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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 18:05:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 18:05:28 -0800
commit54d46ea993744c5408e39ce0cb4851e13cbea716 (patch)
tree8e38fa92cc2ae72e0353c44e1e68be9bf5a7a058 /arch/alpha
parentf59dc2bb5a50b26ea751f9eac1c81e4cc7de5257 (diff)
parent50ececcfa7d1acee085b2c518cad495062db6379 (diff)
downloadlinux-54d46ea993744c5408e39ce0cb4851e13cbea716.tar.gz
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/Kconfig3
-rw-r--r--arch/alpha/include/asm/ptrace.h1
-rw-r--r--arch/alpha/include/asm/unistd.h1
-rw-r--r--arch/alpha/include/uapi/asm/signal.h6
-rw-r--r--arch/alpha/kernel/signal.c10
5 files changed, 3 insertions, 18 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 5dd7f5db24d..9d5904cc771 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 df9a6cd748d..21128505ddb 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 d6069ff3b1c..b3396ee039b 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 965bbfa59c6..dd4ca4bcbb4 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 336393c9c11..02d02c047f1 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));