2 * (C) GraÅžvydas "notaz" Ignotas, 2009-2010
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
9 * See the COPYING file in the top-level directory.
19 #include "host_dasm.h"
23 static struct disassemble_info di;
26 #define print_insn_func print_insn_little_arm
27 #define BFD_ARCH bfd_arch_arm
28 #define BFD_MACH bfd_mach_arm_unknown
29 #define DASM_OPTS "reg-names-std"
30 #elif defined __aarch64__
31 #define print_insn_func print_insn_aarch64
32 #define BFD_ARCH bfd_arch_aarch64
33 #define BFD_MACH bfd_mach_aarch64
34 #define DASM_OPTS NULL
35 #elif defined __mips__
36 #define print_insn_func print_insn_little_mips
37 #define BFD_ARCH bfd_arch_mips
38 #define BFD_MACH bfd_mach_mipsisa32
39 #define DASM_OPTS NULL
41 #define print_insn_func print_insn_riscv
42 #define BFD_ARCH bfd_arch_riscv
43 #define BFD_MACH bfd_mach_riscv64
44 #define DASM_OPTS NULL
45 #elif defined __powerpc__
46 #define print_insn_func print_insn_little_powerpc
47 #define BFD_ARCH bfd_arch_powerpc
48 #define BFD_MACH bfd_mach_ppc64
49 #define DASM_OPTS NULL
50 #elif defined(__x86_64__) || defined(__i386__)
51 #define print_insn_func print_insn_i386_intel
52 #define BFD_ARCH bfd_arch_i386
54 #define BFD_MACH bfd_mach_x86_64_intel_syntax
56 #define BFD_MACH bfd_mach_i386_i386_intel_syntax
58 #define DASM_OPTS NULL
60 #error "missing arch support"
64 static asymbol **symbols;
65 static long symcount, symstorage;
68 /* Filter out (in place) symbols that are useless for disassembly.
69 COUNT is the number of elements in SYMBOLS.
70 Return the number of useful symbols. */
72 remove_useless_symbols (asymbol **symbols, long count)
74 asymbol **in_ptr = symbols, **out_ptr = symbols;
78 asymbol *sym = *in_ptr++;
80 if (sym->name == NULL || sym->name[0] == '\0' || sym->name[0] == '$')
82 if (sym->flags & (BSF_DEBUGGING | BSF_SECTION_SYM))
84 if (bfd_is_und_section (sym->section)
85 || bfd_is_com_section (sym->section))
87 if (sym->value + sym->section->vma == 0)
90 printf("sym: %08lx %04x %08x v %08x \"%s\"\n",
91 (unsigned int)sym->value, (unsigned int)sym->flags, (unsigned int)sym->udata.i,
92 (unsigned int)sym->section->vma, sym->name);
97 return out_ptr - symbols;
100 static void slurp_symtab(const char *filename)
106 abfd = bfd_openr(filename, NULL);
108 fprintf(stderr, "failed to open: %s\n", filename);
112 if (!bfd_check_format(abfd, bfd_object))
115 if (!(bfd_get_file_flags(abfd) & HAS_SYMS))
118 symstorage = bfd_get_symtab_upper_bound(abfd);
122 symbols = malloc(symstorage);
126 symcount = bfd_canonicalize_symtab(abfd, symbols);
130 symcount = remove_useless_symbols(symbols, symcount);
135 fprintf(stderr, "no symbols in %s\n", bfd_get_filename(abfd));
143 static const char *lookup_name(bfd_vma addr)
145 asymbol **sptr = symbols;
148 for (i = 0; i < symcount; i++) {
149 asymbol *sym = *sptr++;
151 if (addr == sym->value + sym->section->vma)
158 /* Like target_read_memory, but slightly different parameters. */
160 dis_asm_read_memory(bfd_vma memaddr, bfd_byte *myaddr, unsigned int len,
161 struct disassemble_info *info)
163 memcpy(myaddr, (void *)(long)memaddr, len);
168 dis_asm_memory_error(int status, bfd_vma memaddr,
169 struct disassemble_info *info)
171 fprintf(stderr, "memory_error %p\n", (void *)(long)memaddr);
175 dis_asm_print_address(bfd_vma addr, struct disassemble_info *info)
179 printf("%08x", (int)addr);
181 name = lookup_name(addr);
183 printf(" <%s>", name);
186 static int insn_printf(void *f, const char *format, ...)
191 va_start(args, format);
192 n = vprintf(format, args);
198 static void host_dasm_init(void)
201 slurp_symtab(g_argv[0]);
203 init_disassemble_info(&di, NULL, insn_printf);
204 di.flavour = bfd_target_unknown_flavour;
205 di.memory_error_func = dis_asm_memory_error;
206 di.print_address_func = dis_asm_print_address;
207 // di.symbol_at_address_func = dis_asm_symbol_at_address;
208 di.read_memory_func = dis_asm_read_memory;
211 di.endian = BFD_ENDIAN_LITTLE;
212 di.disassembler_options = DASM_OPTS;
213 disassemble_init_for_target(&di);
217 void host_dasm(void *addr, int len)
219 bfd_vma vma_end, vma = (bfd_vma)(long)addr;
226 while (vma < vma_end) {
227 name = lookup_name(vma);
229 printf("%s:\n", name);
231 printf(" %08lx ", (long)vma);
232 vma += print_insn_func(vma, &di);
237 void host_dasm_new_symbol_(void *addr, const char *name)
239 bfd_vma vma = (bfd_vma)(long)addr;
246 if (symstorage <= symcount * sizeof(symbols[0])) {
247 tmp = realloc(symbols, symstorage * 2);
254 symbols[symcount] = calloc(sizeof(*symbols[0]), 1);
255 if (symbols[symcount] == NULL)
258 // a HACK (should use correct section), but ohwell
259 sym = symbols[symcount];
260 sym->section = symbols[0]->section;
261 sym->value = vma - sym->section->vma;