diff options
Diffstat (limited to 'util/ldid-xerub/minimal/mapping.h')
-rw-r--r-- | util/ldid-xerub/minimal/mapping.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/util/ldid-xerub/minimal/mapping.h b/util/ldid-xerub/minimal/mapping.h new file mode 100644 index 000000000..2eb53d05d --- /dev/null +++ b/util/ldid-xerub/minimal/mapping.h @@ -0,0 +1,72 @@ +/* Minimal - the simplest thing that could possibly work + * Copyright (C) 2007 Jay Freeman (saurik) +*/ + +/* + * Redistribution and use in source and binary + * forms, with or without modification, are permitted + * provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the + * above copyright notice, this list of conditions + * and the following disclaimer. + * 2. Redistributions in binary form must reproduce the + * above copyright notice, this list of conditions + * and the following disclaimer in the documentation + * and/or other materials provided with the + * distribution. + * 3. The name of the author may not be used to endorse + * or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifndef MINIMAL_MAPPING_H +#define MINIMAL_MAPPING_H + +#include <sys/mman.h> + +#include <errno.h> +#include <unistd.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include "minimal/stdlib.h" + +void *map(const char *path, size_t offset, size_t size, size_t *psize, bool ro) { + int fd; + _syscall(fd = open(path, ro ? O_RDONLY : O_RDWR)); + + if (size == _not(size_t)) { + struct stat stat; + _syscall(fstat(fd, &stat)); + size = stat.st_size; + } + + if (psize != NULL) + *psize = size; + + void *base; + _syscall(base = mmap(NULL, size, ro ? PROT_READ : PROT_READ | PROT_WRITE, MAP_SHARED, fd, offset)); + + _syscall(close(fd)); + return base; +} + +#endif/*MINIMAL_MAPPING_H*/ |