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([71.212.142.129]) by smtp.gmail.com with ESMTPSA id 1-20020a17090a0cc100b001d2bff34228sm2517703pjt.9.2022.05.20.17.07.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 May 2022 17:07:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=/j2cw52lTOWH/atsAabzvb2VUFPtyq5zVPafxci6jYk=; b=M8z/3zqDdqn7ST5Du25y/V2ZkkZfNqe9spOmHajrFoLfBcL1Pub620ChrGI73T+EG9 tuhyLbDGtxTV4TN8KpH+Hy/B82z3FuOz6rly1hM2wbP0/i+Rv12o2cDzloIxflZBZQTJ p+l8gU11bZSuSUA95lFLzpOphb/SgTWctgb67rIwwF86DxafRh1MTq1NsVolJ5Xj4oTl uDP53fzy7ylivixL64HwQcvuPViqU/xcSm1j/WCrcCqresHuyV3ZY8KZSayk/mGmFe14 E0Af2Z7vbnbQZEC+FNfDaJ+opJp5g0FU74Qzc3CK3e7BXjl3qPQ/nIEI80+cnJSFQ/o/ 9fiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/j2cw52lTOWH/atsAabzvb2VUFPtyq5zVPafxci6jYk=; b=PLDdciXYmA/X2idnL+nSrmuxRu6zKmFWHqL6UdvjtMcXB7zyWhiUtMyMwL/1ofqyXm Pivm8cgTz1TFhseM/P2VNdbJrmctLe7JQ2YWunH7eZFZnlgqCeQdhrj0Es45UV+kg3Ov lucx5sEQN+9jtyhF0yGGUSD1V/HjfUlXuXHfp00y+iApI9OVQFAjU1gvQGctnPKDFiXR IGp/Xz9NYxlnmMDFEsMidoJd40w4x9yG0KklBpFMeCqKatnKGvjxsRjw2+VoeEoa4fv/ QmZ6DhOH2ZwJ513lcflflFM4bJ0//9PVQL0FKUWsZb4VlxUV16Iy6F+9JN8NEbb7nDgK f8zg== X-Gm-Message-State: AOAM530IKZf18lHmL+VTX9eJsOs+y4y478awEMkyAAybWvpwDnTtM90o KEhxmK08AGVc412HD0f6/8duOHKvvFigEA== X-Google-Smtp-Source: ABdhPJwXyOtjUgSEtrDGbjAluekEI8F94Cgg3/3dzntDKBVvz1O3Sb3QclBnNBSvtnzhHq6XQwRp5g== X-Received: by 2002:a17:903:120a:b0:15f:99f:95bc with SMTP id l10-20020a170903120a00b0015f099f95bcmr12108436plh.48.1653091669222; Fri, 20 May 2022 17:07:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, alex.bennee@linaro.org Subject: [PATCH v3 42/49] semihosting: Add GuestFDConsole Date: Fri, 20 May 2022 17:03:53 -0700 Message-Id: <20220521000400.454525-43-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220521000400.454525-1-richard.henderson@linaro.org> References: <20220521000400.454525-1-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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1035; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1035.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+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1653095379199100001 Content-Type: text/plain; charset="utf-8" Add a GuestFDType for connecting to the semihosting console. Hook up to read, write, isatty, and fstat syscalls. Note that the arm-specific syscall flen cannot be applied to the console, because the console is not a descriptor exposed to the guest. Signed-off-by: Richard Henderson --- include/semihosting/guestfd.h | 7 ++-- semihosting/syscalls.c | 68 +++++++++++++++++++++++++++++++++++ 2 files changed, 72 insertions(+), 3 deletions(-) diff --git a/include/semihosting/guestfd.h b/include/semihosting/guestfd.h index ef268abe85..a7ea1041ea 100644 --- a/include/semihosting/guestfd.h +++ b/include/semihosting/guestfd.h @@ -13,9 +13,10 @@ =20 typedef enum GuestFDType { GuestFDUnused =3D 0, - GuestFDHost =3D 1, - GuestFDGDB =3D 2, - GuestFDStatic =3D 3, + GuestFDHost, + GuestFDGDB, + GuestFDStatic, + GuestFDConsole, } GuestFDType; =20 /* diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c index 4c934654cd..aa4ee47649 100644 --- a/semihosting/syscalls.c +++ b/semihosting/syscalls.c @@ -10,6 +10,7 @@ #include "exec/gdbstub.h" #include "semihosting/guestfd.h" #include "semihosting/syscalls.h" +#include "semihosting/console.h" #ifdef CONFIG_USER_ONLY #include "qemu.h" #else @@ -607,6 +608,56 @@ static void staticfile_flen(CPUState *cs, gdb_syscall_= complete_cb complete, complete(cs, gf->staticfile.len, 0); } =20 +/* + * Console semihosting syscall implementations. + */ + +static void console_read(CPUState *cs, gdb_syscall_complete_cb complete, + GuestFD *gf, target_ulong buf, target_ulong len) +{ + CPUArchState *env G_GNUC_UNUSED =3D cs->env_ptr; + char *ptr; + int ret; + + ptr =3D lock_user(VERIFY_WRITE, buf, len, 0); + if (!ptr) { + complete(cs, -1, EFAULT); + return; + } + ret =3D qemu_semihosting_console_read(cs, ptr, len); + complete(cs, ret, 0); + unlock_user(ptr, buf, ret); +} + +static void console_write(CPUState *cs, gdb_syscall_complete_cb complete, + GuestFD *gf, target_ulong buf, target_ulong len) +{ + CPUArchState *env G_GNUC_UNUSED =3D cs->env_ptr; + char *ptr =3D lock_user(VERIFY_READ, buf, len, 1); + int ret; + + if (!ptr) { + complete(cs, -1, EFAULT); + return; + } + ret =3D qemu_semihosting_console_write(ptr, len); + complete(cs, ret ? ret : -1, ret ? 0 : EIO); + unlock_user(ptr, buf, ret); +} + +static void console_fstat(CPUState *cs, gdb_syscall_complete_cb complete, + GuestFD *gf, target_ulong addr) +{ + static const struct stat tty_buf =3D { + .st_mode =3D 020666, /* S_IFCHR, ugo+rw */ + .st_rdev =3D 5, /* makedev(5, 0) -- linux /dev/tty */ + }; + int ret; + + ret =3D copy_stat_to_user(cs, addr, &tty_buf); + complete(cs, ret ? -1 : 0, ret ? -ret : 0); +} + /* * Syscall entry points. */ @@ -638,6 +689,7 @@ void semihost_sys_close(CPUState *cs, gdb_syscall_compl= ete_cb complete, int fd) host_close(cs, complete, gf); break; case GuestFDStatic: + case GuestFDConsole: complete(cs, 0, 0); break; default: @@ -667,6 +719,9 @@ void semihost_sys_read_gf(CPUState *cs, gdb_syscall_com= plete_cb complete, case GuestFDStatic: staticfile_read(cs, complete, gf, buf, len); break; + case GuestFDConsole: + console_read(cs, complete, gf, buf, len); + break; default: g_assert_not_reached(); } @@ -702,6 +757,9 @@ void semihost_sys_write_gf(CPUState *cs, gdb_syscall_co= mplete_cb complete, case GuestFDHost: host_write(cs, complete, gf, buf, len); break; + case GuestFDConsole: + console_write(cs, complete, gf, buf, len); + break; case GuestFDStatic: /* Static files are never open for writing: EBADF. */ complete(cs, -1, GDB_EBADF); @@ -742,6 +800,9 @@ void semihost_sys_lseek(CPUState *cs, gdb_syscall_compl= ete_cb complete, case GuestFDStatic: staticfile_lseek(cs, complete, gf, off, gdb_whence); break; + case GuestFDConsole: + complete(cs, -1, ESPIPE); + break; default: g_assert_not_reached(); } @@ -765,6 +826,9 @@ void semihost_sys_isatty(CPUState *cs, gdb_syscall_comp= lete_cb complete, int fd) case GuestFDStatic: complete(cs, 0, GDB_ENOTTY); break; + case GuestFDConsole: + complete(cs, 1, 0); + break; default: g_assert_not_reached(); } @@ -790,6 +854,7 @@ void semihost_sys_flen(CPUState *cs, gdb_syscall_comple= te_cb fstat_cb, case GuestFDStatic: staticfile_flen(cs, flen_cb, gf); break; + case GuestFDConsole: default: g_assert_not_reached(); } @@ -811,6 +876,9 @@ void semihost_sys_fstat(CPUState *cs, gdb_syscall_compl= ete_cb complete, case GuestFDHost: host_fstat(cs, complete, gf, addr); break; + case GuestFDConsole: + console_fstat(cs, complete, gf, addr); + break; case GuestFDStatic: default: g_assert_not_reached(); --=20 2.34.1