version 1.7, 2003/04/08 23:48:48 |
version 1.34, 2005/04/01 11:59:31 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/*- |
/*- |
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. |
* Copyright (c) 1998, 2000, 2004 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* This code is derived from software contributed to The NetBSD Foundation |
* This code is derived from software contributed to The NetBSD Foundation |
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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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#include <machine/asm.h> |
#include <machine/asm.h> |
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#if defined(MULTIPROCESSOR) |
#if defined(MULTIPROCESSOR) |
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#define SET_CURLWP(lwp,cpu) \ |
#define SET_CURLWP(lwp,cpu) \ |
movl CPUVAR(SELF),cpu ; \ |
movl CPUVAR(SELF),cpu ; \ |
movl lwp,CPUVAR(CURLWP) ; \ |
movl lwp,CPUVAR(CURLWP) ; \ |
movl cpu,L_CPU(lwp) |
movl cpu,L_CPU(lwp) |
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#else |
#else |
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#define SET_CURLWP(lwp,tcpu) movl lwp,CPUVAR(CURLWP) |
#define SET_CURLWP(lwp,tcpu) movl lwp,CPUVAR(CURLWP) |
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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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#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
#include <machine/i82489reg.h> |
#include <machine/i82489reg.h> |
#endif |
#endif |
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/* |
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* PTmap is recursive pagemap at top of virtual address space. |
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* Within PTmap, the page directory can be found (third indirection). |
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* |
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* XXX 4 == sizeof pde |
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*/ |
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.set _C_LABEL(PTmap),(PDSLOT_PTE << PDSHIFT) |
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.set _C_LABEL(PTD),(_C_LABEL(PTmap) + PDSLOT_PTE * PAGE_SIZE) |
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.set _C_LABEL(PTDpde),(_C_LABEL(PTD) + PDSLOT_PTE * 4) |
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/* |
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* APTmap, APTD is the alternate recursive pagemap. |
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* It's used when modifying another process's page tables. |
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* |
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* XXX 4 == sizeof pde |
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*/ |
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.set _C_LABEL(APTmap),(PDSLOT_APTE << PDSHIFT) |
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.set _C_LABEL(APTD),(_C_LABEL(APTmap) + PDSLOT_APTE * PAGE_SIZE) |
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.set _C_LABEL(APTDpde),(_C_LABEL(PTD) + PDSLOT_APTE * 4) |
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/* This shouldn't conflict with a macro of the same name defined in pmap.h */ |
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#define PTE_BASE (PDSLOT_PTE << PDSHIFT) |
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/* |
/* |
* Initialization |
* Initialization |
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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 |
.globl _C_LABEL(bootdev) |
.globl _C_LABEL(bootdev) |
#endif |
#endif |
.globl _C_LABEL(proc0paddr),_C_LABEL(PTDpaddr) |
.globl _C_LABEL(proc0paddr),_C_LABEL(PDPpaddr) |
.globl _C_LABEL(biosbasemem),_C_LABEL(biosextmem) |
.globl _C_LABEL(biosbasemem),_C_LABEL(biosextmem) |
.globl _C_LABEL(gdt) |
.globl _C_LABEL(gdt) |
#ifdef I586_CPU |
#ifdef I586_CPU |
.globl _C_LABEL(idt) |
.globl _C_LABEL(idt) |
#endif |
#endif |
.globl _C_LABEL(lapic_tpr) |
.globl _C_LABEL(lapic_tpr) |
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#if NLAPIC > 0 |
#if NLAPIC > 0 |
#ifdef __ELF__ |
#ifdef __ELF__ |
.align PAGE_SIZE |
.align PAGE_SIZE |
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.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
_C_LABEL(local_apic): |
_C_LABEL(local_apic): |
.space LAPIC_ID |
.space LAPIC_ID |
_C_LABEL(lapic_id): |
_C_LABEL(lapic_id): |
.long 0x00000000 |
.long 0x00000000 |
.space LAPIC_TPRI-(LAPIC_ID+4) |
.space LAPIC_TPRI-(LAPIC_ID+4) |
_C_LABEL(lapic_tpr): |
_C_LABEL(lapic_tpr): |
.space LAPIC_PPRI-LAPIC_TPRI |
.space LAPIC_PPRI-LAPIC_TPRI |
_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 PAGE_SIZE-LAPIC_ISR |
.space PAGE_SIZE-LAPIC_ISR |
#else |
#else |
_C_LABEL(lapic_tpr): |
_C_LABEL(lapic_tpr): |
.long 0 |
.long 0 |
#endif |
#endif |
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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 |
_C_LABEL(PTDpaddr): .long 0 # paddr of PTD, for libkvm |
_C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm |
#ifndef REALBASEMEM |
#ifndef REALBASEMEM |
_C_LABEL(biosbasemem): .long 0 # base memory reported by BIOS |
_C_LABEL(biosbasemem): .long 0 # base memory reported by BIOS |
#else |
#else |
Line 239 _C_LABEL(biosextmem): .long 0 # extended |
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Line 215 _C_LABEL(biosextmem): .long 0 # extended |
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#else |
#else |
_C_LABEL(biosextmem): .long REALEXTMEM |
_C_LABEL(biosextmem): .long REALEXTMEM |
#endif |
#endif |
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.space 512 |
.space 512 |
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 274 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 503 try586: /* Use the `cpuid' instruction. |
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Line 479 try586: /* Use the `cpuid' instruction. |
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/* |
/* |
* Virtual address space of kernel: |
* Virtual address space of kernel: |
* |
* |
* 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) * PAGE_SIZE) |
#define PROC0PDIR ((0) * PAGE_SIZE) |
Line 513 try586: /* Use the `cpuid' instruction. |
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Line 489 try586: /* Use the `cpuid' instruction. |
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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 506 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 571 try586: /* Use the `cpuid' instruction. |
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Line 554 try586: /* Use the `cpuid' instruction. |
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/* Calculate end of text segment, rounded to a page. */ |
/* Calculate end of text segment, rounded to a page. */ |
leal (RELOC(etext)+PGOFSET),%edx |
leal (RELOC(etext)+PGOFSET),%edx |
andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* Skip over the first 1MB. */ |
/* Skip over the first 1MB. */ |
movl $_RELOC(KERNTEXTOFF),%eax |
movl $_RELOC(KERNTEXTOFF),%eax |
movl %eax,%ecx |
movl %eax,%ecx |
Line 619 try586: /* Use the `cpuid' instruction. |
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Line 602 try586: /* Use the `cpuid' instruction. |
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leal (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
leal (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
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/* Save phys. addr of PTD, for libkvm. */ |
/* Save phys. addr of PDP, for libkvm. */ |
movl %esi,RELOC(PTDpaddr) |
movl %esi,RELOC(PDPpaddr) |
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/* Load base of page directory and enable mapping. */ |
/* Load base of page directory and enable mapping. */ |
movl %esi,%eax # phys address of ptd in proc 0 |
movl %esi,%eax # phys address of ptd in proc 0 |
Line 634 try586: /* Use the `cpuid' instruction. |
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Line 617 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 |
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pushl %esp |
pushl %esp |
call _C_LABEL(initgdt) |
call _C_LABEL(initgdt) |
addl $4,%esp |
addl $4,%esp |
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movl _C_LABEL(nkpde),%eax |
movl _C_LABEL(nkpde),%eax |
shll $PGSHIFT,%eax |
shll $PGSHIFT,%eax |
addl $TABLESIZE,%eax |
addl $TABLESIZE,%eax |
Line 707 NENTRY(proc_trampoline) |
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Line 690 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 855 _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 878 ENTRY(i386_copyout) |
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Line 864 ENTRY(i386_copyout) |
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pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
pushl $0 |
pushl $0 |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 918 ENTRY(i386_copyout) |
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Line 904 ENTRY(i386_copyout) |
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movl $2f,PCB_ONFAULT(%edx) |
movl $2f,PCB_ONFAULT(%edx) |
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1: /* Check PTE for each page. */ |
1: /* Check PTE for each page. */ |
testb $PG_RW,_C_LABEL(PTmap)(,%edi,4) |
testb $PG_RW,PTE_BASE(,%edi,4) |
jz 2f |
jz 2f |
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4: incl %edi |
4: incl %edi |
decl %ecx |
decl %ecx |
jns 1b |
jns 1b |
Line 928 ENTRY(i386_copyout) |
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Line 914 ENTRY(i386_copyout) |
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movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
jmp 3f |
jmp 3f |
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2: /* Simulate a trap. */ |
2: /* Simulate a trap. */ |
pushl %ecx |
pushl %ecx |
movl %edi,%eax |
movl %edi,%eax |
Line 968 ENTRY(i486_copyout) |
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Line 954 ENTRY(i486_copyout) |
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pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
pushl $0 |
pushl $0 |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 1011 ENTRY(i486_copyout) |
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Line 997 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 1022 ENTRY(i386_copyin) |
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Line 1009 ENTRY(i386_copyin) |
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GET_CURPCB(%eax) |
GET_CURPCB(%eax) |
pushl $0 |
pushl $0 |
movl $_C_LABEL(copy_fault),PCB_ONFAULT(%eax) |
movl $_C_LABEL(copy_fault),PCB_ONFAULT(%eax) |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 1061 ENTRY(i386_copyin) |
|
Line 1048 ENTRY(i386_copyin) |
|
NENTRY(copy_efault) |
NENTRY(copy_efault) |
movl $EFAULT,%eax |
movl $EFAULT,%eax |
|
|
|
/* |
|
* kcopy_fault is used by kcopy and copy_fault is used by copyin/out. |
|
* |
|
* they're distinguished for lazy pmap switching. see trap(). |
|
*/ |
|
/* LINTSTUB: Ignore */ |
|
NENTRY(kcopy_fault) |
|
GET_CURPCB(%edx) |
|
popl PCB_ONFAULT(%edx) |
|
popl %edi |
|
popl %esi |
|
ret |
|
|
/* LINTSTUB: Ignore */ |
/* LINTSTUB: Ignore */ |
NENTRY(copy_fault) |
NENTRY(copy_fault) |
GET_CURPCB(%edx) |
GET_CURPCB(%edx) |
Line 1082 ENTRY(copyoutstr) |
|
Line 1082 ENTRY(copyoutstr) |
|
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
|
|
|
DO_DEFERRED_SWITCH(%eax) |
|
|
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 1112 ENTRY(copyoutstr) |
|
Line 1114 ENTRY(copyoutstr) |
|
movl %edi,%eax |
movl %edi,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
|
|
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 2f |
jnz 2f |
|
|
6: /* Simulate a trap. */ |
6: /* Simulate a trap. */ |
Line 1160 ENTRY(copyoutstr) |
|
Line 1162 ENTRY(copyoutstr) |
|
*/ |
*/ |
movl $VM_MAXUSER_ADDRESS,%eax |
movl $VM_MAXUSER_ADDRESS,%eax |
subl %edi,%eax |
subl %edi,%eax |
|
jc _C_LABEL(copystr_efault) |
cmpl %edx,%eax |
cmpl %edx,%eax |
jae 1f |
jae 1f |
movl %eax,%edx |
movl %eax,%edx |
Line 1199 ENTRY(copyoutstr) |
|
Line 1202 ENTRY(copyoutstr) |
|
ENTRY(copyinstr) |
ENTRY(copyinstr) |
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
|
|
|
DO_DEFERRED_SWITCH(%eax) |
|
|
GET_CURPCB(%ecx) |
GET_CURPCB(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
|
|
Line 1211 ENTRY(copyinstr) |
|
Line 1217 ENTRY(copyinstr) |
|
*/ |
*/ |
movl $VM_MAXUSER_ADDRESS,%eax |
movl $VM_MAXUSER_ADDRESS,%eax |
subl %esi,%eax |
subl %esi,%eax |
|
jc _C_LABEL(copystr_efault) |
cmpl %edx,%eax |
cmpl %edx,%eax |
jae 1f |
jae 1f |
movl %eax,%edx |
movl %eax,%edx |
|
|
*/ |
*/ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
ENTRY(fuword) |
ENTRY(fuword) |
|
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) |
|
|
movl (%edx),%eax |
movl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
|
|
/* |
/* |
* int fusword(const void *uaddr); |
* int fusword(const void *uaddr); |
* Fetch a short from the user's address space. |
* Fetch a short from the user's address space. |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
ENTRY(fusword) |
ENTRY(fusword) |
|
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) |
|
|
movzwl (%edx),%eax |
movzwl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
|
|
/* |
/* |
* int fuswintr(const void *uaddr); |
* int fuswintr(const void *uaddr); |
* Fetch a short from the user's address space. Can be called during an |
* Fetch a short from the user's address space. Can be called during an |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
ENTRY(fuswintr) |
ENTRY(fuswintr) |
|
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) |
Line 1352 ENTRY(fuswintr) |
|
Line 1363 ENTRY(fuswintr) |
|
movzwl (%edx),%eax |
movzwl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
|
|
/* |
/* |
* int fubyte(const void *uaddr); |
* int fubyte(const void *uaddr); |
* Fetch a byte from the user's address space. |
* Fetch a byte from the user's address space. |
Line 1360 ENTRY(fuswintr) |
|
Line 1371 ENTRY(fuswintr) |
|
*/ |
*/ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
ENTRY(fubyte) |
ENTRY(fubyte) |
|
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) |
|
Line 1416 NENTRY(fusuaddrfault) |
|
*/ |
*/ |
/* 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) |
|
|
|
|
movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
|
|
3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
|
|
xorl %eax,%eax |
xorl %eax,%eax |
movl %eax,PCB_ONFAULT(%ecx) |
movl %eax,PCB_ONFAULT(%ecx) |
ret |
ret |
|
|
/* |
/* |
* int susword(void *uaddr, short x); |
* int susword(void *uaddr, short x); |
* Store a short in the user's address space. |
* Store a short in the user's address space. |
|
|
*/ |
*/ |
/* 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) |
|
|
|
|
movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
|
|
3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
|
|
*/ |
*/ |
/* 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) |
Line 1514 ENTRY(suswintr) |
|
Line 1530 ENTRY(suswintr) |
|
|
|
movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
|
|
/* Simulate a trap. */ |
/* Simulate a trap. */ |
Line 1536 ENTRY(suswintr) |
|
Line 1552 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) |
|
|
jne 2f |
jne 2f |
#endif /* I486_CPU || I586_CPU || I686_CPU */ |
#endif /* I486_CPU || I586_CPU || I686_CPU */ |
|
|
GET_CURPCB(%eax) |
GET_CURPCB(%eax) |
movl $3f,PCB_ONFAULT(%eax) |
movl $3f,PCB_ONFAULT(%eax) |
|
|
movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
|
|
3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
Line 1663 NENTRY(switch_error) |
|
Line 1680 NENTRY(switch_error) |
|
* 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 lwp. |
* it for a new lwp. |
*/ |
*/ |
ENTRY(cpu_switch) |
ENTRY(cpu_switch) |
Line 1680 ENTRY(cpu_switch) |
|
Line 1697 ENTRY(cpu_switch) |
|
call _C_LABEL(panic) |
call _C_LABEL(panic) |
/* NOTREACHED */ |
/* NOTREACHED */ |
2: .asciz "not splsched() in cpu_switch!" |
2: .asciz "not splsched() in cpu_switch!" |
1: |
1: |
#endif /* DEBUG */ |
#endif /* DEBUG */ |
|
|
movl 16(%esp),%esi # current |
movl 16(%esp),%esi # current |
|
|
/* |
/* |
Line 1721 ENTRY(cpu_switch) |
|
Line 1738 ENTRY(cpu_switch) |
|
*/ |
*/ |
|
|
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 L_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
Line 1748 ENTRY(cpu_switch) |
|
Line 1765 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 |
Line 1773 ENTRY(cpu_switch) |
|
Line 1787 ENTRY(cpu_switch) |
|
|
|
xorl %esi,%esi |
xorl %esi,%esi |
sti |
sti |
idle_unlock: |
idle_unlock: |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_unlock_idle) |
call _C_LABEL(sched_unlock_idle) |
#endif |
#endif |
/* Interrupts are okay again. */ |
/* Interrupts are okay again. */ |
|
|
call _C_LABEL(Xspllower) # process pending interrupts |
call _C_LABEL(Xspllower) # process pending interrupts |
addl $4,%esp |
addl $4,%esp |
jmp idle_start |
jmp idle_start |
idle_zero: |
idle_zero: |
sti |
sti |
call _C_LABEL(uvm_pageidlezero) |
call _C_LABEL(uvm_pageidlezero) |
cli |
cli |
|
|
sti |
sti |
hlt |
hlt |
NENTRY(mpidle) |
NENTRY(mpidle) |
idle_start: |
idle_start: |
cli |
cli |
cmpl $0,_C_LABEL(sched_whichqs) |
cmpl $0,_C_LABEL(sched_whichqs) |
jz idle_loop |
jz idle_loop |
idle_exit: |
idle_exit: |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
sti |
|
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_lock_idle) |
call _C_LABEL(sched_lock_idle) |
#endif |
#endif |
movl _C_LABEL(sched_whichqs),%ecx |
movl _C_LABEL(sched_whichqs),%ecx |
bsfl %ecx,%ebx |
bsfl %ecx,%ebx |
jz idle_unlock |
jz idle_unlock |
|
|
switch_dequeue: |
switch_dequeue: |
/* |
/* |
* we're running at splhigh(), but it's otherwise okay to take |
* we're running at splhigh(), but it's otherwise okay to take |
* interrupts here. |
* interrupts here. |
*/ |
*/ |
sti |
sti |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
|
|
SET_CURLWP(%edi,%ecx) |
SET_CURLWP(%edi,%ecx) |
|
|
/* Skip context switch if same lwp. */ |
/* Skip context switch if same lwp. */ |
movl $1, %eax |
xorl %ebx,%ebx |
cmpl %edi,%esi |
cmpl %edi,%esi |
je switch_return |
je switch_return |
|
|
|
|
*/ |
*/ |
|
|
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 L_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
|
|
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 L_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 1942 switch_restored: |
|
/* Restore cr0 (including FPU state). */ |
/* Restore cr0 (including FPU state). */ |
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 |
cmpl CPUVAR(SELF),%ebx |
cmpl CPUVAR(SELF),%ebx |
jz 1f |
jz 1f |
orl $CR0_TS,%ecx |
orl $CR0_TS,%ecx |
1: |
1: |
#endif |
#endif |
movl %ecx,%cr0 |
movl %ecx,%cr0 |
|
|
/* Record new pcb. */ |
/* Record new pcb. */ |
Line 1948 switch_restored: |
|
Line 1965 switch_restored: |
|
*/ |
*/ |
movl CPUVAR(CURLWP),%edi |
movl CPUVAR(CURLWP),%edi |
movl L_PROC(%edi),%esi |
movl L_PROC(%edi),%esi |
cmpl $0,P_NRAS(%esi) |
cmpl $0,P_RASLIST(%esi) |
je 1f |
jne 2f |
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 1f |
|
movl %eax,TF_EIP(%ebx) |
|
1: |
1: |
xor %eax,%eax |
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 |
|
|
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) |
* void cpu_switchto(struct lwp *current, struct lwp *next) |
* Switch to the specified next LWP. |
* Switch to the specified next LWP. |
Line 2020 ENTRY(cpu_switchto) |
|
Line 2045 ENTRY(cpu_switchto) |
|
jmp switch_resume |
jmp switch_resume |
|
|
/* |
/* |
* void switch_exit(struct lwp *l, void (*exit)(struct lwp *)); |
* void cpu_exit(struct lwp *l) |
* Switch to the appropriate idle context (lwp0's if uniprocessor; the cpu's |
* Switch to the appropriate idle context (lwp0'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(lwp0) |
.globl _C_LABEL(lwp0) |
#endif |
#endif |
.globl _C_LABEL(uvmspace_free),_C_LABEL(kernel_map) |
/* LINTSTUB: Func: void cpu_exit(struct lwp *l) */ |
.globl _C_LABEL(uvm_km_free),_C_LABEL(tss_free) |
ENTRY(cpu_exit) |
/* LINTSTUB: Func: void switch_exit(struct lwp *l, void (*exit)(struct lwp *)) */ |
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ENTRY(switch_exit) |
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movl 4(%esp),%edi # old process |
movl 4(%esp),%edi # old process |
movl 8(%esp),%eax # exit func |
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#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
movl $_C_LABEL(lwp0),%ebx |
movl $_C_LABEL(lwp0),%ebx |
movl L_ADDR(%ebx),%esi |
movl L_ADDR(%ebx),%esi |
Line 2052 ENTRY(switch_exit) |
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Line 2074 ENTRY(switch_exit) |
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movl PCB_ESP(%esi),%esp |
movl PCB_ESP(%esi),%esp |
movl PCB_EBP(%esi),%ebp |
movl PCB_EBP(%esi),%ebp |
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/* Save exit func. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
pushl %eax |
movl %cr3,%eax |
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movl %eax,PCB_CR3(%esi) |
/* Load TSS info. */ |
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#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 |
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/* Switch address space. */ |
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movl PCB_CR3(%esi),%ecx |
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movl %ecx,%cr3 |
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/* Switch TSS. */ |
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andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
ltr %dx |
ltr %dx |
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Line 2084 ENTRY(switch_exit) |
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Line 2100 ENTRY(switch_exit) |
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sti |
sti |
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/* |
/* |
* Schedule the dead process's vmspace and stack to be freed. |
* Schedule the dead LWP's stack to be freed. |
*/ |
*/ |
movl 0(%esp),%eax /* %eax = exit func */ |
pushl %edi |
movl %edi,0(%esp) /* {lwp_}exit2(l) */ |
call _C_LABEL(lwp_exit2) |
call *%eax |
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addl $4,%esp |
addl $4,%esp |
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/* Jump into cpu_switch() with the right state. */ |
/* Jump into cpu_switch() with the right state. */ |
Line 2103 ENTRY(switch_exit) |
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Line 2118 ENTRY(switch_exit) |
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/* LINTSTUB: Func: void savectx(struct pcb *pcb) */ |
/* LINTSTUB: Func: void savectx(struct pcb *pcb) */ |
ENTRY(savectx) |
ENTRY(savectx) |
movl 4(%esp),%edx # edx = p->p_addr |
movl 4(%esp),%edx # edx = p->p_addr |
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/* Save stack pointers. */ |
/* Save stack pointers. */ |
movl %esp,PCB_ESP(%edx) |
movl %esp,PCB_ESP(%edx) |
movl %ebp,PCB_EBP(%edx) |
movl %ebp,PCB_EBP(%edx) |
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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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#ifdef DDB |
#ifdef DDB |
int $3 |
int $3 |
#endif |
#endif |
1: |
1: |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
movl CPUVAR(CURLWP),%edx |
movl CPUVAR(CURLWP),%edx |
movl %esp,L_MD_REGS(%edx) # save pointer to frame |
movl %esp,L_MD_REGS(%edx) # save pointer to frame |
movl L_PROC(%edx),%edx |
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(%eax) |
CHECK_ASTPENDING(%eax) |
je 1f |
je 1f |
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CLEAR_ASTPENDING(%eax) |
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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movl $IPL_NONE,CPUVAR(ILEVEL) |
movl $IPL_NONE,CPUVAR(ILEVEL) |
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 |
/* |
/* |