path: root/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S

/* Save current context and install the given one.
   Copyright (C) 2002-2025 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
   <https://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <rtld-global-offsets.h>
#include <shlib-compat.h>

#define __ASSEMBLY__
#include <asm/ptrace.h>
#include "ucontext_i.h"
#include <asm/errno.h>

	.section	".toc","aw"
.LC__dl_hwcap:
#ifdef SHARED
	.tc _rtld_global_ro[TC],_rtld_global_ro
#else
	.tc _dl_hwcap[TC],_dl_hwcap
#endif

#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
	.section	".text"
ENTRY(__novec_swapcontext)
	CALL_MCOUNT 2
  std  r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
  std  r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
  mflr  r0
  std   r31,-16(1)
  cfi_offset(r31,-16)
#ifdef __ROP_PROTECT__
  hashst  r0,FRAME_ROP_SAVE(r1)
#endif
  std  r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
  std  r0,FRAME_LR_SAVE(r1)
  cfi_offset (lr, FRAME_LR_SAVE)
  std  r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
  std  r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
  stdu  r1,-128(r1)
  cfi_adjust_cfa_offset (128)
  std  r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
  std  r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
  std  r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
  std  r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
  std  r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
  std  r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
  std  r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
  std  r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
  std  r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
  std  r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
  std  r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
  std  r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
  std  r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
  std  r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
  std