| 103,23 → 103,50 |
|---|
| return sym; /* Found */ |
| } |
| |
| |
| elf_symbol_t *symbol_def_find(char *name, module_t **m) |
| /** Find the definition of a symbol. |
| * |
| * By definition in System V ABI, if module origin has the flag DT_SYMBOLIC, |
| * origin is searched first. Otherwise, or if the symbol hasn't been found, |
| * the module dependency graph is searched breadth-first, beginning |
| * from the executable program. |
| * |
| * @param name Name of the symbol to search for. |
| * @param origin Module in which the dependency originates. |
| * @param mod (output) Will be filled with a pointer to the module |
| * that contains the symbol. |
| */ |
| elf_symbol_t *symbol_def_find(char *name, module_t *origin, module_t **mod) |
| { |
| module_t *m; |
| elf_symbol_t *sym; |
| |
| sym = def_find_in_module(name, runtime_env.program); |
| if (sym != NULL) { *m = runtime_env.program; return sym; } |
| /* FIXME: support DT_SYMBOLIC */ |
| //m = origin; |
| |
| sym = def_find_in_module(name, runtime_env.libc); |
| if (sym != NULL) { *m = runtime_env.libc; return sym; } |
| /* Start in the executable program */ |
| m = runtime_env.program; |
| |
| sym = def_find_in_module(name, &runtime_env.rtld); |
| if (sym != NULL) { *m = &runtime_env.rtld; return sym; } |
| while (true) { |
| sym = def_find_in_module(name, m); |
| if (sym != NULL) { |
| *mod = m; |
| return sym; |
| } |
| |
| printf("symbol found nowhere\n"); |
| *m = NULL; |
| return NULL; |
| if (m->n_deps < 1) break; |
| |
| /* FIXME: support branching */ |
| if (m->n_deps > 1) { |
| printf("error: BFS unimplemented\n"); |
| exit(1); |
| } |
| |
| m = m->deps[0]; |
| } |
| |
| printf("Error, symbol '%s' not found anywhere\n", name); |
| exit(1); |
| return NULL; /* Not found */ |
| } |
| |
| uintptr_t symbol_get_addr(elf_symbol_t *sym, module_t *m) |