| Server IP : 13.213.54.232 / Your IP : 216.73.216.72 Web Server : Apache/2.4.52 (Ubuntu) System : Linux ip-172-31-17-110 6.8.0-1029-aws #31~22.04.1-Ubuntu SMP Thu Apr 24 21:16:18 UTC 2025 x86_64 User : www-data ( 33) PHP Version : 7.1.33-67+ubuntu22.04.1+deb.sury.org+1 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /proc/thread-self/root/usr/lib/modules/6.8.0-1031-aws/build/arch/openrisc/include/asm/ |
Upload File : |
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_OPENRISC_FUTEX_H
#define __ASM_OPENRISC_FUTEX_H
#ifdef __KERNEL__
#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
({ \
__asm__ __volatile__ ( \
"1: l.lwa %0, %2 \n" \
insn "\n" \
"2: l.swa %2, %1 \n" \
" l.bnf 1b \n" \
" l.ori %1, r0, 0 \n" \
"3: \n" \
".section .fixup,\"ax\" \n" \
"4: l.j 3b \n" \
" l.addi %1, r0, %3 \n" \
".previous \n" \
".section __ex_table,\"a\" \n" \
".word 1b,4b,2b,4b \n" \
".previous \n" \
: "=&r" (oldval), "=&r" (ret), "+m" (*uaddr) \
: "i" (-EFAULT), "r" (oparg) \
: "cc", "memory" \
); \
})
static inline int
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int oldval = 0, ret;
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
switch (op) {
case FUTEX_OP_SET:
__futex_atomic_op("l.or %1,%4,%4", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
__futex_atomic_op("l.add %1,%0,%4", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
__futex_atomic_op("l.or %1,%0,%4", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
__futex_atomic_op("l.and %1,%0,%4", ret, oldval, uaddr, ~oparg);
break;
case FUTEX_OP_XOR:
__futex_atomic_op("l.xor %1,%0,%4", ret, oldval, uaddr, oparg);
break;
default:
ret = -ENOSYS;
}
if (!ret)
*oval = oldval;
return ret;
}
static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
u32 oldval, u32 newval)
{
int ret = 0;
u32 prev;
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
__asm__ __volatile__ ( \
"1: l.lwa %1, %2 \n" \
" l.sfeq %1, %3 \n" \
" l.bnf 3f \n" \
" l.nop \n" \
"2: l.swa %2, %4 \n" \
" l.bnf 1b \n" \
" l.nop \n" \
"3: \n" \
".section .fixup,\"ax\" \n" \
"4: l.j 3b \n" \
" l.addi %0, r0, %5 \n" \
".previous \n" \
".section __ex_table,\"a\" \n" \
".word 1b,4b,2b,4b \n" \
".previous \n" \
: "+r" (ret), "=&r" (prev), "+m" (*uaddr) \
: "r" (oldval), "r" (newval), "i" (-EFAULT) \
: "cc", "memory" \
);
*uval = prev;
return ret;
}
#endif /* __KERNEL__ */
#endif /* __ASM_OPENRISC_FUTEX_H */