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* [Bug c/67169] New: -fstack-check=no doesn't disable stack checking
@ 2015-08-10 11:12 dwmw2 at infradead dot org
2015-08-15 11:48 ` [Bug target/67169] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: dwmw2 at infradead dot org @ 2015-08-10 11:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
Bug ID: 67169
Summary: -fstack-check=no doesn't disable stack checking
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dwmw2 at infradead dot org
Target Milestone: ---
$ echo 'void foo(void) { char lots[8192]; }' | i686-w64-mingw32-gcc -S -o- -xc
- -fstack-check=no
.file ""
.text
.globl _foo
.def _foo; .scl 2; .type 32; .endef
_foo:
pushl %ebp
movl %esp, %ebp
movl $8192, %eax
call ___chkstk_ms
subl %eax, %esp
nop
leave
ret
.ident "GCC: (GNU) 5.1.0 20150422 (Fedora MinGW 5.1.0-2.fc22)"
This is causing me problems when building the EDK II UEFI implementation.
Building that with MinGW is useful because it reproduces a number of
LLP64-related issues which would otherwise require Windows to discover.
If I use '-fstack-check=specific' *that* does seem to do what I want. But I'm
not sure I should be suggesting that as an upstream fix for the MinGW build,
because it seems wrong.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug target/67169] -fstack-check=no doesn't disable stack checking
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
@ 2015-08-15 11:48 ` pinskia at gcc dot gnu.org
2015-08-15 13:27 ` dwmw2 at infradead dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-08-15 11:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i686-w64-mingw32
Component|c |target
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I suspect i686-w64-mingw32 can never be used for self host binaries.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug target/67169] -fstack-check=no doesn't disable stack checking
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
2015-08-15 11:48 ` [Bug target/67169] " pinskia at gcc dot gnu.org
@ 2015-08-15 13:27 ` dwmw2 at infradead dot org
2015-09-10 7:35 ` ebotcazou at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: dwmw2 at infradead dot org @ 2015-08-15 13:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
--- Comment #2 from David Woodhouse <dwmw2 at infradead dot org> ---
(In reply to Andrew Pinski from comment #1)
> I suspect i686-w64-mingw32 can never be used for self host binaries.
It has been. EDKII has toolchain configurations for it:
http://tianocore.sourceforge.net/wiki/Unix-like_systems#Build_gcc_x64_UEFI_cross_compiler
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug target/67169] -fstack-check=no doesn't disable stack checking
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
2015-08-15 11:48 ` [Bug target/67169] " pinskia at gcc dot gnu.org
2015-08-15 13:27 ` dwmw2 at infradead dot org
@ 2015-09-10 7:35 ` ebotcazou at gcc dot gnu.org
2015-09-10 8:45 ` dwmw2 at infradead dot org
2015-09-10 8:58 ` [Bug target/67169] add an option to disable stack checking on x86 for UEFI ebotcazou at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2015-09-10 7:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> If I use '-fstack-check=specific' *that* does seem to do what I want. But
> I'm not sure I should be suggesting that as an upstream fix for the MinGW
> build, because it seems wrong.
No, -fstack-check=specific only changes the stack checking method. In any
case, stack checking is required by the ABI on Windows so cannot be disabled.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug target/67169] -fstack-check=no doesn't disable stack checking
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
` (2 preceding siblings ...)
2015-09-10 7:35 ` ebotcazou at gcc dot gnu.org
@ 2015-09-10 8:45 ` dwmw2 at infradead dot org
2015-09-10 8:58 ` [Bug target/67169] add an option to disable stack checking on x86 for UEFI ebotcazou at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: dwmw2 at infradead dot org @ 2015-09-10 8:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
--- Comment #4 from David Woodhouse <dwmw2 at infradead dot org> ---
It's required by Windows but not by UEFI, which otherwise has the same ABI. We
had previously been able to build UEFI firmware with MinGW.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug target/67169] add an option to disable stack checking on x86 for UEFI
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
` (3 preceding siblings ...)
2015-09-10 8:45 ` dwmw2 at infradead dot org
@ 2015-09-10 8:58 ` ebotcazou at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2015-09-10 8:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67169
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2015-09-10
Resolution|INVALID |---
Summary|-fstack-check=no doesn't |add an option to disable
|disable stack checking |stack checking on x86 for
| |UEFI
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> It's required by Windows but not by UEFI, which otherwise has the same ABI.
OK. Let's reopen it as a target-specific enhancement request then.
> We had previously been able to build UEFI firmware with MinGW.
Presumably because you had only small frames?
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-09-10 8:58 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-08-10 11:12 [Bug c/67169] New: -fstack-check=no doesn't disable stack checking dwmw2 at infradead dot org
2015-08-15 11:48 ` [Bug target/67169] " pinskia at gcc dot gnu.org
2015-08-15 13:27 ` dwmw2 at infradead dot org
2015-09-10 7:35 ` ebotcazou at gcc dot gnu.org
2015-09-10 8:45 ` dwmw2 at infradead dot org
2015-09-10 8:58 ` [Bug target/67169] add an option to disable stack checking on x86 for UEFI ebotcazou at gcc dot gnu.org
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