gint flags;
typelib_get_vma(this, &address, &oldsize);
newsize = g_random_boolean()
? (PAGE_SIZE * 1)
: (PAGE_SIZE * 2);
flags = typelib_get_integer_mask(MREMAP_FIXED | MREMAP_MAYMOVE);
// I don't currently handle MREMAP_FIXED.
flags &= ~MREMAP_FIXED;
retcode = syscall_fast_ret(&newaddr, __NR_mremap, // void *
address, // void *old_address
oldsize, // size_t old_size
newsize, // size_t new_size
flags, // int flags
typelib_get_integer()); // unsigned long new_addr
if (retcode == ESUCCESS) {
// FIXME: Do something like this.
// typelib_vma_moved(this, address, newaddr, newsize);
typelib_vma_stale(this, address);
typelib_vma_new(this, newaddr, newsize, VMA_NONE);
}
return retcode;
}
#include "typelib.h"
#include "iknowthis.h"
// Map or unmap files or devices into memory.
// void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
SYSFUZZ(mmap, SYS_mmap, SYS_NONE, CLONE_DEFAULT, 0)
{
gintptr address;
glong retcode;
gsize size;
size = typelib_get_integer();
retcode = syscall_fast_ret(&address, SYS_mmap, // void *
typelib_get_integer(), // void *addr
typelib_get_integer(), // size_t length
size, // int prot
typelib_get_integer(), // int flags
typelib_get_resource(this, NULL, RES_FILE, RF_NONE), // int fd
typelib_get_integer()); // off_t offset
if (retcode == ESUCCESS) {
// First, round size up to PAGE_SIZE
size = (size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
typelib_vma_new(this, address, size, 0);
}
return retcode;
}
