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Diffstat (limited to 'libgloss/aarch64/syscalls.c')
| -rw-r--r-- | libgloss/aarch64/syscalls.c | 759 |
1 files changed, 0 insertions, 759 deletions
diff --git a/libgloss/aarch64/syscalls.c b/libgloss/aarch64/syscalls.c deleted file mode 100644 index 058cef5cb..000000000 --- a/libgloss/aarch64/syscalls.c +++ /dev/null @@ -1,759 +0,0 @@ -/* Copyright (c) 2009, 2010, 2011, 2012 ARM Ltd. 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. - 3. The name of the company may not be used to endorse or promote - products derived from this software without specific prior written - permission. - - THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD 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. */ - -/* Support files for GNU libc. Files in the system namespace go here. - Files in the C namespace (ie those that do not start with an - underscore) go in .c. */ - -#include <_ansi.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/fcntl.h> -#include <stdio.h> -#include <string.h> -#include <time.h> -#include <sys/time.h> -#include <sys/times.h> -#include <errno.h> -#include <reent.h> -#include <unistd.h> -#include <sys/wait.h> -#include "svc.h" - -/* Safe casting in both LP64 and ILP32. */ -#define POINTER_TO_PARAM_BLOCK_T(PTR) \ - (param_block_t)(unsigned long) (PTR) - -/* Forward prototypes. */ -int _system _PARAMS ((const char *)); -int _rename _PARAMS ((const char *, const char *)); -int _isatty _PARAMS ((int)); -clock_t _times _PARAMS ((struct tms *)); -int _gettimeofday _PARAMS ((struct timeval *, void *)); -int _unlink _PARAMS ((const char *)); -int _link _PARAMS ((void)); -int _stat _PARAMS ((const char *, struct stat *)); -int _fstat _PARAMS ((int, struct stat *)); -int _swistat _PARAMS ((int fd, struct stat * st)); -caddr_t _sbrk _PARAMS ((int)); -int _getpid _PARAMS ((int)); -int _close _PARAMS ((int)); -clock_t _clock _PARAMS ((void)); -int _swiclose _PARAMS ((int)); -int _open _PARAMS ((const char *, int, ...)); -int _swiopen _PARAMS ((const char *, int)); -int _write _PARAMS ((int, char *, int)); -int _swiwrite _PARAMS ((int, char *, int)); -int _lseek _PARAMS ((int, int, int)); -int _swilseek _PARAMS ((int, int, int)); -int _read _PARAMS ((int, char *, int)); -int _swiread _PARAMS ((int, char *, int)); -void initialise_monitor_handles _PARAMS ((void)); - -static int checkerror _PARAMS ((int)); -static int error _PARAMS ((int)); -static int get_errno _PARAMS ((void)); - -/* Struct used to keep track of the file position, just so we - can implement fseek(fh,x,SEEK_CUR). */ -struct fdent -{ - int handle; - int flags; - ino_t ino; - int pos; -}; - -#define MAX_OPEN_FILES 20 - -/* User file descriptors (fd) are integer indexes into - the openfiles[] array. Error checking is done by using - findslot(). - - This openfiles array is manipulated directly by only - these 5 functions: - - findslot() - Translate entry. - newslot() - Find empty entry. - initilise_monitor_handles() - Initialize entries. - _swiopen() - Initialize entry. - _close() - Handle stdout == stderr case. - - Every other function must use findslot(). */ - -static struct fdent openfiles[MAX_OPEN_FILES]; - -static struct fdent *findslot _PARAMS ((int)); -static int newslot _PARAMS ((void)); - -/* Register name faking - works in collusion with the linker. */ -#ifdef __ILP32__ -register char * stack_ptr asm ("wsp"); -#else -register char * stack_ptr asm ("sp"); -#endif - - -/* following is copied from libc/stdio/local.h to check std streams */ -extern void _EXFUN (__sinit, (struct _reent *)); -#define CHECK_INIT(ptr) \ - do \ - { \ - if ((ptr) && !(ptr)->__sdidinit) \ - __sinit (ptr); \ - } \ - while (0) - -static int monitor_stdin; -static int monitor_stdout; -static int monitor_stderr; - -/* Return a pointer to the structure associated with - the user file descriptor fd. */ -static struct fdent * -findslot (int fd) -{ - CHECK_INIT (_REENT); - - /* User file descriptor is out of range. */ - if ((unsigned int) fd >= MAX_OPEN_FILES) - return NULL; - - /* User file descriptor is open? */ - if (openfiles[fd].handle == -1) - return NULL; - - /* Valid. */ - return &openfiles[fd]; -} - -/* Return the next lowest numbered free file - structure, or -1 if we can't find one. */ -static int -newslot (void) -{ - int i; - - for (i = 0; i < MAX_OPEN_FILES; i++) - if (openfiles[i].handle == -1) - break; - - if (i == MAX_OPEN_FILES) - return -1; - - return i; -} - -void -initialise_monitor_handles (void) -{ - int i; - - /* Open the standard file descriptors by opening the special - * teletype device, ":tt", read-only to obtain a descritpor for - * standard input and write-only to obtain a descriptor for standard - * output. Finally, open ":tt" in append mode to obtain a descriptor - * for standard error. Since this is a write mode, most kernels will - * probably return the same value as for standard output, but the - * kernel can differentiate the two using the mode flag and return a - * different descriptor for standard error. - */ - - param_block_t block[3]; - - block[0] = POINTER_TO_PARAM_BLOCK_T (":tt"); - block[2] = 3; /* length of filename */ - block[1] = 0; /* mode "r" */ - monitor_stdin = do_AngelSVC (AngelSVC_Reason_Open, block); - - block[0] = POINTER_TO_PARAM_BLOCK_T (":tt"); - block[2] = 3; /* length of filename */ - block[1] = 4; /* mode "w" */ - monitor_stdout = do_AngelSVC (AngelSVC_Reason_Open, block); - - block[0] = POINTER_TO_PARAM_BLOCK_T (":tt"); - block[2] = 3; /* length of filename */ - block[1] = 8; /* mode "a" */ - monitor_stderr = do_AngelSVC (AngelSVC_Reason_Open, block); - - /* If we failed to open stderr, redirect to stdout. */ - if (monitor_stderr == -1) - monitor_stderr = monitor_stdout; - - for (i = 0; i < MAX_OPEN_FILES; i++) - openfiles[i].handle = -1; - - openfiles[0].handle = monitor_stdin; - openfiles[0].flags = _FREAD; - openfiles[0].pos = 0; - openfiles[1].handle = monitor_stdout; - openfiles[0].flags = _FWRITE; - openfiles[1].pos = 0; - openfiles[2].handle = monitor_stderr; - openfiles[0].flags = _FWRITE; - openfiles[2].pos = 0; -} - -static int -get_errno (void) -{ - return do_AngelSVC (AngelSVC_Reason_Errno, NULL); -} - -/* Set errno and return result. */ -static int -error (int result) -{ - errno = get_errno (); - return result; -} - -/* Check the return and set errno appropriately. */ -static int -checkerror (int result) -{ - if (result == -1) - return error (-1); - return result; -} - -/* fh, is a valid internal file handle. - ptr, is a null terminated string. - len, is the length in bytes to read. - Returns the number of bytes *not* written. */ -int -_swiread (int fh, char *ptr, int len) -{ - param_block_t block[3]; - - block[0] = fh; - block[1] = POINTER_TO_PARAM_BLOCK_T (ptr); - block[2] = len; - - return checkerror (do_AngelSVC (AngelSVC_Reason_Read, block)); -} - -/* fd, is a valid user file handle. - Translates the return of _swiread into - bytes read. */ -int -_read (int fd, char *ptr, int len) -{ - int res; - struct fdent *pfd; - - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return -1; - } - - res = _swiread (pfd->handle, ptr, len); - - if (res == -1) - return res; - - pfd->pos += len - res; - - /* res == len is not an error, - at least if we want feof() to work. */ - return len - res; -} - -/* fd, is a user file descriptor. */ -int -_swilseek (int fd, int ptr, int dir) -{ - int res; - struct fdent *pfd; - - /* Valid file descriptor? */ - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return -1; - } - - /* Valid whence? */ - if ((dir != SEEK_CUR) && (dir != SEEK_SET) && (dir != SEEK_END)) - { - errno = EINVAL; - return -1; - } - - /* Convert SEEK_CUR to SEEK_SET */ - if (dir == SEEK_CUR) - { - ptr = pfd->pos + ptr; - /* The resulting file offset would be negative. */ - if (ptr < 0) - { - errno = EINVAL; - if ((pfd->pos > 0) && (ptr > 0)) - errno = EOVERFLOW; - return -1; - } - dir = SEEK_SET; - } - - param_block_t block[2]; - if (dir == SEEK_END) - { - block[0] = pfd->handle; - res = checkerror (do_AngelSVC (AngelSVC_Reason_FLen, block)); - if (res == -1) - return -1; - ptr += res; - } - - /* This code only does absolute seeks. */ - block[0] = pfd->handle; - block[1] = ptr; - res = checkerror (do_AngelSVC (AngelSVC_Reason_Seek, block)); - /* At this point ptr is the current file position. */ - if (res >= 0) - { - pfd->pos = ptr; - return ptr; - } - else - return -1; -} - -_lseek (int fd, int ptr, int dir) -{ - return _swilseek (fd, ptr, dir); -} - -/* fh, is a valid internal file handle. - Returns the number of bytes *not* written. */ -int -_swiwrite (int fh, char *ptr, int len) -{ - param_block_t block[3]; - - block[0] = fh; - block[1] = POINTER_TO_PARAM_BLOCK_T (ptr); - block[2] = len; - - return checkerror (do_AngelSVC (AngelSVC_Reason_Write, block)); -} - -/* fd, is a user file descriptor. */ -int -_write (int fd, char *ptr, int len) -{ - int res; - struct fdent *pfd; - - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return -1; - } - - res = _swiwrite (pfd->handle, ptr, len); - - /* Clearly an error. */ - if (res < 0) - return -1; - - pfd->pos += len - res; - - /* We wrote 0 bytes? - Retrieve errno just in case. */ - if ((len - res) == 0) - return error (0); - - return (len - res); -} - -int -_swiopen (const char *path, int flags) -{ - int aflags = 0, fh; - param_block_t block[3]; - static ino_t ino = 1; - int fd; - - if (path == NULL) - { - errno = ENOENT; - return -1; - } - - fd = newslot (); - - if (fd == -1) - { - errno = EMFILE; - return -1; - } - - /* It is an error to open a file that already exists. */ - if ((flags & O_CREAT) && (flags & O_EXCL)) - { - struct stat st; - int res; - res = _stat (path, &st); - if (res != -1) - { - errno = EEXIST; - return -1; - } - } - - /* The flags are Unix-style, so we need to convert them. */ -#ifdef O_BINARY - if (flags & O_BINARY) - aflags |= 1; -#endif - - /* In O_RDONLY we expect aflags == 0. */ - - if (flags & O_RDWR) - aflags |= 2; - - if ((flags & O_CREAT) || (flags & O_TRUNC) || (flags & O_WRONLY)) - aflags |= 4; - - if (flags & O_APPEND) - { - /* Can't ask for w AND a; means just 'a'. */ - aflags &= ~4; - aflags |= 8; - } - - block[0] = POINTER_TO_PARAM_BLOCK_T (path); - block[2] = strlen (path); - block[1] = aflags; - - fh = do_AngelSVC (AngelSVC_Reason_Open, block); - - /* Return a user file descriptor or an error. */ - if (fh >= 0) - { - openfiles[fd].handle = fh; - openfiles[fd].flags = flags + 1; - openfiles[fd].ino = ino++; - openfiles[fd].pos = 0; - return fd; - } - else - return error (fh); -} - -int -_open (const char *path, int flags, ...) -{ - return _swiopen (path, flags); -} - -/* fh, is a valid internal file handle. */ -int -_swiclose (int fh) -{ - param_block_t param[1]; - param[0] = fh; - return checkerror (do_AngelSVC (AngelSVC_Reason_Close, param)); -} - -/* fd, is a user file descriptor. */ -int -_close (int fd) -{ - int res; - struct fdent *pfd; - - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return -1; - } - - /* Handle stderr == stdout. */ - if ((fd == 1 || fd == 2) && (openfiles[1].handle == openfiles[2].handle)) - { - pfd->handle = -1; - return 0; - } - - /* Attempt to close the handle. */ - res = _swiclose (pfd->handle); - - /* Reclaim handle? */ - if (res == 0) - pfd->handle = -1; - - return res; -} - -int __attribute__((weak)) -_getpid (int n __attribute__ ((unused))) -{ - return 1; -} - -caddr_t -_sbrk (int incr) -{ - extern char end asm ("end"); /* Defined by the linker. */ - static char *heap_end; - char *prev_heap_end; - - if (heap_end == NULL) - heap_end = &end; - - prev_heap_end = heap_end; - - if (heap_end + incr > stack_ptr) - { - /* Some of the libstdc++-v3 tests rely upon detecting - out of memory errors, so do not abort here. */ - errno = ENOMEM; - return (caddr_t) - 1; - } - - heap_end += incr; - - return (caddr_t) prev_heap_end; -} - -int -_swistat (int fd, struct stat *st) -{ - struct fdent *pfd; - param_block_t param[1]; - int res; - - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return -1; - } - - param[0] = pfd->handle; - res = do_AngelSVC (AngelSVC_Reason_IsTTY, param); - if (res != 0 && res != 1) - return error (-1); - - memset (st, 0, sizeof (*st)); - - if (res) - { - /* This is a tty. */ - st->st_mode |= S_IFCHR; - } - else - { - /* This is a file, return the file length. */ - st->st_mode |= S_IFREG; - res = checkerror (do_AngelSVC (AngelSVC_Reason_FLen, param)); - if (res == -1) - return -1; - st->st_size = res; - st->st_blksize = 1024; - st->st_blocks = (res + 1023) / 1024; - } - - /* Deduce permissions based on mode in which file opened. */ - st->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; - if (pfd->flags & _FWRITE) - st->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; - - st->st_ino = pfd->ino; - st->st_nlink = 1; - return 0; -} - -int __attribute__((weak)) -_fstat (int fd, struct stat * st) -{ - return _swistat (fd, st); -} - -int __attribute__((weak)) -_stat (const char *fname, struct stat *st) -{ - int fd, res; - /* The best we can do is try to open the file readonly. - If it exists, then we can guess a few things about it. */ - if ((fd = _open (fname, O_RDONLY)) == -1) - return -1; - res = _swistat (fd, st); - /* Not interested in the error. */ - _close (fd); - return res; -} - -int __attribute__((weak)) -_link (void) -{ - errno = ENOSYS; - return -1; -} - -int -_unlink (const char *path) -{ - int res; - param_block_t block[2]; - block[0] = POINTER_TO_PARAM_BLOCK_T (path); - block[1] = strlen (path); - res = do_AngelSVC (AngelSVC_Reason_Remove, block); - if (res == -1) - return error (res); - return 0; -} - -int -_gettimeofday (struct timeval *tp, void *tzvp) -{ - struct timezone *tzp = tzvp; - if (tp) - { - /* Ask the host for the seconds since the Unix epoch. */ - tp->tv_sec = do_AngelSVC (AngelSVC_Reason_Time, NULL); - tp->tv_usec = 0; - } - - /* Return fixed data for the timezone. */ - if (tzp) - { - tzp->tz_minuteswest = 0; - tzp->tz_dsttime = 0; - } - - return 0; -} - -/* Return a clock that ticks at 100Hz. */ -clock_t -_clock (void) -{ - clock_t timeval; - - timeval = do_AngelSVC (AngelSVC_Reason_Clock, NULL); - return timeval; -} - -/* Return a clock that ticks at 100Hz. */ -clock_t -_times (struct tms * tp) -{ - clock_t timeval = _clock (); - - if (tp) - { - tp->tms_utime = timeval; /* user time */ - tp->tms_stime = 0; /* system time */ - tp->tms_cutime = 0; /* user time, children */ - tp->tms_cstime = 0; /* system time, children */ - } - - return timeval; -}; - - -int -_isatty (int fd) -{ - struct fdent *pfd; - param_block_t param[1]; - int res; - - /* Return 1 if fd is an open file descriptor referring to a terminal; - otherwise 0 is returned, and errno is set to indicate the error. */ - - pfd = findslot (fd); - if (pfd == NULL) - { - errno = EBADF; - return 0; - } - - param[0] = pfd->handle; - res = do_AngelSVC (AngelSVC_Reason_IsTTY, param); - - if (res != 1) - return error (0); - return res; -} - -int -_system (const char *s) -{ - param_block_t block[2]; - int e; - - /* Hmmm. The ARM debug interface specification doesn't say whether - SYS_SYSTEM does the right thing with a null argument, or assign any - meaning to its return value. Try to do something reasonable.... */ - if (!s) - return 1; /* maybe there is a shell available? we can hope. :-P */ - block[0] = POINTER_TO_PARAM_BLOCK_T (s); - block[1] = strlen (s); - e = checkerror (do_AngelSVC (AngelSVC_Reason_System, block)); - if ((e >= 0) && (e < 256)) - { - /* We have to convert e, an exit status to the encoded status of - the command. To avoid hard coding the exit status, we simply - loop until we find the right position. */ - int exit_code; - - for (exit_code = e; e && WEXITSTATUS (e) != exit_code; e <<= 1) - continue; - } - return e; -} - -int -_rename (const char *oldpath, const char *newpath) -{ - param_block_t block[4]; - block[0] = POINTER_TO_PARAM_BLOCK_T (oldpath); - block[1] = strlen (oldpath); - block[2] = POINTER_TO_PARAM_BLOCK_T (newpath); - block[3] = strlen (newpath); - return checkerror (do_AngelSVC (AngelSVC_Reason_Rename, block)) ? -1 : 0; -} - -/* Returns the number of elapsed target ticks since the support code - started execution. Returns -1 and sets errno on error. */ -long -__aarch64_angel_elapsed (void) -{ - int result; - param_block_t block[2]; - result = checkerror (do_AngelSVC (AngelSVC_Reason_Elapsed, block)); - if (result == -1) - return result; - return block[0]; -} |