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

Browse Source 
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
This commit is contained in:
Linus Torvalds
2012-12-20 18:05:28 -08:00
parent f59dc2bb5a 50ececcfa7
commit 54d46ea993
118 changed files with 211 additions and 357 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/Kconfig
+3 -6
View File
@@ -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
View File
@@ -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
View File
@@ -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
-1
View File
@@ -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
-6
View File
@@ -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
arch/alpha/kernel/signal.c
+1 -9
View File
@@ -122,12 +122,6 @@ SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
return sigsuspend(&blocked);
}
asmlinkage int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
/*
* Do a signal return; undo the signal stack.
*/
@@ -418,9 +412,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
err |= __put_user(set->sig[0], &frame->uc.uc_osf_sigmask);
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(oldsp), &frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, oldsp);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs,
set->sig[0], oldsp);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
arch/arm/Kconfig
-2
View File
@@ -12,8 +12,6 @@ config ARM
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
select GENERIC_PCI_IOMAP
select GENERIC_SMP_IDLE_THREAD
select GENERIC_STRNCPY_FROM_USER
arch/arm/include/asm/unistd.h
-1
View File
@@ -41,7 +41,6 @@
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_SYS_SOCKETCALL
#endif
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE
arch/arm/include/uapi/asm/signal.h
-7
View File
@@ -87,13 +87,6 @@ typedef unsigned long sigset_t;
#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND
/*
* sigaltstack controls
*/
#define SS_ONSTACK 1
#define SS_DISABLE 2
#define MINSIGSTKSZ 2048
#define SIGSTKSZ 8192
arch/arm64/Kconfig
-2
View File
@@ -8,8 +8,6 @@ config ARM64
select GENERIC_IOMAP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_KERNEL_EXECVE
select GENERIC_KERNEL_THREAD
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select HARDIRQS_SW_RESEND
arch/arm64/include/asm/compat.h
+3 -2
View File
@@ -209,10 +209,11 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
#define compat_user_stack_pointer() (current_pt_regs()->compat_sp)
static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = task_pt_regs(current);
return (void __user *)regs->compat_sp - len;
return (void __user *)compat_user_stack_pointer() - len;
}
struct compat_ipc64_perm {
arch/arm64/include/asm/unistd.h
-1
View File
@@ -28,6 +28,5 @@
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#endif
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_CLONE
#include <uapi/asm/unistd.h>
arch/avr32/Kconfig
-2
View File
@@ -17,8 +17,6 @@ config AVR32
select GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
arch/avr32/include/asm/ptrace.h
+1
View File
@@ -21,6 +21,7 @@
#define user_mode(regs) (((regs)->sr & MODE_MASK) == MODE_USER)
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
#define user_stack_pointer(regs) ((regs)->sp)
static __inline__ int valid_user_regs(struct pt_regs *regs)
{
arch/avr32/include/asm/unistd.h
-1
View File
@@ -39,7 +39,6 @@
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_RT_SIGACTION
#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/avr32/include/uapi/asm/signal.h
-6
View File
@@ -89,12 +89,6 @@ typedef unsigned long sigset_t;
#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND
/*
* sigaltstack controls
*/
#define SS_ONSTACK 1
#define SS_DISABLE 2
#define MINSIGSTKSZ 2048
#define SIGSTKSZ 8192
arch/blackfin/Kconfig
-2
View File
@@ -45,8 +45,6 @@ config BLACKFIN
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
config GENERIC_CSUM
def_bool y
arch/blackfin/include/asm/ptrace.h
+1
View File
@@ -17,6 +17,7 @@
#define arch_has_single_step() (1)
/* common code demands this function */
#define ptrace_disable(child) user_disable_single_step(child)
#define current_user_stack_pointer() rdusp()
extern int is_user_addr_valid(struct task_struct *child,
unsigned long start, unsigned long len);
arch/blackfin/include/asm/unistd.h
-1
View File
@@ -20,7 +20,6 @@
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_VFORK
/*
arch/c6x/Kconfig
-2
View File
@@ -17,8 +17,6 @@ config C6X
select OF
select OF_EARLY_FLATTREE
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
select MODULES_USE_ELF_RELA
config MMU

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