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Code Issues Releases Activity

i386_set_ldt() is not available when running 32 bit binaries on amd64

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kernels.  Use the recently exposed direct-set routines instead.  This is
only activated for when we compile i386 support libraries on amd64.
This commit is contained in:
Peter Wemm 2004-11-06 03:35:51 +00:00
parent 2cdea9a39f
commit 9e6d5a03d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=137295
4 changed files with 26 additions and 0 deletions
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6
lib/libkse/arch/i386/i386/pthread_md.c
View File

@ -76,7 +76,9 @@ _tcb_dtor(struct tcb *tcb)
struct kcb *
_kcb_ctor(struct kse *kse)
{
#ifndef COMPAT_32BIT
union descriptor ldt;
#endif
struct kcb *kcb;
kcb = malloc(sizeof(struct kcb));
@ -84,6 +86,7 @@ _kcb_ctor(struct kse *kse)
bzero(kcb, sizeof(struct kcb));
kcb->kcb_self = kcb;
kcb->kcb_kse = kse;
#ifndef COMPAT_32BIT
ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
@ -99,6 +102,7 @@ _kcb_ctor(struct kse *kse)
free(kcb);
return (NULL);
}
#endif
}
return (kcb);
}
@ -106,9 +110,11 @@ _kcb_ctor(struct kse *kse)
void
_kcb_dtor(struct kcb *kcb)
{
#ifndef COMPAT_32BIT
if (kcb->kcb_ldt >= 0) {
i386_set_ldt(kcb->kcb_ldt, NULL, 1);
kcb->kcb_ldt = -1; /* just in case */
}
#endif
free(kcb);
}

7
lib/libkse/arch/i386/include/pthread_md.h
View File

@ -32,7 +32,9 @@
#define _PTHREAD_MD_H_
#include <stddef.h>
#include <sys/types.h>
#include <sys/kse.h>
#include <machine/sysarch.h>
#include <ucontext.h>
extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
@ -150,10 +152,15 @@ void _kcb_dtor(struct kcb *);
static __inline void
_kcb_set(struct kcb *kcb)
{
#ifndef COMPAT_32BIT
int val;
val = (kcb->kcb_ldt << 3) | 7;
__asm __volatile("movl %0, %%gs" : : "r" (val));
#else
_amd64_set_gsbase(kcb);
#endif
}
/* Get the current kcb. */

6
lib/libpthread/arch/i386/i386/pthread_md.c
View File

@ -76,7 +76,9 @@ _tcb_dtor(struct tcb *tcb)
struct kcb *
_kcb_ctor(struct kse *kse)
{
#ifndef COMPAT_32BIT
union descriptor ldt;
#endif
struct kcb *kcb;
kcb = malloc(sizeof(struct kcb));
@ -84,6 +86,7 @@ _kcb_ctor(struct kse *kse)
bzero(kcb, sizeof(struct kcb));
kcb->kcb_self = kcb;
kcb->kcb_kse = kse;
#ifndef COMPAT_32BIT
ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
@ -99,6 +102,7 @@ _kcb_ctor(struct kse *kse)
free(kcb);
return (NULL);
}
#endif
}
return (kcb);
}
@ -106,9 +110,11 @@ _kcb_ctor(struct kse *kse)
void
_kcb_dtor(struct kcb *kcb)
{
#ifndef COMPAT_32BIT
if (kcb->kcb_ldt >= 0) {
i386_set_ldt(kcb->kcb_ldt, NULL, 1);
kcb->kcb_ldt = -1; /* just in case */
}
#endif
free(kcb);
}

7
lib/libpthread/arch/i386/include/pthread_md.h
View File

@ -32,7 +32,9 @@
#define _PTHREAD_MD_H_
#include <stddef.h>
#include <sys/types.h>
#include <sys/kse.h>
#include <machine/sysarch.h>
#include <ucontext.h>
extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
@ -150,10 +152,15 @@ void _kcb_dtor(struct kcb *);
static __inline void
_kcb_set(struct kcb *kcb)
{
#ifndef COMPAT_32BIT
int val;
val = (kcb->kcb_ldt << 3) | 7;
__asm __volatile("movl %0, %%gs" : : "r" (val));
#else
_amd64_set_gsbase(kcb);
#endif
}
/* Get the current kcb. */