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-rw-r--r--qemu/tests/multiboot/libc.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/qemu/tests/multiboot/libc.c b/qemu/tests/multiboot/libc.c
new file mode 100644
index 000000000..6df9bda96
--- /dev/null
+++ b/qemu/tests/multiboot/libc.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "libc.h"
+
+void* memcpy(void *dest, const void *src, int n)
+{
+ char *d = dest;
+ const char *s = src;
+
+ while (n--) {
+ *d++ = *s++;
+ }
+
+ return dest;
+}
+
+static void print_char(char c)
+{
+ outb(0xe9, c);
+}
+
+static void print_str(char *s)
+{
+ while (*s) {
+ print_char(*s++);
+ }
+}
+
+static void print_num(uint64_t value, int base)
+{
+ char digits[] = "0123456789abcdef";
+ char buf[32] = { 0 };
+ int i = sizeof(buf) - 2;
+
+ do {
+ buf[i--] = digits[value % base];
+ value /= base;
+ } while (value);
+
+ print_str(&buf[i + 1]);
+}
+
+void printf(const char *fmt, ...)
+{
+ va_list ap;
+ uint64_t val;
+ char *str;
+ int base;
+ int has_long;
+ int alt_form;
+
+ va_start(ap, fmt);
+
+ for (; *fmt; fmt++) {
+ if (*fmt != '%') {
+ print_char(*fmt);
+ continue;
+ }
+ fmt++;
+
+ if (*fmt == '#') {
+ fmt++;
+ alt_form = 1;
+ } else {
+ alt_form = 0;
+ }
+
+ if (*fmt == 'l') {
+ fmt++;
+ if (*fmt == 'l') {
+ fmt++;
+ has_long = 2;
+ } else {
+ has_long = 1;
+ }
+ } else {
+ has_long = 0;
+ }
+
+ switch (*fmt) {
+ case 'x':
+ case 'p':
+ base = 16;
+ goto convert_number;
+ case 'd':
+ case 'i':
+ case 'u':
+ base = 10;
+ goto convert_number;
+ case 'o':
+ base = 8;
+ goto convert_number;
+
+ convert_number:
+ switch (has_long) {
+ case 0:
+ val = va_arg(ap, unsigned int);
+ break;
+ case 1:
+ val = va_arg(ap, unsigned long);
+ break;
+ case 2:
+ val = va_arg(ap, unsigned long long);
+ break;
+ }
+
+ if (alt_form && base == 16) {
+ print_str("0x");
+ }
+
+ print_num(val, base);
+ break;
+
+ case 's':
+ str = va_arg(ap, char*);
+ print_str(str);
+ break;
+ case '%':
+ print_char(*fmt);
+ break;
+ default:
+ print_char('%');
+ print_char(*fmt);
+ break;
+ }
+ }
+
+ va_end(ap);
+}
+
+