82 lines
2.1 KiB
ArmAsm
82 lines
2.1 KiB
ArmAsm
/* longjmp with sp check for C-SKY ABIV2.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.section .rodata.str1.8,"aMS",@progbits,1
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.align 2
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.type longjmp_msg,@object
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longjmp_msg:
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.string "longjmp causes uninitialized stack frame"
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.size longjmp_msg, .-longjmp_msg
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.text
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#define __longjmp ____longjmp_chk
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#ifdef __PIC__
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# define CALL_FAIL \
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subi sp, 8; \
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stw gb, (sp, 0); \
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grs gb, .Lgetpc1; \
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.Lgetpc1: \
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lrw t0, .Lgetpc1@GOTPC; \
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addu gb, gb, t0; \
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lrw a0, longjmp_msg@GOTOFF; \
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addu a0, a0, gb; \
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lrw t0, (HIDDEN_JUMPTARGET (__fortify_fail))@PLT; \
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ldr.w t0, (gb, t0 << 0); \
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jsr t0; \
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ldw gb, (sp, 0); \
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addi sp, 8;
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#else /* __PIC__ */
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# define CALL_FAIL \
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lrw a0, longjmp_msg; \
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jsri HIDDEN_JUMPTARGET (__fortify_fail);
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#endif /* __PIC__ */
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# define CHECK_SP(reg) \
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cmplt sp, reg; \
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bt .Lok1; \
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mov r9, a0; \
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mov t0, r7; \
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lrw r7, __NR_sigaltstack; \
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movi a0, 0; \
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subi sp, 12; /* sizeof (stack_t) */ \
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mov a1, sp; \
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trap 0; \
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mov r7, t0; \
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cmpnei a0, 0; \
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bt .Lok; \
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ldw a1, (sp, 4); \
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btsti a1, 1; \
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bt .Lfail; \
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ldw a1, (sp, 0); \
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ldw a3, (sp, 8); \
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add a1, a3; \
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sub a1, reg; \
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cmphs a1, a3; \
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bt .Lok; \
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.Lfail: \
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addi sp, 12; \
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CALL_FAIL \
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.Lok: \
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mov a0, r9; \
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.Lok1:
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#include <__longjmp.S>
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