kernel: when KALLSYMS is disabled, print module address + size for matching backtrace entries

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45655

target/linux/generic/patches-3.18/205-backtrace_module_info.patch

@@ -0,0 +1,38 @@
+--- a/lib/vsprintf.c
++++ b/lib/vsprintf.c
+@@ -613,10 +613,12 @@ static noinline_for_stack
+ char *symbol_string(char *buf, char *end, void *ptr,
+ 		    struct printf_spec spec, const char *fmt)
+ {
++#ifndef CONFIG_KALLSYMS
++	struct module *mod;
++#endif
+ 	unsigned long value;
+-#ifdef CONFIG_KALLSYMS
+ 	char sym[KSYM_SYMBOL_LEN];
+-#endif
++	int len;
+ 
+ 	if (fmt[1] == 'R')
+ 		ptr = __builtin_extract_return_addr(ptr);
+@@ -630,13 +632,15 @@ char *symbol_string(char *buf, char *end
+ 	else
+ 		sprint_symbol_no_offset(sym, value);
+ 
+-	return string(buf, end, sym, spec);
+ #else
+-	spec.field_width = 2 * sizeof(void *);
+-	spec.flags |= SPECIAL | SMALL | ZEROPAD;
+-	spec.base = 16;
++	len = snprintf(sym, sizeof(sym), "0x%lx", value);
++
++	mod = __module_address(value);
++	if (mod)
++		snprintf(sym + len, sizeof(sym) - len, " [%s@%p+0x%x]",
++			 mod->name, mod->module_core, mod->core_size);
+ 
+-	return number(buf, end, value, spec);
++	return string(buf, end, sym, spec);
+ #endif
+ }
+ 

target/linux/generic/patches-4.0/205-backtrace_module_info.patch

@@ -0,0 +1,38 @@
+--- a/lib/vsprintf.c
++++ b/lib/vsprintf.c
+@@ -614,10 +614,12 @@ static noinline_for_stack
+ char *symbol_string(char *buf, char *end, void *ptr,
+ 		    struct printf_spec spec, const char *fmt)
+ {
++#ifndef CONFIG_KALLSYMS
++	struct module *mod;
++#endif
+ 	unsigned long value;
+-#ifdef CONFIG_KALLSYMS
+ 	char sym[KSYM_SYMBOL_LEN];
+-#endif
++	int len;
+ 
+ 	if (fmt[1] == 'R')
+ 		ptr = __builtin_extract_return_addr(ptr);
+@@ -631,13 +633,15 @@ char *symbol_string(char *buf, char *end
+ 	else
+ 		sprint_symbol_no_offset(sym, value);
+ 
+-	return string(buf, end, sym, spec);
+ #else
+-	spec.field_width = 2 * sizeof(void *);
+-	spec.flags |= SPECIAL | SMALL | ZEROPAD;
+-	spec.base = 16;
++	len = snprintf(sym, sizeof(sym), "0x%lx", value);
++
++	mod = __module_address(value);
++	if (mod)
++		snprintf(sym + len, sizeof(sym) - len, " [%s@%p+0x%x]",
++			 mod->name, mod->module_core, mod->core_size);
+ 
+-	return number(buf, end, value, spec);
++	return string(buf, end, sym, spec);
+ #endif
+ }
+