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-rw-r--r--tools/lib/symbol/kallsyms.c78
-rw-r--r--tools/lib/symbol/kallsyms.h29
2 files changed, 107 insertions, 0 deletions
diff --git a/tools/lib/symbol/kallsyms.c b/tools/lib/symbol/kallsyms.c
new file mode 100644
index 000000000..e335ac2b9
--- /dev/null
+++ b/tools/lib/symbol/kallsyms.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "symbol/kallsyms.h"
+#include "api/io.h"
+#include <stdio.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+u8 kallsyms2elf_type(char type)
+{
+ type = tolower(type);
+ return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
+}
+
+bool kallsyms__is_function(char symbol_type)
+{
+ symbol_type = toupper(symbol_type);
+ return symbol_type == 'T' || symbol_type == 'W';
+}
+
+static void read_to_eol(struct io *io)
+{
+ int ch;
+
+ for (;;) {
+ ch = io__get_char(io);
+ if (ch < 0 || ch == '\n')
+ return;
+ }
+}
+
+int kallsyms__parse(const char *filename, void *arg,
+ int (*process_symbol)(void *arg, const char *name,
+ char type, u64 start))
+{
+ struct io io;
+ char bf[BUFSIZ];
+ int err;
+
+ io.fd = open(filename, O_RDONLY, 0);
+
+ if (io.fd < 0)
+ return -1;
+
+ io__init(&io, io.fd, bf, sizeof(bf));
+
+ err = 0;
+ while (!io.eof) {
+ __u64 start;
+ int ch;
+ size_t i;
+ char symbol_type;
+ char symbol_name[KSYM_NAME_LEN + 1];
+
+ if (io__get_hex(&io, &start) != ' ') {
+ read_to_eol(&io);
+ continue;
+ }
+ symbol_type = io__get_char(&io);
+ if (io__get_char(&io) != ' ') {
+ read_to_eol(&io);
+ continue;
+ }
+ for (i = 0; i < sizeof(symbol_name); i++) {
+ ch = io__get_char(&io);
+ if (ch < 0 || ch == '\n')
+ break;
+ symbol_name[i] = ch;
+ }
+ symbol_name[i] = '\0';
+
+ err = process_symbol(arg, symbol_name, symbol_type, start);
+ if (err)
+ break;
+ }
+
+ close(io.fd);
+ return err;
+}
diff --git a/tools/lib/symbol/kallsyms.h b/tools/lib/symbol/kallsyms.h
new file mode 100644
index 000000000..72ab98704
--- /dev/null
+++ b/tools/lib/symbol/kallsyms.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __TOOLS_KALLSYMS_H_
+#define __TOOLS_KALLSYMS_H_ 1
+
+#include <elf.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+
+#ifndef KSYM_NAME_LEN
+#define KSYM_NAME_LEN 256
+#endif
+
+static inline u8 kallsyms2elf_binding(char type)
+{
+ if (type == 'W')
+ return STB_WEAK;
+
+ return isupper(type) ? STB_GLOBAL : STB_LOCAL;
+}
+
+u8 kallsyms2elf_type(char type);
+
+bool kallsyms__is_function(char symbol_type);
+
+int kallsyms__parse(const char *filename, void *arg,
+ int (*process_symbol)(void *arg, const char *name,
+ char type, u64 start));
+
+#endif /* __TOOLS_KALLSYMS_H_ */