mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 18:09:57 +00:00
![Andrey Konovalov](/assets/img/avatar_default.png)
With the intoduction of hardware tag-based KASAN some kernel checks of this kind: ifdef CONFIG_KASAN will be updated to: if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) x86 and s390 use a trick to #undef CONFIG_KASAN for some of the code that isn't linked with KASAN runtime and shouldn't have any KASAN annotations. Also #undef CONFIG_KASAN_GENERIC with CONFIG_KASAN. Link: https://lkml.kernel.org/r/9d84bfaaf8fabe0fc89f913c9e420a30bd31a260.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Marco Elver <elver@google.com> Acked-by: Vasily Gorbik <gor@linux.ibm.com> Reviewed-by: Alexander Potapenko <glider@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
140 lines
2.2 KiB
C
140 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/ctype.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#undef CONFIG_KASAN
|
|
#undef CONFIG_KASAN_GENERIC
|
|
#include "../lib/string.c"
|
|
|
|
int strncmp(const char *cs, const char *ct, size_t count)
|
|
{
|
|
unsigned char c1, c2;
|
|
|
|
while (count) {
|
|
c1 = *cs++;
|
|
c2 = *ct++;
|
|
if (c1 != c2)
|
|
return c1 < c2 ? -1 : 1;
|
|
if (!c1)
|
|
break;
|
|
count--;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
char *skip_spaces(const char *str)
|
|
{
|
|
while (isspace(*str))
|
|
++str;
|
|
return (char *)str;
|
|
}
|
|
|
|
char *strim(char *s)
|
|
{
|
|
size_t size;
|
|
char *end;
|
|
|
|
size = strlen(s);
|
|
if (!size)
|
|
return s;
|
|
|
|
end = s + size - 1;
|
|
while (end >= s && isspace(*end))
|
|
end--;
|
|
*(end + 1) = '\0';
|
|
|
|
return skip_spaces(s);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* simple_strtoull - convert a string to an unsigned long long
|
|
* @cp: The start of the string
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
|
* @base: The number base to use
|
|
*/
|
|
|
|
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;
|
|
|
|
while (isxdigit(*cp)) {
|
|
unsigned int value;
|
|
|
|
value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
|
|
if (value >= base)
|
|
break;
|
|
result = result * base + value;
|
|
cp++;
|
|
}
|
|
if (endp)
|
|
*endp = (char *)cp;
|
|
|
|
return result;
|
|
}
|
|
|
|
long simple_strtol(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
if (*cp == '-')
|
|
return -simple_strtoull(cp + 1, endp, base);
|
|
|
|
return simple_strtoull(cp, endp, base);
|
|
}
|
|
|
|
int kstrtobool(const char *s, bool *res)
|
|
{
|
|
if (!s)
|
|
return -EINVAL;
|
|
|
|
switch (s[0]) {
|
|
case 'y':
|
|
case 'Y':
|
|
case '1':
|
|
*res = true;
|
|
return 0;
|
|
case 'n':
|
|
case 'N':
|
|
case '0':
|
|
*res = false;
|
|
return 0;
|
|
case 'o':
|
|
case 'O':
|
|
switch (s[1]) {
|
|
case 'n':
|
|
case 'N':
|
|
*res = true;
|
|
return 0;
|
|
case 'f':
|
|
case 'F':
|
|
*res = false;
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|