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(localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 8F7AF1FF93; Tue, 14 May 2019 16:53:02 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Tue, 14 May 2019 16:52:56 +0100 Message-Id: <20190514155301.16123-7-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190514155301.16123-1-alex.bennee@linaro.org> References: <20190514155301.16123-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::343 Subject: [Qemu-devel] [RFC PATCH 06/11] target/arm: use the common interface for WRITE0/WRITEC in arm-semi X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Riku Voipio , qemu-arm@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Laurent Vivier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Now we have a common semihosting console interface use that for our string output. However ARM is currently unique in also supporting semihosting for linux-user so we need to replicate the API in linux-user. If other architectures gain this support we can move the file later. Signed-off-by: Alex Bennée --- linux-user/Makefile.objs | 2 ++ linux-user/arm/semihost.c | 24 ++++++++++++++++++++++++ target/arm/arm-semi.c | 31 ++++++------------------------- 3 files changed, 32 insertions(+), 25 deletions(-) create mode 100644 linux-user/arm/semihost.c diff --git a/linux-user/Makefile.objs b/linux-user/Makefile.objs index 769b8d83362..285c5dfa17a 100644 --- a/linux-user/Makefile.objs +++ b/linux-user/Makefile.objs @@ -6,4 +6,6 @@ obj-y = main.o syscall.o strace.o mmap.o signal.o \ obj-$(TARGET_HAS_BFLT) += flatload.o obj-$(TARGET_I386) += vm86.o obj-$(TARGET_ARM) += arm/nwfpe/ +obj-$(TARGET_ARM) += arm/semihost.o +obj-$(TARGET_AARCH64) += arm/semihost.o obj-$(TARGET_M68K) += m68k-sim.o diff --git a/linux-user/arm/semihost.c b/linux-user/arm/semihost.c new file mode 100644 index 00000000000..9554102a855 --- /dev/null +++ b/linux-user/arm/semihost.c @@ -0,0 +1,24 @@ +/* + * ARM Semihosting Console Support + * + * Copyright (c) 2019 Linaro Ltd + * + * Currently ARM is unique in having support for semihosting support + * in linux-user. So for now we implement the common console API but + * just for arm linux-user. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "cpu.h" +#include "hw/semihosting/console.h" +#include "qemu.h" + +int qemu_semihosting_console_out(CPUArchState *env, target_ulong addr, int len) +{ + void *s = lock_user_string(addr); + len = write(STDERR_FILENO, s, len ? len : strlen(s)); + unlock_user(s, addr, 0); + return len; +} diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c index 9e5a414dd89..253c66b172a 100644 --- a/target/arm/arm-semi.c +++ b/target/arm/arm-semi.c @@ -27,6 +27,7 @@ #include "cpu.h" #include "hw/semihosting/semihost.h" +#include "hw/semihosting/console.h" #ifdef CONFIG_USER_ONLY #include "qemu.h" @@ -314,32 +315,12 @@ target_ulong do_arm_semihosting(CPUARMState *env) return set_swi_errno(ts, close(arg0)); } case TARGET_SYS_WRITEC: - { - char c; - - if (get_user_u8(c, args)) - /* FIXME - should this error code be -TARGET_EFAULT ? */ - return (uint32_t)-1; - /* Write to debug console. stderr is near enough. */ - if (use_gdb_syscalls()) { - return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,1", args); - } else { - return write(STDERR_FILENO, &c, 1); - } - } + { + qemu_semihosting_console_out(env, args, 1); + return 0xdeadbeef; + } case TARGET_SYS_WRITE0: - if (!(s = lock_user_string(args))) - /* FIXME - should this error code be -TARGET_EFAULT ? */ - return (uint32_t)-1; - len = strlen(s); - if (use_gdb_syscalls()) { - return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,%x", - args, len); - } else { - ret = write(STDERR_FILENO, s, len); - } - unlock_user(s, args, 0); - return ret; + return qemu_semihosting_console_out(env, args, 0); case TARGET_SYS_WRITE: GET_ARG(0); GET_ARG(1); -- 2.20.1