source: EcnlProtoTool/trunk/tcc-0.9.27/arm64-link.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 8.4 KB
Line 
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. */
26int 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. */
57int 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
87ST_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) */
109ST_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
155void relocate_init(Section *sr) {}
156
157void 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 */
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