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2002-08-07 Roland McGrath <roland@redhat.com>

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* sysdeps/i386/tls.h (TLS_DO_MODIFY_LDT): Add an extra argument with
	an "m" constraint to the asm so the compiler knows LDT_ENTRY was used.
This commit is contained in:
Roland McGrath
2002-08-08 04:58:30 +00:00
parent ec6170f59b
commit 939f249c81
1 changed files with 6 additions and 2 deletions
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8
linuxthreads/sysdeps/i386/tls.h
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@ -94,12 +94,16 @@ typedef struct
{ nr, (unsigned long int) (descr), sizeof (struct _pthread_descr_struct), \
1, 0, 0, 0, 0, 1, 0 }; \
int result; \
asm ("pushl %%ebx\n\t" \
asm volatile ( \
"pushl %%ebx\n\t" \
"movl $1, %%ebx\n\t" \
"int $0x80\n\t" \
"popl %%ebx" \
: "=a" (result) \
: "0" (__NR_modify_ldt), "d" (sizeof (ldt_entry)), "c" (&ldt_entry)); \
: "0" (__NR_modify_ldt), \
/* The extra argument with the "m" constraint is necessary \
to let the compiler know that we are accessing LDT_ENTRY here. */\
"m" (ldt_entry), "c" (&ldt_entry), "d" (sizeof (ldt_entry))); \
__builtin_expect (result, 0) != 0 ? -1 : nr * 8 + 7; \
})