*/
#include <stdarg.h>
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/module.h> /* for KSYM_SYMBOL_LEN */
#include <linux/types.h>
* (legacy clock framework) of the clock
* - 'Cr' For a clock, it prints the current rate of the clock
*
+ * ** Please update also Documentation/printk-formats.txt when making changes **
+ *
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64
* function pointers are really function descriptors, which contain a
* pointer to the real address.
char *pointer(const char *fmt, char *buf, char *end, void *ptr,
struct printf_spec spec)
{
- int default_width = 2 * sizeof(void *) + (spec.flags & SPECIAL ? 2 : 0);
+ const int default_width = 2 * sizeof(void *);
if (!ptr && *fmt != 'K') {
/*
case 'n':
/*
- * Since %n poses a greater security risk than utility, treat
- * it as an invalid format specifier. Warn about its use so
- * that new instances don't get added.
+ * Since %n poses a greater security risk than
+ * utility, treat it as any other invalid or
+ * unsupported format specifier.
*/
- WARN_ONCE(1, "Please remove ignored %%n in '%s'\n", fmt);
/* Fall-through */
default:
+ WARN_ONCE(1, "Please remove unsupported %%%c in format string\n", *fmt);
spec->type = FORMAT_TYPE_INVALID;
return fmt - start;
}
* @fmt: The format string to use
* @args: Arguments for the format string
*
- * This function follows C99 vsnprintf, but has some extensions:
- * %pS output the name of a text symbol with offset
- * %ps output the name of a text symbol without offset
- * %pF output the name of a function pointer with its offset
- * %pf output the name of a function pointer without its offset
- * %pB output the name of a backtrace symbol with its offset
- * %pR output the address range in a struct resource with decoded flags
- * %pr output the address range in a struct resource with raw flags
- * %pb output the bitmap with field width as the number of bits
- * %pbl output the bitmap as range list with field width as the number of bits
- * %pM output a 6-byte MAC address with colons
- * %pMR output a 6-byte MAC address with colons in reversed order
- * %pMF output a 6-byte MAC address with dashes
- * %pm output a 6-byte MAC address without colons
- * %pmR output a 6-byte MAC address without colons in reversed order
- * %pI4 print an IPv4 address without leading zeros
- * %pi4 print an IPv4 address with leading zeros
- * %pI6 print an IPv6 address with colons
- * %pi6 print an IPv6 address without colons
- * %pI6c print an IPv6 address as specified by RFC 5952
- * %pIS depending on sa_family of 'struct sockaddr *' print IPv4/IPv6 address
- * %piS depending on sa_family of 'struct sockaddr *' print IPv4/IPv6 address
- * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
- * case.
- * %*pE[achnops] print an escaped buffer
- * %*ph[CDN] a variable-length hex string with a separator (supports up to 64
- * bytes of the input)
- * %pC output the name (Common Clock Framework) or address (legacy clock
- * framework) of a clock
- * %pCn output the name (Common Clock Framework) or address (legacy clock
- * framework) of a clock
- * %pCr output the current rate of a clock
- * %n is ignored
+ * This function generally follows C99 vsnprintf, but has some
+ * extensions and a few limitations:
+ *
+ * %n is unsupported
+ * %p* is handled by pointer()
*
- * ** Please update Documentation/printk-formats.txt when making changes **
+ * See pointer() or Documentation/printk-formats.txt for more
+ * extensive description.
+ *
+ * ** Please update the documentation in both places when making changes **
*
* The return value is the number of characters which would
* be generated for the given input, excluding the trailing
break;
case FORMAT_TYPE_INVALID:
- if (str < end)
- *str = '%';
- ++str;
- break;
+ /*
+ * Presumably the arguments passed gcc's type
+ * checking, but there is no safe or sane way
+ * for us to continue parsing the format and
+ * fetching from the va_list; the remaining
+ * specifiers and arguments would be out of
+ * sync.
+ */
+ goto out;
default:
switch (spec.type) {
}
}
+out:
if (size > 0) {
if (str < end)
*str = '\0';
switch (spec.type) {
case FORMAT_TYPE_NONE:
- case FORMAT_TYPE_INVALID:
case FORMAT_TYPE_PERCENT_CHAR:
break;
+ case FORMAT_TYPE_INVALID:
+ goto out;
case FORMAT_TYPE_WIDTH:
case FORMAT_TYPE_PRECISION:
}
}
+out:
return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
#undef save_arg
}
char *str, *end;
const char *args = (const char *)bin_buf;
- if (WARN_ON_ONCE((int) size < 0))
+ if (WARN_ON_ONCE(size > INT_MAX))
return 0;
str = buf;
break;
case FORMAT_TYPE_PERCENT_CHAR:
- case FORMAT_TYPE_INVALID:
if (str < end)
*str = '%';
++str;
break;
+ case FORMAT_TYPE_INVALID:
+ goto out;
+
default: {
unsigned long long num;
} /* switch(spec.type) */
} /* while(*fmt) */
+out:
if (size > 0) {
if (str < end)
*str = '\0';
Code Review / kvmfornfv.git / blobdiff