5 /* arg is a literal table index, holding a pair (symbol/dll) */
7 /* a word or quotation's general entry point */
9 /* a word's PIC entry point */
11 /* a word's tail-call PIC entry point */
12 RT_ENTRY_POINT_PIC_TAIL,
15 /* current code block */
17 /* data heap literal */
19 /* untagged fixnum literal */
21 /* address of megamorphic_cache_hits var */
22 RT_MEGAMORPHIC_CACHE_HITS,
23 /* address of vm object */
25 /* value of vm->cards_offset */
27 /* value of vm->decks_offset */
29 /* address of exception_handler -- this exists as a separate relocation
30 type since its used in a situation where relocation arguments cannot
31 be passed in, and so RT_DLSYM is inappropriate (Windows only) */
35 enum relocation_class {
36 /* absolute address in a pointer-width location */
38 /* absolute address in a 4 byte location */
40 /* relative address in a 4 byte location */
42 /* absolute address in a PowerPC LIS/ORI sequence */
44 /* absolute address in a PowerPC LWZ instruction */
46 /* relative address in a PowerPC LWZ/STW/BC instruction */
48 /* relative address in a PowerPC B/BL instruction */
50 /* relative address in an ARM B/BL instruction */
52 /* pointer to address in an ARM LDR/STR instruction */
54 /* pointer to address in an ARM LDR/STR instruction offset by 8 bytes */
56 /* absolute address in a 2 byte location */
58 /* absolute address in a 1 byte location */
62 static const cell rel_absolute_ppc_2_mask = 0xffff;
63 static const cell rel_relative_ppc_2_mask = 0xfffc;
64 static const cell rel_relative_ppc_3_mask = 0x3fffffc;
65 static const cell rel_indirect_arm_mask = 0xfff;
66 static const cell rel_relative_arm_3_mask = 0xffffff;
68 /* code relocation table consists of a table of entries for each fixup */
69 struct relocation_entry {
72 explicit relocation_entry(u32 value_) : value(value_) {}
74 relocation_entry(relocation_type rel_type,
75 relocation_class rel_class,
78 value = (u32)((rel_type << 28) | (rel_class << 24) | offset);
81 relocation_type rel_type()
83 return (relocation_type)((value & 0xf0000000) >> 28);
86 relocation_class rel_class()
88 return (relocation_class)((value & 0x0f000000) >> 24);
93 return (value & 0x00ffffff);
96 int number_of_parameters()
105 case RT_ENTRY_POINT_PIC:
106 case RT_ENTRY_POINT_PIC_TAIL:
111 case RT_MEGAMORPHIC_CACHE_HITS:
112 case RT_CARDS_OFFSET:
113 case RT_DECKS_OFFSET:
114 case RT_EXCEPTION_HANDLER:
117 critical_error("Bad rel type",rel_type());
118 return -1; /* Can't happen */
123 struct instruction_operand {
124 relocation_entry rel;
125 code_block *compiled;
129 instruction_operand(relocation_entry rel_, code_block *compiled_, cell index_);
131 relocation_type rel_type()
133 return rel.rel_type();
138 return rel.rel_offset();
141 cell parameter_index()
146 code_block *parent_code_block()
151 fixnum load_value_2_2();
152 fixnum load_value_masked(cell mask, cell bits, cell shift);
153 fixnum load_value(cell relative_to);
155 code_block *load_code_block(cell relative_to);
156 code_block *load_code_block();
158 void store_value_2_2(fixnum value);
159 void store_value_masked(fixnum value, cell mask, cell shift);
160 void store_value(fixnum value);
161 void store_code_block(code_block *compiled);