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Update.

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* sysdeps/i386/useldt.h: Go back to using 16-bit instructions when
	loading/reading segment registers.  Some old hardware doesn't
	handle the 32-bit instructions as expected.
	* sysdeps/i386/tls.h: Likewise.
This commit is contained in:
Ulrich Drepper 2002-08-21 02:35:30 +00:00
parent 9d69bd2492
commit c761cdf5a0
3 changed files with 13 additions and 8 deletions
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5
linuxthreads/ChangeLog
View File

@ -1,5 +1,10 @@
2002-08-20 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/useldt.h: Go back to using 16-bit instructions when
loading/reading segment registers. Some old hardware doesn't
handle the 32-bit instructions as expected.
* sysdeps/i386/tls.h: Likewise.
* sysdeps/i386/tls.h (TLS_DO_SET_THREAD_AREA): Second parameter is
renamed to secondcall and use is negated.
(TLS_SETUP_GS_SEGMENT): Likewise.

6
linuxthreads/sysdeps/i386/tls.h
View File

@ -123,8 +123,8 @@ typedef struct
int result; \
if (secondcall) \
ldt_entry.entry_number = ({ int _gs; \
asm ("movl %%gs, %0" : "=q" (_gs)); \
_gs >> 3; }); \
asm ("movw %%gs, %w0" : "=q" (_gs)); \
(_gs & 0xffff) >> 3; }); \
asm volatile (TLS_LOAD_EBX \
"int $0x80\n\t" \
TLS_LOAD_EBX \
@ -164,7 +164,7 @@ typedef struct
__gs = TLS_SETUP_GS_SEGMENT (_descr, secondcall); \
if (__builtin_expect (__gs, 7) != -1) \
{ \
asm ("movl %0, %%gs" : : "q" (__gs)); \
asm ("movw %w0, %%gs" : : "q" (__gs)); \
__gs = 0; \
} \
__gs; \

10
linuxthreads/sysdeps/i386/useldt.h
View File

@ -72,7 +72,7 @@ extern int __modify_ldt (int, struct modify_ldt_ldt_s *, size_t);
1, 0, 0, 0, 0, 1, 0 }; \
if (__modify_ldt (1, &ldt_entry, sizeof (ldt_entry)) != 0) \
abort (); \
asm ("movl %0, %%gs" : : "q" (nr * 8 + 7)); \
asm ("movw %w0, %%gs" : : "q" (nr * 8 + 7)); \
})
/* When using the new set_thread_area call, we don't need to change %gs
@ -83,13 +83,13 @@ extern int __modify_ldt (int, struct modify_ldt_ldt_s *, size_t);
({ \
int __gs; \
struct modify_ldt_ldt_s ldt_entry = \
{ ({ asm ("movl %%gs, %0" : "=q" (__gs)); __gs >> 3; }), \
{ ({ asm ("movw %%gs, %w0" : "=q" (__gs)); (__gs & 0xffff) >> 3; }), \
(unsigned long int) descr, sizeof (struct _pthread_descr_struct), \
1, 0, 0, 0, 0, 1, 0 }; \
if (__builtin_expect (INLINE_SYSCALL (set_thread_area, 1, &ldt_entry) == 0, \
1)) \
asm ("movl %0, %%gs" :: "q" (__gs)); \
else \
asm ("movw %w0, %%gs" :: "q" (__gs)); \
else \
__gs = -1; \
__gs; \
})
@ -117,7 +117,7 @@ extern int __have_no_set_thread_area;
#define FREE_THREAD(descr, nr) \
{ \
int __gs; \
__asm__ __volatile__ ("movl %%gs, %0" : "=q" (__gs)); \
__asm__ __volatile__ ("movw %%gs, %w0" : "=q" (__gs)); \
if (__builtin_expect (__gs & 4, 0)) \
{ \
struct modify_ldt_ldt_s ldt_entry = \