| /* Get current user context. |
| Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Helge Deller <deller@gmx.de>, 2008. |
| |
| 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" |
| |
| |
| /* Trampoline function. Non-standard calling ABI. */ |
| /* Can not use ENTRY(__getcontext_ret) here. */ |
| .type __getcontext_ret, @function |
| .hidden __getcontext_ret |
| __getcontext_ret: |
| .proc |
| .callinfo FRAME=0,NO_CALLS |
| /* r26-r23 contain original r3-r6, but because setcontext |
| does not reload r3-r6 (it's using them as temporaries) |
| we must save them elsewhere and swap them back in. */ |
| copy %r23, %r3 |
| copy %r24, %r4 |
| copy %r25, %r5 |
| copy %r26, %r6 |
| /* r20 contains original return pointer. */ |
| bv 0(%r20) |
| copy %r0, %ret0 |
| .procend |
| .size __getcontext_ret, .-__getcontext_ret |
| |
| |
| ENTRY(__getcontext) |
| /* Save the registers. */ |
| stw %r0, oR0(%r26) |
| stw %r1, oR1(%r26) |
| /* stw %r2, oR2(%r26) - used for trampoline. */ |
| stw %r3, oR3(%r26) |
| stw %r4, oR4(%r26) |
| stw %r5, oR5(%r26) |
| stw %r6, oR6(%r26) |
| stw %r7, oR7(%r26) |
| stw %r8, oR8(%r26) |
| stw %r9, oR9(%r26) |
| stw %r10, oR10(%r26) |
| stw %r11, oR11(%r26) |
| stw %r12, oR12(%r26) |
| stw %r13, oR13(%r26) |
| stw %r14, oR14(%r26) |
| stw %r15, oR15(%r26) |
| stw %r16, oR16(%r26) |
| stw %r17, oR17(%r26) |
| stw %r18, oR18(%r26) |
| stw %r19, oR19(%r26) |
| /* stw %r20, oR20(%r26) - used for trampoline. */ |
| stw %r21, oR21(%r26) |
| stw %r22, oR22(%r26) |
| /* stw %r23, oR23(%r26) - used for trampoline. */ |
| /* stw %r24, oR24(%r26) - used for trampoline. */ |
| /* stw %r25, oR25(%r26) - used for trampoline. */ |
| /* stw %r26, oR26(%r26) - used for trampoline. */ |
| stw %r27, oR27(%r26) |
| stw %r28, oR28(%r26) |
| stw %r29, oR29(%r26) |
| stw %sp, oR30(%r26) |
| stw %r31, oR31(%r26) |
| |
| stw %r0, oUC_FLAGS(%r26) |
| /* stw %r0, oUC_LINK(%r26) - Do not overwrite. */ |
| stw %sp, oSS_SP(%r26) |
| stw %r0, oSS_FLAGS(%r26) |
| stw %r0, oSS_SIZE(%r26) |
| |
| stw %r0, oSC_FLAGS(%r26) |
| |
| stw %r0, oIASQ0(%r26) |
| stw %r0, oIASQ1(%r26) |
| stw %r0, oIAOQ0(%r26) |
| stw %r0, oIAOQ1(%r26) |
| stw %r0, oSAR(%r26) /* used as flag in swapcontext(). */ |
| |
| |
| /* Store floating-point regs. */ |
| ldo oFPREGS0(%r26),%r1 |
| fstds,ma %fr0, 8(%r1) |
| fstds,ma %fr1, 8(%r1) |
| fstds,ma %fr2, 8(%r1) |
| fstds,ma %fr3, 8(%r1) |
| fstds,ma %fr4, 8(%r1) |
| fstds,ma %fr5, 8(%r1) |
| fstds,ma %fr6, 8(%r1) |
| fstds,ma %fr7, 8(%r1) |
| fstds,ma %fr8, 8(%r1) |
| fstds,ma %fr9, 8(%r1) |
| fstds,ma %fr10, 8(%r1) |
| fstds,ma %fr11, 8(%r1) |
| fstds,ma %fr12, 8(%r1) |
| fstds,ma %fr13, 8(%r1) |
| fstds,ma %fr14, 8(%r1) |
| fstds,ma %fr15, 8(%r1) |
| fstds,ma %fr16, 8(%r1) |
| fstds,ma %fr17, 8(%r1) |
| fstds,ma %fr18, 8(%r1) |
| fstds,ma %fr19, 8(%r1) |
| fstds,ma %fr20, 8(%r1) |
| fstds,ma %fr21, 8(%r1) |
| fstds,ma %fr22, 8(%r1) |
| fstds,ma %fr23, 8(%r1) |
| fstds,ma %fr24, 8(%r1) |
| fstds,ma %fr25, 8(%r1) |
| fstds,ma %fr26, 8(%r1) |
| fstds,ma %fr27, 8(%r1) |
| fstds,ma %fr28, 8(%r1) |
| fstds,ma %fr29, 8(%r1) |
| fstds,ma %fr30, 8(%r1) |
| fstds %fr31, 0(%r1) |
| |
| /* Prologue */ |
| stwm %r4, 64(%sp) |
| #ifdef PIC |
| stw %r19, -32(%sp) |
| #endif |
| |
| /* Set up the trampoline registers. |
| r20, r23, r24, r25, r26 and r2 are clobbered |
| by call to getcontext() anyway. Reuse them. */ |
| stw %r2, oR20(%r26) |
| stw %r3, oR23(%r26) |
| stw %r4, oR24(%r26) |
| stw %r5, oR25(%r26) |
| stw %r6, oR26(%r26) |
| ldil L%__getcontext_ret, %r1 |
| ldo R%__getcontext_ret(%r1), %r1 |
| stw %r1, oR2(%r26) |
| |
| /* Save the current signal mask. */ |
| /* sigprocmask(SIG_BLOCK, NULL, &ucp->uc_sigmask); */ |
| ldo oSIGMASK(%r26), %r24 |
| copy %r0, %r25 |
| bl sigprocmask, %r2 |
| ldi SIG_BLOCK, %r26 |
| |
| /* Epilogue */ |
| ldw -84(%sp), %r2 |
| #ifdef PIC |
| ldw -96(%sp), %r19 |
| #endif |
| bv %r0(%r2) |
| ldwm -64(%sp), %r4 |
| END(__getcontext) |
| |
| weak_alias (__getcontext, getcontext) |
