engine-powerpc-netbsd.c
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Visual C++
- /* ==== machdep.c ============================================================
- * Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu
- *
- * Description : Machine dependent functions for NetBSD/PowerPC (1.5+)
- *
- * 1.00 93/08/04 proven
- * -Started coding this file.
- *
- * 2001/01/10 briggs
- * -Modified to make it go with NetBSD/PowerPC
- */
- #ifndef lint
- static const char rcsid[] = "engine-alpha-osf1.c,v 1.4.4.1 1995/12/13 05:41:37 proven Exp";
- #endif
- #include <pthread.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/syscall.h>
- #include <stdlib.h>
- #include <fcntl.h>
- #include <stdio.h>
- /* ==========================================================================
- * machdep_pthread_start()
- */
- void machdep_pthread_start(void)
- {
- context_switch_done();
- pthread_sched_resume ();
- /* XXXMLG
- * This is EXTREMELY bogus, but it seems that this function is called
- * with the pthread kernel locked. If this happens, __errno() will
- * return the wrong address until after the first context switch.
- *
- * Clearly there is a leak of pthread_kernel somewhere, but until
- * it is found, we force a context switch here, just before calling
- * the thread start routine. When we return from pthread_yield
- * the kernel will be unlocked.
- */
- pthread_yield();
- /* Run current threads start routine with argument */
- pthread_exit(pthread_run->machdep_data.start_routine
- (pthread_run->machdep_data.start_argument));
- /* should never reach here */
- PANIC();
- }
- /* ==========================================================================
- * __machdep_pthread_create()
- */
- void __machdep_pthread_create(struct machdep_pthread *machdep_pthread,
- void *(* start_routine)(void *), void *start_argument,
- long stack_size, long nsec, long flags)
- {
- machdep_pthread->start_routine = start_routine;
- machdep_pthread->start_argument = start_argument;
- machdep_pthread->machdep_timer.it_value.tv_sec = 0;
- machdep_pthread->machdep_timer.it_interval.tv_sec = 0;
- machdep_pthread->machdep_timer.it_interval.tv_usec = 0;
- machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000;
- /* Set up new stack frame so that it looks like it returned from a
- longjmp() to the beginning of machdep_pthread_start(). */
- /* state is sigmask, then r8-r31 where r11 is the LR
- * So, istate[3] is r10, which is the SP
- * So, istate[4] is r11, which is the LR
- * So, istate[5] is r12, which is the CR
- */
- machdep_pthread->machdep_istate[4] = (long)machdep_pthread_start;
- machdep_pthread->machdep_istate[5] = 0;
- /* PowerPC stack starts high and builds down, and needs to be 16-byte
- aligned. */
- machdep_pthread->machdep_istate[3] =
- ((long) machdep_pthread->machdep_stack + stack_size) & ~0xf;
- }
- /* ==========================================================================
- * machdep_save_state()
- */
- int machdep_save_state(void)
- {
- return( _setjmp(pthread_run->machdep_data.machdep_istate) );
- }
- void machdep_restore_state(void)
- {
- _longjmp(pthread_run->machdep_data.machdep_istate, 1);
- }
- void machdep_save_float_state (struct pthread *pthread)
- {
- __machdep_save_fp_state(pthread->machdep_data.machdep_fstate);
- }
- void machdep_restore_float_state (void)
- {
- __machdep_restore_fp_state(pthread_run->machdep_data.machdep_fstate);
- }
- /* ==========================================================================
- * machdep_set_thread_timer()
- */
- void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread)
- {
- if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) {
- PANIC();
- }
- }
- /* ==========================================================================
- * machdep_unset_thread_timer()
- */
- void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread)
- {
- struct itimerval zeroval = { { 0, 0 }, { 0, 0} };
- if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) {
- PANIC();
- }
- }
- /* ==========================================================================
- * machdep_pthread_cleanup()
- */
- void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread)
- {
- return(machdep_pthread->machdep_stack);
- }
- void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread);
- void machdep_pthread_start(void);
- /* ==========================================================================
- * __machdep_stack_free()
- */
- void
- __machdep_stack_free(void * stack)
- {
- free(stack);
- }
- /* ==========================================================================
- * __machdep_stack_alloc()
- */
- void *
- __machdep_stack_alloc(size_t size)
- {
- return(malloc(size));
- }
- /* ==========================================================================
- * machdep_sys_creat()
- */
- int
- machdep_sys_creat(char * path, int mode)
- {
- return(machdep_sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode));
- }
- /* ==========================================================================
- * machdep_sys_wait3()
- */
- int
- machdep_sys_wait3(int * b, int c, int *d)
- {
- return(machdep_sys_wait4(0, b, c, d));
- }
- /* ==========================================================================
- * machdep_sys_waitpid()
- */
- int
- machdep_sys_waitpid(int a, int * b, int c)
- {
- return(machdep_sys_wait4(a, b, c, NULL));
- }
- /* ==========================================================================
- * machdep_sys_getdtablesize()
- */
- int
- machdep_sys_getdtablesize(void)
- {
- return(sysconf(_SC_OPEN_MAX));
- }
- /* ==========================================================================
- * machdep_sys_lseek()
- */
- off_t
- machdep_sys_lseek(int fd, off_t offset, int whence)
- {
- return(__syscall((quad_t)SYS_lseek, fd, 0, offset, whence));
- }
- int
- machdep_sys_ftruncate( int fd, off_t length)
- {
- quad_t q;
- int rv;
- q = __syscall((quad_t)SYS_ftruncate, fd,0, length);
- if( /* LINTED constant */ sizeof( quad_t ) == sizeof( register_t ) ||
- /* LINTED constant */ BYTE_ORDER == LITTLE_ENDIAN )
- rv = (int)q;
- else
- rv = (int)((u_quad_t)q >> 32);
- return rv;
- }
- /* ==========================================================================
- * machdep_sys_getdirentries()
- */
- int
- machdep_sys_getdirentries(int fd, char * buf, int len, int * seek)
- {
- return(machdep_sys_getdents(fd, buf, len));
- }