| _set_tp.c (145573) | _set_tp.c (147673) |
|---|---|
| 1/*- 2 * Copyright (c) 2004 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 2004 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/lib/libc/i386/gen/_set_tp.c 145573 2005-04-26 20:51:15Z peter $ | 26 * $FreeBSD: head/lib/libc/i386/gen/_set_tp.c 147673 2005-06-29 23:15:36Z peter $ |
| 27 */ 28 29#include <string.h> 30#include <stdint.h> | 27 */ 28 29#include <string.h> 30#include <stdint.h> |
| 31#include <machine/segments.h> | |
| 32#include <machine/sysarch.h> 33 34void 35_set_tp(void *tp) 36{ | 31#include <machine/sysarch.h> 32 33void 34_set_tp(void *tp) 35{ |
| 37 union descriptor ldt; 38 int error, sel; | |
| 39 | 36 |
| 40 error = i386_set_gsbase(tp); 41 if (error == 0) 42 return; 43 memset(&ldt, 0, sizeof(ldt)); 44 ldt.sd.sd_lolimit = 0xffff; /* 4G limit */ 45 ldt.sd.sd_lobase = ((uintptr_t)tp) & 0xffffff; 46 ldt.sd.sd_type = SDT_MEMRWA; 47 ldt.sd.sd_dpl = SEL_UPL; 48 ldt.sd.sd_p = 1; /* present */ 49 ldt.sd.sd_hilimit = 0xf; /* 4G limit */ 50 ldt.sd.sd_def32 = 1; /* 32 bit */ 51 ldt.sd.sd_gran = 1; /* limit in pages */ 52 ldt.sd.sd_hibase = (((uintptr_t)tp) >> 24) & 0xff; 53 sel = i386_set_ldt(LDT_AUTO_ALLOC, &ldt, 1); 54 __asm __volatile("movl %0,%%gs" : : "rm" ((sel << 3) | 7)); | 37 i386_set_gsbase(tp); |
| 55} | 38} |