diff options
| -rw-r--r-- | ports/ChangeLog.m68k | 9 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/Makefile | 3 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/getcontext.S | 63 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S | 100 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/setcontext.S | 94 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S | 108 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/ucontext_i.sym | 20 |
7 files changed, 397 insertions, 0 deletions
diff --git a/ports/ChangeLog.m68k b/ports/ChangeLog.m68k index 25e7354..838a44e 100644 --- a/ports/ChangeLog.m68k +++ b/ports/ChangeLog.m68k @@ -1,3 +1,12 @@ +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. diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/Makefile b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/Makefile new file mode 100644 index 0000000..91bd358 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),stdlib) +gen-as-const-headers += ucontext_i.sym +endif diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/getcontext.S b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/getcontext.S new file mode 100644 index 0000000..4f31d2a --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/getcontext.S @@ -0,0 +1,63 @@ +/* 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) diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S new file mode 100644 index 0000000..a7048b1 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S @@ -0,0 +1,100 @@ +/* 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) diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/setcontext.S b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/setcontext.S new file mode 100644 index 0000000..a8d53a5 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/setcontext.S @@ -0,0 +1,94 @@ +/* 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) diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S new file mode 100644 index 0000000..b65aed8 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/swapcontext.S @@ -0,0 +1,108 @@ +/* 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) diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/ucontext_i.sym b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/ucontext_i.sym new file mode 100644 index 0000000..46bd4bf --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/ucontext_i.sym @@ -0,0 +1,20 @@ +#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) |