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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
#if defined(__ppc64__)
#define MODE_CHOICE(x, y) y
#else
#define MODE_CHOICE(x, y) x
#endif
#define machine_choice MODE_CHOICE(ppc7400,ppc64)
; Define some pseudo-opcodes for size-independent load & store of GPRs ...
#define lgu MODE_CHOICE(lwzu, ldu)
#define lg MODE_CHOICE(lwz,ld)
#define sg MODE_CHOICE(stw,std)
#define sgu MODE_CHOICE(stwu,stdu)
; ... and the size of GPRs and their storage indicator.
#define GPR_BYTES MODE_CHOICE(4,8)
#define LOG2_GPR_BYTES MODE_CHOICE(2,3) /* log2(GPR_BYTES) */
#define g_long MODE_CHOICE(long, quad) /* usage is ".g_long" */
; From the ABI doc: "Mac OS X ABI Function Call Guide" Version 2009-02-04.
#define LINKAGE_SIZE MODE_CHOICE(24,48)
#define PARAM_AREA MODE_CHOICE(32,64)
#define SAVED_LR_OFFSET MODE_CHOICE(8,16) /* save position for lr */
; The whole stack frame **MUST** be 16byte-aligned.
#define SAVE_SIZE (LINKAGE_SIZE+PARAM_AREA)
#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
; We no longer need the pic symbol stub for Darwin >= 9.
#define BLGCP1 _GC_push_one
#undef WANT_STUB
#else
#define BLGCP1 L_GC_push_one$stub
#define WANT_STUB
#endif
.machine machine_choice
; GC_push_regs function. Under some optimization levels GCC will clobber
; some of the non-volatile registers before we get a chance to save them
; therefore, this cannot be inline asm.
.text
.align LOG2_GPR_BYTES
.globl _GC_push_regs
_GC_push_regs:
; Prolog
mflr r0
sg r0,SAVED_LR_OFFSET(r1)
sgu r1,-SAVE_SIZE(r1)
L_body:
; 'Push' r13-r31
mr r3,r13
bl BLGCP1
mr r3,r14
bl BLGCP1
mr r3,r15
bl BLGCP1
mr r3,r16
bl BLGCP1
mr r3,r17
bl BLGCP1
mr r3,r18
bl BLGCP1
mr r3,r19
bl BLGCP1
mr r3,r20
bl BLGCP1
mr r3,r21
bl BLGCP1
mr r3,r22
bl BLGCP1
mr r3,r23
bl BLGCP1
mr r3,r24
bl BLGCP1
mr r3,r25
bl BLGCP1
mr r3,r26
bl BLGCP1
mr r3,r27
bl BLGCP1
mr r3,r28
bl BLGCP1
mr r3,r29
bl BLGCP1
mr r3,r30
bl BLGCP1
mr r3,r31
bl BLGCP1
L_epilog:
; Epilog
lg r0,SAVE_SIZE+SAVED_LR_OFFSET(r1)
addi r1,r1,SAVE_SIZE
mtlr r0
; Return
blr
LFE0:
; eh frames, for those that want 'em.
#define EH_DATA_ALIGN_FACT MODE_CHOICE(0x7c,0x78)
#define EH_FRAME_OFFSET MODE_CHOICE(0x40,0x70)
.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
.set L$set$0,LECIE1-LSCIE1
.long L$set$0 ; Length of Common Information Entry
LSCIE1:
.long 0 ; CIE Identifier Tag
.byte 0x1 ; CIE Version
.ascii "zR\0" ; CIE Augmentation
.byte 0x1 ; uleb128 0x1; CIE Code Alignment Factor
.byte EH_DATA_ALIGN_FACT ; sleb128 -4/-8; CIE Data Alignment Factor
.byte 0x41 ; CIE RA Column
.byte 0x1 ; uleb128 0x1; Augmentation size
.byte 0x10 ; FDE Encoding (pcrel)
.byte 0xc ; DW_CFA_def_cfa
.byte 0x1 ; uleb128 0x1
.byte 0 ; uleb128 0
.align LOG2_GPR_BYTES
LECIE1:
.globl _GC_push_regs.eh
_GC_push_regs.eh:
LSFDE1:
.set L$set$1,LEFDE1-LASFDE1
.long L$set$1 ; FDE Length
LASFDE1:
.long LASFDE1-EH_frame1 ; FDE CIE offset
.g_long _GC_push_regs-. ; FDE initial location
.set L$set$2,LFE0-_GC_push_regs
.g_long L$set$2 ; FDE address range
.byte 0 ; uleb128 0; Augmentation size
.byte 0x4 ; DW_CFA_advance_loc4
.set L$set$3,L_body-_GC_push_regs
.long L$set$3
.byte 0xe ; DW_CFA_def_cfa_offset
.byte EH_FRAME_OFFSET ; uleb128 0x40/0x70
.byte 0x11 ; DW_CFA_offset_extended_sf
.byte 0x41 ; uleb128 0x41
.byte 0x7e ; sleb128 -2
.byte 0x4 ; DW_CFA_advance_loc4
.set L$set$4,L_epilog-L_body
.long L$set$4
.byte 0xe ; DW_CFA_def_cfa_offset
.byte 0 ; uleb128 0
.align LOG2_GPR_BYTES
LEFDE1:
.data
#ifdef WANT_STUB
; PIC stub stuff, generated by GCC
.section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
.align LOG2_GPR_BYTES
L_GC_push_one$stub:
.indirect_symbol _GC_push_one
mflr r0
bcl 20,31,L0$_GC_push_one
L0$_GC_push_one:
mflr r11
addis r11,r11,ha16(L_GC_push_one$lazy_ptr-L0$_GC_push_one)
mtlr r0
lgu r12,lo16(L_GC_push_one$lazy_ptr-L0$_GC_push_one)(r11)
mtctr r12
bctr
.data
.lazy_symbol_pointer
L_GC_push_one$lazy_ptr:
.indirect_symbol _GC_push_one
.g_long dyld_stub_binding_helper
#endif
|
