Commits · 6bf9adfc90370b695cb111116e15fdc0e1906270 · Kirill Smelkov / linux

19 Dec, 2012 8 commits

introduce generic sys_sigaltstack(), switch x86 and um to it · 6bf9adfc

Al Viro authored Dec 14, 2012

Conditional on CONFIG_GENERIC_SIGALTSTACK; architectures that do not
select it are completely unaffected
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

6bf9adfc

new helper: compat_user_stack_pointer() · 9b064fc3

Al Viro authored Dec 14, 2012

Compat counterpart of current_user_stack_pointer(); for most of the biarch
architectures those two are identical, but e.g. arm64 and arm use different
registers for stack pointer...

Note that amd64 variants of current_user_stack_pointer/compat_user_stack_pointer
do *not* rely on pt_regs having been through FIXUP_TOP_OF_STACK.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

9b064fc3

new helper: restore_altstack() · 5c49574f

Al Viro authored Nov 18, 2012

to be used by rt_sigreturn instances
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

5c49574f

unify SS_ONSTACK/SS_DISABLE definitions · 031b6566
Al Viro authored Nov 18, 2012
```
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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031b6566

new helper: current_user_stack_pointer() · 1ca97bb5

Al Viro authored Nov 18, 2012

	Cross-architecture equivalent of rdusp(); default is
user_stack_pointer(current_pt_regs()) - that works for almost all
platforms that have usp saved in pt_regs.  The only exception from
that is ia64 - we want memory stack, not the backing store for
register one.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1ca97bb5

missing user_stack_pointer() instances · 5208ba24

Al Viro authored Dec 14, 2012

for the architectures that have usp in pt_regs and do not have
user_stack_pointer() already defined.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

5208ba24

Bury the conditionals from kernel_thread/kernel_execve series · ae903caa

Al Viro authored Dec 14, 2012

All architectures have
	CONFIG_GENERIC_KERNEL_THREAD
	CONFIG_GENERIC_KERNEL_EXECVE
	__ARCH_WANT_SYS_EXECVE
None of them have __ARCH_WANT_KERNEL_EXECVE and there are only two callers
of kernel_execve() (which is a trivial wrapper for do_execve() now) left.
Kill the conditionals and make both callers use do_execve().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ae903caa

COMPAT_SYSCALL_DEFINE: infrastructure · 46836613
Al Viro authored Nov 23, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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46836613

29 Nov, 2012 32 commits
- do_coredump(): get rid of pt_regs argument · 541880d9
  Al Viro authored Nov 05, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  541880d9
- print_fatal_signal(): get rid of pt_regs argument · 4aaefee5
  Al Viro authored Nov 05, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  4aaefee5
- ptrace_signal(): get rid of unused arguments · 94eb22d5
  Al Viro authored Nov 05, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  94eb22d5
- get rid of ptrace_signal_deliver() arguments · b7f9591c
  Al Viro authored Nov 05, 2012
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the first one is equal to signal_pt_regs(), the second is never used
(and always NULL, while we are at it).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  b7f9591c
- new helper: signal_pt_regs() · 22062a96
  Al Viro authored Nov 05, 2012
```
Always equal to task_pt_regs(current); defined only when we are in
signal delivery.  It may be different from current_pt_regs() - e.g.
architectures like m68k may have pt_regs location on exception
different from that on a syscall and signals (just as ptrace handling)
may happen on exceptions as well as on syscalls.

When they are equal, it's often better to have signal_pt_regs
defined (in asm/ptrace.h) as current_pt_regs - that tends to be
optimized better than default would be.  However, optimisation is
the only reason why we might want an arch-specific definition;
if current_pt_regs() and task_pt_regs(current) have different
values, the latter one is right.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
```
  22062a96
- unify default ptrace_signal_deliver · 4f4202fe
  Al Viro authored Nov 05, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  4f4202fe
- flagday: kill pt_regs argument of do_fork() · e80d6661
  Al Viro authored Oct 22, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  e80d6661
- death to idle_regs() · 18c26c27
  Al Viro authored Oct 22, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  18c26c27
- don't pass regs to copy_process() · 62e791c1
  Al Viro authored Oct 22, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  62e791c1
- flagday: don't pass regs to copy_thread() · afa86fc4
  Al Viro authored Oct 22, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  afa86fc4
- bfin: switch to generic vfork, get rid of pointless wrappers · 135c37b8
  Al Viro authored Nov 13, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  135c37b8
- xtensa: switch to generic clone() · 3e41f9ba
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  3e41f9ba
- openrisc: switch to use of generic fork and clone · 39d91a9e
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  39d91a9e
- unicore32: switch to generic clone(2) · cb562173
  Al Viro authored Oct 22, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  cb562173
- score: switch to generic fork/vfork/clone · eda96977
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  eda96977
- c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone() · 951b3961
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  951b3961
- take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h · 24465a40
  Al Viro authored Nov 28, 2012
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now it can be done...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  24465a40
- mn10300: switch to generic fork/vfork/clone · 1ea2a016
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  1ea2a016
- h8300: switch to generic fork/vfork/clone · 3416e809
  Al Viro authored Oct 27, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  3416e809
- tile: switch to generic clone() · e9eac304
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  e9eac304
- m68k: sanitize copy_thread(), fork/vfork/clone wrappers, switch to generic fork/vfork · 20ecc91c
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  20ecc91c
- alpha: switch to generic fork/vfork/clone · dfe09ae0
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  dfe09ae0
- s390: switch to generic fork/vfork/clone · 87f1ca8f
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  87f1ca8f
- microblaze: switch to generic fork/vfork/clone · f3268edb
  Al Viro authored Oct 27, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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  f3268edb
- hexagon: switch to generic clone() · f01aceac
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  f01aceac
- sh: switch to generic fork/vfork/clone · 0ad9513d
  Al Viro authored Oct 27, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  0ad9513d
- parisc: switch to generic fork/vfork/clone · 415bfae9
  Al Viro authored Oct 26, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  415bfae9
- m32r: switch to generic fork/vfork/clone · 92bbe6cd
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  92bbe6cd
- cris: switch to generic fork/vfork/clone · 27d892fb
  Al Viro authored Oct 26, 2012
```
same braindamage as on s390 - the first two arguments of clone(2) in the
wrong order.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  27d892fb
- avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappers · 584271bc
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  584271bc
- arm64: sanitize copy_thread(), switch to generic fork/vfork/clone · 9ac08002
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  9ac08002
- frv: switch to generic fork/vfork/clone · b9763ce3
  Al Viro authored Oct 21, 2012
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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  b9763ce3