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1 /*******************************************************
2 * *
3 * ------------------------------------------------- *
4 * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
5 * ------------------------------------------------- *
6 * | 0 | 8 | 16 | 24 | *
7 * ------------------------------------------------- *
8 * | FS0 | FS1 | FS2 | FS3 | *
9 * ------------------------------------------------- *
10 * ------------------------------------------------- *
11 * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
12 * ------------------------------------------------- *
13 * | 32 | 40 | 48 | 56 | *
14 * ------------------------------------------------- *
15 * | FS4 | FS5 | FS6 | FS7 | *
16 * ------------------------------------------------- *
17 * ------------------------------------------------- *
18 * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
19 * ------------------------------------------------- *
20 * | 64 | 72 | 80 | 88 | *
21 * ------------------------------------------------- *
22 * | S0 | S1 | S2 | S3 | *
23 * ------------------------------------------------- *
24 * ------------------------------------------------- *
25 * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
26 * ------------------------------------------------- *
27 * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
28 * ------------------------------------------------- *
29 * | S4 | S5 | S6 | S7 | *
30 * ------------------------------------------------- *
31 * ------------------------------------------------- *
32 * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
33 * ------------------------------------------------- *
34 * | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | *
35 * ------------------------------------------------- *
36 * | S8 | FP | RA | PC | *
37 * ------------------------------------------------- *
38 * *
39 * *****************************************************/
40
41 .file "make_loongarch64_sysv_elf_gas.S"
42 .text
43 .globl make_fcontext
44 .align 2
45 .type make_fcontext,@function
46 make_fcontext:
47 # shift address in A0 to lower 16 byte boundary
48 bstrins.d $a0, $zero, 3, 0
49
50 # reserve space for context-data on context-stack
51 addi.d $a0, $a0, -160
52
53 # third arg of make_fcontext() == address of context-function
54 st.d $a2, $a0, 152
55
56 # save address of finish as return-address for context-function
57 # will be entered after context-function returns
58 la.local $a4, finish
59 st.d $a4, $a0, 144
60
61 # return pointer to context-data
62 jr $ra
63
64 finish:
65 # exit code is zero
66 li.d $a0, 0
67 # call _exit(0)
68 b %plt(_exit)
69
70 .size make_fcontext, .-make_fcontext
71 /* Mark that we don't need executable stack. */
72 .section .note.GNU-stack,"",%progbits