Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include "symbol/kallsyms.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include "api/io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) u8 kallsyms2elf_type(char type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	type = tolower(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) bool kallsyms__is_function(char symbol_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	symbol_type = toupper(symbol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	return symbol_type == 'T' || symbol_type == 'W';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static void read_to_eol(struct io *io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	int ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		ch = io__get_char(io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		if (ch < 0 || ch == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int kallsyms__parse(const char *filename, void *arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		    int (*process_symbol)(void *arg, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 					  char type, u64 start))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	struct io io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	char bf[BUFSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	io.fd = open(filename, O_RDONLY, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (io.fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	io__init(&io, io.fd, bf, sizeof(bf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	while (!io.eof) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		__u64 start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		int ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		char symbol_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		char symbol_name[KSYM_NAME_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		if (io__get_hex(&io, &start) != ' ') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			read_to_eol(&io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		symbol_type = io__get_char(&io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		if (io__get_char(&io) != ' ') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 			read_to_eol(&io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		for (i = 0; i < sizeof(symbol_name); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			ch = io__get_char(&io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 			if (ch < 0 || ch == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			symbol_name[i]  = ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		symbol_name[i]  = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		err = process_symbol(arg, symbol_name, symbol_type, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	close(io.fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }