https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #15 from CVS Commits ---
The master branch has been updated by H.J. Lu :
https://gcc.gnu.org/g:745d04e796c1a7ebcea0185d0742d58b0c0030ab
commit r11-6557-g745d04e796c1a7ebcea0185d0742d58b0c0030ab
Author: H.J. Lu
Date: Fri Jan 8
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #14 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #10)
> If we are emitting for nested functions
> pushq %r10
> 1:call__fentry__
> popq%r10
> (is it ok to misalign the stack for __fentry__?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #13 from H.J. Lu ---
Fixed for GCC 11 so far. Please open a new GCC bug for mcount stack
alignment.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #12 from CVS Commits ---
The master branch has been updated by H.J. Lu :
https://gcc.gnu.org/g:76be18f442948d1a4bc49a7d670b07097f9e5983
commit r11-6552-g76be18f442948d1a4bc49a7d670b07097f9e5983
Author: H.J. Lu
Date: Fri Jan 8
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #11 from CVS Commits ---
The master branch has been updated by H.J. Lu :
https://gcc.gnu.org/g:1b885264a48dcd71b7aeb26c0abeb91246724897
commit r11-6548-g1b885264a48dcd71b7aeb26c0abeb91246724897
Author: H.J. Lu
Date: Thu Jan 7
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #9 from Uroš Bizjak ---
(In reply to Topi Miettinen from comment #8)
> I'm unfortunately ignorant to GCC internals and usage of %r10, but otherwise
> the patch looks good to me.
>
> For -mcmodel=large -fPIC, the call sequence
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #8 from Topi Miettinen ---
I'm unfortunately ignorant to GCC internals and usage of %r10, but otherwise
the patch looks good to me.
For -mcmodel=large -fPIC, the call sequence probably needs to be similar to how
other extern
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #7 from Hongtao.liu ---
(In reply to H.J. Lu from comment #6)
> A patch is posted at
>
> https://gcc.gnu.org/pipermail/gcc-patches/2021-January/563033.html
Yes, %r10 is pushed before __fentry__
cat test.c
void func(int
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
H.J. Lu changed:
What|Removed |Added
Ever confirmed|0 |1
Last reconfirmed|2021-01-04 00:00:00
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #5 from Uroš Bizjak ---
(In reply to Topi Miettinen from comment #4)
> Sorry, I didn't check the ABI. It seems that %r11 and maybe %r10 should be
> usable:
%r11 is already used as PROFILE_COUNT_REGISTER for !NO_PROFILE_COUNTERS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #4 from Topi Miettinen ---
Sorry, I didn't check the ABI. It seems that %r11 and maybe %r10 should be
usable:
Figure 3.4: Register Usage
Register
Usage
Preserved across function calls
%r10
temporary register, used for passing a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #3 from Uroš Bizjak ---
(In reply to Uroš Bizjak from comment #2)
> (In reply to Hongtao.liu from comment #1)
> > and by the time of output __fentry__ in gcc, register is already accocated,
> > is there any regs supposed to be safe
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #2 from Uroš Bizjak ---
(In reply to Hongtao.liu from comment #1)
> and by the time of output __fentry__ in gcc, register is already accocated,
> is there any regs supposed to be safe in the entry of function? or we need
> to spill
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482
--- Comment #1 from Hongtao.liu ---
(In reply to Topi Miettinen from comment #0)
> GCC on x86_64 with `-mfentry` generates invalid code for `-mcmodel=large`.
> The call to `__fentry__` uses plain `call` instruction, but this can only
> address
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