::
+ %pS versatile_init+0x0/0x110
+ %ps versatile_init
%pF versatile_init+0x0/0x110
%pf versatile_init
- %pS versatile_init+0x0/0x110
%pSR versatile_init+0x9/0x110
(with __builtin_extract_return_addr() translation)
- %ps versatile_init
%pB prev_fn_of_versatile_init+0x88/0x88
- The ``F`` and ``f`` specifiers are for printing function pointers,
- for example, f->func, &gettimeofday. They have the same result as
- ``S`` and ``s`` specifiers. But they do an extra conversion on
- ia64, ppc64 and parisc64 architectures where the function pointers
- are actually function descriptors.
+
-format. They result in the symbol name with (``S``) or without (``s``)
+ The ``S`` and ``s`` specifiers are used for printing a pointer in symbolic
++format. They result in the symbol name with (S) or without (s)
+ offsets. If KALLSYMS are disabled then the symbol address is printed instead.
- The ``S`` and ``s`` specifiers can be used for printing symbols
- from direct addresses, for example, __builtin_return_address(0),
- (void *)regs->ip. They result in the symbol name with (S) or
- without (s) offsets. If KALLSYMS are disabled then the symbol
- address is printed instead.
+ Note, that the ``F`` and ``f`` specifiers are identical to ``S`` (``s``)
+ and thus deprecated. We have ``F`` and ``f`` because on ia64, ppc64 and
+ parisc64 function pointers are indirect and, in fact, are function
+ descriptors, which require additional dereferencing before we can lookup
+ the symbol. As of now, ``S`` and ``s`` perform dereferencing on those
+ platforms (when needed), so ``F`` and ``f`` exist for compatibility
+ reasons only.
The ``B`` specifier results in the symbol name with offsets and should be
used when printing stack backtraces. The specifier takes into
consideration the effect of compiler optimisations which may occur
-when tail-call``s are used and marked with the noreturn GCC attribute.
+when tail-calls are used and marked with the noreturn GCC attribute.
- Examples::
-
- printk("Going to call: %pF\n", gettimeofday);
- printk("Going to call: %pF\n", p->func);
- printk("%s: called from %pS\n", __func__, (void *)_RET_IP_);
- printk("%s: called from %pS\n", __func__,
- (void *)__builtin_return_address(0));
- printk("Faulted at %pS\n", (void *)regs->ip);
- printk(" %s%pB\n", (reliable ? "" : "? "), (void *)*stack);
-
Kernel Pointers
-===============
+---------------
::
#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
-#ifndef CONFIG_64BIT
-# define KALLSYM_FMT "%08lx"
-#else
-# define KALLSYM_FMT "%016lx"
-#endif
-
struct module;
+ static inline int is_kernel_inittext(unsigned long addr)
+ {
+ if (addr >= (unsigned long)_sinittext
+ && addr <= (unsigned long)_einittext)
+ return 1;
+ return 0;
+ }
+
+ static inline int is_kernel_text(unsigned long addr)
+ {
+ if ((addr >= (unsigned long)_stext && addr <= (unsigned long)_etext) ||
+ arch_is_kernel_text(addr))
+ return 1;
+ return in_gate_area_no_mm(addr);
+ }
+
+ static inline int is_kernel(unsigned long addr)
+ {
+ if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
+ return 1;
+ return in_gate_area_no_mm(addr);
+ }
+
+ static inline int is_ksym_addr(unsigned long addr)
+ {
+ if (IS_ENABLED(CONFIG_KALLSYMS_ALL))
+ return is_kernel(addr);
+
+ return is_kernel_text(addr) || is_kernel_inittext(addr);
+ }
+
+ static inline void *dereference_symbol_descriptor(void *ptr)
+ {
+ #ifdef HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR
+ struct module *mod;
+
+ ptr = dereference_kernel_function_descriptor(ptr);
+ if (is_ksym_addr((unsigned long)ptr))
+ return ptr;
+
+ preempt_disable();
+ mod = __module_address((unsigned long)ptr);
+ preempt_enable();
+
+ if (mod)
+ ptr = dereference_module_function_descriptor(mod, ptr);
+ #endif
+ return ptr;
+ }
+
#ifdef CONFIG_KALLSYMS
/* Lookup the address for a symbol. Returns 0 if not found. */
unsigned long kallsyms_lookup_name(const char *name);
static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
{
+ static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
+
+ if (!__ratelimit(&ratelimit))
+ return;
+
printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
- printk("->handle_irq(): %p, ", desc->handle_irq);
- print_symbol("%s\n", (unsigned long)desc->handle_irq);
- printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
- print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
+ printk("->handle_irq(): %p, %pS\n",
+ desc->handle_irq, desc->handle_irq);
+ printk("->irq_data.chip(): %p, %pS\n",
+ desc->irq_data.chip, desc->irq_data.chip);
printk("->action(): %p\n", desc->action);
if (desc->action) {
- printk("->action->handler(): %p, ", desc->action->handler);
- print_symbol("%s\n", (unsigned long)desc->action->handler);
+ printk("->action->handler(): %p, %pS\n",
+ desc->action->handler, desc->action->handler);
}
___P(IRQ_LEVEL);
for (my $count = $linenr; $count <= $lc; $count++) {
my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
$fmt =~ s/%%//g;
- if ($fmt =~ /(\%[\*\d\.]*p(?![\WFfSsBKRraEhMmIiUDdgVCbGNOx]).)/) {
- if ($fmt =~ /(\%[\*\d\.]*p(?![\WSsBKRraEhMmIiUDdgVCbGNO]).)/) {
++ if ($fmt =~ /(\%[\*\d\.]*p(?![\WSsBKRraEhMmIiUDdgVCbGNOx]).)/) {
$bad_extension = $1;
last;
}
projects / users / jedix / linux-maple.git / commitdiff