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Commit 54d46ea9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 

Pull signal handling cleanups from Al Viro:
 "sigaltstack infrastructure + conversion for x86, alpha and um,
  COMPAT_SYSCALL_DEFINE infrastructure.

  Note that there are several conflicts between "unify
  SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline;
  resolution is trivial - just remove definitions of SS_ONSTACK and
  SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and
  include/uapi/linux/signal.h contains the unified variant."

Fixed up conflicts as per Al.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  alpha: switch to generic sigaltstack
  new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those
  generic compat_sys_sigaltstack()
  introduce generic sys_sigaltstack(), switch x86 and um to it
  new helper: compat_user_stack_pointer()
  new helper: restore_altstack()
  unify SS_ONSTACK/SS_DISABLE definitions
  new helper: current_user_stack_pointer()
  missing user_stack_pointer() instances
  Bury the conditionals from kernel_thread/kernel_execve series
  COMPAT_SYSCALL_DEFINE: infrastructure
parents f59dc2bb 50ececcf

arch/Kconfig

+3 −6
Original line number Diff line number Diff line
@@ -291,12 +291,6 @@ config ARCH_WANT_OLD_COMPAT_IPC 
	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION

	bool



config GENERIC_KERNEL_THREAD

	bool



config GENERIC_KERNEL_EXECVE

	bool



config HAVE_ARCH_SECCOMP_FILTER

	bool

	help
@@ -362,6 +356,9 @@ config MODULES_USE_ELF_REL 
	  Modules only use ELF REL relocations.  Modules with ELF RELA

	  relocations will give an error.



config GENERIC_SIGALTSTACK

	bool



#

# ABI hall of shame

#

arch/alpha/Kconfig

+1 −2
Original line number Diff line number Diff line
@@ -20,10 +20,9 @@ config ALPHA 
	select GENERIC_CMOS_UPDATE

	select GENERIC_STRNCPY_FROM_USER

	select GENERIC_STRNLEN_USER

	select GENERIC_KERNEL_THREAD

	select GENERIC_KERNEL_EXECVE

	select HAVE_MOD_ARCH_SPECIFIC

	select MODULES_USE_ELF_RELA

	select GENERIC_SIGALTSTACK

	help

	  The Alpha is a 64-bit general-purpose processor designed and

	  marketed by the Digital Equipment Corporation of blessed memory,

arch/alpha/include/asm/ptrace.h

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#define user_mode(regs) (((regs)->ps & 8) != 0)

#define instruction_pointer(regs) ((regs)->pc)

#define profile_pc(regs) instruction_pointer(regs)

#define current_user_stack_pointer() rdusp()



#define task_pt_regs(task) \

  ((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)

arch/alpha/include/asm/unistd.h

+0 −1
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 
#define __ARCH_WANT_SYS_OLDUMOUNT

#define __ARCH_WANT_SYS_SIGPENDING

#define __ARCH_WANT_SYS_RT_SIGSUSPEND

#define __ARCH_WANT_SYS_EXECVE

#define __ARCH_WANT_SYS_FORK

#define __ARCH_WANT_SYS_VFORK

#define __ARCH_WANT_SYS_CLONE

arch/alpha/include/uapi/asm/signal.h

+0 −6
Original line number Diff line number Diff line
@@ -84,12 +84,6 @@ typedef unsigned long sigset_t; 
#define SA_ONESHOT	SA_RESETHAND

#define SA_NOMASK	SA_NODEFER



/* 

 * sigaltstack controls

 */

#define SS_ONSTACK	1

#define SS_DISABLE	2



#define MINSIGSTKSZ	4096

#define SIGSTKSZ	16384