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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/44290] [4.5 Regression] arm linux kernel crahes when built with -fipa-sra, __naked attribute is broken
Date: Sat, 29 May 2010 11:47:00 -0000 [thread overview]
Message-ID: <20100529114708.27901.qmail@sourceware.org> (raw)
In-Reply-To: <bug-44290-10179@http.gcc.gnu.org/bugzilla/>
------- Comment #10 from rguenth at gcc dot gnu dot org 2010-05-29 11:47 -------
Or rather, if you have
void __attribute__((naked)) foo (int i)
{
asm("use i");
}
without any inputs refering to i that is invalid. Like I see in the
attached preprocessed source:
static void __attribute__((naked)) __attribute__((no_instrument_function))
v4wb_copy_user_page(void *kto, const void *kfrom)
{
asm(" stmfd sp!, {r4, lr} @ 2\n mov r2, %0
@ 1\n ldmia r1!, {r3, r4, ip, lr} @ 4\n1: mcr
p15, 0, r0, c7, c6, 1 @ 1 invalidate D line\n stmia r0!,
{r3, r4, ip, lr} @ 4\n ldmia r1!, {r3, r4, ip, lr} @
4+1\n stmia r0!, {r3, r4, ip, lr} @ 4\n ldmia r1!, {r3, r4, ip,
lr} @ 4\n mcr p15, 0, r0, c7, c6, 1 @ 1 invalidate
D line\n stmia r0!, {r3, r4, ip, lr} @ 4\n ldmia r1!,
{r3, r4, ip, lr} @ 4\n subs r2, r2, #1 @
1\n stmia r0!, {r3, r4, ip, lr} @ 4\n ldmneia r1!, {r3, r4, ip,
lr} @ 4\n bne 1b @ 1\n mcr
p15, 0, r1, c7, c10, 4 @ 1 drain WB\n ldmfd sp!, {r4, pc}
@ 3"
# 46 "/home/kraj/work/linux-2.6.34/arch/arm/mm/copypage-v4wb.c"
:
: "I" (((1UL) << 12) / 64));
}
kto and kfrom are unused.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44290
next prev parent reply other threads:[~2010-05-29 11:47 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-27 6:26 [Bug tree-optimization/44290] New: arm linux kernel crahes when built with -fipa-sra raj dot khem at gmail dot com
2010-05-27 7:07 ` [Bug tree-optimization/44290] " raj dot khem at gmail dot com
2010-05-27 7:13 ` raj dot khem at gmail dot com
2010-05-27 10:41 ` [Bug tree-optimization/44290] [4.5 Regression] " rguenth at gcc dot gnu dot org
2010-05-27 17:26 ` raj dot khem at gmail dot com
2010-05-27 17:27 ` raj dot khem at gmail dot com
2010-05-28 11:49 ` mikpe at it dot uu dot se
2010-05-28 22:03 ` mikpe at it dot uu dot se
2010-05-29 11:36 ` mikpe at it dot uu dot se
2010-05-29 11:43 ` [Bug target/44290] [4.5 Regression] arm linux kernel crahes when built with -fipa-sra, __naked attribute is broken rguenth at gcc dot gnu dot org
2010-05-29 11:47 ` rguenth at gcc dot gnu dot org [this message]
2010-05-29 11:50 ` rguenth at gcc dot gnu dot org
2010-05-29 13:30 ` Andrew Pinski
2010-05-29 13:30 ` pinskia at gmail dot com
2010-05-29 14:27 ` mikpe at it dot uu dot se
2010-05-29 14:40 ` mikpe at it dot uu dot se
2010-05-29 14:45 ` [Bug target/44290] [4.5 Regression] " rguenth at gcc dot gnu dot org
2010-05-29 14:46 ` rguenth at gcc dot gnu dot org
2010-05-29 14:47 ` mikpe at it dot uu dot se
2010-05-29 18:00 ` mikpe at it dot uu dot se
2010-05-30 5:58 ` raj dot khem at gmail dot com
2010-05-30 6:55 ` raj dot khem at gmail dot com
2010-05-30 17:04 ` rguenth at gcc dot gnu dot org
2010-07-23 14:48 ` jiez at gcc dot gnu dot org
2010-07-23 14:51 ` jiez at gcc dot gnu dot org
2010-07-23 14:52 ` jiez at gcc dot gnu dot org
2010-07-26 8:05 ` [Bug target/44290] [4.5 only] " ramana at gcc dot gnu dot org
2010-07-26 14:38 ` jiez at gcc dot gnu dot org
2010-07-27 17:34 ` jiez at gcc dot gnu dot org
2010-07-31 9:35 ` rguenth at gcc dot gnu dot org
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