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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/include/asm/compat-signal.h
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#ifndef __ASM_COMPAT_SIGNAL_H

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#define __ASM_COMPAT_SIGNAL_H

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#include <linux/bug.h>

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#include <linux/compat.h>

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#include <linux/compiler.h>

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#include <asm/signal.h>

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#include <asm/siginfo.h>

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#include <asm/uaccess.h>

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#define SI_PAD_SIZE32   ((SI_MAX_SIZE/sizeof(int)) - 3)

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typedef struct compat_siginfo {

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	int si_signo;

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	int si_code;

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	int si_errno;

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	union {

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		int _pad[SI_PAD_SIZE32];

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		/* kill() */

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		struct {

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			compat_pid_t _pid;	/* sender's pid */

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			compat_uid_t _uid;	/* sender's uid */

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		} _kill;

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		/* SIGCHLD */

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		struct {

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			compat_pid_t _pid;	/* which child */

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			compat_uid_t _uid;	/* sender's uid */

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			int _status;		/* exit code */

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			compat_clock_t _utime;

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			compat_clock_t _stime;

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		} _sigchld;

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		/* IRIX SIGCHLD */

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		struct {

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			compat_pid_t _pid;	/* which child */

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			compat_clock_t _utime;

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			int _status;		/* exit code */

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			compat_clock_t _stime;

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		} _irix_sigchld;

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		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */

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		struct {

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			s32 _addr; /* faulting insn/memory ref. */

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		} _sigfault;

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		/* SIGPOLL, SIGXFSZ (To do ...)  */

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		struct {

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			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */

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			int _fd;

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		} _sigpoll;

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		/* POSIX.1b timers */

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		struct {

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			timer_t _tid;		/* timer id */

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			int _overrun;		/* overrun count */

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			compat_sigval_t _sigval;/* same as below */

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			int _sys_private;       /* not to be passed to user */

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		} _timer;

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		/* POSIX.1b signals */

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		struct {

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			compat_pid_t _pid;	/* sender's pid */

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			compat_uid_t _uid;	/* sender's uid */

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			compat_sigval_t _sigval;

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		} _rt;

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	} _sifields;

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} compat_siginfo_t;

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static inline int __copy_conv_sigset_to_user(compat_sigset_t __user *d,

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	const sigset_t *s)

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{

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	int err;

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	BUG_ON(sizeof(*d) != sizeof(*s));

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	BUG_ON(_NSIG_WORDS != 2);

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	err  = __put_user(s->sig[0],       &d->sig[0]);

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	err |= __put_user(s->sig[0] >> 32, &d->sig[1]);

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	err |= __put_user(s->sig[1],       &d->sig[2]);

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	err |= __put_user(s->sig[1] >> 32, &d->sig[3]);

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	return err;

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}

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static inline int __copy_conv_sigset_from_user(sigset_t *d,

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	const compat_sigset_t __user *s)

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{

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	int err;

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	union sigset_u {

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		sigset_t	s;

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		compat_sigset_t c;

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	} *u = (union sigset_u *) d;

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	BUG_ON(sizeof(*d) != sizeof(*s));

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	BUG_ON(_NSIG_WORDS != 2);

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#ifdef CONFIG_CPU_BIG_ENDIAN

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	err  = __get_user(u->c.sig[1], &s->sig[0]);

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	err |= __get_user(u->c.sig[0], &s->sig[1]);

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	err |= __get_user(u->c.sig[3], &s->sig[2]);

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	err |= __get_user(u->c.sig[2], &s->sig[3]);

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#endif

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#ifdef CONFIG_CPU_LITTLE_ENDIAN

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	err  = __get_user(u->c.sig[0], &s->sig[0]);

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	err |= __get_user(u->c.sig[1], &s->sig[1]);

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	err |= __get_user(u->c.sig[2], &s->sig[2]);

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	err |= __get_user(u->c.sig[3], &s->sig[3]);

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#endif

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	return err;

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}

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#endif /* __ASM_COMPAT_SIGNAL_H */

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