3785b31c16
When adding/updating localplt.data for various architectures to get the compilation tests passing everywhere, I generally made it reflect the existing state of what local PLT entries were actually seen, rather than an ideal state with as few as possible such entries, mainly for functions that are intended to be interposable. This patch eliminates some local PLT entries for hppa by using __sigprocmask instead of sigprocmask in getcontext and setcontext. The specific case of sigprocmask called by setcontext is the third of four items in bug 18124 (the other three have already been fixed for 2.26 or earlier releases). Note that hppa-specific localplt.data entries for __sigsetjmp, _IO_funlockfile and __errno_location remain, but the causes / fixes are less immediately obvious from source inspection. Tested (compilation tests only) with build-many-glibcs.py for hppa-linux-gnu. [BZ #18124] * sysdeps/hppa/bsd-setjmp.S: Include <sysdep.h>. (setjmp): Use HIDDEN_JUMPTARGET with __sigsetjmp. * sysdeps/unix/sysv/linux/hppa/getcontext.S (__getcontext): Call __sigprocmask instead of sigprocmask. * sysdeps/unix/sysv/linux/hppa/setcontext.S (__setcontext): Likewise. * sysdeps/unix/sysv/linux/hppa/localplt.data: Remove entries for __sigsetjmp and sigprocmask.
176 lines
4.4 KiB
ArmAsm
176 lines
4.4 KiB
ArmAsm
/* Get current user context.
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Copyright (C) 2008-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Helge Deller <deller@gmx.de>, 2008.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "ucontext_i.h"
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/* Trampoline function. Non-standard calling ABI. */
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/* Can not use ENTRY(__getcontext_ret) here. */
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.type __getcontext_ret, @function
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.hidden __getcontext_ret
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__getcontext_ret:
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.proc
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.callinfo FRAME=0,NO_CALLS
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/* r26-r23 contain original r3-r6, but because setcontext
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does not reload r3-r6 (it's using them as temporaries)
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we must save them elsewhere and swap them back in. */
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copy %r23, %r3
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copy %r24, %r4
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copy %r25, %r5
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copy %r26, %r6
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/* r20 contains original return pointer. */
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bv 0(%r20)
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copy %r0, %ret0
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.procend
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.size __getcontext_ret, .-__getcontext_ret
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ENTRY(__getcontext)
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/* Save the registers. */
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stw %r0, oR0(%r26)
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stw %r1, oR1(%r26)
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/* stw %r2, oR2(%r26) - used for trampoline. */
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stw %r3, oR3(%r26)
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stw %r4, oR4(%r26)
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stw %r5, oR5(%r26)
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stw %r6, oR6(%r26)
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stw %r7, oR7(%r26)
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stw %r8, oR8(%r26)
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stw %r9, oR9(%r26)
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stw %r10, oR10(%r26)
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stw %r11, oR11(%r26)
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stw %r12, oR12(%r26)
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stw %r13, oR13(%r26)
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stw %r14, oR14(%r26)
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stw %r15, oR15(%r26)
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stw %r16, oR16(%r26)
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stw %r17, oR17(%r26)
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stw %r18, oR18(%r26)
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stw %r19, oR19(%r26)
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/* stw %r20, oR20(%r26) - used for trampoline. */
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stw %r21, oR21(%r26)
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stw %r22, oR22(%r26)
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/* stw %r23, oR23(%r26) - used for trampoline. */
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/* stw %r24, oR24(%r26) - used for trampoline. */
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/* stw %r25, oR25(%r26) - used for trampoline. */
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/* stw %r26, oR26(%r26) - used for trampoline. */
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stw %r27, oR27(%r26)
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stw %r28, oR28(%r26)
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stw %r29, oR29(%r26)
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stw %sp, oR30(%r26)
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stw %r31, oR31(%r26)
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stw %r0, oUC_FLAGS(%r26)
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/* stw %r0, oUC_LINK(%r26) - Do not overwrite. */
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stw %sp, oSS_SP(%r26)
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stw %r0, oSS_FLAGS(%r26)
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stw %r0, oSS_SIZE(%r26)
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stw %r0, oSC_FLAGS(%r26)
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stw %r0, oIASQ0(%r26)
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stw %r0, oIASQ1(%r26)
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stw %r0, oIAOQ0(%r26)
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stw %r0, oIAOQ1(%r26)
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stw %r0, oSAR(%r26) /* used as flag in swapcontext(). */
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/* Store floating-point regs. */
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ldo oFPREGS0(%r26),%r1
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fstds,ma %fr0, 8(%r1)
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fstds,ma %fr1, 8(%r1)
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fstds,ma %fr2, 8(%r1)
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fstds,ma %fr3, 8(%r1)
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fstds,ma %fr4, 8(%r1)
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fstds,ma %fr5, 8(%r1)
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fstds,ma %fr6, 8(%r1)
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fstds,ma %fr7, 8(%r1)
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fstds,ma %fr8, 8(%r1)
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fstds,ma %fr9, 8(%r1)
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fstds,ma %fr10, 8(%r1)
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fstds,ma %fr11, 8(%r1)
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fstds,ma %fr12, 8(%r1)
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fstds,ma %fr13, 8(%r1)
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fstds,ma %fr14, 8(%r1)
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fstds,ma %fr15, 8(%r1)
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fstds,ma %fr16, 8(%r1)
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fstds,ma %fr17, 8(%r1)
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fstds,ma %fr18, 8(%r1)
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fstds,ma %fr19, 8(%r1)
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fstds,ma %fr20, 8(%r1)
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fstds,ma %fr21, 8(%r1)
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fstds,ma %fr22, 8(%r1)
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fstds,ma %fr23, 8(%r1)
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fstds,ma %fr24, 8(%r1)
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fstds,ma %fr25, 8(%r1)
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fstds,ma %fr26, 8(%r1)
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fstds,ma %fr27, 8(%r1)
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fstds,ma %fr28, 8(%r1)
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fstds,ma %fr29, 8(%r1)
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fstds,ma %fr30, 8(%r1)
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fstds %fr31, 0(%r1)
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/* Prologue */
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stw %r2, -20(%sp)
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.cfi_offset 2, -20
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stwm %r4, 64(%sp)
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.cfi_def_cfa_offset -64
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.cfi_offset 4, 0
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#ifdef PIC
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stw %r19, -32(%sp)
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.cfi_offset 19, 32
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#endif
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/* Set up the trampoline registers.
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r20, r23, r24, r25, r26 and r2 are clobbered
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by call to getcontext() anyway. Reuse them. */
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stw %r2, oR20(%r26)
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stw %r3, oR23(%r26)
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stw %r4, oR24(%r26)
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stw %r5, oR25(%r26)
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stw %r6, oR26(%r26)
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#ifdef PIC
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addil LT%__getcontext_ret, %r19
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ldw RT%__getcontext_ret(%r1), %r1
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#else
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ldil L%__getcontext_ret, %r1
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ldo R%__getcontext_ret(%r1), %r1
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#endif
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stw %r1, oR2(%r26)
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/* Save the current signal mask. */
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/* sigprocmask(SIG_BLOCK, NULL, &ucp->uc_sigmask); */
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ldo oSIGMASK(%r26), %r24
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copy %r0, %r25
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bl __sigprocmask, %r2
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ldi SIG_BLOCK, %r26
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/* Epilogue */
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ldw -84(%sp), %r2
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#ifdef PIC
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ldw -32(%sp), %r19
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#endif
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bv %r0(%r2)
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ldwm -64(%sp), %r4
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END(__getcontext)
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weak_alias (__getcontext, getcontext)
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