version 1.47.4.8, 2007/10/23 20:13:02 |
version 1.48.8.7, 2007/12/09 19:35:21 |
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*/ |
*/ |
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#include "opt_compat_oldboot.h" |
#include "opt_compat_oldboot.h" |
#include "opt_cputype.h" |
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#include "opt_ddb.h" |
#include "opt_ddb.h" |
#include "opt_realmem.h" |
#include "opt_realmem.h" |
#include "opt_vm86.h" |
#include "opt_vm86.h" |
Line 764 ENTRY(cpu_switchto) |
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Line 763 ENTRY(cpu_switchto) |
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/* Switch TSS. Reset "task busy" flag before loading. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
movl %cr3,%eax |
movl %cr3,%eax |
movl %eax,PCB_CR3(%ebx) # for TSS gates |
movl %eax,PCB_CR3(%ebx) # for TSS gates |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%ecx |
movl L_MD_TSS_SEL(%edi),%edx |
movl L_MD_TSS_SEL(%edi),%edx |
andl $~0x0200,4(%eax,%edx, 1) |
andl $~0x0200,4(%ecx,%edx, 1) |
ltr %dx |
ltr %dx |
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/* 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 $LW_SYSTEM,L_FLAG(%edi) |
testl $LW_SYSTEM,L_FLAG(%edi) |
jnz 4f |
jnz 4f |
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/* Restore thread-private %fs/%gs descriptors. */ |
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movl PCB_FSD(%ebx), %eax |
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movl PCB_FSD+4(%ebx), %edx |
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movl %eax, (GUFS_SEL*8)(%ecx) |
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movl %edx, (GUFS_SEL*8+4)(%ecx) |
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movl PCB_GSD(%ebx), %eax |
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movl PCB_GSD+4(%ebx), %edx |
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movl %eax, (GUGS_SEL*8)(%ecx) |
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movl %edx, (GUGS_SEL*8+4)(%ecx) |
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/* Is this process using RAS (restartable atomic sequences)? */ |
/* Is this process using RAS (restartable atomic sequences)? */ |
movl L_PROC(%edi),%eax |
movl L_PROC(%edi),%eax |
cmpl $0,P_RASLIST(%eax) |
cmpl $0,P_RASLIST(%eax) |
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pushl $4f |
pushl $4f |
call _C_LABEL(printf) |
call _C_LABEL(printf) |
addl $4,%esp |
addl $4,%esp |
#ifdef DDB |
pushl $IPL_NONE |
int $3 |
call _C_LABEL(spllower) |
#endif /* DDB */ |
addl $4,%esp |
movl $IPL_NONE,CPUVAR(ILEVEL) |
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jmp .Lsyscall_checkast |
jmp .Lsyscall_checkast |
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" |