+2012-07-16 Andreas Schwab <schwab@linux-m68k.org>
+
+ * sysdeps/unix/sysv/linux/m68k/m680x0/Makefile: New file.
+ * sysdeps/unix/sysv/linux/m68k/m680x0/getcontext.S: New file.
+ * sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S: New file.
+ * sysdeps/unix/sysv/linux/m68k/m680x0/setcontext.S: New file.
+ * sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S: New file.
+ * sysdeps/unix/sysv/linux/m68k/m680x0/ucontext_i.sym: New file.
+
2012-07-09 Andreas Schwab <schwab@linux-m68k.org>
* sysdeps/m68k/m680x0/fpu/libm-test-ulps: Update.
--- /dev/null
+ifeq ($(subdir),stdlib)
+gen-as-const-headers += ucontext_i.sym
+endif
--- /dev/null
+/* Save current context.
+ Copyright (C) 2012 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+
+ENTRY(__getcontext)
+ /* Load address of the context data structure. */
+ 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 (%pc, oPC)
+
+ /* Save the current signal mask. */
+ lea oSIGMASK(%a0), %a1
+ move.l %a1, %d3
+ clr.l %d2
+ move.l #SIG_SETMASK, %d1
+ move.l #__NR_sigprocmask, %d0
+ trap #0
+ /* Restore registers. */
+ move.l oGREGS+2*4(%a0), %d2
+ cfi_restore (%d2)
+ move.l oGREGS+3*4(%a0), %d3
+ cfi_restore (%d3)
+ cfi_def_cfa (%sp, 4)
+ cfi_offset (%pc, -4)
+ cmp.l #-4095, %d0 /* Check %d0 for error. */
+ jcc SYSCALL_ERROR_LABEL /* Jump to error handler. */
+
+0: /* All done, return 0 for success. */
+ clr.l %d0
+ rts
+PSEUDO_END(__getcontext)
+
+weak_alias (__getcontext, getcontext)
--- /dev/null
+/* Create new context.
+ Copyright (C) 2012 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+
+ENTRY(__makecontext)
+ move.l 4(%sp), %a0
+
+ /* Get the address of the function we are supposed to run. */
+ move.l 8(%sp), oPC(%a0)
+
+ /* Compute the address of the stack. The information comes from
+ to us_stack element. */
+ move.l oSS_SP(%a0), %a1
+ add.l oSS_SIZE(%a0), %a1
+
+ /* Remember the number of parameters for the exit handler since
+ it has to remove them. We store the number in the D7 register
+ which the function we will call must preserve. */
+ move.l 12(%sp), %d1
+ move.l %d1, oGREGS+7*4(%a0)
+
+ /* Make room on the new stack for the parameters.
+ Room for the arguments, return address (== 1f) and
+ oLINK pointer is needed. */
+ neg.l %d1
+ lea -8(%a1,%d1.l*4), %a1
+ neg.l %d1
+
+ /* Store the future stack pointer. */
+ move.l %a1, oSP(%a0)
+
+ /* Put the next context on the new stack (from the uc_link
+ element). */
+ move.l oLINK(%a0), 4(%a1,%d1.l*4)
+
+ /* Copy all the parameters. */
+1: subq.l #1,%d1
+ jmi 2f
+ move.l 16(%sp,%d1.l*4), 4(%a1,%d1.l*4)
+ jra 1b
+2:
+
+ /* If the function we call returns we must continue with the
+ context which is given in the uc_link element. To do this
+ set the return address for the function the user provides
+ to a little bit of helper code which does the magic (see
+ below). */
+ lea 1f(%pc), %a0
+ move.l %a0, (%a1)
+ /* 'makecontext' returns no value. */
+ rts
+
+ /* This is the helper code which gets called if a function which
+ is registered with 'makecontext' returns. In this case we
+ have to install the context listed in the uc_link element of
+ the context 'makecontext' manipulated at the time of the
+ 'makecontext' call. If the pointer is NULL the process must
+ terminate. */
+ cfi_endproc
+1:
+ /* This removes the parameters passed to the function given to
+ 'makecontext' from the stack. D7 contains the number of
+ parameters (see above). */
+ lea (%sp,%d7.l*4), %sp
+
+ tst.l (%sp) /* Check the next context. */
+ jeq 2f /* If it is zero exit. */
+
+ jbsr JUMPTARGET(__setcontext)
+ /* If this returns (which can happen if the syscall fails) we'll
+ exit the program with the return error value (-1). */
+
+ move.l %d0, (%sp)
+2: jbsr HIDDEN_JUMPTARGET(exit)
+ /* The 'exit' call should never return. In case it does cause
+ the process to terminate. */
+ illegal
+ cfi_startproc
+END(__makecontext)
+
+weak_alias (__makecontext, makecontext)
--- /dev/null
+/* Install given context.
+ Copyright (C) 2012 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+ENTRY(__setcontext)
+ /* Load address of the context data structure. */
+ move.l 4(%sp), %a0
+
+ /* Get the current signal mask. Note that we preserve D2/D3 in case
+ the system call fails and we return from the function with an
+ error. */
+ move.l %d3, -(%sp)
+ cfi_adjust_cfa_offset (4)
+ cfi_rel_offset (%d3, 0)
+ move.l %d2, -(%sp)
+ cfi_adjust_cfa_offset (4)
+ cfi_rel_offset (%d2, 0)
+ clr.l %d3
+ lea oSIGMASK(%a0), %a1
+ move.l %a1, %d2
+ move.l #SIG_SETMASK, %d1
+ move.l #__NR_sigprocmask, %d0
+ trap #0
+ cmp.l #-4095, %d0 /* Check %d0 for error. */
+ jcs 0f
+ move.l (%sp)+, %d2
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (d2)
+ move.l (%sp)+, %d3
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (d3)
+ jra SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
+
+0: /* Load the new stack pointer. */
+ move.l oSP(%a0), %sp
+ cfi_def_cfa (%a0, 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(%a0), %d2-%d7
+ movem.l oGREGS+10*4(%a0), %a2-%a6
+ fmovem.l oFPREGS(%a0), %fpsr/%fpcr/%fpiar
+ fmovem.x oFP2(%a0), %fp2-%fp7
+ clr.l %d0
+
+ /* Fetch the address to return to. */
+ movl oPC(%a0), %a1
+
+ /* End FDE here, we fall into another context. */
+ cfi_endproc
+ cfi_startproc
+ cfi_register (%pc, %a1)
+
+ jmp (%a1)
+
+ cfi_offset (%pc, -4)
+PSEUDO_END(__setcontext)
+
+weak_alias (__setcontext, setcontext)
--- /dev/null
+/* Save current context and install the given one.
+ Copyright (C) 2012 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+#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)
--- /dev/null
+#include <stddef.h>
+#include <signal.h>
+#include <sys/ucontext.h>
+
+--
+
+SIG_SETMASK
+
+#define ucontext(member) offsetof (ucontext_t, member)
+#define mcontext(member) ucontext (uc_mcontext.member)
+
+oLINK ucontext (uc_link)
+oSS_SP ucontext (uc_stack.ss_sp)
+oSS_SIZE ucontext (uc_stack.ss_size)
+oGREGS mcontext (gregs)
+oSP mcontext (gregs[R_SP])
+oPC mcontext (gregs[R_PC])
+oFPREGS mcontext (fpregs)
+oFP2 mcontext (fpregs.f_fpregs[2])
+oSIGMASK ucontext (uc_sigmask)
projects / platform / upstream / linaro-glibc.git / commitdiff