mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
116 lines
3.0 KiB
ArmAsm
116 lines
3.0 KiB
ArmAsm
/* Copyright (C) 2012-2019 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 <rtld-global-offsets.h>
|
|
|
|
#include "ucontext_i.h"
|
|
|
|
.syntax unified
|
|
.text
|
|
|
|
/* int getcontext (ucontext_t *ucp) */
|
|
|
|
ENTRY(__getcontext)
|
|
/* No need to save r0-r3, d0-d7, or d16-d31. */
|
|
add r1, r0, #MCONTEXT_ARM_R4
|
|
stmia r1, {r4-r11}
|
|
|
|
/* Save R13 separately as Thumb can't STM it. */
|
|
str r13, [r0, #MCONTEXT_ARM_SP]
|
|
str r14, [r0, #MCONTEXT_ARM_LR]
|
|
/* Return to LR */
|
|
str r14, [r0, #MCONTEXT_ARM_PC]
|
|
/* Return zero */
|
|
mov r2, #0
|
|
str r2, [r0, #MCONTEXT_ARM_R0]
|
|
|
|
/* Save ucontext_t * across the next call. */
|
|
mov r4, r0
|
|
|
|
/* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
|
|
mov r0, #SIG_BLOCK
|
|
mov r1, #0
|
|
add r2, r4, #UCONTEXT_SIGMASK
|
|
bl PLTJMP(__sigprocmask)
|
|
|
|
/* Store FP regs. Much of the FP code is copied from arm/setjmp.S. */
|
|
|
|
#ifdef PIC
|
|
ldr r2, 1f
|
|
ldr r1, .Lrtld_global_ro
|
|
0: add r2, pc, r2
|
|
ldr r2, [r2, r1]
|
|
ldr r2, [r2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
|
|
#else
|
|
ldr r2, .Lhwcap
|
|
ldr r2, [r2, #0]
|
|
#endif
|
|
|
|
add r0, r4, #UCONTEXT_REGSPACE
|
|
|
|
#ifdef __SOFTFP__
|
|
tst r2, #HWCAP_ARM_VFP
|
|
beq .Lno_vfp
|
|
#endif
|
|
|
|
/* Store the VFP registers.
|
|
Don't use VFP instructions directly because this code
|
|
is used in non-VFP multilibs. */
|
|
/* Following instruction is vstmia r0!, {d8-d15}. */
|
|
stc p11, cr8, [r0], #64
|
|
/* Store the floating-point status register. */
|
|
/* Following instruction is vmrs r1, fpscr. */
|
|
mrc p10, 7, r1, cr1, cr0, 0
|
|
str r1, [r0], #4
|
|
.Lno_vfp:
|
|
|
|
tst r2, #HWCAP_ARM_IWMMXT
|
|
beq .Lno_iwmmxt
|
|
|
|
/* Save the call-preserved iWMMXt registers. */
|
|
/* Following instructions are wstrd wr10, [r0], #8 (etc.) */
|
|
stcl p1, cr10, [r0], #8
|
|
stcl p1, cr11, [r0], #8
|
|
stcl p1, cr12, [r0], #8
|
|
stcl p1, cr13, [r0], #8
|
|
stcl p1, cr14, [r0], #8
|
|
stcl p1, cr15, [r0], #8
|
|
.Lno_iwmmxt:
|
|
|
|
/* Restore the clobbered R4 and LR. */
|
|
ldr r14, [r4, #MCONTEXT_ARM_LR]
|
|
ldr r4, [r4, #MCONTEXT_ARM_R4]
|
|
|
|
mov r0, #0
|
|
|
|
DO_RET(r14)
|
|
|
|
END(__getcontext)
|
|
|
|
#ifdef PIC
|
|
1: .long _GLOBAL_OFFSET_TABLE_ - 0b - PC_OFS
|
|
.Lrtld_global_ro:
|
|
.long C_SYMBOL_NAME(_rtld_global_ro)(GOT)
|
|
#else
|
|
.Lhwcap:
|
|
.long C_SYMBOL_NAME(_dl_hwcap)
|
|
#endif
|
|
|
|
|
|
weak_alias(__getcontext, getcontext)
|