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1/* Copyright (C) 2009-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <sysdep.h>
19
20#include <sigaltstack-offsets.h>
21
22 .section .rodata.str1.1,"aMS",@progbits,1
23 .type longjmp_msg,@object
24longjmp_msg:
25 .string "longjmp causes uninitialized stack frame"
26 .size longjmp_msg, .-longjmp_msg
27 .text
28
29#define __longjmp ____longjmp_chk
30
31#ifdef PIC
32# define CALL_FAIL \
33 mov.l .Lfail, r1; \
34 mov.l .Lstr, r4; \
35 mov.l r12, @-r15; \
36 cfi_remember_state; \
37 cfi_adjust_cfa_offset (4); \
38 cfi_rel_offset (r12, 0); \
39 mova .Lgot, r0; \
40 mov.l .Lgot, r12; \
41 add r0, r12; \
42 sts.l pr, @-r15; \
43 cfi_adjust_cfa_offset (4); \
44 cfi_rel_offset (pr, 0); \
45 bsrf r1; \
46 add r12, r4; \
47.Lfail0: \
48 /* Unreachable. */ \
49 .align 2; \
50.Lgot: \
51 .long _GLOBAL_OFFSET_TABLE_; \
52.Lstr: \
53 .long longjmp_msg@GOTOFF; \
54.Lfail: \
55 .long __GI___fortify_fail@PLT-(.Lfail0-.); \
56 cfi_restore_state;
57#else
58# define CALL_FAIL \
59 mov.l .Lfail, r1; \
60 mov.l .Lstr, r4; \
61 sts.l pr, @-r15; \
62 cfi_remember_state; \
63 cfi_adjust_cfa_offset (4); \
64 cfi_rel_offset (pr, 0); \
65 jsr @r1; \
66 nop; \
67 /* Unreachable. */ \
68 .align 2; \
69.Lstr: \
70 .long longjmp_msg; \
71.Lfail: \
72 .long __fortify_fail; \
73 cfi_restore_state;
74#endif
75
76#define CHECK_SP(reg) \
77 /* Jumping to a higher-address frame is always allowed. */ \
78 cmp/hs r15, reg; \
79 bt .Lok; \
80 \
81 mov.l r0, @-r15; /* The return value is already in here. */ \
82 cfi_adjust_cfa_offset (4); \
83 mov.l r1, @-r15; /* PTR_DEMANGLE helper. */ \
84 cfi_adjust_cfa_offset (4); \
85 mov.l r2, @-r15; /* The new SP value is already in here. */ \
86 cfi_adjust_cfa_offset (4); \
87 mov.l r4, @-r15; /* We'll still need this one. */ \
88 cfi_adjust_cfa_offset (4); \
89 add #-sizeSS, r15; \
90 cfi_adjust_cfa_offset (sizeSS); \
91 mov #0, r4; \
92 mov r15, r5; \
93 DO_CALL (sigaltstack, 2); \
94 /* Without working sigaltstack we cannot perform the test. */ \
95 tst r0, r0; \
96 bf .Lok2; \
97 mov.l @(oSS_FLAGS, r15), r0; \
98 tst #SS_ONSTACK, r0; \
99 bt .Lcall_fail; \
100 mov.l @(oSS_SIZE, r15), r2; \
101 mov.l @(oSS_SP, r15), r1; \
102 add r2, r1; \
103 sub r8, r1; \
104 cmp/hi r1, r2; \
105 bf .Lok2; \
106.Lcall_fail: \
107 CALL_FAIL \
108 \
109.Lok2: \
110 add #sizeSS, r15; \
111 cfi_adjust_cfa_offset (-sizeSS); \
112 mov.l @r15+, r4; \
113 cfi_adjust_cfa_offset (-4); \
114 mov.l @r15+, r2; \
115 cfi_adjust_cfa_offset (-4); \
116 mov.l @r15+, r1; \
117 cfi_adjust_cfa_offset (-4); \
118 mov.l @r15+, r0; \
119 cfi_adjust_cfa_offset (-4); \
120.Lok:
121
122#include <__longjmp.S>
123

Warning: That file was not part of the compilation database. It may have many parsing errors.