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/* Save current context, powerpc32 common.
Copyright (C) 2005-2025 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/>. */
/* This is the common implementation of getcontext for powerpc32.
It not complete in itself should be included in to a framework that
defines:
__CONTEXT_FUNC_NAME
and if appropriate:
__CONTEXT_ENABLE_FPRS
__CONTEXT_ENABLE_VRS
Any architecture that implements the Vector unit is assumed to also
implement the floating unit. */
/* Stack frame offsets. */
#define _FRAME_BACKCHAIN 0
#define _FRAME_LR_SAVE 4
#define _FRAME_PARM_SAVE1 8
#define _FRAME_PARM_SAVE2 12
#define _FRAME_PARM_SAVE3 16
#define _FRAME_PARM_SAVE4 20
#ifdef __CONTEXT_ENABLE_VRS
.machine "altivec"
#endif
ENTRY(__CONTEXT_FUNC_NAME)
stwu r1,-16(r1)
cfi_adjust_cfa_offset (16)
/* Insure that the _UC_REGS start on a quadword boundary. */
stw r3,_FRAME_PARM_SAVE1(r1)
addi r3,r3,_UC_REG_SPACE+12
clrrwi r3,r3,4
/* Save the general purpose registers */
stw r0,_UC_GREGS+(PT_R0*4)(r3)
mflr r0
stw r2,_UC_GREGS+(PT_R2*4)(r3)
stw r4,_UC_GREGS+(PT_R4*4)(r3)
/* Set the callers LR_SAVE, and the ucontext LR and NIP to the callers
return address. */
stw r0,_UC_GREGS+(PT_LNK*4)(r3)
stw r0,_UC_GREGS+(PT_NIP*4)(r3)
stw r0,_FRAME_LR_SAVE+16(r1)
cfi_offset (lr, _FRAME_LR_SAVE)
stw r5,_UC_GREGS+(PT_R5*4)(r3)
stw r6,_UC_GREGS+(PT_R6*4)(r3)
stw r7,_UC_GREGS+(PT_R7*4)(r3)
stw r8,_UC_GREGS+(PT_R8*4)(r3)
stw r9,_UC_GREGS+(PT_R9*4)(r3)
stw r10,_UC_GREGS+(PT_R10*4)(r3)
stw r11,_UC_GREGS+(PT_R11*4)(r3)
stw r12,_UC_GREGS+(PT_R12*4)(r3)
stw r13,_UC_GREGS+(PT_R13*4)(r3)
stw r14,_UC_GREGS+(PT_R14*4)(r3)
stw r15,_UC_GREGS+(PT_R15*4)(r3)
stw r16,_UC_GREGS+(PT_R16*4)(r3)
stw r17,_UC_GREGS+(PT_R17*4)(r3)
stw r18,_UC_GREGS+(PT_R18*4)(r3)
stw r19,_UC_GREGS+(PT_R19*4)(r3)
stw r20,_UC_GREGS+(PT_R20*4)(r3)
stw r21,_UC_GREGS+(PT_R21*4)(r3)
stw r22,_UC_GREGS+(PT_R22*4)(r3)
stw r23,_UC_GREGS+(PT_R23*4)(r3)
stw r24,_UC_GREGS+(PT_R24*4)(r3)
stw r25,_UC_GREGS+(PT_R25*4)(r3)
stw r26,_UC_GREGS+(PT_R26*4)(r3)
stw r27,_UC_GREGS+(PT_R27*4)(r3)
stw r28,_UC_GREGS+(PT_R28*4)(r3)
stw r29,_UC_GREGS+(PT_R29*4)(r3)
stw r30,_UC_GREGS+(PT_R30*4)(r3)
stw r31,_UC_GREGS+(PT_R31*4)(r3)
/* Save the value of R1. We had to push the stack before we
had the address of uc_reg_space. So compute the address of
the callers stack pointer and save it as R1. */
addi r8,r1,16
li r0,0
/* Save the
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