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88 lines
2.2 KiB
ArmAsm
88 lines
2.2 KiB
ArmAsm
/* Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson <rth@cygnus.com>, 1998
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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 <sysdep.h>
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/* On Alpha we desparately want to avoid having to issue an imb. Ordinarily
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the kernel would have to issue one after setting up the signal return
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stack, but the Linux rt_sigaction syscall is prepared to accept a pointer
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to the sigreturn syscall, instead of inlining it on the stack.
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This just about halves signal delivery time. */
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#ifdef __NR_rt_sigaction
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.text
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ENTRY(__syscall_rt_sigaction)
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.frame sp,0,ra,0
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#ifdef PROF
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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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#endif
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/* Indicate non-standard use of our PV. */
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.prologue 2
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beq a1, 0f
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ldl t0, 8(a1) # sa_flags
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lda a4, sigreturn-__syscall_rt_sigaction(pv)
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lda t1, rt_sigreturn-__syscall_rt_sigaction(pv)
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and t0, 0x00000040, t0 # SA_SIGINFO
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cmovne t0, t1, a4
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0: ldi v0,__NR_rt_sigaction
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callsys
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bne a3,1f
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ret
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1:
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#ifndef PROF
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br gp,2f
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2: ldgp gp,0(gp)
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#endif
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jmp __syscall_error
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END(__syscall_rt_sigaction)
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.align 5
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.ent sigreturn
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sigreturn:
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.prologue 0
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mov sp,a0
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ldi v0,__NR_sigreturn
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callsys
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.end sigreturn
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.align 4
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.ent rt_sigreturn
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rt_sigreturn:
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.prologue 0
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mov sp,a0
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ldi v0,__NR_rt_sigreturn
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callsys
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.end rt_sigreturn
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#else
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ENTRY(__syscall_rt_sigaction)
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ldgp $29,0($27)
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.prologue 1
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ldi $0,ENOSYS
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jmp __syscall_error
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END(__syscall_rt_sigaction)
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#endif
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