version 1.3, 2002/12/17 19:47:15 |
version 1.11.2.2, 2004/08/12 11:41:13 |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
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* @(#)locore.s 7.3 (Berkeley) 5/13/91 |
* @(#)locore.s 7.3 (Berkeley) 5/13/91 |
*/ |
*/ |
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#include "opt_compat_netbsd.h" |
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#include "opt_compat_oldboot.h" |
#include "opt_cputype.h" |
#include "opt_cputype.h" |
#include "opt_ddb.h" |
#include "opt_ddb.h" |
#include "opt_ipkdb.h" |
#include "opt_ipkdb.h" |
#include "opt_vm86.h" |
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#include "opt_user_ldt.h" |
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#include "opt_dummy_nops.h" |
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#include "opt_compat_oldboot.h" |
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#include "opt_multiprocessor.h" |
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#include "opt_lockdebug.h" |
#include "opt_lockdebug.h" |
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#include "opt_multiprocessor.h" |
#include "opt_realmem.h" |
#include "opt_realmem.h" |
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#include "opt_user_ldt.h" |
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#include "opt_vm86.h" |
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#include "npx.h" |
#include "npx.h" |
#include "assym.h" |
#include "assym.h" |
#include "apm.h" |
#include "apm.h" |
#include "lapic.h" |
#include "lapic.h" |
#include "ioapic.h" |
#include "ioapic.h" |
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#include "ksyms.h" |
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#include <sys/errno.h> |
#include <sys/errno.h> |
#include <sys/syscall.h> |
#include <sys/syscall.h> |
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#if defined(MULTIPROCESSOR) |
#if defined(MULTIPROCESSOR) |
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#define SET_CURPROC(proc,cpu) \ |
#define SET_CURLWP(lwp,cpu) \ |
movl CPUVAR(SELF),cpu ; \ |
movl CPUVAR(SELF),cpu ; \ |
movl proc,CPUVAR(CURPROC) ; \ |
movl lwp,CPUVAR(CURLWP) ; \ |
movl cpu,P_CPU(proc) |
movl cpu,L_CPU(lwp) |
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#else |
#else |
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#define SET_CURPROC(proc,tcpu) movl proc,CPUVAR(CURPROC) |
#define SET_CURLWP(lwp,tcpu) movl lwp,CPUVAR(CURLWP) |
#define GET_CURPROC(reg) movl CPUVAR(CURPROC),reg |
#define GET_CURLWP(reg) movl CPUVAR(CURLWP),reg |
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#endif |
#endif |
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#define GET_CURPCB(reg) movl CPUVAR(CURPCB),reg |
#define GET_CURPCB(reg) movl CPUVAR(CURPCB),reg |
#define SET_CURPCB(reg) movl reg,CPUVAR(CURPCB) |
#define SET_CURPCB(reg) movl reg,CPUVAR(CURPCB) |
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#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
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/* XXX temporary kluge; these should not be here */ |
/* XXX temporary kluge; these should not be here */ |
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* XXX 4 == sizeof pde |
* XXX 4 == sizeof pde |
*/ |
*/ |
.set _C_LABEL(PTmap),(PDSLOT_PTE << PDSHIFT) |
.set _C_LABEL(PTmap),(PDSLOT_PTE << PDSHIFT) |
.set _C_LABEL(PTD),(_C_LABEL(PTmap) + PDSLOT_PTE * NBPG) |
.set _C_LABEL(PTD),(_C_LABEL(PTmap) + PDSLOT_PTE * PAGE_SIZE) |
.set _C_LABEL(PTDpde),(_C_LABEL(PTD) + PDSLOT_PTE * 4) |
.set _C_LABEL(PTDpde),(_C_LABEL(PTD) + PDSLOT_PTE * 4) |
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/* |
/* |
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* XXX 4 == sizeof pde |
* XXX 4 == sizeof pde |
*/ |
*/ |
.set _C_LABEL(APTmap),(PDSLOT_APTE << PDSHIFT) |
.set _C_LABEL(APTmap),(PDSLOT_APTE << PDSHIFT) |
.set _C_LABEL(APTD),(_C_LABEL(APTmap) + PDSLOT_APTE * NBPG) |
.set _C_LABEL(APTD),(_C_LABEL(APTmap) + PDSLOT_APTE * PAGE_SIZE) |
.set _C_LABEL(APTDpde),(_C_LABEL(PTD) + PDSLOT_APTE * 4) |
.set _C_LABEL(APTDpde),(_C_LABEL(PTD) + PDSLOT_APTE * 4) |
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.data |
.data |
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.globl _C_LABEL(cpu) |
.globl _C_LABEL(cpu) |
.globl _C_LABEL(cpu_feature) |
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.globl _C_LABEL(esym),_C_LABEL(boothowto) |
.globl _C_LABEL(esym),_C_LABEL(boothowto) |
.globl _C_LABEL(bootinfo),_C_LABEL(atdevbase) |
.globl _C_LABEL(bootinfo),_C_LABEL(atdevbase) |
#ifdef COMPAT_OLDBOOT |
#ifdef COMPAT_OLDBOOT |
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#if NLAPIC > 0 |
#if NLAPIC > 0 |
#ifdef __ELF__ |
#ifdef __ELF__ |
.align NBPG |
.align PAGE_SIZE |
#else |
#else |
.align 12 |
.align 12 |
#endif |
#endif |
Line 214 _C_LABEL(lapic_tpr): |
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Line 210 _C_LABEL(lapic_tpr): |
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_C_LABEL(lapic_ppr): |
_C_LABEL(lapic_ppr): |
.space LAPIC_ISR-LAPIC_PPRI |
.space LAPIC_ISR-LAPIC_PPRI |
_C_LABEL(lapic_isr): |
_C_LABEL(lapic_isr): |
.space NBPG-LAPIC_ISR |
.space PAGE_SIZE-LAPIC_ISR |
#else |
#else |
_C_LABEL(lapic_tpr): |
_C_LABEL(lapic_tpr): |
.long 0 |
.long 0 |
Line 223 _C_LABEL(lapic_tpr): |
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Line 219 _C_LABEL(lapic_tpr): |
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_C_LABEL(cpu): .long 0 # are we 386, 386sx, or 486, |
_C_LABEL(cpu): .long 0 # are we 386, 386sx, or 486, |
# or Pentium, or.. |
# or Pentium, or.. |
_C_LABEL(cpu_feature): .long 0 # feature flags from 'cpuid' |
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# instruction |
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_C_LABEL(esym): .long 0 # ptr to end of syms |
_C_LABEL(esym): .long 0 # ptr to end of syms |
_C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual |
_C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual |
_C_LABEL(proc0paddr): .long 0 |
_C_LABEL(proc0paddr): .long 0 |
Line 244 _C_LABEL(biosextmem): .long REALEXTMEM |
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Line 238 _C_LABEL(biosextmem): .long REALEXTMEM |
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tmpstk: |
tmpstk: |
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#define _RELOC(x) ((x) - KERNBASE) |
#define _RELOC(x) ((x) - KERNBASE_LOCORE) |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
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.text |
.text |
Line 298 start: movw $0x1234,0x472 # warm boot |
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Line 292 start: movw $0x1234,0x472 # warm boot |
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movl 16(%esp),%eax |
movl 16(%esp),%eax |
testl %eax,%eax |
testl %eax,%eax |
jz 1f |
jz 1f |
addl $KERNBASE,%eax |
addl $KERNBASE_LOCORE,%eax |
1: movl %eax,RELOC(esym) |
1: movl %eax,RELOC(esym) |
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movl RELOC(biosextmem),%eax |
movl RELOC(biosextmem),%eax |
Line 506 try586: /* Use the `cpuid' instruction. |
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Line 500 try586: /* Use the `cpuid' instruction. |
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* text | data | bss | [syms] | page dir | proc0 kstack |
* text | data | bss | [syms] | page dir | proc0 kstack |
* 0 1 2 3 |
* 0 1 2 3 |
*/ |
*/ |
#define PROC0PDIR ((0) * NBPG) |
#define PROC0PDIR ((0) * PAGE_SIZE) |
#define PROC0STACK ((1) * NBPG) |
#define PROC0STACK ((1) * PAGE_SIZE) |
#define SYSMAP ((1+UPAGES) * NBPG) |
#define SYSMAP ((1+UPAGES) * PAGE_SIZE) |
#define TABLESIZE ((1+UPAGES) * NBPG) /* + nkpde * NBPG */ |
#define TABLESIZE ((1+UPAGES) * PAGE_SIZE) /* + nkpde * PAGE_SIZE */ |
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/* Find end of kernel image. */ |
/* Find end of kernel image. */ |
movl $RELOC(end),%edi |
movl $RELOC(end),%edi |
#if defined(DDB) && !defined(SYMTAB_SPACE) |
#if (NKSYMS || defined(DDB) || defined(LKM)) && !defined(SYMTAB_SPACE) |
/* Save the symbols (if loaded). */ |
/* Save the symbols (if loaded). */ |
movl RELOC(esym),%eax |
movl RELOC(esym),%eax |
testl %eax,%eax |
testl %eax,%eax |
jz 1f |
jz 1f |
subl $KERNBASE,%eax |
subl $KERNBASE_LOCORE,%eax |
movl %eax,%edi |
movl %eax,%edi |
1: |
1: |
#endif |
#endif |
Line 530 try586: /* Use the `cpuid' instruction. |
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Line 524 try586: /* Use the `cpuid' instruction. |
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/* |
/* |
* Calculate the size of the kernel page table directory, and |
* Calculate the size of the kernel page table directory, and |
* how many entries it will have. |
* how many entries it will have. Adjust nkpde to the actual |
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* kernel size automatically. Account for the bootstrap tables, |
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* round up, and add an extra 4MB. |
*/ |
*/ |
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leal TABLESIZE+NBPD+PDOFSET(%edi),%eax |
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shrl $PDSHIFT,%eax |
movl RELOC(nkpde),%ecx # get nkpde |
movl RELOC(nkpde),%ecx # get nkpde |
cmpl $NKPTP_MIN,%ecx # larger than min? |
cmpl %ecx,%eax |
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jb 1f |
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movl %eax,%ecx |
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1: cmpl $NKPTP_MIN,%ecx # larger than min? |
jge 1f |
jge 1f |
movl $NKPTP_MIN,%ecx # set at min |
movl $NKPTP_MIN,%ecx # set at min |
jmp 2f |
jmp 2f |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
jle 2f |
jle 2f |
movl $NKPTP_MAX,%ecx |
movl $NKPTP_MAX,%ecx |
2: |
2: movl %ecx,RELOC(nkpde) |
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/* Clear memory for bootstrap tables. */ |
/* Clear memory for bootstrap tables. */ |
shll $PGSHIFT,%ecx |
shll $PGSHIFT,%ecx |
Line 561 try586: /* Use the `cpuid' instruction. |
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Line 562 try586: /* Use the `cpuid' instruction. |
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*/ |
*/ |
#define fillkpt \ |
#define fillkpt \ |
1: movl %eax,(%ebx) ; \ |
1: movl %eax,(%ebx) ; \ |
addl $NBPG,%eax ; /* increment physical address */ \ |
addl $PAGE_SIZE,%eax ; /* increment physical address */ \ |
addl $4,%ebx ; /* next pte */ \ |
addl $4,%ebx ; /* next pte */ \ |
loop 1b ; |
loop 1b ; |
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Line 634 try586: /* Use the `cpuid' instruction. |
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Line 635 try586: /* Use the `cpuid' instruction. |
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ret |
ret |
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begin: |
begin: |
/* Now running relocated at KERNBASE. Remove double mapping. */ |
/* Now running relocated at KERNBASE_LOCORE. Remove double mapping. */ |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
addl $(KERNBASE), %ebx # now use relocated address |
addl $(KERNBASE_LOCORE), %ebx # now use relocated address |
1: movl $0,(%ebx) |
1: movl $0,(%ebx) |
addl $4,%ebx # next pde |
addl $4,%ebx # next pde |
loop 1b |
loop 1b |
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/* Relocate atdevbase. */ |
/* Relocate atdevbase. */ |
movl _C_LABEL(nkpde),%edx |
movl _C_LABEL(nkpde),%edx |
shll $PGSHIFT,%edx |
shll $PGSHIFT,%edx |
addl $(TABLESIZE+KERNBASE),%edx |
addl $(TABLESIZE+KERNBASE_LOCORE),%edx |
addl %esi,%edx |
addl %esi,%edx |
movl %edx,_C_LABEL(atdevbase) |
movl %edx,_C_LABEL(atdevbase) |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (PROC0STACK+KERNBASE)(%esi),%eax |
leal (PROC0STACK+KERNBASE_LOCORE)(%esi),%eax |
movl %eax,_C_LABEL(proc0paddr) |
movl %eax,_C_LABEL(proc0paddr) |
leal (USPACE-FRAMESIZE)(%eax),%esp |
leal (USPACE-FRAMESIZE)(%eax),%esp |
movl %esi,PCB_CR3(%eax) # pcb->pcb_cr3 |
movl %esi,PCB_CR3(%eax) # pcb->pcb_cr3 |
Line 707 NENTRY(proc_trampoline) |
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Line 708 NENTRY(proc_trampoline) |
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pushl %ebx |
pushl %ebx |
call *%esi |
call *%esi |
addl $4,%esp |
addl $4,%esp |
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DO_DEFERRED_SWITCH(%eax) |
INTRFASTEXIT |
INTRFASTEXIT |
/* NOTREACHED */ |
/* NOTREACHED */ |
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/*****************************************************************************/ |
/*****************************************************************************/ |
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#ifdef COMPAT_16 |
/* |
/* |
* Signal trampoline; copied to top of user stack. |
* Signal trampoline; copied to top of user stack. |
*/ |
*/ |
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leal 12(%esp),%eax # get pointer to sigcontext |
leal 12(%esp),%eax # get pointer to sigcontext |
movl %eax,4(%esp) # put it in the argument slot |
movl %eax,4(%esp) # put it in the argument slot |
# fake return address already there |
# fake return address already there |
movl $SYS___sigreturn14,%eax |
movl $SYS_compat_16___sigreturn14,%eax |
int $0x80 # enter kernel with args on stack |
int $0x80 # enter kernel with args on stack |
movl $SYS_exit,%eax |
movl $SYS_exit,%eax |
int $0x80 # exit if sigreturn fails |
int $0x80 # exit if sigreturn fails |
.globl _C_LABEL(esigcode) |
.globl _C_LABEL(esigcode) |
_C_LABEL(esigcode): |
_C_LABEL(esigcode): |
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#endif |
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/*****************************************************************************/ |
/*****************************************************************************/ |
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pushl %edi |
pushl %edi |
GET_CURPCB(%eax) # load curpcb into eax and set on-fault |
GET_CURPCB(%eax) # load curpcb into eax and set on-fault |
pushl PCB_ONFAULT(%eax) |
pushl PCB_ONFAULT(%eax) |
movl $_C_LABEL(copy_fault), PCB_ONFAULT(%eax) |
movl $_C_LABEL(kcopy_fault), PCB_ONFAULT(%eax) |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
Line 870 _C_LABEL(copyin_func): |
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Line 873 _C_LABEL(copyin_func): |
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*/ |
*/ |
/* LINTSTUB: Func: int copyout(const void *kaddr, void *uaddr, size_t len) */ |
/* LINTSTUB: Func: int copyout(const void *kaddr, void *uaddr, size_t len) */ |
ENTRY(copyout) |
ENTRY(copyout) |
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DO_DEFERRED_SWITCH(%eax) |
jmp *_C_LABEL(copyout_func) |
jmp *_C_LABEL(copyout_func) |
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#if defined(I386_CPU) |
#if defined(I386_CPU) |
Line 1011 ENTRY(i486_copyout) |
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Line 1015 ENTRY(i486_copyout) |
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*/ |
*/ |
/* LINTSTUB: Func: int copyin(const void *uaddr, void *kaddr, size_t len) */ |
/* LINTSTUB: Func: int copyin(const void *uaddr, void *kaddr, size_t len) */ |
ENTRY(copyin) |
ENTRY(copyin) |
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DO_DEFERRED_SWITCH(%eax) |
jmp *_C_LABEL(copyin_func) |
jmp *_C_LABEL(copyin_func) |
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#if defined(I386_CPU) || defined(I486_CPU) || defined(I586_CPU) || \ |
#if defined(I386_CPU) || defined(I486_CPU) || defined(I586_CPU) || \ |
Line 1061 ENTRY(i386_copyin) |
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Line 1066 ENTRY(i386_copyin) |
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NENTRY(copy_efault) |
NENTRY(copy_efault) |
movl $EFAULT,%eax |
movl $EFAULT,%eax |
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/* |
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* kcopy_fault is used by kcopy and copy_fault is used by copyin/out. |
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* |
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* they're distinguished for lazy pmap switching. see trap(). |
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*/ |
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/* LINTSTUB: Ignore */ |
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NENTRY(kcopy_fault) |
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GET_CURPCB(%edx) |
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popl PCB_ONFAULT(%edx) |
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popl %edi |
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popl %esi |
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ret |
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/* LINTSTUB: Ignore */ |
/* LINTSTUB: Ignore */ |
NENTRY(copy_fault) |
NENTRY(copy_fault) |
GET_CURPCB(%edx) |
GET_CURPCB(%edx) |
Line 1082 ENTRY(copyoutstr) |
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Line 1100 ENTRY(copyoutstr) |
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pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
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DO_DEFERRED_SWITCH(%eax) |
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movl 12(%esp),%esi # esi = from |
movl 12(%esp),%esi # esi = from |
movl 16(%esp),%edi # edi = to |
movl 16(%esp),%edi # edi = to |
movl 20(%esp),%edx # edx = maxlen |
movl 20(%esp),%edx # edx = maxlen |
Line 1095 ENTRY(copyoutstr) |
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Line 1115 ENTRY(copyoutstr) |
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/* Compute number of bytes in first page. */ |
/* Compute number of bytes in first page. */ |
movl %edi,%eax |
movl %edi,%eax |
andl $PGOFSET,%eax |
andl $PGOFSET,%eax |
movl $NBPG,%ecx |
movl $PAGE_SIZE,%ecx |
subl %eax,%ecx # ecx = NBPG - (src % NBPG) |
subl %eax,%ecx # ecx = PAGE_SIZE - (src % PAGE_SIZE) |
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GET_CURPCB(%eax) |
GET_CURPCB(%eax) |
movl $6f,PCB_ONFAULT(%eax) |
movl $6f,PCB_ONFAULT(%eax) |
Line 1143 ENTRY(copyoutstr) |
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Line 1163 ENTRY(copyoutstr) |
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jmp copystr_return |
jmp copystr_return |
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4: /* Go to next page, if any. */ |
4: /* Go to next page, if any. */ |
movl $NBPG,%ecx |
movl $PAGE_SIZE,%ecx |
testl %edx,%edx |
testl %edx,%edx |
jnz 1b |
jnz 1b |
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Line 1199 ENTRY(copyoutstr) |
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Line 1219 ENTRY(copyoutstr) |
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ENTRY(copyinstr) |
ENTRY(copyinstr) |
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
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DO_DEFERRED_SWITCH(%eax) |
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GET_CURPCB(%ecx) |
GET_CURPCB(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
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*/ |
*/ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
ENTRY(fuword) |
ENTRY(fuword) |
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DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
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*/ |
*/ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
ENTRY(fusword) |
ENTRY(fusword) |
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DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
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*/ |
*/ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
ENTRY(fuswintr) |
ENTRY(fuswintr) |
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cmpl $TLBSTATE_VALID, CPUVAR(TLBSTATE) |
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jnz _C_LABEL(fusuaddrfault) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
movl CPUVAR(CURPROC),%ecx |
movl CPUVAR(CURLWP),%ecx |
movl P_ADDR(%ecx),%ecx |
movl L_ADDR(%ecx),%ecx |
movl $_C_LABEL(fusubail),PCB_ONFAULT(%ecx) |
movl $_C_LABEL(fusubail),PCB_ONFAULT(%ecx) |
movzwl (%edx),%eax |
movzwl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
Line 1360 ENTRY(fuswintr) |
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Line 1387 ENTRY(fuswintr) |
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*/ |
*/ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
ENTRY(fubyte) |
ENTRY(fubyte) |
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DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1404 NENTRY(fusuaddrfault) |
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Line 1432 NENTRY(fusuaddrfault) |
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*/ |
*/ |
/* LINTSTUB: Func: int suword(void *base, long c) */ |
/* LINTSTUB: Func: int suword(void *base, long c) */ |
ENTRY(suword) |
ENTRY(suword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int susword(void *base, short c) */ |
/* LINTSTUB: Func: int susword(void *base, short c) */ |
ENTRY(susword) |
ENTRY(susword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int suswintr(void *base, short c) */ |
/* LINTSTUB: Func: int suswintr(void *base, short c) */ |
ENTRY(suswintr) |
ENTRY(suswintr) |
|
cmpl $TLBSTATE_VALID, CPUVAR(TLBSTATE) |
|
jnz _C_LABEL(fusuaddrfault) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
movl CPUVAR(CURPROC),%ecx |
movl CPUVAR(CURLWP),%ecx |
movl P_ADDR(%ecx),%ecx |
movl L_ADDR(%ecx),%ecx |
movl $_C_LABEL(fusubail),PCB_ONFAULT(%ecx) |
movl $_C_LABEL(fusubail),PCB_ONFAULT(%ecx) |
|
|
#if defined(I386_CPU) |
#if defined(I386_CPU) |
Line 1536 ENTRY(suswintr) |
|
Line 1568 ENTRY(suswintr) |
|
*/ |
*/ |
/* LINTSTUB: Func: int subyte(void *base, int c) */ |
/* LINTSTUB: Func: int subyte(void *base, int c) */ |
ENTRY(subyte) |
ENTRY(subyte) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1659 NENTRY(switch_error) |
|
Line 1692 NENTRY(switch_error) |
|
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
|
|
/* |
/* |
* void cpu_switch(struct proc *) |
* void cpu_switch(struct lwp *) |
* Find a runnable process and switch to it. Wait if necessary. If the new |
* Find a runnable process and switch to it. Wait if necessary. If the new |
* process is the same as the old one, we short-circuit the context save and |
* process is the same as the old one, we short-circuit the context save and |
* restore. |
* restore. |
* |
* |
* Note that the stack frame layout is known to "struct switchframe" |
* Note that the stack frame layout is known to "struct switchframe" |
* in <machine/frame.h> and to the code in cpu_fork() which initializes |
* in <machine/frame.h> and to the code in cpu_fork() which initializes |
* it for a new process. |
* it for a new lwp. |
*/ |
*/ |
ENTRY(cpu_switch) |
ENTRY(cpu_switch) |
pushl %ebx |
pushl %ebx |
Line 1676 ENTRY(cpu_switch) |
|
Line 1709 ENTRY(cpu_switch) |
|
#ifdef DEBUG |
#ifdef DEBUG |
cmpl $IPL_SCHED,CPUVAR(ILEVEL) |
cmpl $IPL_SCHED,CPUVAR(ILEVEL) |
jae 1f |
jae 1f |
pushl 2f |
pushl $2f |
call _C_LABEL(panic) |
call _C_LABEL(panic) |
/* NOTREACHED */ |
/* NOTREACHED */ |
2: .asciz "not splhigh() in cpu_switch!" |
2: .asciz "not splsched() in cpu_switch!" |
|
|
1: |
1: |
#endif /* DEBUG */ |
#endif /* DEBUG */ |
|
|
movl CPUVAR(CURPROC),%esi |
movl 16(%esp),%esi # current |
|
|
/* |
/* |
* Clear curproc so that we don't accumulate system time while idle. |
* Clear curlwp so that we don't accumulate system time while idle. |
* This also insures that schedcpu() will move the old process to |
* This also insures that schedcpu() will move the old lwp to |
* the correct queue if it happens to get called from the spllower() |
* the correct queue if it happens to get called from the spllower() |
* below and changes the priority. (See corresponding comment in |
* below and changes the priority. (See corresponding comment in |
* userret()). |
* userret()). |
*/ |
*/ |
movl $0,CPUVAR(CURPROC) |
movl $0,CPUVAR(CURLWP) |
/* |
/* |
* First phase: find new process. |
* First phase: find new lwp. |
* |
* |
* Registers: |
* Registers: |
* %eax - queue head, scratch, then zero |
* %eax - queue head, scratch, then zero |
* %ebx - queue number |
* %ebx - queue number |
* %ecx - cached value of whichqs |
* %ecx - cached value of whichqs |
* %edx - next process in queue |
* %edx - next lwp in queue |
* %esi - old process |
* %esi - old lwp |
* %edi - new process |
* %edi - new lwp |
*/ |
*/ |
|
|
/* Look for new process. */ |
/* Look for new lwp. */ |
cli # splhigh doesn't do a cli |
cli # splhigh doesn't do a cli |
movl _C_LABEL(sched_whichqs),%ecx |
movl _C_LABEL(sched_whichqs),%ecx |
bsfl %ecx,%ebx # find a full q |
bsfl %ecx,%ebx # find a full q |
Line 1717 ENTRY(cpu_switch) |
|
Line 1749 ENTRY(cpu_switch) |
|
* |
* |
* Registers: |
* Registers: |
* %eax, %ecx - scratch |
* %eax, %ecx - scratch |
* %esi - old process, then old pcb |
* %esi - old lwp, then old pcb |
* %edi - idle pcb |
* %edi - idle pcb |
*/ |
*/ |
|
|
pushl %esi |
pushl %esi |
call _C_LABEL(pmap_deactivate) # pmap_deactivate(oldproc) |
call _C_LABEL(pmap_deactivate2) # pmap_deactivate(oldproc) |
addl $4,%esp |
addl $4,%esp |
|
|
movl P_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
|
|
/* Save stack pointers. */ |
/* Save stack pointers. */ |
movl %esp,PCB_ESP(%esi) |
movl %esp,PCB_ESP(%esi) |
Line 1733 ENTRY(cpu_switch) |
|
Line 1765 ENTRY(cpu_switch) |
|
|
|
/* Find idle PCB for this CPU */ |
/* Find idle PCB for this CPU */ |
#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
movl $_C_LABEL(proc0),%ebx |
movl $_C_LABEL(lwp0),%ebx |
movl P_ADDR(%ebx),%edi |
movl L_ADDR(%ebx),%edi |
movl P_MD_TSS_SEL(%ebx),%edx |
movl L_MD_TSS_SEL(%ebx),%edx |
#else |
#else |
movl CPUVAR(IDLE_PCB),%edi |
movl CPUVAR(IDLE_PCB),%edi |
movl CPUVAR(IDLE_TSS_SEL),%edx |
movl CPUVAR(IDLE_TSS_SEL),%edx |
#endif |
#endif |
movl $0,CPUVAR(CURPROC) /* In case we fault... */ |
movl $0,CPUVAR(CURLWP) /* In case we fault... */ |
|
|
/* Restore the idle context (avoid interrupts) */ |
/* Restore the idle context (avoid interrupts) */ |
cli |
cli |
Line 1749 ENTRY(cpu_switch) |
|
Line 1781 ENTRY(cpu_switch) |
|
movl PCB_ESP(%edi),%esp |
movl PCB_ESP(%edi),%esp |
movl PCB_EBP(%edi),%ebp |
movl PCB_EBP(%edi),%ebp |
|
|
|
|
/* Switch address space. */ |
|
movl PCB_CR3(%edi),%ecx |
|
movl %ecx,%cr3 |
|
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
movl %cr3,%eax |
|
movl %eax,PCB_CR3(%edi) |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
|
|
jz idle_loop |
jz idle_loop |
idle_exit: |
idle_exit: |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
|
sti |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_lock_idle) |
call _C_LABEL(sched_lock_idle) |
#endif |
#endif |
Line 1818 switch_dequeue: |
|
Line 1848 switch_dequeue: |
|
sti |
sti |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
|
|
movl P_FORW(%eax),%edi # unlink from front of process q |
movl L_FORW(%eax),%edi # unlink from front of process q |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
cmpl %edi,%eax # linked to self (i.e. nothing queued)? |
cmpl %edi,%eax # linked to self (i.e. nothing queued)? |
je _C_LABEL(switch_error) # not possible |
je _C_LABEL(switch_error) # not possible |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
movl P_FORW(%edi),%edx |
movl L_FORW(%edi),%edx |
movl %edx,P_FORW(%eax) |
movl %edx,L_FORW(%eax) |
movl %eax,P_BACK(%edx) |
movl %eax,L_BACK(%edx) |
|
|
cmpl %edx,%eax # q empty? |
cmpl %edx,%eax # q empty? |
jne 3f |
jne 3f |
Line 1837 switch_dequeue: |
|
Line 1867 switch_dequeue: |
|
xorl %eax,%eax |
xorl %eax,%eax |
CLEAR_RESCHED(%eax) |
CLEAR_RESCHED(%eax) |
|
|
|
switch_resume: |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
cmpl %eax,P_WCHAN(%edi) # Waiting for something? |
cmpl %eax,L_WCHAN(%edi) # Waiting for something? |
jne _C_LABEL(switch_error) # Yes; shouldn't be queued. |
jne _C_LABEL(switch_error) # Yes; shouldn't be queued. |
cmpb $SRUN,P_STAT(%edi) # In run state? |
cmpb $LSRUN,L_STAT(%edi) # In run state? |
jne _C_LABEL(switch_error) # No; shouldn't be queued. |
jne _C_LABEL(switch_error) # No; shouldn't be queued. |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
|
|
/* Isolate process. XXX Is this necessary? */ |
/* Isolate lwp. XXX Is this necessary? */ |
movl %eax,P_BACK(%edi) |
movl %eax,L_BACK(%edi) |
|
|
/* Record new process. */ |
/* Record new lwp. */ |
movb $SONPROC,P_STAT(%edi) # p->p_stat = SONPROC |
movb $LSONPROC,L_STAT(%edi) # l->l_stat = LSONPROC |
SET_CURPROC(%edi,%ecx) |
SET_CURLWP(%edi,%ecx) |
|
|
/* Skip context switch if same process. */ |
/* Skip context switch if same lwp. */ |
|
xorl %ebx,%ebx |
cmpl %edi,%esi |
cmpl %edi,%esi |
je switch_return |
je switch_return |
|
|
/* If old process exited, don't bother. */ |
/* If old lwp exited, don't bother. */ |
testl %esi,%esi |
testl %esi,%esi |
jz switch_exited |
jz switch_exited |
|
|
Line 1864 switch_dequeue: |
|
Line 1896 switch_dequeue: |
|
* |
* |
* Registers: |
* Registers: |
* %eax, %ecx - scratch |
* %eax, %ecx - scratch |
* %esi - old process, then old pcb |
* %esi - old lwp, then old pcb |
* %edi - new process |
* %edi - new lwp |
*/ |
*/ |
|
|
pushl %esi |
pushl %esi |
call _C_LABEL(pmap_deactivate) # pmap_deactivate(oldproc) |
call _C_LABEL(pmap_deactivate2) # pmap_deactivate(oldproc) |
addl $4,%esp |
addl $4,%esp |
|
|
movl P_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
|
|
/* Save stack pointers. */ |
/* Save stack pointers. */ |
movl %esp,PCB_ESP(%esi) |
movl %esp,PCB_ESP(%esi) |
|
|
* Registers: |
* Registers: |
* %eax, %ebx, %ecx, %edx - scratch |
* %eax, %ebx, %ecx, %edx - scratch |
* %esi - new pcb |
* %esi - new pcb |
* %edi - new process |
* %edi - new lwp |
*/ |
*/ |
|
|
/* No interrupts while loading new state. */ |
/* No interrupts while loading new state. */ |
cli |
cli |
movl P_ADDR(%edi),%esi |
movl L_ADDR(%edi),%esi |
|
|
/* Restore stack pointers. */ |
/* Restore stack pointers. */ |
movl PCB_ESP(%esi),%esp |
movl PCB_ESP(%esi),%esp |
|
|
|
|
#if 0 |
#if 0 |
/* Don't bother with the rest if switching to a system process. */ |
/* Don't bother with the rest if switching to a system process. */ |
testl $P_SYSTEM,P_FLAG(%edi) |
testl $P_SYSTEM,L_FLAG(%edi); XXX NJWLWP lwp's don't have P_SYSTEM! |
jnz switch_restored |
jnz switch_restored |
#endif |
#endif |
|
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
movl %cr3,%eax |
|
movl %eax,PCB_CR3(%esi) /* XXX should be done by pmap_activate? */ |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
/* Load TSS info. */ |
/* Load TSS info. */ |
movl _C_LABEL(gdt),%eax |
movl _C_LABEL(gdt),%eax |
#endif |
#endif |
movl P_MD_TSS_SEL(%edi),%edx |
movl L_MD_TSS_SEL(%edi),%edx |
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
andl $~0x0200,4(%eax,%edx, 1) |
andl $~0x0200,4(%eax,%edx, 1) |
ltr %dx |
ltr %dx |
|
|
Line 1925 switch_restored: |
|
Line 1959 switch_restored: |
|
movl PCB_CR0(%esi),%ecx |
movl PCB_CR0(%esi),%ecx |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
/* |
/* |
* If our floating point registers are on a different cpu, |
* If our floating point registers are on a different CPU, |
* clear CR0_TS so we'll trap rather than reuse bogus state. |
* clear CR0_TS so we'll trap rather than reuse bogus state. |
*/ |
*/ |
movl PCB_FPCPU(%esi),%ebx |
movl PCB_FPCPU(%esi),%ebx |
Line 1944 switch_restored: |
|
Line 1978 switch_restored: |
|
|
|
/* |
/* |
* Check for restartable atomic sequences (RAS) |
* Check for restartable atomic sequences (RAS) |
* XXX %edi reloads are not necessary here as %edi is callee-saved! |
|
*/ |
*/ |
movl CPUVAR(CURPROC),%edi |
movl CPUVAR(CURLWP),%edi |
cmpl $0,P_NRAS(%edi) |
movl L_PROC(%edi),%esi |
je 1f |
cmpl $0,P_RASLIST(%esi) |
movl P_MD_REGS(%edi),%edx |
jne 2f |
movl TF_EIP(%edx),%eax |
|
pushl %eax |
|
pushl %edi |
|
call _C_LABEL(ras_lookup) |
|
addl $8,%esp |
|
cmpl $-1,%eax |
|
je 1f |
|
movl CPUVAR(CURPROC),%edi |
|
movl P_MD_REGS(%edi),%edx |
|
movl %eax,TF_EIP(%edx) |
|
1: |
1: |
|
movl $1,%ebx |
|
|
switch_return: |
switch_return: |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_unlock_idle) |
call _C_LABEL(sched_unlock_idle) |
#endif |
#endif |
|
cmpl $0,CPUVAR(IPENDING) |
|
jz 3f |
pushl $IPL_NONE # spl0() |
pushl $IPL_NONE # spl0() |
call _C_LABEL(Xspllower) # process pending interrupts |
call _C_LABEL(Xspllower) # process pending interrupts |
addl $4,%esp |
addl $4,%esp |
|
3: |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh() |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh() |
|
|
|
movl %ebx,%eax |
|
|
movl %edi,%eax # return (p); |
|
popl %edi |
popl %edi |
popl %esi |
popl %esi |
popl %ebx |
popl %ebx |
ret |
ret |
|
|
|
2: # check RAS list |
|
movl L_MD_REGS(%edi),%ebx |
|
movl TF_EIP(%ebx),%eax |
|
pushl %eax |
|
pushl %esi |
|
call _C_LABEL(ras_lookup) |
|
addl $8,%esp |
|
cmpl $-1,%eax |
|
je 1b |
|
movl %eax,TF_EIP(%ebx) |
|
jmp 1b |
|
|
|
/* |
|
* void cpu_switchto(struct lwp *current, struct lwp *next) |
|
* Switch to the specified next LWP. |
|
*/ |
|
ENTRY(cpu_switchto) |
|
pushl %ebx |
|
pushl %esi |
|
pushl %edi |
|
|
|
#ifdef DEBUG |
|
cmpl $IPL_SCHED,CPUVAR(ILEVEL) |
|
jae 1f |
|
pushl $2f |
|
call _C_LABEL(panic) |
|
/* NOTREACHED */ |
|
2: .asciz "not splsched() in cpu_switchto!" |
|
1: |
|
#endif /* DEBUG */ |
|
|
|
movl 16(%esp),%esi # current |
|
movl 20(%esp),%edi # next |
|
|
|
/* |
|
* Clear curlwp so that we don't accumulate system time while idle. |
|
* This also insures that schedcpu() will move the old process to |
|
* the correct queue if it happens to get called from the spllower() |
|
* below and changes the priority. (See corresponding comment in |
|
* usrret()). |
|
* |
|
* XXX Is this necessary? We know we won't go idle. |
|
*/ |
|
movl $0,CPUVAR(CURLWP) |
|
|
|
/* |
|
* We're running at splhigh(), but it's otherwise okay to take |
|
* interrupts here. |
|
*/ |
|
sti |
|
|
|
/* Jump into the middle of cpu_switch */ |
|
xorl %eax,%eax |
|
jmp switch_resume |
|
|
/* |
/* |
* void switch_exit(struct proc *p); |
* void cpu_exit(struct lwp *l) |
* switch_exit(struct proc *p); |
* Switch to the appropriate idle context (lwp0's if uniprocessor; the CPU's |
* Switch to the appropriate idle context (proc0's if uniprocessor; the cpu's |
|
* if multiprocessor) and deallocate the address space and kernel stack for p. |
* if multiprocessor) and deallocate the address space and kernel stack for p. |
* Then jump into cpu_switch(), as if we were in the idle proc all along. |
* Then jump into cpu_switch(), as if we were in the idle proc all along. |
*/ |
*/ |
#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
.globl _C_LABEL(proc0) |
.globl _C_LABEL(lwp0) |
#endif |
#endif |
.globl _C_LABEL(uvmspace_free),_C_LABEL(kernel_map) |
.globl _C_LABEL(uvmspace_free),_C_LABEL(kernel_map) |
.globl _C_LABEL(uvm_km_free),_C_LABEL(tss_free) |
.globl _C_LABEL(uvm_km_free),_C_LABEL(tss_free) |
/* LINTSTUB: Func: void switch_exit(struct proc *p) */ |
/* LINTSTUB: Func: void cpu_exit(struct lwp *l) */ |
ENTRY(switch_exit) |
ENTRY(cpu_exit) |
movl 4(%esp),%edi # old process |
movl 4(%esp),%edi # old process |
#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
movl $_C_LABEL(proc0),%ebx |
movl $_C_LABEL(lwp0),%ebx |
movl P_ADDR(%ebx),%esi |
movl L_ADDR(%ebx),%esi |
movl P_MD_TSS_SEL(%ebx),%edx |
movl L_MD_TSS_SEL(%ebx),%edx |
#else |
#else |
movl CPUVAR(IDLE_PCB),%esi |
movl CPUVAR(IDLE_PCB),%esi |
movl CPUVAR(IDLE_TSS_SEL),%edx |
movl CPUVAR(IDLE_TSS_SEL),%edx |
#endif |
#endif |
/* In case we fault... */ |
/* In case we fault... */ |
movl $0,CPUVAR(CURPROC) |
movl $0,CPUVAR(CURLWP) |
|
|
/* Restore the idle context. */ |
/* Restore the idle context. */ |
cli |
cli |
Line 2010 ENTRY(switch_exit) |
|
Line 2092 ENTRY(switch_exit) |
|
movl PCB_ESP(%esi),%esp |
movl PCB_ESP(%esi),%esp |
movl PCB_EBP(%esi),%ebp |
movl PCB_EBP(%esi),%ebp |
|
|
/* Load TSS info. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
movl %cr3,%eax |
|
movl %eax,PCB_CR3(%esi) |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
Line 2018 ENTRY(switch_exit) |
|
Line 2102 ENTRY(switch_exit) |
|
movl _C_LABEL(gdt),%eax |
movl _C_LABEL(gdt),%eax |
#endif |
#endif |
|
|
/* Switch address space. */ |
|
movl PCB_CR3(%esi),%ecx |
|
movl %ecx,%cr3 |
|
|
|
/* Switch TSS. */ |
|
andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
ltr %dx |
ltr %dx |
|
|
Line 2039 ENTRY(switch_exit) |
|
Line 2118 ENTRY(switch_exit) |
|
sti |
sti |
|
|
/* |
/* |
* Schedule the dead process's vmspace and stack to be freed. |
* Schedule the dead LWP's stack to be freed. |
*/ |
*/ |
pushl %edi /* exit2(p) */ |
pushl %edi |
call _C_LABEL(exit2) |
call _C_LABEL(lwp_exit2) |
addl $4,%esp |
addl $4,%esp |
|
|
/* Jump into cpu_switch() with the right state. */ |
/* Jump into cpu_switch() with the right state. */ |
xorl %esi,%esi |
xorl %esi,%esi |
movl %esi,CPUVAR(CURPROC) |
movl %esi,CPUVAR(CURLWP) |
jmp idle_start |
jmp idle_start |
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/* |
/* |
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INTRENTRY |
INTRENTRY |
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#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
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cmpl $0, CPUVAR(WANT_PMAPLOAD) |
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jz 1f |
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pushl $6f |
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call _C_LABEL(printf) |
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addl $4, %esp |
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1: |
movl CPUVAR(ILEVEL),%ebx |
movl CPUVAR(ILEVEL),%ebx |
testl %ebx,%ebx |
testl %ebx,%ebx |
jz 1f |
jz 1f |
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#endif |
#endif |
1: |
1: |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
movl CPUVAR(CURPROC),%edx |
movl CPUVAR(CURLWP),%edx |
movl %esp,P_MD_REGS(%edx) # save pointer to frame |
movl %esp,L_MD_REGS(%edx) # save pointer to frame |
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movl L_PROC(%edx),%edx |
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pushl %esp |
call *P_MD_SYSCALL(%edx) # get pointer to syscall() function |
call *P_MD_SYSCALL(%edx) # get pointer to syscall() function |
2: /* Check for ASTs on exit to user mode. */ |
addl $4,%esp |
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.Lsyscall_checkast: |
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/* Check for ASTs on exit to user mode. */ |
cli |
cli |
CHECK_ASTPENDING() |
CHECK_ASTPENDING(%eax) |
je 1f |
je 1f |
/* Always returning to user mode here. */ |
/* Always returning to user mode here. */ |
CLEAR_ASTPENDING() |
CLEAR_ASTPENDING(%eax) |
sti |
sti |
/* Pushed T_ASTFLT into tf_trapno on entry. */ |
/* Pushed T_ASTFLT into tf_trapno on entry. */ |
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pushl %esp |
call _C_LABEL(trap) |
call _C_LABEL(trap) |
jmp 2b |
addl $4,%esp |
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jmp .Lsyscall_checkast /* re-check ASTs */ |
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1: CHECK_DEFERRED_SWITCH(%eax) |
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jnz 9f |
#ifndef DIAGNOSTIC |
#ifndef DIAGNOSTIC |
1: INTRFASTEXIT |
INTRFASTEXIT |
#else /* DIAGNOSTIC */ |
#else /* DIAGNOSTIC */ |
1: cmpl $IPL_NONE,CPUVAR(ILEVEL) |
cmpl $IPL_NONE,CPUVAR(ILEVEL) |
jne 3f |
jne 3f |
INTRFASTEXIT |
INTRFASTEXIT |
3: sti |
3: sti |
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jmp 2b |
jmp 2b |
4: .asciz "WARNING: SPL NOT LOWERED ON SYSCALL EXIT\n" |
4: .asciz "WARNING: SPL NOT LOWERED ON SYSCALL EXIT\n" |
5: .asciz "WARNING: SPL NOT ZERO ON SYSCALL ENTRY\n" |
5: .asciz "WARNING: SPL NOT ZERO ON SYSCALL ENTRY\n" |
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6: .asciz "WARNING: WANT PMAPLOAD ON SYSCALL ENTRY\n" |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
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9: sti |
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call _C_LABEL(pmap_load) |
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jmp .Lsyscall_checkast /* re-check ASTs */ |
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#if NNPX > 0 |
#if NNPX > 0 |
/* |
/* |