* RFC: Disallow undocumented IA32 TLS GD access
@ 2007-08-23 15:03 H.J. Lu
2007-08-23 16:10 ` Ulrich Drepper
0 siblings, 1 reply; 2+ messages in thread
From: H.J. Lu @ 2007-08-23 15:03 UTC (permalink / raw)
To: binutils; +Cc: gcc, GNU C Library
IA32 TLS GD access model specifies
leal foo@TLSGD(,%ebx,1), %eax
call ___tls_get_addr
But the current linker also accepts
leal foo@TLSGD(%ebx), %eax
call ___tls_get_addr
However, GD->IE transition needs one more byte to change it to
movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax
I'd like to change the linker to accept
leal foo@TLSGD(%ebx), %eax
call ___tls_get_addr
only if there is a nop after it. Is there any objection?
H.J.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: RFC: Disallow undocumented IA32 TLS GD access
2007-08-23 15:03 RFC: Disallow undocumented IA32 TLS GD access H.J. Lu
@ 2007-08-23 16:10 ` Ulrich Drepper
0 siblings, 0 replies; 2+ messages in thread
From: Ulrich Drepper @ 2007-08-23 16:10 UTC (permalink / raw)
To: H.J. Lu; +Cc: binutils, gcc, GNU C Library
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H.J. Lu wrote:
> Is there any objection?
No, this is correct and necessary.
- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA â–
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2007-08-23 16:10 ` Ulrich Drepper
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