root / elf_ops.h @ 5bc89ef6
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1 | 5fe141fd | bellard | static void glue(bswap_ehdr, SZ)(struct elfhdr *ehdr) |
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2 | 5fe141fd | bellard | { |
3 | 5fe141fd | bellard | bswap16s(&ehdr->e_type); /* Object file type */
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4 | 5fe141fd | bellard | bswap16s(&ehdr->e_machine); /* Architecture */
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5 | 5fe141fd | bellard | bswap32s(&ehdr->e_version); /* Object file version */
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6 | 5fe141fd | bellard | bswapSZs(&ehdr->e_entry); /* Entry point virtual address */
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7 | 5fe141fd | bellard | bswapSZs(&ehdr->e_phoff); /* Program header table file offset */
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8 | 5fe141fd | bellard | bswapSZs(&ehdr->e_shoff); /* Section header table file offset */
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9 | 5fe141fd | bellard | bswap32s(&ehdr->e_flags); /* Processor-specific flags */
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10 | 5fe141fd | bellard | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
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11 | 5fe141fd | bellard | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
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12 | 5fe141fd | bellard | bswap16s(&ehdr->e_phnum); /* Program header table entry count */
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13 | 5fe141fd | bellard | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
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14 | 5fe141fd | bellard | bswap16s(&ehdr->e_shnum); /* Section header table entry count */
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15 | 5fe141fd | bellard | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
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16 | 5fe141fd | bellard | } |
17 | 5fe141fd | bellard | |
18 | 5fe141fd | bellard | static void glue(bswap_phdr, SZ)(struct elf_phdr *phdr) |
19 | 5fe141fd | bellard | { |
20 | 5fe141fd | bellard | bswap32s(&phdr->p_type); /* Segment type */
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21 | 5fe141fd | bellard | bswapSZs(&phdr->p_offset); /* Segment file offset */
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22 | 5fe141fd | bellard | bswapSZs(&phdr->p_vaddr); /* Segment virtual address */
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23 | 5fe141fd | bellard | bswapSZs(&phdr->p_paddr); /* Segment physical address */
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24 | 5fe141fd | bellard | bswapSZs(&phdr->p_filesz); /* Segment size in file */
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25 | 5fe141fd | bellard | bswapSZs(&phdr->p_memsz); /* Segment size in memory */
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26 | 5fe141fd | bellard | bswap32s(&phdr->p_flags); /* Segment flags */
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27 | 5fe141fd | bellard | bswapSZs(&phdr->p_align); /* Segment alignment */
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28 | 5fe141fd | bellard | } |
29 | 5fe141fd | bellard | |
30 | 5fe141fd | bellard | static void glue(bswap_shdr, SZ)(struct elf_shdr *shdr) |
31 | 5fe141fd | bellard | { |
32 | 5fe141fd | bellard | bswap32s(&shdr->sh_name); |
33 | 5fe141fd | bellard | bswap32s(&shdr->sh_type); |
34 | 5fe141fd | bellard | bswapSZs(&shdr->sh_flags); |
35 | 5fe141fd | bellard | bswapSZs(&shdr->sh_addr); |
36 | 5fe141fd | bellard | bswapSZs(&shdr->sh_offset); |
37 | 5fe141fd | bellard | bswapSZs(&shdr->sh_size); |
38 | 5fe141fd | bellard | bswap32s(&shdr->sh_link); |
39 | 5fe141fd | bellard | bswap32s(&shdr->sh_info); |
40 | 5fe141fd | bellard | bswapSZs(&shdr->sh_addralign); |
41 | 5fe141fd | bellard | bswapSZs(&shdr->sh_entsize); |
42 | 5fe141fd | bellard | } |
43 | 5fe141fd | bellard | |
44 | 5fe141fd | bellard | static void glue(bswap_sym, SZ)(struct elf_sym *sym) |
45 | 5fe141fd | bellard | { |
46 | 5fe141fd | bellard | bswap32s(&sym->st_name); |
47 | 5fe141fd | bellard | bswapSZs(&sym->st_value); |
48 | 5fe141fd | bellard | bswapSZs(&sym->st_size); |
49 | 5fe141fd | bellard | bswap16s(&sym->st_shndx); |
50 | 5fe141fd | bellard | } |
51 | 5fe141fd | bellard | |
52 | 5fafdf24 | ths | static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table, |
53 | 5fe141fd | bellard | int n, int type) |
54 | 5fe141fd | bellard | { |
55 | 5fe141fd | bellard | int i;
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56 | 5fe141fd | bellard | for(i=0;i<n;i++) { |
57 | 5fe141fd | bellard | if (shdr_table[i].sh_type == type)
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58 | 5fe141fd | bellard | return shdr_table + i;
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59 | 5fe141fd | bellard | } |
60 | 5fe141fd | bellard | return NULL; |
61 | 5fe141fd | bellard | } |
62 | 5fe141fd | bellard | |
63 | 49918a75 | pbrook | static int glue(symfind, SZ)(const void *s0, const void *s1) |
64 | 49918a75 | pbrook | { |
65 | 49918a75 | pbrook | struct elf_sym *key = (struct elf_sym *)s0; |
66 | 49918a75 | pbrook | struct elf_sym *sym = (struct elf_sym *)s1; |
67 | 49918a75 | pbrook | int result = 0; |
68 | 49918a75 | pbrook | if (key->st_value < sym->st_value) {
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69 | 49918a75 | pbrook | result = -1;
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70 | ec822001 | Laurent Desnogues | } else if (key->st_value >= sym->st_value + sym->st_size) { |
71 | 49918a75 | pbrook | result = 1;
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72 | 49918a75 | pbrook | } |
73 | 49918a75 | pbrook | return result;
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74 | 49918a75 | pbrook | } |
75 | 49918a75 | pbrook | |
76 | 49918a75 | pbrook | static const char *glue(lookup_symbol, SZ)(struct syminfo *s, target_ulong orig_addr) |
77 | 49918a75 | pbrook | { |
78 | 49918a75 | pbrook | struct elf_sym *syms = glue(s->disas_symtab.elf, SZ);
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79 | 49918a75 | pbrook | struct elf_sym key;
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80 | 49918a75 | pbrook | struct elf_sym *sym;
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81 | 49918a75 | pbrook | |
82 | 49918a75 | pbrook | key.st_value = orig_addr; |
83 | 49918a75 | pbrook | |
84 | 49918a75 | pbrook | sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), glue(symfind, SZ));
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85 | 660f11be | Blue Swirl | if (sym != NULL) { |
86 | 49918a75 | pbrook | return s->disas_strtab + sym->st_name;
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87 | 49918a75 | pbrook | } |
88 | 49918a75 | pbrook | |
89 | 49918a75 | pbrook | return ""; |
90 | 49918a75 | pbrook | } |
91 | 49918a75 | pbrook | |
92 | 49918a75 | pbrook | static int glue(symcmp, SZ)(const void *s0, const void *s1) |
93 | 49918a75 | pbrook | { |
94 | 49918a75 | pbrook | struct elf_sym *sym0 = (struct elf_sym *)s0; |
95 | 49918a75 | pbrook | struct elf_sym *sym1 = (struct elf_sym *)s1; |
96 | 49918a75 | pbrook | return (sym0->st_value < sym1->st_value)
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97 | 49918a75 | pbrook | ? -1
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98 | 49918a75 | pbrook | : ((sym0->st_value > sym1->st_value) ? 1 : 0); |
99 | 49918a75 | pbrook | } |
100 | 49918a75 | pbrook | |
101 | 5fe141fd | bellard | static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab) |
102 | 5fe141fd | bellard | { |
103 | 5fe141fd | bellard | struct elf_shdr *symtab, *strtab, *shdr_table = NULL; |
104 | 5fe141fd | bellard | struct elf_sym *syms = NULL; |
105 | 5fe141fd | bellard | struct syminfo *s;
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106 | 5fe141fd | bellard | int nsyms, i;
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107 | 5fe141fd | bellard | char *str = NULL; |
108 | 5fe141fd | bellard | |
109 | 5fafdf24 | ths | shdr_table = load_at(fd, ehdr->e_shoff, |
110 | 5fe141fd | bellard | sizeof(struct elf_shdr) * ehdr->e_shnum); |
111 | 5fe141fd | bellard | if (!shdr_table)
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112 | 5fe141fd | bellard | return -1; |
113 | 3b46e624 | ths | |
114 | 5fe141fd | bellard | if (must_swab) {
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115 | 5fe141fd | bellard | for (i = 0; i < ehdr->e_shnum; i++) { |
116 | 5fe141fd | bellard | glue(bswap_shdr, SZ)(shdr_table + i); |
117 | 5fe141fd | bellard | } |
118 | 5fe141fd | bellard | } |
119 | 3b46e624 | ths | |
120 | 5fe141fd | bellard | symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB); |
121 | 5fe141fd | bellard | if (!symtab)
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122 | 5fe141fd | bellard | goto fail;
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123 | 5fe141fd | bellard | syms = load_at(fd, symtab->sh_offset, symtab->sh_size); |
124 | 5fe141fd | bellard | if (!syms)
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125 | 5fe141fd | bellard | goto fail;
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126 | 5fe141fd | bellard | |
127 | 5fe141fd | bellard | nsyms = symtab->sh_size / sizeof(struct elf_sym); |
128 | 49918a75 | pbrook | |
129 | 49918a75 | pbrook | i = 0;
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130 | 49918a75 | pbrook | while (i < nsyms) {
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131 | 5fe141fd | bellard | if (must_swab)
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132 | 5fe141fd | bellard | glue(bswap_sym, SZ)(&syms[i]); |
133 | 49918a75 | pbrook | /* We are only interested in function symbols.
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134 | 49918a75 | pbrook | Throw everything else away. */
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135 | 49918a75 | pbrook | if (syms[i].st_shndx == SHN_UNDEF ||
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136 | 49918a75 | pbrook | syms[i].st_shndx >= SHN_LORESERVE || |
137 | 49918a75 | pbrook | ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { |
138 | 49918a75 | pbrook | nsyms--; |
139 | 49918a75 | pbrook | if (i < nsyms) {
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140 | 49918a75 | pbrook | syms[i] = syms[nsyms]; |
141 | 49918a75 | pbrook | } |
142 | 49918a75 | pbrook | continue;
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143 | 49918a75 | pbrook | } |
144 | 49918a75 | pbrook | #if defined(TARGET_ARM) || defined (TARGET_MIPS)
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145 | 49918a75 | pbrook | /* The bottom address bit marks a Thumb or MIPS16 symbol. */
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146 | 49918a75 | pbrook | syms[i].st_value &= ~(target_ulong)1;
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147 | 5fe141fd | bellard | #endif
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148 | 49918a75 | pbrook | i++; |
149 | 5fe141fd | bellard | } |
150 | 49918a75 | pbrook | syms = qemu_realloc(syms, nsyms * sizeof(*syms));
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151 | 49918a75 | pbrook | |
152 | 49918a75 | pbrook | qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ));
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153 | 49918a75 | pbrook | |
154 | 5fe141fd | bellard | /* String table */
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155 | 5fe141fd | bellard | if (symtab->sh_link >= ehdr->e_shnum)
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156 | 5fe141fd | bellard | goto fail;
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157 | 5fe141fd | bellard | strtab = &shdr_table[symtab->sh_link]; |
158 | 5fe141fd | bellard | |
159 | 5fe141fd | bellard | str = load_at(fd, strtab->sh_offset, strtab->sh_size); |
160 | 5fe141fd | bellard | if (!str)
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161 | 49918a75 | pbrook | goto fail;
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162 | 5fe141fd | bellard | |
163 | 5fe141fd | bellard | /* Commit */
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164 | 5fe141fd | bellard | s = qemu_mallocz(sizeof(*s));
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165 | 49918a75 | pbrook | s->lookup_symbol = glue(lookup_symbol, SZ); |
166 | 49918a75 | pbrook | glue(s->disas_symtab.elf, SZ) = syms; |
167 | 5fe141fd | bellard | s->disas_num_syms = nsyms; |
168 | 5fe141fd | bellard | s->disas_strtab = str; |
169 | 5fe141fd | bellard | s->next = syminfos; |
170 | 5fe141fd | bellard | syminfos = s; |
171 | 5fe141fd | bellard | qemu_free(shdr_table); |
172 | 5fe141fd | bellard | return 0; |
173 | 5fe141fd | bellard | fail:
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174 | 5fe141fd | bellard | qemu_free(syms); |
175 | 5fe141fd | bellard | qemu_free(str); |
176 | 5fe141fd | bellard | qemu_free(shdr_table); |
177 | 5fe141fd | bellard | return -1; |
178 | 5fe141fd | bellard | } |
179 | 5fe141fd | bellard | |
180 | 83c1f87c | pbrook | static int glue(load_elf, SZ)(int fd, int64_t address_offset, |
181 | 9596ebb7 | pbrook | int must_swab, uint64_t *pentry,
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182 | 9596ebb7 | pbrook | uint64_t *lowaddr, uint64_t *highaddr) |
183 | 5fe141fd | bellard | { |
184 | 5fe141fd | bellard | struct elfhdr ehdr;
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185 | 5fe141fd | bellard | struct elf_phdr *phdr = NULL, *ph; |
186 | 5fe141fd | bellard | int size, i, total_size;
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187 | 9437454a | blueswir1 | elf_word mem_size; |
188 | fd93a799 | Paul Brook | uint64_t addr, low = (uint64_t)-1, high = 0; |
189 | 9ee3c029 | bellard | uint8_t *data = NULL;
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190 | 5fe141fd | bellard | |
191 | 5fe141fd | bellard | if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr)) |
192 | 5fe141fd | bellard | goto fail;
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193 | 5fe141fd | bellard | if (must_swab) {
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194 | 5fe141fd | bellard | glue(bswap_ehdr, SZ)(&ehdr); |
195 | 5fe141fd | bellard | } |
196 | 5fe141fd | bellard | |
197 | 7f70c937 | blueswir1 | switch (ELF_MACHINE) {
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198 | 7f70c937 | blueswir1 | case EM_PPC64:
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199 | 7f70c937 | blueswir1 | if (EM_PPC64 != ehdr.e_machine)
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200 | 7f70c937 | blueswir1 | if (EM_PPC != ehdr.e_machine)
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201 | 7f70c937 | blueswir1 | goto fail;
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202 | 7f70c937 | blueswir1 | break;
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203 | 7f70c937 | blueswir1 | case EM_X86_64:
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204 | 7f70c937 | blueswir1 | if (EM_X86_64 != ehdr.e_machine)
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205 | 7f70c937 | blueswir1 | if (EM_386 != ehdr.e_machine)
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206 | 7f70c937 | blueswir1 | goto fail;
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207 | 7f70c937 | blueswir1 | break;
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208 | 7f70c937 | blueswir1 | default:
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209 | 7f70c937 | blueswir1 | if (ELF_MACHINE != ehdr.e_machine)
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210 | 7f70c937 | blueswir1 | goto fail;
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211 | 7f70c937 | blueswir1 | } |
212 | 9042c0e2 | ths | |
213 | 9ee3c029 | bellard | if (pentry)
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214 | 82790064 | ths | *pentry = (uint64_t)(elf_sword)ehdr.e_entry; |
215 | 9ee3c029 | bellard | |
216 | 5fe141fd | bellard | glue(load_symbols, SZ)(&ehdr, fd, must_swab); |
217 | 5fe141fd | bellard | |
218 | 5fe141fd | bellard | size = ehdr.e_phnum * sizeof(phdr[0]); |
219 | 5fe141fd | bellard | lseek(fd, ehdr.e_phoff, SEEK_SET); |
220 | 5fe141fd | bellard | phdr = qemu_mallocz(size); |
221 | 5fe141fd | bellard | if (!phdr)
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222 | 5fe141fd | bellard | goto fail;
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223 | 5fe141fd | bellard | if (read(fd, phdr, size) != size)
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224 | 04d4b0c3 | ths | goto fail;
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225 | 5fe141fd | bellard | if (must_swab) {
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226 | 5fe141fd | bellard | for(i = 0; i < ehdr.e_phnum; i++) { |
227 | 5fe141fd | bellard | ph = &phdr[i]; |
228 | 5fe141fd | bellard | glue(bswap_phdr, SZ)(ph); |
229 | 5fe141fd | bellard | } |
230 | 5fe141fd | bellard | } |
231 | 3b46e624 | ths | |
232 | 5fe141fd | bellard | total_size = 0;
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233 | 5fe141fd | bellard | for(i = 0; i < ehdr.e_phnum; i++) { |
234 | 5fe141fd | bellard | ph = &phdr[i]; |
235 | 5fe141fd | bellard | if (ph->p_type == PT_LOAD) {
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236 | 5fe141fd | bellard | mem_size = ph->p_memsz; |
237 | 5fe141fd | bellard | /* XXX: avoid allocating */
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238 | 5fe141fd | bellard | data = qemu_mallocz(mem_size); |
239 | 5fe141fd | bellard | if (ph->p_filesz > 0) { |
240 | 9ee3c029 | bellard | if (lseek(fd, ph->p_offset, SEEK_SET) < 0) |
241 | 04d4b0c3 | ths | goto fail;
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242 | 5fe141fd | bellard | if (read(fd, data, ph->p_filesz) != ph->p_filesz)
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243 | 04d4b0c3 | ths | goto fail;
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244 | 5fe141fd | bellard | } |
245 | 83c1f87c | pbrook | /* address_offset is hack for kernel images that are
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246 | 83c1f87c | pbrook | linked at the wrong physical address. */
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247 | 83c1f87c | pbrook | addr = ph->p_paddr + address_offset; |
248 | 5fe141fd | bellard | |
249 | 5fe141fd | bellard | cpu_physical_memory_write_rom(addr, data, mem_size); |
250 | 5fe141fd | bellard | |
251 | 5fe141fd | bellard | total_size += mem_size; |
252 | fd93a799 | Paul Brook | if (addr < low)
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253 | 74287114 | ths | low = addr; |
254 | fd93a799 | Paul Brook | if ((addr + mem_size) > high)
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255 | 74287114 | ths | high = addr + mem_size; |
256 | 5fe141fd | bellard | |
257 | 5fe141fd | bellard | qemu_free(data); |
258 | 9ee3c029 | bellard | data = NULL;
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259 | 5fe141fd | bellard | } |
260 | 5fe141fd | bellard | } |
261 | 3aee288b | bellard | qemu_free(phdr); |
262 | 74287114 | ths | if (lowaddr)
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263 | 82790064 | ths | *lowaddr = (uint64_t)(elf_sword)low; |
264 | 74287114 | ths | if (highaddr)
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265 | 82790064 | ths | *highaddr = (uint64_t)(elf_sword)high; |
266 | 5fe141fd | bellard | return total_size;
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267 | 04d4b0c3 | ths | fail:
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268 | 9ee3c029 | bellard | qemu_free(data); |
269 | 5fe141fd | bellard | qemu_free(phdr); |
270 | 5fe141fd | bellard | return -1; |
271 | 5fe141fd | bellard | } |