48 lines
1.5 KiB
ArmAsm
48 lines
1.5 KiB
ArmAsm
/* longjmp that validates stack addresses. ARM/NaCl version.
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Copyright (C) 2015-2017 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.str1.1,"aMS",%progbits,1
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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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/* We don't have sigaltstack and so any longjmp must be to an outer frame. */
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.macro check_sp reg
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cmp sp, \reg
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bls .Lok
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#ifdef PIC
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movw r0, #:lower16:longjmp_msg-(.LPIC0+8)
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movt r0, #:upper16:longjmp_msg-(.LPIC0+8)
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.LPIC0: add r0, r0, pc
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#else
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movw r0, #:lower16:longjmp_msg
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movt r0, #:upper16:longjmp_msg
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#endif
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b HIDDEN_JUMPTARGET(__fortify_fail)
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.Lok:
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.endm
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#define CHECK_SP(reg) check_sp reg
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#define __longjmp ____longjmp_chk
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#include <__longjmp.S>
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