diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/rt_sigaction.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/rt_sigaction.S | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S deleted file mode 100644 index e27949feff..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S +++ /dev/null @@ -1,120 +0,0 @@ -/* Copyright (C) 1998, 2003, 2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson <rth@cygnus.com>, 1998 - - 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. */ - -#include <sysdep.h> - -/* On Alpha we desparately want to avoid having to issue an imb. Ordinarily - the kernel would have to issue one after setting up the signal return - stack, but the Linux rt_sigaction syscall is prepared to accept a pointer - to the sigreturn syscall, instead of inlining it on the stack. - - This just about halves signal delivery time. */ - - .text - -ENTRY(__syscall_rt_sigaction) - .frame sp,0,ra,0 - ldgp gp,0(pv) -#ifdef PROF - .set noat - lda AT, _mcount - jsr AT, (AT), _mcount - .set at -#endif - .prologue 1 - - beq a1, 0f - ldl t0, 8(a1) # sa_flags - - /* The unwinder will subtract one from the return address when - attempting to find the call instruction that led us here. - Since we didn't get here via a normal call, if we do nothing - we would pick up the wrong symbol and the wrong FDE. Account - for this by adding a nop to the start of the function and - then skipping it here by adding 4. */ - ldah a4, __syscall_sigreturn+4(gp) !gprelhigh - ldah t1, __syscall_rt_sigreturn+4(gp) !gprelhigh - lda a4, __syscall_sigreturn+4(a4) !gprellow - lda t1, __syscall_rt_sigreturn+4(t1) !gprellow - and t0, 0x40, t0 # SA_SIGINFO - cmovne t0, t1, a4 - -0: ldi v0, __NR_rt_sigaction - callsys - bne a3, SYSCALL_ERROR_LABEL - ret - -PSEUDO_END(__syscall_rt_sigaction) - -/* To enable unwinding through the signal frame without special hackery - elsewhere, describe the entire struct sigcontext with unwind info. - - In order to minimize the size of the encoding, we set the CFA to the - end of the sigcontext, which makes all of the registers have small - negative offsets from that. */ - - .macro SIGCONTEXT_REGS_I base, from=0 - cfi_offset (\from, \base + (4 + \from) * 8) - .if 30-\from - SIGCONTEXT_REGS_I \base, "(\from+1)" - .endif - .endm - - .macro SIGCONTEXT_REGS_F base, from=32 - cfi_offset (\from, \base + (4 + 1 + \from) * 8) - .if 62-\from - SIGCONTEXT_REGS_F \base, "(\from+1)" - .endif - .endm - - .macro SIGCONTEXT_REGS base - SIGCONTEXT_REGS_I \base - SIGCONTEXT_REGS_F \base - cfi_offset (63, \base + (4 + 32 + 1 + 32) * 8) - cfi_offset (64, \base + 2 * 8) - .endm - - .align 4 - nop - nop - nop - - cfi_startproc - cfi_return_column (64) - SIGCONTEXT_REGS -648 - - cfi_def_cfa_offset (648) -__syscall_sigreturn: - nop - mov sp, a0 - ldi v0, __NR_sigreturn - callsys - .size __syscall_sigreturn, .-__syscall_sigreturn - .type __syscall_sigreturn, @function - - cfi_def_cfa_offset (176 + 648) -__syscall_rt_sigreturn: - nop - mov sp,a0 - ldi v0,__NR_rt_sigreturn - callsys - .size __syscall_rt_sigreturn, .-__syscall_rt_sigreturn - .type __syscall_rt_sigreturn, @function - - cfi_endproc |