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/* longjmp with sp check for C-SKY ABIV2.
Copyright (C) 2018-2021 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>
.section .rodata.str1.8,"aMS",@progbits,1
.align 2
.type longjmp_msg,@object
longjmp_msg:
.string "longjmp causes uninitialized stack frame"
.size longjmp_msg, .-longjmp_msg
.text
#define __longjmp ____longjmp_chk
#ifdef __PIC__
# define CALL_FAIL \
subi sp, 8; \
stw gb, (sp, 0); \
grs gb, .Lgetpc1; \
.Lgetpc1: \
lrw t0, .Lgetpc1@GOTPC; \
addu gb, gb, t0; \
lrw a0, longjmp_msg@GOTOFF; \
addu a0, a0, gb; \
lrw t0, (HIDDEN_JUMPTARGET (__fortify_fail))@PLT; \
ldr.w t0, (gb, t0 << 0); \
jsr t0; \
ldw gb, (sp, 0); \
addi sp, 8;
#else /* __PIC__ */
# define CALL_FAIL \
lrw a0, longjmp_msg; \
jsri HIDDEN_JUMPTARGET (__fortify_fail);
#endif /* __PIC__ */
# define CHECK_SP(reg) \
cmplt sp, reg; \
bt .Lok1; \
mov r9, a0; \
mov t0, r7; \
lrw r7, __NR_sigaltstack; \
movi a0, 0; \
subi sp, 12; /* sizeof (stack_t) */ \
mov a1, sp; \
trap 0; \
mov r7, t0; \
cmpnei a0, 0; \
bt .Lok; \
ldw a1, (sp, 4); \
btsti a1, 1; \
bt .Lfail; \
ldw a1, (sp, 0); \
ldw a3, (sp, 8); \
add a1, a3; \
sub a1, reg; \
cmphs a1, a3; \
bt .Lok; \
.Lfail: \
addi sp, 12; \
CALL_FAIL \
.Lok: \
mov a0, r9; \
.Lok1:
#include <__longjmp.S>
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