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/* Copyright (C) 1992, 1993, 1995, 1996, 1997, 2002, 2003
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _LINUX_ALPHA_SYSDEP_H
#define _LINUX_ALPHA_SYSDEP_H 1
#ifdef __ASSEMBLER__
#include <asm/pal.h>
#include <alpha/regdef.h>
#endif
/* There is some commonality. */
#include <sysdeps/unix/alpha/sysdep.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
of the kernel. But these symbols do not follow the SYS_* syntax
so we have to redefine the `SYS_ify' macro here. */
#undef SYS_ify
#ifdef __STDC__
# define SYS_ify(syscall_name) __NR_##syscall_name
#else
# define SYS_ify(syscall_name) __NR_/**/syscall_name
#endif
/* Define some aliases to make automatic syscall generation work
properly. The SYS_* variants are for the benefit of the files in
sysdeps/unix. */
#define __NR_getpid __NR_getxpid
#define __NR_getuid __NR_getxuid
#define __NR_getgid __NR_getxgid
#define SYS_getpid __NR_getxpid
#define SYS_getuid __NR_getxuid
#define SYS_getgid __NR_getxgid
/*
* Some syscalls no Linux program should know about:
*/
#define __NR_osf_sigprocmask 48
#define __NR_osf_shmat 209
#define __NR_osf_getsysinfo 256
#define __NR_osf_setsysinfo 257
/*
* In order to get the hidden arguments for rt_sigaction set up
* properly, we need to call the assembly version. Detect this in the
* INLINE_SYSCALL macro, and fail to expand inline in that case.
*/
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
(__NR_##name == __NR_rt_sigaction \
? __syscall_##name(args) \
: INLINE_SYSCALL1(name, nr, args))
#define INLINE_SYSCALL1(name, nr, args...) \
({ \
long _sc_ret, _sc_err; \
inline_syscall##nr(name, args); \
if (_sc_err) \
{ \
__set_errno (_sc_ret); \
_sc_ret = -1L; \
} \
_sc_ret; \
})
#define inline_syscall_clobbers \
"$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \
"$22", "$23", "$24", "$25", "$27", "$28", "memory"
/* If TLS is in use, we have a conflict between the PAL_rduniq primitive,
as modeled within GCC, and explicit use of the R0 register. If we use
the register via the asm, the scheduler may place the PAL_rduniq insn
before we've copied the data from R0 into _sc_ret. If this happens
we'll get a reload abort, since R0 is live at the same time it is
needed for the PAL_rduniq.
Solve this by using the "v" constraint instead of an asm for the syscall
output. We don't do this unconditionally to allow compilation with
older compilers. */
#ifdef USE_TLS
#define inline_syscall_r0_asm
#define inline_syscall_r0_out_constraint "=v"
#else
#define inline_syscall_r0_asm __asm__("$0")
#define inline_syscall_r0_out_constraint "=r"
#endif
/* It is moderately important optimization-wise to limit the lifetime
of the hard-register variables as much as possible. Thus we copy
in/out as close to the asm as possible. */
#define inline_syscall0(name, args...) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
__asm__("callsys # %0 %1 <= %2" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19) \
: "0"(_sc_0) \
: inline_syscall_clobbers, \
"$16", "$17", "$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall1(name,arg1) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
__asm__("callsys # %0 %1 <= %2 %3" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19), "=r"(_sc_16) \
: "0"(_sc_0), "2"(_sc_16) \
: inline_syscall_clobbers, \
"$17", "$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall2(name,arg1,arg2) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_17 __asm__("$17"); \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
__asm__("callsys # %0 %1 <= %2 %3 %4" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17) \
: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17) \
: inline_syscall_clobbers, \
"$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall3(name,arg1,arg2,arg3) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_17 __asm__("$17"); \
register long _sc_18 __asm__("$18"); \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
__asm__("callsys # %0 %1 <= %2 %3 %4 %5" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
"=r"(_sc_18) \
: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
"4"(_sc_18) \
: inline_syscall_clobbers, "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall4(name,arg1,arg2,arg3,arg4) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_17 __asm__("$17"); \
register long _sc_18 __asm__("$18"); \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
_sc_19 = (long) (arg4); \
__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
"=r"(_sc_18) \
: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
"4"(_sc_18), "1"(_sc_19) \
: inline_syscall_clobbers, "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_17 __asm__("$17"); \
register long _sc_18 __asm__("$18"); \
register long _sc_19 __asm__("$19"); \
register long _sc_20 __asm__("$20"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
_sc_19 = (long) (arg4); \
_sc_20 = (long) (arg5); \
__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
"=r"(_sc_18), "=r"(_sc_20) \
: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
"4"(_sc_18), "1"(_sc_19), "5"(_sc_20) \
: inline_syscall_clobbers, "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
{ \
register long _sc_0 inline_syscall_r0_asm; \
register long _sc_16 __asm__("$16"); \
register long _sc_17 __asm__("$17"); \
register long _sc_18 __asm__("$18"); \
register long _sc_19 __asm__("$19"); \
register long _sc_20 __asm__("$20"); \
register long _sc_21 __asm__("$21"); \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
_sc_19 = (long) (arg4); \
_sc_20 = (long) (arg5); \
_sc_21 = (long) (arg6); \
__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
: inline_syscall_r0_out_constraint (_sc_0), \
"=r"(_sc_19) "=r"(_sc_16), "=r"(_sc_17), \
"=r"(_sc_18), "=r"(_sc_20), "=r"(_sc_21) \
: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
"4"(_sc_18), "1"(_sc_19), "5"(_sc_20), \
"6"(_sc_21) \
: inline_syscall_clobbers); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
#endif /* _LINUX_ALPHA_SYSDEP_H */
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