78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* Copyright (c) 2024 Meta Platforms
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <stdbool.h>
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#include <zephyr/debug/symtab.h>
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#include <zephyr/shell/shell.h>
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const struct symtab_info *symtab_get(void)
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{
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extern const struct symtab_info z_symtab;
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return &z_symtab;
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}
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const char *symtab_find_symbol_name(uintptr_t addr, uint32_t *offset)
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{
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const struct symtab_info *const symtab = symtab_get();
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const uint32_t symbol_offset = addr - symtab->first_addr;
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uint32_t left = 0, right = symtab->length;
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uint32_t ret_offset = 0;
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const char *ret_name = "?";
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/* No need to search if the address is out-of-bound */
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if (symbol_offset < symtab->entries[symtab->length].offset) {
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while (left <= right) {
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uint32_t mid = left + (right - left) / 2;
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if ((symbol_offset >= symtab->entries[mid].offset) &&
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(symbol_offset < symtab->entries[mid + 1].offset)) {
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ret_offset = symbol_offset - symtab->entries[mid].offset;
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ret_name = symtab->entries[mid].name;
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break;
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} else if (symbol_offset < symtab->entries[mid].offset) {
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right = mid - 1;
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} else {
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left = mid + 1;
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}
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}
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}
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if (offset != NULL) {
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*offset = ret_offset;
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}
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return ret_name;
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}
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#ifdef CONFIG_SYMTAB_SHELL
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static int cmd_symtab_list(const struct shell *sh, size_t argc, char *argv[])
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{
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ARG_UNUSED(argc);
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ARG_UNUSED(argv);
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const struct symtab_info *const symtab = symtab_get();
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for (uint32_t i = 0; i < symtab->length; i++) {
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const struct z_symtab_entry *const entry = &symtab->entries[i];
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shell_print(sh, "%d\t%p %s", i + 1, (void *)(entry->offset + symtab->first_addr),
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entry->name);
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}
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return 0;
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}
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SHELL_STATIC_SUBCMD_SET_CREATE(symtab_cmds,
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SHELL_CMD(list, NULL, "Show symbol list.", cmd_symtab_list),
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SHELL_SUBCMD_SET_END
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);
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SHELL_CMD_REGISTER(symtab, &symtab_cmds, "Symbol table shell commands", NULL);
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#endif /* CONFIG_SYMTAB_SHELL */
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