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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-21 06:05:28 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-21 06:05:28 +0400
commit54d46ea993744c5408e39ce0cb4851e13cbea716 (patch)
tree8e38fa92cc2ae72e0353c44e1e68be9bf5a7a058 /arch/x86/include/asm/ptrace.h
parentf59dc2bb5a50b26ea751f9eac1c81e4cc7de5257 (diff)
parent50ececcfa7d1acee085b2c518cad495062db6379 (diff)
downloadlinux-54d46ea993744c5408e39ce0cb4851e13cbea716.tar.xz
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/x86/include/asm/ptrace.h')
-rw-r--r--arch/x86/include/asm/ptrace.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 03ca442d8f0d..942a08623a1a 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -133,6 +133,13 @@ static inline bool user_64bit_mode(struct pt_regs *regs)
return regs->cs == __USER_CS || regs->cs == pv_info.extra_user_64bit_cs;
#endif
}
+
+#define current_user_stack_pointer() this_cpu_read(old_rsp)
+/* ia32 vs. x32 difference */
+#define compat_user_stack_pointer() \
+ (test_thread_flag(TIF_IA32) \
+ ? current_pt_regs()->sp \
+ : this_cpu_read(old_rsp))
#endif
#ifdef CONFIG_X86_32