1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Author: Patrick Stählin <me@packi.ch>
4 */
5 #include <linux/linkage.h>
6
7 #include <asm/asm.h>
8 #include <asm/asm-offsets.h>
9
10 .text
11 .altmacro
12
13 .macro save_all_base_regs
14 REG_S x1, PT_RA(sp)
15 REG_S x3, PT_GP(sp)
16 REG_S x4, PT_TP(sp)
17 REG_S x5, PT_T0(sp)
18 REG_S x6, PT_T1(sp)
19 REG_S x7, PT_T2(sp)
20 REG_S x8, PT_S0(sp)
21 REG_S x9, PT_S1(sp)
22 REG_S x10, PT_A0(sp)
23 REG_S x11, PT_A1(sp)
24 REG_S x12, PT_A2(sp)
25 REG_S x13, PT_A3(sp)
26 REG_S x14, PT_A4(sp)
27 REG_S x15, PT_A5(sp)
28 REG_S x16, PT_A6(sp)
29 REG_S x17, PT_A7(sp)
30 REG_S x18, PT_S2(sp)
31 REG_S x19, PT_S3(sp)
32 REG_S x20, PT_S4(sp)
33 REG_S x21, PT_S5(sp)
34 REG_S x22, PT_S6(sp)
35 REG_S x23, PT_S7(sp)
36 REG_S x24, PT_S8(sp)
37 REG_S x25, PT_S9(sp)
38 REG_S x26, PT_S10(sp)
39 REG_S x27, PT_S11(sp)
40 REG_S x28, PT_T3(sp)
41 REG_S x29, PT_T4(sp)
42 REG_S x30, PT_T5(sp)
43 REG_S x31, PT_T6(sp)
44 .endm
45
46 .macro restore_all_base_regs
47 REG_L x3, PT_GP(sp)
48 REG_L x4, PT_TP(sp)
49 REG_L x5, PT_T0(sp)
50 REG_L x6, PT_T1(sp)
51 REG_L x7, PT_T2(sp)
52 REG_L x8, PT_S0(sp)
53 REG_L x9, PT_S1(sp)
54 REG_L x10, PT_A0(sp)
55 REG_L x11, PT_A1(sp)
56 REG_L x12, PT_A2(sp)
57 REG_L x13, PT_A3(sp)
58 REG_L x14, PT_A4(sp)
59 REG_L x15, PT_A5(sp)
60 REG_L x16, PT_A6(sp)
61 REG_L x17, PT_A7(sp)
62 REG_L x18, PT_S2(sp)
63 REG_L x19, PT_S3(sp)
64 REG_L x20, PT_S4(sp)
65 REG_L x21, PT_S5(sp)
66 REG_L x22, PT_S6(sp)
67 REG_L x23, PT_S7(sp)
68 REG_L x24, PT_S8(sp)
69 REG_L x25, PT_S9(sp)
70 REG_L x26, PT_S10(sp)
71 REG_L x27, PT_S11(sp)
72 REG_L x28, PT_T3(sp)
73 REG_L x29, PT_T4(sp)
74 REG_L x30, PT_T5(sp)
75 REG_L x31, PT_T6(sp)
76 .endm
77
78 SYM_CODE_START(arch_rethook_trampoline)
79 addi sp, sp, -(PT_SIZE_ON_STACK)
80 save_all_base_regs
81
82 move a0, sp /* pt_regs */
83
84 call arch_rethook_trampoline_callback
85
86 /* use the result as the return-addres
87 move ra, a0
88
89 restore_all_base_regs
90 addi sp, sp, PT_SIZE_ON_STACK
91
92 ret
93 SYM_CODE_END(arch_rethook_trampoline)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.