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Author SHA1 Message Date
Eric W. Biederman
a928972864 [PATCH] Don't uselessly export task_struct to userspace in core dumps 
task_struct is an internal structure to the kernel with a lot of good
information, that is probably interesting in core dumps.  However there is
no way for user space to know what format that information is in making it
useless.

I grepped the GDB 6.3 source code and NT_TASKSTRUCT while defined is not
used anywhere else.  So I would be surprised if anyone notices it is
missing.

In addition exporting kernel pointers to all the interesting kernel data
structures sounds like the very definition of an information leak.  I
haven't a clue what someone with evil intentions could do with that
information, but in any attack against the kernel it looks like this is the
perfect tool for aiming that attack.

So since NT_TASKSTRUCT is useless as currently defined and is potentially
dangerous, let's just not export it.

(akpm: Daniel Jacobowitz <dan@debian.org> "would be amazed" if anything was
using NT_TASKSTRUCT).

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 2005-10-30 17:37:18 -08:00
Hugh Dickins
404351e67a [PATCH] mm: mm_init set_mm_counters 
How is anon_rss initialized?  In dup_mmap, and by mm_alloc's memset; but
that's not so good if an mm_counter_t is a special type.  And how is rss
initialized?  By set_mm_counter, all over the place.  Come on, we just need to
initialize them both at once by set_mm_counter in mm_init (which follows the
memcpy when forking).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 2005-10-29 21:40:38 -07:00
Ralf Baechle
030274ae03 Remove useless casts of kmalloc return values. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:50 +01:00
Andrew Isaacson
93ce2f524e Add support for SB1A CPU. 
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:46 +01:00
Andrew Isaacson
d121ced21d Sibyte fixes 
Fix typo in cpu_probe_sibyte.
    
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:45 +01:00
Ralf Baechle
f4c72cc737 Get 64-bit right in the kgdb stub. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:43 +01:00
Ralf Baechle
0d507d61cd Sys_lookup_dcookie arguments occupy 4 argument slots. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:43 +01:00
Ralf Baechle
12616ed202 FPU emulator garbage collection. 
First argument of fpu_emulator_cop1Handler() was unused.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:43 +01:00
Ralf Baechle
178086c86a Don't print file name and line in die and die_if_kernel. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:42 +01:00
Ralf Baechle
9383292f17 Date: Fri Jan 14 03:03:23 2005 +0000 
Locking cleanups.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:39 +01:00
Ralf Baechle
ec917c2c1a Fixup a few lose ends in explicit support for MIPS R1/R2. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:37 +01:00
Ralf Baechle
101b3531a6 Protect manipulation of c0_status against preemption and multithreading. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:36 +01:00
Ralf Baechle
8afcb5d829 Detect 4KSD and treat it like 4KSc. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:36 +01:00
Ralf Baechle
57468af326 Define and initialize kdb_lock using DEFINE_SPINLOCK. 
Convert kgdb_cpulock into a raw_spinlock_t.
    
SPIN_LOCK_UNLOCKED is deprecated and it's replacement DEFINE_SPINLOCK is
not suitable for arrays of spinlocks.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:35 +01:00
Ralf Baechle
f8bb3af924 Make kgdb_wait static. 
Nothing outside gdb-stub.c uses kgdb_wait, so change it's definition to
static.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:34 +01:00
Ralf Baechle
02cf211968 Cleanup the mess in cpu_cache_init. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:32 +01:00
Ralf Baechle
c78cbf49c4 Support for MIPSsim, the cycle accurate MIPS simulator. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:30 +01:00
Ralf Baechle
b288f13587 Switch Sibyte profiling driver to ->compat_ioctl 
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:29 +01:00
Daniel Jacobowitz
ea3d710fe5 Revise MIPS 64-bit ptrace interface 
Change the N32 debugging ABI to something more sane, and add support
for o32 and n32 debuggers to trace n64 programs.
    
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:29 +01:00
Ralf Baechle
0bf0e3e279 Fix excessive signal latencies. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:23 +01:00
Ralf Baechle
5bcb9a58e6 Move genrtc.c's functions into <asm/rtc.h> 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:15 +01:00
Ralf Baechle
340ee4b98c Virtual SMP support for the 34K. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:10 +01:00
Ralf Baechle
d03d0a5775 MT bulletproofing. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:09 +01:00
Ralf Baechle
e027802e98 Display presence of SmartMIPS, DSP and MT ASEs in /proc/cpuinfo. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:05 +01:00
Ralf Baechle
3bffe736d9 Delete old junk. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:04 +01:00
Ralf Baechle
28a7879d8c Spelling fix. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:03 +01:00
Ralf Baechle
d9912d8784 Inlining will result in back-to-back mtc0 mfc0 instructions. Break the 
hazard by using back_to_back_c0_hazard().

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:32:00 +01:00
Ralf Baechle
8d9c62675d sys is only used for native o32 ... 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:58 +01:00
Thiemo Seufer
075e7502d9 R4600 has 32 FPRs. 
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:58 +01:00
Ralf Baechle
ae1b3d51c8 Make sure that the processor is actually online or die spectacularly. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:55 +01:00
Ralf Baechle
1d40cfcd34 Avoid SMP cacheflushes. This is a minor optimization of startup but 
will also avoid smp_call_function from doing stupid things when called
from a CPU that is not yet marked online.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:54 +01:00
Pete Popov
bdf21b18b4 Philips PNX8550 support: MIPS32-like core with 2 Trimedias on it. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:54 +01:00
Ralf Baechle
e01402b115 More AP / SP bits for the 34K, the Malta bits and things. Still wants 
a little polishing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:53 +01:00
Ralf Baechle
7e35952baa Move Origin crapola into a machine-specific header file. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:52 +01:00
Ralf Baechle
a0c3a5b5a8 Prevent gcc from optimizing a few functions away completly. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:52 +01:00
Ralf Baechle
8f40611d2b Detect the MIPS R2 vectored interrupt, external interrupt controller 
options and the precense of the MT ASE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:51 +01:00
Ralf Baechle
55d04dff0f New kernel option nowait allows disabling the use of the wait instruction. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:48 +01:00
Ralf Baechle
569f75bd02 Use an irq_enable_hazard hazard barrier in unmask_mips_irq. This 
hasn't been an actual bug, so it's more a change to be 100% compliant
with the requirements of the architecture spec.  Similar fix to
mask_mips_irq where there was a slightly less theoretical chance of
getting hit.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:48 +01:00
Ralf Baechle
7db36c858c Add inotify syscalls for MIPS. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:47 +01:00
Ralf Baechle
ec74e361f1 Mark a few variables __read_mostly. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:46 +01:00
Ralf Baechle
bbc7f22f6d Detect the 34K. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:45 +01:00
Ralf Baechle
129bc8f78b Setup_frame is now returning a success value. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:41 +01:00
Ralf Baechle
b490ff4270 Temporary hack for Qemu and MIPSsim until they get a proper ELF loader. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:41 +01:00
Ralf Baechle
6e760c8dae Rename CONFIG_CPU_MIPS{32,64} to CONFIG_CPU_MIPS{32|64}_R1. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:37 +01:00
Ralf Baechle
c134a5ecdb Avoid defining variables in the middle of a block which breaks older 
compilers.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:33 +01:00
Maciej W. Rozycki
c4559f67b7 Always use ".set mips3" rather than select between "mips2" or "mips3" 
for assembling ll/sc sequences to avoid problems with 64-bit
configurations.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:31 +01:00
Maciej W. Rozycki
3b2396d972 Use correct names for bits in the R3k cp0.status register. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:29 +01:00
Maciej W. Rozycki
260c96738c Mark __die() "noreturn" for real. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:26 +01:00
Ralf Baechle
02416dcf5a Redo RM9000 workaround which along with other DSP ASE changes was 
causing some headache for debuggers knowing about signal frames.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:23 +01:00
Maciej W. Rozycki
aac8aa7717 Enable a suitable ISA for the assembler around ll/sc so that code 
builds even for processors that don't support the instructions.
Plus minor formatting fixes.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2005-10-29 19:31:22 +01:00