From 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Thu, 8 Jun 2017 15:39:03 -0400 Subject: Prepare for radical source tree reorganization. All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control). --- .../unix/sysv/linux/m68k/m680x0/swapcontext.S | 108 +++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 REORG.TODO/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S') diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S b/REORG.TODO/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S new file mode 100644 index 0000000000..b36a5db21c --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S @@ -0,0 +1,108 @@ +/* Save current context and install the given one. + Copyright (C) 2012-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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, see + . */ + +#include + +#include "ucontext_i.h" + + +ENTRY(__swapcontext) + /* Load address of the context data structure we save in. */ + move.l 4(%sp), %a0 + + /* Save the preserved registers and the return address. */ + movem.l %d2-%d7, oGREGS+2*4(%a0) + movem.l %a2-%a6, oGREGS+10*4(%a0) + lea 4(%sp), %a1 + move.l %a1, oSP(%a0) + move.l (%sp), oPC(%a0) + fmovem.l %fpsr/%fpcr/%fpiar, oFPREGS(%a0) + fmovem.x %fp2-%fp7, oFP2(%a0) + cfi_def_cfa (%a0, 0) + cfi_offset (%d2, oGREGS+2*4) + cfi_offset (%d3, oGREGS+3*4) + cfi_offset (%a2, oGREGS+10*4) + cfi_offset (%pc, oPC) + + /* Load address of the context data structure we have to load. */ + move.l 8(%sp), %a1 + + /* Save the current signal mask and install the new one. */ + lea oSIGMASK(%a0), %a2 + move.l %a2, %d3 + lea oSIGMASK(%a1), %a2 + move.l %a2, %d2 + move.l #SIG_SETMASK, %d1 + move.l #__NR_sigprocmask, %d0 + trap #0 + cmp.l #-4095, %d0 /* Check %d0 for error. */ + jcs 0f + /* Restore registers. */ + move.l oGREGS+2*4(%a0), %d2 + cfi_restore (%d2) + move.l oGREGS+3*4(%a0), %d3 + cfi_restore (%d3) + move.l oGREGS+10*4(%a0), %a2 + cfi_restore (%a2) + jra SYSCALL_ERROR_LABEL /* Jump to error handler. */ + +0: /* Load the new stack pointer. */ + move.l oSP(%a1), %sp + cfi_def_cfa (%a1, 0) + cfi_offset (%d2, oGREGS+2*4) + cfi_offset (%d3, oGREGS+3*4) + cfi_offset (%d4, oGREGS+4*4) + cfi_offset (%d5, oGREGS+5*4) + cfi_offset (%d6, oGREGS+6*4) + cfi_offset (%d7, oGREGS+7*4) + cfi_offset (%a2, oGREGS+10*4) + cfi_offset (%a3, oGREGS+11*4) + cfi_offset (%a4, oGREGS+12*4) + cfi_offset (%a5, oGREGS+13*4) + cfi_offset (%a6, oGREGS+14*4) + cfi_offset (%fp2, oFP2+0*12) + cfi_offset (%fp3, oFP2+1*12) + cfi_offset (%fp4, oFP2+2*12) + cfi_offset (%fp5, oFP2+3*12) + cfi_offset (%fp6, oFP2+4*12) + cfi_offset (%fp7, oFP2+5*12) + cfi_offset (%pc, oPC) + + /* Load the values of all the preserved registers (except SP). */ + movem.l oGREGS+2*4(%a1), %d2-%d7 + movem.l oGREGS+10*4(%a1), %a2-%a6 + fmovem.l oFPREGS(%a1), %fpsr/%fpcr/%fpiar + fmovem.x oFP2(%a1), %fp2-%fp7 + + /* Clear D0 to indicate success. */ + clr.l %d0 + + /* Fetch the address to return to. */ + move.l oPC(%a1), %a0 + + /* End FDE here, we fall into another context. */ + cfi_endproc + cfi_startproc + cfi_register (%pc, %a0) + + jmp (%a0) + + cfi_offset (%pc, -4) +PSEUDO_END(__swapcontext) + +weak_alias (__swapcontext, swapcontext) -- cgit 1.4.1