1 | #ifdef TARGET_DEFS_ONLY
|
---|
2 |
|
---|
3 | #define EM_TCC_TARGET EM_AARCH64
|
---|
4 |
|
---|
5 | #define R_DATA_32 R_AARCH64_ABS32
|
---|
6 | #define R_DATA_PTR R_AARCH64_ABS64
|
---|
7 | #define R_JMP_SLOT R_AARCH64_JUMP_SLOT
|
---|
8 | #define R_GLOB_DAT R_AARCH64_GLOB_DAT
|
---|
9 | #define R_COPY R_AARCH64_COPY
|
---|
10 | #define R_RELATIVE R_AARCH64_RELATIVE
|
---|
11 |
|
---|
12 | #define R_NUM R_AARCH64_NUM
|
---|
13 |
|
---|
14 | #define ELF_START_ADDR 0x00400000
|
---|
15 | #define ELF_PAGE_SIZE 0x1000
|
---|
16 |
|
---|
17 | #define PCRELATIVE_DLLPLT 1
|
---|
18 | #define RELOCATE_DLLPLT 1
|
---|
19 |
|
---|
20 | #else /* !TARGET_DEFS_ONLY */
|
---|
21 |
|
---|
22 | #include "tcc.h"
|
---|
23 |
|
---|
24 | /* Returns 1 for a code relocation, 0 for a data relocation. For unknown
|
---|
25 | relocations, returns -1. */
|
---|
26 | int code_reloc (int reloc_type)
|
---|
27 | {
|
---|
28 | switch (reloc_type) {
|
---|
29 | case R_AARCH64_ABS32:
|
---|
30 | case R_AARCH64_ABS64:
|
---|
31 | case R_AARCH64_PREL32:
|
---|
32 | case R_AARCH64_MOVW_UABS_G0_NC:
|
---|
33 | case R_AARCH64_MOVW_UABS_G1_NC:
|
---|
34 | case R_AARCH64_MOVW_UABS_G2_NC:
|
---|
35 | case R_AARCH64_MOVW_UABS_G3:
|
---|
36 | case R_AARCH64_ADR_PREL_PG_HI21:
|
---|
37 | case R_AARCH64_ADD_ABS_LO12_NC:
|
---|
38 | case R_AARCH64_ADR_GOT_PAGE:
|
---|
39 | case R_AARCH64_LD64_GOT_LO12_NC:
|
---|
40 | case R_AARCH64_GLOB_DAT:
|
---|
41 | case R_AARCH64_COPY:
|
---|
42 | return 0;
|
---|
43 |
|
---|
44 | case R_AARCH64_JUMP26:
|
---|
45 | case R_AARCH64_CALL26:
|
---|
46 | case R_AARCH64_JUMP_SLOT:
|
---|
47 | return 1;
|
---|
48 | }
|
---|
49 |
|
---|
50 | tcc_error ("Unknown relocation type: %d", reloc_type);
|
---|
51 | return -1;
|
---|
52 | }
|
---|
53 |
|
---|
54 | /* Returns an enumerator to describe whether and when the relocation needs a
|
---|
55 | GOT and/or PLT entry to be created. See tcc.h for a description of the
|
---|
56 | different values. */
|
---|
57 | int gotplt_entry_type (int reloc_type)
|
---|
58 | {
|
---|
59 | switch (reloc_type) {
|
---|
60 | case R_AARCH64_PREL32:
|
---|
61 | case R_AARCH64_MOVW_UABS_G0_NC:
|
---|
62 | case R_AARCH64_MOVW_UABS_G1_NC:
|
---|
63 | case R_AARCH64_MOVW_UABS_G2_NC:
|
---|
64 | case R_AARCH64_MOVW_UABS_G3:
|
---|
65 | case R_AARCH64_ADR_PREL_PG_HI21:
|
---|
66 | case R_AARCH64_ADD_ABS_LO12_NC:
|
---|
67 | case R_AARCH64_GLOB_DAT:
|
---|
68 | case R_AARCH64_JUMP_SLOT:
|
---|
69 | case R_AARCH64_COPY:
|
---|
70 | return NO_GOTPLT_ENTRY;
|
---|
71 |
|
---|
72 | case R_AARCH64_ABS32:
|
---|
73 | case R_AARCH64_ABS64:
|
---|
74 | case R_AARCH64_JUMP26:
|
---|
75 | case R_AARCH64_CALL26:
|
---|
76 | return AUTO_GOTPLT_ENTRY;
|
---|
77 |
|
---|
78 | case R_AARCH64_ADR_GOT_PAGE:
|
---|
79 | case R_AARCH64_LD64_GOT_LO12_NC:
|
---|
80 | return ALWAYS_GOTPLT_ENTRY;
|
---|
81 | }
|
---|
82 |
|
---|
83 | tcc_error ("Unknown relocation type: %d", reloc_type);
|
---|
84 | return -1;
|
---|
85 | }
|
---|
86 |
|
---|
87 | ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr)
|
---|
88 | {
|
---|
89 | Section *plt = s1->plt;
|
---|
90 | uint8_t *p;
|
---|
91 | unsigned plt_offset;
|
---|
92 |
|
---|
93 | if (s1->output_type == TCC_OUTPUT_DLL)
|
---|
94 | tcc_error("DLLs unimplemented!");
|
---|
95 |
|
---|
96 | if (plt->data_offset == 0) {
|
---|
97 | section_ptr_add(plt, 32);
|
---|
98 | }
|
---|
99 | plt_offset = plt->data_offset;
|
---|
100 |
|
---|
101 | p = section_ptr_add(plt, 16);
|
---|
102 | write32le(p, got_offset);
|
---|
103 | write32le(p + 4, (uint64_t) got_offset >> 32);
|
---|
104 | return plt_offset;
|
---|
105 | }
|
---|
106 |
|
---|
107 | /* relocate the PLT: compute addresses and offsets in the PLT now that final
|
---|
108 | address for PLT and GOT are known (see fill_program_header) */
|
---|
109 | ST_FUNC void relocate_plt(TCCState *s1)
|
---|
110 | {
|
---|
111 | uint8_t *p, *p_end;
|
---|
112 |
|
---|
113 | if (!s1->plt)
|
---|
114 | return;
|
---|
115 |
|
---|
116 | p = s1->plt->data;
|
---|
117 | p_end = p + s1->plt->data_offset;
|
---|
118 |
|
---|
119 | if (p < p_end) {
|
---|
120 | uint64_t plt = s1->plt->sh_addr;
|
---|
121 | uint64_t got = s1->got->sh_addr;
|
---|
122 | uint64_t off = (got >> 12) - (plt >> 12);
|
---|
123 | if ((off + ((uint32_t)1 << 20)) >> 21)
|
---|
124 | tcc_error("Failed relocating PLT (off=0x%lx, got=0x%lx, plt=0x%lx)", off, got, plt);
|
---|
125 | write32le(p, 0xa9bf7bf0); // stp x16,x30,[sp,#-16]!
|
---|
126 | write32le(p + 4, (0x90000010 | // adrp x16,...
|
---|
127 | (off & 0x1ffffc) << 3 | (off & 3) << 29));
|
---|
128 | write32le(p + 8, (0xf9400211 | // ldr x17,[x16,#...]
|
---|
129 | (got & 0xff8) << 7));
|
---|
130 | write32le(p + 12, (0x91000210 | // add x16,x16,#...
|
---|
131 | (got & 0xfff) << 10));
|
---|
132 | write32le(p + 16, 0xd61f0220); // br x17
|
---|
133 | write32le(p + 20, 0xd503201f); // nop
|
---|
134 | write32le(p + 24, 0xd503201f); // nop
|
---|
135 | write32le(p + 28, 0xd503201f); // nop
|
---|
136 | p += 32;
|
---|
137 | while (p < p_end) {
|
---|
138 | uint64_t pc = plt + (p - s1->plt->data);
|
---|
139 | uint64_t addr = got + read64le(p);
|
---|
140 | uint64_t off = (addr >> 12) - (pc >> 12);
|
---|
141 | if ((off + ((uint32_t)1 << 20)) >> 21)
|
---|
142 | tcc_error("Failed relocating PLT (off=0x%lx, addr=0x%lx, pc=0x%lx)", off, addr, pc);
|
---|
143 | write32le(p, (0x90000010 | // adrp x16,...
|
---|
144 | (off & 0x1ffffc) << 3 | (off & 3) << 29));
|
---|
145 | write32le(p + 4, (0xf9400211 | // ldr x17,[x16,#...]
|
---|
146 | (addr & 0xff8) << 7));
|
---|
147 | write32le(p + 8, (0x91000210 | // add x16,x16,#...
|
---|
148 | (addr & 0xfff) << 10));
|
---|
149 | write32le(p + 12, 0xd61f0220); // br x17
|
---|
150 | p += 16;
|
---|
151 | }
|
---|
152 | }
|
---|
153 | }
|
---|
154 |
|
---|
155 | void relocate_init(Section *sr) {}
|
---|
156 |
|
---|
157 | void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val)
|
---|
158 | {
|
---|
159 | int sym_index = ELFW(R_SYM)(rel->r_info);
|
---|
160 | #ifdef DEBUG_RELOC
|
---|
161 | ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
|
---|
162 | #endif
|
---|
163 |
|
---|
164 | switch(type) {
|
---|
165 | case R_AARCH64_ABS64:
|
---|
166 | write64le(ptr, val);
|
---|
167 | return;
|
---|
168 | case R_AARCH64_ABS32:
|
---|
169 | write32le(ptr, val);
|
---|
170 | return;
|
---|
171 | case R_AARCH64_PREL32:
|
---|
172 | write32le(ptr, val - addr);
|
---|
173 | return;
|
---|
174 | case R_AARCH64_MOVW_UABS_G0_NC:
|
---|
175 | write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
|
---|
176 | (val & 0xffff) << 5));
|
---|
177 | return;
|
---|
178 | case R_AARCH64_MOVW_UABS_G1_NC:
|
---|
179 | write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
|
---|
180 | (val >> 16 & 0xffff) << 5));
|
---|
181 | return;
|
---|
182 | case R_AARCH64_MOVW_UABS_G2_NC:
|
---|
183 | write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
|
---|
184 | (val >> 32 & 0xffff) << 5));
|
---|
185 | return;
|
---|
186 | case R_AARCH64_MOVW_UABS_G3:
|
---|
187 | write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
|
---|
188 | (val >> 48 & 0xffff) << 5));
|
---|
189 | return;
|
---|
190 | case R_AARCH64_ADR_PREL_PG_HI21: {
|
---|
191 | uint64_t off = (val >> 12) - (addr >> 12);
|
---|
192 | if ((off + ((uint64_t)1 << 20)) >> 21)
|
---|
193 | tcc_error("R_AARCH64_ADR_PREL_PG_HI21 relocation failed");
|
---|
194 | write32le(ptr, ((read32le(ptr) & 0x9f00001f) |
|
---|
195 | (off & 0x1ffffc) << 3 | (off & 3) << 29));
|
---|
196 | return;
|
---|
197 | }
|
---|
198 | case R_AARCH64_ADD_ABS_LO12_NC:
|
---|
199 | write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
|
---|
200 | (val & 0xfff) << 10));
|
---|
201 | return;
|
---|
202 | case R_AARCH64_JUMP26:
|
---|
203 | case R_AARCH64_CALL26:
|
---|
204 | #ifdef DEBUG_RELOC
|
---|
205 | printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val,
|
---|
206 | (char *) symtab_section->link->data + sym->st_name);
|
---|
207 | #endif
|
---|
208 | if (((val - addr) + ((uint64_t)1 << 27)) & ~(uint64_t)0xffffffc)
|
---|
209 | tcc_error("R_AARCH64_(JUMP|CALL)26 relocation failed"
|
---|
210 | " (val=%lx, addr=%lx)", val, addr);
|
---|
211 | write32le(ptr, (0x14000000 |
|
---|
212 | (uint32_t)(type == R_AARCH64_CALL26) << 31 |
|
---|
213 | ((val - addr) >> 2 & 0x3ffffff)));
|
---|
214 | return;
|
---|
215 | case R_AARCH64_ADR_GOT_PAGE: {
|
---|
216 | uint64_t off =
|
---|
217 | (((s1->got->sh_addr +
|
---|
218 | s1->sym_attrs[sym_index].got_offset) >> 12) - (addr >> 12));
|
---|
219 | if ((off + ((uint64_t)1 << 20)) >> 21)
|
---|
220 | tcc_error("R_AARCH64_ADR_GOT_PAGE relocation failed");
|
---|
221 | write32le(ptr, ((read32le(ptr) & 0x9f00001f) |
|
---|
222 | (off & 0x1ffffc) << 3 | (off & 3) << 29));
|
---|
223 | return;
|
---|
224 | }
|
---|
225 | case R_AARCH64_LD64_GOT_LO12_NC:
|
---|
226 | write32le(ptr,
|
---|
227 | ((read32le(ptr) & 0xfff803ff) |
|
---|
228 | ((s1->got->sh_addr +
|
---|
229 | s1->sym_attrs[sym_index].got_offset) & 0xff8) << 7));
|
---|
230 | return;
|
---|
231 | case R_AARCH64_COPY:
|
---|
232 | return;
|
---|
233 | case R_AARCH64_GLOB_DAT:
|
---|
234 | case R_AARCH64_JUMP_SLOT:
|
---|
235 | /* They don't need addend */
|
---|
236 | #ifdef DEBUG_RELOC
|
---|
237 | printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr,
|
---|
238 | val - rel->r_addend,
|
---|
239 | (char *) symtab_section->link->data + sym->st_name);
|
---|
240 | #endif
|
---|
241 | write64le(ptr, val - rel->r_addend);
|
---|
242 | return;
|
---|
243 | case R_AARCH64_RELATIVE:
|
---|
244 | #ifdef TCC_TARGET_PE
|
---|
245 | add32le(ptr, val - s1->pe_imagebase);
|
---|
246 | #endif
|
---|
247 | /* do nothing */
|
---|
248 | return;
|
---|
249 | default:
|
---|
250 | fprintf(stderr, "FIXME: handle reloc type %x at %x [%p] to %x\n",
|
---|
251 | type, (unsigned)addr, ptr, (unsigned)val);
|
---|
252 | return;
|
---|
253 | }
|
---|
254 | }
|
---|
255 |
|
---|
256 | #endif /* !TARGET_DEFS_ONLY */
|
---|