linux-toradex.git/include/linux/elf.h, branch v2.6.35-rc6

[S390] add breaking event address for user space

2010-05-17T08:00:15+00:00

Copy the last breaking event address from the lowcore to a new
field in the thread_struct on each system entry. Add a new
ptrace request PTRACE_GET_LAST_BREAK and a new utrace regset
REGSET_LAST_BREAK to query the last breaking event.

This is useful for debugging wild branches in user space code.

Signed-off-by: Martin Schwidefsky

elf coredump: add extended numbering support

2010-03-06T19:26:46+00:00

The current ELF dumper implementation can produce broken corefiles if
program headers exceed 65535.  This number is determined by the number of
vmas which the process have.  In particular, some extreme programs may use
more than 65535 vmas.  (If you google max_map_count, you can find some
users facing this problem.) This kind of program never be able to generate
correct coredumps.

This patch implements ``extended numbering'' that uses sh_info field of
the first section header instead of e_phnum field in order to represent
upto 4294967295 vmas.

This is supported by
AMD64-ABI(http://www.x86-64.org/documentation.html) and
Solaris(http://docs.sun.com/app/docs/doc/817-1984/).
Of course, we are preparing patches for gdb and binutils.

Signed-off-by: Daisuke HATAYAMA 
Cc: "Luck, Tony" 
Cc: Jeff Dike 
Cc: David Howells 
Cc: Greg Ungerer 
Cc: Roland McGrath 
Cc: Oleg Nesterov 
Cc: Ingo Molnar 
Cc: Alexander Viro 
Cc: Andi Kleen 
Cc: Alan Cox 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

elf coredump: replace ELF_CORE_EXTRA_* macros by functions

2010-03-06T19:26:45+00:00

elf_core_dump() and elf_fdpic_core_dump() use #ifdef and the corresponding
macro for hiding _multiline_ logics in functions.  This patch removes
#ifdef and replaces ELF_CORE_EXTRA_* by corresponding functions.  For
architectures not implemeonting ELF_CORE_EXTRA_*, we use weak functions in
order to reduce a range of modification.

This cleanup is for my next patches, but I think this cleanup itself is
worth doing regardless of my firnal purpose.

Signed-off-by: Daisuke HATAYAMA 
Cc: "Luck, Tony" 
Cc: Jeff Dike 
Cc: David Howells 
Cc: Greg Ungerer 
Cc: Roland McGrath 
Cc: Oleg Nesterov 
Cc: Ingo Molnar 
Cc: Alexander Viro 
Cc: Andi Kleen 
Cc: Alan Cox 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'x86-ptrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-02-28T18:59:44+00:00

* 'x86-ptrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, ptrace: Remove set_stopped_child_used_math() in [x]fpregs_set
  x86, ptrace: Simplify xstateregs_get()
  ptrace: Fix ptrace_regset() comments and diagnose errors specifically
  parisc: Disable CONFIG_HAVE_ARCH_TRACEHOOK
  ptrace: Add support for generic PTRACE_GETREGSET/PTRACE_SETREGSET
  x86, ptrace: regset extensions to support xstate

[S390] Define new s390 ELF note sections in elf.h

2010-02-26T21:37:33+00:00

S390 ELF core dump currently only contains the PSW, the general purpose
registers, the floating point registers and the access registers stored
in PRSTATUS/PRFPREG note sections.
For analyzing s390 kernel problems additional registers are important.
In order to be able to include these registers to a kernel ELF core dump,
this patch adds the following five new note sections to elf.h:

* NT_S390_TIMER:   S390 timer register
* NT_S390_TODCMP:  S390 TOD comparator register
* NT_S390_TODPREG: S390 TOD programmable register
* NT_S390_CTRS:    S390 control registers
* NT_S390_PREFIX:  S390 prefix register

The new note sections have been already defined and accepted in the upstream
binutils package.

Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky

ptrace: Add support for generic PTRACE_GETREGSET/PTRACE_SETREGSET

2010-02-11T23:08:33+00:00

Generic support for PTRACE_GETREGSET/PTRACE_SETREGSET commands which
export the regsets supported by each architecture using the correponding
NT_* types. These NT_* types are already part of the userland ABI, used
in representing the architecture specific register sets as different NOTES
in an ELF core file.

'addr' parameter for the ptrace system call encode the REGSET type (using
the corresppnding NT_* type) and the 'data' parameter points to the
struct iovec having the user buffer and the length of that buffer.

	struct iovec iov = { buf, len};
	ret = ptrace(PTRACE_GETREGSET/PTRACE_SETREGSET, pid, NT_XXX_TYPE, &iov);

On successful completion, iov.len will be updated by the kernel specifying
how much the kernel has written/read to/from the user's iov.buf.

x86 extended state registers are primarily exported using this interface.

Signed-off-by: Suresh Siddha 
LKML-Reference: <20100211195614.886724710@sbs-t61.sc.intel.com>
Acked-by: Hongjiu Lu 
Cc: Roland McGrath 
Signed-off-by: H. Peter Anvin

x86, ptrace: regset extensions to support xstate

2010-02-11T23:08:17+00:00

Add the xstate regset support which helps extend the kernel ptrace and the
core-dump interfaces to support AVX state etc.

This regset interface is designed to support all the future state that gets
supported using xsave/xrstor infrastructure.

Looking at the memory layout saved by "xsave", one can't say which state
is represented in the memory layout. This is because if a particular state is
in init state, in the xsave hdr it can be represented by bit '0'. And hence
we can't really say by the xsave header wether a state is in init state or
the state is not saved in the memory layout.

And hence the xsave memory layout available through this regset
interface uses SW usable bytes [464..511] to convey what state is represented
in the memory layout.

First 8 bytes of the sw_usable_bytes[464..467] will be set to OS enabled xstate
mask(which is same as the 64bit mask returned by the xgetbv's xCR0).

The note NT_X86_XSTATE represents the extended state information in the
core file, using the above mentioned memory layout.

Signed-off-by: Suresh Siddha 
LKML-Reference: <20100211195614.802495327@sbs-t61.sc.intel.com>
Signed-off-by: Hongjiu Lu 
Cc: Roland McGrath 
Signed-off-by: H. Peter Anvin

[S390] rename NT_PRXSTATUS to NT_S390_HIGHREGS

2009-12-18T16:43:32+00:00

The elf notes number for the upper register halves is s390 specific.
Change the name of the elf notes to include S390.

Signed-off-by: Martin Schwidefsky 
Signed-off-by: Martin Schwidefsky

[S390] 64-bit register support for 31-bit processes

2009-10-06T08:35:10+00:00

From: Heiko Carstens 
From: Martin Schwidefsky 

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

headers_check fix: linux/elf.h

2009-01-30T18:18:33+00:00

fix the following 'make headers_check' warnings:

  usr/include/linux/elf.h:379: extern's make no sense in userspace
  usr/include/linux/elf.h:387: extern's make no sense in userspace
  usr/include/linux/elf.h:401: extern's make no sense in userspace
  usr/include/linux/elf.h:402: extern's make no sense in userspace

Signed-off-by: Jaswinder Singh Rajput