diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/siginfo.h | 2 | ||||
| -rw-r--r-- | include/asm-parisc/siginfo.h | 5 | ||||
| -rw-r--r-- | include/asm-x86/ptrace.h | 6 | ||||
| -rw-r--r-- | include/asm-x86/spinlock.h | 60 | ||||
| -rw-r--r-- | include/asm-x86/traps.h | 12 |
5 files changed, 42 insertions, 43 deletions
diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h index 8786e01e0db..969570167e9 100644 --- a/include/asm-generic/siginfo.h +++ b/include/asm-generic/siginfo.h @@ -199,6 +199,8 @@ typedef struct siginfo { */ #define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */ #define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */ +#define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */ +#define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */ #define NSIGTRAP 2 /* diff --git a/include/asm-parisc/siginfo.h b/include/asm-parisc/siginfo.h index d4909f55fe3..d7034728f37 100644 --- a/include/asm-parisc/siginfo.h +++ b/include/asm-parisc/siginfo.h @@ -3,11 +3,6 @@ #include <asm-generic/siginfo.h> -/* - * SIGTRAP si_codes - */ -#define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */ -#define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint or watchpoint */ #undef NSIGTRAP #define NSIGTRAP 4 diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h index d64a6109716..ac578f11c1c 100644 --- a/include/asm-x86/ptrace.h +++ b/include/asm-x86/ptrace.h @@ -177,11 +177,11 @@ convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs); #ifdef CONFIG_X86_32 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, - int error_code); -#else -void signal_fault(struct pt_regs *regs, void __user *frame, char *where); + int error_code, int si_code); #endif +void signal_fault(struct pt_regs *regs, void __user *frame, char *where); + extern long syscall_trace_enter(struct pt_regs *); extern void syscall_trace_leave(struct pt_regs *); diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h index 8badab09146..157ff7fab97 100644 --- a/include/asm-x86/spinlock.h +++ b/include/asm-x86/spinlock.h @@ -21,8 +21,10 @@ #ifdef CONFIG_X86_32 # define LOCK_PTR_REG "a" +# define REG_PTR_MODE "k" #else # define LOCK_PTR_REG "D" +# define REG_PTR_MODE "q" #endif #if defined(CONFIG_X86_32) && \ @@ -54,19 +56,7 @@ * much between them in performance though, especially as locks are out of line. */ #if (NR_CPUS < 256) -static inline int __ticket_spin_is_locked(raw_spinlock_t *lock) -{ - int tmp = ACCESS_ONCE(lock->slock); - - return (((tmp >> 8) & 0xff) != (tmp & 0xff)); -} - -static inline int __ticket_spin_is_contended(raw_spinlock_t *lock) -{ - int tmp = ACCESS_ONCE(lock->slock); - - return (((tmp >> 8) - tmp) & 0xff) > 1; -} +#define TICKET_SHIFT 8 static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock) { @@ -89,19 +79,17 @@ static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock) static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock) { - int tmp; - short new; + int tmp, new; - asm volatile("movw %2,%w0\n\t" + asm volatile("movzwl %2, %0\n\t" "cmpb %h0,%b0\n\t" + "leal 0x100(%" REG_PTR_MODE "0), %1\n\t" "jne 1f\n\t" - "movw %w0,%w1\n\t" - "incb %h1\n\t" LOCK_PREFIX "cmpxchgw %w1,%2\n\t" "1:" "sete %b1\n\t" "movzbl %b1,%0\n\t" - : "=&a" (tmp), "=Q" (new), "+m" (lock->slock) + : "=&a" (tmp), "=&q" (new), "+m" (lock->slock) : : "memory", "cc"); @@ -116,19 +104,7 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock) : "memory", "cc"); } #else -static inline int __ticket_spin_is_locked(raw_spinlock_t *lock) -{ - int tmp = ACCESS_ONCE(lock->slock); - - return (((tmp >> 16) & 0xffff) != (tmp & 0xffff)); -} - -static inline int __ticket_spin_is_contended(raw_spinlock_t *lock) -{ - int tmp = ACCESS_ONCE(lock->slock); - - return (((tmp >> 16) - tmp) & 0xffff) > 1; -} +#define TICKET_SHIFT 16 static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock) { @@ -146,7 +122,7 @@ static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock) /* don't need lfence here, because loads are in-order */ "jmp 1b\n" "2:" - : "+Q" (inc), "+m" (lock->slock), "=r" (tmp) + : "+r" (inc), "+m" (lock->slock), "=&r" (tmp) : : "memory", "cc"); } @@ -160,13 +136,13 @@ static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock) "movl %0,%1\n\t" "roll $16, %0\n\t" "cmpl %0,%1\n\t" + "leal 0x00010000(%" REG_PTR_MODE "0), %1\n\t" "jne 1f\n\t" - "addl $0x00010000, %1\n\t" LOCK_PREFIX "cmpxchgl %1,%2\n\t" "1:" "sete %b1\n\t" "movzbl %b1,%0\n\t" - : "=&a" (tmp), "=r" (new), "+m" (lock->slock) + : "=&a" (tmp), "=&q" (new), "+m" (lock->slock) : : "memory", "cc"); @@ -182,6 +158,20 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock) } #endif +static inline int __ticket_spin_is_locked(raw_spinlock_t *lock) +{ + int tmp = ACCESS_ONCE(lock->slock); + + return !!(((tmp >> TICKET_SHIFT) ^ tmp) & ((1 << TICKET_SHIFT) - 1)); +} + +static inline int __ticket_spin_is_contended(raw_spinlock_t *lock) +{ + int tmp = ACCESS_ONCE(lock->slock); + + return (((tmp >> TICKET_SHIFT) - tmp) & ((1 << TICKET_SHIFT) - 1)) > 1; +} + #ifdef CONFIG_PARAVIRT /* * Define virtualization-friendly old-style lock byte lock, for use in diff --git a/include/asm-x86/traps.h b/include/asm-x86/traps.h index 2ccebc6fb0b..7a692baa51a 100644 --- a/include/asm-x86/traps.h +++ b/include/asm-x86/traps.h @@ -1,6 +1,8 @@ #ifndef ASM_X86__TRAPS_H #define ASM_X86__TRAPS_H +#include <asm/debugreg.h> + /* Common in X86_32 and X86_64 */ asmlinkage void divide_error(void); asmlinkage void debug(void); @@ -36,6 +38,16 @@ void do_invalid_op(struct pt_regs *, long); void do_general_protection(struct pt_regs *, long); void do_nmi(struct pt_regs *, long); +static inline int get_si_code(unsigned long condition) +{ + if (condition & DR_STEP) + return TRAP_TRACE; + else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) + return TRAP_HWBKPT; + else + return TRAP_BRKPT; +} + extern int panic_on_unrecovered_nmi; extern int kstack_depth_to_print; |