linux-stable.git/arch/arm64/kernel/sys_compat.c, branch linux-4.3.y

arm64: compat: align cacheflush syscall with arch/arm

2014-12-01T13:31:12+00:00

Update handling of cacheflush syscall with changes made in arch/arm
counterpart:
 - return error to userspace when flushing syscall fails
 - split user cache-flushing into interruptible chunks
 - don't bother rounding to nearest vma

Signed-off-by: Vladimir Murzin 
[will: changed internal return value from -EINTR to 0 to match arch/arm/]
Signed-off-by: Will Deacon

arm64: flush TLS registers during exec

2014-09-11T17:34:58+00:00

Nathan reports that we leak TLS information from the parent context
during an exec, as we don't clear the TLS registers when flushing the
thread state.

This patch updates the flushing code so that we:

  (1) Unconditionally zero the tpidr_el0 register (since this is fully
      context switched for native tasks and zeroed for compat tasks)

  (2) Zero the tp_value state in thread_info before clearing the
      tpidrr0_el0 register for compat tasks (since this is only writable
      by the set_tls compat syscall and therefore not fully switched).

A missing compiler barrier is also added to the compat set_tls syscall.

Cc: 
Acked-by: Nathan Lynch 
Reported-by: Nathan Lynch 
Signed-off-by: Will Deacon

arm64: Add __NR_* definitions for compat syscalls

2014-07-10T10:02:40+00:00

This patch adds __NR_* definitions to asm/unistd32.h, moves the
__NR_compat_* definitions to asm/unistd.h and removes all the explicit
unistd32.h includes apart from the one building the compat syscall
table. The aim is to have the compat __NR_* definitions available but
without colliding with the native syscall definitions (required by
lib/compat_audit.c to avoid duplicating the audit header files between
native and compat).

Signed-off-by: Catalin Marinas

compat: generic compat_sys_sched_rr_get_interval() implementation

2012-12-18T01:15:18+00:00

This function is used by sparc, powerpc tile and arm64 for compat support.
 The patch adds a generic implementation with a wrapper for PowerPC to do
the u32->int sign extension.

The reason for a single patch covering powerpc, tile, sparc and arm64 is
to keep it bisectable, otherwise kernel building may fail with mismatched
function declarations.

Signed-off-by: Catalin Marinas 
Acked-by: Chris Metcalf   [for tile]
Acked-by: David S. Miller 
Acked-by: Arnd Bergmann 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Alexander Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arm64: sanitize copy_thread(), switch to generic fork/vfork/clone

2012-11-29T03:36:33+00:00

Signed-off-by: Al Viro

arm64: get rid of fork/vfork/clone wrappers

2012-10-22T22:14:17+00:00

[fixes from Catalin Marinas folded]

Acked-by: Catalin Marinas 
Tested-by: Catalin Marinas 
Signed-off-by: Al Viro

arm64: Use generic sys_execve() implementation

2012-10-17T13:41:51+00:00

This patch converts the arm64 port to use the generic sys_execve()
implementation removing the arm64-specific (compat_)sys_execve_wrapper()
functions.

Signed-off-by: Catalin Marinas

Merge tag 'arm64-uapi' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

2012-10-13T02:20:04+00:00

Pull arm64 uapi disintegration from Catalin Marinas:
 "UAPI headers for arm64 together with some clean-up to make it
  possible:
   - Do not export the COMPAT_* definitions to user
   - Simplify the compat unistd32.h definitions and remove the
     __SYSCALL_COMPAT guard
   - Disintegrate the arch/arm64/include/asm/* headers"

* tag 'arm64-uapi' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  UAPI: (Scripted) Disintegrate arch/arm64/include/asm
  arm64: Do not export the compat-specific definitions to the user
  arm64: Do not include asm/unistd32.h in asm/unistd.h
  arm64: Remove unused definitions from asm/unistd32.h

vfs: define struct filename and have getname() return it

2012-10-13T00:14:55+00:00

getname() is intended to copy pathname strings from userspace into a
kernel buffer. The result is just a string in kernel space. It would
however be quite helpful to be able to attach some ancillary info to
the string.

For instance, we could attach some audit-related info to reduce the
amount of audit-related processing needed. When auditing is enabled,
we could also call getname() on the string more than once and not
need to recopy it from userspace.

This patchset converts the getname()/putname() interfaces to return
a struct instead of a string. For now, the struct just tracks the
string in kernel space and the original userland pointer for it.

Later, we'll add other information to the struct as it becomes
convenient.

Signed-off-by: Jeff Layton 
Signed-off-by: Al Viro

arm64: Do not include asm/unistd32.h in asm/unistd.h

2012-10-11T09:39:08+00:00

This patch only includes asm/unistd32.h where necessary and removes its
inclusion in the asm/unistd.h file. The __SYSCALL_COMPAT guard is
dropped.

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