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) */
33 /* pointer to a float's payload */
38 enum relocation_class {
39 /* absolute address in a pointer-width location */
41 /* absolute address in a 4 byte location */
43 /* relative address in a 4 byte location */
45 /* absolute address in a PowerPC LIS/ORI sequence */
47 /* absolute address in a PowerPC LWZ instruction */
49 /* relative address in a PowerPC LWZ/STW/BC instruction */
51 /* relative address in a PowerPC B/BL instruction */
53 /* relative address in an ARM B/BL instruction */
55 /* pointer to address in an ARM LDR/STR instruction */
57 /* pointer to address in an ARM LDR/STR instruction offset by 8 bytes */
59 /* absolute address in a 2 byte location */
61 /* absolute address in a 1 byte location */
65 static const cell rel_absolute_ppc_2_mask = 0xffff;
66 static const cell rel_relative_ppc_2_mask = 0xfffc;
67 static const cell rel_relative_ppc_3_mask = 0x3fffffc;
68 static const cell rel_indirect_arm_mask = 0xfff;
69 static const cell rel_relative_arm_3_mask = 0xffffff;
71 /* code relocation table consists of a table of entries for each fixup */
72 struct relocation_entry {
75 explicit relocation_entry(u32 value_) : value(value_) {}
77 relocation_entry(relocation_type rel_type,
78 relocation_class rel_class,
81 value = (u32)((rel_type << 28) | (rel_class << 24) | offset);
84 relocation_type rel_type()
86 return (relocation_type)((value & 0xf0000000) >> 28);
89 relocation_class rel_class()
91 return (relocation_class)((value & 0x0f000000) >> 24);
96 return (value & 0x00ffffff);
99 int number_of_parameters()
108 case RT_ENTRY_POINT_PIC:
109 case RT_ENTRY_POINT_PIC_TAIL:
114 case RT_MEGAMORPHIC_CACHE_HITS:
115 case RT_CARDS_OFFSET:
116 case RT_DECKS_OFFSET:
117 case RT_EXCEPTION_HANDLER:
121 critical_error("Bad rel type",rel_type());
122 return -1; /* Can't happen */
127 struct instruction_operand {
128 relocation_entry rel;
129 code_block *compiled;
133 instruction_operand(relocation_entry rel_, code_block *compiled_, cell index_);
135 relocation_type rel_type()
137 return rel.rel_type();
142 return rel.rel_offset();
145 cell parameter_index()
150 code_block *parent_code_block()
155 fixnum load_value_2_2();
156 fixnum load_value_masked(cell mask, cell bits, cell shift);
157 fixnum load_value(cell relative_to);
159 cell load_float(cell relative_to);
161 code_block *load_code_block(cell relative_to);
162 code_block *load_code_block();
164 void store_value_2_2(fixnum value);
165 void store_value_masked(fixnum value, cell mask, cell shift);
166 void store_value(fixnum value);
167 void store_float(cell value);
168 void store_code_block(code_block *compiled);