From patchwork Sat Apr 30 13:29:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 12833284 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 505A0C433EF for ; Sat, 30 Apr 2022 13:56:18 +0000 (UTC) Received: from localhost ([::1]:55044 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nkna5-00047R-Af for qemu-devel@archiver.kernel.org; Sat, 30 Apr 2022 09:56:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56832) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nknDr-0003P5-2V for qemu-devel@nongnu.org; Sat, 30 Apr 2022 09:33:20 -0400 Received: from mail-pf1-x42f.google.com ([2607:f8b0:4864:20::42f]:42835) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nknDp-0006uC-2E for qemu-devel@nongnu.org; Sat, 30 Apr 2022 09:33:18 -0400 Received: by mail-pf1-x42f.google.com with SMTP id x23so3777116pff.9 for ; Sat, 30 Apr 2022 06:33:16 -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=O00AgyFrOx6VT5cHkpUCMbRE4gEXAb+bzYu/d7WzwIk=; b=Dog+oZq8mQym3y0dPttbZLYuNlHR7as9+Uur7LXTrUTRvvJmAgPicmFkwOoJCQlhiK JBYdkbNtVsJLXuHjwfAWo99ExQddFi6i9HwHxza+i63msyp1cxfWL0yKiBOAU1SiYqVG 90LK/zKXW6XOsfmTb/Eley9Q/7tCYoArrDoB+O57XJsx1JzCaEZE2Y2XLCxcJP19Ltx0 jKluPhtCoWW9YP3jfEH3AUZNKghf517xyEVkhgv+cgMQ/7v/LTJ8R6h0bZO0kSN8Zqjy vZJhTADzzcNaim+NFjHQ78Ox6kCT8ogJOHwe9uvcaE6s6yl4EhaCviuiFgATL30IbE8j RTMw== 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=O00AgyFrOx6VT5cHkpUCMbRE4gEXAb+bzYu/d7WzwIk=; b=uVXma2dPf9NLuGlcfYsK6fYizu5c9rwQqK+99iFuyhEXD8FfMUGmch7huPUW1Oww6n /TNQ8E5UPhbedBJrtd3J9NO6xizyWi0e9y2TdBH17bUbqAEhDjq1RTZ7ILI3wfZ2SZqt CS455GqkzKZwOU00v4Uv/FiIS1iwWRmpJXmqqFAsF5ISxTaKviVTa2kXHvzReQt/I5G9 nFajj1g9mUFrRcfmLTYhE1KaDHF22xhdBu6cS+eENyAOZ4c53dRI28QMYV1/6l5Ww+Th VUv0Ifpy7yxcUqE7GGDyBv6rLNXp/4UN3fLTE96sSpqE5rVRbsWXl0YHxTtj9msvaMIJ Smjw== X-Gm-Message-State: AOAM5334apj+lsBkz1epATSdpl4Jg/qMTrUm3TfwWyLEtTWb1O+cR08T UNyCkWbplSwD/B5pgSx6fnVbwE2NXqdh6w== X-Google-Smtp-Source: ABdhPJx9l2kyTOa26SaRoH9s6Pc/yfXC2REX+XCvfXicpQB6+TkQwy2WBApbOrSc7df9XS/xG+aMqw== X-Received: by 2002:a63:914b:0:b0:3ab:48:8a16 with SMTP id l72-20020a63914b000000b003ab00488a16mr3172025pge.617.1651325595686; Sat, 30 Apr 2022 06:33:15 -0700 (PDT) Received: from stoup.. ([71.212.142.129]) by smtp.gmail.com with ESMTPSA id c136-20020a63358e000000b003c14af5063bsm8517840pga.83.2022.04.30.06.33.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 Apr 2022 06:33:15 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 42/43] target/nios2: Use guestfd.h to implement syscalls. Date: Sat, 30 Apr 2022 06:29:31 -0700 Message-Id: <20220430132932.324018-43-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220430132932.324018-1-richard.henderson@linaro.org> References: <20220430132932.324018-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42f; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42f.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: , Cc: crwulff@gmail.com, alex.bennee@linaro.org, f4bug@amsat.org, laurent@vivier.eu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This separates guest file descriptors from host file descriptors, and utilizes shared infrastructure for integration with gdbstub. Signed-off-by: Richard Henderson --- target/nios2/nios2-semi.c | 287 ++++++-------------------------------- 1 file changed, 41 insertions(+), 246 deletions(-) diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c index bdf8849689..3dad72d1f6 100644 --- a/target/nios2/nios2-semi.c +++ b/target/nios2/nios2-semi.c @@ -25,6 +25,7 @@ #include "cpu.h" #include "exec/gdbstub.h" +#include "semihosting/guestfd.h" #if defined(CONFIG_USER_ONLY) #include "qemu.h" #else @@ -47,67 +48,6 @@ #define HOSTED_ISATTY 12 #define HOSTED_SYSTEM 13 -static int translate_openflags(int flags) -{ - int hf; - - if (flags & GDB_O_WRONLY) { - hf = O_WRONLY; - } else if (flags & GDB_O_RDWR) { - hf = O_RDWR; - } else { - hf = O_RDONLY; - } - - if (flags & GDB_O_APPEND) { - hf |= O_APPEND; - } - if (flags & GDB_O_CREAT) { - hf |= O_CREAT; - } - if (flags & GDB_O_TRUNC) { - hf |= O_TRUNC; - } - if (flags & GDB_O_EXCL) { - hf |= O_EXCL; - } - - return hf; -} - -static bool translate_stat(CPUNios2State *env, target_ulong addr, - struct stat *s) -{ - struct gdb_stat *p; - - p = lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0); - - if (!p) { - return false; - } - p->gdb_st_dev = cpu_to_be32(s->st_dev); - p->gdb_st_ino = cpu_to_be32(s->st_ino); - p->gdb_st_mode = cpu_to_be32(s->st_mode); - p->gdb_st_nlink = cpu_to_be32(s->st_nlink); - p->gdb_st_uid = cpu_to_be32(s->st_uid); - p->gdb_st_gid = cpu_to_be32(s->st_gid); - p->gdb_st_rdev = cpu_to_be32(s->st_rdev); - p->gdb_st_size = cpu_to_be64(s->st_size); -#ifdef _WIN32 - /* Windows stat is missing some fields. */ - p->gdb_st_blksize = 0; - p->gdb_st_blocks = 0; -#else - p->gdb_st_blksize = cpu_to_be64(s->st_blksize); - p->gdb_st_blocks = cpu_to_be64(s->st_blocks); -#endif - p->gdb_st_atime = cpu_to_be32(s->st_atime); - p->gdb_st_mtime = cpu_to_be32(s->st_mtime); - p->gdb_st_ctime = cpu_to_be32(s->st_ctime); - unlock_user(p, addr, sizeof(struct gdb_stat)); - return true; -} - static void nios2_semi_u32_cb(CPUState *cs, uint64_t ret, int err) { Nios2CPU *cpu = NIOS2_CPU(cs); @@ -147,8 +87,6 @@ static void nios2_semi_u64_cb(CPUState *cs, uint64_t ret, int err) */ #define GET_ARG(n) do { \ if (get_user_ual(arg ## n, args + (n) * 4)) { \ - result = -1; \ - errno = EFAULT; \ goto failed; \ } \ } while (0) @@ -159,10 +97,6 @@ void do_nios2_semihosting(CPUNios2State *env) int nr; uint32_t args; target_ulong arg0, arg1, arg2, arg3; - void *p; - void *q; - uint32_t len; - uint32_t result; nr = env->regs[R_ARG0]; args = env->regs[R_ARG1]; @@ -170,234 +104,95 @@ void do_nios2_semihosting(CPUNios2State *env) case HOSTED_EXIT: gdb_exit(env->regs[R_ARG0]); exit(env->regs[R_ARG0]); + case HOSTED_OPEN: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1, - arg2, arg3); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = open(p, translate_openflags(arg2), arg3); - unlock_user(p, arg0, 0); - } - } + semihost_sys_open(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_CLOSE: - { - /* Ignore attempts to close stdin/out/err. */ - GET_ARG(0); - int fd = arg0; - if (fd > 2) { - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "close,%x", arg0); - return; - } else { - result = close(fd); - } - } else { - result = 0; - } - break; - } + GET_ARG(0); + semihost_sys_close(cs, nios2_semi_u32_cb, arg0); + break; + case HOSTED_READ: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len = arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "read,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_WRITE, arg1, len, 0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = read(arg0, p, len); - unlock_user(p, arg1, len); - } - } + semihost_sys_read(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_WRITE: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len = arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "write,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_READ, arg1, len, 1); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = write(arg0, p, len); - unlock_user(p, arg0, 0); - } - } + semihost_sys_write(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_LSEEK: - { - uint64_t off; - GET_ARG(0); - GET_ARG(1); - GET_ARG(2); - GET_ARG(3); - off = (uint32_t)arg2 | ((uint64_t)arg1 << 32); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u64_cb, "lseek,%x,%lx,%x", - arg0, off, arg3); - } else { - off = lseek(arg0, off, arg3); - nios2_semi_u64_cb(cs, off, errno); - } - return; - } + GET_ARG(0); + GET_ARG(1); + GET_ARG(2); + GET_ARG(3); + semihost_sys_lseek(cs, nios2_semi_u64_cb, arg0, + deposit64(arg2, arg1, 32, 32), arg3); + break; + case HOSTED_RENAME: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "rename,%s,%s", - arg0, (int)arg1, arg2, (int)arg3); - return; - } else { - p = lock_user_string(arg0); - q = lock_user_string(arg2); - if (!p || !q) { - result = -1; - errno = EFAULT; - } else { - result = rename(p, q); - } - unlock_user(p, arg0, 0); - unlock_user(q, arg2, 0); - } + semihost_sys_rename(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_UNLINK: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "unlink,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = unlink(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_remove(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_STAT: GET_ARG(0); GET_ARG(1); GET_ARG(2); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "stat,%s,%x", - arg0, (int)arg1, arg2); - return; - } else { - struct stat s; - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = stat(p, &s); - unlock_user(p, arg0, 0); - } - if (result == 0 && !translate_stat(env, arg2, &s)) { - result = -1; - errno = EFAULT; - } - } + semihost_sys_stat(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_FSTAT: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "fstat,%x,%x", - arg0, arg1); - return; - } else { - struct stat s; - result = fstat(arg0, &s); - if (result == 0 && !translate_stat(env, arg1, &s)) { - result = -1; - errno = EFAULT; - } - } + semihost_sys_fstat(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_GETTIMEOFDAY: - /* Only the tv parameter is used. tz is assumed NULL. */ GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "gettimeofday,%x,%x", - arg0, 0); - return; - } else { - struct gdb_timeval *p; - int64_t rt = g_get_real_time(); - p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = 0; - p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC); - p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC); - unlock_user(p, arg0, sizeof(struct gdb_timeval)); - } - } + GET_ARG(1); + semihost_sys_gettimeofday(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_ISATTY: GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "isatty,%x", arg0); - return; - } else { - result = isatty(arg0); - } + semihost_sys_isatty(cs, nios2_semi_u32_cb, arg0); break; + case HOSTED_SYSTEM: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "system,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = system(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_system(cs, nios2_semi_u32_cb, arg0, arg1); break; + default: qemu_log_mask(LOG_GUEST_ERROR, "nios2-semihosting: unsupported " "semihosting syscall %d\n", nr); - result = 0; + nios2_semi_u32_cb(cs, -1, ENOSYS); + break; + + failed: + nios2_semi_u32_cb(cs, -1, EFAULT); + break; } -failed: - nios2_semi_u32_cb(cs, result, errno); }