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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-20 18:05:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-20 18:05:28 -0800 |
commit | 54d46ea993744c5408e39ce0cb4851e13cbea716 (patch) | |
tree | 8e38fa92cc2ae72e0353c44e1e68be9bf5a7a058 /arch/alpha | |
parent | f59dc2bb5a50b26ea751f9eac1c81e4cc7de5257 (diff) | |
parent | 50ececcfa7d1acee085b2c518cad495062db6379 (diff) | |
download | kernel_goldelico_gta04-54d46ea993744c5408e39ce0cb4851e13cbea716.zip kernel_goldelico_gta04-54d46ea993744c5408e39ce0cb4851e13cbea716.tar.gz kernel_goldelico_gta04-54d46ea993744c5408e39ce0cb4851e13cbea716.tar.bz2 |
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
Diffstat (limited to 'arch/alpha')
-rw-r--r-- | arch/alpha/Kconfig | 3 | ||||
-rw-r--r-- | arch/alpha/include/asm/ptrace.h | 1 | ||||
-rw-r--r-- | arch/alpha/include/asm/unistd.h | 1 | ||||
-rw-r--r-- | arch/alpha/include/uapi/asm/signal.h | 6 | ||||
-rw-r--r-- | arch/alpha/kernel/signal.c | 10 |
5 files changed, 3 insertions, 18 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 5dd7f5d..9d5904c 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -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, diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h index df9a6cd..2112850 100644 --- a/arch/alpha/include/asm/ptrace.h +++ b/arch/alpha/include/asm/ptrace.h @@ -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) diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h index d6069ff..b3396ee 100644 --- a/arch/alpha/include/asm/unistd.h +++ b/arch/alpha/include/asm/unistd.h @@ -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 diff --git a/arch/alpha/include/uapi/asm/signal.h b/arch/alpha/include/uapi/asm/signal.h index 965bbfa..dd4ca4bc 100644 --- a/arch/alpha/include/uapi/asm/signal.h +++ b/arch/alpha/include/uapi/asm/signal.h @@ -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 diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c index 336393c..02d02c0 100644 --- a/arch/alpha/kernel/signal.c +++ b/arch/alpha/kernel/signal.c @@ -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)); |