1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <stdio.h> 29 #include <stdarg.h> 30 #include <string.h> 31 #include <string_ext.h> 32 #include <trace.h> 33 #include <util.h> 34 #include <utee_syscalls.h> 35 36 #if TRACE_LEVEL > 0 37 38 void trace_ext_puts(const char *str) 39 { 40 utee_log(str, strlen(str)); 41 } 42 43 int trace_ext_get_thread_id(void) 44 { 45 return -1; 46 } 47 48 /* 49 * printf and puts - stdio printf support 50 * 51 * 'printf()' and 'puts()' traces have the 'info' trace level. 52 */ 53 int printf(const char *fmt, ...) 54 { 55 char to_format[MAX_PRINT_SIZE]; 56 va_list ap; 57 int s; 58 59 if (trace_get_level() < TRACE_PRINTF_LEVEL) 60 return 0; 61 62 va_start(ap, fmt); 63 s = vsnprintf(to_format, sizeof(to_format), fmt, ap); 64 va_end(ap); 65 66 if (s < 0) 67 return s; 68 69 trace_ext_puts(to_format); 70 71 return s; 72 } 73 74 int puts(const char *str) 75 { 76 if (trace_get_level() >= TRACE_PRINTF_LEVEL) { 77 trace_ext_puts(str); 78 trace_ext_puts("\n"); 79 } 80 return 1; 81 } 82 83 int putchar(int c) 84 { 85 char str[2] = { (char)c, '\0' }; 86 87 if (trace_get_level() >= TRACE_PRINTF_LEVEL) 88 trace_ext_puts(str); 89 /* 90 * From the putchar() man page: 91 * "fputc(), putc() and putchar() return the character written as an 92 * unsigned char cast to an int or EOF on error." 93 */ 94 return (int)(unsigned char)c; 95 } 96 97 #else 98 99 int printf(const char *fmt __unused, ...) 100 { 101 return 0; 102 } 103 104 int puts(const char *str __unused) 105 { 106 return 0; 107 } 108 109 int putchar(int c) 110 { 111 return (int)(unsigned char)c; 112 } 113 114 #endif 115