linux-toradex.git/arch/arm/kernel/unwind.c, branch v3.0.63

ARM: 6468/1: backtrace: fix calculation of thread stack base

2010-11-07T16:12:37+00:00

When unwinding stack frames we must take care not to unwind
areas of memory that lie outside of the known extent of the stack.

This patch fixes an incorrect calculation of the stack base where
THREAD_SIZE is added to the stack pointer after it has already
been aligned to this value. Since the ALIGN macro performs this
addition internally, we end up overshooting the base by 8k.

Acked-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 6341/1: unwind - optimise linked-list searches for modules

2010-09-02T14:31:36+00:00

With several sections per module, and dozens of modules, the
searches down the linked list of sections would dominate the
lookup time, dwarfing any savings from the binary search
within the section.

A simple move-to-front optimisation exploits the commonality
of the code paths taken, and in simple real-world tests reduces
the number of steps in the search to barely more than 1.

Signed-off-by: Phil Carmody 
Acked-by: Catalin Marinas 
Signed-off-by: Russell King

ARM: 6140/1: silence a bogus sparse warning in unwind.c

2010-05-24T19:42:03+00:00

The check for compiler which is supposed to miscompile unwind tables
clearly has nothing to do with sparse (which does not define necessary
macros anyway), so simply silence it.

Signed-off-by: Alexander Shishkin 
Signed-off-by: Russell King

ARM: 5977/1: arm: Enable backtrace printing on oops when PC is corrupted

2010-03-07T10:22:00+00:00

If PC points outside kernel text, start printing the backtrace at LR
instead.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Russell King

ARM: 5776/1: Check compiler version and EABI support when adding ARM unwind support.

2009-11-02T16:59:45+00:00

ARM unwind is known to compile only with EABI and not-buggy compilers.
The problem is not the unwinding information but the -fno-frame-pointer
option added as a result of !CONFIG_FRAME_POINTER.  Now we check the
compiler and raise a #warning in case of wrong compiler.

Signed-off-by: Claudio Scordino 
Signed-off-by: Russell King

Thumb-2: Implementation of the unified start-up and exceptions code

2009-07-24T11:32:54+00:00

This patch implements the ARM/Thumb-2 unified kernel start-up and
exception handling code.

Signed-off-by: Catalin Marinas

[ARM] 5558/1: Add extra checks to ARM unwinder to avoid tracing corrupt stacks

2009-06-19T15:44:22+00:00

There are situations where the unwinder goes beyond stack boundaries and
unwinds random data. This patch moves the stack boundaries check after
the unwind_exec_insn() call and adds an extra check for possible
infinite loops (like "mov pc, lr" with pc == lr).

The patch also fixes a bug in the unwind instructions interpreter. The
0xb0 instruction can only set PC to LR if this wasn't already set by
a previous instruction (this is used on exceptions taken while in kernel
mode where svc_entry is annotated with ".save {r0 - pc}").

Tested-by: Tony Lindgren 

Signed-off-by: Catalin Marinas 
Signed-off-by: Russell King

[ARM] 5383/2: unwind: Add core support for ARM stack unwinding

2009-02-19T11:26:24+00:00

This patch adds the main functionality for parsing the stack unwinding
information generated by the ARM EABI toolchains. The unwinding
information consists of an index with a pair of words per function and a
table with unwinding instructions. For more information, see "Exception
Handling ABI for the ARM Architecture" at:

http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html

Signed-off-by: Catalin Marinas 
Signed-off-by: Russell King