------- Comment #2 from valery_reznic at yahoo dot com 2009-02-06 07:12 -------
(In reply to comment #1)
> r11 is saved by the caller so this is the generated code is valid.
> Since nothing else uses r11 in the inline-asm, the code is correct.
The problem is not that r11 not saved at stack, but that saved on the stack
value of r15 ALWAYS will be overwritten - by the 'call my_syscall' instruction
and saved on the stack values of rbx, r12, r13 and r14 MAY BE overritten if
my_syscall function wrote something to the stack
> From the i386.h header:
> The value is zero if the register is not call used on either 32 or
> 64 bit targets, one if the register if call used on both 32 and 64
> bit targets, two if it is only call used on 32bit targets and three
> if its only call used on 64bit targets.
> /* r8, r9, r10, r11, r12, r13, r14, r15*/ \
> 1, 1, 1, 1, 2, 2, 2, 2, \
>
--
valery_reznic at yahoo dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39078
