =3D g2h_untagged(real_start); =20 - ptr =3D mmap(host_start, real_len, PROT_NONE, - MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1= , 0); - assert(ptr =3D=3D host_start); + if (reserved_va) { + void *ptr =3D mmap(host_start, real_len, PROT_NONE, + MAP_FIXED | MAP_ANONYMOUS + | MAP_PRIVATE | MAP_NORESERVE, -1, 0); + assert(ptr =3D=3D host_start); + } else { + int ret =3D munmap(host_start, real_len); + assert(ret =3D=3D 0); + } } =20 int target_munmap(abi_ulong start, abi_ulong len) @@ -830,11 +836,7 @@ int target_munmap(abi_ulong start, abi_ulong len) ret =3D 0; /* unmap what we can */ if (real_start < real_end) { - if (reserved_va) { - mmap_reserve(real_start, real_end - real_start); - } else { - ret =3D munmap(g2h_untagged(real_start), real_end - real_start= ); - } + mmap_reserve_or_unmap(real_start, real_end - real_start); } =20 if (ret =3D=3D 0) { @@ -871,7 +873,7 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong ol= d_size, * If new and old addresses overlap then the above mremap will * already have failed with EINVAL. */ - mmap_reserve(old_addr, old_size); + mmap_reserve_or_unmap(old_addr, old_size); } } else if (flags & MREMAP_MAYMOVE) { abi_ulong mmap_start; @@ -886,7 +888,7 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong ol= d_size, flags | MREMAP_FIXED, g2h_untagged(mmap_start)); if (reserved_va) { - mmap_reserve(old_addr, old_size); + mmap_reserve_or_unmap(old_addr, old_size); } } } else { @@ -912,7 +914,8 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong ol= d_size, errno =3D ENOMEM; host_addr =3D MAP_FAILED; } else if (reserved_va && old_size > new_size) { - mmap_reserve(old_addr + old_size, old_size - new_size); + mmap_reserve_or_unmap(old_addr + old_size, + old_size - new_size); } } } else { --=20 2.34.1