@samitouri / QOSamiQemu
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1 /*
2 * Loongarch64 linux replacement vdso.
3 *
4 * Copyright 2023 Linaro, Ltd.
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8
9 #include <asm/unistd.h>
10 #include <asm/errno.h>
11 #include "vdso-asmoffset.h"
12
13
14 .text
15
16 .macro endf name
17 .globl \name
18 .type \name, @function
19 .size \name, . - \name
20 .endm
21
22 .macro vdso_syscall name, nr
23 \name:
24 li.w $a7, \nr
25 syscall 0
26 jr $ra
27 endf \name
28 .endm
29
30 .cfi_startproc
31
32 vdso_syscall __vdso_gettimeofday, __NR_gettimeofday
33 vdso_syscall __vdso_clock_gettime, __NR_clock_gettime
34 vdso_syscall __vdso_clock_getres, __NR_clock_getres
35 vdso_syscall __vdso_getcpu, __NR_getcpu
36
37 .cfi_endproc
38
39 /*
40 * Start the unwind info at least one instruction before the signal
41 * trampoline, because the unwinder will assume we are returning
42 * after a call site.
43 */
44
45 .cfi_startproc simple
46 .cfi_signal_frame
47
48 #define B_GR offsetof_sigcontext_gr
49 #define B_FR sizeof_sigcontext + sizeof_sctx_info + offsetof_fpucontext_fr
50
51 .cfi_def_cfa 2, offsetof_sigcontext
52
53 /* Return address */
54 .cfi_return_column 64
55 .cfi_offset 64, offsetof_sigcontext_pc /* pc */
56
57 /* Integer registers */
58 .cfi_offset 1, B_GR + 1 * 8
59 .cfi_offset 2, B_GR + 2 * 8
60 .cfi_offset 3, B_GR + 3 * 8
61 .cfi_offset 4, B_GR + 4 * 8
62 .cfi_offset 5, B_GR + 5 * 8
63 .cfi_offset 6, B_GR + 6 * 8
64 .cfi_offset 7, B_GR + 7 * 8
65 .cfi_offset 8, B_GR + 8 * 8
66 .cfi_offset 9, B_GR + 9 * 8
67 .cfi_offset 10, B_GR + 10 * 8
68 .cfi_offset 11, B_GR + 11 * 8
69 .cfi_offset 12, B_GR + 12 * 8
70 .cfi_offset 13, B_GR + 13 * 8
71 .cfi_offset 14, B_GR + 14 * 8
72 .cfi_offset 15, B_GR + 15 * 8
73 .cfi_offset 16, B_GR + 16 * 8
74 .cfi_offset 17, B_GR + 17 * 8
75 .cfi_offset 18, B_GR + 18 * 8
76 .cfi_offset 19, B_GR + 19 * 8
77 .cfi_offset 20, B_GR + 20 * 8
78 .cfi_offset 21, B_GR + 21 * 8
79 .cfi_offset 22, B_GR + 22 * 8
80 .cfi_offset 23, B_GR + 23 * 8
81 .cfi_offset 24, B_GR + 24 * 8
82 .cfi_offset 25, B_GR + 25 * 8
83 .cfi_offset 26, B_GR + 26 * 8
84 .cfi_offset 27, B_GR + 27 * 8
85 .cfi_offset 28, B_GR + 28 * 8
86 .cfi_offset 29, B_GR + 29 * 8
87 .cfi_offset 30, B_GR + 30 * 8
88 .cfi_offset 31, B_GR + 31 * 8
89
90 /* Floating point registers */
91 .cfi_offset 32, B_FR + 0
92 .cfi_offset 33, B_FR + 1 * 8
93 .cfi_offset 34, B_FR + 2 * 8
94 .cfi_offset 35, B_FR + 3 * 8
95 .cfi_offset 36, B_FR + 4 * 8
96 .cfi_offset 37, B_FR + 5 * 8
97 .cfi_offset 38, B_FR + 6 * 8
98 .cfi_offset 39, B_FR + 7 * 8
99 .cfi_offset 40, B_FR + 8 * 8
100 .cfi_offset 41, B_FR + 9 * 8
101 .cfi_offset 42, B_FR + 10 * 8
102 .cfi_offset 43, B_FR + 11 * 8
103 .cfi_offset 44, B_FR + 12 * 8
104 .cfi_offset 45, B_FR + 13 * 8
105 .cfi_offset 46, B_FR + 14 * 8
106 .cfi_offset 47, B_FR + 15 * 8
107 .cfi_offset 48, B_FR + 16 * 8
108 .cfi_offset 49, B_FR + 17 * 8
109 .cfi_offset 50, B_FR + 18 * 8
110 .cfi_offset 51, B_FR + 19 * 8
111 .cfi_offset 52, B_FR + 20 * 8
112 .cfi_offset 53, B_FR + 21 * 8
113 .cfi_offset 54, B_FR + 22 * 8
114 .cfi_offset 55, B_FR + 23 * 8
115 .cfi_offset 56, B_FR + 24 * 8
116 .cfi_offset 57, B_FR + 25 * 8
117 .cfi_offset 58, B_FR + 26 * 8
118 .cfi_offset 59, B_FR + 27 * 8
119 .cfi_offset 60, B_FR + 28 * 8
120 .cfi_offset 61, B_FR + 29 * 8
121 .cfi_offset 62, B_FR + 30 * 8
122 .cfi_offset 63, B_FR + 31 * 8
123
124 nop
125
126 __vdso_rt_sigreturn:
127 li.w $a7, __NR_rt_sigreturn
128 sigreturn_region_start:
129 syscall 0
130 sigreturn_region_end:
131 .cfi_endproc
132 endf __vdso_rt_sigreturn