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263 lines
8.5 KiB
C
263 lines
8.5 KiB
C
/* Copyright (C) 1992, 1993, 1995, 1996, 1997, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LINUX_ALPHA_SYSDEP_H
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#define _LINUX_ALPHA_SYSDEP_H 1
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#ifdef __ASSEMBLER__
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#include <asm/pal.h>
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#include <alpha/regdef.h>
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#endif
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/* There is some commonality. */
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#include <sysdeps/unix/alpha/sysdep.h>
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/* For Linux we can use the system call table in the header file
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/usr/include/asm/unistd.h
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of the kernel. But these symbols do not follow the SYS_* syntax
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so we have to redefine the `SYS_ify' macro here. */
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#undef SYS_ify
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#ifdef __STDC__
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# define SYS_ify(syscall_name) __NR_##syscall_name
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#else
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# define SYS_ify(syscall_name) __NR_/**/syscall_name
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#endif
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/* Define some aliases to make automatic syscall generation work
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properly. The SYS_* variants are for the benefit of the files in
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sysdeps/unix. */
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#define __NR_getpid __NR_getxpid
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#define __NR_getuid __NR_getxuid
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#define __NR_getgid __NR_getxgid
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#define SYS_getpid __NR_getxpid
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#define SYS_getuid __NR_getxuid
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#define SYS_getgid __NR_getxgid
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/*
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* Some syscalls no Linux program should know about:
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*/
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#define __NR_osf_sigprocmask 48
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#define __NR_osf_shmat 209
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#define __NR_osf_getsysinfo 256
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#define __NR_osf_setsysinfo 257
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/*
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* In order to get the hidden arguments for rt_sigaction set up
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* properly, we need to call the assembly version. Detect this in the
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* INLINE_SYSCALL macro, and fail to expand inline in that case.
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*/
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#undef INLINE_SYSCALL
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#define INLINE_SYSCALL(name, nr, args...) \
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(__NR_##name == __NR_rt_sigaction \
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? __syscall_##name(args) \
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: INLINE_SYSCALL1(name, nr, args))
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#define INLINE_SYSCALL1(name, nr, args...) \
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({ \
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long _sc_ret, _sc_err; \
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inline_syscall##nr(name, args); \
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if (_sc_err) \
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{ \
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__set_errno (_sc_ret); \
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_sc_ret = -1L; \
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} \
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_sc_ret; \
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})
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#define inline_syscall_clobbers \
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"$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \
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"$22", "$23", "$24", "$25", "$27", "$28", "memory"
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/* If TLS is in use, we have a conflict between the PAL_rduniq primitive,
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as modeled within GCC, and explicit use of the R0 register. If we use
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the register via the asm, the scheduler may place the PAL_rduniq insn
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before we've copied the data from R0 into _sc_ret. If this happens
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we'll get a reload abort, since R0 is live at the same time it is
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needed for the PAL_rduniq.
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Solve this by using the "v" constraint instead of an asm for the syscall
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output. We don't do this unconditionally to allow compilation with
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older compilers. */
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#ifdef USE_TLS
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#define inline_syscall_r0_asm
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#define inline_syscall_r0_constraint "v"
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#else
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#define inline_syscall_r0_asm __asm__("$0")
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#define inline_syscall_r0_constraint "r"
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#endif
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/* It is moderately important optimization-wise to limit the lifetime
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of the hard-register variables as much as possible. Thus we copy
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in/out as close to the asm as possible. */
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#define inline_syscall0(name, args...) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_19 __asm__("$19"); \
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\
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_sc_0 = __NR_##name; \
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__asm__("callsys # %0 %1 <= %2" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19) \
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: "0"(_sc_0) \
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: inline_syscall_clobbers, \
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"$16", "$17", "$18", "$20", "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall1(name,arg1) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_19 __asm__("$19"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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__asm__("callsys # %0 %1 <= %2 %3" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19), "=r"(_sc_16) \
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: "0"(_sc_0), "2"(_sc_16) \
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: inline_syscall_clobbers, \
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"$17", "$18", "$20", "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall2(name,arg1,arg2) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_17 __asm__("$17"); \
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register long _sc_19 __asm__("$19"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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_sc_17 = (long) (arg2); \
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__asm__("callsys # %0 %1 <= %2 %3 %4" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17) \
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: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17) \
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: inline_syscall_clobbers, \
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"$18", "$20", "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall3(name,arg1,arg2,arg3) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_17 __asm__("$17"); \
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register long _sc_18 __asm__("$18"); \
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register long _sc_19 __asm__("$19"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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_sc_17 = (long) (arg2); \
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_sc_18 = (long) (arg3); \
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__asm__("callsys # %0 %1 <= %2 %3 %4 %5" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
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"=r"(_sc_18) \
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: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
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"4"(_sc_18) \
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: inline_syscall_clobbers, "$20", "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall4(name,arg1,arg2,arg3,arg4) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_17 __asm__("$17"); \
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register long _sc_18 __asm__("$18"); \
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register long _sc_19 __asm__("$19"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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_sc_17 = (long) (arg2); \
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_sc_18 = (long) (arg3); \
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_sc_19 = (long) (arg4); \
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__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
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"=r"(_sc_18) \
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: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
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"4"(_sc_18), "1"(_sc_19) \
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: inline_syscall_clobbers, "$20", "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_17 __asm__("$17"); \
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register long _sc_18 __asm__("$18"); \
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register long _sc_19 __asm__("$19"); \
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register long _sc_20 __asm__("$20"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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_sc_17 = (long) (arg2); \
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_sc_18 = (long) (arg3); \
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_sc_19 = (long) (arg4); \
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_sc_20 = (long) (arg5); \
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__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
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"=r"(_sc_18), "=r"(_sc_20) \
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: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
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"4"(_sc_18), "1"(_sc_19), "5"(_sc_20) \
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: inline_syscall_clobbers, "$21"); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
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{ \
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register long _sc_0 inline_syscall_r0_asm; \
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register long _sc_16 __asm__("$16"); \
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register long _sc_17 __asm__("$17"); \
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register long _sc_18 __asm__("$18"); \
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register long _sc_19 __asm__("$19"); \
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register long _sc_20 __asm__("$20"); \
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register long _sc_21 __asm__("$21"); \
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\
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_sc_0 = __NR_##name; \
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_sc_16 = (long) (arg1); \
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_sc_17 = (long) (arg2); \
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_sc_18 = (long) (arg3); \
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_sc_19 = (long) (arg4); \
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_sc_20 = (long) (arg5); \
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_sc_21 = (long) (arg6); \
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__asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
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: "=" inline_syscall_r0_constraint (_sc_0), \
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"=r"(_sc_19) "=r"(_sc_16), "=r"(_sc_17), \
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"=r"(_sc_18), "=r"(_sc_20), "=r"(_sc_21) \
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: "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
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"4"(_sc_18), "1"(_sc_19), "5"(_sc_20), \
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"6"(_sc_21) \
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: inline_syscall_clobbers); \
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_sc_ret = _sc_0, _sc_err = _sc_19; \
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}
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#endif /* _LINUX_ALPHA_SYSDEP_H */
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