Text file src/runtime/rt0_linux_ppc64le.s
1 #include "go_asm.h"
2 #include "textflag.h"
3
4 TEXT _rt0_ppc64le_linux(SB),NOSPLIT,$0
5 XOR R0, R0 // Make sure R0 is zero before _main
6 BR _main<>(SB)
7
8 TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT,$-8
9 // Start with standard C stack frame layout and linkage.
10 MOVD LR, R0
11 MOVD R0, 16(R1) // Save LR in caller's frame.
12 MOVW CR, R0 // Save CR in caller's frame
13 MOVD R0, 8(R1)
14 MOVDU R1, -320(R1) // Allocate frame.
15
16 // Preserve callee-save registers.
17 MOVD R14, 24(R1)
18 MOVD R15, 32(R1)
19 MOVD R16, 40(R1)
20 MOVD R17, 48(R1)
21 MOVD R18, 56(R1)
22 MOVD R19, 64(R1)
23 MOVD R20, 72(R1)
24 MOVD R21, 80(R1)
25 MOVD R22, 88(R1)
26 MOVD R23, 96(R1)
27 MOVD R24, 104(R1)
28 MOVD R25, 112(R1)
29 MOVD R26, 120(R1)
30 MOVD R27, 128(R1)
31 MOVD R28, 136(R1)
32 MOVD R29, 144(R1)
33 MOVD g, 152(R1) // R30
34 MOVD R31, 160(R1)
35 FMOVD F14, 168(R1)
36 FMOVD F15, 176(R1)
37 FMOVD F16, 184(R1)
38 FMOVD F17, 192(R1)
39 FMOVD F18, 200(R1)
40 FMOVD F19, 208(R1)
41 FMOVD F20, 216(R1)
42 FMOVD F21, 224(R1)
43 FMOVD F22, 232(R1)
44 FMOVD F23, 240(R1)
45 FMOVD F24, 248(R1)
46 FMOVD F25, 256(R1)
47 FMOVD F26, 264(R1)
48 FMOVD F27, 272(R1)
49 FMOVD F28, 280(R1)
50 FMOVD F29, 288(R1)
51 FMOVD F30, 296(R1)
52 FMOVD F31, 304(R1)
53
54 MOVD R3, _rt0_ppc64le_linux_lib_argc<>(SB)
55 MOVD R4, _rt0_ppc64le_linux_lib_argv<>(SB)
56
57 // Synchronous initialization.
58 MOVD $runtime·reginit(SB), R12
59 MOVD R12, CTR
60 BL (CTR)
61 MOVD $runtime·libpreinit(SB), R12
62 MOVD R12, CTR
63 BL (CTR)
64
65 // Create a new thread to do the runtime initialization and return.
66 MOVD _cgo_sys_thread_create(SB), R12
67 CMP $0, R12
68 BEQ nocgo
69 MOVD $_rt0_ppc64le_linux_lib_go(SB), R3
70 MOVD $0, R4
71 MOVD R12, CTR
72 BL (CTR)
73 BR done
74
75 nocgo:
76 MOVD $0x800000, R12 // stacksize = 8192KB
77 MOVD R12, 8(R1)
78 MOVD $_rt0_ppc64le_linux_lib_go(SB), R12
79 MOVD R12, 16(R1)
80 MOVD $runtime·newosproc0(SB),R12
81 MOVD R12, CTR
82 BL (CTR)
83
84 done:
85 // Restore saved registers.
86 MOVD 24(R1), R14
87 MOVD 32(R1), R15
88 MOVD 40(R1), R16
89 MOVD 48(R1), R17
90 MOVD 56(R1), R18
91 MOVD 64(R1), R19
92 MOVD 72(R1), R20
93 MOVD 80(R1), R21
94 MOVD 88(R1), R22
95 MOVD 96(R1), R23
96 MOVD 104(R1), R24
97 MOVD 112(R1), R25
98 MOVD 120(R1), R26
99 MOVD 128(R1), R27
100 MOVD 136(R1), R28
101 MOVD 144(R1), R29
102 MOVD 152(R1), g // R30
103 MOVD 160(R1), R31
104 FMOVD 168(R1), F14
105 FMOVD 176(R1), F15
106 FMOVD 184(R1), F16
107 FMOVD 192(R1), F17
108 FMOVD 200(R1), F18
109 FMOVD 208(R1), F19
110 FMOVD 216(R1), F20
111 FMOVD 224(R1), F21
112 FMOVD 232(R1), F22
113 FMOVD 240(R1), F23
114 FMOVD 248(R1), F24
115 FMOVD 256(R1), F25
116 FMOVD 264(R1), F26
117 FMOVD 272(R1), F27
118 FMOVD 280(R1), F28
119 FMOVD 288(R1), F29
120 FMOVD 296(R1), F30
121 FMOVD 304(R1), F31
122
123 ADD $320, R1
124 MOVD 8(R1), R0
125 MOVFL R0, $0xff
126 MOVD 16(R1), R0
127 MOVD R0, LR
128 RET
129
130 TEXT _rt0_ppc64le_linux_lib_go(SB),NOSPLIT,$0
131 MOVD _rt0_ppc64le_linux_lib_argc<>(SB), R3
132 MOVD _rt0_ppc64le_linux_lib_argv<>(SB), R4
133 MOVD $runtime·rt0_go(SB), R12
134 MOVD R12, CTR
135 BR (CTR)
136
137 DATA _rt0_ppc64le_linux_lib_argc<>(SB)/8, $0
138 GLOBL _rt0_ppc64le_linux_lib_argc<>(SB),NOPTR, $8
139 DATA _rt0_ppc64le_linux_lib_argv<>(SB)/8, $0
140 GLOBL _rt0_ppc64le_linux_lib_argv<>(SB),NOPTR, $8
141
142 TEXT _main<>(SB),NOSPLIT,$-8
143 // In a statically linked binary, the stack contains argc,
144 // argv as argc string pointers followed by a NULL, envv as a
145 // sequence of string pointers followed by a NULL, and auxv.
146 // There is no TLS base pointer.
147 //
148 // In a dynamically linked binary, r3 contains argc, r4
149 // contains argv, r5 contains envp, r6 contains auxv, and r13
150 // contains the TLS pointer.
151 //
152 // Figure out which case this is by looking at r4: if it's 0,
153 // we're statically linked; otherwise we're dynamically
154 // linked.
155 CMP R0, R4
156 BNE dlink
157
158 // Statically linked
159 MOVD 0(R1), R3 // argc
160 ADD $8, R1, R4 // argv
161 MOVD $runtime·m0+m_tls(SB), R13 // TLS
162 ADD $0x7000, R13
163
164 dlink:
165 BR main(SB)
166
167 TEXT main(SB),NOSPLIT,$-8
168 MOVD $runtime·rt0_go(SB), R12
169 MOVD R12, CTR
170 BR (CTR)
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