1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* SPDX-License-Identifier: GPL-2.0+ */
#include <linux/linkage.h>
#include <asm/stackframe.h>
.text
.macro save_all_base_regs
cfi_st ra, PT_R1
cfi_st tp, PT_R2
cfi_st a0, PT_R4
cfi_st a1, PT_R5
cfi_st a2, PT_R6
cfi_st a3, PT_R7
cfi_st a4, PT_R8
cfi_st a5, PT_R9
cfi_st a6, PT_R10
cfi_st a7, PT_R11
cfi_st t0, PT_R12
cfi_st t1, PT_R13
cfi_st t2, PT_R14
cfi_st t3, PT_R15
cfi_st t4, PT_R16
cfi_st t5, PT_R17
cfi_st t6, PT_R18
cfi_st t7, PT_R19
cfi_st t8, PT_R20
cfi_st u0, PT_R21
cfi_st fp, PT_R22
cfi_st s0, PT_R23
cfi_st s1, PT_R24
cfi_st s2, PT_R25
cfi_st s3, PT_R26
cfi_st s4, PT_R27
cfi_st s5, PT_R28
cfi_st s6, PT_R29
cfi_st s7, PT_R30
cfi_st s8, PT_R31
csrrd t0, LOONGARCH_CSR_CRMD
andi t0, t0, 0x7 /* extract bit[1:0] PLV, bit[2] IE */
LONG_S t0, sp, PT_CRMD
.endm
.macro restore_all_base_regs
cfi_ld tp, PT_R2
cfi_ld a0, PT_R4
cfi_ld a1, PT_R5
cfi_ld a2, PT_R6
cfi_ld a3, PT_R7
cfi_ld a4, PT_R8
cfi_ld a5, PT_R9
cfi_ld a6, PT_R10
cfi_ld a7, PT_R11
cfi_ld t0, PT_R12
cfi_ld t1, PT_R13
cfi_ld t2, PT_R14
cfi_ld t3, PT_R15
cfi_ld t4, PT_R16
cfi_ld t5, PT_R17
cfi_ld t6, PT_R18
cfi_ld t7, PT_R19
cfi_ld t8, PT_R20
cfi_ld u0, PT_R21
cfi_ld fp, PT_R22
cfi_ld s0, PT_R23
cfi_ld s1, PT_R24
cfi_ld s2, PT_R25
cfi_ld s3, PT_R26
cfi_ld s4, PT_R27
cfi_ld s5, PT_R28
cfi_ld s6, PT_R29
cfi_ld s7, PT_R30
cfi_ld s8, PT_R31
LONG_L t0, sp, PT_CRMD
li.d t1, 0x7 /* mask bit[1:0] PLV, bit[2] IE */
csrxchg t0, t1, LOONGARCH_CSR_CRMD
.endm
SYM_CODE_START(arch_rethook_trampoline)
addi.d sp, sp, -PT_SIZE
save_all_base_regs
addi.d t0, sp, PT_SIZE
LONG_S t0, sp, PT_R3
move a0, sp /* pt_regs */
bl arch_rethook_trampoline_callback
/* use the result as the return-address */
move ra, a0
restore_all_base_regs
addi.d sp, sp, PT_SIZE
jr ra
SYM_CODE_END(arch_rethook_trampoline)
|
