diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/hppa/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/hppa/getcontext.S | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/hppa/getcontext.S b/sysdeps/unix/sysv/linux/hppa/getcontext.S new file mode 100644 index 0000000000..1d17d30f4f --- /dev/null +++ b/sysdeps/unix/sysv/linux/hppa/getcontext.S @@ -0,0 +1,165 @@ +/* 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) |