89 lines
1.5 KiB
C
89 lines
1.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include "symbol/kallsyms.h"
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#include <stdio.h>
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#include <stdlib.h>
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u8 kallsyms2elf_type(char type)
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{
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type = tolower(type);
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return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
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}
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bool kallsyms__is_function(char symbol_type)
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{
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symbol_type = toupper(symbol_type);
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return symbol_type == 'T' || symbol_type == 'W';
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}
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/*
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* While we find nice hex chars, build a long_val.
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* Return number of chars processed.
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*/
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int hex2u64(const char *ptr, u64 *long_val)
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{
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char *p;
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*long_val = strtoull(ptr, &p, 16);
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return p - ptr;
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}
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int kallsyms__parse(const char *filename, void *arg,
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int (*process_symbol)(void *arg, const char *name,
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char type, u64 start))
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{
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char *line = NULL;
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size_t n;
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int err = -1;
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FILE *file = fopen(filename, "r");
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if (file == NULL)
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goto out_failure;
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err = 0;
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while (!feof(file)) {
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u64 start;
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int line_len, len;
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char symbol_type;
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char *symbol_name;
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line_len = getline(&line, &n, file);
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if (line_len < 0 || !line)
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break;
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line[--line_len] = '\0'; /* \n */
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len = hex2u64(line, &start);
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/* Skip the line if we failed to parse the address. */
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if (!len)
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continue;
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len++;
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if (len + 2 >= line_len)
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continue;
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symbol_type = line[len];
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len += 2;
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symbol_name = line + len;
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len = line_len - len;
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if (len >= KSYM_NAME_LEN) {
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err = -1;
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break;
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}
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err = process_symbol(arg, symbol_name, symbol_type, start);
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if (err)
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break;
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}
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free(line);
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fclose(file);
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return err;
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out_failure:
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return -1;
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}
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