Release 4.14 arch/sparc/include/asm/futex_64.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SPARC64_FUTEX_H

#define _SPARC64_FUTEX_H

#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>


#define __futex_cas_op(insn, ret, oldval, uaddr, oparg)	\
	__asm__ __volatile__(                           \
        "\n1:   lduwa   [%3] %%asi, %2\n"               \
        "       " insn "\n"                             \
        "2:     casa    [%3] %%asi, %2, %1\n"           \
        "       cmp     %2, %1\n"                       \
        "       bne,pn  %%icc, 1b\n"                    \
        "        mov    0, %0\n"                        \
        "3:\n"                                          \
        "       .section .fixup,#alloc,#execinstr\n"    \
        "       .align  4\n"                            \
        "4:     sethi   %%hi(3b), %0\n"                 \
        "       jmpl    %0 + %%lo(3b), %%g0\n"          \
        "        mov    %5, %0\n"                       \
        "       .previous\n"                            \
        "       .section __ex_table,\"a\"\n"            \
        "       .align  4\n"                            \
        "       .word   1b, 4b\n"                       \
        "       .word   2b, 4b\n"                       \
        "       .previous\n"                            \
        : "=&r" (ret), "=&r" (oldval), "=&r" (tem)      \
        : "r" (uaddr), "r" (oparg), "i" (-EFAULT)       \
        : "memory")



static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
		u32 __user *uaddr)
{
	int oldval = 0, ret, tem;

	if (unlikely((((unsigned long) uaddr) & 0x3UL)))
		return -EINVAL;

	pagefault_disable();

	switch (op) {
	case FUTEX_OP_SET:
		__futex_cas_op("mov\t%4, %1", ret, oldval, uaddr, oparg);
		break;
	case FUTEX_OP_ADD:
		__futex_cas_op("add\t%2, %4, %1", ret, oldval, uaddr, oparg);
		break;
	case FUTEX_OP_OR:
		__futex_cas_op("or\t%2, %4, %1", ret, oldval, uaddr, oparg);
		break;
	case FUTEX_OP_ANDN:
		__futex_cas_op("andn\t%2, %4, %1", ret, oldval, uaddr, oparg);
		break;
	case FUTEX_OP_XOR:
		__futex_cas_op("xor\t%2, %4, %1", ret, oldval, uaddr, oparg);
		break;
	default:
		ret = -ENOSYS;
	}

	pagefault_enable();

	if (!ret)
		*oval = oldval;

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sam Ravnborg
155
92.26%
1
25.00%
Jiri Slaby
11
6.55%
1
25.00%
Michel Lespinasse
1
0.60%
1
25.00%
Mikael Pettersson
1
0.60%
1
25.00%
Total
168
100.00%
4
100.00%


static inline int

futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
			      u32 oldval, u32 newval)
{
	int ret = 0;

	__asm__ __volatile__(
        "\n1:   casa    [%4] %%asi, %3, %1\n"
        "2:\n"
        "       .section .fixup,#alloc,#execinstr\n"
        "       .align  4\n"
        "3:     sethi   %%hi(2b), %0\n"
        "       jmpl    %0 + %%lo(2b), %%g0\n"
        "       mov     %5, %0\n"
        "       .previous\n"
        "       .section __ex_table,\"a\"\n"
        "       .align  4\n"
        "       .word   1b, 3b\n"
        "       .previous\n"
        : "+r" (ret), "=r" (newval)
        : "1" (newval), "r" (oldval), "r" (uaddr), "i" (-EFAULT)
        : "memory");

	*uval = newval;
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sam Ravnborg
19
50.00%
1
33.33%
Michel Lespinasse
19
50.00%
2
66.67%
Total
38
100.00%
3
100.00%

#endif /* !(_SPARC64_FUTEX_H) */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Sam Ravnborg
208
86.31%
1
16.67%
Michel Lespinasse
20
8.30%
2
33.33%
Jiri Slaby
11
4.56%
1
16.67%
Mikael Pettersson
1
0.41%
1
16.67%
Greg Kroah-Hartman
1
0.41%
1
16.67%
Total
241
100.00%
6
100.00%
Directory: arch/sparc/include/asm

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