/* Minimal replacements for basic facilities used in the dynamic linker.
- Copyright (C) 1995-1998,2000-2002,2004-2006,2007,2009
- Free Software Foundation, Inc.
+ Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <limits.h>
+#include <stdio.h>
#include <string.h>
#include <tls.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include <ldsodefs.h>
-#include <stdio-common/_itoa.h>
+#include <_itoa.h>
+#include <malloc/malloc-internal.h>
#include <assert.h>
-/* Minimal `malloc' allocator for use while loading shared libraries.
- No block is ever freed. */
+/* Minimal malloc allocator for used during initial link. After the
+ initial link, a full malloc implementation is interposed, either
+ the one in libc, or a different one supplied by the user through
+ interposition. */
static void *alloc_ptr, *alloc_end, *alloc_last_block;
/* Declarations of global functions. */
extern void weak_function free (void *ptr);
extern void * weak_function realloc (void *ptr, size_t n);
-extern unsigned long int weak_function __strtoul_internal (const char *nptr,
- char **endptr,
- int base,
- int group);
-extern unsigned long int weak_function strtoul (const char *nptr,
- char **endptr, int base);
/* Allocate an aligned memory block. */
void * weak_function
-__libc_memalign (size_t align, size_t n)
+malloc (size_t n)
{
if (alloc_end == 0)
{
}
/* Make sure the allocation pointer is ideally aligned. */
- alloc_ptr = (void *) 0 + (((alloc_ptr - (void *) 0) + align - 1)
- & ~(align - 1));
+ alloc_ptr = (void *) 0 + (((alloc_ptr - (void *) 0) + MALLOC_ALIGNMENT - 1)
+ & ~(MALLOC_ALIGNMENT - 1));
if (alloc_ptr + n >= alloc_end || n >= -(uintptr_t) alloc_ptr)
{
- /* Insufficient space left; allocate another page. */
+ /* Insufficient space left; allocate another page plus one extra
+ page to reduce number of mmap calls. */
caddr_t page;
size_t nup = (n + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
- if (__builtin_expect (nup == 0, 0))
- {
- if (n)
- return NULL;
- nup = GLRO(dl_pagesize);
- }
+ if (__glibc_unlikely (nup == 0 && n != 0))
+ return NULL;
+ nup += GLRO(dl_pagesize);
page = __mmap (0, nup, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0);
if (page == MAP_FAILED)
return alloc_last_block;
}
-void * weak_function
-malloc (size_t n)
-{
- return __libc_memalign (sizeof (double), n);
-}
-
/* We use this function occasionally since the real implementation may
be optimized when it can assume the memory it returns already is
set to NUL. */
return msg;
}
\f
-#ifndef NDEBUG
+void
+__libc_fatal (const char *message)
+{
+ _dl_fatal_printf ("%s", message);
+}
+rtld_hidden_def (__libc_fatal)
+void
+__attribute__ ((noreturn))
+__chk_fail (void)
+{
+ _exit (127);
+}
+rtld_hidden_def (__chk_fail)
+
+#ifndef NDEBUG
/* Define (weakly) our own assert failure function which doesn't use stdio.
If we are linked into the user program (-ldl), the normal __assert_fail
defn can override this one. */
assertion);
}
-rtld_hidden_weak(__assert_fail)
+rtld_hidden_weak (__assert_fail)
void weak_function
__assert_perror_fail (int errnum,
}
rtld_hidden_weak (__assert_perror_fail)
#endif
-
-unsigned long int weak_function
-__strtoul_internal (const char *nptr, char **endptr, int base, int group)
-{
- unsigned long int result = 0;
- long int sign = 1;
-
- while (*nptr == ' ' || *nptr == '\t')
- ++nptr;
-
- if (*nptr == '-')
- {
- sign = -1;
- ++nptr;
- }
- else if (*nptr == '+')
- ++nptr;
-
- if (*nptr < '0' || *nptr > '9')
- {
- if (endptr != NULL)
- *endptr = (char *) nptr;
- return 0UL;
- }
-
- assert (base == 0);
- base = 10;
- if (*nptr == '0')
- {
- if (nptr[1] == 'x' || nptr[1] == 'X')
- {
- base = 16;
- nptr += 2;
- }
- else
- base = 8;
- }
-
- while (*nptr >= '0' && *nptr <= '9')
- {
- unsigned long int digval = *nptr - '0';
- if (result > ULONG_MAX / 10
- || (result == ULONG_MAX / 10 && digval > ULONG_MAX % 10))
- {
- errno = ERANGE;
- if (endptr != NULL)
- *endptr = (char *) nptr;
- return ULONG_MAX;
- }
- result *= base;
- result += digval;
- ++nptr;
- }
-
- if (endptr != NULL)
- *endptr = (char *) nptr;
- return result * sign;
-}
-
-
+\f
#undef _itoa
/* We always use _itoa instead of _itoa_word in ld.so since the former
also has to be present and it is never about speed when these
functions are used. */
char *
-_itoa (value, buflim, base, upper_case)
- unsigned long long int value;
- char *buflim;
- unsigned int base;
- int upper_case;
+_itoa (unsigned long long int value, char *buflim, unsigned int base,
+ int upper_case)
{
- extern const char INTUSE(_itoa_lower_digits)[] attribute_hidden;
-
assert (! upper_case);
do
- *--buflim = INTUSE(_itoa_lower_digits)[value % base];
+ *--buflim = _itoa_lower_digits[value % base];
while ((value /= base) != 0);
return buflim;
}
-
+/* The '_itoa_lower_digits' variable in libc.so is able to handle bases
+ up to 36. We don't need this here. */
+const char _itoa_lower_digits[16] = "0123456789abcdef";
+rtld_hidden_data_def (_itoa_lower_digits)
+\f
/* The following is not a complete strsep implementation. It cannot
handle empty delimiter strings. But this isn't necessary for the
execution of ld.so. */
}
weak_alias (__strsep, strsep)
strong_alias (__strsep, __strsep_g)
-
-void
-__attribute__ ((noreturn))
-__chk_fail (void)
-{
- _exit (127);
-}
-rtld_hidden_def (__chk_fail)
-
-/* The '_itoa_lower_digits' variable in libc.so is able to handle bases
- up to 36. We don't need this here. */
-const char INTUSE(_itoa_lower_digits)[16] attribute_hidden
- = "0123456789abcdef";
projects / thirdparty / glibc.git / blobdiff