[qemu.git] / osdep.c

/*
 * 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 <errno.h>
#include <unistd.h>

#include "cpu.h"
#if defined(USE_KQEMU)
#include "vl.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; \
}

#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;
}

/****************************************************************/
/* sigaction bypassing the threads */

static int kernel_sigaction(int signum, const struct qemu_sigaction *act, 
                            struct qemu_sigaction *oldact, 
                            int sigsetsize)
{
    QEMU_SYSCALL4(rt_sigaction, signum, act, oldact, sigsetsize);
}

int qemu_sigaction(int signum, const struct qemu_sigaction *act, 
                   struct qemu_sigaction *oldact)
{
    return kernel_sigaction(signum, act, oldact, 8);
}

/****************************************************************/
/* 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;

    if (!ptr)
        return;
    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

#ifdef _WIN32
#include <windows.h>
#elif defined(_BSD)
#include <stdlib.h>
#else
#include <malloc.h>
#endif

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);
}

#if defined(_WIN32)

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. */
    return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
}

void qemu_vfree(void *ptr)
{
    VirtualFree(ptr, 0, MEM_RELEASE);
}

#else

#if defined(USE_KQEMU)

#include <sys/vfs.h>
#include <sys/mman.h>
#include <fcntl.h>

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);
    }
    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);
    }
    phys_ram_size += size;
    return ptr;
}

void kqemu_vfree(void *ptr)
{
    /* may be useful some day, but currently we do not need to free */
}

#endif

/* 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
}

void qemu_vfree(void *ptr)
{
#if defined(USE_KQEMU)
    if (kqemu_allowed)
        kqemu_vfree(ptr);
#endif
    free(ptr);
}

#endif

#endif

void *qemu_mallocz(size_t size)
{
    void *ptr;
    ptr = qemu_malloc(size);
    if (!ptr)
        return NULL;
    memset(ptr, 0, size);
    return ptr;
}

char *qemu_strdup(const char *str)
{
    char *ptr;
    ptr = qemu_malloc(strlen(str) + 1);
    if (!ptr)
        return NULL;
    strcpy(ptr, str);
    return ptr;
}

/****************************************************************/
/* 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);
}
Commit	Line	Data
ea88812f FB	1	/*
	2	* QEMU low level functions
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24	#include <stdlib.h>
	25	#include <stdio.h>
	26	#include <stdarg.h>
	27	#include <string.h>
ea88812f FB	28	#include <errno.h>
	29	#include <unistd.h>
	30
	31	#include "cpu.h"
6cb7ee85 PB	32	#if defined(USE_KQEMU)
	33	#include "vl.h"
	34	#endif
ea88812f FB	35
	36	#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
	37
67b915a5 FB	38	#include <sys/mman.h>
	39	#include <sys/ipc.h>
	40
ea88812f FB	41	/* When not using soft mmu, libc independant functions are needed for
	42	the CPU core because it needs to use alternates stacks and
	43	libc/thread incompatibles settings */
	44
	45	#include <linux/unistd.h>
	46
	47	#define QEMU_SYSCALL0(name) \
	48	{ \
	49	long __res; \
	50	__asm__ volatile ("int $0x80" \
	51	: "=a" (__res) \
	52	: "0" (__NR_##name)); \
	53	return __res; \
	54	}
	55
	56	#define QEMU_SYSCALL1(name,arg1) \
	57	{ \
	58	long __res; \
	59	__asm__ volatile ("int $0x80" \
	60	: "=a" (__res) \
	61	: "0" (__NR_##name),"b" ((long)(arg1))); \
	62	return __res; \
	63	}
	64
	65	#define QEMU_SYSCALL2(name,arg1,arg2) \
	66	{ \
	67	long __res; \
	68	__asm__ volatile ("int $0x80" \
	69	: "=a" (__res) \
	70	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
	71	return __res; \
	72	}
	73
	74	#define QEMU_SYSCALL3(name,arg1,arg2,arg3) \
	75	{ \
	76	long __res; \
	77	__asm__ volatile ("int $0x80" \
	78	: "=a" (__res) \
	79	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
	80	"d" ((long)(arg3))); \
	81	return __res; \
	82	}
	83
	84	#define QEMU_SYSCALL4(name,arg1,arg2,arg3,arg4) \
	85	{ \
	86	long __res; \
	87	__asm__ volatile ("int $0x80" \
	88	: "=a" (__res) \
	89	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
	90	"d" ((long)(arg3)),"S" ((long)(arg4))); \
	91	return __res; \
	92	}
	93
	94	#define QEMU_SYSCALL5(name,arg1,arg2,arg3,arg4,arg5) \
	95	{ \
	96	long __res; \
	97	__asm__ volatile ("int $0x80" \
	98	: "=a" (__res) \
	99	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
	100	"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
	101	return __res; \
	102	}
	103
	104	#define QEMU_SYSCALL6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
105	{ \
106	long __res; \
107	__asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; int $0x80 ; pop %%ebp" \
108	: "=a" (__res) \
109	: "i" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
110	"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)), \
111	"0" ((long)(arg6))); \
112	return __res; \
113	}
114
115	int qemu_write(int fd, const void *buf, size_t n)
116	{
117	QEMU_SYSCALL3(write, fd, buf, n);
118	}
119
120
121
122	/****************************************************************/
123	/* shmat replacement */
124
125	int qemu_ipc(int call, unsigned long first,
126	unsigned long second, unsigned long third,
127	void *ptr, unsigned long fifth)
128	{
129	QEMU_SYSCALL6(ipc, call, first, second, third, ptr, fifth);
130	}
131
132	#define SHMAT 21
133
134	/* we must define shmat so that a specific address will be used when
135	mapping the X11 ximage */
136	void shmat(int shmid, const void shmaddr, int shmflg)
137	{
138	void *ptr;
139	int ret;
140	/* we give an address in the right memory area */
141	if (!shmaddr)
142	shmaddr = get_mmap_addr(8192 * 1024);
143	ret = qemu_ipc(SHMAT, shmid, shmflg, (unsigned long)&ptr, (void *)shmaddr, 0);
144	if (ret < 0)
145	return NULL;
146	return ptr;
147	}
148
d2bfb39a FB	149	/****************************************************************/
	150	/* sigaction bypassing the threads */
	151
	152	static int kernel_sigaction(int signum, const struct qemu_sigaction *act,
	153	struct qemu_sigaction *oldact,
	154	int sigsetsize)
	155	{
	156	QEMU_SYSCALL4(rt_sigaction, signum, act, oldact, sigsetsize);
	157	}
	158
	159	int qemu_sigaction(int signum, const struct qemu_sigaction *act,
	160	struct qemu_sigaction *oldact)
	161	{
	162	return kernel_sigaction(signum, act, oldact, 8);
	163	}
	164
ea88812f FB	165	/****************************************************************/
	166	/* memory allocation */
	167
	168	//#define DEBUG_MALLOC
	169
	170	#define MALLOC_BASE 0xab000000
	171	#define PHYS_RAM_BASE 0xac000000
	172
	173	#define MALLOC_ALIGN 16
	174	#define BLOCK_HEADER_SIZE 16
	175
	176	typedef struct MemoryBlock {
	177	struct MemoryBlock *next;
	178	unsigned long size; /* size of block, including header */
	179	} MemoryBlock;
	180
	181	static MemoryBlock *first_free_block;
	182	static unsigned long malloc_addr = MALLOC_BASE;
	183
	184	static void *malloc_get_space(size_t size)
	185	{
	186	void *ptr;
	187	size = TARGET_PAGE_ALIGN(size);
	188	ptr = mmap((void *)malloc_addr, size,
	189	PROT_WRITE \| PROT_READ,
	190	MAP_PRIVATE \| MAP_FIXED \| MAP_ANON, -1, 0);
	191	if (ptr == MAP_FAILED)
	192	return NULL;
	193	malloc_addr += size;
	194	return ptr;
	195	}
	196
	197	void *qemu_malloc(size_t size)
	198	{
	199	MemoryBlock mb, mb1, **pmb;
	200	void *ptr;
	201	size_t size1, area_size;
	202
	203	if (size == 0)
	204	return NULL;
	205
	206	size = (size + BLOCK_HEADER_SIZE + MALLOC_ALIGN - 1) & ~(MALLOC_ALIGN - 1);
	207	pmb = &first_free_block;
	208	for(;;) {
	209	mb = *pmb;
	210	if (mb == NULL)
	211	break;
	212	if (size <= mb->size)
	213	goto found;
	214	pmb = &mb->next;
	215	}
	216	/* no big enough blocks found: get new space */
	217	area_size = TARGET_PAGE_ALIGN(size);
	218	mb = malloc_get_space(area_size);
	219	if (!mb)
	220	return NULL;
	221	size1 = area_size - size;
	222	if (size1 > 0) {
	223	/* create a new free block */
	224	mb1 = (MemoryBlock )((uint8_t )mb + size);
	225	mb1->next = NULL;
	226	mb1->size = size1;
	227	*pmb = mb1;
	228	}
229	goto the_end;
230	found:
231	/* a free block was found: use it */
232	size1 = mb->size - size;
233	if (size1 > 0) {
234	/* create a new free block */
235	mb1 = (MemoryBlock )((uint8_t )mb + size);
236	mb1->next = mb->next;
237	mb1->size = size1;
238	*pmb = mb1;
239	} else {
240	/* suppress the first block */
241	*pmb = mb->next;
242	}
243	the_end:
244	mb->size = size;
245	mb->next = NULL;
246	ptr = ((uint8_t *)mb + BLOCK_HEADER_SIZE);
247	#ifdef DEBUG_MALLOC
248	qemu_printf("malloc: size=0x%x ptr=0x%lx\n", size, (unsigned long)ptr);
249	#endif
250	return ptr;
251	}
252
253	void qemu_free(void *ptr)
254	{
255	MemoryBlock *mb;
256
57c30724 FB	257	if (!ptr)
57c30724 FB	258	return;
ea88812f FB	259	mb = (MemoryBlock )((uint8_t )ptr - BLOCK_HEADER_SIZE);
	260	mb->next = first_free_block;
	261	first_free_block = mb;
	262	}
	263
	264	/****************************************************************/
	265	/* virtual memory allocation */
	266
	267	unsigned long mmap_addr = PHYS_RAM_BASE;
	268
	269	void *get_mmap_addr(unsigned long size)
	270	{
	271	unsigned long addr;
	272	addr = mmap_addr;
	273	mmap_addr += ((size + 4095) & ~4095) + 4096;
	274	return (void *)addr;
	275	}
	276
	277	#else
	278
6e4255f6 FB	279	#ifdef _WIN32
	280	#include <windows.h>
	281	#elif defined(_BSD)
194884dd FB	282	#include <stdlib.h>
194884dd FB	283	#else
49b470eb	284	#include <malloc.h>
194884dd	285	#endif
49b470eb	286
ea88812f FB	287	int qemu_write(int fd, const void *buf, size_t n)
	288	{
	289	int ret;
	290	ret = write(fd, buf, n);
	291	if (ret < 0)
	292	return -errno;
	293	else
	294	return ret;
	295	}
	296
	297	void *get_mmap_addr(unsigned long size)
	298	{
	299	return NULL;
	300	}
	301
	302	void qemu_free(void *ptr)
	303	{
	304	free(ptr);
	305	}
	306
	307	void *qemu_malloc(size_t size)
	308	{
	309	return malloc(size);
	310	}
	311
6e4255f6 FB	312	#if defined(_WIN32)
	313
	314	void *qemu_vmalloc(size_t size)
	315	{
	316	/* FIXME: this is not exactly optimal solution since VirtualAlloc
	317	has 64Kb granularity, but at least it guarantees us that the
	318	memory is page aligned. */
	319	return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
	320	}
	321
	322	void qemu_vfree(void *ptr)
	323	{
	324	VirtualFree(ptr, 0, MEM_RELEASE);
	325	}
	326
6cb7ee85 PB	327	#else
	328
	329	#if defined(USE_KQEMU)
49b470eb	330
6bae7ed8	331	#include <sys/vfs.h>
49b470eb FB	332	#include <sys/mman.h>
	333	#include <fcntl.h>
	334
6cb7ee85	335	void *kqemu_vmalloc(size_t size)
49b470eb FB	336	{
	337	static int phys_ram_fd = -1;
	338	static int phys_ram_size = 0;
	339	const char *tmpdir;
	340	char phys_ram_file[1024];
	341	void *ptr;
6bae7ed8	342	struct statfs stfs;
49b470eb FB	343
	344	if (phys_ram_fd < 0) {
	345	tmpdir = getenv("QEMU_TMPDIR");
	346	if (!tmpdir)
	347	tmpdir = "/dev/shm";
6bae7ed8 FB	348	if (statfs(tmpdir, &stfs) == 0) {
	349	int64_t free_space;
	350	int ram_mb;
	351
	352	extern int ram_size;
	353	free_space = (int64_t)stfs.f_bavail * stfs.f_bsize;
	354	if ((ram_size + 8192 * 1024) >= free_space) {
	355	ram_mb = (ram_size / (1024 * 1024));
	356	fprintf(stderr,
	357	"You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
	358	tmpdir, ram_mb);
	359	if (strcmp(tmpdir, "/dev/shm") == 0) {
	360	fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
	361	"umount /dev/shm\n"
	362	"mount -t tmpfs -o size=%dm none /dev/shm\n",
	363	ram_mb + 16);
	364	} else {
	365	fprintf(stderr,
	366	"Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
	367	"QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
	368	"temporary RAM file will be opened.\n");
	369	}
6cb7ee85	370	fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
6bae7ed8 FB	371	exit(1);
	372	}
	373	}
49b470eb FB	374	snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
	375	tmpdir);
	376	if (mkstemp(phys_ram_file) < 0) {
	377	fprintf(stderr,
	378	"warning: could not create temporary file in '%s'.\n"
	379	"Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
	380	"Using '/tmp' as fallback.\n",
	381	tmpdir);
	382	snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
	383	"/tmp");
	384	if (mkstemp(phys_ram_file) < 0) {
	385	fprintf(stderr, "Could not create temporary memory file '%s'\n",
	386	phys_ram_file);
	387	exit(1);
	388	}
	389	}
	390	phys_ram_fd = open(phys_ram_file, O_CREAT \| O_TRUNC \| O_RDWR, 0600);
	391	if (phys_ram_fd < 0) {
	392	fprintf(stderr, "Could not open temporary memory file '%s'\n",
	393	phys_ram_file);
	394	exit(1);
	395	}
	396	unlink(phys_ram_file);
	397	}
	398	size = (size + 4095) & ~4095;
	399	ftruncate(phys_ram_fd, phys_ram_size + size);
	400	ptr = mmap(NULL,
	401	size,
	402	PROT_WRITE \| PROT_READ, MAP_SHARED,
	403	phys_ram_fd, phys_ram_size);
	404	if (ptr == MAP_FAILED) {
	405	fprintf(stderr, "Could not map physical memory\n");
	406	exit(1);
	407	}
	408	phys_ram_size += size;
	409	return ptr;
	410	}
	411
6cb7ee85	412	void kqemu_vfree(void *ptr)
49b470eb FB	413	{
	414	/* may be useful some day, but currently we do not need to free */
	415	}
	416
6cb7ee85	417	#endif
49b470eb FB	418
	419	/* alloc shared memory pages */
	420	void *qemu_vmalloc(size_t size)
	421	{
6cb7ee85 PB	422	#if defined(USE_KQEMU)
	423	if (kqemu_allowed)
	424	return kqemu_vmalloc(size);
	425	#endif
49b470eb FB	426	#ifdef _BSD
	427	return valloc(size);
	428	#else
	429	return memalign(4096, size);
	430	#endif
	431	}
	432
	433	void qemu_vfree(void *ptr)
	434	{
6cb7ee85 PB	435	#if defined(USE_KQEMU)
	436	if (kqemu_allowed)
	437	kqemu_vfree(ptr);
	438	#endif
49b470eb FB	439	free(ptr);
	440	}
	441
	442	#endif
	443
ea88812f FB	444	#endif
ea88812f FB	445
07d89866 FB	446	void *qemu_mallocz(size_t size)
	447	{
	448	void *ptr;
	449	ptr = qemu_malloc(size);
	450	if (!ptr)
	451	return NULL;
	452	memset(ptr, 0, size);
	453	return ptr;
	454	}
	455
2571929a FB	456	char qemu_strdup(const char str)
	457	{
	458	char *ptr;
	459	ptr = qemu_malloc(strlen(str) + 1);
	460	if (!ptr)
	461	return NULL;
	462	strcpy(ptr, str);
	463	return ptr;
	464	}
	465
ea88812f FB	466	/****************************************************************/
	467	/* printf support */
	468
	469	static inline int qemu_isdigit(int c)
	470	{
	471	return c >= '0' && c <= '9';
	472	}
	473
	474	#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
	475
	476	/* from BSD ppp sources */
	477	int qemu_vsnprintf(char buf, int buflen, const char fmt, va_list args)
	478	{
	479	int c, i, n;
	480	int width, prec, fillch;
	481	int base, len, neg;
	482	unsigned long val = 0;
	483	const char *f;
	484	char str, buf0;
	485	char num[32];
	486	static const char hexchars[] = "0123456789abcdef";
	487
	488	buf0 = buf;
	489	--buflen;
	490	while (buflen > 0) {
	491	for (f = fmt; f != '%' && f != 0; ++f)
	492	;
	493	if (f > fmt) {
	494	len = f - fmt;
	495	if (len > buflen)
	496	len = buflen;
	497	memcpy(buf, fmt, len);
	498	buf += len;
	499	buflen -= len;
	500	fmt = f;
	501	}
	502	if (*fmt == 0)
	503	break;
	504	c = *++fmt;
	505	width = prec = 0;
	506	fillch = ' ';
	507	if (c == '0') {
	508	fillch = '0';
	509	c = *++fmt;
	510	}
	511	if (c == '*') {
	512	width = va_arg(args, int);
	513	c = *++fmt;
	514	} else {
	515	while (qemu_isdigit(c)) {
	516	width = width * 10 + c - '0';
	517	c = *++fmt;
	518	}
	519	}
	520	if (c == '.') {
	521	c = *++fmt;
	522	if (c == '*') {
	523	prec = va_arg(args, int);
	524	c = *++fmt;
	525	} else {
	526	while (qemu_isdigit(c)) {
	527	prec = prec * 10 + c - '0';
	528	c = *++fmt;
	529	}
530	}
531	}
532	/* modifiers */
533	switch(c) {
534	case 'l':
535	c = *++fmt;
536	break;
537	default:
538	break;
539	}
540	str = 0;
541	base = 0;
542	neg = 0;
543	++fmt;
544	switch (c) {
545	case 'd':
546	i = va_arg(args, int);
547	if (i < 0) {
548	neg = 1;
549	val = -i;
550	} else
551	val = i;
552	base = 10;
553	break;
554	case 'o':
555	val = va_arg(args, unsigned int);
556	base = 8;
557	break;
558	case 'x':
559	case 'X':
560	val = va_arg(args, unsigned int);
561	base = 16;
562	break;
563	case 'p':
564	val = (unsigned long) va_arg(args, void *);
565	base = 16;
566	neg = 2;
567	break;
568	case 's':
569	str = va_arg(args, char *);
570	break;
571	case 'c':
572	num[0] = va_arg(args, int);
573	num[1] = 0;
574	str = num;
575	break;
576	default:
577	*buf++ = '%';
578	if (c != '%')
579	--fmt; /* so %z outputs %z etc. */
580	--buflen;
581	continue;
582	}
583	if (base != 0) {
584	str = num + sizeof(num);
585	*--str = 0;
586	while (str > num + neg) {
587	*--str = hexchars[val % base];
588	val = val / base;
589	if (--prec <= 0 && val == 0)
590	break;
591	}
592	switch (neg) {
593	case 1:
594	*--str = '-';
595	break;
596	case 2:
597	*--str = 'x';
598	*--str = '0';
599	break;
600	}
601	len = num + sizeof(num) - 1 - str;
602	} else {
603	len = strlen(str);
604	if (prec > 0 && len > prec)
605	len = prec;
606	}
607	if (width > 0) {
608	if (width > buflen)
609	width = buflen;
610	if ((n = width - len) > 0) {
611	buflen -= n;
612	for (; n > 0; --n)
613	*buf++ = fillch;
614	}
615	}
616	if (len > buflen)
617	len = buflen;
618	memcpy(buf, str, len);
619	buf += len;
620	buflen -= len;
621	}
622	*buf = 0;
623	return buf - buf0;
624	}
625
626	void qemu_vprintf(const char *fmt, va_list ap)
627	{
628	char buf[1024];
629	int len;
630
631	len = qemu_vsnprintf(buf, sizeof(buf), fmt, ap);
632	qemu_write(1, buf, len);
633	}
634
635	void qemu_printf(const char *fmt, ...)
636	{
637	va_list ap;
638	va_start(ap, fmt);
639	qemu_vprintf(fmt, ap);
640	va_end(ap);
641	}
642