diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/tests/multiboot/libc.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/tests/multiboot/libc.c')
-rw-r--r-- | qemu/tests/multiboot/libc.c | 151 |
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); +} + + |