e1ce0aefff
Use pyelftools to extract the symbol table from the link stage executable. Then, filter out the function names and sort them based on their offsets before writing into the `symtab.c`, this is similar to how the `isr_tables` works. To access the structure, simply include the new header: ```c #include <zephyr/debug/symtab.h> ``` Signed-off-by: Yong Cong Sin <ycsin@meta.com>
47 lines
1.0 KiB
C
47 lines
1.0 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 <zephyr/debug/symtab.h>
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const struct symtab_info *const 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 *const 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->start_addr;
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uint32_t left = 0, right = symtab->length - 1;
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uint32_t ret_offset = 0;
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const char *ret_name = "?";
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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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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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