1/* PLT trampolines. Sparc 32-bit version.
2 Copyright (C) 2005-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <sysdep.h>
20
21 .text
22 .align 32
23
24 /* %g1: PLT offset loaded by PLT entry
25 * %g2: callers PC, which is PLT0 + 4, and we store the
26 * link map at PLT0 + 12, therefore we add 8 to get
27 * the address of the link map
28 */
29 .globl _dl_runtime_resolve
30 .type _dl_runtime_resolve, @function
31_dl_runtime_resolve:
32 cfi_startproc
33
34 save %sp, -104, %sp
35 cfi_def_cfa_register(%fp)
36 cfi_window_save
37 cfi_register (%o7, %i7)
38
39 ld [%g2 + 8], %o0
40 srl %g1, 10, %o1
41 call _dl_fixup
42 sub %o1, 4*12, %o1
43 jmp %o0
44 restore
45
46 cfi_endproc
47
48 .size _dl_runtime_resolve, .-_dl_runtime_resolve
49
50#ifdef SHARED
51 /* For the profiling cases we pass in our stack frame
52 * as the base of the La_sparc32_regs, so it looks
53 * like:
54 * %l0 %sp + (0 * 8)
55 * %l1 %sp + (0 * 8) + 4
56 * ...
57 * %l6 %sp + (3 * 8)
58 * %l7 %sp + (3 * 8) + 4
59 * %i0 %sp + (4 * 8)
60 * %i1 %sp + (4 * 8) + 4
61 * ...
62 * %i6 %sp + (7 * 8)
63 * %i7 %sp + (7 * 8) + 4
64 * struct_ret_ptr %sp + (8 * 8)
65 * framesize %sp + (9 * 8)
66 */
67
68 .globl _dl_profile_save_regs
69 .type _dl_profile_save_regs, @function
70_dl_profile_save_regs:
71 cfi_startproc
72
73 std %l0, [%sp + ( 0 * 8)]
74 std %l2, [%sp + ( 1 * 8)]
75 std %l4, [%sp + ( 2 * 8)]
76 std %l6, [%sp + ( 3 * 8)]
77 std %i0, [%sp + ( 4 * 8)]
78 std %i2, [%sp + ( 5 * 8)]
79 std %i4, [%sp + ( 6 * 8)]
80 std %i6, [%sp + ( 7 * 8)]
81 ld [%fp + (8 * 8)], %l4
82 retl
83 st %l4, [%sp + (8 * 8)]
84
85 cfi_endproc
86
87 .size _dl_profile_save_regs, .-_dl_profile_save_regs
88
89 /* If we are going to call pltexit, then we must replicate
90 * the caller's stack frame.
91 * %o0: PLT resolved function address
92 */
93 .globl _dl_profile_invoke
94 .type _dl_profile_invoke, @function
95_dl_profile_invoke:
96 cfi_startproc
97
98 add %l0, 7, %l0
99 andn %l0, 7, %l0
100 add %l0, 2 * 8, %g1
101
102 sub %sp, %g1, %sp
103 srl %l0, 3, %l7
104 mov %o0, %l1
105 mov %i0, %o0
106 mov %i1, %o1
107 mov %i2, %o2
108 mov %i3, %o3
109 mov %i4, %o4
110 mov %i5, %o5
111 cmp %l0, 0
112 mov %fp, %l2
113 be 2f
114 add %sp, (11 * 8), %l3
1151: ldd [%l2], %g2
116 add %l2, 0x8, %l2
117 subcc %l7, 1, %l7
118 std %g2, [%l3]
119 bne 1b
120 add %l3, 0x8, %l3
121
1222: jmpl %l1, %o7
123 nop
124
125 std %o0, [%sp + ( 9 * 8)]
126 std %f0, [%sp + (10 * 8)]
127
128 mov %l5, %o0
129 mov %l6, %o1
130 add %sp, (11 * 8), %o2
131 call _dl_audit_pltexit
132 add %sp, ( 9 * 8), %o3
133
134 ldd [%sp + ( 9 * 8)], %i0
135 ldd [%sp + (10 * 8)], %f0
136
137 jmpl %i7 + 8, %g0
138 restore
139
140 cfi_endproc
141
142 .size _dl_profile_invoke, .-_dl_profile_invoke
143
144 /* %g1: PLT offset loaded by PLT entry
145 * %g2: callers PC, which is PLT0 + 4, and we store the
146 * link map at PLT0 + 12, therefore we add 8 to get
147 * the address of the link map
148 */
149 .align 32
150 .globl _dl_runtime_profile
151 .type _dl_runtime_profile, @function
152_dl_runtime_profile:
153 cfi_startproc
154
155 save %sp, -104, %sp
156 cfi_def_cfa_register(%fp)
157 cfi_window_save
158 cfi_register(%o7, %i7)
159
160 ld [%g2 + 8], %o0
161 srl %g1, 10, %o1
162 mov %i7, %o2
163 sub %o1, 4*12, %o1
164
165 mov %o0, %l5
166 mov %o1, %l6
167
168 call _dl_profile_save_regs
169 nop
170
171 mov %sp, %o3
172 call _dl_profile_fixup
173 add %sp, (9 * 8), %o4
174
175 ld [%sp + (9 * 8)], %l0
176 cmp %l0, 0
177 bl 1f
178 nop
179
180 call _dl_profile_invoke
181 nop
182
1831: jmp %o0
184 restore
185
186 cfi_endproc
187
188 .size _dl_runtime_profile, .-_dl_runtime_profile
189#endif
190

source code of glibc/sysdeps/sparc/sparc32/dl-trampoline.S