diff options
Diffstat (limited to 'xen/include/asm-i386/current.h')
| -rw-r--r-- | xen/include/asm-i386/current.h | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/xen/include/asm-i386/current.h b/xen/include/asm-i386/current.h index bc1496a2c9..5a12a1201f 100644 --- a/xen/include/asm-i386/current.h +++ b/xen/include/asm-i386/current.h @@ -5,11 +5,42 @@ struct task_struct; static inline struct task_struct * get_current(void) { - struct task_struct *current; - __asm__("andl %%esp,%0; ":"=r" (current) : "0" (~8191UL)); - return current; - } + struct task_struct *current; + __asm__ ( "orl %%esp,%0; movl (%0),%0" + : "=r" (current) : "0" (4092UL) ); + return current; +} #define current get_current() +static inline void set_current(struct task_struct *p) +{ + __asm__ ( "orl %%esp,%0; movl %1,(%0)" + : : "r" (4092UL), "r" (p) ); +} + +static inline execution_context_t *get_execution_context(void) +{ + execution_context_t *execution_context; + __asm__ ( "andl %%esp,%0; addl $4096-72,%0" + : "=r" (execution_context) : "0" (~4095UL) ); + return execution_context; +} + +static inline unsigned long get_stack_top(void) +{ + unsigned long p; + __asm__ ( "orl %%esp,%0" + : "=r" (p) : "0" (4092UL) ); + return p; +} + +#define schedule_tail(_p) \ + __asm__ __volatile__ ( \ + "andl %%esp,%0; addl $4096-72,%0; movl %0,%%esp; jmp *%1" \ + : : "r" (~4095UL), "r" (unlikely(is_idle_task((_p))) ? \ + continue_cpu_idle_loop : \ + continue_nonidle_task) ) + + #endif /* !(_I386_CURRENT_H) */ |