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mac.c
1446 lines (1258 loc) · 41.1 KB
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mac.c
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// Copyright 2011 Shinichiro Hamaji. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials
// provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY Shinichiro Hamaji ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Shinichiro Hamaji OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
// Emulation for functions in Mac.
#define _GNU_SOURCE
#include <dirent.h>
#include <err.h>
#include <locale.h>
#include <pthread.h>
#include <signal.h>
#include <spawn.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/vfs.h>
#include <time.h>
#include <unistd.h>
#include <mac-ctype.h>
#include <runetype.h>
#ifdef NOLOG
# define LOGF(...) if (0) fprintf(stderr, __VA_ARGS__)
#else
int LIBMAC_LOG;
# define LOGF(...) if (LIBMAC_LOG) fprintf(stderr, __VA_ARGS__)
#endif
typedef __darwin_rune_t rune_t;
typedef int __darwin_ct_rune_t; /* ct_rune_t */
#define _INVALID_RUNE _DefaultRuneLocale.__invalid_rune
#include "errno.c"
#include "none.c"
#include "popcountdi2.c"
#include "runetable.c"
#include "stack_protector-obsd.c"
struct __darwin_timespec {
time_t tv_sec;
long tv_nsec;
};
typedef int32_t __darwin_dev_t;
typedef uint16_t __darwin_mode_t;
typedef uint16_t __darwin_nlink_t;
typedef uint64_t __darwin_ino64_t;
typedef uint32_t __darwin_uid_t;
typedef uint32_t __darwin_gid_t;
// From /usr/include/sys/stat.h
struct __darwin_stat64 {
__darwin_dev_t st_dev;
__darwin_mode_t st_mode;
__darwin_nlink_t st_nlink;
__darwin_ino64_t st_ino;
__darwin_uid_t st_uid;
__darwin_gid_t st_gid;
__darwin_dev_t st_rdev;
struct __darwin_timespec st_atimespec;
struct __darwin_timespec st_mtimespec;
struct __darwin_timespec st_ctimespec;
struct __darwin_timespec st_birthtimespec;
off_t st_size;
// TODO(hamaji): the size is not checked after this field.
blkcnt_t st_blocks;
blksize_t st_blksize;
__uint32_t st_flags;
__uint32_t st_gen;
__int32_t st_lspare;
__int64_t st_qspare[2];
};
struct __darwin_stat {
__darwin_dev_t st_dev;
uint32_t st_ino;
__darwin_mode_t st_mode;
__darwin_nlink_t st_nlink;
__darwin_uid_t st_uid;
__darwin_gid_t st_gid;
__darwin_dev_t st_rdev;
struct __darwin_timespec st_atimespec;
struct __darwin_timespec st_mtimespec;
struct __darwin_timespec st_ctimespec;
off_t st_size;
// TODO(hamaji): the size is not checked after this field.
blkcnt_t st_blocks;
blksize_t st_blksize;
__uint32_t st_flags;
__uint32_t st_gen;
__int32_t st_lspare;
__int64_t st_qspare[2];
};
static void __translate_stat64(struct stat64* linux_buf,
struct __darwin_stat64* mac) {
// TODO(hamaji): this memset seems to cause overflow... why?
//memset(mac, 0, sizeof(*mac));
mac->st_dev = linux_buf->st_dev;
mac->st_mode = linux_buf->st_mode;
mac->st_nlink = linux_buf->st_nlink;
mac->st_ino = linux_buf->st_ino;
mac->st_uid = linux_buf->st_uid;
mac->st_gid = linux_buf->st_gid;
mac->st_rdev = linux_buf->st_rdev;
mac->st_size = linux_buf->st_size;
mac->st_blksize = linux_buf->st_blksize;
mac->st_blocks = linux_buf->st_blocks;
mac->st_atimespec.tv_sec = linux_buf->st_atime;
mac->st_mtimespec.tv_sec = linux_buf->st_mtime;
mac->st_ctimespec.tv_sec = linux_buf->st_ctime;
}
static void __translate_stat(struct stat64* linux_buf,
struct __darwin_stat* mac) {
// TODO(hamaji): this memset seems to cause overflow... why?
//memset(mac, 0, sizeof(*mac));
mac->st_dev = linux_buf->st_dev;
mac->st_mode = linux_buf->st_mode;
mac->st_nlink = linux_buf->st_nlink;
mac->st_ino = linux_buf->st_ino;
mac->st_uid = linux_buf->st_uid;
mac->st_gid = linux_buf->st_gid;
mac->st_rdev = linux_buf->st_rdev;
mac->st_size = linux_buf->st_size;
mac->st_blksize = linux_buf->st_blksize;
mac->st_blocks = linux_buf->st_blocks;
mac->st_atimespec.tv_sec = linux_buf->st_atime;
mac->st_mtimespec.tv_sec = linux_buf->st_mtime;
mac->st_ctimespec.tv_sec = linux_buf->st_ctime;
}
int __darwin_stat64(const char* path, struct __darwin_stat64* mac) {
LOGF("stat64: path=%s buf=%p\n", path, mac);
struct stat64 linux_buf;
int ret = stat64(path, &linux_buf);
__translate_stat64(&linux_buf, mac);
return ret;
}
int __darwin_fstat64(int fd, struct __darwin_stat64* mac) {
LOGF("fstat64: fd=%d buf=%p\n", fd, mac);
LOGF("fstat: size_offset=%d\n", (int)((char*)&mac->st_size - (char*)mac));
struct stat64 linux_buf;
int ret = fstat64(fd, &linux_buf);
__translate_stat64(&linux_buf, mac);
return ret;
}
int __darwin_lstat64(const char* path, struct __darwin_stat64* mac) {
LOGF("lstat64: path=%s buf=%p\n", path, mac);
struct stat64 linux_buf;
int ret = lstat64(path, &linux_buf);
__translate_stat64(&linux_buf, mac);
return ret;
}
int __darwin_stat(const char* path, struct __darwin_stat* mac) {
LOGF("stat: path=%s buf=%p\n", path, mac);
struct stat64 linux_buf;
int ret = stat64(path, &linux_buf);
__translate_stat(&linux_buf, mac);
return ret;
}
int __darwin_fstat(int fd, struct __darwin_stat* mac) {
LOGF("fstat: fd=%d buf=%p\n", fd, mac);
LOGF("fstat: size_offset=%d\n", (int)((char*)&mac->st_size - (char*)mac));
struct stat64 linux_buf;
int ret = fstat64(fd, &linux_buf);
__translate_stat(&linux_buf, mac);
return ret;
}
int __darwin_lstat(const char* path, struct __darwin_stat* mac) {
LOGF("lstat: path=%s buf=%p\n", path, mac);
struct stat64 linux_buf;
int ret = lstat64(path, &linux_buf);
__translate_stat(&linux_buf, mac);
return ret;
}
// From /usr/include/sys/dirent.h
#define __DARWIN_MAXPATHLEN 1024
struct __darwin_dirent64 {
uint64_t d_ino;
uint64_t d_seekoff;
uint16_t d_reclen;
uint16_t d_namlen;
uint8_t d_type;
char d_name[__DARWIN_MAXPATHLEN];
};
#define __DARWIN_MAXNAMLEN 255
struct __darwin_dirent {
uint32_t d_ino;
uint16_t d_reclen;
uint8_t d_type;
uint8_t d_namlen;
char d_name[__DARWIN_MAXNAMLEN + 1];
};
struct __darwin_dirent64* __darwin_readdir64(DIR* dirp) {
static struct __darwin_dirent64 mac;
struct dirent* linux_buf = readdir(dirp);
if (!linux_buf) {
return NULL;
}
mac.d_ino = linux_buf->d_ino;
mac.d_reclen = linux_buf->d_reclen;
mac.d_type = linux_buf->d_type;
mac.d_namlen = strlen(linux_buf->d_name);
// TODO(hamaji): I hope this won't be used.
mac.d_seekoff = 0;
strcpy(mac.d_name, linux_buf->d_name);
LOGF("readdir64: %s\n", mac.d_name);
return &mac;
}
struct __darwin_dirent* __darwin_readdir(DIR* dirp) {
static struct __darwin_dirent mac;
struct dirent* linux_buf = readdir(dirp);
if (!linux_buf) {
return NULL;
}
mac.d_ino = linux_buf->d_ino;
mac.d_reclen = linux_buf->d_reclen;
mac.d_type = linux_buf->d_type;
mac.d_namlen = strlen(linux_buf->d_name);
strcpy(mac.d_name, linux_buf->d_name);
LOGF("readdir: %s\n", mac.d_name);
return &mac;
}
// From /usr/include/sys/mount.h
#define __DARWIN_MFSNAMELEN 15
#define __DARWIN_MFSTYPENAMELEN 16
// assume __DARWIN_64_BIT_INO_T is false.
#define __DARWIN_MNAMELEN 90
struct __darwin_fsid { int32_t val[2]; };
struct __darwin_statfs64 {
uint32_t f_bsize;
int32_t f_iosize;
uint64_t f_blocks;
uint64_t f_bfree;
uint64_t f_bavail;
uint64_t f_files;
uint64_t f_ffree;
struct __darwin_fsid f_fsid;
__darwin_uid_t f_owner;
uint32_t f_type;
uint32_t f_flags;
uint32_t f_fssubtype;
char f_fstypename[__DARWIN_MFSTYPENAMELEN];
char f_mntonname[__DARWIN_MAXPATHLEN];
char f_mntfromname[__DARWIN_MAXPATHLEN];
uint32_t f_reserved[8];
};
static void __translate_statfs64(struct statfs64* linux_buf,
struct __darwin_statfs64* mac) {
memset(mac, 0, sizeof(*mac));
mac->f_iosize = linux_buf->f_bsize;
mac->f_blocks = linux_buf->f_blocks;
mac->f_bfree = linux_buf->f_bfree;
mac->f_bavail = linux_buf->f_bavail;
mac->f_files = linux_buf->f_files;
mac->f_ffree = linux_buf->f_ffree;
mac->f_type = linux_buf->f_type;
memcpy(&mac->f_fsid, &linux_buf->f_fsid, sizeof(mac->f_fsid));
// Followings are just ignored:
// f_bsize, f_owner, f_flags, f_fssubtype, f_fstypename, f_mntonname,
// f_mntfromname.
}
int __darwin_statfs64(const char* path, struct __darwin_statfs64* mac) {
LOGF("statfs64: path=%s buf=%p\n", path, mac);
struct statfs64 linux_buf;
int ret = statfs64(path, &linux_buf);
if (ret == 0)
__translate_statfs64(&linux_buf, mac);
return ret;
}
int __darwin_fstatfs64(int fd, struct __darwin_statfs64* mac) {
LOGF("fstatfs64: fd=%d buf=%p\n", fd, mac);
struct statfs64 linux_buf;
int ret = fstatfs64(fd, &linux_buf);
if (ret == 0)
__translate_statfs64(&linux_buf, mac);
return ret;
}
int __maskrune(__darwin_ct_rune_t _c, unsigned long _f) {
return _DefaultRuneLocale.__runetype[_c & 0xff] & _f;
}
int __maskrune_l(__darwin_ct_rune_t _c, unsigned long _f, void* l) {
return __maskrune(_c, _f);
}
size_t mbstowcs_l(wchar_t* pwcs, const char* s, size_t n, void* l) {
return mbstowcs(pwcs, s, n);
}
size_t wcswidth_l(wchar_t* pwcs, size_t n, void* l) {
return wcswidth(pwcs, n);
}
void libiconv_set_relocation_prefix(const char* orig, const char* curr) {
// TODO: What should we do?
abort();
}
// TODO: We need rdtsc.
struct mach_timebase_info {
uint32_t numer;
uint32_t denom;
};
uint64_t mach_absolute_time() {
return clock();
}
int mach_timebase_info(struct mach_timebase_info* info) {
info->numer = 1;
info->denom = CLOCKS_PER_SEC;
return 0;
}
void* mach_task_self_;
// From /usr/include/mach/host_info.h
struct __darwin_host_basic_info {
int max_cpus;
int avail_cpus;
int memory_size;
unsigned int cpu_type;
unsigned int cpu_subtype;
unsigned int cpu_threadtype;
int physical_cpu;
int physical_cpu_max;
int logical_cpu;
int logical_cpu_max;
uint64_t max_mem;
};
int host_info(int host, int flavor,
struct __darwin_host_basic_info* info, int* info_cnt) {
if (flavor != 1) {
fprintf(stderr, "host_info with flavor=%d isn't supported yet.\n", flavor);
abort();
}
// TODO(hamaji): only supports x86-64.
memset(info, 0, sizeof(*info));
info->cpu_type = 16777223;
info->cpu_subtype = 3;
*info_cnt = sizeof(*info);
return 0;
}
struct __darwin_host_load_info {
int avenrun[3];
int mach_factor[3];
};
int host_statistics(int host, int flavor,
struct __darwin_host_load_info* info, int* info_cnt) {
// TODO(hamaji): implement this.
info->avenrun[0] = 0;
info->avenrun[1] = 0;
info->avenrun[2] = 0;
info->mach_factor[0] = 0;
info->mach_factor[1] = 0;
info->avenrun[2] = 0;
*info_cnt = sizeof(*info);
return 0;
}
char* mach_error_string() {
//abort();
//return "";
return "mach_error_string";
}
void* mach_host_self() {
//abort();
return NULL;
}
int mach_port_deallocate() {
// TODO(hamaji): leak
//abort();
return 0;
}
/* FIXME implement vm_function corectly.
* OznOg Obviosly, all this remain completelly wrong because completely void.
* This functions allow programs to start correctly and usually to run (almost)
* correctly, but the memory managment remains wrong. I do not really have good ideas
* to handle all this without reimplementing the whole memory managment now. Feel free
* to give me some good ideas.
* I do not think implementing vm_allocate vm_deallocate and vm_msync is a priority
* but I guess some programs really need them to work correctly.
*/
int vm_msync(int target_task, void** addr, size_t size, int flags) {
return 0;
}
int vm_allocate(int target_task, void** addr, size_t size, int flags) {
*addr = calloc(size, 1);
return 0;
}
int vm_deallocate() {
// TODO(hamaji): munmap, maybe
return 0;
}
void *__darwin_mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset) {
LOGF("mmap: addr=%p length=%lu prot=%d flags=%d fd=%d offset=%lu\n",
addr, (unsigned long)length, prot, flags, fd, offset);
// MAP_ANON is 0x1000 on darwin but 0x20 on linux.
//
// The following flags are darwin only.
// #define MAP_RENAME 0x0020 /* Sun: rename private pages to file */
// #define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */
// #define MAP_RESERVED0080 0x0080 /* previously unimplemented MAP_INHERIT */
// #define MAP_NOEXTEND 0x0100 /* for MAP_FILE, don't change file size */
// #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
// #define MAP_NOCACHE 0x0400 /* don't cache pages for this mapping */
flags = (flags & 0x1f) | (flags & 0x1000 ? MAP_ANONYMOUS : 0);
return mmap(addr, length, prot, flags, fd, offset);
}
// From /usr/include/sys/sysctl.h
#define CTL_KERN 1
#define CTL_HW 6
#define HW_NCPU 3
#define HW_PHYSMEM 5
#define HW_USERMEM 6
#define HW_AVAILCPU 25
#define KERN_OSRELEASE 2
int __darwin_sysctl(int* name, u_int namelen,
unsigned int* oldp, size_t* oldlenp,
void* newp, size_t newlen) {
int i;
LOGF("sysctl: namelen=%u", namelen);
for (i = 0; i < namelen; i++) {
LOGF(" name[%d]=%d", i, name[i]);
}
LOGF(" newp=%p\n", newp);
if (newp) {
fprintf(stderr, "sysctl with newp isn't supported yet.\n");
abort();
}
if (namelen != 2) {
fprintf(stderr, "sysctl with namelen=%u isn't supported yet.\n", namelen);
abort();
}
switch (name[0]) {
case CTL_HW: {
if (*oldlenp != sizeof(unsigned int)) {
fprintf(stderr,
"sysctl(HW) with oldlenp=%lu isn't supported yet.\n",
(unsigned long)*oldlenp);
abort();
}
unsigned int val = 0;
switch (name[1]) {
case HW_NCPU:
case HW_AVAILCPU:
val = 1;
break;
case HW_PHYSMEM:
case HW_USERMEM:
val = 2147483648U;
break;
default:
fprintf(stderr, "sysctl(HW) with name[1]=%d isn't supported yet.\n",
name[1]);
abort();
}
*oldp = val;
return 0;
}
case CTL_KERN: {
switch (name[1]) {
case KERN_OSRELEASE:
strcpy((char*)oldp, "10.6.0");
*oldlenp = 7;
break;
default:
fprintf(stderr, "sysctl(KERN) with oldp=%u isn't supported yet.\n",
*oldp);
abort();
}
return 0;
}
default:
fprintf(stderr,
"sysctl with name[0]=%d isn't supported yet.\n", name[0]);
abort();
}
}
/* stdio buffers */
struct __darwin_sbuf {
unsigned char *_base;
int _size;
};
// Unfortunately, putc_nolock depends on FILE's layout,
// so we need to wrap linux's FILE with darwin's layout.
typedef struct __darwin_sFILE {
unsigned char *_p; /* current position in (some) buffer */
int _r; /* read space left for getc() */
int _w; /* write space left for putc() */
// TODO(hamaji): we need to modify this value with ferror and feof...
short _flags; /* flags, below; this FILE is free if 0 */
short _file; /* fileno, if Unix descriptor, else -1 */
struct __darwin_sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
int _lbfsize; /* 0 or -_bf._size, for inline putc */
#if 0
/* operations */
void *_cookie; /* cookie passed to io functions */
int (*_close)(void *);
int (*_read) (void *, char *, int);
fpos_t (*_seek) (void *, fpos_t, int);
int (*_write)(void *, const char *, int);
/* separate buffer for long sequences of ungetc() */
struct __sbuf _ub; /* ungetc buffer */
struct __sFILEX *_extra; /* additions to FILE to not break ABI */
int _ur; /* saved _r when _r is counting ungetc data */
/* tricks to meet minimum requirements even when malloc() fails */
unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
unsigned char _nbuf[1]; /* guarantee a getc() buffer */
/* separate buffer for fgetln() when line crosses buffer boundary */
struct __sbuf _lb; /* buffer for fgetln() */
/* Unix stdio files get aligned to block boundaries on fseek() */
int _blksize; /* stat.st_blksize (may be != _bf._size) */
fpos_t _offset; /* current lseek offset (see WARNING) */
#endif
FILE* linux_fp;
} __darwin_FILE;
__darwin_FILE* __darwin_stdin;
__darwin_FILE* __darwin_stdout;
__darwin_FILE* __darwin_stderr;
static __darwin_FILE* __init_darwin_FILE(FILE* linux_fp) {
if (!linux_fp)
return NULL;
__darwin_FILE* fp = (__darwin_FILE*)malloc(sizeof(__darwin_FILE));
fp->_p = NULL;
fp->_r = -1;
fp->_w = -1;
fp->_flags = 0;
fp->_file = fileno(linux_fp);
fp->_lbfsize = 0;
fp->linux_fp = linux_fp;
return fp;
}
__darwin_FILE* __darwin_fopen(const char* path, const char* mode) {
return __init_darwin_FILE(fopen(path, mode));
}
__darwin_FILE* __darwin_fdopen(int fd, const char* mode) {
return __init_darwin_FILE(fdopen(fd, mode));
}
__darwin_FILE* __darwin_freopen(const char* path, const char* mode,
__darwin_FILE* fp) {
return __init_darwin_FILE(freopen(path, mode, fp->linux_fp));
}
int __darwin_fclose(__darwin_FILE* fp) {
int r = fclose(fp->linux_fp);
free(fp);
return r;
}
size_t __darwin_fread(void* ptr, size_t size, size_t nmemb,
__darwin_FILE* fp) {
return fread(ptr, size, nmemb, fp->linux_fp);
}
size_t __darwin_fwrite(void* ptr, size_t size, size_t nmemb,
__darwin_FILE* fp) {
return fwrite(ptr, size, nmemb, fp->linux_fp);
}
int __darwin_fseek(__darwin_FILE* fp, long offset, int whence) {
return fseek(fp->linux_fp, offset, whence);
}
long __darwin_ftell(__darwin_FILE* fp) {
return ftell(fp->linux_fp);
}
void __darwin_rewind(__darwin_FILE* fp) {
return rewind(fp->linux_fp);
}
int __darwin_getc(__darwin_FILE* fp) {
return getc(fp->linux_fp);
}
int __darwin_fgetc(__darwin_FILE* fp) {
return fgetc(fp->linux_fp);
}
int __darwin_ungetc(int c, __darwin_FILE* fp) {
return ungetc(c, fp->linux_fp);
}
char* __darwin_fgets(char* s, int size, __darwin_FILE* fp) {
return fgets(s, size, fp->linux_fp);
}
int __darwin_putc(int c, __darwin_FILE* fp) {
return putc(c, fp->linux_fp);
}
int __darwin_fputc(int c, __darwin_FILE* fp) {
return fputc(c, fp->linux_fp);
}
int __darwin_fputs(const char* s, __darwin_FILE* fp) {
return fputs(s, fp->linux_fp);
}
int __darwin_fprintf(__darwin_FILE* fp, const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
int r = vfprintf(fp->linux_fp, fmt, ap);
va_end(ap);
return r;
}
int __darwin_vfscanf(__darwin_FILE* fp, const char* fmt, va_list ap) {
return vfscanf(fp->linux_fp, fmt, ap);
}
int __darwin_fscanf(__darwin_FILE* fp, const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
int r = vfscanf(fp->linux_fp, fmt, ap);
va_end(ap);
return r;
}
int __darwin_vfprintf(__darwin_FILE* fp, const char* fmt, va_list ap) {
return vfprintf(fp->linux_fp, fmt, ap);
}
int __darwin_fflush(__darwin_FILE* fp) {
if (!fp)
return fflush(NULL);
return fflush(fp->linux_fp);
}
void __darwin_setbuf(__darwin_FILE* fp, char* buf) {
setbuf(fp->linux_fp, buf);
}
void __darwin_setbuffer(__darwin_FILE* fp, char* buf, size_t size) {
setbuffer(fp->linux_fp, buf, size);
}
int __darwin_ferror(__darwin_FILE* fp) {
LOGF("ferror: %d\n", ferror(fp->linux_fp));
return ferror(fp->linux_fp);
}
int __darwin_fileno(__darwin_FILE* fp) {
return fileno(fp->linux_fp);
}
__darwin_FILE* __darwin_tmpfile() {
return __init_darwin_FILE(tmpfile());
}
char __darwin_executable_path[PATH_MAX];
char __loader_path[PATH_MAX];
int _NSGetExecutablePath(char* buf, unsigned int* size) {
strcpy(buf, __darwin_executable_path);
*size = strlen(__darwin_executable_path);
return 0;
}
int __darwin_open(const char* path, int flags, mode_t mode) {
LOGF("open path=%s flags=%d\n", path, flags);
int linux_flags = 0;
linux_flags |= flags & O_ACCMODE;
// O_SHLOCK
if (flags & 0x10) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
// O_EXLOCK
if (flags & 0x20) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
if (flags & 0x40) linux_flags |= O_ASYNC;
if (flags & 0x80) linux_flags |= O_SYNC;
if (flags & 0x100) linux_flags |= O_NOFOLLOW;
if (flags & 0x200) linux_flags |= O_CREAT;
if (flags & 0x400) linux_flags |= O_TRUNC;
if (flags & 0x800) linux_flags |= O_EXCL;
// O_EVTONLY
if (flags & 0x8000) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
if (flags & 0x20000) linux_flags |= O_NOCTTY;
if (flags & 0x100000) linux_flags |= O_DIRECTORY;
// O_SYMLINK
if (flags & 0x200000) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
if (flags & 0x400000) linux_flags |= O_DSYNC;
// O_POPUP
if (flags & 0x80000000) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
// O_ALERT
if (flags & 0x20000000) {
fprintf(stderr, "Unsupported open flag=%d\n", flags);
abort();
}
return open(path, linux_flags, mode);
}
static char** add_loader_to_argv(char* argv[]) {
int i, argc;
for (argc = 0; argv[argc]; argc++);
LOGF("\n");
char** new_argv = malloc(sizeof(char*) * (argc + 2));
new_argv[0] = __loader_path;
for (i = 0; i < argc + 1; i++) {
new_argv[i + 1] = argv[i];
}
return new_argv;
}
int __darwin_execv(const char* path, char* argv[]) {
char** new_argv = add_loader_to_argv(argv);
LOGF("execv: path=%s\n", path);
int i;
for (i = 0; new_argv[i]; i++) {
LOGF("%s ", new_argv[i]);
}
LOGF("\n");
return execvp(__loader_path, new_argv);
}
// Finds executable "file" in path. Returns path name to execute.
// It leaks memory, but we don't care because it will be released
// in exec(3) call.
static char* find_in_path(const char* file) {
size_t len = strlen(file) + 1;
if (*file == '/') {
char* name = malloc(len + 1);
strcpy(name, file);
return name;
}
char* path = getenv("PATH");
if (path == NULL) {
// Get default path.
size_t len = confstr(_CS_PATH, (char*)NULL, 0);
path = (char*)alloca(len + 1);
path[0] = ':';
(void)confstr(_CS_PATH, path + 1, len);
}
size_t pathlen = strlen(path);
char* name = malloc(pathlen + len + 1);
// Puts "file" at the end of "name".
name = (char*)memcpy(name + pathlen + 1, file, len);
// "name" points '/file".
*--name = '/';
char* p = path; // next path to try.
do {
char* startp;
path = p;
p = strchrnul(path, ':');
if (p == path) {
// empty path, so it means current directory.
// so try relative path (== file).
startp = name + 1;
} else {
// add path before "/file".
startp = (char*)memcpy(name - (p - path), path, p - path);
}
// Otherwise, use startp as relative path.
int r = access(startp, X_OK);
if (r == 0) {
// If it is X_OK, assume we can execute it.
return startp;
}
// Otherwise, try another path.
} while (*p++ != '\0');
return NULL;
}
int __darwin_execvp(const char* file, char* argv[]) {
// TODO(hamaji): Incorrect.
if (access(file, X_OK) == 0) {
return __darwin_execv(file, argv);
} else {
char* path = find_in_path(file);
LOGF("execvp: file=%s path=%s\n", file, path);
if (!path) {
// This should fail.
return execvp(file, argv);
}
argv[0] = path;
return __darwin_execv(path, argv);
}
}
int __darwin_execl(const char* path, ...) {
err(1, "execl is not implemented yet\n");
return 0;
}
int __darwin_execlp(const char* file, const char* arg, ...) {
err(1, "execlp is not implemented yet\n");
return 0;
}
int __darwin_execve(const char* file, const char** argv, const char** envp) {
err(1, "execve is not implemented yet\n");
return 0;
}
int __darwin_execle(const char* file, const char* arg, ...) {
err(1, "execle is not implemented yet\n");
return 0;
}
// It seems the size of posix_spawn_file_actions_t of Mac is smaller
// than Linux so modifying posix_spawn_file_actions_t allocated in
// Mac's stack would cause stack overflow. Let's wrap it.
int __darwin_posix_spawn(pid_t* pid,
const char* path,
const posix_spawn_file_actions_t** file_actions,
const posix_spawnattr_t* attrp,
char* argv[],
char* const envp[]) {
char** new_argv = add_loader_to_argv(argv);
const posix_spawn_file_actions_t* fa = NULL;
if (file_actions)
fa = *file_actions;
int r = posix_spawn(pid,
__loader_path,
fa,
attrp,
new_argv,
envp);
free(new_argv);
return r;
}
int __darwin_posix_spawnp(pid_t *pid,
const char* file,
const posix_spawn_file_actions_t* file_actions,
const posix_spawnattr_t* attrp,
char* const argv[],
char* const envp[]) {
err(1, "posix_spawnp is not implemented yet\n");
return 0;
}
int __darwin_posix_spawn_file_actions_init(posix_spawn_file_actions_t** p) {
*p = (posix_spawn_file_actions_t*)malloc(sizeof(posix_spawn_file_actions_t));
return posix_spawn_file_actions_init(*p);
}
int __darwin_posix_spawn_file_actions_destroy(posix_spawn_file_actions_t** p) {
int r = posix_spawn_file_actions_destroy(*p);
free(*p);
return r;
}
int __darwin_posix_spawn_file_actions_addopen(
posix_spawn_file_actions_t** file_actions,
int fd,
const char* path,
int oflag,
int mode) {
return posix_spawn_file_actions_addopen(
*file_actions, fd, path, oflag, mode);
}
int __darwin_posix_spawn_file_actions_addclose(
posix_spawn_file_actions_t** file_actions,
int fd) {
return posix_spawn_file_actions_addclose(*file_actions, fd);
}
int __darwin_posix_spawn_file_actions_adddup2(
posix_spawn_file_actions_t** file_actions,
int fd,
int newfd) {
return posix_spawn_file_actions_adddup2(*file_actions, fd, newfd);
}
typedef struct {
const char *name;
unsigned int cputype;
unsigned int cpusubtype;
int byteorder;
const char *description;
} NXArchInfo;
// This was dumped on snow leopard.
NXArchInfo __darwin_all_arch_infos[] = {
// The first entry indicates the local arch.
{ "hppa", 11, 0, 2, "HP-PA" },
{ "i386", 7, 3, 1, "Intel 80x86" },
{ "x86_64", 16777223, 3, 1, "Intel x86-64" },
{ "i860", 15, 0, 2, "Intel 860" },
{ "m68k", 6, 1, 2, "Motorola 68K" },
{ "m88k", 13, 0, 2, "Motorola 88K" },