mirror of https://gitee.com/openkylin/linux.git
79 lines
1.4 KiB
C
79 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "symbol/kallsyms.h"
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#include "api/io.h"
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#include <stdio.h>
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#include <sys/stat.h>
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#include <fcntl.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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static void read_to_eol(struct io *io)
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{
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int ch;
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for (;;) {
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ch = io__get_char(io);
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if (ch < 0 || ch == '\n')
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return;
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}
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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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struct io io;
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char bf[BUFSIZ];
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int err;
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io.fd = open(filename, O_RDONLY, 0);
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if (io.fd < 0)
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return -1;
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io__init(&io, io.fd, bf, sizeof(bf));
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err = 0;
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while (!io.eof) {
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__u64 start;
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int ch;
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size_t i;
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char symbol_type;
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char symbol_name[KSYM_NAME_LEN + 1];
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if (io__get_hex(&io, &start) != ' ') {
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read_to_eol(&io);
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continue;
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}
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symbol_type = io__get_char(&io);
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if (io__get_char(&io) != ' ') {
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read_to_eol(&io);
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continue;
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}
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for (i = 0; i < sizeof(symbol_name); i++) {
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ch = io__get_char(&io);
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if (ch < 0 || ch == '\n')
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break;
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symbol_name[i] = ch;
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}
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symbol_name[i] = '\0';
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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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close(io.fd);
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return err;
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}
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