added OS dependent functions (temporary as most functions are generic in fact)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@624 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/osdep.c b/osdep.c
new file mode 100644
index 0000000..d4d3364
--- /dev/null
+++ b/osdep.c
@@ -0,0 +1,460 @@
+/*
+ * QEMU low level functions
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/ipc.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "cpu.h"
+
+#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
+
+/* When not using soft mmu, libc independant functions are needed for
+ the CPU core because it needs to use alternates stacks and
+ libc/thread incompatibles settings */
+
+#include <linux/unistd.h>
+
+#define QEMU_SYSCALL0(name) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name)); \
+return __res; \
+}
+
+#define QEMU_SYSCALL1(name,arg1) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"b" ((long)(arg1))); \
+return __res; \
+}
+
+#define QEMU_SYSCALL2(name,arg1,arg2) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
+return __res; \
+}
+
+#define QEMU_SYSCALL3(name,arg1,arg2,arg3) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+ "d" ((long)(arg3))); \
+return __res; \
+}
+
+#define QEMU_SYSCALL4(name,arg1,arg2,arg3,arg4) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+ "d" ((long)(arg3)),"S" ((long)(arg4))); \
+return __res; \
+}
+
+#define QEMU_SYSCALL5(name,arg1,arg2,arg3,arg4,arg5) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+ "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
+return __res; \
+}
+
+#define QEMU_SYSCALL6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
+{ \
+long __res; \
+__asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; int $0x80 ; pop %%ebp" \
+ : "=a" (__res) \
+ : "i" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+ "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)), \
+ "0" ((long)(arg6))); \
+return __res; \
+}
+
+int qemu_write(int fd, const void *buf, size_t n)
+{
+ QEMU_SYSCALL3(write, fd, buf, n);
+}
+
+
+
+/****************************************************************/
+/* shmat replacement */
+
+int qemu_ipc(int call, unsigned long first,
+ unsigned long second, unsigned long third,
+ void *ptr, unsigned long fifth)
+{
+ QEMU_SYSCALL6(ipc, call, first, second, third, ptr, fifth);
+}
+
+#define SHMAT 21
+
+/* we must define shmat so that a specific address will be used when
+ mapping the X11 ximage */
+void *shmat(int shmid, const void *shmaddr, int shmflg)
+{
+ void *ptr;
+ int ret;
+ /* we give an address in the right memory area */
+ if (!shmaddr)
+ shmaddr = get_mmap_addr(8192 * 1024);
+ ret = qemu_ipc(SHMAT, shmid, shmflg, (unsigned long)&ptr, (void *)shmaddr, 0);
+ if (ret < 0)
+ return NULL;
+ return ptr;
+}
+
+/****************************************************************/
+/* memory allocation */
+
+//#define DEBUG_MALLOC
+
+#define MALLOC_BASE 0xab000000
+#define PHYS_RAM_BASE 0xac000000
+
+#define MALLOC_ALIGN 16
+#define BLOCK_HEADER_SIZE 16
+
+typedef struct MemoryBlock {
+ struct MemoryBlock *next;
+ unsigned long size; /* size of block, including header */
+} MemoryBlock;
+
+static MemoryBlock *first_free_block;
+static unsigned long malloc_addr = MALLOC_BASE;
+
+static void *malloc_get_space(size_t size)
+{
+ void *ptr;
+ size = TARGET_PAGE_ALIGN(size);
+ ptr = mmap((void *)malloc_addr, size,
+ PROT_WRITE | PROT_READ,
+ MAP_PRIVATE | MAP_FIXED | MAP_ANON, -1, 0);
+ if (ptr == MAP_FAILED)
+ return NULL;
+ malloc_addr += size;
+ return ptr;
+}
+
+void *qemu_malloc(size_t size)
+{
+ MemoryBlock *mb, *mb1, **pmb;
+ void *ptr;
+ size_t size1, area_size;
+
+ if (size == 0)
+ return NULL;
+
+ size = (size + BLOCK_HEADER_SIZE + MALLOC_ALIGN - 1) & ~(MALLOC_ALIGN - 1);
+ pmb = &first_free_block;
+ for(;;) {
+ mb = *pmb;
+ if (mb == NULL)
+ break;
+ if (size <= mb->size)
+ goto found;
+ pmb = &mb->next;
+ }
+ /* no big enough blocks found: get new space */
+ area_size = TARGET_PAGE_ALIGN(size);
+ mb = malloc_get_space(area_size);
+ if (!mb)
+ return NULL;
+ size1 = area_size - size;
+ if (size1 > 0) {
+ /* create a new free block */
+ mb1 = (MemoryBlock *)((uint8_t *)mb + size);
+ mb1->next = NULL;
+ mb1->size = size1;
+ *pmb = mb1;
+ }
+ goto the_end;
+ found:
+ /* a free block was found: use it */
+ size1 = mb->size - size;
+ if (size1 > 0) {
+ /* create a new free block */
+ mb1 = (MemoryBlock *)((uint8_t *)mb + size);
+ mb1->next = mb->next;
+ mb1->size = size1;
+ *pmb = mb1;
+ } else {
+ /* suppress the first block */
+ *pmb = mb->next;
+ }
+ the_end:
+ mb->size = size;
+ mb->next = NULL;
+ ptr = ((uint8_t *)mb + BLOCK_HEADER_SIZE);
+#ifdef DEBUG_MALLOC
+ qemu_printf("malloc: size=0x%x ptr=0x%lx\n", size, (unsigned long)ptr);
+#endif
+ return ptr;
+}
+
+void qemu_free(void *ptr)
+{
+ MemoryBlock *mb;
+
+ mb = (MemoryBlock *)((uint8_t *)ptr - BLOCK_HEADER_SIZE);
+ mb->next = first_free_block;
+ first_free_block = mb;
+}
+
+/****************************************************************/
+/* virtual memory allocation */
+
+unsigned long mmap_addr = PHYS_RAM_BASE;
+
+void *get_mmap_addr(unsigned long size)
+{
+ unsigned long addr;
+ addr = mmap_addr;
+ mmap_addr += ((size + 4095) & ~4095) + 4096;
+ return (void *)addr;
+}
+
+#else
+
+int qemu_write(int fd, const void *buf, size_t n)
+{
+ int ret;
+ ret = write(fd, buf, n);
+ if (ret < 0)
+ return -errno;
+ else
+ return ret;
+}
+
+void *get_mmap_addr(unsigned long size)
+{
+ return NULL;
+}
+
+void qemu_free(void *ptr)
+{
+ free(ptr);
+}
+
+void *qemu_malloc(size_t size)
+{
+ return malloc(size);
+}
+
+#endif
+
+/****************************************************************/
+/* printf support */
+
+static inline int qemu_isdigit(int c)
+{
+ return c >= '0' && c <= '9';
+}
+
+#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
+
+/* from BSD ppp sources */
+int qemu_vsnprintf(char *buf, int buflen, const char *fmt, va_list args)
+{
+ int c, i, n;
+ int width, prec, fillch;
+ int base, len, neg;
+ unsigned long val = 0;
+ const char *f;
+ char *str, *buf0;
+ char num[32];
+ static const char hexchars[] = "0123456789abcdef";
+
+ buf0 = buf;
+ --buflen;
+ while (buflen > 0) {
+ for (f = fmt; *f != '%' && *f != 0; ++f)
+ ;
+ if (f > fmt) {
+ len = f - fmt;
+ if (len > buflen)
+ len = buflen;
+ memcpy(buf, fmt, len);
+ buf += len;
+ buflen -= len;
+ fmt = f;
+ }
+ if (*fmt == 0)
+ break;
+ c = *++fmt;
+ width = prec = 0;
+ fillch = ' ';
+ if (c == '0') {
+ fillch = '0';
+ c = *++fmt;
+ }
+ if (c == '*') {
+ width = va_arg(args, int);
+ c = *++fmt;
+ } else {
+ while (qemu_isdigit(c)) {
+ width = width * 10 + c - '0';
+ c = *++fmt;
+ }
+ }
+ if (c == '.') {
+ c = *++fmt;
+ if (c == '*') {
+ prec = va_arg(args, int);
+ c = *++fmt;
+ } else {
+ while (qemu_isdigit(c)) {
+ prec = prec * 10 + c - '0';
+ c = *++fmt;
+ }
+ }
+ }
+ /* modifiers */
+ switch(c) {
+ case 'l':
+ c = *++fmt;
+ break;
+ default:
+ break;
+ }
+ str = 0;
+ base = 0;
+ neg = 0;
+ ++fmt;
+ switch (c) {
+ case 'd':
+ i = va_arg(args, int);
+ if (i < 0) {
+ neg = 1;
+ val = -i;
+ } else
+ val = i;
+ base = 10;
+ break;
+ case 'o':
+ val = va_arg(args, unsigned int);
+ base = 8;
+ break;
+ case 'x':
+ case 'X':
+ val = va_arg(args, unsigned int);
+ base = 16;
+ break;
+ case 'p':
+ val = (unsigned long) va_arg(args, void *);
+ base = 16;
+ neg = 2;
+ break;
+ case 's':
+ str = va_arg(args, char *);
+ break;
+ case 'c':
+ num[0] = va_arg(args, int);
+ num[1] = 0;
+ str = num;
+ break;
+ default:
+ *buf++ = '%';
+ if (c != '%')
+ --fmt; /* so %z outputs %z etc. */
+ --buflen;
+ continue;
+ }
+ if (base != 0) {
+ str = num + sizeof(num);
+ *--str = 0;
+ while (str > num + neg) {
+ *--str = hexchars[val % base];
+ val = val / base;
+ if (--prec <= 0 && val == 0)
+ break;
+ }
+ switch (neg) {
+ case 1:
+ *--str = '-';
+ break;
+ case 2:
+ *--str = 'x';
+ *--str = '0';
+ break;
+ }
+ len = num + sizeof(num) - 1 - str;
+ } else {
+ len = strlen(str);
+ if (prec > 0 && len > prec)
+ len = prec;
+ }
+ if (width > 0) {
+ if (width > buflen)
+ width = buflen;
+ if ((n = width - len) > 0) {
+ buflen -= n;
+ for (; n > 0; --n)
+ *buf++ = fillch;
+ }
+ }
+ if (len > buflen)
+ len = buflen;
+ memcpy(buf, str, len);
+ buf += len;
+ buflen -= len;
+ }
+ *buf = 0;
+ return buf - buf0;
+}
+
+void qemu_vprintf(const char *fmt, va_list ap)
+{
+ char buf[1024];
+ int len;
+
+ len = qemu_vsnprintf(buf, sizeof(buf), fmt, ap);
+ qemu_write(1, buf, len);
+}
+
+void qemu_printf(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ qemu_vprintf(fmt, ap);
+ va_end(ap);
+}
+
