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123 lines
3.4 KiB
ArmAsm
123 lines
3.4 KiB
ArmAsm
/* Copyright (C) 2009-2014 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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#include <sigaltstack-offsets.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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mov.l .Lfail, r1; \
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mov.l .Lstr, r4; \
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mov.l r12, @-r15; \
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cfi_remember_state; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r12, 0); \
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mova .Lgot, r0; \
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mov.l .Lgot, r12; \
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add r0, r12; \
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sts.l pr, @-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (pr, 0); \
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bsrf r1; \
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add r12, r4; \
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.Lfail0: \
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/* Unreachable. */ \
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.align 2; \
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.Lgot: \
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.long _GLOBAL_OFFSET_TABLE_; \
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.Lstr: \
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.long longjmp_msg@GOTOFF; \
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.Lfail: \
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.long __GI___fortify_fail@PLT-(.Lfail0-.); \
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cfi_restore_state;
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#else
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# define CALL_FAIL \
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mov.l .Lfail, r1; \
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mov.l .Lstr, r4; \
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sts.l pr, @-r15; \
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cfi_remember_state; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (pr, 0); \
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jsr @r1; \
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nop; \
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/* Unreachable. */ \
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.align 2; \
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.Lstr: \
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.long longjmp_msg; \
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.Lfail: \
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.long __fortify_fail; \
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cfi_restore_state;
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#endif
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#define CHECK_SP(reg) \
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/* Jumping to a higher-address frame is always allowed. */ \
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cmp/hs r15, reg; \
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bt .Lok; \
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\
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mov.l r0, @-r15; /* The return value is already in here. */ \
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cfi_adjust_cfa_offset (4); \
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mov.l r1, @-r15; /* PTR_DEMANGLE helper. */ \
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cfi_adjust_cfa_offset (4); \
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mov.l r2, @-r15; /* The new SP value is already in here. */ \
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cfi_adjust_cfa_offset (4); \
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mov.l r4, @-r15; /* We'll still need this one. */ \
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cfi_adjust_cfa_offset (4); \
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add #-sizeSS, r15; \
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cfi_adjust_cfa_offset (sizeSS); \
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mov #0, r4; \
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mov r15, r5; \
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DO_CALL (sigaltstack, 2); \
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/* Without working sigaltstack we cannot perform the test. */ \
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tst r0, r0; \
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bf .Lok2; \
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mov.l @(oSS_FLAGS, r15), r0; \
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tst #SS_ONSTACK, r0; \
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bt .Lcall_fail; \
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mov.l @(oSS_SIZE, r15), r2; \
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mov.l @(oSS_SP, r15), r1; \
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add r2, r1; \
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sub r8, r1; \
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cmp/hi r1, r2; \
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bf .Lok2; \
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.Lcall_fail: \
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CALL_FAIL \
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\
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.Lok2: \
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add #sizeSS, r15; \
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cfi_adjust_cfa_offset (-sizeSS); \
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mov.l @r15+, r4; \
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cfi_adjust_cfa_offset (-4); \
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mov.l @r15+, r2; \
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cfi_adjust_cfa_offset (-4); \
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mov.l @r15+, r1; \
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cfi_adjust_cfa_offset (-4); \
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mov.l @r15+, r0; \
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cfi_adjust_cfa_offset (-4); \
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.Lok:
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#include <__longjmp.S>
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