mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/* Copyright (C) 2004-2019 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
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdio_ext.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "libio/libioP.h"
|
|
|
|
/* Return 1 if the whole area PTR .. PTR+SIZE is not writable.
|
|
Return -1 if it is writable. */
|
|
|
|
int
|
|
__readonly_area (const char *ptr, size_t size)
|
|
{
|
|
const void *ptr_end = ptr + size;
|
|
|
|
FILE *fp = fopen ("/proc/self/maps", "rce");
|
|
if (fp == NULL)
|
|
{
|
|
/* It is the system administrator's choice to not have /proc
|
|
available to this process (e.g., because it runs in a chroot
|
|
environment. Don't fail in this case. */
|
|
if (errno == ENOENT
|
|
/* The kernel has a bug in that a process is denied access
|
|
to the /proc filesystem if it is set[ug]id. There has
|
|
been no willingness to change this in the kernel so
|
|
far. */
|
|
|| errno == EACCES)
|
|
return 1;
|
|
return -1;
|
|
}
|
|
|
|
/* We need no locking. */
|
|
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
|
|
|
char *line = NULL;
|
|
size_t linelen = 0;
|
|
|
|
while (! __feof_unlocked (fp))
|
|
{
|
|
if (_IO_getdelim (&line, &linelen, '\n', fp) <= 0)
|
|
break;
|
|
|
|
char *p;
|
|
uintptr_t from = strtoul (line, &p, 16);
|
|
|
|
if (p == line || *p++ != '-')
|
|
break;
|
|
|
|
char *q;
|
|
uintptr_t to = strtoul (p, &q, 16);
|
|
|
|
if (q == p || *q++ != ' ')
|
|
break;
|
|
|
|
if (from < (uintptr_t) ptr_end && to > (uintptr_t) ptr)
|
|
{
|
|
/* Found an entry that at least partially covers the area. */
|
|
if (*q++ != 'r' || *q++ != '-')
|
|
break;
|
|
|
|
if (from <= (uintptr_t) ptr && to >= (uintptr_t) ptr_end)
|
|
{
|
|
size = 0;
|
|
break;
|
|
}
|
|
else if (from <= (uintptr_t) ptr)
|
|
size -= to - (uintptr_t) ptr;
|
|
else if (to >= (uintptr_t) ptr_end)
|
|
size -= (uintptr_t) ptr_end - from;
|
|
else
|
|
size -= to - from;
|
|
|
|
if (!size)
|
|
break;
|
|
}
|
|
}
|
|
|
|
fclose (fp);
|
|
free (line);
|
|
|
|
/* If the whole area between ptr and ptr_end is covered by read-only
|
|
VMAs, return 1. Otherwise return -1. */
|
|
return size == 0 ? 1 : -1;
|
|
}
|