#include <asm/div64.h>
#include <asm/sections.h> /* for dereference_function_descriptor() */
-/* Works only for digits and letters, but small and fast */
-#define TOLOWER(x) ((x) | 0x20)
-
-static unsigned int simple_guess_base(const char *cp)
-{
- if (cp[0] == '0') {
- if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
- return 16;
- else
- return 8;
- } else {
- return 10;
- }
-}
+#include "kstrtox.h"
/**
* simple_strtoull - convert a string to an unsigned long long
*/
unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
{
- unsigned long long result = 0;
-
- if (!base)
- base = simple_guess_base(cp);
-
- if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
+ unsigned long long result;
+ unsigned int rv;
- while (isxdigit(*cp)) {
- unsigned int value;
+ cp = _parse_integer_fixup_radix(cp, &base);
+ rv = _parse_integer(cp, base, &result);
+ /* FIXME */
+ cp += (rv & ~KSTRTOX_OVERFLOW);
- value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
- if (value >= base)
- break;
- result = result * base + value;
- cp++;
- }
if (endp)
*endp = (char *)cp;
return simple_strtoull(cp, endp, base);
}
+EXPORT_SYMBOL(simple_strtoll);
-/**
- * strict_strtoul - convert a string to an unsigned long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoul converts a string to an unsigned long only if the
- * string is really an unsigned long string, any string containing
- * any invalid char at the tail will be rejected and -EINVAL is returned,
- * only a newline char at the tail is acceptible because people generally
- * change a module parameter in the following way:
- *
- * echo 1024 > /sys/module/e1000/parameters/copybreak
- *
- * echo will append a newline to the tail.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- *
- * simple_strtoul just ignores the successive invalid characters and
- * return the converted value of prefix part of the string.
- */
-int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
-{
- char *tail;
- unsigned long val;
- size_t len;
-
- *res = 0;
- len = strlen(cp);
- if (len == 0)
- return -EINVAL;
-
- val = simple_strtoul(cp, &tail, base);
- if (tail == cp)
- return -EINVAL;
-
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
- *res = val;
- return 0;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL(strict_strtoul);
-
-/**
- * strict_strtol - convert a string to a long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtol is similiar to strict_strtoul, but it allows the first
- * character of a string is '-'.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- */
-int strict_strtol(const char *cp, unsigned int base, long *res)
-{
- int ret;
- if (*cp == '-') {
- ret = strict_strtoul(cp + 1, base, (unsigned long *)res);
- if (!ret)
- *res = -(*res);
- } else {
- ret = strict_strtoul(cp, base, (unsigned long *)res);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(strict_strtol);
-
-/**
- * strict_strtoull - convert a string to an unsigned long long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoull converts a string to an unsigned long long only if the
- * string is really an unsigned long long string, any string containing
- * any invalid char at the tail will be rejected and -EINVAL is returned,
- * only a newline char at the tail is acceptible because people generally
- * change a module parameter in the following way:
- *
- * echo 1024 > /sys/module/e1000/parameters/copybreak
- *
- * echo will append a newline to the tail of the string.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- *
- * simple_strtoull just ignores the successive invalid characters and
- * return the converted value of prefix part of the string.
- */
-int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
-{
- char *tail;
- unsigned long long val;
- size_t len;
-
- *res = 0;
- len = strlen(cp);
- if (len == 0)
- return -EINVAL;
-
- val = simple_strtoull(cp, &tail, base);
- if (tail == cp)
- return -EINVAL;
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
- *res = val;
- return 0;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL(strict_strtoull);
-
-/**
- * strict_strtoll - convert a string to a long long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoll is similiar to strict_strtoull, but it allows the first
- * character of a string is '-'.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- */
-int strict_strtoll(const char *cp, unsigned int base, long long *res)
-{
- int ret;
- if (*cp == '-') {
- ret = strict_strtoull(cp + 1, base, (unsigned long long *)res);
- if (!ret)
- *res = -(*res);
- } else {
- ret = strict_strtoull(cp, base, (unsigned long long *)res);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(strict_strtoll);
-
-static int skip_atoi(const char **s)
+static noinline_for_stack
+int skip_atoi(const char **s)
{
int i = 0;
/* Formats correctly any integer in [0,99999].
* Outputs from one to five digits depending on input.
* On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
-static char *put_dec_trunc(char *buf, unsigned q)
+static noinline_for_stack
+char *put_dec_trunc(char *buf, unsigned q)
{
unsigned d3, d2, d1, d0;
d1 = (q>>4) & 0xf;
return buf;
}
/* Same with if's removed. Always emits five digits */
-static char *put_dec_full(char *buf, unsigned q)
+static noinline_for_stack
+char *put_dec_full(char *buf, unsigned q)
{
/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
/* but anyway, gcc produces better code with full-sized ints */
return buf;
}
/* No inlining helps gcc to use registers better */
-static noinline char *put_dec(char *buf, unsigned long long num)
+static noinline_for_stack
+char *put_dec(char *buf, unsigned long long num)
{
while (1) {
unsigned rem;
};
struct printf_spec {
- u16 type;
- s16 field_width; /* width of output field */
+ u8 type; /* format_type enum */
u8 flags; /* flags to number() */
- u8 base;
- s8 precision; /* # of digits/chars */
- u8 qualifier;
+ u8 base; /* number base, 8, 10 or 16 only */
+ u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */
+ s16 field_width; /* width of output field */
+ s16 precision; /* # of digits/chars */
};
-static char *number(char *buf, char *end, unsigned long long num,
- struct printf_spec spec)
+static noinline_for_stack
+char *number(char *buf, char *end, unsigned long long num,
+ struct printf_spec spec)
{
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
return buf;
}
-static char *string(char *buf, char *end, const char *s, struct printf_spec spec)
+static noinline_for_stack
+char *string(char *buf, char *end, const char *s, struct printf_spec spec)
{
int len, i;
return buf;
}
-static char *symbol_string(char *buf, char *end, void *ptr,
- struct printf_spec spec, char ext)
+static noinline_for_stack
+char *symbol_string(char *buf, char *end, void *ptr,
+ struct printf_spec spec, char ext)
{
unsigned long value = (unsigned long) ptr;
#ifdef CONFIG_KALLSYMS
char sym[KSYM_SYMBOL_LEN];
- if (ext != 'f' && ext != 's')
+ if (ext == 'B')
+ sprint_backtrace(sym, value);
+ else if (ext != 'f' && ext != 's')
sprint_symbol(sym, value);
else
kallsyms_lookup(value, NULL, NULL, NULL, sym);
#endif
}
-static char *resource_string(char *buf, char *end, struct resource *res,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *resource_string(char *buf, char *end, struct resource *res,
+ struct printf_spec spec, const char *fmt)
{
#ifndef IO_RSRC_PRINTK_SIZE
#define IO_RSRC_PRINTK_SIZE 6
.precision = -1,
.flags = SPECIAL | SMALL | ZEROPAD,
};
+ static const struct printf_spec bus_spec = {
+ .base = 16,
+ .field_width = 2,
+ .precision = -1,
+ .flags = SMALL | ZEROPAD,
+ };
static const struct printf_spec dec_spec = {
.base = 10,
.precision = -1,
* 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */
#define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4)
#define FLAG_BUF_SIZE (2 * sizeof(res->flags))
-#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]")
+#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]")
#define RAW_BUF_SIZE sizeof("[mem - flags 0x]")
char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
} else if (res->flags & IORESOURCE_DMA) {
p = string(p, pend, "dma ", str_spec);
specp = &dec_spec;
+ } else if (res->flags & IORESOURCE_BUS) {
+ p = string(p, pend, "bus ", str_spec);
+ specp = &bus_spec;
} else {
p = string(p, pend, "??? ", str_spec);
specp = &mem_spec;
p = string(p, pend, " 64bit", str_spec);
if (res->flags & IORESOURCE_PREFETCH)
p = string(p, pend, " pref", str_spec);
+ if (res->flags & IORESOURCE_WINDOW)
+ p = string(p, pend, " window", str_spec);
if (res->flags & IORESOURCE_DISABLED)
p = string(p, pend, " disabled", str_spec);
} else {
return string(buf, end, sym, spec);
}
-static char *mac_address_string(char *buf, char *end, u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *mac_address_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")];
char *p = mac_addr;
}
for (i = 0; i < 6; i++) {
- p = pack_hex_byte(p, addr[i]);
+ p = hex_byte_pack(p, addr[i]);
if (fmt[0] == 'M' && i != 5)
*p++ = separator;
}
return string(buf, end, mac_addr, spec);
}
-static char *ip4_string(char *p, const u8 *addr, const char *fmt)
+static noinline_for_stack
+char *ip4_string(char *p, const u8 *addr, const char *fmt)
{
int i;
bool leading_zeros = (fmt[0] == 'i');
return p;
}
-static char *ip6_compressed_string(char *p, const char *addr)
+static noinline_for_stack
+char *ip6_compressed_string(char *p, const char *addr)
{
int i, j, range;
unsigned char zerolength[8];
colonpos = i;
}
}
+ if (longest == 1) /* don't compress a single 0 */
+ colonpos = -1;
/* emit address */
for (i = 0; i < range; i++) {
lo = word & 0xff;
if (hi) {
if (hi > 0x0f)
- p = pack_hex_byte(p, hi);
+ p = hex_byte_pack(p, hi);
else
*p++ = hex_asc_lo(hi);
- p = pack_hex_byte(p, lo);
+ p = hex_byte_pack(p, lo);
}
else if (lo > 0x0f)
- p = pack_hex_byte(p, lo);
+ p = hex_byte_pack(p, lo);
else
*p++ = hex_asc_lo(lo);
needcolon = true;
return p;
}
-static char *ip6_string(char *p, const char *addr, const char *fmt)
+static noinline_for_stack
+char *ip6_string(char *p, const char *addr, const char *fmt)
{
int i;
for (i = 0; i < 8; i++) {
- p = pack_hex_byte(p, *addr++);
- p = pack_hex_byte(p, *addr++);
+ p = hex_byte_pack(p, *addr++);
+ p = hex_byte_pack(p, *addr++);
if (fmt[0] == 'I' && i != 7)
*p++ = ':';
}
return p;
}
-static char *ip6_addr_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *ip6_addr_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
return string(buf, end, ip6_addr, spec);
}
-static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *ip4_addr_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char ip4_addr[sizeof("255.255.255.255")];
return string(buf, end, ip4_addr, spec);
}
-static char *uuid_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *uuid_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
char *p = uuid;
}
for (i = 0; i < 16; i++) {
- p = pack_hex_byte(p, addr[index[i]]);
+ p = hex_byte_pack(p, addr[index[i]]);
switch (i) {
case 3:
case 5:
return string(buf, end, uuid, spec);
}
+int kptr_restrict __read_mostly;
+
/*
* Show a '%p' thing. A kernel extension is that the '%p' is followed
* by an extra set of alphanumeric characters that are extended format
* - 'f' For simple symbolic function names without offset
* - 'S' For symbolic direct pointers with offset
* - 's' For symbolic direct pointers without offset
+ * - 'B' For backtraced symbolic direct pointers with offset
* - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
* - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
* - 'M' For a 6-byte MAC address, it prints the address in the
* IPv4 uses dot-separated decimal with leading 0's (010.123.045.006)
* - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order
* - 'I6c' for IPv6 addresses printed as specified by
- * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00
+ * http://tools.ietf.org/html/rfc5952
* - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form
* "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
* Options for %pU are:
* [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15]
* little endian output byte order is:
* [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15]
+ * - 'V' For a struct va_format which contains a format string * and va_list *,
+ * call vsnprintf(->format, *->va_list).
+ * Implements a "recursive vsnprintf".
+ * Do not use this feature without some mechanism to verify the
+ * correctness of the format string and va_list arguments.
+ * - 'K' For a kernel pointer that should be hidden from unprivileged users
*
* 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.
*/
-static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
- struct printf_spec spec)
+static noinline_for_stack
+char *pointer(const char *fmt, char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
- if (!ptr)
+ if (!ptr && *fmt != 'K') {
+ /*
+ * Print (null) with the same width as a pointer so it makes
+ * tabular output look nice.
+ */
+ if (spec.field_width == -1)
+ spec.field_width = 2 * sizeof(void *);
return string(buf, end, "(null)", spec);
+ }
switch (*fmt) {
case 'F':
/* Fallthrough */
case 'S':
case 's':
+ case 'B':
return symbol_string(buf, end, ptr, spec, *fmt);
case 'R':
case 'r':
break;
case 'U':
return uuid_string(buf, end, ptr, spec, fmt);
+ case 'V':
+ return buf + vsnprintf(buf, end > buf ? end - buf : 0,
+ ((struct va_format *)ptr)->fmt,
+ *(((struct va_format *)ptr)->va));
+ case 'K':
+ /*
+ * %pK cannot be used in IRQ context because its test
+ * for CAP_SYSLOG would be meaningless.
+ */
+ if (in_irq() || in_serving_softirq() || in_nmi()) {
+ if (spec.field_width == -1)
+ spec.field_width = 2 * sizeof(void *);
+ return string(buf, end, "pK-error", spec);
+ }
+ if (!((kptr_restrict == 0) ||
+ (kptr_restrict == 1 &&
+ has_capability_noaudit(current, CAP_SYSLOG))))
+ ptr = NULL;
+ break;
}
spec.flags |= SMALL;
if (spec.field_width == -1) {
- spec.field_width = 2*sizeof(void *);
+ spec.field_width = 2 * sizeof(void *);
spec.flags |= ZEROPAD;
}
spec.base = 16;
* @precision: precision of a number
* @qualifier: qualifier of a number (long, size_t, ...)
*/
-static int format_decode(const char *fmt, struct printf_spec *spec)
+static noinline_for_stack
+int format_decode(const char *fmt, struct printf_spec *spec)
{
const char *start = fmt;
qualifier:
/* get the conversion qualifier */
spec->qualifier = -1;
- if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
- TOLOWER(*fmt) == 'z' || *fmt == 't') {
+ if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+ _tolower(*fmt) == 'z' || *fmt == 't') {
spec->qualifier = *fmt++;
if (unlikely(spec->qualifier == *fmt)) {
if (spec->qualifier == 'l') {
spec->type = FORMAT_TYPE_LONG;
else
spec->type = FORMAT_TYPE_ULONG;
- } else if (TOLOWER(spec->qualifier) == 'z') {
+ } else if (_tolower(spec->qualifier) == 'z') {
spec->type = FORMAT_TYPE_SIZE_T;
} else if (spec->qualifier == 't') {
spec->type = FORMAT_TYPE_PTRDIFF;
* %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
* %pM output a 6-byte MAC address with colons
* %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
- * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00
+ * %pI6c print an IPv6 address as specified by RFC 5952
* %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
* case.
* %n is ignored
* return is greater than or equal to @size, the resulting
* string is truncated.
*
- * Call this function if you are already dealing with a va_list.
- * You probably want snprintf() instead.
+ * If you're not already dealing with a va_list consider using snprintf().
*/
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
if (qualifier == 'l') {
long *ip = va_arg(args, long *);
*ip = (str - buf);
- } else if (TOLOWER(qualifier) == 'z') {
+ } else if (_tolower(qualifier) == 'z') {
size_t *ip = va_arg(args, size_t *);
*ip = (str - buf);
} else {
* @args: Arguments for the format string
*
* The return value is the number of characters which have been written into
- * the @buf not including the trailing '\0'. If @size is <= 0 the function
+ * the @buf not including the trailing '\0'. If @size is == 0 the function
* returns 0.
*
- * Call this function if you are already dealing with a va_list.
- * You probably want scnprintf() instead.
+ * If you're not already dealing with a va_list consider using scnprintf().
*
* See the vsnprintf() documentation for format string extensions over C99.
*/
i = vsnprintf(buf, size, fmt, args);
- return (i >= size) ? (size - 1) : i;
+ if (likely(i < size))
+ return i;
+ if (size != 0)
+ return size - 1;
+ return 0;
}
EXPORT_SYMBOL(vscnprintf);
* @...: Arguments for the format string
*
* The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0.
+ * the trailing '\0'. If @size is == 0 the function returns 0.
*/
int scnprintf(char *buf, size_t size, const char *fmt, ...)
int i;
va_start(args, fmt);
- i = vsnprintf(buf, size, fmt, args);
+ i = vscnprintf(buf, size, fmt, args);
va_end(args);
- return (i >= size) ? (size - 1) : i;
+ return i;
}
EXPORT_SYMBOL(scnprintf);
* into @buf. Use vsnprintf() or vscnprintf() in order to avoid
* buffer overflows.
*
- * Call this function if you are already dealing with a va_list.
- * You probably want sprintf() instead.
+ * If you're not already dealing with a va_list consider using sprintf().
*
* See the vsnprintf() documentation for format string extensions over C99.
*/
void *skip_arg;
if (qualifier == 'l')
skip_arg = va_arg(args, long *);
- else if (TOLOWER(qualifier) == 'z')
+ else if (_tolower(qualifier) == 'z')
skip_arg = va_arg(args, size_t *);
else
skip_arg = va_arg(args, int *);
/* get conversion qualifier */
qualifier = -1;
- if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
- TOLOWER(*fmt) == 'z') {
+ if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+ _tolower(*fmt) == 'z') {
qualifier = *fmt++;
if (unlikely(qualifier == *fmt)) {
if (qualifier == 'h') {
{
char *s = (char *)va_arg(args, char *);
if (field_width == -1)
- field_width = SHORT_MAX;
+ field_width = SHRT_MAX;
/* first, skip leading white space in buffer */
str = skip_spaces(str);
Code Review / linux-2.6.git / blobdiff