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authorRoland McGrath <roland@gnu.org>2002-08-08 04:58:30 +0000
committerRoland McGrath <roland@gnu.org>2002-08-08 04:58:30 +0000
commit939f249c81c4bff410fbe2befe186059c605d329 (patch)
treed89c46ee720162d4dff943203caebbe06d47f76c /linuxthreads
parentec6170f59b44bb0e9c40c263cba3d88f80db884c (diff)
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2002-08-07 Roland McGrath <roland@redhat.com>
* 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.
Diffstat (limited to 'linuxthreads')
-rw-r--r--linuxthreads/sysdeps/i386/tls.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/linuxthreads/sysdeps/i386/tls.h b/linuxthreads/sysdeps/i386/tls.h
index 55ccecc..a00de6c 100644
--- a/linuxthreads/sysdeps/i386/tls.h
+++ b/linuxthreads/sysdeps/i386/tls.h
@@ -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; \
})