79 lines · c
1// SPDX-License-Identifier: GPL-2.02#include "symbol/kallsyms.h"3#include "api/io.h"4#include <stdio.h>5#include <sys/stat.h>6#include <fcntl.h>7 8u8 kallsyms2elf_type(char type)9{10 type = tolower(type);11 return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;12}13 14bool kallsyms__is_function(char symbol_type)15{16 symbol_type = toupper(symbol_type);17 return symbol_type == 'T' || symbol_type == 'W';18}19 20static void read_to_eol(struct io *io)21{22 int ch;23 24 for (;;) {25 ch = io__get_char(io);26 if (ch < 0 || ch == '\n')27 return;28 }29}30 31int kallsyms__parse(const char *filename, void *arg,32 int (*process_symbol)(void *arg, const char *name,33 char type, u64 start))34{35 struct io io;36 char bf[BUFSIZ];37 int err;38 39 io.fd = open(filename, O_RDONLY, 0);40 41 if (io.fd < 0)42 return -1;43 44 io__init(&io, io.fd, bf, sizeof(bf));45 46 err = 0;47 while (!io.eof) {48 __u64 start;49 int ch;50 size_t i;51 char symbol_type;52 char symbol_name[KSYM_NAME_LEN + 1];53 54 if (io__get_hex(&io, &start) != ' ') {55 read_to_eol(&io);56 continue;57 }58 symbol_type = io__get_char(&io);59 if (io__get_char(&io) != ' ') {60 read_to_eol(&io);61 continue;62 }63 for (i = 0; i < sizeof(symbol_name); i++) {64 ch = io__get_char(&io);65 if (ch < 0 || ch == '\n')66 break;67 symbol_name[i] = ch;68 }69 symbol_name[i] = '\0';70 71 err = process_symbol(arg, symbol_name, symbol_type, start);72 if (err)73 break;74 }75 76 close(io.fd);77 return err;78}79