/*
* mmap support for qemu
- *
+ *
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
return -EINVAL;
if (len == 0)
return 0;
-
+
host_start = start & qemu_host_page_mask;
host_end = HOST_PAGE_ALIGN(end);
if (start > host_start) {
for(addr = end; addr < host_end; addr += TARGET_PAGE_SIZE) {
prot1 |= page_get_flags(addr);
}
- ret = mprotect(g2h(host_end - qemu_host_page_size), qemu_host_page_size,
+ ret = mprotect(g2h(host_end - qemu_host_page_size), qemu_host_page_size,
prot1 & PAGE_BITS);
if (ret != 0)
return ret;
host_end -= qemu_host_page_size;
}
-
+
/* handle the pages in the middle */
if (host_start < host_end) {
ret = mprotect(g2h(host_start), host_end - host_start, prot);
}
/* map an incomplete host page */
-static int mmap_frag(target_ulong real_start,
- target_ulong start, target_ulong end,
+static int mmap_frag(target_ulong real_start,
+ target_ulong start, target_ulong end,
int prot, int flags, int fd, target_ulong offset)
{
target_ulong real_end, ret, addr;
if (addr < start || addr >= end)
prot1 |= page_get_flags(addr);
}
-
+
if (prot1 == 0) {
/* no page was there, so we allocate one */
- ret = (long)mmap(host_start, qemu_host_page_size, prot,
+ ret = (long)mmap(host_start, qemu_host_page_size, prot,
flags | MAP_ANONYMOUS, -1, 0);
if (ret == -1)
return ret;
/* adjust protection to be able to read */
if (!(prot1 & PROT_WRITE))
mprotect(host_start, qemu_host_page_size, prot1 | PROT_WRITE);
-
+
/* read the corresponding file data */
pread(fd, g2h(start), end - start, offset);
-
+
/* put final protection */
if (prot_new != (prot1 | PROT_WRITE))
mprotect(host_start, qemu_host_page_size, prot_new);
}
/* NOTE: all the constants are the HOST ones */
-long target_mmap(target_ulong start, target_ulong len, int prot,
+long target_mmap(target_ulong start, target_ulong len, int prot,
int flags, int fd, target_ulong offset)
{
target_ulong ret, end, real_start, real_end, retaddr, host_offset, host_len;
long host_start;
#if defined(__alpha__) || defined(__sparc__) || defined(__x86_64__) || \
- defined(__ia64)
+ defined(__ia64) || defined(__mips__)
static target_ulong last_start = 0x40000000;
#elif defined(__CYGWIN__)
/* Cygwin doesn't have a whole lot of address space. */
#ifdef DEBUG_MMAP
{
printf("mmap: start=0x%lx len=0x%lx prot=%c%c%c flags=",
- start, len,
+ start, len,
prot & PROT_READ ? 'r' : '-',
prot & PROT_WRITE ? 'w' : '-',
prot & PROT_EXEC ? 'x' : '-');
if (!(flags & MAP_FIXED)) {
#if defined(__alpha__) || defined(__sparc__) || defined(__x86_64__) || \
- defined(__ia64) || defined(__CYGWIN__)
- /* tell the kenel to search at the same place as i386 */
+ defined(__ia64) || defined(__mips__) || defined(__CYGWIN__)
+ /* tell the kernel to search at the same place as i386 */
if (real_start == 0) {
real_start = last_start;
last_start += HOST_PAGE_ALIGN(len);
}
#endif
- if (qemu_host_page_size != qemu_real_host_page_size) {
+ if (0 && qemu_host_page_size != qemu_real_host_page_size) {
/* NOTE: this code is only for debugging with '-p' option */
/* ??? Can also occur when TARGET_PAGE_SIZE > host page size. */
/* reserve a memory area */
/* ??? This needs fixing for remapping. */
abort();
host_len = HOST_PAGE_ALIGN(len) + qemu_host_page_size - TARGET_PAGE_SIZE;
- real_start = (long)mmap(g2h(real_start), host_len, PROT_NONE,
+ real_start = (long)mmap(g2h(real_start), host_len, PROT_NONE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (real_start == -1)
return real_start;
start = HOST_PAGE_ALIGN(real_start);
end = start + HOST_PAGE_ALIGN(len);
if (start > real_start)
- munmap((void *)real_start, start - real_start);
+ munmap((void *)g2h(real_start), start - real_start);
if (end < real_end)
- munmap((void *)end, real_end - end);
+ munmap((void *)g2h(end), real_end - end);
/* use it as a fixed mapping */
flags |= MAP_FIXED;
} else {
if (host_start == -1)
return host_start;
/* update start so that it points to the file position at 'offset' */
- if (!(flags & MAP_ANONYMOUS))
+ if (!(flags & MAP_ANONYMOUS))
host_start += offset - host_offset;
start = h2g(host_start);
goto the_end1;
}
}
-
+
if (start & ~TARGET_PAGE_MASK) {
errno = EINVAL;
return -1;
errno = EINVAL;
return -1;
}
- retaddr = target_mmap(start, len, prot | PROT_WRITE,
- MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
+ retaddr = target_mmap(start, len, prot | PROT_WRITE,
+ MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
if (retaddr == -1)
return retaddr;
}
/* handle the end of the mapping */
if (end < real_end) {
- ret = mmap_frag(real_end - qemu_host_page_size,
+ ret = mmap_frag(real_end - qemu_host_page_size,
real_end - qemu_host_page_size, real_end,
- prot, flags, fd,
+ prot, flags, fd,
offset + real_end - qemu_host_page_size - start);
if (ret == -1)
return ret;
real_end -= qemu_host_page_size;
}
-
+
/* map the middle (easier) */
if (real_start < real_end) {
unsigned long offset1;
offset1 = 0;
else
offset1 = offset + real_start - start;
- ret = (long)mmap(g2h(real_start), real_end - real_start,
+ ret = (long)mmap(g2h(real_start), real_end - real_start,
prot, flags, fd, offset1);
if (ret == -1)
return ret;
if (prot != 0)
real_end -= qemu_host_page_size;
}
-
+
/* unmap what we can */
if (real_start < real_end) {
- ret = munmap((void *)real_start, real_end - real_start);
+ ret = munmap(g2h(real_start), real_end - real_start);
if (ret != 0)
return ret;
}
/* XXX: currently, we only handle MAP_ANONYMOUS and not MAP_FIXED
blocks which have been allocated starting on a host page */
-long target_mremap(target_ulong old_addr, target_ulong old_size,
+long target_mremap(target_ulong old_addr, target_ulong old_size,
target_ulong new_size, unsigned long flags,
target_ulong new_addr)
{
return -EINVAL;
if (end == start)
return 0;
-
+
start &= qemu_host_page_mask;
return msync(g2h(start), end - start, flags);
}
projects / qemu / blobdiff