/*
* 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
#include <string.h>
#include <errno.h>
#include <unistd.h>
-
-#include "cpu.h"
-#if defined(USE_KQEMU)
-#include "vl.h"
+#include <fcntl.h>
+#ifdef CONFIG_SOLARIS
+#include <sys/types.h>
+#include <sys/statvfs.h>
#endif
-#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
-
-#include <sys/mman.h>
-#include <sys/ipc.h>
-
-/* 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; \
-}
+/* Needed early for CONFIG_BSD etc. */
+#include "config-host.h"
-#define QEMU_SYSCALL1(name,arg1) \
-{ \
-long __res; \
-__asm__ volatile ("int $0x80" \
- : "=a" (__res) \
- : "0" (__NR_##name),"b" ((long)(arg1))); \
-return __res; \
-}
+#ifdef _WIN32
+#include <windows.h>
+#elif defined(CONFIG_BSD)
+#include <stdlib.h>
+#else
+#include <malloc.h>
+#endif
-#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; \
-}
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "qemu_socket.h"
-#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; \
+#if !defined(_POSIX_C_SOURCE) || defined(_WIN32) || defined(__sun__)
+static void *oom_check(void *ptr)
+{
+ if (ptr == NULL) {
+ abort();
+ }
+ return ptr;
}
+#endif
-#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; \
+#if defined(_WIN32)
+void *qemu_memalign(size_t alignment, size_t size)
+{
+ if (!size) {
+ abort();
+ }
+ return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
}
-#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; \
+void *qemu_vmalloc(size_t size)
+{
+ /* FIXME: this is not exactly optimal solution since VirtualAlloc
+ has 64Kb granularity, but at least it guarantees us that the
+ memory is page aligned. */
+ if (!size) {
+ abort();
+ }
+ return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
}
-/****************************************************************/
-/* shmat replacement */
-
-int qemu_ipc(int call, unsigned long first,
- unsigned long second, unsigned long third,
- void *ptr, unsigned long fifth)
+void qemu_vfree(void *ptr)
{
- QEMU_SYSCALL6(ipc, call, first, second, third, ptr, fifth);
+ VirtualFree(ptr, 0, MEM_RELEASE);
}
-#define SHMAT 21
+#else
-/* 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 *qemu_memalign(size_t alignment, size_t size)
{
- void *ptr;
+#if defined(_POSIX_C_SOURCE) && !defined(__sun__)
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;
+ void *ptr;
+ ret = posix_memalign(&ptr, alignment, size);
+ if (ret != 0)
+ abort();
return ptr;
+#elif defined(CONFIG_BSD)
+ return oom_check(valloc(size));
+#else
+ return oom_check(memalign(alignment, size));
+#endif
}
-/****************************************************************/
-/* sigaction bypassing the threads */
-
-static int kernel_sigaction(int signum, const struct qemu_sigaction *act,
- struct qemu_sigaction *oldact,
- int sigsetsize)
+/* alloc shared memory pages */
+void *qemu_vmalloc(size_t size)
{
- QEMU_SYSCALL4(rt_sigaction, signum, act, oldact, sigsetsize);
+ return qemu_memalign(getpagesize(), size);
}
-int qemu_sigaction(int signum, const struct qemu_sigaction *act,
- struct qemu_sigaction *oldact)
+void qemu_vfree(void *ptr)
{
- return kernel_sigaction(signum, act, oldact, 8);
+ free(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;
+#endif
-static void *malloc_get_space(size_t size)
+int qemu_create_pidfile(const char *filename)
{
- 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;
-}
+ char buffer[128];
+ int len;
+#ifndef _WIN32
+ int fd;
-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;
-}
+ fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
+ if (fd == -1)
+ return -1;
-void qemu_free(void *ptr)
-{
- MemoryBlock *mb;
+ if (lockf(fd, F_TLOCK, 0) == -1)
+ return -1;
- if (!ptr)
- return;
- mb = (MemoryBlock *)((uint8_t *)ptr - BLOCK_HEADER_SIZE);
- mb->next = first_free_block;
- first_free_block = mb;
+ len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
+ if (write(fd, buffer, len) != len)
+ return -1;
+#else
+ HANDLE file;
+ OVERLAPPED overlap;
+ BOOL ret;
+ memset(&overlap, 0, sizeof(overlap));
+
+ file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
+ OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+
+ if (file == INVALID_HANDLE_VALUE)
+ return -1;
+
+ len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
+ ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
+ &overlap, NULL);
+ if (ret == 0)
+ return -1;
+#endif
+ return 0;
}
-/****************************************************************/
-/* virtual memory allocation */
+#ifdef _WIN32
-unsigned long mmap_addr = PHYS_RAM_BASE;
+/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
+#define _W32_FT_OFFSET (116444736000000000ULL)
-void *get_mmap_addr(unsigned long size)
+int qemu_gettimeofday(qemu_timeval *tp)
{
- unsigned long addr;
- addr = mmap_addr;
- mmap_addr += ((size + 4095) & ~4095) + 4096;
- return (void *)addr;
+ union {
+ unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
+ FILETIME ft;
+ } _now;
+
+ if(tp)
+ {
+ GetSystemTimeAsFileTime (&_now.ft);
+ tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
+ tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
+ }
+ /* Always return 0 as per Open Group Base Specifications Issue 6.
+ Do not set errno on error. */
+ return 0;
}
+#endif /* _WIN32 */
-#else
#ifdef _WIN32
-#include <windows.h>
-#elif defined(_BSD)
-#include <stdlib.h>
-#else
-#include <malloc.h>
-#endif
-
-void *get_mmap_addr(unsigned long size)
+void socket_set_nonblock(int fd)
{
- return NULL;
+ unsigned long opt = 1;
+ ioctlsocket(fd, FIONBIO, &opt);
}
-void qemu_free(void *ptr)
+int inet_aton(const char *cp, struct in_addr *ia)
{
- free(ptr);
+ uint32_t addr = inet_addr(cp);
+ if (addr == 0xffffffff)
+ return 0;
+ ia->s_addr = addr;
+ return 1;
}
-void *qemu_malloc(size_t size)
+void qemu_set_cloexec(int fd)
{
- return malloc(size);
}
-#if defined(_WIN32)
+#else
-void *qemu_vmalloc(size_t size)
+void socket_set_nonblock(int fd)
{
- /* FIXME: this is not exactly optimal solution since VirtualAlloc
- has 64Kb granularity, but at least it guarantees us that the
- memory is page aligned. */
- return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
+ int f;
+ f = fcntl(fd, F_GETFL);
+ fcntl(fd, F_SETFL, f | O_NONBLOCK);
}
-void qemu_vfree(void *ptr)
+void qemu_set_cloexec(int fd)
{
- VirtualFree(ptr, 0, MEM_RELEASE);
+ int f;
+ f = fcntl(fd, F_GETFD);
+ fcntl(fd, F_SETFD, f | FD_CLOEXEC);
}
-#else
+#endif
-#if defined(USE_KQEMU)
+/*
+ * Opens a file with FD_CLOEXEC set
+ */
+int qemu_open(const char *name, int flags, ...)
+{
+ int ret;
+ int mode = 0;
-#include <sys/vfs.h>
-#include <sys/mman.h>
-#include <fcntl.h>
+ if (flags & O_CREAT) {
+ va_list ap;
-void *kqemu_vmalloc(size_t size)
-{
- static int phys_ram_fd = -1;
- static int phys_ram_size = 0;
- const char *tmpdir;
- char phys_ram_file[1024];
- void *ptr;
- struct statfs stfs;
-
- if (phys_ram_fd < 0) {
- tmpdir = getenv("QEMU_TMPDIR");
- if (!tmpdir)
- tmpdir = "/dev/shm";
- if (statfs(tmpdir, &stfs) == 0) {
- int64_t free_space;
- int ram_mb;
-
- extern int ram_size;
- free_space = (int64_t)stfs.f_bavail * stfs.f_bsize;
- if ((ram_size + 8192 * 1024) >= free_space) {
- ram_mb = (ram_size / (1024 * 1024));
- fprintf(stderr,
- "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
- tmpdir, ram_mb);
- if (strcmp(tmpdir, "/dev/shm") == 0) {
- fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
- "umount /dev/shm\n"
- "mount -t tmpfs -o size=%dm none /dev/shm\n",
- ram_mb + 16);
- } else {
- fprintf(stderr,
- "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
- "QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
- "temporary RAM file will be opened.\n");
- }
- fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
- exit(1);
- }
- }
- snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
- tmpdir);
- if (mkstemp(phys_ram_file) < 0) {
- fprintf(stderr,
- "warning: could not create temporary file in '%s'.\n"
- "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
- "Using '/tmp' as fallback.\n",
- tmpdir);
- snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
- "/tmp");
- if (mkstemp(phys_ram_file) < 0) {
- fprintf(stderr, "Could not create temporary memory file '%s'\n",
- phys_ram_file);
- exit(1);
- }
- }
- phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600);
- if (phys_ram_fd < 0) {
- fprintf(stderr, "Could not open temporary memory file '%s'\n",
- phys_ram_file);
- exit(1);
- }
- unlink(phys_ram_file);
+ va_start(ap, flags);
+ mode = va_arg(ap, int);
+ va_end(ap);
}
- size = (size + 4095) & ~4095;
- ftruncate(phys_ram_fd, phys_ram_size + size);
- ptr = mmap(NULL,
- size,
- PROT_WRITE | PROT_READ, MAP_SHARED,
- phys_ram_fd, phys_ram_size);
- if (ptr == MAP_FAILED) {
- fprintf(stderr, "Could not map physical memory\n");
- exit(1);
+
+#ifdef O_CLOEXEC
+ ret = open(name, flags | O_CLOEXEC, mode);
+#else
+ ret = open(name, flags, mode);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
}
- phys_ram_size += size;
- return ptr;
+#endif
+
+ return ret;
}
-void kqemu_vfree(void *ptr)
+#ifndef _WIN32
+/*
+ * Creates a pipe with FD_CLOEXEC set on both file descriptors
+ */
+int qemu_pipe(int pipefd[2])
{
- /* may be useful some day, but currently we do not need to free */
-}
+ int ret;
+#ifdef CONFIG_PIPE2
+ ret = pipe2(pipefd, O_CLOEXEC);
+ if (ret != -1 || errno != ENOSYS) {
+ return ret;
+ }
#endif
+ ret = pipe(pipefd);
+ if (ret == 0) {
+ qemu_set_cloexec(pipefd[0]);
+ qemu_set_cloexec(pipefd[1]);
+ }
-/* alloc shared memory pages */
-void *qemu_vmalloc(size_t size)
-{
-#if defined(USE_KQEMU)
- if (kqemu_allowed)
- return kqemu_vmalloc(size);
-#endif
-#ifdef _BSD
- return valloc(size);
-#else
- return memalign(4096, size);
-#endif
+ return ret;
}
-
-void qemu_vfree(void *ptr)
-{
-#if defined(USE_KQEMU)
- if (kqemu_allowed)
- kqemu_vfree(ptr);
#endif
- free(ptr);
-}
-#endif
+/*
+ * Opens a socket with FD_CLOEXEC set
+ */
+int qemu_socket(int domain, int type, int protocol)
+{
+ int ret;
+#ifdef SOCK_CLOEXEC
+ ret = socket(domain, type | SOCK_CLOEXEC, protocol);
+ if (ret != -1 || errno != EINVAL) {
+ return ret;
+ }
#endif
+ ret = socket(domain, type, protocol);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
-void *qemu_mallocz(size_t size)
-{
- void *ptr;
- ptr = qemu_malloc(size);
- if (!ptr)
- return NULL;
- memset(ptr, 0, size);
- return ptr;
+ return ret;
}
-char *qemu_strdup(const char *str)
+/*
+ * Accept a connection and set FD_CLOEXEC
+ */
+int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
{
- char *ptr;
- ptr = qemu_malloc(strlen(str) + 1);
- if (!ptr)
- return NULL;
- strcpy(ptr, str);
- return ptr;
+ int ret;
+
+#ifdef CONFIG_ACCEPT4
+ ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
+ if (ret != -1 || errno != ENOSYS) {
+ return ret;
+ }
+#endif
+ ret = accept(s, addr, addrlen);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
+
+ return ret;
}
projects / qemu.git / blobdiff