*
* @APPLE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <assym.s>
#include <mach/exception_types.h>
-#include <i386/AT386/mp/mp.h>
+#include <i386/mp.h>
#define PREEMPT_DEBUG_LOG 0
testl $3,4(%esp) /* is trap from kernel mode? */
jnz 0f /* if so: */
cmpl $syscall_entry,(%esp) /* system call entry? */
- jne 0f /* if so: */
+ jne 1f /* if so: */
/* flags are sitting where syscall */
/* wants them */
addl $8,%esp /* remove eip/cs */
jmp syscall_entry_2 /* continue system call entry */
+1: cmpl $trap_unix_addr,(%esp)
+ jne 0f
+ addl $8,%esp
+ jmp trap_unix_2
+
0: pushl $0 /* otherwise: */
pushl $(T_DEBUG) /* handle as normal */
jmp EXT(alltraps) /* debug fault */
jnz EXT(return_xfer_stack)
movl $ CPD_ACTIVE_THREAD,%ebx
movl %gs:(%ebx),%ebx /* get active thread */
- movl TH_TOP_ACT(%ebx),%ebx /* get thread->top_act */
- cmpl $0,ACT_KLOADING(%ebx) /* check if kernel-loading */
- jnz EXT(return_kernel_loading)
#if MACH_RT
#if MACH_ASSERT
movl CX(EXT(kernel_stack),%eax),%esp
movl $ CPD_ACTIVE_THREAD,%ebx
movl %gs:(%ebx),%ebx /* get active thread */
- movl TH_TOP_ACT(%ebx),%ebx /* get thread->top_act */
movl %ebx,%edx /* save for later */
- movl $0,ACT_KLOADING(%edx) /* clear kernel-loading bit */
FRAME_PCB_TO_STACK(%ebx)
movl %ebx,%esp /* start running on new stack */
- movl $1,ACT_KLOADED(%edx) /* set kernel-loaded bit */
- movl %edx,CX(EXT(active_kloaded),%eax) /* set cached indicator */
+ movl $0,CX(EXT(active_kloaded),%eax) /* set cached indicator */
jmp EXT(return_from_kernel)
/*
#define CHECK_INTERRUPT_TIME(n)
#endif
+.data
imsg_start:
String "interrupt start"
imsg_end:
String "interrupt end"
+.text
/*
* All interrupts enter here.
* old %eax on stack; interrupt number in %eax.
pushl %ds /* save segment registers */
pushl %es
+ pushl %fs
+ pushl %gs
mov %ss,%dx /* switch to kernel segments */
mov %dx,%ds
mov %dx,%es
CPU_NUMBER(%edx)
movl CX(EXT(int_stack_top),%edx),%ecx
- movl 20(%esp),%edx /* get eip */
+ movl %esp,%edx /* & i386_interrupt_state */
xchgl %ecx,%esp /* switch to interrupt stack */
#if STAT_TIME
TIME_INT_ENTRY /* do timing */
#endif
- pushl %edx /* pass eip to pe_incoming_interrupt */
+ pushl %edx /* pass &i386_interrupt_state to pe_incoming_interrupt */
#if MACH_RT
movl $ CPD_PREEMPTION_LEVEL,%edx
#endif /* MACH_RT */
1:
+ pop %gs
+ pop %fs
pop %es /* restore segment regs */
pop %ds
pop %edx
movl $ CPD_INTERRUPT_LEVEL,%edx
incl %gs:(%edx)
- movl 12(%esp),%edx
- pushl %edx /* push eip */
+ subl $16, %esp /* dummy ds, es, fs, gs */
+ movl %esp, %edx /* &i386_interrupt_state */
+ pushl %edx /* pass &i386_interrupt_state to PE_incoming_interrupt /*
pushl %eax /* Push trap number */
call EXT(PE_incoming_interrupt)
- addl $4,%esp /* pop eip */
+ addl $20,%esp /* pop i386_interrupt_state, dummy gs,fs,es,ds */
LEXT(return_to_iret_i) /* ( label for kdb_kintr) */
* ss
*/
ast_from_interrupt:
+ pop %gs
+ pop %fs
pop %es /* restore all registers ... */
pop %ds
popl %edx
* ebx contains user regs pointer
*/
2:
+
+ pushl %ebx /* arg ptr */
+ pushl %eax /* call # - preserved across */
+ call EXT(mach_call_start)
+ addl $ 8, %esp
+ movl %eax, %ebx /* need later */
+
CAH(call_call)
call *EXT(mach_trap_table)+4(%eax)
/* call procedure */
+
+ pushl %eax /* retval */
+ pushl %ebx /* call # */
+ call EXT(mach_call_end)
+ addl $ 8, %esp
+
movl %esp,%ecx /* get kernel stack */
or $(KERNEL_STACK_SIZE-1),%ecx
movl -3-IKS_SIZE(%ecx),%esp /* switch back to PCB stack */
1:
movl $ CPD_ACTIVE_THREAD,%edx
movl %gs:(%edx),%edx /* get active thread */
- /* point to current thread */
- movl TH_TOP_ACT(%edx),%edx /* get thread->top_act */
movl ACT_TASK(%edx),%edx /* point to task */
movl TASK_EMUL(%edx),%edx /* get emulation vector */
orl %edx,%edx /* if none, */
movl $ CPD_ACTIVE_THREAD,%edx
movl %gs:(%edx),%edx /* get active thread */
- /* point to current thread */
- movl TH_TOP_ACT(%edx),%edx /* get thread->top_act */
movl ACT_TASK(%edx),%edx /* point to task */
movl TASK_EMUL(%edx),%edx /* get emulation vector */
orl %edx,%edx /* if it exists, */
#endif /* ETAP_EVENT_MONITOR */
make_syscall:
+
+ pushl %ebx /* arg ptr */
+ pushl %eax /* call # - preserved across */
+ call EXT(mach_call_start)
+ addl $ 8, %esp
+ movl %eax, %ebx /* need later */
+
call *EXT(mach_trap_table)+4(%eax) /* call procedure */
+
+ pushl %eax /* retval */
+ pushl %ebx /* call # */
+ call EXT(mach_call_end)
+ addl $ 8, %esp
+
skip_syscall:
movl %esp,%ecx /* get kernel stack */
mach_call_range:
movl $ CPD_ACTIVE_THREAD,%edx
movl %gs:(%edx),%edx /* get active thread */
-
- movl TH_TOP_ACT(%edx),%edx /* get thread->top_act */
movl ACT_TASK(%edx),%edx /* point to task */
movl TASK_EMUL(%edx),%edx /* get emulation vector */
orl %edx,%edx /* if emulator, */
movl $ CPD_ACTIVE_THREAD,%ecx
movl %gs:(%ecx),%ecx /* get active thread */
- movl TH_TOP_ACT(%ecx),%ecx /* get thread->top_act */
movl ACT_MAP(%ecx),%ecx /* get act->map */
movl MAP_PMAP(%ecx),%ecx /* get map->pmap */
cmpl EXT(kernel_pmap), %ecx
movl $ CPD_ACTIVE_THREAD,%ecx
movl %gs:(%ecx),%ecx /* get active thread */
- movl TH_TOP_ACT(%ecx),%ecx /* get thread->top_act */
movl ACT_MAP(%ecx),%ecx /* get act->map */
movl MAP_PMAP(%ecx),%ecx /* get map->pmap */
cmpl EXT(kernel_pmap), %ecx
je 5f /* Zero count.. error out */
cmpl $0,%eax
jne 2b /* .. a NUL found? */
- jmp 4f
+ jmp 4f /* return zero (%eax) */
5:
movl $ ENAMETOOLONG,%eax /* String is too long.. */
4:
- xorl %eax,%eax /* return zero for success */
movl 8+S_ARG3,%edi /* get OUT len ptr */
cmpl $0,%edi
jz copystr_ret /* if null, just return */
movl $ CPD_ACTIVE_THREAD,%ecx
movl %gs:(%ecx),%ecx /* get active thread */
- movl TH_TOP_ACT(%ecx),%ecx /* get thread->top_act */
movl ACT_MAP(%ecx),%ecx /* get act->map */
movl MAP_PMAP(%ecx),%ecx /* get map->pmap */
cmpl EXT(kernel_pmap), %ecx
subl %edi,%edx /
movl %edi,%ebx /* ebx = edi; */
- mov %es,%cx
- cmpl $ USER_DS,%cx /* If kernel data segment */
- jnz 0f /* skip check */
-
- cmpb $(CPUID_FAMILY_386), EXT(cpuid_family)
- ja 0f
-
- movl %cr3,%ecx /* point to page directory */
-#if NCPUS > 1
- andl $(~0x7), %ecx /* remove cpu number */
-#endif /* NCPUS > 1 && AT386 */
- movl %edi,%eax /* get page directory bits */
- shrl $(PDESHIFT),%eax /* from user address */
- movl KERNELBASE(%ecx,%eax,4),%ecx
- /* get page directory pointer */
- testl $(PTE_V),%ecx /* present? */
- jz 0f /* if not, fault is OK */
- andl $(PTE_PFN),%ecx /* isolate page frame address */
- movl %edi,%eax /* get page table bits */
- shrl $(PTESHIFT),%eax
- andl $(PTEMASK),%eax /* from user address */
- leal KERNELBASE(%ecx,%eax,4),%ecx
- /* point to page table entry */
- movl (%ecx),%eax /* get it */
- testl $(PTE_V),%eax /* present? */
- jz 0f /* if not, fault is OK */
- testl $(PTE_W),%eax /* writable? */
- jnz 0f /* OK if so */
-/*
- * Not writable - must fake a fault. Turn off access to the page.
- */
- andl $(PTE_INVALID),(%ecx) /* turn off valid bit */
- movl %cr3,%eax /* invalidate TLB */
- movl %eax,%cr3
-0:
/*
* Copy only what fits on the current destination page.
* Check for write-fault again on the next page.
.long 0,0,0,0
.text
-/*
- * Determine cpu model and set global cpuid_xxx variables
- *
- * Relies on 386 eflags bit 18 (AC) always being zero & 486 preserving it.
- * Relies on 486 eflags bit 21 (ID) always being zero & 586 preserving it.
- * Relies on CPUID instruction for next x86 generations
- * (assumes cpuid-family-homogenous MPs; else convert to per-cpu array)
- */
-
-ENTRY(set_cpu_model)
- FRAME
- pushl %ebx /* save ebx */
- andl $~0x3,%esp /* Align stack to avoid AC fault */
- pushfl /* push EFLAGS */
- popl %eax /* pop into eax */
- movl %eax,%ecx /* Save original EFLAGS */
- xorl $(EFL_AC+EFL_ID),%eax /* toggle ID,AC bits */
- pushl %eax /* push new value */
- popfl /* through the EFLAGS register */
- pushfl /* and back */
- popl %eax /* into eax */
- movb $(CPUID_FAMILY_386),EXT(cpuid_family)
- pushl %ecx /* push original EFLAGS */
- popfl /* restore EFLAGS */
- xorl %ecx,%eax /* see what changed */
- testl $ EFL_AC,%eax /* test AC bit */
- jz 0f /* if AC toggled (486 or higher) */
-
- movb $(CPUID_FAMILY_486),EXT(cpuid_family)
- testl $ EFL_ID,%eax /* test ID bit */
- jz 0f /* if ID toggled use cpuid instruction */
-
- xorl %eax,%eax /* get vendor identification string */
- .word 0xA20F /* cpuid instruction */
- movl %eax,EXT(cpuid_value) /* Store high value */
- movl %ebx,EXT(cpuid_vid) /* Store byte 0-3 of Vendor ID */
- movl %edx,EXT(cpuid_vid)+4 /* Store byte 4-7 of Vendor ID */
- movl %ecx,EXT(cpuid_vid)+8 /* Store byte 8-B of Vendor ID */
- movl $1,%eax /* get processor signature */
- .word 0xA20F /* cpuid instruction */
- movl %edx,EXT(cpuid_feature) /* Store feature flags */
- movl %eax,%ecx /* Save original signature */
- andb $0xF,%al /* Get Stepping ID */
- movb %al,EXT(cpuid_stepping) /* Save Stepping ID */
- movl %ecx,%eax /* Get original signature */
- shrl $4,%eax /* Shift Stepping ID */
- movl %eax,%ecx /* Save original signature */
- andb $0xF,%al /* Get Model */
- movb %al,EXT(cpuid_model) /* Save Model */
- movl %ecx,%eax /* Get original signature */
- shrl $4,%eax /* Shift Stepping ID */
- movl %eax,%ecx /* Save original signature */
- andb $0xF,%al /* Get Family */
- movb %al,EXT(cpuid_family) /* Save Family */
- movl %ecx,%eax /* Get original signature */
- shrl $4,%eax /* Shift Stepping ID */
- andb $0x3,%al /* Get Type */
- movb %al,EXT(cpuid_type) /* Save Type */
-
- movl EXT(cpuid_value),%eax /* Get high value */
- cmpl $2,%eax /* Test if processor configuration */
- jle 0f /* is present */
- movl $2,%eax /* get processor configuration */
- .word 0xA20F /* cpuid instruction */
- movl %eax,EXT(cpuid_cache) /* Store byte 0-3 of configuration */
- movl %ebx,EXT(cpuid_cache)+4 /* Store byte 4-7 of configuration */
- movl %ecx,EXT(cpuid_cache)+8 /* Store byte 8-B of configuration */
- movl %edx,EXT(cpuid_cache)+12 /* Store byte C-F of configuration */
-0:
- popl %ebx /* restore ebx */
- EMARF
- ret /* return */
-
ENTRY(get_cr0)
movl %cr0, %eax
ret
#endif /* NCPUS > 1 */
-/*
- * delay(microseconds)
- */
-
-ENTRY(delay)
- movl 4(%esp),%eax
- testl %eax, %eax
- jle 3f
- movl EXT(delaycount), %ecx
-1:
- movl %ecx, %edx
-2:
- decl %edx
- jne 2b
- decl %eax
- jne 1b
-3:
- ret
-
/*
* unsigned int
* div_scale(unsigned int dividend,
POP_FRAME
ret
-#if NCPUS > 1
-ENTRY(_cpu_number)
- CPU_NUMBER(%eax)
- ret
-#endif /* NCPUS > 1 */
-
#ifdef MACH_BSD
/*
* BSD System call entry point..
*/
Entry(trap_unix_syscall)
+trap_unix_addr:
pushf /* save flags as soon as possible */
+trap_unix_2:
pushl %eax /* save system call number */
pushl $0 /* clear trap number slot */
projects / apple / xnu.git / blobdiff