version 1.108, 2013/12/01 01:05:16 |
version 1.116, 2016/05/12 06:45:16 |
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* POSSIBILITY OF SUCH DAMAGE. |
* POSSIBILITY OF SUCH DAMAGE. |
*/ |
*/ |
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/*- |
/*- |
* Copyright (c) 1998, 2000, 2004, 2006, 2007, 2009 The NetBSD Foundation, Inc. |
* Copyright (c) 1998, 2000, 2004, 2006, 2007, 2009 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
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__KERNEL_RCSID(0, "$NetBSD$"); |
__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_compat_oldboot.h" |
#include "opt_compat_oldboot.h" |
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#include "opt_copy_symtab.h" |
#include "opt_ddb.h" |
#include "opt_ddb.h" |
#include "opt_modular.h" |
#include "opt_modular.h" |
#include "opt_multiboot.h" |
#include "opt_multiboot.h" |
Line 139 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 139 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_vm86.h" |
#include "opt_vm86.h" |
#include "opt_xen.h" |
#include "opt_xen.h" |
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#include "npx.h" |
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#include "assym.h" |
#include "assym.h" |
#include "lapic.h" |
#include "lapic.h" |
#include "ioapic.h" |
#include "ioapic.h" |
Line 159 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 158 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <machine/multiboot.h> |
#include <machine/multiboot.h> |
#endif |
#endif |
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/* XXX temporary kluge; these should not be here */ |
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/* Get definitions for IOM_BEGIN, IOM_END, and IOM_SIZE */ |
/* Get definitions for IOM_BEGIN, IOM_END, and IOM_SIZE */ |
#include <dev/isa/isareg.h> |
#include <dev/isa/isareg.h> |
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Line 170 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 168 __KERNEL_RCSID(0, "$NetBSD$"); |
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#endif /* XEN */ |
#endif /* XEN */ |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
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#ifndef PAE |
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#define PROC0_PDIR_OFF 0 |
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#else |
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#define PROC0_L3_OFF 0 |
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#define PROC0_PDIR_OFF 1 * PAGE_SIZE |
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#endif |
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#define PROC0_STK_OFF (PROC0_PDIR_OFF + PDP_SIZE * PAGE_SIZE) |
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#define PROC0_PTP1_OFF (PROC0_STK_OFF + UPAGES * PAGE_SIZE) |
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/* |
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* fillkpt - Fill in a kernel page table |
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* eax = pte (page frame | control | status) |
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* ebx = page table address |
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* ecx = number of pages to map |
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* |
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* For PAE, each entry is 8 bytes long: we must set the 4 upper bytes to 0. |
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* This is done by the first instruction of fillkpt. In the non-PAE case, this |
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* instruction just clears the page table entry. |
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*/ |
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#define fillkpt \ |
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1: movl $0,(PDE_SIZE-4)(%ebx) ; /* upper 32 bits: 0 */ \ |
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movl %eax,(%ebx) ; /* store phys addr */ \ |
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addl $PDE_SIZE,%ebx ; /* next PTE/PDE */ \ |
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addl $PAGE_SIZE,%eax ; /* next phys page */ \ |
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loop 1b ; |
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#ifdef XEN |
#ifdef XEN |
/* |
/* |
* Xen guest identifier and loader selection |
* Xen guest identifier and loader selection |
Line 185 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 212 __KERNEL_RCSID(0, "$NetBSD$"); |
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.ascii ",PAE=yes[extended-cr3]" |
.ascii ",PAE=yes[extended-cr3]" |
#endif |
#endif |
.ascii ",LOADER=generic" |
.ascii ",LOADER=generic" |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(makeoptions_COPY_SYMTAB) |
.ascii ",BSD_SYMTAB=yes" |
.ascii ",BSD_SYMTAB=yes" |
#endif |
#endif |
.byte 0 |
.byte 0 |
Line 242 LABEL(lapic_tpr) |
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Line 269 LABEL(lapic_tpr) |
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END(lapic_tpr) |
END(lapic_tpr) |
#endif |
#endif |
.type _C_LABEL(cputype), @object |
.type _C_LABEL(cputype), @object |
LABEL(cputype) .long 0 # are we 80486, Pentium, or.. |
LABEL(cputype) .long 0 /* are we 80486, Pentium, or.. */ |
END(cputype) |
END(cputype) |
.type _C_LABEL(cpuid_level), @object |
.type _C_LABEL(cpuid_level), @object |
LABEL(cpuid_level) .long 0 |
LABEL(cpuid_level) .long 0 |
END(cpuid_level) |
END(cpuid_level) |
.type _C_LABEL(atdevbase), @object |
.type _C_LABEL(atdevbase), @object |
LABEL(atdevbase) .long 0 # location of start of iomem in virtual |
LABEL(atdevbase) .long 0 /* location of start of iomem in virt */ |
END(atdevbase) |
END(atdevbase) |
.type _C_LABEL(lwp0uarea), @object |
.type _C_LABEL(lwp0uarea), @object |
LABEL(lwp0uarea) .long 0 |
LABEL(lwp0uarea) .long 0 |
END(lwp0uarea) |
END(lwp0uarea) |
.type _C_LABEL(PDPpaddr), @object |
.type _C_LABEL(PDPpaddr), @object |
LABEL(PDPpaddr) .long 0 # paddr of PDP, for libkvm |
LABEL(PDPpaddr) .long 0 /* paddr of PDP, for libkvm */ |
END(PDPpaddr) |
END(PDPpaddr) |
.type _C_LABEL(tablesize), @object |
.type _C_LABEL(tablesize), @object |
_C_LABEL(tablesize): .long 0 |
_C_LABEL(tablesize): .long 0 |
END(tablesize) |
END(tablesize) |
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/* Space for the temporary stack */ |
.size tmpstk, tmpstk - . |
.size tmpstk, tmpstk - . |
.space 512 |
.space 512 |
tmpstk: |
tmpstk: |
#ifdef XEN |
#ifdef XEN |
.align PAGE_SIZE, 0x0 # Align on page boundary |
.align PAGE_SIZE, 0x0 /* Align on page boundary */ |
LABEL(tmpgdt) |
LABEL(tmpgdt) |
.space PAGE_SIZE # Xen expects a page |
.space PAGE_SIZE /* Xen expects a page */ |
END(tmpgdt) |
END(tmpgdt) |
#endif /* XEN */ |
#endif /* XEN */ |
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ENTRY(start) |
ENTRY(start) |
#ifndef XEN |
#ifndef XEN |
movw $0x1234,0x472 # warm boot |
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/* Warm boot */ |
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movw $0x1234,0x472 |
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#if defined(MULTIBOOT) |
#if defined(MULTIBOOT) |
jmp 1f |
jmp 1f |
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Line 299 _C_LABEL(Multiboot_Header): |
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Line 331 _C_LABEL(Multiboot_Header): |
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* space to process it later -- after we are relocated. It will |
* space to process it later -- after we are relocated. It will |
* be safer to run complex C code than doing it at this point. |
* be safer to run complex C code than doing it at this point. |
*/ |
*/ |
pushl %ebx # Address of Multiboot information |
pushl %ebx /* Address of Multiboot information */ |
call _C_LABEL(multiboot_pre_reloc) |
call _C_LABEL(multiboot_pre_reloc) |
addl $4,%esp |
addl $4,%esp |
jmp 2f |
jmp 2f |
Line 312 _C_LABEL(Multiboot_Header): |
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Line 344 _C_LABEL(Multiboot_Header): |
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* (boothowto, [bootdev], bootinfo, esym, biosextmem, biosbasemem), |
* (boothowto, [bootdev], bootinfo, esym, biosextmem, biosbasemem), |
* 4 bytes each. |
* 4 bytes each. |
*/ |
*/ |
addl $4,%esp # Discard return address to boot loader |
addl $4,%esp /* Discard return address to boot loader */ |
call _C_LABEL(native_loader) |
call _C_LABEL(native_loader) |
addl $24,%esp |
addl $24,%esp |
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Line 404 is486: movl $CPU_486,RELOC(cputype) |
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Line 436 is486: movl $CPU_486,RELOC(cputype) |
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popfl |
popfl |
jmp 2f |
jmp 2f |
trycyrix486: |
trycyrix486: |
movl $CPU_6x86,RELOC(cputype) # set CPU type |
movl $CPU_6x86,RELOC(cputype) /* set CPU type */ |
/* |
/* |
* Check for Cyrix 486 CPU by seeing if the flags change during a |
* Check for Cyrix 486 CPU by seeing if the flags change during a |
* divide. This is documented in the Cx486SLC/e SMM Programmer's |
* divide. This is documented in the Cx486SLC/e SMM Programmer's |
* Guide. |
* Guide. |
*/ |
*/ |
xorl %edx,%edx |
xorl %edx,%edx |
cmpl %edx,%edx # set flags to known state |
cmpl %edx,%edx /* set flags to known state */ |
pushfl |
pushfl |
popl %ecx # store flags in ecx |
popl %ecx /* store flags in ecx */ |
movl $-1,%eax |
movl $-1,%eax |
movl $4,%ebx |
movl $4,%ebx |
divl %ebx # do a long division |
divl %ebx /* do a long division */ |
pushfl |
pushfl |
popl %eax |
popl %eax |
xorl %ecx,%eax # are the flags different? |
xorl %ecx,%eax /* are the flags different? */ |
testl $0x8d5,%eax # only check C|PF|AF|Z|N|V |
testl $0x8d5,%eax /* only check C|PF|AF|Z|N|V */ |
jne 2f # yes; must be Cyrix 6x86 CPU |
jne 2f /* yes; must be Cyrix 6x86 CPU */ |
movl $CPU_486DLC,RELOC(cputype) # set CPU type |
movl $CPU_486DLC,RELOC(cputype) /* set CPU type */ |
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#ifndef CYRIX_CACHE_WORKS |
#ifndef CYRIX_CACHE_WORKS |
/* Disable caching of the ISA hole only. */ |
/* Disable caching of the ISA hole only. */ |
invd |
invd |
movb $CCR0,%al # Configuration Register index (CCR0) |
movb $CCR0,%al /* Configuration Register index (CCR0) */ |
outb %al,$0x22 |
outb %al,$0x22 |
inb $0x23,%al |
inb $0x23,%al |
orb $(CCR0_NC1|CCR0_BARB),%al |
orb $(CCR0_NC1|CCR0_BARB),%al |
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invd |
invd |
#else /* CYRIX_CACHE_WORKS */ |
#else /* CYRIX_CACHE_WORKS */ |
/* Set cache parameters */ |
/* Set cache parameters */ |
invd # Start with guaranteed clean cache |
invd /* Start with guaranteed clean cache */ |
movb $CCR0,%al # Configuration Register index (CCR0) |
movb $CCR0,%al /* Configuration Register index (CCR0) */ |
outb %al,$0x22 |
outb %al,$0x22 |
inb $0x23,%al |
inb $0x23,%al |
andb $~CCR0_NC0,%al |
andb $~CCR0_NC0,%al |
Line 498 try586: /* Use the `cpuid' instruction. |
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Line 530 try586: /* Use the `cpuid' instruction. |
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* The boot program should check: |
* The boot program should check: |
* text+data <= &stack_variable - more_space_for_stack |
* text+data <= &stack_variable - more_space_for_stack |
* text+data+bss+pad+space_for_page_tables <= end_of_memory |
* text+data+bss+pad+space_for_page_tables <= end_of_memory |
* Oops, the gdt is in the carcass of the boot program so clearing |
* |
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* XXX: the gdt is in the carcass of the boot program so clearing |
* the rest of memory is still not possible. |
* the rest of memory is still not possible. |
*/ |
*/ |
movl $_RELOC(tmpstk),%esp # bootstrap stack end location |
movl $_RELOC(tmpstk),%esp |
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/* |
/* |
* Virtual address space of kernel, without PAE. The page dir is 1 page long. |
* Virtual address space of kernel, without PAE. The page dir is 1 page long. |
Line 514 try586: /* Use the `cpuid' instruction. |
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Line 547 try586: /* Use the `cpuid' instruction. |
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* text | data | bss | [syms] | [blobs] | L3 | page dir | proc0 kstack | L1 ptp |
* text | data | bss | [syms] | [blobs] | L3 | page dir | proc0 kstack | L1 ptp |
* 0 1 5 6 7 |
* 0 1 5 6 7 |
*/ |
*/ |
#ifndef PAE |
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#define PROC0_PDIR_OFF 0 |
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#else |
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#define PROC0_L3_OFF 0 |
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#define PROC0_PDIR_OFF 1 * PAGE_SIZE |
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#endif |
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#define PROC0_STK_OFF (PROC0_PDIR_OFF + PDP_SIZE * PAGE_SIZE) |
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#define PROC0_PTP1_OFF (PROC0_STK_OFF + UPAGES * PAGE_SIZE) |
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/* |
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* fillkpt - Fill in a kernel page table |
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* eax = pte (page frame | control | status) |
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* ebx = page table address |
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* ecx = number of pages to map |
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* |
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* For PAE, each entry is 8 bytes long: we must set the 4 upper bytes to 0. |
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* This is done by the first instruction of fillkpt. In the non-PAE case, this |
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* instruction just clears the page table entry. |
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*/ |
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#define fillkpt \ |
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1: movl $0,(PDE_SIZE-4)(%ebx) ; /* clear bits */ \ |
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movl %eax,(%ebx) ; /* store phys addr */ \ |
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addl $PDE_SIZE,%ebx ; /* next pte/pde */ \ |
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addl $PAGE_SIZE,%eax ; /* next phys page */ \ |
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loop 1b ; |
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/* Find end of kernel image. */ |
/* Find end of kernel image. */ |
movl $RELOC(end),%edi |
movl $RELOC(end),%edi |
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#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(makeoptions_COPY_SYMTAB) |
/* Save the symbols (if loaded). */ |
/* Save the symbols (if loaded). */ |
movl RELOC(esym),%eax |
movl RELOC(esym),%eax |
testl %eax,%eax |
testl %eax,%eax |
Line 564 try586: /* Use the `cpuid' instruction. |
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Line 570 try586: /* Use the `cpuid' instruction. |
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1: |
1: |
/* Compute sizes */ |
/* Compute sizes */ |
movl %edi,%esi |
movl %edi,%esi |
addl $PGOFSET,%esi # page align up |
addl $PGOFSET,%esi |
andl $~PGOFSET,%esi |
andl $~PGOFSET,%esi |
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/* nkptp[1] = (esi + ~L2_FRAME) >> L2_SHIFT + 1; */ |
/* nkptp[1] = (esi + ~L2_FRAME) >> L2_SHIFT + 1; */ |
Line 607 try586: /* Use the `cpuid' instruction. |
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Line 613 try586: /* Use the `cpuid' instruction. |
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* Build initial page tables. |
* Build initial page tables. |
*/ |
*/ |
/* |
/* |
* Compute &__data_start - KERNBASE. This can't be > 4G, |
* Compute &__rodata_start - KERNBASE. This can't be > 4G, |
* or we can't deal with it anyway, since we can't load it in |
* or we can't deal with it anyway, since we can't load it in |
* 32 bit mode. So use the bottom 32 bits. |
* 32 bit mode. So use the bottom 32 bits. |
*/ |
*/ |
movl $RELOC(__data_start),%edx |
movl $RELOC(__rodata_start),%edx |
andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* |
/* |
Line 635 try586: /* Use the `cpuid' instruction. |
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Line 641 try586: /* Use the `cpuid' instruction. |
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/* Map the data, BSS, and bootstrap tables read-write. */ |
/* Map the data, BSS, and bootstrap tables read-write. */ |
leal (PG_V|PG_KW)(%edx),%eax |
leal (PG_V|PG_KW)(%edx),%eax |
movl RELOC(tablesize),%ecx |
movl RELOC(tablesize),%ecx |
addl %esi,%ecx # end of tables |
addl %esi,%ecx /* end of tables */ |
subl %edx,%ecx # subtract end of text |
subl %edx,%ecx /* subtract end of text */ |
shrl $PGSHIFT,%ecx |
shrl $PGSHIFT,%ecx |
fillkpt |
fillkpt |
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/* Map ISA I/O mem (later atdevbase) */ |
/* Map ISA I/O mem (later atdevbase) */ |
movl $(IOM_BEGIN|PG_V|PG_KW/*|PG_N*/),%eax # having these bits set |
movl $(IOM_BEGIN|PG_V|PG_KW/*|PG_N*/),%eax |
movl $(IOM_SIZE>>PGSHIFT),%ecx # for this many pte s, |
movl $(IOM_SIZE>>PGSHIFT),%ecx |
fillkpt |
fillkpt |
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/* |
/* |
Line 691 try586: /* Use the `cpuid' instruction. |
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Line 697 try586: /* Use the `cpuid' instruction. |
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* Startup checklist: |
* Startup checklist: |
* 1. Load %cr3 with pointer to PDIR (or L3 PD page for PAE). |
* 1. Load %cr3 with pointer to PDIR (or L3 PD page for PAE). |
*/ |
*/ |
movl %esi,%eax # phys address of ptd in proc 0 |
movl %esi,%eax /* phys address of PTD in proc0 */ |
movl %eax,%cr3 # load ptd addr into mmu |
movl %eax,%cr3 /* load PTD addr into MMU */ |
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/* |
/* |
* 2. Enable paging and the rest of it. |
* 2. Enable paging and the rest of it. |
*/ |
*/ |
movl %cr0,%eax # get control word |
movl %cr0,%eax |
# enable paging & NPX emulation |
orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_MP|CR0_WP|CR0_AM),%eax |
orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_EM|CR0_MP|CR0_WP|CR0_AM),%eax |
movl %eax,%cr0 |
movl %eax,%cr0 # and page NOW! |
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pushl $begin # jump to high mem |
pushl $begin /* jump to high mem */ |
ret |
ret |
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begin: |
begin: |
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* memory, remove it. |
* memory, remove it. |
*/ |
*/ |
movl _C_LABEL(nkptp)+1*4,%ecx |
movl _C_LABEL(nkptp)+1*4,%ecx |
leal (PROC0_PDIR_OFF)(%esi),%ebx # old, phys address of PDIR |
leal (PROC0_PDIR_OFF)(%esi),%ebx /* old, phys address of PDIR */ |
addl $(KERNBASE), %ebx # new, virtual address of PDIR |
addl $(KERNBASE), %ebx /* new, virt address of PDIR */ |
1: movl $0,(PDE_SIZE-4)(%ebx) # Upper bits (for PAE) |
1: movl $0,(PDE_SIZE-4)(%ebx) /* upper bits (for PAE) */ |
movl $0,(%ebx) |
movl $0,(%ebx) |
addl $PDE_SIZE,%ebx |
addl $PDE_SIZE,%ebx |
loop 1b |
loop 1b |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
leal (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
movl %eax,_C_LABEL(lwp0uarea) |
movl %eax,_C_LABEL(lwp0uarea) |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
leal (USPACE-FRAMESIZE)(%eax),%esp |
movl %esi,(KSTACK_SIZE+PCB_CR3)(%eax) # pcb->pcb_cr3 |
movl %esi,PCB_CR3(%eax) /* pcb->pcb_cr3 */ |
xorl %ebp,%ebp # mark end of frames |
xorl %ebp,%ebp /* mark end of frames */ |
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#if defined(MULTIBOOT) |
#if defined(MULTIBOOT) |
/* It is now safe to parse the Multiboot information structure |
/* It is now safe to parse the Multiboot information structure |
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call _C_LABEL(multiboot_post_reloc) |
call _C_LABEL(multiboot_post_reloc) |
#endif |
#endif |
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subl $NGDT*8, %esp # space for temporary gdt |
subl $NGDT*8, %esp /* space for temporary gdt */ |
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(tablesize),%eax |
movl _C_LABEL(tablesize),%eax |
addl %esi,%eax # skip past stack and page tables |
addl %esi,%eax /* skip past stack and page tables */ |
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#ifdef PAE |
#ifdef PAE |
pushl $0 # init386() expects a 64 bits paddr_t with PAE |
pushl $0 /* init386() expects a 64 bits paddr_t with PAE */ |
#endif |
#endif |
pushl %eax |
pushl %eax |
call _C_LABEL(init386) # wire 386 chip for unix operation |
call _C_LABEL(init386) /* wire 386 chip for unix operation */ |
addl $PDE_SIZE,%esp # pop paddr_t |
addl $PDE_SIZE,%esp /* pop paddr_t */ |
addl $NGDT*8,%esp # pop temporary gdt |
addl $NGDT*8,%esp /* pop temporary gdt */ |
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#ifdef SAFARI_FIFO_HACK |
#ifdef SAFARI_FIFO_HACK |
movb $5,%al |
movb $5,%al |
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popfl |
popfl |
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cld |
cld |
movl %esp, %ebx # save start of available space |
movl %esp, %ebx /* save start of available space */ |
movl $_RELOC(tmpstk),%esp # bootstrap stack end location |
movl $_RELOC(tmpstk),%esp /* bootstrap stack end location */ |
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/* Clear BSS. */ |
/* Clear BSS. */ |
xorl %eax,%eax |
xorl %eax,%eax |
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* done using it. |
* done using it. |
*/ |
*/ |
movl $RELOC(tmpgdt), %eax |
movl $RELOC(tmpgdt), %eax |
pushl %eax # start of temporary gdt |
pushl %eax /* start of temporary gdt */ |
call _C_LABEL(initgdt) |
call _C_LABEL(initgdt) |
addl $4,%esp |
addl $4,%esp |
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movl %esi, _C_LABEL(lwp0uarea) |
movl %esi, _C_LABEL(lwp0uarea) |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
leal (USPACE-FRAMESIZE)(%eax),%esp |
xorl %ebp,%ebp # mark end of frames |
xorl %ebp,%ebp /* mark end of frames */ |
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addl $USPACE, %esi |
addl $USPACE, %esi |
subl $KERNBASE, %esi #init386 want a physical address |
subl $KERNBASE, %esi /* init386 wants a physical address */ |
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#ifdef PAE |
#ifdef PAE |
pushl $0 # init386() expects a 64 bits paddr_t with PAE |
pushl $0 /* init386() expects a 64 bits paddr_t with PAE */ |
#endif |
#endif |
pushl %esi |
pushl %esi |
call _C_LABEL(init386) # wire 386 chip for unix operation |
call _C_LABEL(init386) /* wire 386 chip for unix operation */ |
addl $PDE_SIZE,%esp # pop paddr_t |
addl $PDE_SIZE,%esp /* pop paddr_t */ |
call _C_LABEL(main) |
call _C_LABEL(main) |
#endif /* XEN */ |
#endif /* XEN */ |
END(start) |
END(start) |
Line 881 END(lgdt_finish) |
|
Line 886 END(lgdt_finish) |
|
* |
* |
* This is a trampoline function pushed onto the stack of a newly created |
* This is a trampoline function pushed onto the stack of a newly created |
* process in order to do some additional setup. The trampoline is entered by |
* process in order to do some additional setup. The trampoline is entered by |
* cpu_switch()ing to the process, so we abuse the callee-saved registers used |
* cpu_switchto()ing to the process, so we abuse the callee-saved |
* by cpu_switch() to store the information about the stub to call. |
* registers used by cpu_switchto() to store the information about the |
|
* stub to call. |
* NOTE: This function does not have a normal calling sequence! |
* NOTE: This function does not have a normal calling sequence! |
*/ |
*/ |
NENTRY(lwp_trampoline) |
NENTRY(lwp_trampoline) |
|
|
* Handler has returned here as if we called it. The sigcontext |
* Handler has returned here as if we called it. The sigcontext |
* is on the stack after the 3 args "we" pushed. |
* is on the stack after the 3 args "we" pushed. |
*/ |
*/ |
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_compat_16___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): |
END(sigcode) |
END(sigcode) |
|
|
*/ |
*/ |
ENTRY(setjmp) |
ENTRY(setjmp) |
movl 4(%esp),%eax |
movl 4(%esp),%eax |
movl %ebx,(%eax) # save ebx |
movl %ebx,(%eax) /* save ebx */ |
movl %esp,4(%eax) # save esp |
movl %esp,4(%eax) /* save esp */ |
movl %ebp,8(%eax) # save ebp |
movl %ebp,8(%eax) /* save ebp */ |
movl %esi,12(%eax) # save esi |
movl %esi,12(%eax) /* save esi */ |
movl %edi,16(%eax) # save edi |
movl %edi,16(%eax) /* save edi */ |
movl (%esp),%edx # get rta |
movl (%esp),%edx /* get rta */ |
movl %edx,20(%eax) # save eip |
movl %edx,20(%eax) /* save eip */ |
xorl %eax,%eax # return 0 |
xorl %eax,%eax /* return 0 */ |
ret |
ret |
END(setjmp) |
END(setjmp) |
|
|
|
|
*/ |
*/ |
ENTRY(longjmp) |
ENTRY(longjmp) |
movl 4(%esp),%eax |
movl 4(%esp),%eax |
movl (%eax),%ebx # restore ebx |
movl (%eax),%ebx /* restore ebx */ |
movl 4(%eax),%esp # restore esp |
movl 4(%eax),%esp /* restore esp */ |
movl 8(%eax),%ebp # restore ebp |
movl 8(%eax),%ebp /* restore ebp */ |
movl 12(%eax),%esi # restore esi |
movl 12(%eax),%esi /* restore esi */ |
movl 16(%eax),%edi # restore edi |
movl 16(%eax),%edi /* restore edi */ |
movl 20(%eax),%edx # get rta |
movl 20(%eax),%edx /* get rta */ |
movl %edx,(%esp) # put in return frame |
movl %edx,(%esp) /* put in return frame */ |
movl $1,%eax # return 1 |
movl $1,%eax /* return 1 */ |
ret |
ret |
END(longjmp) |
END(longjmp) |
|
|
|
|
* Mimic cpu_switchto() for postmortem debugging. |
* Mimic cpu_switchto() for postmortem debugging. |
*/ |
*/ |
ENTRY(dumpsys) |
ENTRY(dumpsys) |
pushl %ebx # set up fake switchframe |
pushl %ebx /* set up fake switchframe */ |
pushl %esi # and save context |
pushl %esi /* and save context */ |
pushl %edi |
pushl %edi |
movl %esp,_C_LABEL(dumppcb)+PCB_ESP |
movl %esp,_C_LABEL(dumppcb)+PCB_ESP |
movl %ebp,_C_LABEL(dumppcb)+PCB_EBP |
movl %ebp,_C_LABEL(dumppcb)+PCB_EBP |
call _C_LABEL(dodumpsys) # dump! |
call _C_LABEL(dodumpsys) /* dump! */ |
addl $(3*4), %esp # unwind switchframe |
addl $(3*4), %esp /* unwind switchframe */ |
ret |
ret |
END(dumpsys) |
END(dumpsys) |
|
|
Line 1000 ENTRY(cpu_switchto) |
|
Line 1006 ENTRY(cpu_switchto) |
|
0: |
0: |
#endif |
#endif |
|
|
movl 16(%esp),%esi # oldlwp |
movl 16(%esp),%esi /* oldlwp */ |
movl 20(%esp),%edi # newlwp |
movl 20(%esp),%edi /* newlwp */ |
movl 24(%esp),%edx # returning |
movl 24(%esp),%edx /* returning */ |
testl %esi,%esi |
testl %esi,%esi |
jz 1f |
jz 1f |
|
|
Line 1137 END(cpu_switchto) |
|
Line 1143 END(cpu_switchto) |
|
* Update pcb, saving current processor state. |
* Update pcb, saving current processor state. |
*/ |
*/ |
ENTRY(savectx) |
ENTRY(savectx) |
movl 4(%esp),%edx # edx = pcb |
movl 4(%esp),%edx /* edx = pcb */ |
movl %esp,PCB_ESP(%edx) |
movl %esp,PCB_ESP(%edx) |
movl %ebp,PCB_EBP(%edx) |
movl %ebp,PCB_EBP(%edx) |
ret |
ret |
|
|
IDTVEC(osyscall) |
IDTVEC(osyscall) |
#ifndef XEN |
#ifndef XEN |
/* XXX we are in trouble! interrupts be off here. */ |
/* XXX we are in trouble! interrupts be off here. */ |
cli # must be first instruction |
cli /* must be first instruction */ |
#endif |
#endif |
pushfl # set eflags in trap frame |
pushfl /* set eflags in trap frame */ |
popl 8(%esp) |
popl 8(%esp) |
orl $PSL_I,8(%esp) # re-enable ints on return to user |
orl $PSL_I,8(%esp) /* re-enable ints on return to user */ |
pushl $7 # size of instruction for restart |
pushl $7 /* size of instruction for restart */ |
jmp syscall1 |
jmp syscall1 |
IDTVEC_END(osyscall) |
IDTVEC_END(osyscall) |
|
|
Line 1166 IDTVEC_END(osyscall) |
|
Line 1172 IDTVEC_END(osyscall) |
|
* Trap gate entry for syscall |
* Trap gate entry for syscall |
*/ |
*/ |
IDTVEC(syscall) |
IDTVEC(syscall) |
pushl $2 # size of instruction for restart |
pushl $2 /* size of instruction for restart */ |
syscall1: |
syscall1: |
pushl $T_ASTFLT # trap # for doing ASTs |
pushl $T_ASTFLT /* trap # for doing ASTs */ |
INTRENTRY |
INTRENTRY |
STI(%eax) |
STI(%eax) |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
|
|
#endif |
#endif |
1: |
1: |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
addl $1,CPUVAR(NSYSCALL) # count it atomically |
addl $1,CPUVAR(NSYSCALL) /* count it atomically */ |
adcl $0,CPUVAR(NSYSCALL)+4 # count it atomically |
adcl $0,CPUVAR(NSYSCALL)+4 /* count it atomically */ |
movl CPUVAR(CURLWP),%edi |
movl CPUVAR(CURLWP),%edi |
movl L_PROC(%edi),%edx |
movl L_PROC(%edi),%edx |
movl %esp,L_MD_REGS(%edi) # save pointer to frame |
movl %esp,L_MD_REGS(%edi) /* save pointer to frame */ |
pushl %esp |
pushl %esp |
call *P_MD_SYSCALL(%edx) # get pointer to syscall() function |
call *P_MD_SYSCALL(%edx) /* get pointer to syscall() function */ |
addl $4,%esp |
addl $4,%esp |
.Lsyscall_checkast: |
.Lsyscall_checkast: |
/* Check for ASTs on exit to user mode. */ |
/* Check for ASTs on exit to user mode. */ |
|
|
/* process pending interrupts */ |
/* process pending interrupts */ |
CLI(%eax) |
CLI(%eax) |
movl CPUVAR(ILEVEL), %ebx |
movl CPUVAR(ILEVEL), %ebx |
movl $.Lsyscall_resume, %esi # address to resume loop at |
movl $.Lsyscall_resume, %esi /* address to resume loop at */ |
.Lsyscall_resume: |
.Lsyscall_resume: |
movl %ebx,%eax # get cpl |
movl %ebx,%eax /* get cpl */ |
movl CPUVAR(IUNMASK)(,%eax,4),%eax |
movl CPUVAR(IUNMASK)(,%eax,4),%eax |
andl CPUVAR(IPENDING),%eax # any non-masked bits left? |
andl CPUVAR(IPENDING),%eax /* any non-masked bits left? */ |
jz 17f |
jz 17f |
bsrl %eax,%eax |
bsrl %eax,%eax |
btrl %eax,CPUVAR(IPENDING) |
btrl %eax,CPUVAR(IPENDING) |
movl CPUVAR(ISOURCES)(,%eax,4),%eax |
movl CPUVAR(ISOURCES)(,%eax,4),%eax |
jmp *IS_RESUME(%eax) |
jmp *IS_RESUME(%eax) |
17: movl %ebx, CPUVAR(ILEVEL) #restore cpl |
17: movl %ebx, CPUVAR(ILEVEL) /* restore cpl */ |
jmp .Lsyscall_checkast |
jmp .Lsyscall_checkast |
14: |
14: |
#endif /* XEN */ |
#endif /* XEN */ |
|
|
IDTVEC_END(syscall) |
IDTVEC_END(syscall) |
|
|
IDTVEC(svr4_fasttrap) |
IDTVEC(svr4_fasttrap) |
pushl $2 # size of instruction for restart |
pushl $2 /* size of instruction for restart */ |
pushl $T_ASTFLT # trap # for doing ASTs |
pushl $T_ASTFLT /* trap # for doing ASTs */ |
INTRENTRY |
INTRENTRY |
STI(%eax) |
STI(%eax) |
pushl $RW_READER |
pushl $RW_READER |
Line 1269 IDTVEC(svr4_fasttrap) |
|
Line 1275 IDTVEC(svr4_fasttrap) |
|
addl $4,%esp |
addl $4,%esp |
2: /* Check for ASTs on exit to user mode. */ |
2: /* Check for ASTs on exit to user mode. */ |
cli |
cli |
CHECK_ASTPENDING(%eax) |
CHECK_ASTPENDING(%eax) |
je 1f |
je 1f |
/* Always returning to user mode here. */ |
/* Always returning to user mode here. */ |
CLEAR_ASTPENDING(%eax) |
CLEAR_ASTPENDING(%eax) |
Line 1287 IDTVEC(svr4_fasttrap) |
|
Line 1293 IDTVEC(svr4_fasttrap) |
|
cli |
cli |
jmp 2b |
jmp 2b |
|
|
#if NNPX > 0 |
|
/* |
|
* Special interrupt handlers. Someday intr0-intr15 will be used to count |
|
* interrupts. We'll still need a special exception 16 handler. The busy |
|
* latch stuff in probintr() can be moved to npxprobe(). |
|
*/ |
|
|
|
/* |
|
* void probeintr(void) |
|
*/ |
|
NENTRY(probeintr) |
|
ss |
|
incl _C_LABEL(npx_intrs_while_probing) |
|
pushl %eax |
|
movb $0x20,%al # EOI (asm in strings loses cpp features) |
|
outb %al,$0xa0 # IO_ICU2 |
|
outb %al,$0x20 # IO_ICU1 |
|
movb $0,%al |
|
outb %al,$0xf0 # clear BUSY# latch |
|
popl %eax |
|
iret |
|
END(probeintr) |
|
|
|
/* |
|
* void probetrap(void) |
|
*/ |
|
NENTRY(probetrap) |
|
ss |
|
incl _C_LABEL(npx_traps_while_probing) |
|
fnclex |
|
iret |
|
END(probetrap) |
|
|
|
/* |
/* |
* int npx586bug1(int a, int b) |
* int npx586bug1(int a, int b) |
|
* Used when checking for the FDIV bug on first generations pentiums. |
|
* Anything 120MHz or above is fine. |
*/ |
*/ |
NENTRY(npx586bug1) |
NENTRY(npx586bug1) |
fildl 4(%esp) # x |
fildl 4(%esp) /* x */ |
fildl 8(%esp) # y |
fildl 8(%esp) /* y */ |
fld %st(1) |
fld %st(1) |
fdiv %st(1),%st # x/y |
fdiv %st(1),%st /* x/y */ |
fmulp %st,%st(1) # (x/y)*y |
fmulp %st,%st(1) /* (x/y)*y */ |
fsubrp %st,%st(1) # x-(x/y)*y |
fsubrp %st,%st(1) /* x-(x/y)*y */ |
pushl $0 |
pushl $0 |
fistpl (%esp) |
fistpl (%esp) |
popl %eax |
popl %eax |
ret |
ret |
END(npx586bug1) |
END(npx586bug1) |
#endif /* NNPX > 0 */ |
|
|
|
/* |
/* |
* void sse2_idlezero_page(void *pg) |
* void sse2_idlezero_page(void *pg) |