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([71.212.142.129]) by smtp.gmail.com with ESMTPSA id x5-20020aa793a5000000b0050dc7628201sm1522606pff.219.2022.04.30.06.30.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 Apr 2022 06:30:09 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 36/43] target/m68k: Use guestfd.h to implement syscalls. Date: Sat, 30 Apr 2022 06:29:25 -0700 Message-Id: <20220430132932.324018-37-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::636; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x636.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+patch=linaro.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/m68k/m68k-semi.c | 268 ++++++---------------------------------- 1 file changed, 38 insertions(+), 230 deletions(-) diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c index 4b5621a101..71f9d42e6c 100644 --- a/target/m68k/m68k-semi.c +++ b/target/m68k/m68k-semi.c @@ -41,54 +41,6 @@ #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 void translate_stat(CPUM68KState *env, target_ulong addr, struct stat *s) -{ - struct gdb_stat *p; - - if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0))) - /* FIXME - should this return an error code? */ - return; - 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)); -} - static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err) { M68kCPU *cpu = M68K_CPU(cs); @@ -128,8 +80,6 @@ static void m68k_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) @@ -139,237 +89,93 @@ void do_m68k_semihosting(CPUM68KState *env, int nr) CPUState *cs = env_cpu(env); uint32_t args; target_ulong arg0, arg1, arg2, arg3; - void *p; - void *q; - uint32_t len; - uint32_t result; args = env->dregs[1]; switch (nr) { case HOSTED_EXIT: gdb_exit(env->dregs[0]); exit(env->dregs[0]); + case HOSTED_OPEN: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1, - arg2, arg3); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = open(p, translate_openflags(arg2), arg3); - unlock_user(p, arg0, 0); - } - } + semihost_sys_open(cs, m68k_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(m68k_semi_u32_cb, "close,%x", arg0); - return; - } else { - result = close(fd); - } - } else { - result = 0; - } - break; - } + GET_ARG(0); + semihost_sys_close(cs, m68k_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(m68k_semi_u32_cb, "read,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_WRITE, arg1, len, 0); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = read(arg0, p, len); - unlock_user(p, arg1, len); - } - } + semihost_sys_read(cs, m68k_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(m68k_semi_u32_cb, "write,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_READ, arg1, len, 1); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = write(arg0, p, len); - unlock_user(p, arg0, 0); - } - } + semihost_sys_write(cs, m68k_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(m68k_semi_u64_cb, "fseek,%x,%lx,%x", - arg0, off, arg3); - } else { - off = lseek(arg0, off, arg3); - m68k_semi_u64_cb(cs, off, errno); - } - return; - } + GET_ARG(0); + GET_ARG(1); + GET_ARG(2); + GET_ARG(3); + semihost_sys_lseek(cs, m68k_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(m68k_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) { - /* FIXME - check error code? */ - result = -1; - } else { - result = rename(p, q); - } - unlock_user(p, arg0, 0); - unlock_user(q, arg2, 0); - } + semihost_sys_rename(cs, m68k_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_UNLINK: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_semi_u32_cb, "unlink,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = unlink(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_remove(cs, m68k_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(m68k_semi_u32_cb, "stat,%s,%x", - arg0, (int)arg1, arg2); - return; - } else { - struct stat s; - p = lock_user_string(arg0); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = stat(p, &s); - unlock_user(p, arg0, 0); - } - if (result == 0) { - translate_stat(env, arg2, &s); - } - } + semihost_sys_stat(cs, m68k_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_FSTAT: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_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); - } - } + semihost_sys_fstat(cs, m68k_semi_u32_cb, arg0, arg1); break; + case HOSTED_GETTIMEOFDAY: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_semi_u32_cb, "gettimeofday,%x,%x", - arg0, arg1); - 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) { - /* FIXME - check error code? */ - result = -1; - } 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)); - } - } + semihost_sys_gettimeofday(cs, m68k_semi_u32_cb, arg0, arg1); break; + case HOSTED_ISATTY: GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_semi_u32_cb, "isatty,%x", arg0); - return; - } else { - result = isatty(arg0); - } + semihost_sys_isatty(cs, m68k_semi_u32_cb, arg0); break; + case HOSTED_SYSTEM: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(m68k_semi_u32_cb, "system,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - /* FIXME - check error code? */ - result = -1; - } else { - result = system(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_system(cs, m68k_semi_u32_cb, arg0, arg1); break; + case HOSTED_INIT_SIM: /* * FIXME: This is wrong for boards where RAM does not start at @@ -378,10 +184,12 @@ void do_m68k_semihosting(CPUM68KState *env, int nr) env->dregs[1] = current_machine->ram_size; env->aregs[7] = current_machine->ram_size; return; + default: cpu_abort(env_cpu(env), "Unsupported semihosting syscall %d\n", nr); - result = 0; + + failed: + m68k_semi_u32_cb(cs, -1, EFAULT); + break; } -failed: - m68k_semi_u32_cb(cs, result, errno); }