add driver 5G

hc

2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2

 kernel/tools/lib/symbol/kallsyms.c
..
..
@@ -1,8 +1,9 @@
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 // SPDX-License-Identifier: GPL-2.0
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-#include <ctype.h>
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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 <stdlib.h>
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+#include <sys/stat.h>
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+#include <fcntl.h>
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7
 
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 u8 kallsyms2elf_type(char type)
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 {
..
..
@@ -16,61 +17,62 @@
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 	return symbol_type == 'T' || symbol_type == 'W';
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 }
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19
 
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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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+
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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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+
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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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+	struct io io;
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+	char bf[BUFSIZ];
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+	int err;
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-	if (file == NULL)
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-		goto out_failure;
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+	io.fd = open(filename, O_RDONLY, 0);
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+
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+	if (io.fd < 0)
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+		return -1;
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+
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+	io__init(&io, io.fd, bf, sizeof(bf));
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45
 
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 	err = 0;
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-
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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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+	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;
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+		char symbol_name[KSYM_NAME_LEN + 1];
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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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-
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-		line[--line_len] = '\0'; /* \n */
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-
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-		len = hex2u64(line, &start);
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-
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-		/* Skip the line if we failed to parse the address. */
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-		if (!len)
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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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-		len++;
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-		if (len + 2 >= line_len)
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-			continue;
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-
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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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-
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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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+		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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-	free(line);
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-	fclose(file);
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+	close(io.fd);
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 	return err;
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-
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-out_failure:
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-	return -1;
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 }