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688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
91 lines
2.3 KiB
ArmAsm
91 lines
2.3 KiB
ArmAsm
/* Copyright (C) 2009-2018 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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/* longjmp is implemented in terms of the setcontext trap on Linux/Sparc64. */
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#include <sysdep.h>
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/* Offsets into the jmp_buf structure. */
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#define O_mask_was_saved 512
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#define O_gregs 32
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#define O_g1 (O_gregs + 4*8)
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#define O_sp (O_gregs + 17*8)
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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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ENTRY (____longjmp_chk)
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ldx [%o0 + O_sp], %o2
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cmp %sp, %o2
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bleu,pt %xcc, .Lok
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nop
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save %sp, -208, %sp
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cfi_remember_state
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cfi_def_cfa_register(%fp)
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cfi_window_save
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cfi_register(%o7, %i7)
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add %fp, 2023, %o1
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clr %o0
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LOADSYSCALL(sigaltstack)
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ta 0x6d
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bcs,pn %xcc, .Lok2
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lduw [%fp + 2031], %l2
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andcc %l2, 0x1, %g0
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be,pn %xcc, .Lfail
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ldx [%fp + 2023], %l0
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ldx [%fp + 2039], %l1
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sub %l0, STACK_BIAS, %l0
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add %l0, %l1, %l0
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sub %l0, %i2, %l0
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cmp %l0, %l1
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bgeu,pt %xcc, .Lok2
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nop
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.Lfail:
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#ifndef PIC
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sethi %hi(longjmp_msg), %o0
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or %o0, %lo(longjmp_msg), %o0
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#else
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SETUP_PIC_REG(l7)
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sethi %gdop_hix22(longjmp_msg), %o0
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xor %o0, %gdop_lox10(longjmp_msg), %o0
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ldx [%l7 + %o0], %o0, %gdop(longjmp_msg)
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#endif
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call HIDDEN_JUMPTARGET(__fortify_fail)
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nop
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.Lok2: restore
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cfi_restore_state
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.Lok:
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/* Modify the context with the value we want to return. */
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movre %o1, 1, %o1
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stx %o1, [%o0 + O_g1]
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/* Let setcontext know if we want to modify the current sigmask. */
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ld [%o0 + O_mask_was_saved], %o1
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/* And bamf back to where we belong! */
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ta 0x6f
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END(____longjmp_chk)
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