linux/arch
Zou Nan hai acb15c85de [IA64] Do not assume output registers be reservered.
We found an issue in pal.S.

According to the software runtime SPEC,
The caller's output registers do not need to be preserved for
caller. The callee may reuse input registers for any other
purpose within the procedure.

in ia64_pal_call_phys_stacked,

input registers are copied to output registers before call
into ia64_switch_mode_phys, then used to call into PAL. This
assumes output registers are preserved in ia64_switch_mode_phys,
which may not be true.

In this particular case, ia64_switch_mode_phys alloc a null frame
, and mask off psr.i.
If an interrupt comes at this small window,
or an MCA comes inside the procedure, output registers
maybe changed,
then the pal call may got some staled input registers.

This patch moves the copies from input to output
after ia64_switch_mode_phys to follow the software
runtime convention.

It  also removed some unused labels in
ia64_pal_call_phys_stacked.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-08-02 16:12:08 -07:00
..
alpha [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
arm [ARM] 3734/1: Fix the unused variable warning in __iounmap() 2006-07-29 08:29:30 +01:00
arm26 [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
cris [PATCH] pcf8563: remove MOD_INC_USE_COUNT, MOD_DEC_USE_COUNT 2006-07-10 13:24:22 -07:00
frv [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
h8300 [PATCH] irq-flags: H8300: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
i386 [PATCH] i386: Fix up backtrace fallback patch 2006-07-29 20:59:55 -07:00
ia64 [IA64] Do not assume output registers be reservered. 2006-08-02 16:12:08 -07:00
m32r [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
m68k [PATCH] irq-flags: M68K: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
m68knommu [PATCH] irq-flags: M68KNOMMU: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
mips [MIPS] sparsemem: fix crash in show_mem 2006-07-13 21:26:22 +01:00
parisc [PATCH] vt: Remove VT-specific declarations and definitions from tty.h 2006-07-10 13:24:16 -07:00
powerpc [PATCH] powermac: Combined fixes for backlight code 2006-07-10 13:24:20 -07:00
ppc [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
s390 [S390] update default configuration 2006-07-27 14:04:57 +02:00
sh [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
sh64 [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
sparc [SPARC]: Defer clock_probe to fs_initcall() 2006-07-27 22:08:01 -07:00
sparc64 [SPARC64]: Explicitly print return PC when the kernel fault PC is bogus. 2006-07-24 22:33:58 -07:00
um [PATCH] UML - fix utsname build breakage 2006-07-15 14:42:24 -07:00
v850 [PATCH] irq-flags: V850: Use the new IRQF_ constants 2006-07-02 13:58:48 -07:00
x86_64 [PATCH] x86_64: Fix swiotlb=force 2006-07-29 20:59:55 -07:00
xtensa [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00