| machdep.c (251039) | machdep.c (254025) |
|---|---|
| 1/*- 2 * Copyright (c) 1992 Terrence R. Lambert. 3 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * --- 24 unchanged lines hidden (view full) --- 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 38 */ 39 40#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1992 Terrence R. Lambert. 3 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * --- 24 unchanged lines hidden (view full) --- 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 38 */ 39 40#include <sys/cdefs.h> |
| 41__FBSDID("$FreeBSD: head/sys/i386/i386/machdep.c 251039 2013-05-27 18:39:39Z kib $"); | 41__FBSDID("$FreeBSD: head/sys/i386/i386/machdep.c 254025 2013-08-07 06:21:20Z jeff $"); |
| 42 43#include "opt_apic.h" 44#include "opt_atalk.h" 45#include "opt_atpic.h" 46#include "opt_compat.h" 47#include "opt_cpu.h" 48#include "opt_ddb.h" 49#include "opt_inet.h" --- 3123 unchanged lines hidden (view full) --- 3173 3174 if (!has_f00f_bug) 3175 return; 3176 3177 GIANT_REQUIRED; 3178 3179 printf("Intel Pentium detected, installing workaround for F00F bug\n"); 3180 | 42 43#include "opt_apic.h" 44#include "opt_atalk.h" 45#include "opt_atpic.h" 46#include "opt_compat.h" 47#include "opt_cpu.h" 48#include "opt_ddb.h" 49#include "opt_inet.h" --- 3123 unchanged lines hidden (view full) --- 3173 3174 if (!has_f00f_bug) 3175 return; 3176 3177 GIANT_REQUIRED; 3178 3179 printf("Intel Pentium detected, installing workaround for F00F bug\n"); 3180 |
| 3181 tmp = kmem_alloc(kernel_map, PAGE_SIZE * 2); | 3181 tmp = kmem_malloc(kernel_arena, PAGE_SIZE * 2, M_WAITOK | M_ZERO); |
| 3182 if (tmp == 0) | 3182 if (tmp == 0) |
| 3183 panic("kmem_alloc returned 0"); | 3183 panic("kmem_malloc returned 0"); |
| 3184 3185 /* Put the problematic entry (#6) at the end of the lower page. */ 3186 new_idt = (struct gate_descriptor*) 3187 (tmp + PAGE_SIZE - 7 * sizeof(struct gate_descriptor)); 3188 bcopy(idt, new_idt, sizeof(idt0)); 3189 r_idt.rd_base = (u_int)new_idt; 3190 lidt(&r_idt); 3191 idt = new_idt; | 3184 3185 /* Put the problematic entry (#6) at the end of the lower page. */ 3186 new_idt = (struct gate_descriptor*) 3187 (tmp + PAGE_SIZE - 7 * sizeof(struct gate_descriptor)); 3188 bcopy(idt, new_idt, sizeof(idt0)); 3189 r_idt.rd_base = (u_int)new_idt; 3190 lidt(&r_idt); 3191 idt = new_idt; |
| 3192 if (vm_map_protect(kernel_map, tmp, tmp + PAGE_SIZE, 3193 VM_PROT_READ, FALSE) != KERN_SUCCESS) 3194 panic("vm_map_protect failed"); | 3192 pmap_protect(kernel_pmap, tmp, tmp + PAGE_SIZE, VM_PROT_READ); |
| 3195} 3196#endif /* defined(I586_CPU) && !NO_F00F_HACK */ 3197 3198/* 3199 * Construct a PCB from a trapframe. This is called from kdb_trap() where 3200 * we want to start a backtrace from the function that caused us to enter 3201 * the debugger. We have the context in the trapframe, but base the trace 3202 * on the PCB. The PCB doesn't have to be perfect, as long as it contains --- 548 unchanged lines hidden --- | 3193} 3194#endif /* defined(I586_CPU) && !NO_F00F_HACK */ 3195 3196/* 3197 * Construct a PCB from a trapframe. This is called from kdb_trap() where 3198 * we want to start a backtrace from the function that caused us to enter 3199 * the debugger. We have the context in the trapframe, but base the trace 3200 * on the PCB. The PCB doesn't have to be perfect, as long as it contains --- 548 unchanged lines hidden --- |