From 7e261ba3d85d10eefbb55f2e9d67c55910dfae2f Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Fri, 12 Mar 2010 21:37:02 +0100 Subject: [PATCH] Add m68k-helpers optimized for m680x0 --- ChangeLog.m68k | 7 ++ .../linux/m68k/{ => coldfire}/m68k-helpers.S | 0 .../sysv/linux/m68k/m680x0/m68k-helpers.S | 103 ++++++++++++++++++ 3 files changed, 110 insertions(+) rename sysdeps/unix/sysv/linux/m68k/{ => coldfire}/m68k-helpers.S (100%) create mode 100644 sysdeps/unix/sysv/linux/m68k/m680x0/m68k-helpers.S diff --git a/ChangeLog.m68k b/ChangeLog.m68k index 32681fff72..446a30707e 100644 --- a/ChangeLog.m68k +++ b/ChangeLog.m68k @@ -1,3 +1,10 @@ +2010-03-12 Andreas Schwab + + * sysdeps/unix/sysv/linux/m68k/m68k-helpers.S: Renamed ... + * sysdeps/unix/sysv/linux/m68k/coldfire/m68k-helpers.S: ... to + this. + * sysdeps/unix/sysv/linux/m68k/m680x0/m68k-helpers.S: New file. + 2010-03-09 Maxim Kuvyrkov NPTL support for m68k/ColdFire diff --git a/sysdeps/unix/sysv/linux/m68k/m68k-helpers.S b/sysdeps/unix/sysv/linux/m68k/coldfire/m68k-helpers.S similarity index 100% rename from sysdeps/unix/sysv/linux/m68k/m68k-helpers.S rename to sysdeps/unix/sysv/linux/m68k/coldfire/m68k-helpers.S diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/m68k-helpers.S b/sysdeps/unix/sysv/linux/m68k/m680x0/m68k-helpers.S new file mode 100644 index 0000000000..83ce56423a --- /dev/null +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/m68k-helpers.S @@ -0,0 +1,103 @@ +/* Copyright (C) 2010 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maxim Kuvyrkov , 2010. + + 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. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The GNU Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + 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 +#include + + .text + + .hidden __vdso_read_tp_stub +ENTRY (__vdso_read_tp_stub) + cfi_startproc + move.l #__NR_get_thread_area, %d0 + trap #0 + move.l %d0, %a0 + rts + cfi_endproc +END (__vdso_read_tp_stub) + +# ifdef SHARED +/* GCC will emit calls to this routine. Linux has an + equivalent helper function (which clobbers fewer registers than + a normal function call) in a vdso; tail call to the + helper. */ +# ifdef IS_IN_rtld +/* rtld gets a hidden copy of __m68k_read_tp. */ + .hidden __m68k_read_tp +# endif +ENTRY (__m68k_read_tp) + cfi_startproc + lea _GLOBAL_OFFSET_TABLE_@GOTPC(%pc), %a0 + move.l M68K_VDSO_SYMBOL (__vdso_read_tp)@GOT(%a0), %a0 + jmp ([%a0]) + cfi_endproc +END (__m68k_read_tp) + +/* The following two stubs are for macros in atomic.h, they can't + clobber anything. */ + + .hidden __vdso_atomic_cmpxchg_32_stub +ENTRY (__vdso_atomic_cmpxchg_32_stub) + cfi_startproc + move.l %d2, -(%sp) + cfi_adjust_cfa_offset (4) + cfi_rel_offset (%d2, 0) + move.l %d0, %d2 + move.l #SYS_ify (atomic_cmpxchg_32), %d0 + trap #0 + move.l (%sp)+, %d2 + cfi_adjust_cfa_offset (-4) + cfi_restore (%d2) + rts + cfi_endproc +END (__vdso_atomic_cmpxchg_32_stub) + + .hidden __vdso_atomic_barrier_stub +ENTRY (__vdso_atomic_barrier_stub) + cfi_startproc + move.l %d0, -(%sp) + cfi_adjust_cfa_offset (4) + move.l #SYS_ify (atomic_barrier), %d0 + trap #0 + move.l (%sp)+, %d0 + cfi_adjust_cfa_offset (-4) + rts + cfi_endproc +END (__vdso_atomic_barrier_stub) +# else /* !SHARED */ +/* If the vDSO is not available, use a syscall to get TP. */ + strong_alias (__vdso_read_tp_stub, __m68k_read_tp) +# endif /* SHARED */ -- 2.43.5