From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- tools/lib/symbol/kallsyms.c | 78 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 tools/lib/symbol/kallsyms.c (limited to 'tools/lib/symbol/kallsyms.c') 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 +#include +#include + +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; +} -- cgit v1.2.3