diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h index 2318edfcdb..5fd50b97db 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h @@ -41,17 +41,34 @@ #define LLL_MUTEX_LOCK_INITIALIZER (0) -#define LLL_ENTER_KERNEL "int $0x80\n\t" +#ifdef PIC +# define LLL_EBX_LOAD "xchgl %2, %%ebx\n" +# define LLL_EBX_REG "D" +#else +# define LLL_EBX_LOAD +# define LLL_EBX_REG "b" +#endif + +#ifdef I386_USE_SYSENTER +# ifdef SHARED +# define LLL_ENTER_KERNEL "call *%%gs:%P6\n\t" +# else +# define LLL_ENTER_KERNEL "call *_dl_sysinfo\n\t" +# endif +#else +# define LLL_ENTER_KERNEL "int $0x80\n\t" +#endif + #define lll_futex_wait(futex, val) \ do { \ int __ignore; \ register __typeof (val) _val asm ("edx") = (val); \ - __asm __volatile ("xchgl %2, %%ebx\n\t" \ + __asm __volatile (LLL_EBX_LOAD \ LLL_ENTER_KERNEL \ - "xchgl %2, %%ebx" \ + LLL_EBX_LOAD \ : "=a" (__ignore) \ - : "0" (SYS_futex), "D" (&futex), "S" (0), \ + : "0" (SYS_futex), LLL_EBX_REG (&futex), "S" (0), \ "c" (FUTEX_WAIT), "d" (_val), \ "i" (offsetof (tcbhead_t, sysinfo))); \ } while (0) @@ -61,12 +78,13 @@ do { \ int __ignore; \ register __typeof (nr) _nr asm ("edx") = (nr); \ - __asm __volatile ("xchgl %2, %%ebx\n\t" \ + __asm __volatile (LLL_EBX_LOAD \ LLL_ENTER_KERNEL \ - "xchgl %2, %%ebx" \ + LLL_EBX_LOAD \ : "=a" (__ignore) \ - : "0" (SYS_futex), "D" (&futex), "c" (FUTEX_WAKE), \ - "d" (_nr), "i" (0), \ + : "0" (SYS_futex), LLL_EBX_REG (&futex), \ + "c" (FUTEX_WAKE), "d" (_nr), \ + "i" (0) /* phony, to align next arg's number */, \ "i" (offsetof (tcbhead_t, sysinfo))); \ } while (0) @@ -277,37 +295,19 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden; afterwards. The macro parameter must not have any side effect. */ -#ifdef PIC -# define LLL_TID_EBX_LOAD "xchgl %2, %%ebx\n" -# define LLL_TID_EBX_REG "D" -#else -# define LLL_TID_EBX_LOAD -# define LLL_TID_EBX_REG "b" -#endif - -#ifdef I386_USE_SYSENTER -# ifdef SHARED -# define LLL_TID_ENTER_KERNEL "call *%%gs:%P6\n\t" -# else -# define LLL_TID_ENTER_KERNEL "call *_dl_sysinfo\n\t" -# endif -#else -# define LLL_TID_ENTER_KERNEL "int $0x80\n\t" -#endif - #define lll_wait_tid(tid) \ do { \ int __ignore; \ register __typeof (tid) _tid asm ("edx") = (tid); \ if (_tid != 0) \ - __asm __volatile (LLL_TID_EBX_LOAD \ + __asm __volatile (LLL_EBX_LOAD \ "1:\tmovl %1, %%eax\n\t" \ - LLL_TID_ENTER_KERNEL \ + LLL_ENTER_KERNEL \ "cmpl $0, (%%ebx)\n\t" \ "jne,pn 1b\n\t" \ - LLL_TID_EBX_LOAD \ + LLL_EBX_LOAD \ : "=&a" (__ignore) \ - : "i" (SYS_futex), LLL_TID_EBX_REG (&tid), "S" (0), \ + : "i" (SYS_futex), LLL_EBX_REG (&tid), "S" (0), \ "c" (FUTEX_WAIT), "d" (_tid), \ "i" (offsetof (tcbhead_t, sysinfo))); \ } while (0) |