diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/getcontext.S | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/getcontext.S b/sysdeps/unix/sysv/linux/aarch64/getcontext.S deleted file mode 100644 index fa7074c590..0000000000 --- a/sysdeps/unix/sysv/linux/aarch64/getcontext.S +++ /dev/null @@ -1,109 +0,0 @@ -/* Save 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 getcontext (ucontext_t *ucp) - - Returns 0 on success -1 and errno on failure. - */ - - .text - -ENTRY(__getcontext) - DELOUSE (0) - /* The saved context will return to the getcontext() call point - with a return value of 0 */ - str xzr, [x0, oX0 + 0 * SZREG] - - stp x18, x19, [x0, oX0 + 18 * SZREG] - stp x20, x21, [x0, oX0 + 20 * SZREG] - stp x22, x23, [x0, oX0 + 22 * SZREG] - stp x24, x25, [x0, oX0 + 24 * SZREG] - stp x26, x27, [x0, oX0 + 26 * SZREG] - stp x28, x29, [x0, oX0 + 28 * SZREG] - str x30, [x0, oX0 + 30 * SZREG] - - /* Place LR into the saved PC, this will ensure that when - switching to this saved context with setcontext() control - will pass back to the caller of getcontext(), we have - already arrange to return the appropriate return value in x0 - above. */ - str x30, [x0, oPC] - - /* Save the current SP */ - mov x2, sp - str x2, [x0, oSP] - - /* Initialize the pstate. */ - str xzr, [x0, oPSTATE] - - /* Figure out where to place the first context extension - block. */ - add x2, x0, #oEXTENSION - - /* Write the context extension fpsimd header. */ - mov w3, #(FPSIMD_MAGIC & 0xffff) - movk w3, #(FPSIMD_MAGIC >> 16), lsl #16 - str w3, [x2, #oHEAD + oMAGIC] - mov w3, #FPSIMD_CONTEXT_SIZE - str w3, [x2, #oHEAD + oSIZE] - - /* Fill in the FP SIMD context. */ - add x3, x2, #oV0 + 8 * SZVREG - stp q8, q9, [x3], # 2 * SZVREG - stp q10, q11, [x3], # 2 * SZVREG - stp q12, q13, [x3], # 2 * SZVREG - stp q14, q15, [x3], # 2 * SZVREG - - add x3, x2, oFPSR - - mrs x4, fpsr - str w4, [x3] - - mrs x4, fpcr - str w4, [x3, oFPCR - oFPSR] - - /* Write the termination context extension header. */ - add x2, x2, #FPSIMD_CONTEXT_SIZE - - str xzr, [x2, #oHEAD + oMAGIC] - str xzr, [x2, #oHEAD + oSIZE] - - /* Grab the signal mask */ - /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ - add PTR_REG (2), PTR_REG (0), #UCONTEXT_SIGMASK - mov x0, SIG_BLOCK - mov x1, 0 - mov x3, _NSIG8 - mov x8, SYS_ify (rt_sigprocmask) - svc 0 - cbnz x0, 1f - - /* Return 0 for success */ - mov x0, 0 - RET -1: - b C_SYMBOL_NAME(__syscall_error) - - PSEUDO_END (__getcontext) -weak_alias (__getcontext, getcontext) |