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b8a94bfb33
Rust symbols can become quite long due to namespacing introduced
by modules, types, traits, generics, etc. For instance,
the following code:
pub mod my_module {
pub struct MyType;
pub struct MyGenericType<T>(T);
pub trait MyTrait {
fn my_method() -> u32;
}
impl MyTrait for MyGenericType<MyType> {
fn my_method() -> u32 {
42
}
}
}
generates a symbol of length 96 when using the upcoming v0 mangling scheme:
_RNvXNtCshGpAVYOtgW1_7example9my_moduleINtB2_13MyGenericTypeNtB2_6MyTypeENtB2_7MyTrait9my_method
At the moment, Rust symbols may reach up to 300 in length.
Setting 512 as the maximum seems like a reasonable choice to
keep some headroom.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
35 lines
646 B
C
35 lines
646 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LIBLOCKDEP_LINUX_KALLSYMS_H_
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#define _LIBLOCKDEP_LINUX_KALLSYMS_H_
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#include <linux/kernel.h>
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#include <stdio.h>
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#include <unistd.h>
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#define KSYM_NAME_LEN 512
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struct module;
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static inline const char *kallsyms_lookup(unsigned long addr,
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unsigned long *symbolsize,
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unsigned long *offset,
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char **modname, char *namebuf)
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{
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return NULL;
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}
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#include <execinfo.h>
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#include <stdlib.h>
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static inline void print_ip_sym(const char *loglvl, unsigned long ip)
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{
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char **name;
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name = backtrace_symbols((void **)&ip, 1);
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dprintf(STDOUT_FILENO, "%s\n", *name);
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free(name);
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}
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#endif
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