glue(bswap_ehdr,SZ)1 static void glue(bswap_ehdr, SZ)(struct elfhdr *ehdr)
2 {
3 bswap16s(&ehdr->e_type); /* Object file type */
4 bswap16s(&ehdr->e_machine); /* Architecture */
5 bswap32s(&ehdr->e_version); /* Object file version */
6 bswapSZs(&ehdr->e_entry); /* Entry point virtual address */
7 bswapSZs(&ehdr->e_phoff); /* Program header table file offset */
8 bswapSZs(&ehdr->e_shoff); /* Section header table file offset */
9 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
10 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
11 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
12 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
13 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
14 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
15 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
16 }
17
glue(bswap_phdr,SZ)18 static void glue(bswap_phdr, SZ)(struct elf_phdr *phdr)
19 {
20 bswap32s(&phdr->p_type); /* Segment type */
21 bswapSZs(&phdr->p_offset); /* Segment file offset */
22 bswapSZs(&phdr->p_vaddr); /* Segment virtual address */
23 bswapSZs(&phdr->p_paddr); /* Segment physical address */
24 bswapSZs(&phdr->p_filesz); /* Segment size in file */
25 bswapSZs(&phdr->p_memsz); /* Segment size in memory */
26 bswap32s(&phdr->p_flags); /* Segment flags */
27 bswapSZs(&phdr->p_align); /* Segment alignment */
28 }
29
glue(bswap_shdr,SZ)30 static void glue(bswap_shdr, SZ)(struct elf_shdr *shdr)
31 {
32 bswap32s(&shdr->sh_name);
33 bswap32s(&shdr->sh_type);
34 bswapSZs(&shdr->sh_flags);
35 bswapSZs(&shdr->sh_addr);
36 bswapSZs(&shdr->sh_offset);
37 bswapSZs(&shdr->sh_size);
38 bswap32s(&shdr->sh_link);
39 bswap32s(&shdr->sh_info);
40 bswapSZs(&shdr->sh_addralign);
41 bswapSZs(&shdr->sh_entsize);
42 }
43
glue(bswap_sym,SZ)44 static void glue(bswap_sym, SZ)(struct elf_sym *sym)
45 {
46 bswap32s(&sym->st_name);
47 bswapSZs(&sym->st_value);
48 bswapSZs(&sym->st_size);
49 bswap16s(&sym->st_shndx);
50 }
51
glue(find_section,SZ)52 static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table,
53 int n, int type)
54 {
55 int i;
56 for(i=0;i<n;i++) {
57 if (shdr_table[i].sh_type == type)
58 return shdr_table + i;
59 }
60 return NULL;
61 }
62
glue(symfind,SZ)63 static int glue(symfind, SZ)(const void *s0, const void *s1)
64 {
65 struct elf_sym *key = (struct elf_sym *)s0;
66 struct elf_sym *sym = (struct elf_sym *)s1;
67 int result = 0;
68 if (key->st_value < sym->st_value) {
69 result = -1;
70 } else if (key->st_value > sym->st_value + sym->st_size) {
71 result = 1;
72 }
73 return result;
74 }
75
glue(lookup_symbol,SZ)76 static const char *glue(lookup_symbol, SZ)(struct syminfo *s, target_ulong orig_addr)
77 {
78 struct elf_sym *syms = glue(s->disas_symtab.elf, SZ);
79 struct elf_sym key;
80 struct elf_sym *sym;
81
82 key.st_value = orig_addr;
83
84 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), glue(symfind, SZ));
85 if (sym != 0) {
86 return s->disas_strtab + sym->st_name;
87 }
88
89 return "";
90 }
91
glue(symcmp,SZ)92 static int glue(symcmp, SZ)(const void *s0, const void *s1)
93 {
94 struct elf_sym *sym0 = (struct elf_sym *)s0;
95 struct elf_sym *sym1 = (struct elf_sym *)s1;
96 return (sym0->st_value < sym1->st_value)
97 ? -1
98 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
99 }
100
glue(load_symbols,SZ)101 static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
102 {
103 struct elf_shdr *symtab, *strtab, *shdr_table = NULL;
104 struct elf_sym *syms = NULL;
105 struct syminfo *s;
106 int nsyms, i;
107 char *str = NULL;
108
109 shdr_table = load_at(fd, ehdr->e_shoff,
110 sizeof(struct elf_shdr) * ehdr->e_shnum);
111 if (!shdr_table)
112 return -1;
113
114 if (must_swab) {
115 for (i = 0; i < ehdr->e_shnum; i++) {
116 glue(bswap_shdr, SZ)(shdr_table + i);
117 }
118 }
119
120 symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB);
121 if (!symtab)
122 goto fail;
123 syms = load_at(fd, symtab->sh_offset, symtab->sh_size);
124 if (!syms)
125 goto fail;
126
127 nsyms = symtab->sh_size / sizeof(struct elf_sym);
128
129 i = 0;
130 while (i < nsyms) {
131 if (must_swab)
132 glue(bswap_sym, SZ)(&syms[i]);
133 /* We are only interested in function symbols.
134 Throw everything else away. */
135 if (syms[i].st_shndx == SHN_UNDEF ||
136 syms[i].st_shndx >= SHN_LORESERVE ||
137 ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
138 nsyms--;
139 if (i < nsyms) {
140 syms[i] = syms[nsyms];
141 }
142 continue;
143 }
144 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
145 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
146 syms[i].st_value &= ~(target_ulong)1;
147 #endif
148 i++;
149 }
150 syms = qemu_realloc(syms, nsyms * sizeof(*syms));
151
152 qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ));
153
154 /* String table */
155 if (symtab->sh_link >= ehdr->e_shnum)
156 goto fail;
157 strtab = &shdr_table[symtab->sh_link];
158
159 str = load_at(fd, strtab->sh_offset, strtab->sh_size);
160 if (!str)
161 goto fail;
162
163 /* Commit */
164 s = qemu_mallocz(sizeof(*s));
165 s->lookup_symbol = glue(lookup_symbol, SZ);
166 glue(s->disas_symtab.elf, SZ) = syms;
167 s->disas_num_syms = nsyms;
168 s->disas_strtab = str;
169 s->next = syminfos;
170 syminfos = s;
171 qemu_free(shdr_table);
172 return 0;
173 fail:
174 qemu_free(syms);
175 qemu_free(str);
176 qemu_free(shdr_table);
177 return -1;
178 }
179
glue(load_elf,SZ)180 static int glue(load_elf, SZ)(int fd, int64_t address_offset,
181 int must_swab, uint64_t *pentry,
182 uint64_t *lowaddr, uint64_t *highaddr)
183 {
184 struct elfhdr ehdr;
185 struct elf_phdr *phdr = NULL, *ph;
186 int size, i, total_size;
187 elf_word mem_size;
188 uint64_t addr, low = (uint64_t)-1, high = 0;
189 uint8_t *data = NULL;
190
191 if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr))
192 goto fail;
193 if (must_swab) {
194 glue(bswap_ehdr, SZ)(&ehdr);
195 }
196
197 switch (ELF_MACHINE) {
198 case EM_PPC64:
199 if (EM_PPC64 != ehdr.e_machine)
200 if (EM_PPC != ehdr.e_machine)
201 goto fail;
202 break;
203 case EM_X86_64:
204 if (EM_X86_64 != ehdr.e_machine)
205 if (EM_386 != ehdr.e_machine)
206 goto fail;
207 break;
208 default:
209 if (ELF_MACHINE != ehdr.e_machine)
210 goto fail;
211 }
212
213 if (pentry)
214 *pentry = (uint64_t)(elf_sword)ehdr.e_entry;
215
216 glue(load_symbols, SZ)(&ehdr, fd, must_swab);
217
218 size = ehdr.e_phnum * sizeof(phdr[0]);
219 lseek(fd, ehdr.e_phoff, SEEK_SET);
220 phdr = qemu_mallocz(size);
221 if (!phdr)
222 goto fail;
223 if (read(fd, phdr, size) != size)
224 goto fail;
225 if (must_swab) {
226 for(i = 0; i < ehdr.e_phnum; i++) {
227 ph = &phdr[i];
228 glue(bswap_phdr, SZ)(ph);
229 }
230 }
231
232 total_size = 0;
233 for(i = 0; i < ehdr.e_phnum; i++) {
234 ph = &phdr[i];
235 if (ph->p_type == PT_LOAD) {
236 mem_size = ph->p_memsz;
237 /* XXX: avoid allocating */
238 data = qemu_mallocz(mem_size);
239 if (ph->p_filesz > 0) {
240 if (lseek(fd, ph->p_offset, SEEK_SET) < 0)
241 goto fail;
242 if (read(fd, data, ph->p_filesz) != ph->p_filesz)
243 goto fail;
244 }
245 /* address_offset is hack for kernel images that are
246 linked at the wrong physical address. */
247 addr = ph->p_paddr + address_offset;
248
249 cpu_physical_memory_write_rom(addr, data, mem_size);
250
251 total_size += mem_size;
252 if (addr < low)
253 low = addr;
254 if ((addr + mem_size) > high)
255 high = addr + mem_size;
256
257 qemu_free(data);
258 data = NULL;
259 }
260 }
261 qemu_free(phdr);
262 if (lowaddr)
263 *lowaddr = (uint64_t)(elf_sword)low;
264 if (highaddr)
265 *highaddr = (uint64_t)(elf_sword)high;
266 return total_size;
267 fail:
268 qemu_free(data);
269 qemu_free(phdr);
270 return -1;
271 }
272