diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/setcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/setcontext.S | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/setcontext.S b/sysdeps/unix/sysv/linux/aarch64/setcontext.S deleted file mode 100644 index 3a82926ad3..0000000000 --- a/sysdeps/unix/sysv/linux/aarch64/setcontext.S +++ /dev/null @@ -1,130 +0,0 @@ -/* Set current context. - - Copyright (C) 2009-2017 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 "ucontext_i.h" -#include "ucontext-internal.h" - -/* int __setcontext (const ucontext_t *ucp) - - Restores the machine context in UCP and thereby resumes execution - in that context. - - This implementation is intended to be used for *synchronous* context - switches only. Therefore, it does not have to restore anything - other than the PRESERVED state. */ - - .text - -ENTRY (__setcontext) - DELOUSE (0) - /* Save a copy of UCP. */ - mov x9, x0 - - /* Set the signal mask with - rt_sigprocmask (SIG_SETMASK, mask, NULL, _NSIG/8). */ - mov x0, #SIG_SETMASK - add x1, x9, #UCONTEXT_SIGMASK - mov x2, #0 - mov x3, #_NSIG8 - mov x8, SYS_ify (rt_sigprocmask) - svc 0 - cbz x0, 1f - b C_SYMBOL_NAME (__syscall_error) -1: - /* Restore the general purpose registers. */ - mov x0, x9 - cfi_def_cfa (x0, 0) - cfi_offset (x18, oX0 + 18 * SZREG) - cfi_offset (x19, oX0 + 19 * SZREG) - cfi_offset (x20, oX0 + 20 * SZREG) - cfi_offset (x21, oX0 + 21 * SZREG) - cfi_offset (x22, oX0 + 22 * SZREG) - cfi_offset (x23, oX0 + 23 * SZREG) - cfi_offset (x24, oX0 + 24 * SZREG) - cfi_offset (x25, oX0 + 25 * SZREG) - cfi_offset (x26, oX0 + 26 * SZREG) - cfi_offset (x27, oX0 + 27 * SZREG) - cfi_offset (x28, oX0 + 28 * SZREG) - cfi_offset (x29, oX0 + 29 * SZREG) - cfi_offset (x30, oX0 + 30 * SZREG) - - cfi_offset ( d8, oV0 + 8 * SZVREG) - cfi_offset ( d9, oV0 + 9 * SZVREG) - cfi_offset (d10, oV0 + 10 * SZVREG) - cfi_offset (d11, oV0 + 11 * SZVREG) - cfi_offset (d12, oV0 + 12 * SZVREG) - cfi_offset (d13, oV0 + 13 * SZVREG) - cfi_offset (d14, oV0 + 14 * SZVREG) - cfi_offset (d15, oV0 + 15 * SZVREG) - ldp x18, x19, [x0, oX0 + 18 * SZREG] - ldp x20, x21, [x0, oX0 + 20 * SZREG] - ldp x22, x23, [x0, oX0 + 22 * SZREG] - ldp x24, x25, [x0, oX0 + 24 * SZREG] - ldp x26, x27, [x0, oX0 + 26 * SZREG] - ldp x28, x29, [x0, oX0 + 28 * SZREG] - ldr x30, [x0, oX0 + 30 * SZREG] - ldr x2, [x0, oSP] - mov sp, x2 - - /* Check for FP SIMD context. We don't support restoring - contexts created by the kernel, so this context must have - been created by getcontext. Hence we can rely on the - first extension block being the FP SIMD context. */ - add x2, x0, #oEXTENSION - - mov w3, #(FPSIMD_MAGIC & 0xffff) - movk w3, #(FPSIMD_MAGIC >> 16), lsl #16 - ldr w1, [x2, #oHEAD + oMAGIC] - cmp w1, w3 - b.ne 2f - - /* Restore the FP SIMD context. */ - add x3, x2, #oV0 + 8 * SZVREG - ldp q8, q9, [x3], #2 * SZVREG - ldp q10, q11, [x3], #2 * SZVREG - ldp q12, q13, [x3], #2 * SZVREG - ldp q14, q15, [x3], #2 * SZVREG - - add x3, x2, oFPSR - - ldr w4, [x3] - msr fpsr, x4 - - ldr w4, [x3, oFPCR - oFPSR] - msr fpcr, x4 - -2: - ldr x16, [x0, oPC] - /* Restore arg registers. */ - ldp x2, x3, [x0, oX0 + 2 * SZREG] - ldp x4, x5, [x0, oX0 + 4 * SZREG] - ldp x6, x7, [x0, oX0 + 6 * SZREG] - ldp x0, x1, [x0, oX0 + 0 * SZREG] - /* Jump to the new pc value. */ - br x16 -PSEUDO_END (__setcontext) -weak_alias (__setcontext, setcontext) - -ENTRY (__startcontext) - mov x0, x19 - cbnz x0, __setcontext -1: b HIDDEN_JUMPTARGET (exit) -END (__startcontext) |