mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 19:26:51 +07:00
4796dd200d
Using %ps in a printk format will sometimes fail silently and print the
empty string if the address passed in does not match a symbol that
kallsyms knows about. But using %pS will fall back to printing the full
address if kallsyms can't find the symbol. Make %ps act the same as %pS
by falling back to printing the address.
While we're here also make %ps print the module that a symbol comes from
so that it matches what %pS already does. Take this simple function for
example (in a module):
static void test_printk(void)
{
int test;
pr_info("with pS: %pS\n", &test);
pr_info("with ps: %ps\n", &test);
}
Before this patch:
with pS: 0xdff7df44
with ps:
After this patch:
with pS: 0xdff7df44
with ps: 0xdff7df44
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/* Rewritten and vastly simplified by Rusty Russell for in-kernel
|
|
* module loader:
|
|
* Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
|
|
*/
|
|
#ifndef _LINUX_KALLSYMS_H
|
|
#define _LINUX_KALLSYMS_H
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/stddef.h>
|
|
|
|
#define KSYM_NAME_LEN 128
|
|
#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
|
|
2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
|
|
|
|
struct module;
|
|
|
|
#ifdef CONFIG_KALLSYMS
|
|
/* Lookup the address for a symbol. Returns 0 if not found. */
|
|
unsigned long kallsyms_lookup_name(const char *name);
|
|
|
|
/* Call a function on each kallsyms symbol in the core kernel */
|
|
int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
|
|
unsigned long),
|
|
void *data);
|
|
|
|
extern int kallsyms_lookup_size_offset(unsigned long addr,
|
|
unsigned long *symbolsize,
|
|
unsigned long *offset);
|
|
|
|
/* Lookup an address. modname is set to NULL if it's in the kernel. */
|
|
const char *kallsyms_lookup(unsigned long addr,
|
|
unsigned long *symbolsize,
|
|
unsigned long *offset,
|
|
char **modname, char *namebuf);
|
|
|
|
/* Look up a kernel symbol and return it in a text buffer. */
|
|
extern int sprint_symbol(char *buffer, unsigned long address);
|
|
extern int sprint_symbol_no_offset(char *buffer, unsigned long address);
|
|
extern int sprint_backtrace(char *buffer, unsigned long address);
|
|
|
|
/* Look up a kernel symbol and print it to the kernel messages. */
|
|
extern void __print_symbol(const char *fmt, unsigned long address);
|
|
|
|
int lookup_symbol_name(unsigned long addr, char *symname);
|
|
int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
|
|
|
|
#else /* !CONFIG_KALLSYMS */
|
|
|
|
static inline unsigned long kallsyms_lookup_name(const char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
|
|
struct module *,
|
|
unsigned long),
|
|
void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int kallsyms_lookup_size_offset(unsigned long addr,
|
|
unsigned long *symbolsize,
|
|
unsigned long *offset)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline const char *kallsyms_lookup(unsigned long addr,
|
|
unsigned long *symbolsize,
|
|
unsigned long *offset,
|
|
char **modname, char *namebuf)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int sprint_symbol(char *buffer, unsigned long addr)
|
|
{
|
|
*buffer = '\0';
|
|
return 0;
|
|
}
|
|
|
|
static inline int sprint_symbol_no_offset(char *buffer, unsigned long addr)
|
|
{
|
|
*buffer = '\0';
|
|
return 0;
|
|
}
|
|
|
|
static inline int sprint_backtrace(char *buffer, unsigned long addr)
|
|
{
|
|
*buffer = '\0';
|
|
return 0;
|
|
}
|
|
|
|
static inline int lookup_symbol_name(unsigned long addr, char *symname)
|
|
{
|
|
return -ERANGE;
|
|
}
|
|
|
|
static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
|
|
{
|
|
return -ERANGE;
|
|
}
|
|
|
|
/* Stupid that this does nothing, but I didn't create this mess. */
|
|
#define __print_symbol(fmt, addr)
|
|
#endif /*CONFIG_KALLSYMS*/
|
|
|
|
/* This macro allows us to keep printk typechecking */
|
|
static __printf(1, 2)
|
|
void __check_printsym_format(const char *fmt, ...)
|
|
{
|
|
}
|
|
|
|
static inline void print_symbol(const char *fmt, unsigned long addr)
|
|
{
|
|
__check_printsym_format(fmt, "");
|
|
__print_symbol(fmt, (unsigned long)
|
|
__builtin_extract_return_addr((void *)addr));
|
|
}
|
|
|
|
static inline void print_ip_sym(unsigned long ip)
|
|
{
|
|
printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
|
|
}
|
|
|
|
#endif /*_LINUX_KALLSYMS_H*/
|