x86, um: ... and asm-x86 move

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 262 insertions, 0 deletions

diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
new file mode 100644
index 000000000000..65acc82d267a
--- /dev/null
+++ b/arch/x86/include/asm/signal.h
@@ -0,0 +1,262 @@
+#ifndef ASM_X86__SIGNAL_H
+#define ASM_X86__SIGNAL_H
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/compiler.h>
+
+/* Avoid too many header ordering problems.  */
+struct siginfo;
+
+#ifdef __KERNEL__
+#include <linux/linkage.h>
+
+/* Most things should be clean enough to redefine this at will, if care
+   is taken to make libc match.  */
+
+#define _NSIG           64
+
+#ifdef __i386__
+# define _NSIG_BPW      32
+#else
+# define _NSIG_BPW      64
+#endif
+
+#define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
+
+typedef unsigned long old_sigset_t;             /* at least 32 bits */
+
+typedef struct {
+        unsigned long sig[_NSIG_WORDS];
+} sigset_t;
+
+#else
+/* Here we must cater to libcs that poke about in kernel headers.  */
+
+#define NSIG            32
+typedef unsigned long sigset_t;
+
+#endif /* __KERNEL__ */
+#endif /* __ASSEMBLY__ */
+
+#define SIGHUP           1
+#define SIGINT           2
+#define SIGQUIT          3
+#define SIGILL           4
+#define SIGTRAP          5
+#define SIGABRT          6
+#define SIGIOT           6
+#define SIGBUS           7
+#define SIGFPE           8
+#define SIGKILL          9
+#define SIGUSR1         10
+#define SIGSEGV         11
+#define SIGUSR2         12
+#define SIGPIPE         13
+#define SIGALRM         14
+#define SIGTERM         15
+#define SIGSTKFLT       16
+#define SIGCHLD         17
+#define SIGCONT         18
+#define SIGSTOP         19
+#define SIGTSTP         20
+#define SIGTTIN         21
+#define SIGTTOU         22
+#define SIGURG          23
+#define SIGXCPU         24
+#define SIGXFSZ         25
+#define SIGVTALRM       26
+#define SIGPROF         27
+#define SIGWINCH        28
+#define SIGIO           29
+#define SIGPOLL         SIGIO
+/*
+#define SIGLOST         29
+*/
+#define SIGPWR          30
+#define SIGSYS          31
+#define SIGUNUSED       31
+
+/* These should not be considered constants from userland.  */
+#define SIGRTMIN        32
+#define SIGRTMAX        _NSIG
+
+/*
+ * SA_FLAGS values:
+ *
+ * SA_ONSTACK indicates that a registered stack_t will be used.
+ * SA_RESTART flag to get restarting signals (which were the default long ago)
+ * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
+ * SA_RESETHAND clears the handler when the signal is delivered.
+ * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
+ * SA_NODEFER prevents the current signal from being masked in the handler.
+ *
+ * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
+ * Unix names RESETHAND and NODEFER respectively.
+ */
+#define SA_NOCLDSTOP    0x00000001u
+#define SA_NOCLDWAIT    0x00000002u
+#define SA_SIGINFO      0x00000004u
+#define SA_ONSTACK      0x08000000u
+#define SA_RESTART      0x10000000u
+#define SA_NODEFER      0x40000000u
+#define SA_RESETHAND    0x80000000u
+
+#define SA_NOMASK       SA_NODEFER
+#define SA_ONESHOT      SA_RESETHAND
+
+#define SA_RESTORER     0x04000000
+
+/*
+ * sigaltstack controls
+ */
+#define SS_ONSTACK      1
+#define SS_DISABLE      2
+
+#define MINSIGSTKSZ     2048
+#define SIGSTKSZ        8192
+
+#include <asm-generic/signal.h>
+
+#ifndef __ASSEMBLY__
+
+#ifdef __i386__
+# ifdef __KERNEL__
+struct old_sigaction {
+        __sighandler_t sa_handler;
+        old_sigset_t sa_mask;
+        unsigned long sa_flags;
+        __sigrestore_t sa_restorer;
+};
+
+struct sigaction {
+        __sighandler_t sa_handler;
+        unsigned long sa_flags;
+        __sigrestore_t sa_restorer;
+        sigset_t sa_mask;               /* mask last for extensibility */
+};
+
+struct k_sigaction {
+        struct sigaction sa;
+};
+
+extern void do_notify_resume(struct pt_regs *, void *, __u32);
+
+# else /* __KERNEL__ */
+/* Here we must cater to libcs that poke about in kernel headers.  */
+
+struct sigaction {
+        union {
+          __sighandler_t _sa_handler;
+          void (*_sa_sigaction)(int, struct siginfo *, void *);
+        } _u;
+        sigset_t sa_mask;
+        unsigned long sa_flags;
+        void (*sa_restorer)(void);
+};
+
+#define sa_handler      _u._sa_handler
+#define sa_sigaction    _u._sa_sigaction
+
+# endif /* ! __KERNEL__ */
+#else /* __i386__ */
+
+struct sigaction {
+        __sighandler_t sa_handler;
+        unsigned long sa_flags;
+        __sigrestore_t sa_restorer;
+        sigset_t sa_mask;               /* mask last for extensibility */
+};
+
+struct k_sigaction {
+        struct sigaction sa;
+};
+
+#endif /* !__i386__ */
+
+typedef struct sigaltstack {
+        void __user *ss_sp;
+        int ss_flags;
+        size_t ss_size;
+} stack_t;
+
+#ifdef __KERNEL__
+#include <asm/sigcontext.h>
+
+#ifdef __i386__
+
+#define __HAVE_ARCH_SIG_BITOPS
+
+#define sigaddset(set,sig)                  \
+        (__builtin_constant_p(sig)          \
+         ? __const_sigaddset((set), (sig))  \
+         : __gen_sigaddset((set), (sig)))
+
+static inline void __gen_sigaddset(sigset_t *set, int _sig)
+{
+        asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
+}
+
+static inline void __const_sigaddset(sigset_t *set, int _sig)
+{
+        unsigned long sig = _sig - 1;
+        set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
+}
+
+#define sigdelset(set, sig)                 \
+        (__builtin_constant_p(sig)          \
+         ? __const_sigdelset((set), (sig))  \
+         : __gen_sigdelset((set), (sig)))
+
+
+static inline void __gen_sigdelset(sigset_t *set, int _sig)
+{
+        asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
+}
+
+static inline void __const_sigdelset(sigset_t *set, int _sig)
+{
+        unsigned long sig = _sig - 1;
+        set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
+}
+
+static inline int __const_sigismember(sigset_t *set, int _sig)
+{
+        unsigned long sig = _sig - 1;
+        return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
+}
+
+static inline int __gen_sigismember(sigset_t *set, int _sig)
+{
+        int ret;
+        asm("btl %2,%1\n\tsbbl %0,%0"
+            : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
+        return ret;
+}
+
+#define sigismember(set, sig)                   \
+        (__builtin_constant_p(sig)              \
+         ? __const_sigismember((set), (sig))    \
+         : __gen_sigismember((set), (sig)))
+
+static inline int sigfindinword(unsigned long word)
+{
+        asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
+        return word;
+}
+
+struct pt_regs;
+
+#else /* __i386__ */
+
+#undef __HAVE_ARCH_SIG_BITOPS
+
+#endif /* !__i386__ */
+
+#define ptrace_signal_deliver(regs, cookie) do { } while (0)
+
+#endif /* __KERNEL__ */
+#endif /* __ASSEMBLY__ */
+
+#endif /* ASM_X86__SIGNAL_H */