mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-04 16:50:13 +00:00
113 lines
3.2 KiB
ArmAsm
113 lines
3.2 KiB
ArmAsm
/* Copyright (C) 2001-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
|
|
|
|
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 <features.h>
|
|
|
|
#include "rtld-global-offsets.h"
|
|
#include "ucontext_i.h"
|
|
|
|
/* __getcontext (const ucontext_t *ucp)
|
|
|
|
Saves the machine context in UCP such that when it is activated,
|
|
it appears as if __getcontext() returned again.
|
|
|
|
This implementation is intended to be used for *synchronous* context
|
|
switches only. Therefore, it does not have to save anything
|
|
other than the PRESERVED state. */
|
|
|
|
ENTRY(__getcontext)
|
|
lr %r1,%r2
|
|
|
|
/* rt_sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask, sigsetsize). */
|
|
la %r2,SIG_BLOCK
|
|
slr %r3,%r3
|
|
la %r4,SC_MASK(%r1)
|
|
lhi %r5,_NSIG8
|
|
svc SYS_ify(rt_sigprocmask)
|
|
|
|
/* Store fpu context. */
|
|
stfpc SC_FPC(%r1)
|
|
std %f0,SC_FPRS(%r1)
|
|
std %f1,SC_FPRS+8(%r1)
|
|
std %f2,SC_FPRS+16(%r1)
|
|
std %f3,SC_FPRS+24(%r1)
|
|
std %f4,SC_FPRS+32(%r1)
|
|
std %f5,SC_FPRS+40(%r1)
|
|
std %f6,SC_FPRS+48(%r1)
|
|
std %f7,SC_FPRS+56(%r1)
|
|
std %f8,SC_FPRS+64(%r1)
|
|
std %f9,SC_FPRS+72(%r1)
|
|
std %f10,SC_FPRS+80(%r1)
|
|
std %f11,SC_FPRS+88(%r1)
|
|
std %f12,SC_FPRS+96(%r1)
|
|
std %f13,SC_FPRS+104(%r1)
|
|
std %f14,SC_FPRS+112(%r1)
|
|
std %f15,SC_FPRS+120(%r1)
|
|
|
|
lhi %r2,0
|
|
#ifndef __V1_UCONTEXT
|
|
bras %r3,0f
|
|
# ifdef IS_IN_rtld
|
|
/* Within ld.so we can do slightly better by addressing dl_hwap
|
|
relative to GOT start. */
|
|
1: .long _GLOBAL_OFFSET_TABLE_ - 1b
|
|
.long C_SYMBOL_NAME(_rtld_global_ro)@GOTOFF
|
|
0: l %r4,0(%r3)
|
|
la %r4,0(%r3,%r4)
|
|
l %r5,4(%r3)
|
|
/* _dl_hwcap is 64 bit and we need the lower 32. */
|
|
l %r3,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(%r4,%r5)
|
|
# elif PIC
|
|
1: .long _GLOBAL_OFFSET_TABLE_ - 1b
|
|
.long C_SYMBOL_NAME(_rtld_global_ro)@GOT
|
|
0: l %r4,0(%r3)
|
|
la %r4,0(%r3,%r4) /* GOT pointer -> r4 */
|
|
l %r5,4(%r3) /* GOT offset -> r5 */
|
|
l %r5,0(%r4,%r5) /* GOT slot -> r5 */
|
|
l %r3,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(%r5)
|
|
# else
|
|
.long C_SYMBOL_NAME(_dl_hwcap)
|
|
0: l %r3,0(%r3)
|
|
l %r3,0(%r3)
|
|
# endif
|
|
tml %r3,512 /* HWCAP_S390_HIGH_GPRS */
|
|
jz 2f
|
|
/* highgprs implies zarch so stmh/oill is ok here. */
|
|
.machine "z900"
|
|
.machinemode "zarch_nohighgprs"
|
|
stmh %r0,%r15,SC_HIGHGPRS(%r1)
|
|
oill %r2,1 /* UCONTEXT_UC_FLAGS_HIGH_GPRS */
|
|
#endif
|
|
2: st %r2,SC_FLGS(%r1)
|
|
|
|
/* Set __getcontext return value to 0. */
|
|
slr %r2,%r2
|
|
|
|
/* Store access registers. */
|
|
stam %a0,%a15,SC_ACRS(%r1)
|
|
|
|
/* Store general purpose registers. */
|
|
stm %r0,%r15,SC_GPRS(%r1)
|
|
|
|
/* Return. */
|
|
br %r14
|
|
END(__getcontext)
|
|
|
|
weak_alias (__getcontext, getcontext)
|