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91 lines
2.3 KiB
ArmAsm
91 lines
2.3 KiB
ArmAsm
/* Copyright (C) 2009-2024 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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<https://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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#define __longjmp ____longjmp_chk
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#ifdef PIC
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# define CALL_FAIL \
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ldr sl, .L_GOT; \
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cfi_undefined (sl); \
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.L_GOT_OFF: \
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add sl, pc, sl; \
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ldr r0, .Lstr; \
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add r0, sl, r0; \
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B PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail)); \
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.L_GOT: \
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.word _GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8); \
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.Lstr: \
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.word longjmp_msg(GOTOFF);
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#else
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# define CALL_FAIL \
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ldr r0, .Lstr; \
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B HIDDEN_JUMPTARGET(__fortify_fail); \
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.Lstr: \
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.word longjmp_msg;
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#endif
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#define CHECK_SP(reg) \
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cfi_remember_state; \
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cmp sp, reg; \
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bls .Lok; \
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push { r7 }; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r7, 0); \
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mov r5, r0; \
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cfi_undefined (r5); \
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mov r7, #SYS_ify(sigaltstack); \
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mov r0, #0; \
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sub sp, sp, #12; /* == sizeof (stack_t) */ \
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cfi_adjust_cfa_offset (12); \
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cfi_remember_state; \
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mov r1, sp; \
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swi #0; \
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cmp r0, #0; \
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bne .Lok2; \
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ldr r1, [sp, #4]; \
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tst r1, #1; \
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beq .Lfail; \
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ldr r2, [sp, #0]; \
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ldr r3, [sp, #8]; \
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add r2, r2, r3; \
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sub r2, r2, reg; \
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cmp r3, r2; \
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bls .Lok2; \
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.Lfail: \
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add sp, sp, #12; \
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cfi_adjust_cfa_offset (-12); \
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pop { r7 }; \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (r7); \
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CALL_FAIL \
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cfi_restore_state; \
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.Lok2: \
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mov r0, r5; \
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cfi_restore_state; \
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.Lok:
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#include <__longjmp.S>
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