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276 lines
7.4 KiB
C
276 lines
7.4 KiB
C
/* Copyright (C) 1992, 1995, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Brendan Kehoe (brendan@zen.org).
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdeps/unix/sysdep.h>
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#ifdef __ASSEMBLER__
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#ifdef __linux__
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# include <alpha/regdef.h>
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#else
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# include <regdef.h>
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#endif
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#ifdef __STDC__
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#define __LABEL(x) x##:
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#else
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#define __LABEL(x) x/**/:
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#endif
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#define LEAF(name, framesize) \
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.globl name; \
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.align 3; \
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.ent name, 0; \
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__LABEL(name) \
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.frame sp, framesize, ra
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#define ENTRY(name) \
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.globl name; \
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.align 3; \
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.ent name, 0; \
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__LABEL(name) \
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.frame sp, 0, ra
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/* Mark the end of function SYM. */
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#undef END
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#define END(sym) .end sym
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/* Note that PSEUDO/PSEUDO_END use label number 1996---do not use a
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label of that number between those two macros! */
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#ifdef PROF
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#define PSEUDO(name, syscall_name, args) \
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.globl name; \
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.align 3; \
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.ent name,0; \
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__LABEL(name) \
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.frame sp, 0, ra; \
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ldgp gp,0(pv); \
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.set noat; \
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lda AT,_mcount; \
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jsr AT,(AT),_mcount; \
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.set at; \
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.prologue 1; \
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ldiq v0, SYS_ify(syscall_name); \
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.set noat; \
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call_pal PAL_callsys; \
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.set at; \
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bne a3, 1996f; \
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3:
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#else
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#define PSEUDO(name, syscall_name, args) \
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.globl name; \
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.align 3; \
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.ent name,0; \
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__LABEL(name) \
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.frame sp, 0, ra \
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.prologue 0; \
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ldiq v0, SYS_ify(syscall_name); \
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.set noat; \
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call_pal PAL_callsys; \
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.set at; \
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bne a3, 1996f; \
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3:
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#endif
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#undef PSEUDO_END
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#ifdef PROF
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#define PSEUDO_END(sym) \
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1996: \
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jmp zero, __syscall_error; \
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END(sym)
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#else
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#define PSEUDO_END(sym) \
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1996: \
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br gp, 2f; \
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2: ldgp gp, 0(gp); \
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jmp zero, __syscall_error; \
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END(sym)
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#endif
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#define r0 v0
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#define r1 a4
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#define MOVE(x,y) mov x,y
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#else /* !ASSEMBLER */
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/* Define a macro which expands inline into the wrapper code for a
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system call. */
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#undef INLINE_SYSCALL
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#define INLINE_SYSCALL(name, nr, args...) 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"
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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) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0) \
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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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#define inline_syscall1(name,arg1) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16) \
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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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#define inline_syscall2(name,arg1,arg2) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17) \
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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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#define inline_syscall3(name,arg1,arg2,arg3) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \
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"r"(_sc_18) \
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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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#define inline_syscall4(name,arg1,arg2,arg3,arg4) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \
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"r"(_sc_18), "1"(_sc_19) \
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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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#define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \
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"r"(_sc_18), "1"(_sc_19), "r"(_sc_20) \
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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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#define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
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{ \
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register long _sc_0 __asm__("$0"); \
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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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: "=r"(_sc_0), "=r"(_sc_19) \
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: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \
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"r"(_sc_18), "1"(_sc_19), "r"(_sc_20), \
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"r"(_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 /* ASSEMBLER */
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